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Add `etcpak` library for faster ETC/ETC2/S3TC imports. 

- `etc` module was renamed to `etcpak` and modified to use the new library.
- PKM importer is removed in the process, it's obsolete.
- Old library `etc2comp` is removed.
- S3TC compression no longer done via `squish` (but decompression still is).
- Slight modifications to etcpak sources for MinGW compatibility,
  to fix LLVM `-Wc++11-narrowing` errors, and to allow using vendored or
  system libpng.

Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>
This commit is contained in:
K. S. Ernest (iFire) Lee 2021-04-06 22:05:56 -07:00 committed by Rémi Verschelde
parent b895071895
commit d840165a32
No known key found for this signature in database
GPG Key ID: C3336907360768E1
101 changed files with 9645 additions and 13477 deletions
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8
COPYRIGHT.txt
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@ -134,10 +134,10 @@ Comment: ENet
Copyright: 2002-2020, Lee Salzman
License: Expat
Files: ./thirdparty/etc2comp/
Comment: Etc2Comp
Copyright: 2015, Etc2Comp Authors
License: Apache-2.0
Files: ./thirdparty/etcpak/
Comment: etcpak
Copyright: 2013-2021, Bartosz Taudul
License: BSD-3-clause
Files: ./thirdparty/fonts/DroidSans*.ttf
Comment: DroidSans font

48
modules/etc/SCsub
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@ -1,48 +0,0 @@
#!/usr/bin/env python
Import("env")
Import("env_modules")
env_etc = env_modules.Clone()
# Thirdparty source files
thirdparty_obj = []
# Not unbundled so far since not widespread as shared library
thirdparty_dir = "#thirdparty/etc2comp/"
thirdparty_sources = [
"EtcBlock4x4.cpp",
"EtcBlock4x4Encoding.cpp",
"EtcBlock4x4Encoding_ETC1.cpp",
"EtcBlock4x4Encoding_R11.cpp",
"EtcBlock4x4Encoding_RG11.cpp",
"EtcBlock4x4Encoding_RGB8A1.cpp",
"EtcBlock4x4Encoding_RGB8.cpp",
"EtcBlock4x4Encoding_RGBA8.cpp",
"Etc.cpp",
"EtcDifferentialTrys.cpp",
"EtcFilter.cpp",
"EtcImage.cpp",
"EtcIndividualTrys.cpp",
"EtcMath.cpp",
"EtcSortedBlockList.cpp",
]
thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
env_etc.Prepend(CPPPATH=[thirdparty_dir])
env_thirdparty = env_etc.Clone()
env_thirdparty.disable_warnings()
env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
env.modules_sources += thirdparty_obj
# Godot source files
module_obj = []
env_etc.add_source_files(module_obj, "*.cpp")
env.modules_sources += module_obj
# Needed to force rebuilding the module files when the thirdparty library is updated.
env.Depends(module_obj, thirdparty_obj)

226
modules/etc/image_compress_etc.cpp
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@ -1,226 +0,0 @@
/*************************************************************************/
/* image_compress_etc.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "image_compress_etc.h"
#include "core/io/image.h"
#include "core/os/copymem.h"
#include "core/os/os.h"
#include "core/string/print_string.h"
#include <Etc.h>
#include <EtcFilter.h>
static Image::Format _get_etc2_mode(Image::UsedChannels format) {
switch (format) {
case Image::USED_CHANNELS_R:
return Image::FORMAT_ETC2_R11;
case Image::USED_CHANNELS_RG:
return Image::FORMAT_ETC2_RG11;
case Image::USED_CHANNELS_RGB:
return Image::FORMAT_ETC2_RGB8;
case Image::USED_CHANNELS_RGBA:
return Image::FORMAT_ETC2_RGBA8;
// TODO: would be nice if we could use FORMAT_ETC2_RGB8A1 for FORMAT_RGBA5551
default:
// TODO: Kept for compatibility, but should be investigated whether it's correct or if it should error out
return Image::FORMAT_ETC2_RGBA8;
}
}
static Etc::Image::Format _image_format_to_etc2comp_format(Image::Format format) {
switch (format) {
case Image::FORMAT_ETC:
return Etc::Image::Format::ETC1;
case Image::FORMAT_ETC2_R11:
return Etc::Image::Format::R11;
case Image::FORMAT_ETC2_R11S:
return Etc::Image::Format::SIGNED_R11;
case Image::FORMAT_ETC2_RG11:
return Etc::Image::Format::RG11;
case Image::FORMAT_ETC2_RG11S:
return Etc::Image::Format::SIGNED_RG11;
case Image::FORMAT_ETC2_RGB8:
return Etc::Image::Format::RGB8;
case Image::FORMAT_ETC2_RGBA8:
return Etc::Image::Format::RGBA8;
case Image::FORMAT_ETC2_RGB8A1:
return Etc::Image::Format::RGB8A1;
default:
ERR_FAIL_V(Etc::Image::Format::UNKNOWN);
}
}
static void _compress_etc(Image *p_img, float p_lossy_quality, bool force_etc1_format, Image::UsedChannels p_channels) {
Image::Format img_format = p_img->get_format();
if (img_format >= Image::FORMAT_DXT1) {
return; //do not compress, already compressed
}
if (img_format > Image::FORMAT_RGBA8) {
// TODO: we should be able to handle FORMAT_RGBA4444 and FORMAT_RGBA5551 eventually
return;
}
// FIXME: Commented out during Vulkan rebase.
/*
if (force_etc1_format) {
// If VRAM compression is using ETC, but image has alpha, convert to RGBA4444 or LA8
// This saves space while maintaining the alpha channel
if (detected_channels == Image::USED_CHANNELS_RGBA) {
if (p_img->has_mipmaps()) {
// Image doesn't support mipmaps with RGBA4444 textures
p_img->clear_mipmaps();
}
p_img->convert(Image::FORMAT_RGBA4444);
return;
} else if (detected_channels == Image::USE_CHANNELS_LA) {
p_img->convert(Image::FORMAT_LA8);
return;
}
}
*/
uint32_t imgw = p_img->get_width(), imgh = p_img->get_height();
Image::Format etc_format = force_etc1_format ? Image::FORMAT_ETC : _get_etc2_mode(p_channels);
Ref<Image> img = p_img->duplicate();
if (img->get_format() != Image::FORMAT_RGBA8) {
img->convert(Image::FORMAT_RGBA8); //still uses RGBA to convert
}
if (img->has_mipmaps()) {
if (next_power_of_2(imgw) != imgw || next_power_of_2(imgh) != imgh) {
img->resize_to_po2();
imgw = img->get_width();
imgh = img->get_height();
}
} else {
if (imgw % 4 != 0 || imgh % 4 != 0) {
if (imgw % 4) {
imgw += 4 - imgw % 4;
}
if (imgh % 4) {
imgh += 4 - imgh % 4;
}
img->resize(imgw, imgh);
}
}
const uint8_t *r = img->get_data().ptr();
ERR_FAIL_COND(!r);
unsigned int target_size = Image::get_image_data_size(imgw, imgh, etc_format, p_img->has_mipmaps());
int mmc = 1 + (p_img->has_mipmaps() ? Image::get_image_required_mipmaps(imgw, imgh, etc_format) : 0);
Vector<uint8_t> dst_data;
dst_data.resize(target_size);
uint8_t *w = dst_data.ptrw();
// prepare parameters to be passed to etc2comp
int num_cpus = OS::get_singleton()->get_processor_count();
int encoding_time = 0;
float effort = 0.0; //default, reasonable time
if (p_lossy_quality > 0.95) {
effort = 80;
} else if (p_lossy_quality > 0.85) {
effort = 60;
} else if (p_lossy_quality > 0.75) {
effort = 40;
}
Etc::ErrorMetric error_metric = Etc::ErrorMetric::RGBX; // NOTE: we can experiment with other error metrics
Etc::Image::Format etc2comp_etc_format = _image_format_to_etc2comp_format(etc_format);
int wofs = 0;
print_verbose("ETC: Begin encoding, format: " + Image::get_format_name(etc_format));
uint64_t t = OS::get_singleton()->get_ticks_msec();
for (int i = 0; i < mmc; i++) {
// convert source image to internal etc2comp format (which is equivalent to Image::FORMAT_RGBAF)
// NOTE: We can alternatively add a case to Image::convert to handle Image::FORMAT_RGBAF conversion.
int mipmap_ofs = 0, mipmap_size = 0, mipmap_w = 0, mipmap_h = 0;
img->get_mipmap_offset_size_and_dimensions(i, mipmap_ofs, mipmap_size, mipmap_w, mipmap_h);
const uint8_t *src = &r[mipmap_ofs];
Etc::ColorFloatRGBA *src_rgba_f = new Etc::ColorFloatRGBA[mipmap_w * mipmap_h];
for (int j = 0; j < mipmap_w * mipmap_h; j++) {
int si = j * 4; // RGBA8
src_rgba_f[j] = Etc::ColorFloatRGBA::ConvertFromRGBA8(src[si], src[si + 1], src[si + 2], src[si + 3]);
}
unsigned char *etc_data = nullptr;
unsigned int etc_data_len = 0;
unsigned int extended_width = 0, extended_height = 0;
Etc::Encode((float *)src_rgba_f, mipmap_w, mipmap_h, etc2comp_etc_format, error_metric, effort, num_cpus, num_cpus, &etc_data, &etc_data_len, &extended_width, &extended_height, &encoding_time);
CRASH_COND(wofs + etc_data_len > target_size);
memcpy(&w[wofs], etc_data, etc_data_len);
wofs += etc_data_len;
delete[] etc_data;
delete[] src_rgba_f;
}
print_verbose("ETC: Time encoding: " + rtos(OS::get_singleton()->get_ticks_msec() - t));
p_img->create(imgw, imgh, p_img->has_mipmaps(), etc_format, dst_data);
}
static void _compress_etc1(Image *p_img, float p_lossy_quality) {
_compress_etc(p_img, p_lossy_quality, true, Image::USED_CHANNELS_RGB);
}
static void _compress_etc2(Image *p_img, float p_lossy_quality, Image::UsedChannels p_channels) {
_compress_etc(p_img, p_lossy_quality, false, p_channels);
}
void _register_etc_compress_func() {
Image::_image_compress_etc1_func = _compress_etc1;
Image::_image_compress_etc2_func = _compress_etc2;
}

114
modules/etc/texture_loader_pkm.cpp
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@ -1,114 +0,0 @@
/*************************************************************************/
/* texture_loader_pkm.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "texture_loader_pkm.h"
#include "core/os/file_access.h"
#include <string.h>
struct ETC1Header {
char tag[6]; // "PKM 10"
uint16_t format = 0; // Format == number of mips (== zero)
uint16_t texWidth = 0; // Texture dimensions, multiple of 4 (big-endian)
uint16_t texHeight = 0;
uint16_t origWidth = 0; // Original dimensions (big-endian)
uint16_t origHeight = 0;
};
RES ResourceFormatPKM::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
if (r_error) {
*r_error = ERR_CANT_OPEN;
}
Error err;
FileAccess *f = FileAccess::open(p_path, FileAccess::READ, &err);
if (!f) {
return RES();
}
FileAccessRef fref(f);
if (r_error) {
*r_error = ERR_FILE_CORRUPT;
}
ERR_FAIL_COND_V_MSG(err != OK, RES(), "Unable to open PKM texture file '" + p_path + "'.");
// big endian
f->set_endian_swap(true);
ETC1Header h;
f->get_buffer((uint8_t *)&h.tag, sizeof(h.tag));
ERR_FAIL_COND_V_MSG(strncmp(h.tag, "PKM 10", sizeof(h.tag)), RES(), "Invalid or unsupported PKM texture file '" + p_path + "'.");
h.format = f->get_16();
h.texWidth = f->get_16();
h.texHeight = f->get_16();
h.origWidth = f->get_16();
h.origHeight = f->get_16();
Vector<uint8_t> src_data;
uint32_t size = h.texWidth * h.texHeight / 2;
src_data.resize(size);
uint8_t *wb = src_data.ptrw();
f->get_buffer(wb, size);
int mipmaps = h.format;
int width = h.origWidth;
int height = h.origHeight;
Ref<Image> img = memnew(Image(width, height, mipmaps, Image::FORMAT_ETC, src_data));
Ref<ImageTexture> texture = memnew(ImageTexture);
texture->create_from_image(img);
if (r_error) {
*r_error = OK;
}
f->close();
memdelete(f);
return texture;
}
void ResourceFormatPKM::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("pkm");
}
bool ResourceFormatPKM::handles_type(const String &p_type) const {
return ClassDB::is_parent_class(p_type, "Texture2D");
}
String ResourceFormatPKM::get_resource_type(const String &p_path) const {
if (p_path.get_extension().to_lower() == "pkm") {
return "ImageTexture";
}
return "";
}

47
modules/etc/texture_loader_pkm.h
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@ -1,47 +0,0 @@
/*************************************************************************/
/* texture_loader_pkm.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef TEXTURE_LOADER_PKM_H
#define TEXTURE_LOADER_PKM_H
#include "core/io/resource_loader.h"
#include "scene/resources/texture.h"
class ResourceFormatPKM : public ResourceFormatLoader {
public:
virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr, CacheMode p_cache_mode = CACHE_MODE_REUSE);
virtual void get_recognized_extensions(List<String> *p_extensions) const;
virtual bool handles_type(const String &p_type) const;
virtual String get_resource_type(const String &p_path) const;
virtual ~ResourceFormatPKM() {}
};
#endif // TEXTURE_LOADER_PKM_H

52
modules/etcpak/SCsub Normal file
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@ -0,0 +1,52 @@
#!/usr/bin/env python
Import("env")
Import("env_modules")
env_etcpak = env_modules.Clone()
# Thirdparty source files
thirdparty_obj = []
thirdparty_dir = "#thirdparty/etcpak/"
thirdparty_sources = [
"Bitmap.cpp",
"BitmapDownsampled.cpp",
"BlockData.cpp",
"ColorSpace.cpp",
"DataProvider.cpp",
"Debug.cpp",
"Dither.cpp",
"Error.cpp",
"mmap.cpp",
"ProcessDxtc.cpp",
"ProcessRGB.cpp",
"System.cpp",
"Tables.cpp",
"TaskDispatch.cpp",
"Timing.cpp",
"lz4/lz4.c",
]
thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
env_etcpak.Prepend(CPPPATH=[thirdparty_dir])
# Also requires libpng headers
if env["builtin_libpng"]:
env_etcpak.Prepend(CPPPATH=["#thirdparty/libpng"])
env_thirdparty = env_etcpak.Clone()
env_thirdparty.disable_warnings()
env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
env.modules_sources += thirdparty_obj
# Godot source files
module_obj = []
env_etcpak.add_source_files(module_obj, "*.cpp")
env.modules_sources += module_obj
# Needed to force rebuilding the module files when the thirdparty library is updated.
env.Depends(module_obj, thirdparty_obj)

0
modules/etc/config.py → modules/etcpak/config.py
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170
modules/etcpak/image_etcpak.cpp Normal file
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@ -0,0 +1,170 @@
/*************************************************************************/
/* image_etcpak.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "image_etcpak.h"
#include "core/os/copymem.h"
#include "core/os/os.h"
#include "core/string/print_string.h"
#include "thirdparty/etcpak/ProcessDxtc.hpp"
#include "thirdparty/etcpak/ProcessRGB.hpp"
// thresholds for the early compression-mode decision scheme in QuickETC2
// which can be changed by the option -e
float ecmd_threshold[3] = { 0.03f, 0.09f, 0.38f };
EtcpakType _determine_etc_type(Image::UsedChannels p_source) {
switch (p_source) {
case Image::USED_CHANNELS_L:
return EtcpakType::ETCPAK_TYPE_ETC1;
case Image::USED_CHANNELS_LA:
return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA;
case Image::USED_CHANNELS_R:
return EtcpakType::ETCPAK_TYPE_ETC2;
case Image::USED_CHANNELS_RG:
return EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG;
case Image::USED_CHANNELS_RGB:
return EtcpakType::ETCPAK_TYPE_ETC2;
case Image::USED_CHANNELS_RGBA:
return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA;
default:
return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA;
}
}
EtcpakType _determine_dxt_type(Image::UsedChannels p_source) {
switch (p_source) {
case Image::USED_CHANNELS_L:
return EtcpakType::ETCPAK_TYPE_DXT1;
case Image::USED_CHANNELS_LA:
return EtcpakType::ETCPAK_TYPE_DXT5;
case Image::USED_CHANNELS_R:
return EtcpakType::ETCPAK_TYPE_DXT5;
case Image::USED_CHANNELS_RG:
return EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG;
case Image::USED_CHANNELS_RGB:
return EtcpakType::ETCPAK_TYPE_DXT5;
case Image::USED_CHANNELS_RGBA:
return EtcpakType::ETCPAK_TYPE_DXT5;
default:
return EtcpakType::ETCPAK_TYPE_DXT5;
}
}
void _compress_etc2(Image *p_img, float p_lossy_quality, Image::UsedChannels p_source) {
EtcpakType type = _determine_etc_type(p_source);
_compress_etcpak(type, p_img, p_lossy_quality, false, p_source);
}
void _compress_bc(Image *p_img, float p_lossy_quality, Image::UsedChannels p_source) {
EtcpakType type = _determine_dxt_type(p_source);
_compress_etcpak(type, p_img, p_lossy_quality, false, p_source);
}
void _compress_etc1(Image *p_img, float p_lossy_quality) {
_compress_etcpak(EtcpakType::ETCPAK_TYPE_ETC1, p_img, p_lossy_quality, true, Image::USED_CHANNELS_RGB);
}
void _compress_etcpak(EtcpakType p_compresstype, Image *p_img, float p_lossy_quality, bool force_etc1_format, Image::UsedChannels p_channels) {
uint64_t t = OS::get_singleton()->get_ticks_msec();
Image::Format img_format = p_img->get_format();
if (img_format >= Image::FORMAT_DXT1) {
return; //do not compress, already compressed
}
if (img_format > Image::FORMAT_RGBA8) {
// TODO: we should be able to handle FORMAT_RGBA4444 and FORMAT_RGBA5551 eventually
return;
}
Image::Format format = Image::FORMAT_RGBA8;
if (p_img->get_format() != Image::FORMAT_RGBA8) {
p_img->convert(Image::FORMAT_RGBA8);
}
if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC1 || force_etc1_format) {
format = Image::FORMAT_ETC;
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2) {
format = Image::FORMAT_ETC2_RGB8;
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG) {
format = Image::FORMAT_ETC2_RA_AS_RG;
p_img->convert_rg_to_ra_rgba8();
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_ALPHA) {
format = Image::FORMAT_ETC2_RGBA8;
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT1) {
format = Image::FORMAT_DXT1;
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG) {
format = Image::FORMAT_DXT5_RA_AS_RG;
p_img->convert_rg_to_ra_rgba8();
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5) {
format = Image::FORMAT_DXT5;
} else {
ERR_FAIL();
}
const bool mipmap = p_img->has_mipmaps();
print_verbose("Encoding format: " + Image::get_format_name(format));
Ref<Image> new_img;
new_img.instance();
new_img->create(p_img->get_width(), p_img->get_height(), mipmap, format);
Vector<uint8_t> data = new_img->get_data();
uint8_t *wr = data.ptrw();
Ref<Image> image = p_img->duplicate();
int mmc = 1 + (mipmap ? Image::get_image_required_mipmaps(new_img->get_width(), new_img->get_height(), format) : 0);
for (int i = 0; i < mmc; i++) {
int ofs, size, mip_w, mip_h;
new_img->get_mipmap_offset_size_and_dimensions(i, ofs, size, mip_w, mip_h);
mip_w = (mip_w + 3) & ~3;
mip_h = (mip_h + 3) & ~3;
Vector<uint8_t> dst_data;
dst_data.resize(size);
int mipmap_ofs = image->get_mipmap_offset(i);
const uint32_t *image_read = (const uint32_t *)&image->get_data().ptr()[mipmap_ofs];
uint64_t *dst_write = (uint64_t *)dst_data.ptrw();
if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC1 || force_etc1_format) {
CompressEtc1RgbDither(image_read, dst_write, mip_w * mip_h / 16, mip_w);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2 || p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG) {
CompressEtc2Rgb(image_read, dst_write, mip_w * mip_h / 16, mip_w);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_ALPHA) {
CompressEtc2Rgba(image_read, dst_write, mip_w * mip_h / 16, mip_w);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5 || p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG) {
CompressDxt5(image_read, dst_write, mip_w * mip_h / 16, mip_w);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT1) {
CompressDxt1Dither(image_read, dst_write, mip_w * mip_h / 16, mip_w);
} else {
ERR_FAIL();
}
copymem(&wr[ofs], dst_data.ptr(), size);
}
p_img->create(new_img->get_width(), new_img->get_height(), mipmap, format, data);
print_verbose(vformat("ETCPAK encode took %s ms.", rtos(OS::get_singleton()->get_ticks_msec() - t)));
}

25
modules/etc/image_compress_etc.h → modules/etcpak/image_etcpak.h
View File

@ -1,5 +1,5 @@
/*************************************************************************/
/* image_compress_etc.h */
/* image_etcpak.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
@ -28,9 +28,24 @@
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef IMAGE_COMPRESS_ETC_H
#define IMAGE_COMPRESS_ETC_H
#ifndef IMAGE_ETCPAK_H
#define IMAGE_ETCPAK_H
void _register_etc_compress_func();
#include "core/io/image.h"
#endif // IMAGE_COMPRESS_ETC_H
enum class EtcpakType {
ETCPAK_TYPE_ETC1,
ETCPAK_TYPE_ETC2,
ETCPAK_TYPE_ETC2_ALPHA,
ETCPAK_TYPE_ETC2_RA_AS_RG,
ETCPAK_TYPE_DXT1,
ETCPAK_TYPE_DXT5,
ETCPAK_TYPE_DXT5_RA_AS_RG,
};
void _compress_etcpak(EtcpakType p_compresstype, Image *p_img, float p_lossy_quality, bool force_etc1_format, Image::UsedChannels p_channels);
void _compress_etc1(Image *p_img, float p_lossy_quality);
void _compress_etc2(Image *p_img, float p_lossy_quality, Image::UsedChannels p_source);
void _compress_bc(Image *p_img, float p_lossy_quality, Image::UsedChannels p_source);
#endif // IMAGE_ETCPAK_H

18
modules/etc/register_types.cpp → modules/etcpak/register_types.cpp
View File

@ -30,19 +30,13 @@
#include "register_types.h"
#include "image_compress_etc.h"
#include "texture_loader_pkm.h"
#include "image_etcpak.h"
static Ref<ResourceFormatPKM> resource_loader_pkm;
void register_etc_types() {
resource_loader_pkm.instance();
ResourceLoader::add_resource_format_loader(resource_loader_pkm);
_register_etc_compress_func();
void register_etcpak_types() {
Image::_image_compress_etc1_func = _compress_etc1;
Image::_image_compress_etc2_func = _compress_etc2;
Image::_image_compress_bc_func = _compress_bc;
}
void unregister_etc_types() {
ResourceLoader::remove_resource_format_loader(resource_loader_pkm);
resource_loader_pkm.unref();
void unregister_etcpak_types() {
}

9
modules/etc/register_types.h → modules/etcpak/register_types.h
View File

@ -28,10 +28,5 @@
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef ETC_REGISTER_TYPES_H
#define ETC_REGISTER_TYPES_H
void register_etc_types();
void unregister_etc_types();
#endif // ETC_REGISTER_TYPES_H
void register_etcpak_types();
void unregister_etcpak_types();

80
modules/squish/image_compress_squish.cpp
View File

@ -76,83 +76,3 @@ void image_decompress_squish(Image *p_image) {
p_image->convert_ra_rgba8_to_rg();
}
}
void image_compress_squish(Image *p_image, float p_lossy_quality, Image::UsedChannels p_channels) {
if (p_image->get_format() >= Image::FORMAT_DXT1) {
return; //do not compress, already compressed
}
int w = p_image->get_width();
int h = p_image->get_height();
if (p_image->get_format() <= Image::FORMAT_RGBA8) {
int squish_comp = squish::kColourRangeFit;
if (p_lossy_quality > 0.85) {
squish_comp = squish::kColourIterativeClusterFit;
} else if (p_lossy_quality > 0.75) {
squish_comp = squish::kColourClusterFit;
}
Image::Format target_format = Image::FORMAT_RGBA8;
p_image->convert(Image::FORMAT_RGBA8); //still uses RGBA to convert
switch (p_channels) {
case Image::USED_CHANNELS_L: {
target_format = Image::FORMAT_DXT1;
squish_comp |= squish::kDxt1;
} break;
case Image::USED_CHANNELS_LA: {
target_format = Image::FORMAT_DXT5;
squish_comp |= squish::kDxt5;
} break;
case Image::USED_CHANNELS_R: {
target_format = Image::FORMAT_RGTC_R;
squish_comp |= squish::kBc4;
} break;
case Image::USED_CHANNELS_RG: {
target_format = Image::FORMAT_RGTC_RG;
squish_comp |= squish::kBc5;
} break;
case Image::USED_CHANNELS_RGB: {
target_format = Image::FORMAT_DXT1;
squish_comp |= squish::kDxt1;
} break;
case Image::USED_CHANNELS_RGBA: {
//TODO, should convert both, then measure which one does a better job
target_format = Image::FORMAT_DXT5;
squish_comp |= squish::kDxt5;
} break;
default: {
ERR_PRINT("Unknown image format, defaulting to RGBA8");
break;
}
}
Vector<uint8_t> data;
int target_size = Image::get_image_data_size(w, h, target_format, p_image->has_mipmaps());
int mm_count = p_image->has_mipmaps() ? Image::get_image_required_mipmaps(w, h, target_format) : 0;
data.resize(target_size);
int shift = Image::get_format_pixel_rshift(target_format);
const uint8_t *rb = p_image->get_data().ptr();
uint8_t *wb = data.ptrw();
int dst_ofs = 0;
for (int i = 0; i <= mm_count; i++) {
int bw = w % 4 != 0 ? w + (4 - w % 4) : w;
int bh = h % 4 != 0 ? h + (4 - h % 4) : h;
int src_ofs = p_image->get_mipmap_offset(i);
squish::CompressImage(&rb[src_ofs], w, h, &wb[dst_ofs], squish_comp);
dst_ofs += (MAX(4, bw) * MAX(4, bh)) >> shift;
w = MAX(w / 2, 1);
h = MAX(h / 2, 1);
}
p_image->create(p_image->get_width(), p_image->get_height(), p_image->has_mipmaps(), target_format, data);
}
}

1
modules/squish/image_compress_squish.h
View File

@ -33,7 +33,6 @@
#include "core/io/image.h"
void image_compress_squish(Image *p_image, float p_lossy_quality, Image::UsedChannels p_channels);
void image_decompress_squish(Image *p_image);
#endif // IMAGE_COMPRESS_SQUISH_H

1
modules/squish/register_types.cpp
View File

@ -32,7 +32,6 @@
#include "image_compress_squish.h"
void register_squish_types() {
Image::set_compress_bc_func(image_compress_squish);
Image::_image_decompress_bc = image_decompress_squish;
}

20
thirdparty/README.md vendored
View File

@ -86,21 +86,19 @@ It is still possible to build against a system wide ENet but doing so
will limit its functionality to IPv4 only.
## etc2comp
## etcpak
- Upstream: https://github.com/google/etc2comp
- Version: git (9cd0f9cae0f32338943699bb418107db61bb66f2, 2017)
- License: Apache 2.0
- Upstream: https://github.com/wolfpld/etcpak
- Version: git (403d38b3f1cb347c196d845d0a05e44a00d17169, 2021)
- License: BSD-3-Clause
Important: Some Godot-made changes, see `patches` folders.
Files extracted from upstream source:
- all .cpp and .h files in EtcLib/
- README.md, LICENSE, AUTHORS
Important: Some files have Godot-made changes.
They are marked with `// -- GODOT start --` and `// -- GODOT end --`
comments.
- All `.cpp` and `.hpp` files in the root folder except `Application.cpp`.
- `lz4` folder.
- `AUTHORS.txt` and `LICENSE.txt`
## fonts

7
thirdparty/etc2comp/AUTHORS vendored
View File

@ -1,7 +0,0 @@
# This is the list of Etc2Comp authors for copyright purposes.
#
# This does not necessarily list everyone who has contributed code, since in
# some cases, their employer may be the copyright holder. To see the full list
# of contributors, see the revision history in source control.
Google Inc.
Blue Shift Inc.

128
thirdparty/etc2comp/Etc.cpp vendored
View File

@ -1,128 +0,0 @@
/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "EtcConfig.h"
#include "Etc.h"
#include "EtcFilter.h"
#include <string.h>
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
// C-style inteface to the encoder
//
void Encode(float *a_pafSourceRGBA,
unsigned int a_uiSourceWidth,
unsigned int a_uiSourceHeight,
Image::Format a_format,
ErrorMetric a_eErrMetric,
float a_fEffort,
unsigned int a_uiJobs,
unsigned int a_uiMaxJobs,
unsigned char **a_ppaucEncodingBits,
unsigned int *a_puiEncodingBitsBytes,
unsigned int *a_puiExtendedWidth,
unsigned int *a_puiExtendedHeight,
int *a_piEncodingTime_ms, bool a_bVerboseOutput)
{
Image image(a_pafSourceRGBA, a_uiSourceWidth,
a_uiSourceHeight,
a_eErrMetric);
image.m_bVerboseOutput = a_bVerboseOutput;
image.Encode(a_format, a_eErrMetric, a_fEffort, a_uiJobs, a_uiMaxJobs);
*a_ppaucEncodingBits = image.GetEncodingBits();
*a_puiEncodingBitsBytes = image.GetEncodingBitsBytes();
*a_puiExtendedWidth = image.GetExtendedWidth();
*a_puiExtendedHeight = image.GetExtendedHeight();
*a_piEncodingTime_ms = image.GetEncodingTimeMs();
}
void EncodeMipmaps(float *a_pafSourceRGBA,
unsigned int a_uiSourceWidth,
unsigned int a_uiSourceHeight,
Image::Format a_format,
ErrorMetric a_eErrMetric,
float a_fEffort,
unsigned int a_uiJobs,
unsigned int a_uiMaxJobs,
unsigned int a_uiMaxMipmaps,
unsigned int a_uiMipFilterFlags,
RawImage* a_pMipmapImages,
int *a_piEncodingTime_ms,
bool a_bVerboseOutput)
{
auto mipWidth = a_uiSourceWidth;
auto mipHeight = a_uiSourceHeight;
int totalEncodingTime = 0;
for(unsigned int mip = 0; mip < a_uiMaxMipmaps && mipWidth >= 1 && mipHeight >= 1; mip++)
{
float* pImageData = nullptr;
float* pMipImage = nullptr;
if(mip == 0)
{
pImageData = a_pafSourceRGBA;
}
else
{
pMipImage = new float[mipWidth*mipHeight*4];
if(FilterTwoPass(a_pafSourceRGBA, a_uiSourceWidth, a_uiSourceHeight, pMipImage, mipWidth, mipHeight, a_uiMipFilterFlags, Etc::FilterLanczos3) )
{
pImageData = pMipImage;
}
}
if ( pImageData )
{
Image image(pImageData, mipWidth, mipHeight, a_eErrMetric);
image.m_bVerboseOutput = a_bVerboseOutput;
image.Encode(a_format, a_eErrMetric, a_fEffort, a_uiJobs, a_uiMaxJobs);
a_pMipmapImages[mip].paucEncodingBits = std::shared_ptr<unsigned char>(image.GetEncodingBits(), [](unsigned char *p) { delete[] p; });
a_pMipmapImages[mip].uiEncodingBitsBytes = image.GetEncodingBitsBytes();
a_pMipmapImages[mip].uiExtendedWidth = image.GetExtendedWidth();
a_pMipmapImages[mip].uiExtendedHeight = image.GetExtendedHeight();
totalEncodingTime += image.GetEncodingTimeMs();
}
if(pMipImage)
{
delete[] pMipImage;
}
if (!pImageData)
{
break;
}
mipWidth >>= 1;
mipHeight >>= 1;
}
*a_piEncodingTime_ms = totalEncodingTime;
}
// ----------------------------------------------------------------------------------------------------
//
}

71
thirdparty/etc2comp/Etc.h vendored
View File

@ -1,71 +0,0 @@
/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcConfig.h"
#include "EtcImage.h"
#include "EtcColor.h"
#include "EtcErrorMetric.h"
#include <memory>
#define ETCCOMP_MIN_EFFORT_LEVEL (0.0f)
#define ETCCOMP_DEFAULT_EFFORT_LEVEL (40.0f)
#define ETCCOMP_MAX_EFFORT_LEVEL (100.0f)
namespace Etc
{
class Block4x4EncodingBits;
struct RawImage
{
int uiExtendedWidth;
int uiExtendedHeight;
unsigned int uiEncodingBitsBytes;
std::shared_ptr<unsigned char> paucEncodingBits;
};
// C-style inteface to the encoder
void Encode(float *a_pafSourceRGBA,
unsigned int a_uiSourceWidth,
unsigned int a_uiSourceHeight,
Image::Format a_format,
ErrorMetric a_eErrMetric,
float a_fEffort,
unsigned int a_uiJobs,
unsigned int a_uimaxJobs,
unsigned char **a_ppaucEncodingBits,
unsigned int *a_puiEncodingBitsBytes,
unsigned int *a_puiExtendedWidth,
unsigned int *a_puiExtendedHeight,
int *a_piEncodingTime_ms, bool a_bVerboseOutput = false);
void EncodeMipmaps(float *a_pafSourceRGBA,
unsigned int a_uiSourceWidth,
unsigned int a_uiSourceHeight,
Image::Format a_format,
ErrorMetric a_eErrMetric,
float a_fEffort,
unsigned int a_uiJobs,
unsigned int a_uiMaxJobs,
unsigned int a_uiMaxMipmaps,
unsigned int a_uiMipFilterFlags,
RawImage* a_pMipmaps,
int *a_piEncodingTime_ms, bool a_bVerboseOutput = false);
}

425
thirdparty/etc2comp/EtcBlock4x4.cpp vendored
View File

@ -1,425 +0,0 @@
/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
EtcBlock4x4.cpp
Implements the state associated with each 4x4 block of pixels in an image
Source images that are not a multiple of 4x4 are extended to fill the Block4x4 using pixels with an
alpha of NAN
*/
#include "EtcConfig.h"
#include "EtcBlock4x4.h"
#include "EtcBlock4x4EncodingBits.h"
#include "EtcColor.h"
#include "EtcImage.h"
#include "EtcColorFloatRGBA.h"
#include "EtcBlock4x4Encoding_RGB8.h"
#include "EtcBlock4x4Encoding_RGBA8.h"
#include "EtcBlock4x4Encoding_RGB8A1.h"
#include "EtcBlock4x4Encoding_R11.h"
#include "EtcBlock4x4Encoding_RG11.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
namespace Etc
{
// ETC pixels are scanned vertically.
// this mapping is for when someone wants to scan the ETC pixels horizontally
const unsigned int Block4x4::s_auiPixelOrderHScan[PIXELS] = { 0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15 };
// ----------------------------------------------------------------------------------------------------
//
Block4x4::Block4x4(void)
{
m_pimageSource = nullptr;
m_uiSourceH = 0;
m_uiSourceV = 0;
m_sourcealphamix = SourceAlphaMix::UNKNOWN;
m_boolBorderPixels = false;
m_boolPunchThroughPixels = false;
m_pencoding = nullptr;
m_errormetric = ErrorMetric::NUMERIC;
}
Block4x4::~Block4x4()
{
m_pimageSource = nullptr;
if (m_pencoding)
{
delete m_pencoding;
m_pencoding = nullptr;
}
}
// ----------------------------------------------------------------------------------------------------
// initialization prior to encoding from a source image
// [a_uiSourceH,a_uiSourceV] is the location of the block in a_pimageSource
// a_paucEncodingBits is the place to store the final encoding
// a_errormetric is used for finding the best encoding
//
void Block4x4::InitFromSource(Image *a_pimageSource,
unsigned int a_uiSourceH, unsigned int a_uiSourceV,
unsigned char *a_paucEncodingBits,
ErrorMetric a_errormetric)
{
Block4x4();
m_pimageSource = a_pimageSource;
m_uiSourceH = a_uiSourceH;
m_uiSourceV = a_uiSourceV;
m_errormetric = a_errormetric;
SetSourcePixels();
// set block encoder function
switch (m_pimageSource->GetFormat())
{
case Image::Format::ETC1:
m_pencoding = new Block4x4Encoding_ETC1;
break;
case Image::Format::RGB8:
case Image::Format::SRGB8:
m_pencoding = new Block4x4Encoding_RGB8;
break;
case Image::Format::RGBA8:
case Image::Format::SRGBA8:
if (a_errormetric == RGBX)
{
m_pencoding = new Block4x4Encoding_RGBA8;
}
else
{
switch (m_sourcealphamix)
{
case SourceAlphaMix::OPAQUE:
m_pencoding = new Block4x4Encoding_RGBA8_Opaque;
break;
case SourceAlphaMix::TRANSPARENT:
m_pencoding = new Block4x4Encoding_RGBA8_Transparent;
break;
case SourceAlphaMix::TRANSLUCENT:
m_pencoding = new Block4x4Encoding_RGBA8;
break;
default:
assert(0);
break;
}
break;
}
break;
case Image::Format::RGB8A1:
case Image::Format::SRGB8A1:
switch (m_sourcealphamix)
{
case SourceAlphaMix::OPAQUE:
m_pencoding = new Block4x4Encoding_RGB8A1_Opaque;
break;
case SourceAlphaMix::TRANSPARENT:
m_pencoding = new Block4x4Encoding_RGB8A1_Transparent;
break;
case SourceAlphaMix::TRANSLUCENT:
if (m_boolPunchThroughPixels)
{
m_pencoding = new Block4x4Encoding_RGB8A1;
}
else
{
m_pencoding = new Block4x4Encoding_RGB8A1_Opaque;
}
break;
default:
assert(0);
break;
}
break;
case Image::Format::R11:
case Image::Format::SIGNED_R11:
m_pencoding = new Block4x4Encoding_R11;
break;
case Image::Format::RG11:
case Image::Format::SIGNED_RG11:
m_pencoding = new Block4x4Encoding_RG11;
break;
default:
assert(0);
break;
}
m_pencoding->InitFromSource(this, m_afrgbaSource,
a_paucEncodingBits, a_errormetric);
}
// ----------------------------------------------------------------------------------------------------
// initialization of encoding state from a prior encoding using encoding bits
// [a_uiSourceH,a_uiSourceV] is the location of the block in a_pimageSource
// a_paucEncodingBits is the place to read the prior encoding
// a_imageformat is used to determine how to interpret a_paucEncodingBits
// a_errormetric was used for the prior encoding
//
void Block4x4::InitFromEtcEncodingBits(Image::Format a_imageformat,
unsigned int a_uiSourceH, unsigned int a_uiSourceV,
unsigned char *a_paucEncodingBits,
Image *a_pimageSource,
ErrorMetric a_errormetric)
{
Block4x4();
m_pimageSource = a_pimageSource;
m_uiSourceH = a_uiSourceH;
m_uiSourceV = a_uiSourceV;
m_errormetric = a_errormetric;
SetSourcePixels();
// set block encoder function
switch (a_imageformat)
{
case Image::Format::ETC1:
m_pencoding = new Block4x4Encoding_ETC1;
break;
case Image::Format::RGB8:
case Image::Format::SRGB8:
m_pencoding = new Block4x4Encoding_RGB8;
break;
case Image::Format::RGBA8:
case Image::Format::SRGBA8:
m_pencoding = new Block4x4Encoding_RGBA8;
break;
case Image::Format::RGB8A1:
case Image::Format::SRGB8A1:
m_pencoding = new Block4x4Encoding_RGB8A1;
break;
case Image::Format::R11:
case Image::Format::SIGNED_R11:
m_pencoding = new Block4x4Encoding_R11;
break;
case Image::Format::RG11:
case Image::Format::SIGNED_RG11:
m_pencoding = new Block4x4Encoding_RG11;
break;
default:
assert(0);
break;
}
m_pencoding->InitFromEncodingBits(this, a_paucEncodingBits, m_afrgbaSource,
m_pimageSource->GetErrorMetric());
}
// ----------------------------------------------------------------------------------------------------
// set source pixels from m_pimageSource
// set m_alphamix
//
void Block4x4::SetSourcePixels(void)
{
Image::Format imageformat = m_pimageSource->GetFormat();
// alpha census
unsigned int uiTransparentSourcePixels = 0;
unsigned int uiOpaqueSourcePixels = 0;
// copy source to consecutive memory locations
// convert from image horizontal scan to block vertical scan
unsigned int uiPixel = 0;
for (unsigned int uiBlockPixelH = 0; uiBlockPixelH < Block4x4::COLUMNS; uiBlockPixelH++)
{
unsigned int uiSourcePixelH = m_uiSourceH + uiBlockPixelH;
for (unsigned int uiBlockPixelV = 0; uiBlockPixelV < Block4x4::ROWS; uiBlockPixelV++)
{
unsigned int uiSourcePixelV = m_uiSourceV + uiBlockPixelV;
ColorFloatRGBA *pfrgbaSource = m_pimageSource->GetSourcePixel(uiSourcePixelH, uiSourcePixelV);
// if pixel extends beyond source image because of block padding
if (pfrgbaSource == nullptr)
{
m_afrgbaSource[uiPixel] = ColorFloatRGBA(0.0f, 0.0f, 0.0f, NAN); // denotes border pixel
m_boolBorderPixels = true;
uiTransparentSourcePixels++;
}
else
{
//get teh current pixel data, and store some of the attributes
//before capping values to fit the encoder type
m_afrgbaSource[uiPixel] = (*pfrgbaSource).ClampRGBA();
if (m_afrgbaSource[uiPixel].fA == 1.0f || m_errormetric == RGBX)
{
m_pimageSource->m_iNumOpaquePixels++;
}
else if (m_afrgbaSource[uiPixel].fA == 0.0f)
{
m_pimageSource->m_iNumTransparentPixels++;
}
else if(m_afrgbaSource[uiPixel].fA > 0.0f && m_afrgbaSource[uiPixel].fA < 1.0f)
{
m_pimageSource->m_iNumTranslucentPixels++;
}
else
{
m_pimageSource->m_numOutOfRangeValues.fA++;
}
if (m_afrgbaSource[uiPixel].fR != 0.0f)
{
m_pimageSource->m_numColorValues.fR++;
//make sure we are getting a float between 0-1
if (m_afrgbaSource[uiPixel].fR - 1.0f > 0.0f)
{
m_pimageSource->m_numOutOfRangeValues.fR++;
}
}
if (m_afrgbaSource[uiPixel].fG != 0.0f)
{
m_pimageSource->m_numColorValues.fG++;
if (m_afrgbaSource[uiPixel].fG - 1.0f > 0.0f)
{
m_pimageSource->m_numOutOfRangeValues.fG++;
}
}
if (m_afrgbaSource[uiPixel].fB != 0.0f)
{
m_pimageSource->m_numColorValues.fB++;
if (m_afrgbaSource[uiPixel].fB - 1.0f > 0.0f)
{
m_pimageSource->m_numOutOfRangeValues.fB++;
}
}
// for formats with no alpha, set source alpha to 1
if (imageformat == Image::Format::ETC1 ||
imageformat == Image::Format::RGB8 ||
imageformat == Image::Format::SRGB8)
{
m_afrgbaSource[uiPixel].fA = 1.0f;
}
if (imageformat == Image::Format::R11 ||
imageformat == Image::Format::SIGNED_R11)
{
m_afrgbaSource[uiPixel].fA = 1.0f;
m_afrgbaSource[uiPixel].fG = 0.0f;
m_afrgbaSource[uiPixel].fB = 0.0f;
}
if (imageformat == Image::Format::RG11 ||
imageformat == Image::Format::SIGNED_RG11)
{
m_afrgbaSource[uiPixel].fA = 1.0f;
m_afrgbaSource[uiPixel].fB = 0.0f;
}
// for RGB8A1, set source alpha to 0.0 or 1.0
// set punch through flag
if (imageformat == Image::Format::RGB8A1 ||
imageformat == Image::Format::SRGB8A1)
{
if (m_afrgbaSource[uiPixel].fA >= 0.5f)
{
m_afrgbaSource[uiPixel].fA = 1.0f;
}
else
{
m_afrgbaSource[uiPixel].fA = 0.0f;
m_boolPunchThroughPixels = true;
}
}
if (m_afrgbaSource[uiPixel].fA == 1.0f || m_errormetric == RGBX)
{
uiOpaqueSourcePixels++;
}
else if (m_afrgbaSource[uiPixel].fA == 0.0f)
{
uiTransparentSourcePixels++;
}
}
uiPixel += 1;
}
}
if (uiOpaqueSourcePixels == PIXELS)
{
m_sourcealphamix = SourceAlphaMix::OPAQUE;
}
else if (uiTransparentSourcePixels == PIXELS)
{
m_sourcealphamix = SourceAlphaMix::TRANSPARENT;
}
else
{
m_sourcealphamix = SourceAlphaMix::TRANSLUCENT;
}
}
// ----------------------------------------------------------------------------------------------------
// return a name for the encoding mode
//
const char * Block4x4::GetEncodingModeName(void)
{
switch (m_pencoding->GetMode())
{
case Block4x4Encoding::MODE_ETC1:
return "ETC1";
case Block4x4Encoding::MODE_T:
return "T";
case Block4x4Encoding::MODE_H:
return "H";
case Block4x4Encoding::MODE_PLANAR:
return "PLANAR";
default:
return "???";
}
}
// ----------------------------------------------------------------------------------------------------
//
}

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcColor.h"
#include "EtcColorFloatRGBA.h"
#include "EtcErrorMetric.h"
#include "EtcImage.h"
#include "EtcBlock4x4Encoding.h"
namespace Etc
{
class Block4x4EncodingBits;
class Block4x4
{
public:
static const unsigned int ROWS = 4;
static const unsigned int COLUMNS = 4;
static const unsigned int PIXELS = ROWS * COLUMNS;
// the alpha mix for a 4x4 block of pixels
enum class SourceAlphaMix
{
UNKNOWN,
//
OPAQUE, // all 1.0
TRANSPARENT, // all 0.0 or NAN
TRANSLUCENT // not all opaque or transparent
};
typedef void (Block4x4::*EncoderFunctionPtr)(void);
Block4x4(void);
~Block4x4();
void InitFromSource(Image *a_pimageSource,
unsigned int a_uiSourceH,
unsigned int a_uiSourceV,
unsigned char *a_paucEncodingBits,
ErrorMetric a_errormetric);
void InitFromEtcEncodingBits(Image::Format a_imageformat,
unsigned int a_uiSourceH,
unsigned int a_uiSourceV,
unsigned char *a_paucEncodingBits,
Image *a_pimageSource,
ErrorMetric a_errormetric);
// return true if final iteration was performed
inline void PerformEncodingIteration(float a_fEffort)
{
m_pencoding->PerformIteration(a_fEffort);
}
inline void SetEncodingBitsFromEncoding(void)
{
m_pencoding->SetEncodingBits();
}
inline unsigned int GetSourceH(void)
{
return m_uiSourceH;
}
inline unsigned int GetSourceV(void)
{
return m_uiSourceV;
}
inline float GetError(void)
{
return m_pencoding->GetError();
}
static const unsigned int s_auiPixelOrderHScan[PIXELS];
inline ColorFloatRGBA * GetDecodedColors(void)
{
return m_pencoding->GetDecodedColors();
}
inline float * GetDecodedAlphas(void)
{
return m_pencoding->GetDecodedAlphas();
}
inline Block4x4Encoding::Mode GetEncodingMode(void)
{
return m_pencoding->GetMode();
}
inline bool GetFlip(void)
{
return m_pencoding->GetFlip();
}
inline bool IsDifferential(void)
{
return m_pencoding->IsDifferential();
}
inline ColorFloatRGBA * GetSource()
{
return m_afrgbaSource;
}
inline ErrorMetric GetErrorMetric()
{
return m_errormetric;
}
const char * GetEncodingModeName(void);
inline Block4x4Encoding * GetEncoding(void)
{
return m_pencoding;
}
inline SourceAlphaMix GetSourceAlphaMix(void)
{
return m_sourcealphamix;
}
inline Image * GetImageSource(void)
{
return m_pimageSource;
}
inline bool HasBorderPixels(void)
{
return m_boolBorderPixels;
}
inline bool HasPunchThroughPixels(void)
{
return m_boolPunchThroughPixels;
}
private:
void SetSourcePixels(void);
Image *m_pimageSource;
unsigned int m_uiSourceH;
unsigned int m_uiSourceV;
ErrorMetric m_errormetric;
ColorFloatRGBA m_afrgbaSource[PIXELS]; // vertical scan
SourceAlphaMix m_sourcealphamix;
bool m_boolBorderPixels; // marked as rgba(NAN, NAN, NAN, NAN)
bool m_boolPunchThroughPixels; // RGB8A1 or SRGB8A1 with any pixels with alpha < 0.5
Block4x4Encoding *m_pencoding;
};
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
EtcBlock4x4Encoding.cpp
Block4x4Encoding is the abstract base class for the different encoders. Each encoder targets a
particular file format (e.g. ETC1, RGB8, RGBA8, R11)
*/
#include "EtcConfig.h"
#include "EtcBlock4x4Encoding.h"
#include "EtcBlock4x4EncodingBits.h"
#include "EtcBlock4x4.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
//
const float Block4x4Encoding::LUMA_WEIGHT = 3.0f;
const float Block4x4Encoding::CHROMA_BLUE_WEIGHT = 0.5f;
// ----------------------------------------------------------------------------------------------------
//
Block4x4Encoding::Block4x4Encoding(void)
{
m_pblockParent = nullptr;
m_pafrgbaSource = nullptr;
m_boolBorderPixels = false;
m_fError = -1.0f;
m_mode = MODE_UNKNOWN;
m_uiEncodingIterations = 0;
m_boolDone = false;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(-1.0f, -1.0f, -1.0f, -1.0f);
m_afDecodedAlphas[uiPixel] = -1.0f;
}
}
// ----------------------------------------------------------------------------------------------------
// initialize the generic encoding for a 4x4 block
// a_pblockParent points to the block associated with this encoding
// a_errormetric is used to choose the best encoding
// init the decoded pixels to -1 to mark them as undefined
// init the error to -1 to mark it as undefined
//
void Block4x4Encoding::Init(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric)
{
m_pblockParent = a_pblockParent;
m_pafrgbaSource = a_pafrgbaSource;
m_boolBorderPixels = m_pblockParent->HasBorderPixels();
m_fError = -1.0f;
m_uiEncodingIterations = 0;
m_errormetric = a_errormetric;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(-1.0f, -1.0f, -1.0f, -1.0f);
m_afDecodedAlphas[uiPixel] = -1.0f;
}
}
// ----------------------------------------------------------------------------------------------------
// calculate the error for the block by summing the pixel errors
//
void Block4x4Encoding::CalcBlockError(void)
{
m_fError = 0.0f;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
m_fError += CalcPixelError(m_afrgbaDecodedColors[uiPixel], m_afDecodedAlphas[uiPixel],
m_pafrgbaSource[uiPixel]);
}
}
// ----------------------------------------------------------------------------------------------------
// calculate the error between the source pixel and the decoded pixel
// the error amount is base on the error metric
//
float Block4x4Encoding::CalcPixelError(ColorFloatRGBA a_frgbaDecodedColor, float a_fDecodedAlpha,
ColorFloatRGBA a_frgbaSourcePixel)
{
// if a border pixel
if (isnan(a_frgbaSourcePixel.fA))
{
return 0.0f;
}
if (m_errormetric == ErrorMetric::RGBA)
{
assert(a_fDecodedAlpha >= 0.0f);
float fDRed = (a_fDecodedAlpha * a_frgbaDecodedColor.fR) -
(a_frgbaSourcePixel.fA * a_frgbaSourcePixel.fR);
float fDGreen = (a_fDecodedAlpha * a_frgbaDecodedColor.fG) -
(a_frgbaSourcePixel.fA * a_frgbaSourcePixel.fG);
float fDBlue = (a_fDecodedAlpha * a_frgbaDecodedColor.fB) -
(a_frgbaSourcePixel.fA * a_frgbaSourcePixel.fB);
float fDAlpha = a_fDecodedAlpha - a_frgbaSourcePixel.fA;
return fDRed*fDRed + fDGreen*fDGreen + fDBlue*fDBlue + fDAlpha*fDAlpha;
}
else if (m_errormetric == ErrorMetric::RGBX)
{
assert(a_fDecodedAlpha >= 0.0f);
float fDRed = a_frgbaDecodedColor.fR - a_frgbaSourcePixel.fR;
float fDGreen = a_frgbaDecodedColor.fG - a_frgbaSourcePixel.fG;
float fDBlue = a_frgbaDecodedColor.fB - a_frgbaSourcePixel.fB;
float fDAlpha = a_fDecodedAlpha - a_frgbaSourcePixel.fA;
return fDRed*fDRed + fDGreen*fDGreen + fDBlue*fDBlue + fDAlpha*fDAlpha;
}
else if (m_errormetric == ErrorMetric::REC709)
{
assert(a_fDecodedAlpha >= 0.0f);
float fLuma1 = a_frgbaSourcePixel.fR*0.2126f + a_frgbaSourcePixel.fG*0.7152f + a_frgbaSourcePixel.fB*0.0722f;
float fChromaR1 = 0.5f * ((a_frgbaSourcePixel.fR - fLuma1) * (1.0f / (1.0f - 0.2126f)));
float fChromaB1 = 0.5f * ((a_frgbaSourcePixel.fB - fLuma1) * (1.0f / (1.0f - 0.0722f)));
float fLuma2 = a_frgbaDecodedColor.fR*0.2126f +
a_frgbaDecodedColor.fG*0.7152f +
a_frgbaDecodedColor.fB*0.0722f;
float fChromaR2 = 0.5f * ((a_frgbaDecodedColor.fR - fLuma2) * (1.0f / (1.0f - 0.2126f)));
float fChromaB2 = 0.5f * ((a_frgbaDecodedColor.fB - fLuma2) * (1.0f / (1.0f - 0.0722f)));
float fDeltaL = a_frgbaSourcePixel.fA * fLuma1 - a_fDecodedAlpha * fLuma2;
float fDeltaCr = a_frgbaSourcePixel.fA * fChromaR1 - a_fDecodedAlpha * fChromaR2;
float fDeltaCb = a_frgbaSourcePixel.fA * fChromaB1 - a_fDecodedAlpha * fChromaB2;
float fDAlpha = a_fDecodedAlpha - a_frgbaSourcePixel.fA;
// Favor Luma accuracy over Chroma, and Red over Blue
return LUMA_WEIGHT*fDeltaL*fDeltaL +
fDeltaCr*fDeltaCr +
CHROMA_BLUE_WEIGHT*fDeltaCb*fDeltaCb +
fDAlpha*fDAlpha;
#if 0
float fDRed = a_frgbaDecodedPixel.fR - a_frgbaSourcePixel.fR;
float fDGreen = a_frgbaDecodedPixel.fG - a_frgbaSourcePixel.fG;
float fDBlue = a_frgbaDecodedPixel.fB - a_frgbaSourcePixel.fB;
return 2.0f * 3.0f * fDeltaL * fDeltaL + fDRed*fDRed + fDGreen*fDGreen + fDBlue*fDBlue;
#endif
}
else if (m_errormetric == ErrorMetric::NORMALXYZ)
{
float fDecodedX = 2.0f * a_frgbaDecodedColor.fR - 1.0f;
float fDecodedY = 2.0f * a_frgbaDecodedColor.fG - 1.0f;
float fDecodedZ = 2.0f * a_frgbaDecodedColor.fB - 1.0f;
float fDecodedLength = sqrtf(fDecodedX*fDecodedX + fDecodedY*fDecodedY + fDecodedZ*fDecodedZ);
if (fDecodedLength < 0.5f)
{
return 1.0f;
}
else if (fDecodedLength == 0.0f)
{
fDecodedX = 1.0f;
fDecodedY = 0.0f;
fDecodedZ = 0.0f;
}
else
{
fDecodedX /= fDecodedLength;
fDecodedY /= fDecodedLength;
fDecodedZ /= fDecodedLength;
}
float fSourceX = 2.0f * a_frgbaSourcePixel.fR - 1.0f;
float fSourceY = 2.0f * a_frgbaSourcePixel.fG - 1.0f;
float fSourceZ = 2.0f * a_frgbaSourcePixel.fB - 1.0f;
float fSourceLength = sqrtf(fSourceX*fSourceX + fSourceY*fSourceY + fSourceZ*fSourceZ);
if (fSourceLength == 0.0f)
{
fSourceX = 1.0f;
fSourceY = 0.0f;
fSourceZ = 0.0f;
}
else
{
fSourceX /= fSourceLength;
fSourceY /= fSourceLength;
fSourceZ /= fSourceLength;
}
float fDotProduct = fSourceX*fDecodedX + fSourceY*fDecodedY + fSourceZ*fDecodedZ;
float fNormalizedDotProduct = 1.0f - 0.5f * (fDotProduct + 1.0f);
float fDotProductError = fNormalizedDotProduct * fNormalizedDotProduct;
float fLength2 = fDecodedX*fDecodedX + fDecodedY*fDecodedY + fDecodedZ*fDecodedZ;
float fLength2Error = fabsf(1.0f - fLength2);
float fDeltaW = a_frgbaDecodedColor.fA - a_frgbaSourcePixel.fA;
float fErrorW = fDeltaW * fDeltaW;
return fDotProductError + fLength2Error + fErrorW;
}
else // ErrorMetric::NUMERIC
{
assert(a_fDecodedAlpha >= 0.0f);
float fDX = a_frgbaDecodedColor.fR - a_frgbaSourcePixel.fR;
float fDY = a_frgbaDecodedColor.fG - a_frgbaSourcePixel.fG;
float fDZ = a_frgbaDecodedColor.fB - a_frgbaSourcePixel.fB;
float fDW = a_frgbaDecodedColor.fA - a_frgbaSourcePixel.fA;
return fDX*fDX + fDY*fDY + fDZ*fDZ + fDW*fDW;
}
}
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcColorFloatRGBA.h"
#include "EtcErrorMetric.h"
#include <assert.h>
#include <float.h>
namespace Etc
{
class Block4x4;
// abstract base class for specific encodings
class Block4x4Encoding
{
public:
static const unsigned int ROWS = 4;
static const unsigned int COLUMNS = 4;
static const unsigned int PIXELS = ROWS * COLUMNS;
static const float LUMA_WEIGHT;
static const float CHROMA_BLUE_WEIGHT;
typedef enum
{
MODE_UNKNOWN,
//
MODE_ETC1,
MODE_T,
MODE_H,
MODE_PLANAR,
MODE_R11,
MODE_RG11,
//
MODES
} Mode;
Block4x4Encoding(void);
//virtual ~Block4x4Encoding(void) =0;
virtual ~Block4x4Encoding(void) {}
virtual void InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric) = 0;
virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric) = 0;
// perform an iteration of the encoding
// the first iteration must generate a complete, valid (if poor) encoding
virtual void PerformIteration(float a_fEffort) = 0;
void CalcBlockError(void);
inline float GetError(void)
{
assert(m_fError >= 0.0f);
return m_fError;
}
inline ColorFloatRGBA * GetDecodedColors(void)
{
return m_afrgbaDecodedColors;
}
inline float * GetDecodedAlphas(void)
{
return m_afDecodedAlphas;
}
virtual void SetEncodingBits(void) = 0;
virtual bool GetFlip(void) = 0;
virtual bool IsDifferential(void) = 0;
virtual bool HasSeverelyBentDifferentialColors(void) const = 0;
inline Mode GetMode(void)
{
return m_mode;
}
inline bool IsDone(void)
{
return m_boolDone;
}
inline void SetDoneIfPerfect()
{
if (GetError() == 0.0f)
{
m_boolDone = true;
}
}
float CalcPixelError(ColorFloatRGBA a_frgbaDecodedColor, float a_fDecodedAlpha,
ColorFloatRGBA a_frgbaSourcePixel);
protected:
void Init(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
Block4x4 *m_pblockParent;
ColorFloatRGBA *m_pafrgbaSource;
bool m_boolBorderPixels; // if block has any border pixels
ColorFloatRGBA m_afrgbaDecodedColors[PIXELS]; // decoded RGB components, ignore Alpha
float m_afDecodedAlphas[PIXELS]; // decoded alpha component
float m_fError; // error for RGBA relative to m_pafrgbaSource
// intermediate encoding
Mode m_mode;
unsigned int m_uiEncodingIterations;
bool m_boolDone; // all iterations have been done
ErrorMetric m_errormetric;
private:
};
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <assert.h>
namespace Etc
{
// ################################################################################
// Block4x4EncodingBits
// Base class for Block4x4EncodingBits_XXXX
// ################################################################################
class Block4x4EncodingBits
{
public:
enum class Format
{
UNKNOWN,
//
RGB8,
RGBA8,
R11,
RG11,
RGB8A1,
//
FORMATS
};
static unsigned int GetBytesPerBlock(Format a_format)
{
switch (a_format)
{
case Format::RGB8:
case Format::R11:
case Format::RGB8A1:
return 8;
break;
case Format::RGBA8:
case Format::RG11:
return 16;
break;
default:
return 0;
break;
}
}
};
// ################################################################################
// Block4x4EncodingBits_RGB8
// Encoding bits for the RGB portion of ETC1, RGB8, RGB8A1 and RGBA8
// ################################################################################
class Block4x4EncodingBits_RGB8
{
public:
static const unsigned int BYTES_PER_BLOCK = 8;
inline Block4x4EncodingBits_RGB8(void)
{
assert(sizeof(Block4x4EncodingBits_RGB8) == BYTES_PER_BLOCK);
for (unsigned int uiByte = 0; uiByte < BYTES_PER_BLOCK; uiByte++)
{
auc[uiByte] = 0;
}
}
typedef struct
{
unsigned red2 : 4;
unsigned red1 : 4;
//
unsigned green2 : 4;
unsigned green1 : 4;
//
unsigned blue2 : 4;
unsigned blue1 : 4;
//
unsigned flip : 1;
unsigned diff : 1;
unsigned cw2 : 3;
unsigned cw1 : 3;
//
unsigned int selectors;
} Individual;
typedef struct
{
signed dred2 : 3;
unsigned red1 : 5;
//
signed dgreen2 : 3;
unsigned green1 : 5;
//
signed dblue2 : 3;
unsigned blue1 : 5;
//
unsigned flip : 1;
unsigned diff : 1;
unsigned cw2 : 3;
unsigned cw1 : 3;
//
unsigned int selectors;
} Differential;
typedef struct
{
unsigned red1b : 2;
unsigned detect2 : 1;
unsigned red1a : 2;
unsigned detect1 : 3;
//
unsigned blue1 : 4;
unsigned green1 : 4;
//
unsigned green2 : 4;
unsigned red2 : 4;
//
unsigned db : 1;
unsigned diff : 1;
unsigned da : 2;
unsigned blue2 : 4;
//
unsigned int selectors;
} T;
typedef struct
{
unsigned green1a : 3;
unsigned red1 : 4;
unsigned detect1 : 1;
//
unsigned blue1b : 2;
unsigned detect3 : 1;
unsigned blue1a : 1;
unsigned green1b : 1;
unsigned detect2 : 3;
//
unsigned green2a : 3;
unsigned red2 : 4;
unsigned blue1c : 1;
//
unsigned db : 1;
unsigned diff : 1;
unsigned da : 1;
unsigned blue2 : 4;
unsigned green2b : 1;
//
unsigned int selectors;
} H;
typedef struct
{
unsigned originGreen1 : 1;
unsigned originRed : 6;
unsigned detect1 : 1;
//
unsigned originBlue1 : 1;
unsigned originGreen2 : 6;
unsigned detect2 : 1;
//
unsigned originBlue3 : 2;
unsigned detect4 : 1;
unsigned originBlue2 : 2;
unsigned detect3 : 3;
//
unsigned horizRed2 : 1;
unsigned diff : 1;
unsigned horizRed1 : 5;
unsigned originBlue4 : 1;
//
unsigned horizBlue1: 1;
unsigned horizGreen : 7;
//
unsigned vertRed1 : 3;
unsigned horizBlue2 : 5;
//
unsigned vertGreen1 : 5;
unsigned vertRed2 : 3;
//
unsigned vertBlue : 6;
unsigned vertGreen2 : 2;
} Planar;
union
{
unsigned char auc[BYTES_PER_BLOCK];
unsigned long int ul;
Individual individual;
Differential differential;
T t;
H h;
Planar planar;
};
};
// ################################################################################
// Block4x4EncodingBits_A8
// Encoding bits for the A portion of RGBA8
// ################################################################################
class Block4x4EncodingBits_A8
{
public:
static const unsigned int BYTES_PER_BLOCK = 8;
static const unsigned int SELECTOR_BYTES = 6;
typedef struct
{
unsigned base : 8;
unsigned table : 4;
unsigned multiplier : 4;
unsigned selectors0 : 8;
unsigned selectors1 : 8;
unsigned selectors2 : 8;
unsigned selectors3 : 8;
unsigned selectors4 : 8;
unsigned selectors5 : 8;
} Data;
Data data;
};
// ################################################################################
// Block4x4EncodingBits_R11
// Encoding bits for the R portion of R11
// ################################################################################
class Block4x4EncodingBits_R11
{
public:
static const unsigned int BYTES_PER_BLOCK = 8;
static const unsigned int SELECTOR_BYTES = 6;
typedef struct
{
unsigned base : 8;
unsigned table : 4;
unsigned multiplier : 4;
unsigned selectors0 : 8;
unsigned selectors1 : 8;
unsigned selectors2 : 8;
unsigned selectors3 : 8;
unsigned selectors4 : 8;
unsigned selectors5 : 8;
} Data;
Data data;
};
class Block4x4EncodingBits_RG11
{
public:
static const unsigned int BYTES_PER_BLOCK = 16;
static const unsigned int SELECTOR_BYTES = 12;
typedef struct
{
//Red portion
unsigned baseR : 8;
unsigned tableIndexR : 4;
unsigned multiplierR : 4;
unsigned selectorsR0 : 8;
unsigned selectorsR1 : 8;
unsigned selectorsR2 : 8;
unsigned selectorsR3 : 8;
unsigned selectorsR4 : 8;
unsigned selectorsR5 : 8;
//Green portion
unsigned baseG : 8;
unsigned tableIndexG : 4;
unsigned multiplierG : 4;
unsigned selectorsG0 : 8;
unsigned selectorsG1 : 8;
unsigned selectorsG2 : 8;
unsigned selectorsG3 : 8;
unsigned selectorsG4 : 8;
unsigned selectorsG5 : 8;
} Data;
Data data;
};
}

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcBlock4x4Encoding.h"
#include "EtcBlock4x4EncodingBits.h"
#include "EtcDifferentialTrys.h"
#include "EtcIndividualTrys.h"
namespace Etc
{
// base class for Block4x4Encoding_RGB8
class Block4x4Encoding_ETC1 : public Block4x4Encoding
{
public:
Block4x4Encoding_ETC1(void);
virtual ~Block4x4Encoding_ETC1(void);
virtual void InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits,
ErrorMetric a_errormetric);
virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
virtual void PerformIteration(float a_fEffort);
inline virtual bool GetFlip(void)
{
return m_boolFlip;
}
inline virtual bool IsDifferential(void)
{
return m_boolDiff;
}
virtual void SetEncodingBits(void);
void Decode(void);
inline ColorFloatRGBA GetColor1(void) const
{
return m_frgbaColor1;
}
inline ColorFloatRGBA GetColor2(void) const
{
return m_frgbaColor2;
}
inline const unsigned int * GetSelectors(void) const
{
return m_auiSelectors;
}
inline unsigned int GetCW1(void) const
{
return m_uiCW1;
}
inline unsigned int GetCW2(void) const
{
return m_uiCW2;
}
inline bool HasSeverelyBentDifferentialColors(void) const
{
return m_boolSeverelyBentDifferentialColors;
}
protected:
static const unsigned int s_auiPixelOrderFlip0[PIXELS];
static const unsigned int s_auiPixelOrderFlip1[PIXELS];
static const unsigned int s_auiPixelOrderHScan[PIXELS];
static const unsigned int s_auiLeftPixelMapping[8];
static const unsigned int s_auiRightPixelMapping[8];
static const unsigned int s_auiTopPixelMapping[8];
static const unsigned int s_auiBottomPixelMapping[8];
static const unsigned int SELECTOR_BITS = 2;
static const unsigned int SELECTORS = 1 << SELECTOR_BITS;
static const unsigned int CW_BITS = 3;
static const unsigned int CW_RANGES = 1 << CW_BITS;
static float s_aafCwTable[CW_RANGES][SELECTORS];
static unsigned char s_aucDifferentialCwRange[256];
static const int MAX_DIFFERENTIAL = 3;
static const int MIN_DIFFERENTIAL = -4;
void InitFromEncodingBits_Selectors(void);
void PerformFirstIteration(void);
void CalculateMostLikelyFlip(void);
void TryDifferential(bool a_boolFlip, unsigned int a_uiRadius,
int a_iGrayOffset1, int a_iGrayOffset2);
void TryDifferentialHalf(DifferentialTrys::Half *a_phalf);
void TryIndividual(bool a_boolFlip, unsigned int a_uiRadius);
void TryIndividualHalf(IndividualTrys::Half *a_phalf);
void TryDegenerates1(void);
void TryDegenerates2(void);
void TryDegenerates3(void);
void TryDegenerates4(void);
void CalculateSelectors();
void CalculateHalfOfTheSelectors(unsigned int a_uiHalf,
const unsigned int *pauiPixelMapping);
// calculate the distance2 of r_frgbaPixel from r_frgbaTarget's gray line
inline float CalcGrayDistance2(ColorFloatRGBA &r_frgbaPixel,
ColorFloatRGBA &r_frgbaTarget)
{
float fDeltaGray = ((r_frgbaPixel.fR - r_frgbaTarget.fR) +
(r_frgbaPixel.fG - r_frgbaTarget.fG) +
(r_frgbaPixel.fB - r_frgbaTarget.fB)) / 3.0f;
ColorFloatRGBA frgbaPointOnGrayLine = (r_frgbaTarget + fDeltaGray).ClampRGB();
float fDR = r_frgbaPixel.fR - frgbaPointOnGrayLine.fR;
float fDG = r_frgbaPixel.fG - frgbaPointOnGrayLine.fG;
float fDB = r_frgbaPixel.fB - frgbaPointOnGrayLine.fB;
return (fDR*fDR) + (fDG*fDG) + (fDB*fDB);
}
void SetEncodingBits_Selectors(void);
// intermediate encoding
bool m_boolDiff;
bool m_boolFlip;
ColorFloatRGBA m_frgbaColor1;
ColorFloatRGBA m_frgbaColor2;
unsigned int m_uiCW1;
unsigned int m_uiCW2;
unsigned int m_auiSelectors[PIXELS];
// state shared between iterations
ColorFloatRGBA m_frgbaSourceAverageLeft;
ColorFloatRGBA m_frgbaSourceAverageRight;
ColorFloatRGBA m_frgbaSourceAverageTop;
ColorFloatRGBA m_frgbaSourceAverageBottom;
bool m_boolMostLikelyFlip;
// stats
float m_fError1; // error for Etc1 half 1
float m_fError2; // error for Etc1 half 2
bool m_boolSeverelyBentDifferentialColors; // only valid if m_boolDiff;
// final encoding
Block4x4EncodingBits_RGB8 *m_pencodingbitsRGB8; // or RGB8 portion of Block4x4EncodingBits_RGB8A8
private:
void CalculateSourceAverages(void);
};
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
EtcBlock4x4Encoding_R11.cpp
Block4x4Encoding_R11 is the encoder to use when targetting file format R11 and SR11 (signed R11).
*/
#include "EtcConfig.h"
#include "EtcBlock4x4Encoding_R11.h"
#include "EtcBlock4x4EncodingBits.h"
#include "EtcBlock4x4.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <float.h>
#include <limits>
namespace Etc
{
// modifier values to use for R11, SR11, RG11 and SRG11
float Block4x4Encoding_R11::s_aafModifierTable[MODIFIER_TABLE_ENTRYS][SELECTORS]
{
{ -3.0f / 255.0f, -6.0f / 255.0f, -9.0f / 255.0f, -15.0f / 255.0f, 2.0f / 255.0f, 5.0f / 255.0f, 8.0f / 255.0f, 14.0f / 255.0f },
{ -3.0f / 255.0f, -7.0f / 255.0f, -10.0f / 255.0f, -13.0f / 255.0f, 2.0f / 255.0f, 6.0f / 255.0f, 9.0f / 255.0f, 12.0f / 255.0f },
{ -2.0f / 255.0f, -5.0f / 255.0f, -8.0f / 255.0f, -13.0f / 255.0f, 1.0f / 255.0f, 4.0f / 255.0f, 7.0f / 255.0f, 12.0f / 255.0f },
{ -2.0f / 255.0f, -4.0f / 255.0f, -6.0f / 255.0f, -13.0f / 255.0f, 1.0f / 255.0f, 3.0f / 255.0f, 5.0f / 255.0f, 12.0f / 255.0f },
{ -3.0f / 255.0f, -6.0f / 255.0f, -8.0f / 255.0f, -12.0f / 255.0f, 2.0f / 255.0f, 5.0f / 255.0f, 7.0f / 255.0f, 11.0f / 255.0f },
{ -3.0f / 255.0f, -7.0f / 255.0f, -9.0f / 255.0f, -11.0f / 255.0f, 2.0f / 255.0f, 6.0f / 255.0f, 8.0f / 255.0f, 10.0f / 255.0f },
{ -4.0f / 255.0f, -7.0f / 255.0f, -8.0f / 255.0f, -11.0f / 255.0f, 3.0f / 255.0f, 6.0f / 255.0f, 7.0f / 255.0f, 10.0f / 255.0f },
{ -3.0f / 255.0f, -5.0f / 255.0f, -8.0f / 255.0f, -11.0f / 255.0f, 2.0f / 255.0f, 4.0f / 255.0f, 7.0f / 255.0f, 10.0f / 255.0f },
{ -2.0f / 255.0f, -6.0f / 255.0f, -8.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 5.0f / 255.0f, 7.0f / 255.0f, 9.0f / 255.0f },
{ -2.0f / 255.0f, -5.0f / 255.0f, -8.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 4.0f / 255.0f, 7.0f / 255.0f, 9.0f / 255.0f },
{ -2.0f / 255.0f, -4.0f / 255.0f, -8.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 3.0f / 255.0f, 7.0f / 255.0f, 9.0f / 255.0f },
{ -2.0f / 255.0f, -5.0f / 255.0f, -7.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 4.0f / 255.0f, 6.0f / 255.0f, 9.0f / 255.0f },
{ -3.0f / 255.0f, -4.0f / 255.0f, -7.0f / 255.0f, -10.0f / 255.0f, 2.0f / 255.0f, 3.0f / 255.0f, 6.0f / 255.0f, 9.0f / 255.0f },
{ -1.0f / 255.0f, -2.0f / 255.0f, -3.0f / 255.0f, -10.0f / 255.0f, 0.0f / 255.0f, 1.0f / 255.0f, 2.0f / 255.0f, 9.0f / 255.0f },
{ -4.0f / 255.0f, -6.0f / 255.0f, -8.0f / 255.0f, -9.0f / 255.0f, 3.0f / 255.0f, 5.0f / 255.0f, 7.0f / 255.0f, 8.0f / 255.0f },
{ -3.0f / 255.0f, -5.0f / 255.0f, -7.0f / 255.0f, -9.0f / 255.0f, 2.0f / 255.0f, 4.0f / 255.0f, 6.0f / 255.0f, 8.0f / 255.0f }
};
// ----------------------------------------------------------------------------------------------------
//
Block4x4Encoding_R11::Block4x4Encoding_R11(void)
{
m_pencodingbitsR11 = nullptr;
}
Block4x4Encoding_R11::~Block4x4Encoding_R11(void) {}
// ----------------------------------------------------------------------------------------------------
// initialization prior to encoding
// a_pblockParent points to the block associated with this encoding
// a_errormetric is used to choose the best encoding
// a_pafrgbaSource points to a 4x4 block subset of the source image
// a_paucEncodingBits points to the final encoding bits
//
void Block4x4Encoding_R11::InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric)
{
Block4x4Encoding::Init(a_pblockParent, a_pafrgbaSource,a_errormetric);
m_pencodingbitsR11 = (Block4x4EncodingBits_R11 *)a_paucEncodingBits;
}
// ----------------------------------------------------------------------------------------------------
// initialization from the encoding bits of a previous encoding
// a_pblockParent points to the block associated with this encoding
// a_errormetric is used to choose the best encoding
// a_pafrgbaSource points to a 4x4 block subset of the source image
// a_paucEncodingBits points to the final encoding bits of a previous encoding
//
void Block4x4Encoding_R11::InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric)
{
m_pencodingbitsR11 = (Block4x4EncodingBits_R11 *)a_paucEncodingBits;
// init RGB portion
Block4x4Encoding_RGB8::InitFromEncodingBits(a_pblockParent,
(unsigned char *)m_pencodingbitsR11,
a_pafrgbaSource,
a_errormetric);
// init R11 portion
{
m_mode = MODE_R11;
if (a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_R11 || a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11)
{
m_fRedBase = (float)(signed char)m_pencodingbitsR11->data.base;
}
else
{
m_fRedBase = (float)(unsigned char)m_pencodingbitsR11->data.base;
}
m_fRedMultiplier = (float)m_pencodingbitsR11->data.multiplier;
m_uiRedModifierTableIndex = m_pencodingbitsR11->data.table;
unsigned long long int ulliSelectorBits = 0;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors0 << 40;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors1 << 32;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors2 << 24;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors3 << 16;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors4 << 8;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors5;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
unsigned int uiShift = 45 - (3 * uiPixel);
m_auiRedSelectors[uiPixel] = (ulliSelectorBits >> uiShift) & (SELECTORS - 1);
}
// decode the red channel
// calc red error
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
float fDecodedPixelData = 0.0f;
if (a_pblockParent->GetImageSource()->GetFormat() == Image::Format::R11 || a_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11)
{
fDecodedPixelData = DecodePixelRed(m_fRedBase, m_fRedMultiplier,
m_uiRedModifierTableIndex,
m_auiRedSelectors[uiPixel]);
}
else if (a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_R11 || a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11)
{
fDecodedPixelData = DecodePixelRed(m_fRedBase + 128, m_fRedMultiplier,
m_uiRedModifierTableIndex,
m_auiRedSelectors[uiPixel]);
}
else
{
assert(0);
}
m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(fDecodedPixelData, 0.0f, 0.0f, 1.0f);
}
CalcBlockError();
}
}
// ----------------------------------------------------------------------------------------------------
// perform a single encoding iteration
// replace the encoding if a better encoding was found
// subsequent iterations generally take longer for each iteration
// set m_boolDone if encoding is perfect or encoding is finished based on a_fEffort
//
void Block4x4Encoding_R11::PerformIteration(float a_fEffort)
{
assert(!m_boolDone);
m_mode = MODE_R11;
switch (m_uiEncodingIterations)
{
case 0:
m_fError = FLT_MAX;
m_fRedBlockError = FLT_MAX; // artificially high value
CalculateR11(8, 0.0f, 0.0f);
m_fError = m_fRedBlockError;
break;
case 1:
CalculateR11(8, 2.0f, 1.0f);
m_fError = m_fRedBlockError;
if (a_fEffort <= 24.5f)
{
m_boolDone = true;
}
break;
case 2:
CalculateR11(8, 12.0f, 1.0f);
m_fError = m_fRedBlockError;
if (a_fEffort <= 49.5f)
{
m_boolDone = true;
}
break;
case 3:
CalculateR11(7, 6.0f, 1.0f);
m_fError = m_fRedBlockError;
break;
case 4:
CalculateR11(6, 3.0f, 1.0f);
m_fError = m_fRedBlockError;
break;
case 5:
CalculateR11(5, 1.0f, 0.0f);
m_fError = m_fRedBlockError;
m_boolDone = true;
break;
default:
assert(0);
break;
}
m_uiEncodingIterations++;
SetDoneIfPerfect();
}
// ----------------------------------------------------------------------------------------------------
// find the best combination of base color, multiplier and selectors
//
// a_uiSelectorsUsed limits the number of selector combinations to try
// a_fBaseRadius limits the range of base colors to try
// a_fMultiplierRadius limits the range of multipliers to try
//
void Block4x4Encoding_R11::CalculateR11(unsigned int a_uiSelectorsUsed,
float a_fBaseRadius, float a_fMultiplierRadius)
{
// maps from virtual (monotonic) selector to ETC selector
static const unsigned int auiVirtualSelectorMap[8] = {3, 2, 1, 0, 4, 5, 6, 7};
// find min/max red
float fMinRed = 1.0f;
float fMaxRed = 0.0f;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
// ignore border pixels
float fAlpha = m_pafrgbaSource[uiPixel].fA;
if (isnan(fAlpha))
{
continue;
}
float fRed = m_pafrgbaSource[uiPixel].fR;
if (fRed < fMinRed)
{
fMinRed = fRed;
}
if (fRed > fMaxRed)
{
fMaxRed = fRed;
}
}
assert(fMinRed <= fMaxRed);
float fRedRange = (fMaxRed - fMinRed);
// try each modifier table entry
for (unsigned int uiTableEntry = 0; uiTableEntry < MODIFIER_TABLE_ENTRYS; uiTableEntry++)
{
for (unsigned int uiMinVirtualSelector = 0;
uiMinVirtualSelector <= (8- a_uiSelectorsUsed);
uiMinVirtualSelector++)
{
unsigned int uiMaxVirtualSelector = uiMinVirtualSelector + a_uiSelectorsUsed - 1;
unsigned int uiMinSelector = auiVirtualSelectorMap[uiMinVirtualSelector];
unsigned int uiMaxSelector = auiVirtualSelectorMap[uiMaxVirtualSelector];
float fTableEntryCenter = -s_aafModifierTable[uiTableEntry][uiMinSelector];
float fTableEntryRange = s_aafModifierTable[uiTableEntry][uiMaxSelector] -
s_aafModifierTable[uiTableEntry][uiMinSelector];
float fCenterRatio = fTableEntryCenter / fTableEntryRange;
float fCenter = fMinRed + fCenterRatio*fRedRange;
fCenter = roundf(255.0f * fCenter) / 255.0f;
float fMinBase = fCenter - (a_fBaseRadius / 255.0f);
if (fMinBase < 0.0f)
{
fMinBase = 0.0f;
}
float fMaxBase = fCenter + (a_fBaseRadius / 255.0f);
if (fMaxBase > 1.0f)
{
fMaxBase = 1.0f;
}
for (float fBase = fMinBase; fBase <= fMaxBase; fBase += (0.999999f / 255.0f))
{
float fRangeMultiplier = roundf(fRedRange / fTableEntryRange);
float fMinMultiplier = fRangeMultiplier - a_fMultiplierRadius;
if (fMinMultiplier < 1.0f)
{
fMinMultiplier = 0.0f;
}
else if (fMinMultiplier > 15.0f)
{
fMinMultiplier = 15.0f;
}
float fMaxMultiplier = fRangeMultiplier + a_fMultiplierRadius;
if (fMaxMultiplier < 1.0f)
{
fMaxMultiplier = 1.0f;
}
else if (fMaxMultiplier > 15.0f)
{
fMaxMultiplier = 15.0f;
}
for (float fMultiplier = fMinMultiplier; fMultiplier <= fMaxMultiplier; fMultiplier += 1.0f)
{
// find best selector for each pixel
unsigned int auiBestSelectors[PIXELS];
float afBestRedError[PIXELS];
float afBestPixelRed[PIXELS];
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
float fBestPixelRedError = FLT_MAX;
for (unsigned int uiSelector = 0; uiSelector < SELECTORS; uiSelector++)
{
float fPixelRed = DecodePixelRed(fBase * 255.0f, fMultiplier, uiTableEntry, uiSelector);
ColorFloatRGBA frgba(fPixelRed, m_pafrgbaSource[uiPixel].fG,0.0f,1.0f);
float fPixelRedError = CalcPixelError(frgba, 1.0f, m_pafrgbaSource[uiPixel]);
if (fPixelRedError < fBestPixelRedError)
{
fBestPixelRedError = fPixelRedError;
auiBestSelectors[uiPixel] = uiSelector;
afBestRedError[uiPixel] = fBestPixelRedError;
afBestPixelRed[uiPixel] = fPixelRed;
}
}
}
float fBlockError = 0.0f;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
fBlockError += afBestRedError[uiPixel];
}
if (fBlockError < m_fRedBlockError)
{
m_fRedBlockError = fBlockError;
if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::R11 || m_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11)
{
m_fRedBase = 255.0f * fBase;
}
else if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_R11 || m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11)
{
m_fRedBase = (fBase * 255) - 128;
}
else
{
assert(0);
}
m_fRedMultiplier = fMultiplier;
m_uiRedModifierTableIndex = uiTableEntry;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
m_auiRedSelectors[uiPixel] = auiBestSelectors[uiPixel];
float fBestPixelRed = afBestPixelRed[uiPixel];
m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(fBestPixelRed, 0.0f, 0.0f, 1.0f);
m_afDecodedAlphas[uiPixel] = 1.0f;
}
}
}
}
}
}
}
// ----------------------------------------------------------------------------------------------------
// set the encoding bits based on encoding state
//
void Block4x4Encoding_R11::SetEncodingBits(void)
{
if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::R11 || m_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11)
{
m_pencodingbitsR11->data.base = (unsigned char)roundf(m_fRedBase);
}
else if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_R11 || m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11)
{
m_pencodingbitsR11->data.base = (signed char)roundf(m_fRedBase);
}
else
{
assert(0);
}
m_pencodingbitsR11->data.table = m_uiRedModifierTableIndex;
m_pencodingbitsR11->data.multiplier = (unsigned char)roundf(m_fRedMultiplier);
unsigned long long int ulliSelectorBits = 0;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
unsigned int uiShift = 45 - (3 * uiPixel);
ulliSelectorBits |= ((unsigned long long int)m_auiRedSelectors[uiPixel]) << uiShift;
}
m_pencodingbitsR11->data.selectors0 = ulliSelectorBits >> 40;
m_pencodingbitsR11->data.selectors1 = ulliSelectorBits >> 32;
m_pencodingbitsR11->data.selectors2 = ulliSelectorBits >> 24;
m_pencodingbitsR11->data.selectors3 = ulliSelectorBits >> 16;
m_pencodingbitsR11->data.selectors4 = ulliSelectorBits >> 8;
m_pencodingbitsR11->data.selectors5 = ulliSelectorBits;
}
// ----------------------------------------------------------------------------------------------------
//
}

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcBlock4x4Encoding_RGB8.h"
namespace Etc
{
class Block4x4EncodingBits_R11;
// ################################################################################
// Block4x4Encoding_R11
// ################################################################################
class Block4x4Encoding_R11 : public Block4x4Encoding_RGB8
{
public:
Block4x4Encoding_R11(void);
virtual ~Block4x4Encoding_R11(void);
virtual void InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric);
virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
virtual void PerformIteration(float a_fEffort);
virtual void SetEncodingBits(void);
inline float GetRedBase(void) const
{
return m_fRedBase;
}
inline float GetRedMultiplier(void) const
{
return m_fRedMultiplier;
}
inline int GetRedTableIndex(void) const
{
return m_uiRedModifierTableIndex;
}
inline const unsigned int * GetRedSelectors(void) const
{
return m_auiRedSelectors;
}
protected:
static const unsigned int MODIFIER_TABLE_ENTRYS = 16;
static const unsigned int SELECTOR_BITS = 3;
static const unsigned int SELECTORS = 1 << SELECTOR_BITS;
static float s_aafModifierTable[MODIFIER_TABLE_ENTRYS][SELECTORS];
void CalculateR11(unsigned int a_uiSelectorsUsed,
float a_fBaseRadius, float a_fMultiplierRadius);
inline float DecodePixelRed(float a_fBase, float a_fMultiplier,
unsigned int a_uiTableIndex, unsigned int a_uiSelector)
{
float fMultiplier = a_fMultiplier;
if (fMultiplier <= 0.0f)
{
fMultiplier = 1.0f / 8.0f;
}
float fPixelRed = a_fBase * 8 + 4 +
8 * fMultiplier*s_aafModifierTable[a_uiTableIndex][a_uiSelector]*255;
fPixelRed /= 2047.0f;
if (fPixelRed < 0.0f)
{
fPixelRed = 0.0f;
}
else if (fPixelRed > 1.0f)
{
fPixelRed = 1.0f;
}
return fPixelRed;
}
Block4x4EncodingBits_R11 *m_pencodingbitsR11;
float m_fRedBase;
float m_fRedMultiplier;
float m_fRedBlockError;
unsigned int m_uiRedModifierTableIndex;
unsigned int m_auiRedSelectors[PIXELS];
};
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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@ -1,447 +0,0 @@
/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
EtcBlock4x4Encoding_RG11.cpp
Block4x4Encoding_RG11 is the encoder to use when targetting file format RG11 and SRG11 (signed RG11).
*/
#include "EtcConfig.h"
#include "EtcBlock4x4Encoding_RG11.h"
#include "EtcBlock4x4EncodingBits.h"
#include "EtcBlock4x4.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <float.h>
#include <limits>
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
//
Block4x4Encoding_RG11::Block4x4Encoding_RG11(void)
{
m_pencodingbitsRG11 = nullptr;
}
Block4x4Encoding_RG11::~Block4x4Encoding_RG11(void) {}
// ----------------------------------------------------------------------------------------------------
// initialization prior to encoding
// a_pblockParent points to the block associated with this encoding
// a_errormetric is used to choose the best encoding
// a_pafrgbaSource points to a 4x4 block subset of the source image
// a_paucEncodingBits points to the final encoding bits
//
void Block4x4Encoding_RG11::InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric)
{
Block4x4Encoding::Init(a_pblockParent, a_pafrgbaSource,a_errormetric);
m_pencodingbitsRG11 = (Block4x4EncodingBits_RG11 *)a_paucEncodingBits;
}
// ----------------------------------------------------------------------------------------------------
// initialization from the encoding bits of a previous encoding
// a_pblockParent points to the block associated with this encoding
// a_errormetric is used to choose the best encoding
// a_pafrgbaSource points to a 4x4 block subset of the source image
// a_paucEncodingBits points to the final encoding bits of a previous encoding
//
void Block4x4Encoding_RG11::InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric)
{
m_pencodingbitsRG11 = (Block4x4EncodingBits_RG11 *)a_paucEncodingBits;
// init RGB portion
Block4x4Encoding_RGB8::InitFromEncodingBits(a_pblockParent,
(unsigned char *)m_pencodingbitsRG11,
a_pafrgbaSource,
a_errormetric);
m_fError = 0.0f;
{
m_mode = MODE_RG11;
if (a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11)
{
m_fRedBase = (float)(signed char)m_pencodingbitsRG11->data.baseR;
m_fGrnBase = (float)(signed char)m_pencodingbitsRG11->data.baseG;
}
else
{
m_fRedBase = (float)(unsigned char)m_pencodingbitsRG11->data.baseR;
m_fGrnBase = (float)(unsigned char)m_pencodingbitsRG11->data.baseG;
}
m_fRedMultiplier = (float)m_pencodingbitsRG11->data.multiplierR;
m_fGrnMultiplier = (float)m_pencodingbitsRG11->data.multiplierG;
m_uiRedModifierTableIndex = m_pencodingbitsRG11->data.tableIndexR;
m_uiGrnModifierTableIndex = m_pencodingbitsRG11->data.tableIndexG;
unsigned long long int ulliSelectorBitsR = 0;
ulliSelectorBitsR |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsR0 << 40;
ulliSelectorBitsR |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsR1 << 32;
ulliSelectorBitsR |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsR2 << 24;
ulliSelectorBitsR |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsR3 << 16;
ulliSelectorBitsR |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsR4 << 8;
ulliSelectorBitsR |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsR5;
unsigned long long int ulliSelectorBitsG = 0;
ulliSelectorBitsG |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsG0 << 40;
ulliSelectorBitsG |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsG1 << 32;
ulliSelectorBitsG |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsG2 << 24;
ulliSelectorBitsG |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsG3 << 16;
ulliSelectorBitsG |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsG4 << 8;
ulliSelectorBitsG |= (unsigned long long int)m_pencodingbitsRG11->data.selectorsG5;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
unsigned int uiShift = 45 - (3 * uiPixel);
m_auiRedSelectors[uiPixel] = (ulliSelectorBitsR >> uiShift) & (SELECTORS - 1);
m_auiGrnSelectors[uiPixel] = (ulliSelectorBitsG >> uiShift) & (SELECTORS - 1);
}
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
float fRedDecodedData = 0.0f;
float fGrnDecodedData = 0.0f;
if (a_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11)
{
fRedDecodedData = DecodePixelRed(m_fRedBase, m_fRedMultiplier, m_uiRedModifierTableIndex, m_auiRedSelectors[uiPixel]);
fGrnDecodedData = DecodePixelRed(m_fGrnBase, m_fGrnMultiplier, m_uiGrnModifierTableIndex, m_auiGrnSelectors[uiPixel]);
}
else if (a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11)
{
fRedDecodedData = DecodePixelRed(m_fRedBase + 128, m_fRedMultiplier, m_uiRedModifierTableIndex, m_auiRedSelectors[uiPixel]);
fGrnDecodedData = DecodePixelRed(m_fGrnBase + 128, m_fGrnMultiplier, m_uiGrnModifierTableIndex, m_auiGrnSelectors[uiPixel]);
}
else
{
assert(0);
}
m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(fRedDecodedData, fGrnDecodedData, 0.0f, 1.0f);
}
}
CalcBlockError();
}
// ----------------------------------------------------------------------------------------------------
// perform a single encoding iteration
// replace the encoding if a better encoding was found
// subsequent iterations generally take longer for each iteration
// set m_boolDone if encoding is perfect or encoding is finished based on a_fEffort
//
void Block4x4Encoding_RG11::PerformIteration(float a_fEffort)
{
assert(!m_boolDone);
switch (m_uiEncodingIterations)
{
case 0:
m_fError = FLT_MAX;
m_fGrnBlockError = FLT_MAX; // artificially high value
m_fRedBlockError = FLT_MAX;
CalculateR11(8, 0.0f, 0.0f);
CalculateG11(8, 0.0f, 0.0f);
m_fError = (m_fGrnBlockError + m_fRedBlockError);
break;
case 1:
CalculateR11(8, 2.0f, 1.0f);
CalculateG11(8, 2.0f, 1.0f);
m_fError = (m_fGrnBlockError + m_fRedBlockError);
if (a_fEffort <= 24.5f)
{
m_boolDone = true;
}
break;
case 2:
CalculateR11(8, 12.0f, 1.0f);
CalculateG11(8, 12.0f, 1.0f);
m_fError = (m_fGrnBlockError + m_fRedBlockError);
if (a_fEffort <= 49.5f)
{
m_boolDone = true;
}
break;
case 3:
CalculateR11(7, 6.0f, 1.0f);
CalculateG11(7, 6.0f, 1.0f);
m_fError = (m_fGrnBlockError + m_fRedBlockError);
break;
case 4:
CalculateR11(6, 3.0f, 1.0f);
CalculateG11(6, 3.0f, 1.0f);
m_fError = (m_fGrnBlockError + m_fRedBlockError);
break;
case 5:
CalculateR11(5, 1.0f, 0.0f);
CalculateG11(5, 1.0f, 0.0f);
m_fError = (m_fGrnBlockError + m_fRedBlockError);
m_boolDone = true;
break;
default:
assert(0);
break;
}
m_uiEncodingIterations++;
SetDoneIfPerfect();
}
// ----------------------------------------------------------------------------------------------------
// find the best combination of base color, multiplier and selectors
//
// a_uiSelectorsUsed limits the number of selector combinations to try
// a_fBaseRadius limits the range of base colors to try
// a_fMultiplierRadius limits the range of multipliers to try
//
void Block4x4Encoding_RG11::CalculateG11(unsigned int a_uiSelectorsUsed,
float a_fBaseRadius, float a_fMultiplierRadius)
{
// maps from virtual (monotonic) selector to etc selector
static const unsigned int auiVirtualSelectorMap[8] = { 3, 2, 1, 0, 4, 5, 6, 7 };
// find min/max Grn
float fMinGrn = 1.0f;
float fMaxGrn = 0.0f;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
// ignore border pixels
float fAlpha = m_pafrgbaSource[uiPixel].fA;
if (isnan(fAlpha))
{
continue;
}
float fGrn = m_pafrgbaSource[uiPixel].fG;
if (fGrn < fMinGrn)
{
fMinGrn = fGrn;
}
if (fGrn > fMaxGrn)
{
fMaxGrn = fGrn;
}
}
assert(fMinGrn <= fMaxGrn);
float fGrnRange = (fMaxGrn - fMinGrn);
// try each modifier table entry
for (unsigned int uiTableEntry = 0; uiTableEntry < MODIFIER_TABLE_ENTRYS; uiTableEntry++)
{
for (unsigned int uiMinVirtualSelector = 0;
uiMinVirtualSelector <= (8 - a_uiSelectorsUsed);
uiMinVirtualSelector++)
{
unsigned int uiMaxVirtualSelector = uiMinVirtualSelector + a_uiSelectorsUsed - 1;
unsigned int uiMinSelector = auiVirtualSelectorMap[uiMinVirtualSelector];
unsigned int uiMaxSelector = auiVirtualSelectorMap[uiMaxVirtualSelector];
float fTableEntryCenter = -s_aafModifierTable[uiTableEntry][uiMinSelector];
float fTableEntryRange = s_aafModifierTable[uiTableEntry][uiMaxSelector] -
s_aafModifierTable[uiTableEntry][uiMinSelector];
float fCenterRatio = fTableEntryCenter / fTableEntryRange;
float fCenter = fMinGrn + fCenterRatio*fGrnRange;
fCenter = roundf(255.0f * fCenter) / 255.0f;
float fMinBase = fCenter - (a_fBaseRadius / 255.0f);
if (fMinBase < 0.0f)
{
fMinBase = 0.0f;
}
float fMaxBase = fCenter + (a_fBaseRadius / 255.0f);
if (fMaxBase > 1.0f)
{
fMaxBase = 1.0f;
}
for (float fBase = fMinBase; fBase <= fMaxBase; fBase += (0.999999f / 255.0f))
{
float fRangeMultiplier = roundf(fGrnRange / fTableEntryRange);
float fMinMultiplier = fRangeMultiplier - a_fMultiplierRadius;
if (fMinMultiplier < 1.0f)
{
fMinMultiplier = 0.0f;
}
else if (fMinMultiplier > 15.0f)
{
fMinMultiplier = 15.0f;
}
float fMaxMultiplier = fRangeMultiplier + a_fMultiplierRadius;
if (fMaxMultiplier < 1.0f)
{
fMaxMultiplier = 1.0f;
}
else if (fMaxMultiplier > 15.0f)
{
fMaxMultiplier = 15.0f;
}
for (float fMultiplier = fMinMultiplier; fMultiplier <= fMaxMultiplier; fMultiplier += 1.0f)
{
// find best selector for each pixel
unsigned int auiBestSelectors[PIXELS];
float afBestGrnError[PIXELS];
float afBestPixelGrn[PIXELS];
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
float fBestPixelGrnError = FLT_MAX;
for (unsigned int uiSelector = 0; uiSelector < SELECTORS; uiSelector++)
{
//DecodePixelRed is not red channel specific
float fPixelGrn = DecodePixelRed(fBase * 255.0f, fMultiplier, uiTableEntry, uiSelector);
ColorFloatRGBA frgba(m_pafrgbaSource[uiPixel].fR, fPixelGrn, 0.0f, 1.0f);
float fPixelGrnError = CalcPixelError(frgba, 1.0f, m_pafrgbaSource[uiPixel]);
if (fPixelGrnError < fBestPixelGrnError)
{
fBestPixelGrnError = fPixelGrnError;
auiBestSelectors[uiPixel] = uiSelector;
afBestGrnError[uiPixel] = fBestPixelGrnError;
afBestPixelGrn[uiPixel] = fPixelGrn;
}
}
}
float fBlockError = 0.0f;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
fBlockError += afBestGrnError[uiPixel];
}
if (fBlockError < m_fGrnBlockError)
{
m_fGrnBlockError = fBlockError;
if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11)
{
m_fGrnBase = 255.0f * fBase;
}
else if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11)
{
m_fGrnBase = (fBase * 255) - 128;
}
else
{
assert(0);
}
m_fGrnMultiplier = fMultiplier;
m_uiGrnModifierTableIndex = uiTableEntry;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
m_auiGrnSelectors[uiPixel] = auiBestSelectors[uiPixel];
m_afrgbaDecodedColors[uiPixel].fG = afBestPixelGrn[uiPixel];
m_afDecodedAlphas[uiPixel] = 1.0f;
}
}
}
}
}
}
}
// ----------------------------------------------------------------------------------------------------
// set the encoding bits based on encoding state
//
void Block4x4Encoding_RG11::SetEncodingBits(void)
{
unsigned long long int ulliSelectorBitsR = 0;
unsigned long long int ulliSelectorBitsG = 0;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
unsigned int uiShift = 45 - (3 * uiPixel);
ulliSelectorBitsR |= ((unsigned long long int)m_auiRedSelectors[uiPixel]) << uiShift;
ulliSelectorBitsG |= ((unsigned long long int)m_auiGrnSelectors[uiPixel]) << uiShift;
}
if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11)
{
m_pencodingbitsRG11->data.baseR = (unsigned char)roundf(m_fRedBase);
}
else if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11)
{
m_pencodingbitsRG11->data.baseR = (signed char)roundf(m_fRedBase);
}
else
{
assert(0);
}
m_pencodingbitsRG11->data.tableIndexR = m_uiRedModifierTableIndex;
m_pencodingbitsRG11->data.multiplierR = (unsigned char)roundf(m_fRedMultiplier);
m_pencodingbitsRG11->data.selectorsR0 = ulliSelectorBitsR >> 40;
m_pencodingbitsRG11->data.selectorsR1 = ulliSelectorBitsR >> 32;
m_pencodingbitsRG11->data.selectorsR2 = ulliSelectorBitsR >> 24;
m_pencodingbitsRG11->data.selectorsR3 = ulliSelectorBitsR >> 16;
m_pencodingbitsRG11->data.selectorsR4 = ulliSelectorBitsR >> 8;
m_pencodingbitsRG11->data.selectorsR5 = ulliSelectorBitsR;
if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11)
{
m_pencodingbitsRG11->data.baseG = (unsigned char)roundf(m_fGrnBase);
}
else if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11)
{
m_pencodingbitsRG11->data.baseG = (signed char)roundf(m_fGrnBase);
}
else
{
assert(0);
}
m_pencodingbitsRG11->data.tableIndexG = m_uiGrnModifierTableIndex;
m_pencodingbitsRG11->data.multiplierG = (unsigned char)roundf(m_fGrnMultiplier);
m_pencodingbitsRG11->data.selectorsG0 = ulliSelectorBitsG >> 40;
m_pencodingbitsRG11->data.selectorsG1 = ulliSelectorBitsG >> 32;
m_pencodingbitsRG11->data.selectorsG2 = ulliSelectorBitsG >> 24;
m_pencodingbitsRG11->data.selectorsG3 = ulliSelectorBitsG >> 16;
m_pencodingbitsRG11->data.selectorsG4 = ulliSelectorBitsG >> 8;
m_pencodingbitsRG11->data.selectorsG5 = ulliSelectorBitsG;
}
// ----------------------------------------------------------------------------------------------------
//
}

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcBlock4x4Encoding_RGB8.h"
#include "EtcBlock4x4Encoding_R11.h"
namespace Etc
{
class Block4x4EncodingBits_RG11;
// ################################################################################
// Block4x4Encoding_RG11
// ################################################################################
class Block4x4Encoding_RG11 : public Block4x4Encoding_R11
{
float m_fGrnBase;
float m_fGrnMultiplier;
float m_fGrnBlockError;
unsigned int m_auiGrnSelectors[PIXELS];
unsigned int m_uiGrnModifierTableIndex;
public:
Block4x4Encoding_RG11(void);
virtual ~Block4x4Encoding_RG11(void);
virtual void InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric);
virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
virtual void PerformIteration(float a_fEffort);
virtual void SetEncodingBits(void);
Block4x4EncodingBits_RG11 *m_pencodingbitsRG11;
void CalculateG11(unsigned int a_uiSelectorsUsed, float a_fBaseRadius, float a_fMultiplierRadius);
inline float GetGrnBase(void) const
{
return m_fGrnBase;
}
inline float GetGrnMultiplier(void) const
{
return m_fGrnMultiplier;
}
inline int GetGrnTableIndex(void) const
{
return m_uiGrnModifierTableIndex;
}
inline const unsigned int * GetGrnSelectors(void) const
{
return m_auiGrnSelectors;
}
};
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcBlock4x4Encoding_ETC1.h"
namespace Etc
{
class Block4x4Encoding_RGB8 : public Block4x4Encoding_ETC1
{
public:
Block4x4Encoding_RGB8(void);
virtual ~Block4x4Encoding_RGB8(void);
virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
virtual void PerformIteration(float a_fEffort);
virtual void SetEncodingBits(void);
inline ColorFloatRGBA GetColor3(void) const
{
return m_frgbaColor3;
}
protected:
static const unsigned int PLANAR_CORNER_COLORS = 3;
static const unsigned int MAX_PLANAR_REGRESSION_SIZE = 4;
static const unsigned int TH_DISTANCES = 8;
static float s_afTHDistanceTable[TH_DISTANCES];
void TryPlanar(unsigned int a_uiRadius);
void TryTAndH(unsigned int a_uiRadius);
void InitFromEncodingBits_Planar(void);
ColorFloatRGBA m_frgbaColor3; // used for planar
void SetEncodingBits_T(void);
void SetEncodingBits_H(void);
void SetEncodingBits_Planar(void);
// state shared between iterations
ColorFloatRGBA m_frgbaOriginalColor1_TAndH;
ColorFloatRGBA m_frgbaOriginalColor2_TAndH;
void CalculateBaseColorsForTAndH(void);
void TryT(unsigned int a_uiRadius);
void TryT_BestSelectorCombination(void);
void TryH(unsigned int a_uiRadius);
void TryH_BestSelectorCombination(void);
private:
void InitFromEncodingBits_T(void);
void InitFromEncodingBits_H(void);
void CalculatePlanarCornerColors(void);
void ColorRegression(ColorFloatRGBA *a_pafrgbaPixels, unsigned int a_uiPixels,
ColorFloatRGBA *a_pfrgbaSlope, ColorFloatRGBA *a_pfrgbaOffset);
bool TwiddlePlanar(void);
bool TwiddlePlanarR();
bool TwiddlePlanarG();
bool TwiddlePlanarB();
void DecodePixels_T(void);
void DecodePixels_H(void);
void DecodePixels_Planar(void);
};
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcBlock4x4Encoding_RGB8.h"
#include "EtcErrorMetric.h"
#include "EtcBlock4x4EncodingBits.h"
namespace Etc
{
// ################################################################################
// Block4x4Encoding_RGB8A1
// RGB8A1 if not completely opaque or transparent
// ################################################################################
class Block4x4Encoding_RGB8A1 : public Block4x4Encoding_RGB8
{
public:
static const unsigned int TRANSPARENT_SELECTOR = 2;
Block4x4Encoding_RGB8A1(void);
virtual ~Block4x4Encoding_RGB8A1(void);
virtual void InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits,
ErrorMetric a_errormetric);
virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
virtual void PerformIteration(float a_fEffort);
virtual void SetEncodingBits(void);
void InitFromEncodingBits_ETC1(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
void InitFromEncodingBits_T(void);
void InitFromEncodingBits_H(void);
void PerformFirstIteration(void);
void Decode_ETC1(void);
void DecodePixels_T(void);
void DecodePixels_H(void);
void SetEncodingBits_ETC1(void);
void SetEncodingBits_T(void);
void SetEncodingBits_H(void);
protected:
bool m_boolOpaque; // all source pixels have alpha >= 0.5
bool m_boolTransparent; // all source pixels have alpha < 0.5
bool m_boolPunchThroughPixels; // some source pixels have alpha < 0.5
static float s_aafCwOpaqueUnsetTable[CW_RANGES][SELECTORS];
private:
void TryDifferential(bool a_boolFlip, unsigned int a_uiRadius,
int a_iGrayOffset1, int a_iGrayOffset2);
void TryDifferentialHalf(DifferentialTrys::Half *a_phalf);
void TryT(unsigned int a_uiRadius);
void TryT_BestSelectorCombination(void);
void TryH(unsigned int a_uiRadius);
void TryH_BestSelectorCombination(void);
void TryDegenerates1(void);
void TryDegenerates2(void);
void TryDegenerates3(void);
void TryDegenerates4(void);
};
// ################################################################################
// Block4x4Encoding_RGB8A1_Opaque
// RGB8A1 if all pixels have alpha==1
// ################################################################################
class Block4x4Encoding_RGB8A1_Opaque : public Block4x4Encoding_RGB8A1
{
public:
virtual void PerformIteration(float a_fEffort);
void PerformFirstIteration(void);
private:
};
// ################################################################################
// Block4x4Encoding_RGB8A1_Transparent
// RGB8A1 if all pixels have alpha==0
// ################################################################################
class Block4x4Encoding_RGB8A1_Transparent : public Block4x4Encoding_RGB8A1
{
public:
virtual void PerformIteration(float a_fEffort);
private:
};
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
EtcBlock4x4Encoding_RGBA8.cpp contains:
Block4x4Encoding_RGBA8
Block4x4Encoding_RGBA8_Opaque
Block4x4Encoding_RGBA8_Transparent
These encoders are used when targetting file format RGBA8.
Block4x4Encoding_RGBA8_Opaque is used when all pixels in the 4x4 block are opaque
Block4x4Encoding_RGBA8_Transparent is used when all pixels in the 4x4 block are transparent
Block4x4Encoding_RGBA8 is used when there is a mixture of alphas in the 4x4 block
*/
#include "EtcConfig.h"
#include "EtcBlock4x4Encoding_RGBA8.h"
#include "EtcBlock4x4EncodingBits.h"
#include "EtcBlock4x4.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <float.h>
#include <limits>
namespace Etc
{
// ####################################################################################################
// Block4x4Encoding_RGBA8
// ####################################################################################################
float Block4x4Encoding_RGBA8::s_aafModifierTable[MODIFIER_TABLE_ENTRYS][ALPHA_SELECTORS]
{
{ -3.0f / 255.0f, -6.0f / 255.0f, -9.0f / 255.0f, -15.0f / 255.0f, 2.0f / 255.0f, 5.0f / 255.0f, 8.0f / 255.0f, 14.0f / 255.0f },
{ -3.0f / 255.0f, -7.0f / 255.0f, -10.0f / 255.0f, -13.0f / 255.0f, 2.0f / 255.0f, 6.0f / 255.0f, 9.0f / 255.0f, 12.0f / 255.0f },
{ -2.0f / 255.0f, -5.0f / 255.0f, -8.0f / 255.0f, -13.0f / 255.0f, 1.0f / 255.0f, 4.0f / 255.0f, 7.0f / 255.0f, 12.0f / 255.0f },
{ -2.0f / 255.0f, -4.0f / 255.0f, -6.0f / 255.0f, -13.0f / 255.0f, 1.0f / 255.0f, 3.0f / 255.0f, 5.0f / 255.0f, 12.0f / 255.0f },
{ -3.0f / 255.0f, -6.0f / 255.0f, -8.0f / 255.0f, -12.0f / 255.0f, 2.0f / 255.0f, 5.0f / 255.0f, 7.0f / 255.0f, 11.0f / 255.0f },
{ -3.0f / 255.0f, -7.0f / 255.0f, -9.0f / 255.0f, -11.0f / 255.0f, 2.0f / 255.0f, 6.0f / 255.0f, 8.0f / 255.0f, 10.0f / 255.0f },
{ -4.0f / 255.0f, -7.0f / 255.0f, -8.0f / 255.0f, -11.0f / 255.0f, 3.0f / 255.0f, 6.0f / 255.0f, 7.0f / 255.0f, 10.0f / 255.0f },
{ -3.0f / 255.0f, -5.0f / 255.0f, -8.0f / 255.0f, -11.0f / 255.0f, 2.0f / 255.0f, 4.0f / 255.0f, 7.0f / 255.0f, 10.0f / 255.0f },
{ -2.0f / 255.0f, -6.0f / 255.0f, -8.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 5.0f / 255.0f, 7.0f / 255.0f, 9.0f / 255.0f },
{ -2.0f / 255.0f, -5.0f / 255.0f, -8.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 4.0f / 255.0f, 7.0f / 255.0f, 9.0f / 255.0f },
{ -2.0f / 255.0f, -4.0f / 255.0f, -8.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 3.0f / 255.0f, 7.0f / 255.0f, 9.0f / 255.0f },
{ -2.0f / 255.0f, -5.0f / 255.0f, -7.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 4.0f / 255.0f, 6.0f / 255.0f, 9.0f / 255.0f },
{ -3.0f / 255.0f, -4.0f / 255.0f, -7.0f / 255.0f, -10.0f / 255.0f, 2.0f / 255.0f, 3.0f / 255.0f, 6.0f / 255.0f, 9.0f / 255.0f },
{ -1.0f / 255.0f, -2.0f / 255.0f, -3.0f / 255.0f, -10.0f / 255.0f, 0.0f / 255.0f, 1.0f / 255.0f, 2.0f / 255.0f, 9.0f / 255.0f },
{ -4.0f / 255.0f, -6.0f / 255.0f, -8.0f / 255.0f, -9.0f / 255.0f, 3.0f / 255.0f, 5.0f / 255.0f, 7.0f / 255.0f, 8.0f / 255.0f },
{ -3.0f / 255.0f, -5.0f / 255.0f, -7.0f / 255.0f, -9.0f / 255.0f, 2.0f / 255.0f, 4.0f / 255.0f, 6.0f / 255.0f, 8.0f / 255.0f }
};
// ----------------------------------------------------------------------------------------------------
//
Block4x4Encoding_RGBA8::Block4x4Encoding_RGBA8(void)
{
m_pencodingbitsA8 = nullptr;
}
Block4x4Encoding_RGBA8::~Block4x4Encoding_RGBA8(void) {}
// ----------------------------------------------------------------------------------------------------
// initialization prior to encoding
// a_pblockParent points to the block associated with this encoding
// a_errormetric is used to choose the best encoding
// a_pafrgbaSource points to a 4x4 block subset of the source image
// a_paucEncodingBits points to the final encoding bits
//
void Block4x4Encoding_RGBA8::InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric)
{
Block4x4Encoding::Init(a_pblockParent, a_pafrgbaSource,a_errormetric);
m_pencodingbitsA8 = (Block4x4EncodingBits_A8 *)a_paucEncodingBits;
m_pencodingbitsRGB8 = (Block4x4EncodingBits_RGB8 *)(a_paucEncodingBits + sizeof(Block4x4EncodingBits_A8));
}
// ----------------------------------------------------------------------------------------------------
// initialization from the encoding bits of a previous encoding
// a_pblockParent points to the block associated with this encoding
// a_errormetric is used to choose the best encoding
// a_pafrgbaSource points to a 4x4 block subset of the source image
// a_paucEncodingBits points to the final encoding bits of a previous encoding
//
void Block4x4Encoding_RGBA8::InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric)
{
m_pencodingbitsA8 = (Block4x4EncodingBits_A8 *)a_paucEncodingBits;
m_pencodingbitsRGB8 = (Block4x4EncodingBits_RGB8 *)(a_paucEncodingBits + sizeof(Block4x4EncodingBits_A8));
// init RGB portion
Block4x4Encoding_RGB8::InitFromEncodingBits(a_pblockParent,
(unsigned char *) m_pencodingbitsRGB8,
a_pafrgbaSource,
a_errormetric);
// init A8 portion
// has to be done after InitFromEncodingBits()
{
m_fBase = m_pencodingbitsA8->data.base / 255.0f;
m_fMultiplier = (float)m_pencodingbitsA8->data.multiplier;
m_uiModifierTableIndex = m_pencodingbitsA8->data.table;
unsigned long long int ulliSelectorBits = 0;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors0 << 40;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors1 << 32;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors2 << 24;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors3 << 16;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors4 << 8;
ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors5;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
unsigned int uiShift = 45 - (3 * uiPixel);
m_auiAlphaSelectors[uiPixel] = (ulliSelectorBits >> uiShift) & (ALPHA_SELECTORS - 1);
}
// decode the alphas
// calc alpha error
m_fError = 0.0f;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
m_afDecodedAlphas[uiPixel] = DecodePixelAlpha(m_fBase, m_fMultiplier,
m_uiModifierTableIndex,
m_auiAlphaSelectors[uiPixel]);
float fDeltaAlpha = m_afDecodedAlphas[uiPixel] - m_pafrgbaSource[uiPixel].fA;
m_fError += fDeltaAlpha * fDeltaAlpha;
}
}
// redo error calc to include alpha
CalcBlockError();
}
// ----------------------------------------------------------------------------------------------------
// perform a single encoding iteration
// replace the encoding if a better encoding was found
// subsequent iterations generally take longer for each iteration
// set m_boolDone if encoding is perfect or encoding is finished based on a_fEffort
//
// similar to Block4x4Encoding_RGB8_Base::Encode_RGB8(), but with alpha added
//
void Block4x4Encoding_RGBA8::PerformIteration(float a_fEffort)
{
assert(!m_boolDone);
if (m_uiEncodingIterations == 0)
{
if (a_fEffort < 24.9f)
{
CalculateA8(0.0f);
}
else if (a_fEffort < 49.9f)
{
CalculateA8(1.0f);
}
else
{
CalculateA8(2.0f);
}
}
Block4x4Encoding_RGB8::PerformIteration(a_fEffort);
}
// ----------------------------------------------------------------------------------------------------
// find the best combination of base alpga, multiplier and selectors
//
// a_fRadius limits the range of base alpha to try
//
void Block4x4Encoding_RGBA8::CalculateA8(float a_fRadius)
{
// find min/max alpha
float fMinAlpha = 1.0f;
float fMaxAlpha = 0.0f;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
float fAlpha = m_pafrgbaSource[uiPixel].fA;
// ignore border pixels
if (isnan(fAlpha))
{
continue;
}
if (fAlpha < fMinAlpha)
{
fMinAlpha = fAlpha;
}
if (fAlpha > fMaxAlpha)
{
fMaxAlpha = fAlpha;
}
}
assert(fMinAlpha <= fMaxAlpha);
float fAlphaRange = fMaxAlpha - fMinAlpha;
// try each modifier table entry
m_fError = FLT_MAX; // artificially high value
for (unsigned int uiTableEntry = 0; uiTableEntry < MODIFIER_TABLE_ENTRYS; uiTableEntry++)
{
static const unsigned int MIN_VALUE_SELECTOR = 3;
static const unsigned int MAX_VALUE_SELECTOR = 7;
float fTableEntryCenter = -s_aafModifierTable[uiTableEntry][MIN_VALUE_SELECTOR];
float fTableEntryRange = s_aafModifierTable[uiTableEntry][MAX_VALUE_SELECTOR] -
s_aafModifierTable[uiTableEntry][MIN_VALUE_SELECTOR];
float fCenterRatio = fTableEntryCenter / fTableEntryRange;
float fCenter = fMinAlpha + fCenterRatio*fAlphaRange;
fCenter = roundf(255.0f * fCenter) / 255.0f;
float fMinBase = fCenter - (a_fRadius / 255.0f);
if (fMinBase < 0.0f)
{
fMinBase = 0.0f;
}
float fMaxBase = fCenter + (a_fRadius / 255.0f);
if (fMaxBase > 1.0f)
{
fMaxBase = 1.0f;
}
for (float fBase = fMinBase; fBase <= fMaxBase; fBase += (0.999999f / 255.0f))
{
float fRangeMultiplier = roundf(fAlphaRange / fTableEntryRange);
float fMinMultiplier = fRangeMultiplier - a_fRadius;
if (fMinMultiplier < 1.0f)
{
fMinMultiplier = 1.0f;
}
else if (fMinMultiplier > 15.0f)
{
fMinMultiplier = 15.0f;
}
float fMaxMultiplier = fRangeMultiplier + a_fRadius;
if (fMaxMultiplier < 1.0f)
{
fMaxMultiplier = 1.0f;
}
else if (fMaxMultiplier > 15.0f)
{
fMaxMultiplier = 15.0f;
}
for (float fMultiplier = fMinMultiplier; fMultiplier <= fMaxMultiplier; fMultiplier += 1.0f)
{
// find best selector for each pixel
unsigned int auiBestSelectors[PIXELS];
float afBestAlphaError[PIXELS];
float afBestDecodedAlphas[PIXELS];
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
float fBestPixelAlphaError = FLT_MAX;
for (unsigned int uiSelector = 0; uiSelector < ALPHA_SELECTORS; uiSelector++)
{
float fDecodedAlpha = DecodePixelAlpha(fBase, fMultiplier, uiTableEntry, uiSelector);
// border pixels (NAN) should have zero error
float fPixelDeltaAlpha = isnan(m_pafrgbaSource[uiPixel].fA) ?
0.0f :
fDecodedAlpha - m_pafrgbaSource[uiPixel].fA;
float fPixelAlphaError = fPixelDeltaAlpha * fPixelDeltaAlpha;
if (fPixelAlphaError < fBestPixelAlphaError)
{
fBestPixelAlphaError = fPixelAlphaError;
auiBestSelectors[uiPixel] = uiSelector;
afBestAlphaError[uiPixel] = fBestPixelAlphaError;
afBestDecodedAlphas[uiPixel] = fDecodedAlpha;
}
}
}
float fBlockError = 0.0f;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
fBlockError += afBestAlphaError[uiPixel];
}
if (fBlockError < m_fError)
{
m_fError = fBlockError;
m_fBase = fBase;
m_fMultiplier = fMultiplier;
m_uiModifierTableIndex = uiTableEntry;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
m_auiAlphaSelectors[uiPixel] = auiBestSelectors[uiPixel];
m_afDecodedAlphas[uiPixel] = afBestDecodedAlphas[uiPixel];
}
}
}
}
}
}
// ----------------------------------------------------------------------------------------------------
// set the encoding bits based on encoding state
//
void Block4x4Encoding_RGBA8::SetEncodingBits(void)
{
// set the RGB8 portion
Block4x4Encoding_RGB8::SetEncodingBits();
// set the A8 portion
{
m_pencodingbitsA8->data.base = (unsigned char)roundf(255.0f * m_fBase);
m_pencodingbitsA8->data.table = m_uiModifierTableIndex;
m_pencodingbitsA8->data.multiplier = (unsigned char)roundf(m_fMultiplier);
unsigned long long int ulliSelectorBits = 0;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
unsigned int uiShift = 45 - (3 * uiPixel);
ulliSelectorBits |= ((unsigned long long int)m_auiAlphaSelectors[uiPixel]) << uiShift;
}
m_pencodingbitsA8->data.selectors0 = ulliSelectorBits >> 40;
m_pencodingbitsA8->data.selectors1 = ulliSelectorBits >> 32;
m_pencodingbitsA8->data.selectors2 = ulliSelectorBits >> 24;
m_pencodingbitsA8->data.selectors3 = ulliSelectorBits >> 16;
m_pencodingbitsA8->data.selectors4 = ulliSelectorBits >> 8;
m_pencodingbitsA8->data.selectors5 = ulliSelectorBits;
}
}
// ####################################################################################################
// Block4x4Encoding_RGBA8_Opaque
// ####################################################################################################
// ----------------------------------------------------------------------------------------------------
// perform a single encoding iteration
// replace the encoding if a better encoding was found
// subsequent iterations generally take longer for each iteration
// set m_boolDone if encoding is perfect or encoding is finished based on a_fEffort
//
void Block4x4Encoding_RGBA8_Opaque::PerformIteration(float a_fEffort)
{
assert(!m_boolDone);
if (m_uiEncodingIterations == 0)
{
m_fError = 0.0f;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
m_afDecodedAlphas[uiPixel] = 1.0f;
}
}
Block4x4Encoding_RGB8::PerformIteration(a_fEffort);
}
// ----------------------------------------------------------------------------------------------------
// set the encoding bits based on encoding state
//
void Block4x4Encoding_RGBA8_Opaque::SetEncodingBits(void)
{
// set the RGB8 portion
Block4x4Encoding_RGB8::SetEncodingBits();
// set the A8 portion
m_pencodingbitsA8->data.base = 255;
m_pencodingbitsA8->data.table = 15;
m_pencodingbitsA8->data.multiplier = 15;
m_pencodingbitsA8->data.selectors0 = 0xFF;
m_pencodingbitsA8->data.selectors1 = 0xFF;
m_pencodingbitsA8->data.selectors2 = 0xFF;
m_pencodingbitsA8->data.selectors3 = 0xFF;
m_pencodingbitsA8->data.selectors4 = 0xFF;
m_pencodingbitsA8->data.selectors5 = 0xFF;
}
// ####################################################################################################
// Block4x4Encoding_RGBA8_Transparent
// ####################################################################################################
// ----------------------------------------------------------------------------------------------------
// perform a single encoding iteration
// replace the encoding if a better encoding was found
// subsequent iterations generally take longer for each iteration
// set m_boolDone if encoding is perfect or encoding is finished based on a_fEffort
//
void Block4x4Encoding_RGBA8_Transparent::PerformIteration(float )
{
assert(!m_boolDone);
assert(m_uiEncodingIterations == 0);
m_mode = MODE_ETC1;
m_boolDiff = true;
m_boolFlip = false;
for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
{
m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA();
m_afDecodedAlphas[uiPixel] = 0.0f;
}
m_fError = 0.0f;
m_boolDone = true;
m_uiEncodingIterations++;
}
// ----------------------------------------------------------------------------------------------------
// set the encoding bits based on encoding state
//
void Block4x4Encoding_RGBA8_Transparent::SetEncodingBits(void)
{
Block4x4Encoding_RGB8::SetEncodingBits();
// set the A8 portion
m_pencodingbitsA8->data.base = 0;
m_pencodingbitsA8->data.table = 0;
m_pencodingbitsA8->data.multiplier = 1;
m_pencodingbitsA8->data.selectors0 = 0;
m_pencodingbitsA8->data.selectors1 = 0;
m_pencodingbitsA8->data.selectors2 = 0;
m_pencodingbitsA8->data.selectors3 = 0;
m_pencodingbitsA8->data.selectors4 = 0;
m_pencodingbitsA8->data.selectors5 = 0;
}
// ----------------------------------------------------------------------------------------------------
//
}

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@ -1,121 +0,0 @@
/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcBlock4x4Encoding_RGB8.h"
namespace Etc
{
class Block4x4EncodingBits_A8;
// ################################################################################
// Block4x4Encoding_RGBA8
// RGBA8 if not completely opaque or transparent
// ################################################################################
class Block4x4Encoding_RGBA8 : public Block4x4Encoding_RGB8
{
public:
Block4x4Encoding_RGBA8(void);
virtual ~Block4x4Encoding_RGBA8(void);
virtual void InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric);
virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
virtual void PerformIteration(float a_fEffort);
virtual void SetEncodingBits(void);
protected:
static const unsigned int MODIFIER_TABLE_ENTRYS = 16;
static const unsigned int ALPHA_SELECTOR_BITS = 3;
static const unsigned int ALPHA_SELECTORS = 1 << ALPHA_SELECTOR_BITS;
static float s_aafModifierTable[MODIFIER_TABLE_ENTRYS][ALPHA_SELECTORS];
void CalculateA8(float a_fRadius);
Block4x4EncodingBits_A8 *m_pencodingbitsA8; // A8 portion of Block4x4EncodingBits_RGBA8
float m_fBase;
float m_fMultiplier;
unsigned int m_uiModifierTableIndex;
unsigned int m_auiAlphaSelectors[PIXELS];
private:
inline float DecodePixelAlpha(float a_fBase, float a_fMultiplier,
unsigned int a_uiTableIndex, unsigned int a_uiSelector)
{
float fPixelAlpha = a_fBase +
a_fMultiplier*s_aafModifierTable[a_uiTableIndex][a_uiSelector];
if (fPixelAlpha < 0.0f)
{
fPixelAlpha = 0.0f;
}
else if (fPixelAlpha > 1.0f)
{
fPixelAlpha = 1.0f;
}
return fPixelAlpha;
}
};
// ################################################################################
// Block4x4Encoding_RGBA8_Opaque
// RGBA8 if all pixels have alpha==1
// ################################################################################
class Block4x4Encoding_RGBA8_Opaque : public Block4x4Encoding_RGBA8
{
public:
virtual void PerformIteration(float a_fEffort);
virtual void SetEncodingBits(void);
};
// ################################################################################
// Block4x4Encoding_RGBA8_Transparent
// RGBA8 if all pixels have alpha==0
// ################################################################################
class Block4x4Encoding_RGBA8_Transparent : public Block4x4Encoding_RGBA8
{
public:
virtual void PerformIteration(float a_fEffort);
virtual void SetEncodingBits(void);
};
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <math.h>
namespace Etc
{
inline float LogToLinear(float a_fLog)
{
static const float ALPHA = 0.055f;
static const float ONE_PLUS_ALPHA = 1.0f + ALPHA;
if (a_fLog <= 0.04045f)
{
return a_fLog / 12.92f;
}
else
{
return powf((a_fLog + ALPHA) / ONE_PLUS_ALPHA, 2.4f);
}
}
inline float LinearToLog(float &a_fLinear)
{
static const float ALPHA = 0.055f;
static const float ONE_PLUS_ALPHA = 1.0f + ALPHA;
if (a_fLinear <= 0.0031308f)
{
return 12.92f * a_fLinear;
}
else
{
return ONE_PLUS_ALPHA * powf(a_fLinear, (1.0f/2.4f)) - ALPHA;
}
}
class ColorR8G8B8A8
{
public:
unsigned char ucR;
unsigned char ucG;
unsigned char ucB;
unsigned char ucA;
};
}

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcConfig.h"
#include "EtcColor.h"
#include <math.h>
namespace Etc
{
class ColorFloatRGBA
{
public:
ColorFloatRGBA(void)
{
fR = fG = fB = fA = 0.0f;
}
ColorFloatRGBA(float a_fR, float a_fG, float a_fB, float a_fA)
{
fR = a_fR;
fG = a_fG;
fB = a_fB;
fA = a_fA;
}
inline ColorFloatRGBA operator+(ColorFloatRGBA& a_rfrgba)
{
ColorFloatRGBA frgba;
frgba.fR = fR + a_rfrgba.fR;
frgba.fG = fG + a_rfrgba.fG;
frgba.fB = fB + a_rfrgba.fB;
frgba.fA = fA + a_rfrgba.fA;
return frgba;
}
inline ColorFloatRGBA operator+(float a_f)
{
ColorFloatRGBA frgba;
frgba.fR = fR + a_f;
frgba.fG = fG + a_f;
frgba.fB = fB + a_f;
frgba.fA = fA;
return frgba;
}
inline ColorFloatRGBA operator-(float a_f)
{
ColorFloatRGBA frgba;
frgba.fR = fR - a_f;
frgba.fG = fG - a_f;
frgba.fB = fB - a_f;
frgba.fA = fA;
return frgba;
}
inline ColorFloatRGBA operator-(ColorFloatRGBA& a_rfrgba)
{
ColorFloatRGBA frgba;
frgba.fR = fR - a_rfrgba.fR;
frgba.fG = fG - a_rfrgba.fG;
frgba.fB = fB - a_rfrgba.fB;
frgba.fA = fA - a_rfrgba.fA;
return frgba;
}
inline ColorFloatRGBA operator*(float a_f)
{
ColorFloatRGBA frgba;
frgba.fR = fR * a_f;
frgba.fG = fG * a_f;
frgba.fB = fB * a_f;
frgba.fA = fA;
return frgba;
}
inline ColorFloatRGBA ScaleRGB(float a_f)
{
ColorFloatRGBA frgba;
frgba.fR = a_f * fR;
frgba.fG = a_f * fG;
frgba.fB = a_f * fB;
frgba.fA = fA;
return frgba;
}
inline ColorFloatRGBA RoundRGB(void)
{
ColorFloatRGBA frgba;
frgba.fR = roundf(fR);
frgba.fG = roundf(fG);
frgba.fB = roundf(fB);
return frgba;
}
inline ColorFloatRGBA ToLinear()
{
ColorFloatRGBA frgbaLinear;
frgbaLinear.fR = LogToLinear(fR);
frgbaLinear.fG = LogToLinear(fG);
frgbaLinear.fB = LogToLinear(fB);
frgbaLinear.fA = fA;
return frgbaLinear;
}
inline ColorFloatRGBA ToLog(void)
{
ColorFloatRGBA frgbaLog;
frgbaLog.fR = LinearToLog(fR);
frgbaLog.fG = LinearToLog(fG);
frgbaLog.fB = LinearToLog(fB);
frgbaLog.fA = fA;
return frgbaLog;
}
inline static ColorFloatRGBA ConvertFromRGBA8(unsigned char a_ucR,
unsigned char a_ucG, unsigned char a_ucB, unsigned char a_ucA)
{
ColorFloatRGBA frgba;
frgba.fR = (float)a_ucR / 255.0f;
frgba.fG = (float)a_ucG / 255.0f;
frgba.fB = (float)a_ucB / 255.0f;
frgba.fA = (float)a_ucA / 255.0f;
return frgba;
}
inline static ColorFloatRGBA ConvertFromRGB4(unsigned char a_ucR4,
unsigned char a_ucG4,
unsigned char a_ucB4)
{
ColorFloatRGBA frgba;
unsigned char ucR8 = (unsigned char)((a_ucR4 << 4) + a_ucR4);
unsigned char ucG8 = (unsigned char)((a_ucG4 << 4) + a_ucG4);
unsigned char ucB8 = (unsigned char)((a_ucB4 << 4) + a_ucB4);
frgba.fR = (float)ucR8 / 255.0f;
frgba.fG = (float)ucG8 / 255.0f;
frgba.fB = (float)ucB8 / 255.0f;
frgba.fA = 1.0f;
return frgba;
}
inline static ColorFloatRGBA ConvertFromRGB5(unsigned char a_ucR5,
unsigned char a_ucG5,
unsigned char a_ucB5)
{
ColorFloatRGBA frgba;
unsigned char ucR8 = (unsigned char)((a_ucR5 << 3) + (a_ucR5 >> 2));
unsigned char ucG8 = (unsigned char)((a_ucG5 << 3) + (a_ucG5 >> 2));
unsigned char ucB8 = (unsigned char)((a_ucB5 << 3) + (a_ucB5 >> 2));
frgba.fR = (float)ucR8 / 255.0f;
frgba.fG = (float)ucG8 / 255.0f;
frgba.fB = (float)ucB8 / 255.0f;
frgba.fA = 1.0f;
return frgba;
}
inline static ColorFloatRGBA ConvertFromR6G7B6(unsigned char a_ucR6,
unsigned char a_ucG7,
unsigned char a_ucB6)
{
ColorFloatRGBA frgba;
unsigned char ucR8 = (unsigned char)((a_ucR6 << 2) + (a_ucR6 >> 4));
unsigned char ucG8 = (unsigned char)((a_ucG7 << 1) + (a_ucG7 >> 6));
unsigned char ucB8 = (unsigned char)((a_ucB6 << 2) + (a_ucB6 >> 4));
frgba.fR = (float)ucR8 / 255.0f;
frgba.fG = (float)ucG8 / 255.0f;
frgba.fB = (float)ucB8 / 255.0f;
frgba.fA = 1.0f;
return frgba;
}
// quantize to 4 bits, expand to 8 bits
inline ColorFloatRGBA QuantizeR4G4B4(void) const
{
ColorFloatRGBA frgba = *this;
// quantize to 4 bits
frgba = frgba.ClampRGB().ScaleRGB(15.0f).RoundRGB();
unsigned int uiR4 = (unsigned int)frgba.fR;
unsigned int uiG4 = (unsigned int)frgba.fG;
unsigned int uiB4 = (unsigned int)frgba.fB;
// expand to 8 bits
frgba.fR = (float) ((uiR4 << 4) + uiR4);
frgba.fG = (float) ((uiG4 << 4) + uiG4);
frgba.fB = (float) ((uiB4 << 4) + uiB4);
frgba = frgba.ScaleRGB(1.0f/255.0f);
return frgba;
}
// quantize to 5 bits, expand to 8 bits
inline ColorFloatRGBA QuantizeR5G5B5(void) const
{
ColorFloatRGBA frgba = *this;
// quantize to 5 bits
frgba = frgba.ClampRGB().ScaleRGB(31.0f).RoundRGB();
unsigned int uiR5 = (unsigned int)frgba.fR;
unsigned int uiG5 = (unsigned int)frgba.fG;
unsigned int uiB5 = (unsigned int)frgba.fB;
// expand to 8 bits
frgba.fR = (float)((uiR5 << 3) + (uiR5 >> 2));
frgba.fG = (float)((uiG5 << 3) + (uiG5 >> 2));
frgba.fB = (float)((uiB5 << 3) + (uiB5 >> 2));
frgba = frgba.ScaleRGB(1.0f / 255.0f);
return frgba;
}
// quantize to 6/7/6 bits, expand to 8 bits
inline ColorFloatRGBA QuantizeR6G7B6(void) const
{
ColorFloatRGBA frgba = *this;
// quantize to 6/7/6 bits
ColorFloatRGBA frgba6 = frgba.ClampRGB().ScaleRGB(63.0f).RoundRGB();
ColorFloatRGBA frgba7 = frgba.ClampRGB().ScaleRGB(127.0f).RoundRGB();
unsigned int uiR6 = (unsigned int)frgba6.fR;
unsigned int uiG7 = (unsigned int)frgba7.fG;
unsigned int uiB6 = (unsigned int)frgba6.fB;
// expand to 8 bits
frgba.fR = (float)((uiR6 << 2) + (uiR6 >> 4));
frgba.fG = (float)((uiG7 << 1) + (uiG7 >> 6));
frgba.fB = (float)((uiB6 << 2) + (uiB6 >> 4));
frgba = frgba.ScaleRGB(1.0f / 255.0f);
return frgba;
}
inline ColorFloatRGBA ClampRGB(void)
{
ColorFloatRGBA frgba = *this;
if (frgba.fR < 0.0f) { frgba.fR = 0.0f; }
if (frgba.fR > 1.0f) { frgba.fR = 1.0f; }
if (frgba.fG < 0.0f) { frgba.fG = 0.0f; }
if (frgba.fG > 1.0f) { frgba.fG = 1.0f; }
if (frgba.fB < 0.0f) { frgba.fB = 0.0f; }
if (frgba.fB > 1.0f) { frgba.fB = 1.0f; }
return frgba;
}
inline ColorFloatRGBA ClampRGBA(void)
{
ColorFloatRGBA frgba = *this;
if (frgba.fR < 0.0f) { frgba.fR = 0.0f; }
if (frgba.fR > 1.0f) { frgba.fR = 1.0f; }
if (frgba.fG < 0.0f) { frgba.fG = 0.0f; }
if (frgba.fG > 1.0f) { frgba.fG = 1.0f; }
if (frgba.fB < 0.0f) { frgba.fB = 0.0f; }
if (frgba.fB > 1.0f) { frgba.fB = 1.0f; }
if (frgba.fA < 0.0f) { frgba.fA = 0.0f; }
if (frgba.fA > 1.0f) { frgba.fA = 1.0f; }
return frgba;
}
inline int IntRed(float a_fScale)
{
return (int)roundf(fR * a_fScale);
}
inline int IntGreen(float a_fScale)
{
return (int)roundf(fG * a_fScale);
}
inline int IntBlue(float a_fScale)
{
return (int)roundf(fB * a_fScale);
}
inline int IntAlpha(float a_fScale)
{
return (int)roundf(fA * a_fScale);
}
float fR, fG, fB, fA;
};
}

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#ifdef _WIN32
#define ETC_WINDOWS (1)
#else
#define ETC_WINDOWS (0)
#endif
#if __APPLE__
#define ETC_OSX (1)
#else
#define ETC_OSX (0)
#endif
#if __unix__
#define ETC_UNIX (1)
#else
#define ETC_UNIX (0)
#endif
// short names for common types
#include <stdint.h>
typedef int8_t i8;
typedef int16_t i16;
typedef int32_t i32;
typedef int64_t i64;
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
typedef float f32;
typedef double f64;
// Keep asserts enabled in release builds during development
#undef NDEBUG
// 0=disable. stb_image can be used if you need to compress
//other image formats like jpg
#define USE_STB_IMAGE_LOAD 0
#if ETC_WINDOWS
#include <sdkddkver.h>
#define _CRT_SECURE_NO_WARNINGS (1)
#include <tchar.h>
#endif
#include <stdio.h>

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
EtcDifferentialTrys.cpp
Gathers the results of the various encoding trys for both halves of a 4x4 block for Differential mode
*/
#include "EtcConfig.h"
#include "EtcDifferentialTrys.h"
#include <assert.h>
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
// construct a list of trys (encoding attempts)
//
// a_frgbaColor1 is the basecolor for the first half
// a_frgbaColor2 is the basecolor for the second half
// a_pauiPixelMapping1 is the pixel order for the first half
// a_pauiPixelMapping2 is the pixel order for the second half
// a_uiRadius is the amount to vary the base colors
//
DifferentialTrys::DifferentialTrys(ColorFloatRGBA a_frgbaColor1, ColorFloatRGBA a_frgbaColor2,
const unsigned int *a_pauiPixelMapping1,
const unsigned int *a_pauiPixelMapping2,
unsigned int a_uiRadius,
int a_iGrayOffset1, int a_iGrayOffset2)
{
assert(a_uiRadius <= MAX_RADIUS);
m_boolSeverelyBentColors = false;
ColorFloatRGBA frgbaQuantizedColor1 = a_frgbaColor1.QuantizeR5G5B5();
ColorFloatRGBA frgbaQuantizedColor2 = a_frgbaColor2.QuantizeR5G5B5();
// quantize base colors
// ensure that trys with a_uiRadius don't overflow
int iRed1 = MoveAwayFromEdge(frgbaQuantizedColor1.IntRed(31.0f)+a_iGrayOffset1, a_uiRadius);
int iGreen1 = MoveAwayFromEdge(frgbaQuantizedColor1.IntGreen(31.0f) + a_iGrayOffset1, a_uiRadius);
int iBlue1 = MoveAwayFromEdge(frgbaQuantizedColor1.IntBlue(31.0f) + a_iGrayOffset1, a_uiRadius);
int iRed2 = MoveAwayFromEdge(frgbaQuantizedColor2.IntRed(31.0f) + a_iGrayOffset2, a_uiRadius);
int iGreen2 = MoveAwayFromEdge(frgbaQuantizedColor2.IntGreen(31.0f) + a_iGrayOffset2, a_uiRadius);
int iBlue2 = MoveAwayFromEdge(frgbaQuantizedColor2.IntBlue(31.0f) + a_iGrayOffset2, a_uiRadius);
int iDeltaRed = iRed2 - iRed1;
int iDeltaGreen = iGreen2 - iGreen1;
int iDeltaBlue = iBlue2 - iBlue1;
// make sure components are within range
{
if (iDeltaRed > 3)
{
if (iDeltaRed > 7)
{
m_boolSeverelyBentColors = true;
}
iRed1 += (iDeltaRed - 3) / 2;
iRed2 = iRed1 + 3;
iDeltaRed = 3;
}
else if (iDeltaRed < -4)
{
if (iDeltaRed < -8)
{
m_boolSeverelyBentColors = true;
}
iRed1 += (iDeltaRed + 4) / 2;
iRed2 = iRed1 - 4;
iDeltaRed = -4;
}
assert(iRed1 >= (signed)(0 + a_uiRadius) && iRed1 <= (signed)(31 - a_uiRadius));
assert(iRed2 >= (signed)(0 + a_uiRadius) && iRed2 <= (signed)(31 - a_uiRadius));
assert(iDeltaRed >= -4 && iDeltaRed <= 3);
if (iDeltaGreen > 3)
{
if (iDeltaGreen > 7)
{
m_boolSeverelyBentColors = true;
}
iGreen1 += (iDeltaGreen - 3) / 2;
iGreen2 = iGreen1 + 3;
iDeltaGreen = 3;
}
else if (iDeltaGreen < -4)
{
if (iDeltaGreen < -8)
{
m_boolSeverelyBentColors = true;
}
iGreen1 += (iDeltaGreen + 4) / 2;
iGreen2 = iGreen1 - 4;
iDeltaGreen = -4;
}
assert(iGreen1 >= (signed)(0 + a_uiRadius) && iGreen1 <= (signed)(31 - a_uiRadius));
assert(iGreen2 >= (signed)(0 + a_uiRadius) && iGreen2 <= (signed)(31 - a_uiRadius));
assert(iDeltaGreen >= -4 && iDeltaGreen <= 3);
if (iDeltaBlue > 3)
{
if (iDeltaBlue > 7)
{
m_boolSeverelyBentColors = true;
}
iBlue1 += (iDeltaBlue - 3) / 2;
iBlue2 = iBlue1 + 3;
iDeltaBlue = 3;
}
else if (iDeltaBlue < -4)
{
if (iDeltaBlue < -8)
{
m_boolSeverelyBentColors = true;
}
iBlue1 += (iDeltaBlue + 4) / 2;
iBlue2 = iBlue1 - 4;
iDeltaBlue = -4;
}
assert(iBlue1 >= (signed)(0+a_uiRadius) && iBlue1 <= (signed)(31 - a_uiRadius));
assert(iBlue2 >= (signed)(0 + a_uiRadius) && iBlue2 <= (signed)(31 - a_uiRadius));
assert(iDeltaBlue >= -4 && iDeltaBlue <= 3);
}
m_half1.Init(iRed1, iGreen1, iBlue1, a_pauiPixelMapping1, a_uiRadius);
m_half2.Init(iRed2, iGreen2, iBlue2, a_pauiPixelMapping2, a_uiRadius);
}
// ----------------------------------------------------------------------------------------------------
//
void DifferentialTrys::Half::Init(int a_iRed, int a_iGreen, int a_iBlue,
const unsigned int *a_pauiPixelMapping, unsigned int a_uiRadius)
{
m_iRed = a_iRed;
m_iGreen = a_iGreen;
m_iBlue = a_iBlue;
m_pauiPixelMapping = a_pauiPixelMapping;
m_uiRadius = a_uiRadius;
m_uiTrys = 0;
}
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcColorFloatRGBA.h"
namespace Etc
{
class DifferentialTrys
{
public:
static const unsigned int MAX_RADIUS = 2;
DifferentialTrys(ColorFloatRGBA a_frgbaColor1,
ColorFloatRGBA a_frgbaColor2,
const unsigned int *a_pauiPixelMapping1,
const unsigned int *a_pauiPixelMapping2,
unsigned int a_uiRadius,
int a_iGrayOffset1, int a_iGrayOffset2);
inline static int MoveAwayFromEdge(int a_i, int a_iDistance)
{
if (a_i < (0+ a_iDistance))
{
return (0 + a_iDistance);
}
else if (a_i > (31- a_iDistance))
{
return (31 - a_iDistance);
}
return a_i;
}
class Try
{
public :
static const unsigned int SELECTORS = 8; // per half
int m_iRed;
int m_iGreen;
int m_iBlue;
unsigned int m_uiCW;
unsigned int m_auiSelectors[SELECTORS];
float m_fError;
};
class Half
{
public:
static const unsigned int MAX_TRYS = 125;
void Init(int a_iRed, int a_iGreen, int a_iBlue,
const unsigned int *a_pauiPixelMapping,
unsigned int a_uiRadius);
// center of trys
int m_iRed;
int m_iGreen;
int m_iBlue;
const unsigned int *m_pauiPixelMapping;
unsigned int m_uiRadius;
unsigned int m_uiTrys;
Try m_atry[MAX_TRYS];
Try *m_ptryBest;
};
Half m_half1;
Half m_half2;
bool m_boolSeverelyBentColors;
};
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
namespace Etc
{
enum ErrorMetric
{
RGBA,
RGBX,
REC709,
NUMERIC,
NORMALXYZ,
//
ERROR_METRICS,
//
BT709 = REC709
};
inline const char *ErrorMetricToString(ErrorMetric errorMetric)
{
switch (errorMetric)
{
case RGBA:
return "RGBA";
case RGBX:
return "RGBX";
case REC709:
return "REC709";
case NUMERIC:
return "NUMERIC";
case NORMALXYZ:
return "NORMALXYZ";
case ERROR_METRICS:
default:
return "UNKNOWN";
}
}
} // namespace Etc

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@ -1,390 +0,0 @@
/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef _WIN32
#define _CRT_SECURE_NO_WARNINGS (1)
#endif
#include "EtcConfig.h"
#include "EtcFile.h"
#include "EtcFileHeader.h"
#include "EtcColor.h"
#include "Etc.h"
#include "EtcBlock4x4EncodingBits.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
using namespace Etc;
// ----------------------------------------------------------------------------------------------------
//
File::File(const char *a_pstrFilename, Format a_fileformat, Image::Format a_imageformat,
unsigned char *a_paucEncodingBits, unsigned int a_uiEncodingBitsBytes,
unsigned int a_uiSourceWidth, unsigned int a_uiSourceHeight,
unsigned int a_uiExtendedWidth, unsigned int a_uiExtendedHeight)
{
if (a_pstrFilename == nullptr)
{
m_pstrFilename = const_cast<char *>("");
}
else
{
m_pstrFilename = new char[strlen(a_pstrFilename) + 1];
strcpy(m_pstrFilename, a_pstrFilename);
}
m_fileformat = a_fileformat;
if (m_fileformat == Format::INFER_FROM_FILE_EXTENSION)
{
// ***** TODO: add this later *****
m_fileformat = Format::KTX;
}
m_imageformat = a_imageformat;
m_uiNumMipmaps = 1;
m_pMipmapImages = new RawImage[m_uiNumMipmaps];
m_pMipmapImages[0].paucEncodingBits = std::shared_ptr<unsigned char>(a_paucEncodingBits, [](unsigned char *p) { delete[] p; } );
m_pMipmapImages[0].uiEncodingBitsBytes = a_uiEncodingBitsBytes;
m_pMipmapImages[0].uiExtendedWidth = a_uiExtendedWidth;
m_pMipmapImages[0].uiExtendedHeight = a_uiExtendedHeight;
m_uiSourceWidth = a_uiSourceWidth;
m_uiSourceHeight = a_uiSourceHeight;
switch (m_fileformat)
{
case Format::PKM:
m_pheader = new FileHeader_Pkm(this);
break;
case Format::KTX:
m_pheader = new FileHeader_Ktx(this);
break;
default:
assert(0);
break;
}
}
// ----------------------------------------------------------------------------------------------------
//
File::File(const char *a_pstrFilename, Format a_fileformat, Image::Format a_imageformat,
unsigned int a_uiNumMipmaps, RawImage *a_pMipmapImages,
unsigned int a_uiSourceWidth, unsigned int a_uiSourceHeight)
{
if (a_pstrFilename == nullptr)
{
m_pstrFilename = const_cast<char *>("");
}
else
{
m_pstrFilename = new char[strlen(a_pstrFilename) + 1];
strcpy(m_pstrFilename, a_pstrFilename);
}
m_fileformat = a_fileformat;
if (m_fileformat == Format::INFER_FROM_FILE_EXTENSION)
{
// ***** TODO: add this later *****
m_fileformat = Format::KTX;
}
m_imageformat = a_imageformat;
m_uiNumMipmaps = a_uiNumMipmaps;
m_pMipmapImages = new RawImage[m_uiNumMipmaps];
for(unsigned int mip = 0; mip < m_uiNumMipmaps; mip++)
{
m_pMipmapImages[mip] = a_pMipmapImages[mip];
}
m_uiSourceWidth = a_uiSourceWidth;
m_uiSourceHeight = a_uiSourceHeight;
switch (m_fileformat)
{
case Format::PKM:
m_pheader = new FileHeader_Pkm(this);
break;
case Format::KTX:
m_pheader = new FileHeader_Ktx(this);
break;
default:
assert(0);
break;
}
}
// ----------------------------------------------------------------------------------------------------
//
File::File(const char *a_pstrFilename, Format a_fileformat)
{
if (a_pstrFilename == nullptr)
{
return;
}
else
{
m_pstrFilename = new char[strlen(a_pstrFilename) + 1];
strcpy(m_pstrFilename, a_pstrFilename);
}
m_fileformat = a_fileformat;
if (m_fileformat == Format::INFER_FROM_FILE_EXTENSION)
{
// ***** TODO: add this later *****
m_fileformat = Format::KTX;
}
FILE *pfile = fopen(m_pstrFilename, "rb");
if (pfile == nullptr)
{
printf("ERROR: Couldn't open %s", m_pstrFilename);
exit(1);
}
fseek(pfile, 0, SEEK_END);
unsigned int fileSize = ftell(pfile);
fseek(pfile, 0, SEEK_SET);
size_t szResult;
m_pheader = new FileHeader_Ktx(this);
szResult = fread( ((FileHeader_Ktx*)m_pheader)->GetData(), 1, sizeof(FileHeader_Ktx::Data), pfile);
assert(szResult > 0);
m_uiNumMipmaps = 1;
m_pMipmapImages = new RawImage[m_uiNumMipmaps];
if (((FileHeader_Ktx*)m_pheader)->GetData()->m_u32BytesOfKeyValueData > 0)
fseek(pfile, ((FileHeader_Ktx*)m_pheader)->GetData()->m_u32BytesOfKeyValueData, SEEK_CUR);
szResult = fread(&m_pMipmapImages->uiEncodingBitsBytes, 1, sizeof(unsigned int), pfile);
assert(szResult > 0);
m_pMipmapImages->paucEncodingBits = std::shared_ptr<unsigned char>(new unsigned char[m_pMipmapImages->uiEncodingBitsBytes], [](unsigned char *p) { delete[] p; } );
assert(ftell(pfile) + m_pMipmapImages->uiEncodingBitsBytes <= fileSize);
szResult = fread(m_pMipmapImages->paucEncodingBits.get(), 1, m_pMipmapImages->uiEncodingBitsBytes, pfile);
assert(szResult == m_pMipmapImages->uiEncodingBitsBytes);
uint32_t uiInternalFormat = ((FileHeader_Ktx*)m_pheader)->GetData()->m_u32GlInternalFormat;
uint32_t uiBaseInternalFormat = ((FileHeader_Ktx*)m_pheader)->GetData()->m_u32GlBaseInternalFormat;
if (uiInternalFormat == (uint32_t)FileHeader_Ktx::InternalFormat::ETC1_RGB8 && uiBaseInternalFormat == (uint32_t)FileHeader_Ktx::BaseInternalFormat::ETC1_RGB8)
{
m_imageformat = Image::Format::ETC1;
}
else if (uiInternalFormat == (uint32_t)FileHeader_Ktx::InternalFormat::ETC2_RGB8 && uiBaseInternalFormat == (uint32_t)FileHeader_Ktx::BaseInternalFormat::ETC2_RGB8)
{
m_imageformat = Image::Format::RGB8;
}
else if (uiInternalFormat == (uint32_t)FileHeader_Ktx::InternalFormat::ETC2_RGB8A1 && uiBaseInternalFormat == (uint32_t)FileHeader_Ktx::BaseInternalFormat::ETC2_RGB8A1)
{
m_imageformat = Image::Format::RGB8A1;
}
else if (uiInternalFormat == (uint32_t)FileHeader_Ktx::InternalFormat::ETC2_RGBA8 && uiBaseInternalFormat == (uint32_t)FileHeader_Ktx::BaseInternalFormat::ETC2_RGBA8)
{
m_imageformat = Image::Format::RGBA8;
}
else if (uiInternalFormat == (uint32_t)FileHeader_Ktx::InternalFormat::ETC2_R11 && uiBaseInternalFormat == (uint32_t)FileHeader_Ktx::BaseInternalFormat::ETC2_R11)
{
m_imageformat = Image::Format::R11;
}
else if (uiInternalFormat == (uint32_t)FileHeader_Ktx::InternalFormat::ETC2_SIGNED_R11 && uiBaseInternalFormat == (uint32_t)FileHeader_Ktx::BaseInternalFormat::ETC2_R11)
{
m_imageformat = Image::Format::SIGNED_R11;
}
else if (uiInternalFormat == (uint32_t)FileHeader_Ktx::InternalFormat::ETC2_RG11 && uiBaseInternalFormat == (uint32_t)FileHeader_Ktx::BaseInternalFormat::ETC2_RG11)
{
m_imageformat = Image::Format::RG11;
}
else if (uiInternalFormat == (uint32_t)FileHeader_Ktx::InternalFormat::ETC2_SIGNED_RG11 && uiBaseInternalFormat == (uint32_t)FileHeader_Ktx::BaseInternalFormat::ETC2_RG11)
{
m_imageformat = Image::Format::SIGNED_RG11;
}
else
{
m_imageformat = Image::Format::UNKNOWN;
}
m_uiSourceWidth = ((FileHeader_Ktx*)m_pheader)->GetData()->m_u32PixelWidth;
m_uiSourceHeight = ((FileHeader_Ktx*)m_pheader)->GetData()->m_u32PixelHeight;
m_pMipmapImages->uiExtendedWidth = Image::CalcExtendedDimension((unsigned short)m_uiSourceWidth);
m_pMipmapImages->uiExtendedHeight = Image::CalcExtendedDimension((unsigned short)m_uiSourceHeight);
unsigned int uiBlocks = m_pMipmapImages->uiExtendedWidth * m_pMipmapImages->uiExtendedHeight / 16;
Block4x4EncodingBits::Format encodingbitsformat = Image::DetermineEncodingBitsFormat(m_imageformat);
unsigned int expectedbytes = uiBlocks * Block4x4EncodingBits::GetBytesPerBlock(encodingbitsformat);
assert(expectedbytes == m_pMipmapImages->uiEncodingBitsBytes);
fclose(pfile);
}
File::~File()
{
if (m_pMipmapImages != nullptr)
{
delete [] m_pMipmapImages;
}
if(m_pstrFilename != nullptr)
{
delete[] m_pstrFilename;
m_pstrFilename = nullptr;
}
if (m_pheader != nullptr)
{
delete m_pheader;
m_pheader = nullptr;
}
}
void File::UseSingleBlock(int a_iPixelX, int a_iPixelY)
{
if (a_iPixelX <= -1 || a_iPixelY <= -1)
return;
if (a_iPixelX >(int) m_uiSourceWidth)
{
//if we are using a ktx thats the size of a single block or less
//then make sure we use the 4x4 image as the single block
if (m_uiSourceWidth <= 4)
{
a_iPixelX = 0;
}
else
{
printf("blockAtHV: H coordinate out of range, capped to image width\n");
a_iPixelX = m_uiSourceWidth - 1;
}
}
if (a_iPixelY >(int) m_uiSourceHeight)
{
//if we are using a ktx thats the size of a single block or less
//then make sure we use the 4x4 image as the single block
if (m_uiSourceHeight <= 4)
{
a_iPixelY= 0;
}
else
{
printf("blockAtHV: V coordinate out of range, capped to image height\n");
a_iPixelY = m_uiSourceHeight - 1;
}
}
unsigned int origWidth = m_uiSourceWidth;
unsigned int origHeight = m_uiSourceHeight;
m_uiSourceWidth = 4;
m_uiSourceHeight = 4;
Block4x4EncodingBits::Format encodingbitsformat = Image::DetermineEncodingBitsFormat(m_imageformat);
unsigned int uiEncodingBitsBytesPerBlock = Block4x4EncodingBits::GetBytesPerBlock(encodingbitsformat);
int numMipmaps = 1;
RawImage* pMipmapImages = new RawImage[numMipmaps];
pMipmapImages[0].uiExtendedWidth = Image::CalcExtendedDimension((unsigned short)m_uiSourceWidth);
pMipmapImages[0].uiExtendedHeight = Image::CalcExtendedDimension((unsigned short)m_uiSourceHeight);
pMipmapImages[0].uiEncodingBitsBytes = 0;
pMipmapImages[0].paucEncodingBits = std::shared_ptr<unsigned char>(new unsigned char[uiEncodingBitsBytesPerBlock], [](unsigned char *p) { delete[] p; });
//block position in pixels
// remove the bottom 2 bits to get the block coordinates
unsigned int iBlockPosX = (a_iPixelX & 0xFFFFFFFC);
unsigned int iBlockPosY = (a_iPixelY & 0xFFFFFFFC);
int numXBlocks = (origWidth / 4);
int numYBlocks = (origHeight / 4);
// block location
//int iBlockX = (a_iPixelX % 4) == 0 ? a_iPixelX / 4.0f : (a_iPixelX / 4) + 1;
//int iBlockY = (a_iPixelY % 4) == 0 ? a_iPixelY / 4.0f : (a_iPixelY / 4) + 1;
//m_paucEncodingBits += ((iBlockY * numXBlocks) + iBlockX) * uiEncodingBitsBytesPerBlock;
unsigned int num = numXBlocks*numYBlocks;
unsigned int uiH = 0, uiV = 0;
unsigned char* pEncodingBits = m_pMipmapImages[0].paucEncodingBits.get();
for (unsigned int uiBlock = 0; uiBlock < num; uiBlock++)
{
if (uiH == iBlockPosX && uiV == iBlockPosY)
{
memcpy(pMipmapImages[0].paucEncodingBits.get(),pEncodingBits, uiEncodingBitsBytesPerBlock);
break;
}
pEncodingBits += uiEncodingBitsBytesPerBlock;
uiH += 4;
if (uiH >= origWidth)
{
uiH = 0;
uiV += 4;
}
}
delete [] m_pMipmapImages;
m_pMipmapImages = pMipmapImages;
}
// ----------------------------------------------------------------------------------------------------
//
void File::Write()
{
FILE *pfile = fopen(m_pstrFilename, "wb");
if (pfile == nullptr)
{
printf("Error: couldn't open Etc file (%s)\n", m_pstrFilename);
exit(1);
}
m_pheader->Write(pfile);
for(unsigned int mip = 0; mip < m_uiNumMipmaps; mip++)
{
if(m_fileformat == Format::KTX)
{
// Write u32 image size
uint32_t u32ImageSize = m_pMipmapImages[mip].uiEncodingBitsBytes;
uint32_t szBytesWritten = fwrite(&u32ImageSize, 1, sizeof(u32ImageSize), pfile);
assert(szBytesWritten == sizeof(u32ImageSize));
}
unsigned int iResult = (int)fwrite(m_pMipmapImages[mip].paucEncodingBits.get(), 1, m_pMipmapImages[mip].uiEncodingBitsBytes, pfile);
if (iResult != m_pMipmapImages[mip].uiEncodingBitsBytes)
{
printf("Error: couldn't write Etc file (%s)\n", m_pstrFilename);
exit(1);
}
}
fclose(pfile);
}
// ----------------------------------------------------------------------------------------------------
//

136
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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcColorFloatRGBA.h"
#include "EtcImage.h"
#include "Etc.h"
namespace Etc
{
class FileHeader;
class SourceImage;
class File
{
public:
enum class Format
{
INFER_FROM_FILE_EXTENSION,
PKM,
KTX,
};
File(const char *a_pstrFilename, Format a_fileformat, Image::Format a_imageformat,
unsigned char *a_paucEncodingBits, unsigned int a_uiEncodingBitsBytes,
unsigned int a_uiSourceWidth, unsigned int a_uiSourceHeight,
unsigned int a_uiExtendedWidth, unsigned int a_uiExtendedHeight);
File(const char *a_pstrFilename, Format a_fileformat, Image::Format a_imageformat,
unsigned int a_uiNumMipmaps, RawImage *pMipmapImages,
unsigned int a_uiSourceWidth, unsigned int a_uiSourceHeight );
File(const char *a_pstrFilename, Format a_fileformat);
~File();
const char *GetFilename(void) { return m_pstrFilename; }
void Read(const char *a_pstrFilename);
void Write(void);
inline unsigned int GetSourceWidth(void)
{
return m_uiSourceWidth;
}
inline unsigned int GetSourceHeight(void)
{
return m_uiSourceHeight;
}
inline unsigned int GetExtendedWidth(unsigned int mipmapIndex = 0)
{
if (mipmapIndex < m_uiNumMipmaps)
{
return m_pMipmapImages[mipmapIndex].uiExtendedWidth;
}
else
{
return 0;
}
}
inline unsigned int GetExtendedHeight(unsigned int mipmapIndex = 0)
{
if (mipmapIndex < m_uiNumMipmaps)
{
return m_pMipmapImages[mipmapIndex].uiExtendedHeight;
}
else
{
return 0;
}
}
inline Image::Format GetImageFormat()
{
return m_imageformat;
}
inline unsigned int GetEncodingBitsBytes(unsigned int mipmapIndex = 0)
{
if (mipmapIndex < m_uiNumMipmaps)
{
return m_pMipmapImages[mipmapIndex].uiEncodingBitsBytes;
}
else
{
return 0;
}
}
inline unsigned char* GetEncodingBits(unsigned int mipmapIndex = 0)
{
if( mipmapIndex < m_uiNumMipmaps)
{
return m_pMipmapImages[mipmapIndex].paucEncodingBits.get();
}
else
{
return nullptr;
}
}
inline unsigned int GetNumMipmaps()
{
return m_uiNumMipmaps;
}
void UseSingleBlock(int a_iPixelX = -1, int a_iPixelY = -1);
private:
char *m_pstrFilename; // includes directory path and file extension
Format m_fileformat;
Image::Format m_imageformat;
FileHeader *m_pheader;
unsigned int m_uiNumMipmaps;
RawImage* m_pMipmapImages;
unsigned int m_uiSourceWidth;
unsigned int m_uiSourceHeight;
};
}

185
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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "EtcFileHeader.h"
#include "EtcBlock4x4EncodingBits.h"
#include <assert.h>
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
//
FileHeader_Pkm::FileHeader_Pkm(File *a_pfile)
{
m_pfile = a_pfile;
static const char s_acMagicNumberData[4] = { 'P', 'K', 'M', ' ' };
static const char s_acVersionData[2] = { '1', '0' };
for (unsigned int ui = 0; ui < sizeof(s_acMagicNumberData); ui++)
{
m_data.m_acMagicNumber[ui] = s_acMagicNumberData[ui];
}
for (unsigned int ui = 0; ui < sizeof(s_acVersionData); ui++)
{
m_data.m_acVersion[ui] = s_acVersionData[ui];
}
m_data.m_ucDataType_msb = 0; // ETC1_RGB_NO_MIPMAPS
m_data.m_ucDataType_lsb = 0;
m_data.m_ucOriginalWidth_msb = (unsigned char)(m_pfile->GetSourceWidth() >> 8);
m_data.m_ucOriginalWidth_lsb = m_pfile->GetSourceWidth() & 0xFF;
m_data.m_ucOriginalHeight_msb = (unsigned char)(m_pfile->GetSourceHeight() >> 8);
m_data.m_ucOriginalHeight_lsb = m_pfile->GetSourceHeight() & 0xFF;
m_data.m_ucExtendedWidth_msb = (unsigned char)(m_pfile->GetExtendedWidth() >> 8);
m_data.m_ucExtendedWidth_lsb = m_pfile->GetExtendedWidth() & 0xFF;
m_data.m_ucExtendedHeight_msb = (unsigned char)(m_pfile->GetExtendedHeight() >> 8);
m_data.m_ucExtendedHeight_lsb = m_pfile->GetExtendedHeight() & 0xFF;
}
// ----------------------------------------------------------------------------------------------------
//
void FileHeader_Pkm::Write(FILE *a_pfile)
{
fwrite(&m_data, sizeof(Data), 1, a_pfile);
}
// ----------------------------------------------------------------------------------------------------
//
FileHeader_Ktx::FileHeader_Ktx(File *a_pfile)
{
m_pfile = a_pfile;
static const uint8_t s_au8Itentfier[12] =
{
0xAB, 0x4B, 0x54, 0x58, // first four bytes of Byte[12] identifier
0x20, 0x31, 0x31, 0xBB, // next four bytes of Byte[12] identifier
0x0D, 0x0A, 0x1A, 0x0A // final four bytes of Byte[12] identifier
};
for (unsigned int ui = 0; ui < sizeof(s_au8Itentfier); ui++)
{
m_data.m_au8Identifier[ui] = s_au8Itentfier[ui];
}
m_data.m_u32Endianness = 0x04030201;
m_data.m_u32GlType = 0;
m_data.m_u32GlTypeSize = 1;
m_data.m_u32GlFormat = 0;
switch (m_pfile->GetImageFormat())
{
case Image::Format::RGB8:
case Image::Format::SRGB8:
m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_RGB8;
m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RGB8;
break;
case Image::Format::RGBA8:
case Image::Format::SRGBA8:
m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_RGBA8;
m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RGBA8;
break;
case Image::Format::RGB8A1:
case Image::Format::SRGB8A1:
m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_RGB8A1;
m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RGB8A1;
break;
case Image::Format::R11:
m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_R11;
m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_R11;
break;
case Image::Format::SIGNED_R11:
m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_SIGNED_R11;
m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_R11;
break;
case Image::Format::RG11:
m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_RG11;
m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RG11;
break;
case Image::Format::SIGNED_RG11:
m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_SIGNED_RG11;
m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RG11;
break;
default:
m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC1_RGB8;
m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC1_RGB8;
break;
}
m_data.m_u32PixelWidth = 0;
m_data.m_u32PixelHeight = 0;
m_data.m_u32PixelDepth = 0;
m_data.m_u32NumberOfArrayElements = 0;
m_data.m_u32NumberOfFaces = 0;
m_data.m_u32BytesOfKeyValueData = 0;
m_pkeyvaluepair = nullptr;
m_u32Images = 0;
m_u32KeyValuePairs = 0;
m_data.m_u32PixelWidth = m_pfile->GetSourceWidth();
m_data.m_u32PixelHeight = m_pfile->GetSourceHeight();
m_data.m_u32PixelDepth = 0;
m_data.m_u32NumberOfArrayElements = 0;
m_data.m_u32NumberOfFaces = 1;
m_data.m_u32NumberOfMipmapLevels = m_pfile->GetNumMipmaps();
}
// ----------------------------------------------------------------------------------------------------
//
void FileHeader_Ktx::Write(FILE *a_pfile)
{
size_t szBytesWritten;
// Write header
szBytesWritten = fwrite(&m_data, 1, sizeof(Data), a_pfile);
assert(szBytesWritten == sizeof(Data));
// Write KeyAndValuePairs
if (m_u32KeyValuePairs)
{
fwrite(m_pkeyvaluepair, m_pkeyvaluepair->u32KeyAndValueByteSize, 1, a_pfile);
}
}
// ----------------------------------------------------------------------------------------------------
//
FileHeader_Ktx::Data *FileHeader_Ktx::GetData()
{
return &m_data;
}
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcFile.h"
#include <stdio.h>
#include <inttypes.h>
namespace Etc
{
class Image;
class FileHeader
{
public:
virtual void Write(FILE *a_pfile) = 0;
File GetFile();
virtual ~FileHeader(void) {}
protected:
File *m_pfile;
};
// ----------------------------------------------------------------------------------------------------
//
class FileHeader_Pkm : public FileHeader
{
public:
FileHeader_Pkm(File *a_pfile);
virtual void Write(FILE *a_pfile);
virtual ~FileHeader_Pkm(void) {}
private:
typedef struct
{
char m_acMagicNumber[4];
char m_acVersion[2];
unsigned char m_ucDataType_msb; // e.g. ETC1_RGB_NO_MIPMAPS
unsigned char m_ucDataType_lsb;
unsigned char m_ucExtendedWidth_msb; // padded to 4x4 blocks
unsigned char m_ucExtendedWidth_lsb;
unsigned char m_ucExtendedHeight_msb; // padded to 4x4 blocks
unsigned char m_ucExtendedHeight_lsb;
unsigned char m_ucOriginalWidth_msb;
unsigned char m_ucOriginalWidth_lsb;
unsigned char m_ucOriginalHeight_msb;
unsigned char m_ucOriginalHeight_lsb;
} Data;
Data m_data;
};
// ----------------------------------------------------------------------------------------------------
//
class FileHeader_Ktx : public FileHeader
{
public:
typedef struct
{
uint32_t u32KeyAndValueByteSize;
} KeyValuePair;
typedef struct
{
uint8_t m_au8Identifier[12];
uint32_t m_u32Endianness;
uint32_t m_u32GlType;
uint32_t m_u32GlTypeSize;
uint32_t m_u32GlFormat;
uint32_t m_u32GlInternalFormat;
uint32_t m_u32GlBaseInternalFormat;
uint32_t m_u32PixelWidth;
uint32_t m_u32PixelHeight;
uint32_t m_u32PixelDepth;
uint32_t m_u32NumberOfArrayElements;
uint32_t m_u32NumberOfFaces;
uint32_t m_u32NumberOfMipmapLevels;
uint32_t m_u32BytesOfKeyValueData;
} Data;
enum class InternalFormat
{
ETC1_RGB8 = 0x8D64,
ETC1_ALPHA8 = ETC1_RGB8,
//
ETC2_R11 = 0x9270,
ETC2_SIGNED_R11 = 0x9271,
ETC2_RG11 = 0x9272,
ETC2_SIGNED_RG11 = 0x9273,
ETC2_RGB8 = 0x9274,
ETC2_SRGB8 = 0x9275,
ETC2_RGB8A1 = 0x9276,
ETC2_SRGB8_PUNCHTHROUGH_ALPHA1 = 0x9277,
ETC2_RGBA8 = 0x9278
};
enum class BaseInternalFormat
{
ETC2_R11 = 0x1903,
ETC2_RG11 = 0x8227,
ETC1_RGB8 = 0x1907,
ETC1_ALPHA8 = ETC1_RGB8,
//
ETC2_RGB8 = 0x1907,
ETC2_RGB8A1 = 0x1908,
ETC2_RGBA8 = 0x1908,
};
FileHeader_Ktx(File *a_pfile);
virtual void Write(FILE *a_pfile);
virtual ~FileHeader_Ktx(void) {}
void AddKeyAndValue(KeyValuePair *a_pkeyvaluepair);
Data* GetData();
private:
Data m_data;
KeyValuePair *m_pkeyvaluepair;
uint32_t m_u32Images;
uint32_t m_u32KeyValuePairs;
};
} // namespace Etc

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@ -1,404 +0,0 @@
#include <stdlib.h>
#include <math.h>
#include "EtcFilter.h"
namespace Etc
{
static const double PiConst = 3.14159265358979323846;
inline double sinc(double x)
{
if ( x == 0.0 )
{
return 1.0;
}
return sin(PiConst * x) / (PiConst * x);
}
//inline float sincf( float x )
//{
// x *= F_PI;
// if (x < 0.01f && x > -0.01f)
// {
// return 1.0f + x*x*(-1.0f/6.0f + x*x*1.0f/120.0f);
// }
//
// return sinf(x)/x;
//}
//
//double bessel0(double x)
//{
// const double EPSILON_RATIO = 1E-16;
// double xh, sum, pow, ds;
// int k;
//
// xh = 0.5 * x;
// sum = 1.0;
// pow = 1.0;
// k = 0;
// ds = 1.0;
// while (ds > sum * EPSILON_RATIO)
// {
// ++k;
// pow = pow * (xh / k);
// ds = pow * pow;
// sum = sum + ds;
// }
//
// return sum;
//}
//**--------------------------------------------------------------------------
//** Name: kaiser(double alpha, double half_width, double x)
//** Returns:
//** Description: Alpha controls shape of filter. We are using 4.
//**--------------------------------------------------------------------------
//inline double kaiser(double alpha, double half_width, double x)
//{
// double ratio = (x / half_width);
// return bessel0(alpha * sqrt(1 - ratio * ratio)) / bessel0(alpha);
//}
//
//float Filter_Lanczos4Sinc(float x)
//{
// if (x <= -4.0f || x >= 4.0f) // half-width of 4
// {
// return 0.0;
// }
//
// return sinc(0.875f * x) * sinc(0.25f * x);
//}
//
//double Filter_Kaiser4( double t )
//{
// return kaiser( 4.0, 3.0, t);
//}
//
//double Filter_KaiserOptimal( double t )
//{
// return kaiser( 8.93, 3.0f, t);
//}
double FilterLanczos3( double t )
{
if ( t <= -3.0 || t >= 3.0 )
{
return 0.0;
}
return sinc( t ) * sinc( t / 3.0 );
}
double FilterBox( double t )
{
return ( t > -0.5 && t < 0.5) ? 1.0 : 0.0;
}
double FilterLinear( double t )
{
if (t < 0.0) t = -t;
return (t < 1.0) ? (1.0 - t) : 0.0;
}
//**--------------------------------------------------------------------------
//** Name: CalcContributions( int srcSize,
//** int destSize,
//** double filterSize,
//** bool wrap,
//** double (*FilterProc)(double),
//** FilterWeights contrib[] )
//** Returns: void
//** Description:
//**--------------------------------------------------------------------------
void CalcContributions( int srcSize, int destSize, double filterSize, bool wrap, double (*FilterProc)(double), FilterWeights contrib[] )
{
double scale;
double filterScale;
double center;
double totalWeight;
double weight;
int iRight;
int iLeft;
int iDest;
scale = (double)destSize / srcSize;
if ( scale < 1.0 )
{
filterSize = filterSize / scale;
filterScale = scale;
}
else
{
filterScale = 1.0;
}
if ( filterSize > (double)MaxFilterSize )
{
filterSize = (double)MaxFilterSize;
}
for ( iDest = 0; iDest < destSize; ++iDest )
{
center = (double)iDest / scale;
iLeft = (int)ceil(center - filterSize);
iRight = (int)floor(center + filterSize);
if ( !wrap )
{
if ( iLeft < 0 )
{
iLeft = 0;
}
if ( iRight >= srcSize )
{
iRight = srcSize - 1;
}
}
int numWeights = iRight - iLeft + 1;
contrib[iDest].first = iLeft;
contrib[iDest].numWeights = numWeights;
totalWeight = 0;
double t = ((double)iLeft - center) * filterScale;
for (int i = 0; i < numWeights; i++)
{
weight = (*FilterProc)(t) * filterScale;
totalWeight += weight;
contrib[iDest].weight[i] = weight;
t += filterScale;
}
//**--------------------------------------------------------
//** Normalize weights by dividing by the sum of the weights
//**--------------------------------------------------------
if ( totalWeight > 0.0 )
{
for ( int i = 0; i < numWeights; i++)
{
contrib[iDest].weight[i] /= totalWeight;
}
}
}
}
//**-------------------------------------------------------------------------
//** Name: Filter_TwoPass( RGBCOLOR *pSrcImage,
//** int srcWidth, int srcHeight,
//** RGBCOLOR *pDestImage,
//** int destWidth, int destHeight,
//** double (*FilterProc)(double) )
//** Returns: 0 on failure and 1 on success
//** Description: Filters a 2d image with a two pass filter by averaging the
//** weighted contributions of the pixels within the filter region. The
//** contributions are determined by a weighting function parameter.
//**-------------------------------------------------------------------------
int FilterTwoPass( RGBCOLOR *pSrcImage, int srcWidth, int srcHeight,
RGBCOLOR *pDestImage, int destWidth, int destHeight, unsigned int wrapFlags, double (*FilterProc)(double) )
{
FilterWeights *contrib;
RGBCOLOR *pPixel;
RGBCOLOR *pSrcPixel;
RGBCOLOR *pTempImage;
int iRow;
int iCol;
int iSrcCol;
int iSrcRow;
int iWeight;
double dRed;
double dGreen;
double dBlue;
double dAlpha;
double filterSize = 3.0;
int maxDim = (srcWidth>srcHeight)?srcWidth:srcHeight;
contrib = (FilterWeights*)malloc(maxDim * sizeof(FilterWeights));
//**------------------------------------------------------------------------
//** Need to create a temporary image to stuff the horizontally scaled image
//**------------------------------------------------------------------------
pTempImage = (RGBCOLOR *)malloc( destWidth * srcHeight * sizeof(RGBCOLOR) );
if ( pTempImage == NULL )
{
// -- GODOT start --
free( contrib );
// -- GODOT end --
return 0;
}
//**-------------------------------------------------------
//** Horizontally filter the image into the temporary image
//**-------------------------------------------------------
bool bWrapHorizontal = !!(wrapFlags&FILTER_WRAP_X);
CalcContributions( srcWidth, destWidth, filterSize, bWrapHorizontal, FilterProc, contrib );
for ( iRow = 0; iRow < srcHeight; iRow++ )
{
for ( iCol = 0; iCol < destWidth; iCol++ )
{
dRed = 0;
dGreen = 0;
dBlue = 0;
dAlpha = 0;
for ( iWeight = 0; iWeight < contrib[iCol].numWeights; iWeight++ )
{
iSrcCol = iWeight + contrib[iCol].first;
if (bWrapHorizontal)
{
iSrcCol = (iSrcCol < 0) ? (srcWidth + iSrcCol) : (iSrcCol >= srcWidth) ? (iSrcCol - srcWidth) : iSrcCol;
}
pSrcPixel = pSrcImage + (iRow * srcWidth) + iSrcCol;
dRed += contrib[iCol].weight[iWeight] * pSrcPixel->rgba[0];
dGreen += contrib[iCol].weight[iWeight] * pSrcPixel->rgba[1];
dBlue += contrib[iCol].weight[iWeight] * pSrcPixel->rgba[2];
dAlpha += contrib[iCol].weight[iWeight] * pSrcPixel->rgba[3];
}
pPixel = pTempImage + (iRow * destWidth) + iCol;
pPixel->rgba[0] = static_cast<unsigned char>(std::max(0.0, std::min(255.0, dRed)));
pPixel->rgba[1] = static_cast<unsigned char>(std::max(0.0, std::min(255.0, dGreen)));
pPixel->rgba[2] = static_cast<unsigned char>(std::max(0.0, std::min(255.0, dBlue)));
pPixel->rgba[3] = static_cast<unsigned char>(std::max(0.0, std::min(255.0, dAlpha)));
}
}
//**-------------------------------------------------------
//** Vertically filter the image into the destination image
//**-------------------------------------------------------
bool bWrapVertical = !!(wrapFlags&FILTER_WRAP_Y);
CalcContributions(srcHeight, destHeight, filterSize, bWrapVertical, FilterProc, contrib);
for ( iCol = 0; iCol < destWidth; iCol++ )
{
for ( iRow = 0; iRow < destHeight; iRow++ )
{
dRed = 0;
dGreen = 0;
dBlue = 0;
dAlpha = 0;
for ( iWeight = 0; iWeight < contrib[iRow].numWeights; iWeight++ )
{
iSrcRow = iWeight + contrib[iRow].first;
if (bWrapVertical)
{
iSrcRow = (iSrcRow < 0) ? (srcHeight + iSrcRow) : (iSrcRow >= srcHeight) ? (iSrcRow - srcHeight) : iSrcRow;
}
pSrcPixel = pTempImage + (iSrcRow * destWidth) + iCol;
dRed += contrib[iRow].weight[iWeight] * pSrcPixel->rgba[0];
dGreen += contrib[iRow].weight[iWeight] * pSrcPixel->rgba[1];
dBlue += contrib[iRow].weight[iWeight] * pSrcPixel->rgba[2];
dAlpha += contrib[iRow].weight[iWeight] * pSrcPixel->rgba[3];
}
pPixel = pDestImage + (iRow * destWidth) + iCol;
pPixel->rgba[0] = (unsigned char)(std::max( 0.0, std::min( 255.0, dRed)));
pPixel->rgba[1] = (unsigned char)(std::max( 0.0, std::min( 255.0, dGreen)));
pPixel->rgba[2] = (unsigned char)(std::max( 0.0, std::min( 255.0, dBlue)));
pPixel->rgba[3] = (unsigned char)(std::max( 0.0, std::min( 255.0, dAlpha)));
}
}
free( pTempImage );
free( contrib );
return 1;
}
//**-------------------------------------------------------------------------
//** Name: FilterResample(RGBCOLOR *pSrcImage, int srcWidth, int srcHeight,
//** RGBCOLOR *pDstImage, int dstWidth, int dstHeight)
//** Returns: 1
//** Description: This function runs a 2d box filter over the srouce image
//** to produce the destination image.
//**-------------------------------------------------------------------------
void FilterResample( RGBCOLOR *pSrcImage, int srcWidth, int srcHeight,
RGBCOLOR *pDstImage, int dstWidth, int dstHeight )
{
int iRow;
int iCol;
int iSampleRow;
int iSampleCol;
int iFirstSampleRow;
int iFirstSampleCol;
int iLastSampleRow;
int iLastSampleCol;
int red;
int green;
int blue;
int alpha;
int samples;
float xScale;
float yScale;
RGBCOLOR *pSrcPixel;
RGBCOLOR *pDstPixel;
xScale = (float)srcWidth / dstWidth;
yScale = (float)srcHeight / dstHeight;
for ( iRow = 0; iRow < dstHeight; iRow++ )
{
for ( iCol = 0; iCol < dstWidth; iCol++ )
{
iFirstSampleRow = (int)(iRow * yScale);
iLastSampleRow = (int)ceil(iFirstSampleRow + yScale - 1);
if ( iLastSampleRow >= srcHeight )
{
iLastSampleRow = srcHeight - 1;
}
iFirstSampleCol = (int)(iCol * xScale);
iLastSampleCol = (int)ceil(iFirstSampleCol + xScale - 1);
if ( iLastSampleCol >= srcWidth )
{
iLastSampleCol = srcWidth - 1;
}
samples = 0;
red = 0;
green = 0;
blue = 0;
alpha = 0;
for ( iSampleRow = iFirstSampleRow; iSampleRow <= iLastSampleRow; iSampleRow++ )
{
for ( iSampleCol = iFirstSampleCol; iSampleCol <= iLastSampleCol; iSampleCol++ )
{
pSrcPixel = pSrcImage + iSampleRow * srcWidth + iSampleCol;
red += pSrcPixel->rgba[0];
green += pSrcPixel->rgba[1];
blue += pSrcPixel->rgba[2];
alpha += pSrcPixel->rgba[3];
samples++;
}
}
pDstPixel = pDstImage + iRow * dstWidth + iCol;
if ( samples > 0 )
{
pDstPixel->rgba[0] = static_cast<uint8_t>(red / samples);
pDstPixel->rgba[1] = static_cast<uint8_t>(green / samples);
pDstPixel->rgba[2] = static_cast<uint8_t>(blue / samples);
pDstPixel->rgba[3] = static_cast<uint8_t>(alpha / samples);
}
else
{
pDstPixel->rgba[0] = static_cast<uint8_t>(red);
pDstPixel->rgba[1] = static_cast<uint8_t>(green);
pDstPixel->rgba[2] = static_cast<uint8_t>(blue);
pDstPixel->rgba[3] = static_cast<uint8_t>(alpha);
}
}
}
}
}

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#pragma once
#include <stdint.h>
#include <algorithm>
namespace Etc
{
enum FilterEnums
{
MaxFilterSize = 32
};
enum WrapFlags
{
FILTER_WRAP_NONE = 0,
FILTER_WRAP_X = 0x1,
FILTER_WRAP_Y = 0x2
};
typedef struct tagFilterWeights
{
int first;
int numWeights;
double weight[MaxFilterSize * 2 + 1];
} FilterWeights;
typedef struct tagRGBCOLOR
{
union
{
uint32_t ulColor;
uint8_t rgba[4];
};
} RGBCOLOR;
double FilterBox( double t );
double FilterLinear( double t );
double FilterLanczos3( double t );
int FilterTwoPass( RGBCOLOR *pSrcImage, int srcWidth, int srcHeight,
RGBCOLOR *pDestImage, int destWidth, int destHeight, unsigned int wrapFlags, double (*FilterProc)(double) );
void FilterResample( RGBCOLOR *pSrcImage, int srcWidth, int srcHeight,
RGBCOLOR *pDstImage, int dstWidth, int dstHeight );
void CalcContributions(int srcSize, int destSize, double filterSize, bool wrap, double(*FilterProc)(double), FilterWeights contrib[]);
template <typename T>
void FilterResample(T *pSrcImage, int srcWidth, int srcHeight, T *pDstImage, int dstWidth, int dstHeight)
{
float xScale;
float yScale;
T *pSrcPixel;
T *pDstPixel;
xScale = (float)srcWidth / dstWidth;
yScale = (float)srcHeight / dstHeight;
for (int iRow = 0; iRow < dstHeight; iRow++)
{
for (int iCol = 0; iCol < dstWidth; iCol++)
{
int samples;
int iFirstSampleRow;
int iFirstSampleCol;
int iLastSampleRow;
int iLastSampleCol;
float red;
float green;
float blue;
float alpha;
iFirstSampleRow = (int)(iRow * yScale);
iLastSampleRow = (int)ceil(iFirstSampleRow + yScale - 1);
if (iLastSampleRow >= srcHeight)
{
iLastSampleRow = srcHeight - 1;
}
iFirstSampleCol = (int)(iCol * xScale);
iLastSampleCol = (int)ceil(iFirstSampleCol + xScale - 1);
if (iLastSampleCol >= srcWidth)
{
iLastSampleCol = srcWidth - 1;
}
samples = 0;
red = 0.f;
green = 0.f;
blue = 0.f;
alpha = 0.f;
for (int iSampleRow = iFirstSampleRow; iSampleRow <= iLastSampleRow; iSampleRow++)
{
for (int iSampleCol = iFirstSampleCol; iSampleCol <= iLastSampleCol; iSampleCol++)
{
pSrcPixel = pSrcImage + (iSampleRow * srcWidth + iSampleCol) * 4;
red += static_cast<float>(pSrcPixel[0]);
green += static_cast<float>(pSrcPixel[1]);
blue += static_cast<float>(pSrcPixel[2]);
alpha += static_cast<float>(pSrcPixel[3]);
samples++;
}
}
pDstPixel = pDstImage + (iRow * dstWidth + iCol) * 4;
if (samples > 0)
{
pDstPixel[0] = static_cast<T>(red / samples);
pDstPixel[1] = static_cast<T>(green / samples);
pDstPixel[2] = static_cast<T>(blue / samples);
pDstPixel[3] = static_cast<T>(alpha / samples);
}
else
{
pDstPixel[0] = static_cast<T>(red);
pDstPixel[1] = static_cast<T>(green);
pDstPixel[2] = static_cast<T>(blue);
pDstPixel[3] = static_cast<T>(alpha);
}
}
}
}
//**-------------------------------------------------------------------------
//** Name: Filter_TwoPass( RGBCOLOR *pSrcImage,
//** int srcWidth, int srcHeight,
//** RGBCOLOR *pDestImage,
//** int destWidth, int destHeight,
//** double (*FilterProc)(double) )
//** Returns: 0 on failure and 1 on success
//** Description: Filters a 2d image with a two pass filter by averaging the
//** weighted contributions of the pixels within the filter region. The
//** contributions are determined by a weighting function parameter.
//**-------------------------------------------------------------------------
template <typename T>
int FilterTwoPass(T *pSrcImage, int srcWidth, int srcHeight,
T *pDestImage, int destWidth, int destHeight, unsigned int wrapFlags, double(*FilterProc)(double))
{
const int numComponents = 4;
FilterWeights *contrib;
T *pPixel;
T *pTempImage;
double dRed;
double dGreen;
double dBlue;
double dAlpha;
double filterSize = 3.0;
int maxDim = (srcWidth>srcHeight) ? srcWidth : srcHeight;
contrib = new FilterWeights[maxDim];
//**------------------------------------------------------------------------
//** Need to create a temporary image to stuff the horizontally scaled image
//**------------------------------------------------------------------------
pTempImage = new T[destWidth * srcHeight * numComponents];
if (pTempImage == NULL)
{
return 0;
}
//**-------------------------------------------------------
//** Horizontally filter the image into the temporary image
//**-------------------------------------------------------
bool bWrapHorizontal = !!(wrapFlags&FILTER_WRAP_X);
CalcContributions(srcWidth, destWidth, filterSize, bWrapHorizontal, FilterProc, contrib);
for (int iRow = 0; iRow < srcHeight; iRow++)
{
for (int iCol = 0; iCol < destWidth; iCol++)
{
dRed = 0;
dGreen = 0;
dBlue = 0;
dAlpha = 0;
for (int iWeight = 0; iWeight < contrib[iCol].numWeights; iWeight++)
{
int iSrcCol = iWeight + contrib[iCol].first;
if(bWrapHorizontal)
{
iSrcCol = (iSrcCol < 0)?(srcWidth+iSrcCol):(iSrcCol >= srcWidth)?(iSrcCol-srcWidth):iSrcCol;
}
T* pSrcPixel = pSrcImage + ((iRow * srcWidth) + iSrcCol)*numComponents;
dRed += contrib[iCol].weight[iWeight] * pSrcPixel[0];
dGreen += contrib[iCol].weight[iWeight] * pSrcPixel[1];
dBlue += contrib[iCol].weight[iWeight] * pSrcPixel[2];
dAlpha += contrib[iCol].weight[iWeight] * pSrcPixel[3];
}
pPixel = pTempImage + ((iRow * destWidth) + iCol)*numComponents;
pPixel[0] = static_cast<T>(std::max(0.0, std::min(255.0, dRed)));
pPixel[1] = static_cast<T>(std::max(0.0, std::min(255.0, dGreen)));
pPixel[2] = static_cast<T>(std::max(0.0, std::min(255.0, dBlue)));
pPixel[3] = static_cast<T>(std::max(0.0, std::min(255.0, dAlpha)));
}
}
//**-------------------------------------------------------
//** Vertically filter the image into the destination image
//**-------------------------------------------------------
bool bWrapVertical = !!(wrapFlags&FILTER_WRAP_Y);
CalcContributions(srcHeight, destHeight, filterSize, bWrapVertical, FilterProc, contrib);
for (int iCol = 0; iCol < destWidth; iCol++)
{
for (int iRow = 0; iRow < destHeight; iRow++)
{
dRed = 0;
dGreen = 0;
dBlue = 0;
dAlpha = 0;
for (int iWeight = 0; iWeight < contrib[iRow].numWeights; iWeight++)
{
int iSrcRow = iWeight + contrib[iRow].first;
if (bWrapVertical)
{
iSrcRow = (iSrcRow < 0) ? (srcHeight + iSrcRow) : (iSrcRow >= srcHeight) ? (iSrcRow - srcHeight) : iSrcRow;
}
T* pSrcPixel = pTempImage + ((iSrcRow * destWidth) + iCol)*numComponents;
dRed += contrib[iRow].weight[iWeight] * pSrcPixel[0];
dGreen += contrib[iRow].weight[iWeight] * pSrcPixel[1];
dBlue += contrib[iRow].weight[iWeight] * pSrcPixel[2];
dAlpha += contrib[iRow].weight[iWeight] * pSrcPixel[3];
}
pPixel = pDestImage + ((iRow * destWidth) + iCol)*numComponents;
pPixel[0] = static_cast<T>(std::max(0.0, std::min(255.0, dRed)));
pPixel[1] = static_cast<T>(std::max(0.0, std::min(255.0, dGreen)));
pPixel[2] = static_cast<T>(std::max(0.0, std::min(255.0, dBlue)));
pPixel[3] = static_cast<T>(std::max(0.0, std::min(255.0, dAlpha)));
}
}
delete[] pTempImage;
delete[] contrib;
return 1;
}
}

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thirdparty/etc2comp/EtcImage.cpp vendored
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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
EtcImage.cpp
Image is an array of 4x4 blocks that represent the encoding of the source image
*/
#include "EtcConfig.h"
#include <stdlib.h>
#include "EtcImage.h"
#include "Etc.h"
#include "EtcBlock4x4.h"
#include "EtcBlock4x4EncodingBits.h"
#include "EtcSortedBlockList.h"
#if ETC_WINDOWS
#include <windows.h>
#endif
#include <ctime>
#include <chrono>
#include <future>
#include <stdio.h>
#include <string.h>
#include <assert.h>
// fix conflict with Block4x4::AlphaMix
#ifdef OPAQUE
#undef OPAQUE
#endif
#ifdef TRANSPARENT
#undef TRANSPARENT
#endif
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
//
Image::Image(void)
{
m_encodingStatus = EncodingStatus::SUCCESS;
m_warningsToCapture = EncodingStatus::SUCCESS;
m_pafrgbaSource = nullptr;
m_pablock = nullptr;
m_encodingbitsformat = Block4x4EncodingBits::Format::UNKNOWN;
m_uiEncodingBitsBytes = 0;
m_paucEncodingBits = nullptr;
m_format = Format::UNKNOWN;
m_iNumOpaquePixels = 0;
m_iNumTranslucentPixels = 0;
m_iNumTransparentPixels = 0;
}
// ----------------------------------------------------------------------------------------------------
// constructor using source image
// used to set state before Encode() is called
//
Image::Image(float *a_pafSourceRGBA, unsigned int a_uiSourceWidth,
unsigned int a_uiSourceHeight,
ErrorMetric a_errormetric)
{
m_encodingStatus = EncodingStatus::SUCCESS;
m_warningsToCapture = EncodingStatus::SUCCESS;
m_pafrgbaSource = (ColorFloatRGBA *) a_pafSourceRGBA;
m_uiSourceWidth = a_uiSourceWidth;
m_uiSourceHeight = a_uiSourceHeight;
m_uiExtendedWidth = CalcExtendedDimension((unsigned short)m_uiSourceWidth);
m_uiExtendedHeight = CalcExtendedDimension((unsigned short)m_uiSourceHeight);
m_uiBlockColumns = m_uiExtendedWidth >> 2;
m_uiBlockRows = m_uiExtendedHeight >> 2;
m_pablock = new Block4x4[GetNumberOfBlocks()];
assert(m_pablock);
m_format = Format::UNKNOWN;
m_encodingbitsformat = Block4x4EncodingBits::Format::UNKNOWN;
m_uiEncodingBitsBytes = 0;
m_paucEncodingBits = nullptr;
m_errormetric = a_errormetric;
m_fEffort = 0.0f;
m_iEncodeTime_ms = -1;
m_iNumOpaquePixels = 0;
m_iNumTranslucentPixels = 0;
m_iNumTransparentPixels = 0;
m_bVerboseOutput = false;
}
// ----------------------------------------------------------------------------------------------------
// constructor using encoding bits
// recreates encoding state using a previously encoded image
//
Image::Image(Format a_format,
unsigned int a_uiSourceWidth, unsigned int a_uiSourceHeight,
unsigned char *a_paucEncidingBits, unsigned int a_uiEncodingBitsBytes,
Image *a_pimageSource, ErrorMetric a_errormetric)
{
m_encodingStatus = EncodingStatus::SUCCESS;
m_pafrgbaSource = nullptr;
m_uiSourceWidth = a_uiSourceWidth;
m_uiSourceHeight = a_uiSourceHeight;
m_uiExtendedWidth = CalcExtendedDimension((unsigned short)m_uiSourceWidth);
m_uiExtendedHeight = CalcExtendedDimension((unsigned short)m_uiSourceHeight);
m_uiBlockColumns = m_uiExtendedWidth >> 2;
m_uiBlockRows = m_uiExtendedHeight >> 2;
unsigned int uiBlocks = GetNumberOfBlocks();
m_pablock = new Block4x4[uiBlocks];
assert(m_pablock);
m_format = a_format;
m_iNumOpaquePixels = 0;
m_iNumTranslucentPixels = 0;
m_iNumTransparentPixels = 0;
m_encodingbitsformat = DetermineEncodingBitsFormat(m_format);
if (m_encodingbitsformat == Block4x4EncodingBits::Format::UNKNOWN)
{
AddToEncodingStatus(ERROR_UNKNOWN_FORMAT);
return;
}
m_uiEncodingBitsBytes = a_uiEncodingBitsBytes;
m_paucEncodingBits = a_paucEncidingBits;
m_errormetric = a_errormetric;
m_fEffort = 0.0f;
m_bVerboseOutput = false;
m_iEncodeTime_ms = -1;
unsigned char *paucEncodingBits = m_paucEncodingBits;
unsigned int uiEncodingBitsBytesPerBlock = Block4x4EncodingBits::GetBytesPerBlock(m_encodingbitsformat);
unsigned int uiH = 0;
unsigned int uiV = 0;
for (unsigned int uiBlock = 0; uiBlock < uiBlocks; uiBlock++)
{
m_pablock[uiBlock].InitFromEtcEncodingBits(a_format, uiH, uiV, paucEncodingBits,
a_pimageSource, a_errormetric);
paucEncodingBits += uiEncodingBitsBytesPerBlock;
uiH += 4;
if (uiH >= m_uiSourceWidth)
{
uiH = 0;
uiV += 4;
}
}
}
// ----------------------------------------------------------------------------------------------------
//
Image::~Image(void)
{
if (m_pablock != nullptr)
{
delete[] m_pablock;
m_pablock = nullptr;
}
/*if (m_paucEncodingBits != nullptr)
{
delete[] m_paucEncodingBits;
m_paucEncodingBits = nullptr;
}*/
}
// ----------------------------------------------------------------------------------------------------
// encode an image
// create a set of encoding bits that conforms to a_format
// find best fit using a_errormetric
// explore a range of possible encodings based on a_fEffort (range = [0:100])
// speed up process using a_uiJobs as the number of process threads (a_uiJobs must not excede a_uiMaxJobs)
//
Image::EncodingStatus Image::Encode(Format a_format, ErrorMetric a_errormetric, float a_fEffort, unsigned int a_uiJobs, unsigned int a_uiMaxJobs)
{
auto start = std::chrono::steady_clock::now();
m_encodingStatus = EncodingStatus::SUCCESS;
m_format = a_format;
m_errormetric = a_errormetric;
m_fEffort = a_fEffort;
if (m_errormetric < 0 || m_errormetric > ERROR_METRICS)
{
AddToEncodingStatus(ERROR_UNKNOWN_ERROR_METRIC);
return m_encodingStatus;
}
if (m_fEffort < ETCCOMP_MIN_EFFORT_LEVEL)
{
AddToEncodingStatus(WARNING_EFFORT_OUT_OF_RANGE);
m_fEffort = ETCCOMP_MIN_EFFORT_LEVEL;
}
else if (m_fEffort > ETCCOMP_MAX_EFFORT_LEVEL)
{
AddToEncodingStatus(WARNING_EFFORT_OUT_OF_RANGE);
m_fEffort = ETCCOMP_MAX_EFFORT_LEVEL;
}
if (a_uiJobs < 1)
{
a_uiJobs = 1;
AddToEncodingStatus(WARNING_JOBS_OUT_OF_RANGE);
}
else if (a_uiJobs > a_uiMaxJobs)
{
a_uiJobs = a_uiMaxJobs;
AddToEncodingStatus(WARNING_JOBS_OUT_OF_RANGE);
}
m_encodingbitsformat = DetermineEncodingBitsFormat(m_format);
if (m_encodingbitsformat == Block4x4EncodingBits::Format::UNKNOWN)
{
AddToEncodingStatus(ERROR_UNKNOWN_FORMAT);
return m_encodingStatus;
}
assert(m_paucEncodingBits == nullptr);
m_uiEncodingBitsBytes = GetNumberOfBlocks() * Block4x4EncodingBits::GetBytesPerBlock(m_encodingbitsformat);
m_paucEncodingBits = new unsigned char[m_uiEncodingBitsBytes];
InitBlocksAndBlockSorter();
std::future<void> *handle = new std::future<void>[a_uiMaxJobs];
unsigned int uiNumThreadsNeeded = 0;
unsigned int uiUnfinishedBlocks = GetNumberOfBlocks();
uiNumThreadsNeeded = (uiUnfinishedBlocks < a_uiJobs) ? uiUnfinishedBlocks : a_uiJobs;
for (int i = 0; i < (int)uiNumThreadsNeeded - 1; i++)
{
handle[i] = async(std::launch::async, &Image::RunFirstPass, this, i, uiNumThreadsNeeded);
}
RunFirstPass(uiNumThreadsNeeded - 1, uiNumThreadsNeeded);
for (int i = 0; i < (int)uiNumThreadsNeeded - 1; i++)
{
handle[i].get();
}
// perform effort-based encoding
if (m_fEffort > ETCCOMP_MIN_EFFORT_LEVEL)
{
unsigned int uiFinishedBlocks = 0;
unsigned int uiTotalEffortBlocks = static_cast<unsigned int>(roundf(0.01f * m_fEffort * GetNumberOfBlocks()));
if (m_bVerboseOutput)
{
printf("effortblocks = %d\n", uiTotalEffortBlocks);
}
unsigned int uiPass = 0;
while (1)
{
if (m_bVerboseOutput)
{
uiPass++;
printf("pass %u\n", uiPass);
}
m_psortedblocklist->Sort();
uiUnfinishedBlocks = m_psortedblocklist->GetNumberOfSortedBlocks();
uiFinishedBlocks = GetNumberOfBlocks() - uiUnfinishedBlocks;
if (m_bVerboseOutput)
{
printf(" %u unfinished blocks\n", uiUnfinishedBlocks);
// m_psortedblocklist->Print();
}
//stop enocding when we did enough to satify the effort percentage
if (uiFinishedBlocks >= uiTotalEffortBlocks)
{
if (m_bVerboseOutput)
{
printf("Finished %d Blocks out of %d\n", uiFinishedBlocks, uiTotalEffortBlocks);
}
break;
}
unsigned int uiIteratedBlocks = 0;
unsigned int blocksToIterateThisPass = (uiTotalEffortBlocks - uiFinishedBlocks);
uiNumThreadsNeeded = (uiUnfinishedBlocks < a_uiJobs) ? uiUnfinishedBlocks : a_uiJobs;
if (uiNumThreadsNeeded <= 1)
{
//since we already how many blocks each thread will process
//cap the thread limit to do the proper amount of work, and not more
uiIteratedBlocks = IterateThroughWorstBlocks(blocksToIterateThisPass, 0, 1);
}
else
{
//we have a lot of work to do, so lets multi thread it
std::future<unsigned int> *handleToBlockEncoders = new std::future<unsigned int>[uiNumThreadsNeeded-1];
for (int i = 0; i < (int)uiNumThreadsNeeded - 1; i++)
{
handleToBlockEncoders[i] = async(std::launch::async, &Image::IterateThroughWorstBlocks, this, blocksToIterateThisPass, i, uiNumThreadsNeeded);
}
uiIteratedBlocks = IterateThroughWorstBlocks(blocksToIterateThisPass, uiNumThreadsNeeded - 1, uiNumThreadsNeeded);
for (int i = 0; i < (int)uiNumThreadsNeeded - 1; i++)
{
uiIteratedBlocks += handleToBlockEncoders[i].get();
}
delete[] handleToBlockEncoders;
}
if (m_bVerboseOutput)
{
printf(" %u iterated blocks\n", uiIteratedBlocks);
}
}
}
// generate Etc2-compatible bit-format 4x4 blocks
for (int i = 0; i < (int)a_uiJobs - 1; i++)
{
handle[i] = async(std::launch::async, &Image::SetEncodingBits, this, i, a_uiJobs);
}
SetEncodingBits(a_uiJobs - 1, a_uiJobs);
for (int i = 0; i < (int)a_uiJobs - 1; i++)
{
handle[i].get();
}
auto end = std::chrono::steady_clock::now();
std::chrono::milliseconds elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
m_iEncodeTime_ms = (int)elapsed.count();
delete[] handle;
delete m_psortedblocklist;
return m_encodingStatus;
}
// ----------------------------------------------------------------------------------------------------
// iterate the encoding thru the blocks with the worst error
// stop when a_uiMaxBlocks blocks have been iterated
// split the blocks between the process threads using a_uiMultithreadingOffset and a_uiMultithreadingStride
//
unsigned int Image::IterateThroughWorstBlocks(unsigned int a_uiMaxBlocks,
unsigned int a_uiMultithreadingOffset,
unsigned int a_uiMultithreadingStride)
{
assert(a_uiMultithreadingStride > 0);
unsigned int uiIteratedBlocks = a_uiMultithreadingOffset;
SortedBlockList::Link *plink = m_psortedblocklist->GetLinkToFirstBlock();
for (plink = plink->Advance(a_uiMultithreadingOffset);
plink != nullptr;
plink = plink->Advance(a_uiMultithreadingStride) )
{
if (uiIteratedBlocks >= a_uiMaxBlocks)
{
break;
}
plink->GetBlock()->PerformEncodingIteration(m_fEffort);
uiIteratedBlocks += a_uiMultithreadingStride;
}
return uiIteratedBlocks;
}
// ----------------------------------------------------------------------------------------------------
// determine which warnings to check for during Encode() based on encoding format
//
void Image::FindEncodingWarningTypesForCurFormat()
{
TrackEncodingWarning(WARNING_ALL_TRANSPARENT_PIXELS);
TrackEncodingWarning(WARNING_SOME_RGBA_NOT_0_TO_1);
switch (m_format)
{
case Image::Format::ETC1:
case Image::Format::RGB8:
case Image::Format::SRGB8:
TrackEncodingWarning(WARNING_SOME_NON_OPAQUE_PIXELS);
TrackEncodingWarning(WARNING_SOME_TRANSLUCENT_PIXELS);
break;
case Image::Format::RGB8A1:
case Image::Format::SRGB8A1:
TrackEncodingWarning(WARNING_SOME_TRANSLUCENT_PIXELS);
TrackEncodingWarning(WARNING_ALL_OPAQUE_PIXELS);
break;
case Image::Format::RGBA8:
case Image::Format::SRGBA8:
TrackEncodingWarning(WARNING_ALL_OPAQUE_PIXELS);
break;
case Image::Format::R11:
case Image::Format::SIGNED_R11:
TrackEncodingWarning(WARNING_SOME_NON_OPAQUE_PIXELS);
TrackEncodingWarning(WARNING_SOME_TRANSLUCENT_PIXELS);
TrackEncodingWarning(WARNING_SOME_GREEN_VALUES_ARE_NOT_ZERO);
TrackEncodingWarning(WARNING_SOME_BLUE_VALUES_ARE_NOT_ZERO);
break;
case Image::Format::RG11:
case Image::Format::SIGNED_RG11:
TrackEncodingWarning(WARNING_SOME_NON_OPAQUE_PIXELS);
TrackEncodingWarning(WARNING_SOME_TRANSLUCENT_PIXELS);
TrackEncodingWarning(WARNING_SOME_BLUE_VALUES_ARE_NOT_ZERO);
break;
case Image::Format::FORMATS:
case Image::Format::UNKNOWN:
default:
assert(0);
break;
}
}
// ----------------------------------------------------------------------------------------------------
// examine source pixels to check for warnings
//
void Image::FindAndSetEncodingWarnings()
{
int numPixels = (m_uiBlockRows * 4) * (m_uiBlockColumns * 4);
if (m_iNumOpaquePixels == numPixels)
{
AddToEncodingStatusIfSignfigant(Image::EncodingStatus::WARNING_ALL_OPAQUE_PIXELS);
}
if (m_iNumOpaquePixels < numPixels)
{
AddToEncodingStatusIfSignfigant(Image::EncodingStatus::WARNING_SOME_NON_OPAQUE_PIXELS);
}
if (m_iNumTranslucentPixels > 0)
{
AddToEncodingStatusIfSignfigant(Image::EncodingStatus::WARNING_SOME_TRANSLUCENT_PIXELS);
}
if (m_iNumTransparentPixels == numPixels)
{
AddToEncodingStatusIfSignfigant(Image::EncodingStatus::WARNING_ALL_TRANSPARENT_PIXELS);
}
if (m_numColorValues.fB > 0.0f)
{
AddToEncodingStatusIfSignfigant(Image::EncodingStatus::WARNING_SOME_BLUE_VALUES_ARE_NOT_ZERO);
}
if (m_numColorValues.fG > 0.0f)
{
AddToEncodingStatusIfSignfigant(Image::EncodingStatus::WARNING_SOME_GREEN_VALUES_ARE_NOT_ZERO);
}
if (m_numOutOfRangeValues.fR > 0.0f || m_numOutOfRangeValues.fG > 0.0f)
{
AddToEncodingStatusIfSignfigant(Image::EncodingStatus::WARNING_SOME_RGBA_NOT_0_TO_1);
}
if (m_numOutOfRangeValues.fB > 0.0f || m_numOutOfRangeValues.fA > 0.0f)
{
AddToEncodingStatusIfSignfigant(Image::EncodingStatus::WARNING_SOME_RGBA_NOT_0_TO_1);
}
}
// ----------------------------------------------------------------------------------------------------
// return a string name for a given image format
//
const char * Image::EncodingFormatToString(Image::Format a_format)
{
switch (a_format)
{
case Image::Format::ETC1:
return "ETC1";
case Image::Format::RGB8:
return "RGB8";
case Image::Format::SRGB8:
return "SRGB8";
case Image::Format::RGB8A1:
return "RGB8A1";
case Image::Format::SRGB8A1:
return "SRGB8A1";
case Image::Format::RGBA8:
return "RGBA8";
case Image::Format::SRGBA8:
return "SRGBA8";
case Image::Format::R11:
return "R11";
case Image::Format::SIGNED_R11:
return "SIGNED_R11";
case Image::Format::RG11:
return "RG11";
case Image::Format::SIGNED_RG11:
return "SIGNED_RG11";
case Image::Format::FORMATS:
case Image::Format::UNKNOWN:
default:
return "UNKNOWN";
}
}
// ----------------------------------------------------------------------------------------------------
// return a string name for the image's format
//
const char * Image::EncodingFormatToString(void)
{
return EncodingFormatToString(m_format);
}
// ----------------------------------------------------------------------------------------------------
// init image blocks prior to encoding
// init block sorter for subsequent sortings
// check for encoding warnings
//
void Image::InitBlocksAndBlockSorter(void)
{
FindEncodingWarningTypesForCurFormat();
// init each block
Block4x4 *pblock = m_pablock;
unsigned char *paucEncodingBits = m_paucEncodingBits;
for (unsigned int uiBlockRow = 0; uiBlockRow < m_uiBlockRows; uiBlockRow++)
{
unsigned int uiBlockV = uiBlockRow * 4;
for (unsigned int uiBlockColumn = 0; uiBlockColumn < m_uiBlockColumns; uiBlockColumn++)
{
unsigned int uiBlockH = uiBlockColumn * 4;
pblock->InitFromSource(this, uiBlockH, uiBlockV, paucEncodingBits, m_errormetric);
paucEncodingBits += Block4x4EncodingBits::GetBytesPerBlock(m_encodingbitsformat);
pblock++;
}
}
FindAndSetEncodingWarnings();
// init block sorter
{
m_psortedblocklist = new SortedBlockList(GetNumberOfBlocks(), 100);
for (unsigned int uiBlock = 0; uiBlock < GetNumberOfBlocks(); uiBlock++)
{
pblock = &m_pablock[uiBlock];
m_psortedblocklist->AddBlock(pblock);
}
}
}
// ----------------------------------------------------------------------------------------------------
// run the first pass of the encoder
// the encoder generally finds a reasonable, fast encoding
// this is run on all blocks regardless of effort to ensure that all blocks have a valid encoding
//
void Image::RunFirstPass(unsigned int a_uiMultithreadingOffset, unsigned int a_uiMultithreadingStride)
{
assert(a_uiMultithreadingStride > 0);
for (unsigned int uiBlock = a_uiMultithreadingOffset;
uiBlock < GetNumberOfBlocks();
uiBlock += a_uiMultithreadingStride)
{
Block4x4 *pblock = &m_pablock[uiBlock];
pblock->PerformEncodingIteration(m_fEffort);
}
}
// ----------------------------------------------------------------------------------------------------
// set the encoding bits (for the output file) based on the best encoding for each block
//
void Image::SetEncodingBits(unsigned int a_uiMultithreadingOffset,
unsigned int a_uiMultithreadingStride)
{
assert(a_uiMultithreadingStride > 0);
for (unsigned int uiBlock = a_uiMultithreadingOffset;
uiBlock < GetNumberOfBlocks();
uiBlock += a_uiMultithreadingStride)
{
Block4x4 *pblock = &m_pablock[uiBlock];
pblock->SetEncodingBitsFromEncoding();
}
}
// ----------------------------------------------------------------------------------------------------
// return the image error
// image error is the sum of all block errors
//
float Image::GetError(void)
{
float fError = 0.0f;
for (unsigned int uiBlock = 0; uiBlock < GetNumberOfBlocks(); uiBlock++)
{
Block4x4 *pblock = &m_pablock[uiBlock];
fError += pblock->GetError();
}
return fError;
}
// ----------------------------------------------------------------------------------------------------
// determine the encoding bits format based on the encoding format
// the encoding bits format is a family of bit encodings that are shared across various encoding formats
//
Block4x4EncodingBits::Format Image::DetermineEncodingBitsFormat(Format a_format)
{
Block4x4EncodingBits::Format encodingbitsformat;
// determine encoding bits format from image format
switch (a_format)
{
case Format::ETC1:
case Format::RGB8:
case Format::SRGB8:
encodingbitsformat = Block4x4EncodingBits::Format::RGB8;
break;
case Format::RGBA8:
case Format::SRGBA8:
encodingbitsformat = Block4x4EncodingBits::Format::RGBA8;
break;
case Format::R11:
case Format::SIGNED_R11:
encodingbitsformat = Block4x4EncodingBits::Format::R11;
break;
case Format::RG11:
case Format::SIGNED_RG11:
encodingbitsformat = Block4x4EncodingBits::Format::RG11;
break;
case Format::RGB8A1:
case Format::SRGB8A1:
encodingbitsformat = Block4x4EncodingBits::Format::RGB8A1;
break;
default:
encodingbitsformat = Block4x4EncodingBits::Format::UNKNOWN;
break;
}
return encodingbitsformat;
}
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

249
thirdparty/etc2comp/EtcImage.h vendored
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@ -1,249 +0,0 @@
/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
//#include "Etc.h"
#include "EtcColorFloatRGBA.h"
#include "EtcBlock4x4EncodingBits.h"
#include "EtcErrorMetric.h"
namespace Etc
{
class Block4x4;
class EncoderSpec;
class SortedBlockList;
class Image
{
public:
//the differnt warning and errors that can come up during encoding
enum EncodingStatus
{
SUCCESS = 0,
//
WARNING_THRESHOLD = 1 << 0,
//
WARNING_EFFORT_OUT_OF_RANGE = 1 << 1,
WARNING_JOBS_OUT_OF_RANGE = 1 << 2,
WARNING_SOME_NON_OPAQUE_PIXELS = 1 << 3,//just for opaque formats, etc1, rgb8, r11, rg11
WARNING_ALL_OPAQUE_PIXELS = 1 << 4,
WARNING_ALL_TRANSPARENT_PIXELS = 1 << 5,
WARNING_SOME_TRANSLUCENT_PIXELS = 1 << 6,//just for rgb8A1
WARNING_SOME_RGBA_NOT_0_TO_1 = 1 << 7,
WARNING_SOME_BLUE_VALUES_ARE_NOT_ZERO = 1 << 8,
WARNING_SOME_GREEN_VALUES_ARE_NOT_ZERO = 1 << 9,
//
ERROR_THRESHOLD = 1 << 16,
//
ERROR_UNKNOWN_FORMAT = 1 << 17,
ERROR_UNKNOWN_ERROR_METRIC = 1 << 18,
ERROR_ZERO_WIDTH_OR_HEIGHT = 1 << 19,
//
};
enum class Format
{
UNKNOWN,
//
ETC1,
//
// ETC2 formats
RGB8,
SRGB8,
RGBA8,
SRGBA8,
R11,
SIGNED_R11,
RG11,
SIGNED_RG11,
RGB8A1,
SRGB8A1,
//
FORMATS,
//
DEFAULT = SRGB8
};
// constructor using source image
Image(float *a_pafSourceRGBA, unsigned int a_uiSourceWidth,
unsigned int a_uiSourceHeight,
ErrorMetric a_errormetric);
// constructor using encoding bits
Image(Format a_format,
unsigned int a_uiSourceWidth, unsigned int a_uiSourceHeight,
unsigned char *a_paucEncidingBits, unsigned int a_uiEncodingBitsBytes,
Image *a_pimageSource,
ErrorMetric a_errormetric);
~Image(void);
EncodingStatus Encode(Format a_format, ErrorMetric a_errormetric, float a_fEffort,
unsigned int a_uiJobs, unsigned int a_uiMaxJobs);
inline void AddToEncodingStatus(EncodingStatus a_encStatus)
{
m_encodingStatus = (EncodingStatus)((unsigned int)m_encodingStatus | (unsigned int)a_encStatus);
}
inline unsigned int GetSourceWidth(void)
{
return m_uiSourceWidth;
}
inline unsigned int GetSourceHeight(void)
{
return m_uiSourceHeight;
}
inline unsigned int GetExtendedWidth(void)
{
return m_uiExtendedWidth;
}
inline unsigned int GetExtendedHeight(void)
{
return m_uiExtendedHeight;
}
inline unsigned int GetNumberOfBlocks()
{
return m_uiBlockColumns * m_uiBlockRows;
}
inline Block4x4 * GetBlocks()
{
return m_pablock;
}
inline unsigned char * GetEncodingBits(void)
{
return m_paucEncodingBits;
}
inline unsigned int GetEncodingBitsBytes(void)
{
return m_uiEncodingBitsBytes;
}
inline int GetEncodingTimeMs(void)
{
return m_iEncodeTime_ms;
}
float GetError(void);
inline ColorFloatRGBA * GetSourcePixel(unsigned int a_uiH, unsigned int a_uiV)
{
if (a_uiH >= m_uiSourceWidth || a_uiV >= m_uiSourceHeight)
{
return nullptr;
}
return &m_pafrgbaSource[a_uiV*m_uiSourceWidth + a_uiH];
}
inline Format GetFormat(void)
{
return m_format;
}
static Block4x4EncodingBits::Format DetermineEncodingBitsFormat(Format a_format);
inline static unsigned short CalcExtendedDimension(unsigned short a_ushOriginalDimension)
{
return (unsigned short)((a_ushOriginalDimension + 3) & ~3);
}
inline ErrorMetric GetErrorMetric(void)
{
return m_errormetric;
}
static const char * EncodingFormatToString(Image::Format a_format);
const char * EncodingFormatToString(void);
//used to get basic information about the image data
int m_iNumOpaquePixels;
int m_iNumTranslucentPixels;
int m_iNumTransparentPixels;
ColorFloatRGBA m_numColorValues;
ColorFloatRGBA m_numOutOfRangeValues;
bool m_bVerboseOutput;
private:
//add a warning or error to check for while encoding
inline void TrackEncodingWarning(EncodingStatus a_encStatus)
{
m_warningsToCapture = (EncodingStatus)((unsigned int)m_warningsToCapture | (unsigned int)a_encStatus);
}
//report the warning if it is something we care about for this encoding
inline void AddToEncodingStatusIfSignfigant(EncodingStatus a_encStatus)
{
if ((EncodingStatus)((unsigned int)m_warningsToCapture & (unsigned int)a_encStatus) == a_encStatus)
{
AddToEncodingStatus(a_encStatus);
}
}
Image(void);
void FindEncodingWarningTypesForCurFormat();
void FindAndSetEncodingWarnings();
void InitBlocksAndBlockSorter(void);
void RunFirstPass(unsigned int a_uiMultithreadingOffset,
unsigned int a_uiMultithreadingStride);
void SetEncodingBits(unsigned int a_uiMultithreadingOffset,
unsigned int a_uiMultithreadingStride);
unsigned int IterateThroughWorstBlocks(unsigned int a_uiMaxBlocks,
unsigned int a_uiMultithreadingOffset,
unsigned int a_uiMultithreadingStride);
// inputs
ColorFloatRGBA *m_pafrgbaSource;
unsigned int m_uiSourceWidth;
unsigned int m_uiSourceHeight;
unsigned int m_uiExtendedWidth;
unsigned int m_uiExtendedHeight;
unsigned int m_uiBlockColumns;
unsigned int m_uiBlockRows;
// intermediate data
Block4x4 *m_pablock;
// encoding
Format m_format;
Block4x4EncodingBits::Format m_encodingbitsformat;
unsigned int m_uiEncodingBitsBytes; // for entire image
unsigned char *m_paucEncodingBits;
ErrorMetric m_errormetric;
float m_fEffort;
// stats
int m_iEncodeTime_ms;
SortedBlockList *m_psortedblocklist;
//this will hold any warning or errors that happen during encoding
EncodingStatus m_encodingStatus;
//these will be the warnings we are tracking
EncodingStatus m_warningsToCapture;
};
} // namespace Etc

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thirdparty/etc2comp/EtcIndividualTrys.cpp vendored
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@ -1,85 +0,0 @@
/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
EtcIndividualTrys.cpp
Gathers the results of the various encoding trys for both halves of a 4x4 block for Individual mode
*/
#include "EtcConfig.h"
#include "EtcIndividualTrys.h"
#include <assert.h>
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
// construct a list of trys (encoding attempts)
//
// a_frgbaColor1 is the basecolor for the first half
// a_frgbaColor2 is the basecolor for the second half
// a_pauiPixelMapping1 is the pixel order for the first half
// a_pauiPixelMapping2 is the pixel order for the second half
// a_uiRadius is the amount to vary the base colors
//
IndividualTrys::IndividualTrys(ColorFloatRGBA a_frgbaColor1, ColorFloatRGBA a_frgbaColor2,
const unsigned int *a_pauiPixelMapping1,
const unsigned int *a_pauiPixelMapping2,
unsigned int a_uiRadius)
{
assert(a_uiRadius <= MAX_RADIUS);
ColorFloatRGBA frgbaQuantizedColor1 = a_frgbaColor1.QuantizeR4G4B4();
ColorFloatRGBA frgbaQuantizedColor2 = a_frgbaColor2.QuantizeR4G4B4();
// quantize base colors
// ensure that trys with a_uiRadius don't overflow
int iRed1 = MoveAwayFromEdge(frgbaQuantizedColor1.IntRed(15.0f), a_uiRadius);
int iGreen1 = MoveAwayFromEdge(frgbaQuantizedColor1.IntGreen(15.0f), a_uiRadius);
int iBlue1 = MoveAwayFromEdge(frgbaQuantizedColor1.IntBlue(15.0f), a_uiRadius);
int iRed2 = MoveAwayFromEdge(frgbaQuantizedColor2.IntRed(15.0f), a_uiRadius);
int iGreen2 = MoveAwayFromEdge(frgbaQuantizedColor2.IntGreen(15.0f), a_uiRadius);
int iBlue2 = MoveAwayFromEdge(frgbaQuantizedColor2.IntBlue(15.0f), a_uiRadius);
m_half1.Init(iRed1, iGreen1, iBlue1, a_pauiPixelMapping1, a_uiRadius);
m_half2.Init(iRed2, iGreen2, iBlue2, a_pauiPixelMapping2, a_uiRadius);
}
// ----------------------------------------------------------------------------------------------------
//
void IndividualTrys::Half::Init(int a_iRed, int a_iGreen, int a_iBlue,
const unsigned int *a_pauiPixelMapping, unsigned int a_uiRadius)
{
m_iRed = a_iRed;
m_iGreen = a_iGreen;
m_iBlue = a_iBlue;
m_pauiPixelMapping = a_pauiPixelMapping;
m_uiRadius = a_uiRadius;
m_uiTrys = 0;
}
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "EtcColorFloatRGBA.h"
namespace Etc
{
class IndividualTrys
{
public:
static const unsigned int MAX_RADIUS = 1;
IndividualTrys(ColorFloatRGBA a_frgbaColor1,
ColorFloatRGBA a_frgbaColor2,
const unsigned int *a_pauiPixelMapping1,
const unsigned int *a_pauiPixelMapping2,
unsigned int a_uiRadius);
inline static int MoveAwayFromEdge(int a_i, int a_iDistance)
{
if (a_i < (0+ a_iDistance))
{
return (0 + a_iDistance);
}
else if (a_i > (15- a_iDistance))
{
return (15 - a_iDistance);
}
return a_i;
}
class Try
{
public :
static const unsigned int SELECTORS = 8; // per half
int m_iRed;
int m_iGreen;
int m_iBlue;
unsigned int m_uiCW;
unsigned int m_auiSelectors[SELECTORS];
float m_fError;
};
class Half
{
public:
static const unsigned int MAX_TRYS = 27;
void Init(int a_iRed, int a_iGreen, int a_iBlue,
const unsigned int *a_pauiPixelMapping,
unsigned int a_uiRadius);
// center of trys
int m_iRed;
int m_iGreen;
int m_iBlue;
const unsigned int *m_pauiPixelMapping;
unsigned int m_uiRadius;
unsigned int m_uiTrys;
Try m_atry[MAX_TRYS];
Try *m_ptryBest;
};
Half m_half1;
Half m_half2;
};
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "EtcConfig.h"
#include "EtcMath.h"
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
// calculate the line that best fits the set of XY points contained in a_afX[] and a_afY[]
// use a_fSlope and a_fOffset to define that line
//
bool Regression(float a_afX[], float a_afY[], unsigned int a_Points,
float *a_fSlope, float *a_fOffset)
{
float fPoints = (float)a_Points;
float fSumX = 0.0f;
float fSumY = 0.0f;
float fSumXY = 0.0f;
float fSumX2 = 0.0f;
for (unsigned int uiPoint = 0; uiPoint < a_Points; uiPoint++)
{
fSumX += a_afX[uiPoint];
fSumY += a_afY[uiPoint];
fSumXY += a_afX[uiPoint] * a_afY[uiPoint];
fSumX2 += a_afX[uiPoint] * a_afX[uiPoint];
}
float fDivisor = fPoints*fSumX2 - fSumX*fSumX;
// if vertical line
if (fDivisor == 0.0f)
{
*a_fSlope = 0.0f;
*a_fOffset = 0.0f;
return true;
}
*a_fSlope = (fPoints*fSumXY - fSumX*fSumY) / fDivisor;
*a_fOffset = (fSumY - (*a_fSlope)*fSumX) / fPoints;
return false;
}
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <math.h>
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
// return true if vertical line
bool Regression(float a_afX[], float a_afY[], unsigned int a_Points,
float *a_fSlope, float *a_fOffset);
inline float ConvertMSEToPSNR(float a_fMSE)
{
if (a_fMSE == 0.0f)
{
return INFINITY;
}
return 10.0f * log10f(1.0f / a_fMSE);
}
}

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
EtcSortedBlockList.cpp
SortedBlockList is a list of 4x4 blocks that can be used by the "effort" system to prioritize
the encoding of the 4x4 blocks.
The sorting is done with buckets, where each bucket is an indication of how much error each 4x4 block has
*/
#include "EtcConfig.h"
#include "EtcSortedBlockList.h"
#include "EtcBlock4x4.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
namespace Etc
{
// ----------------------------------------------------------------------------------------------------
// construct an empty list
//
// allocate enough memory to add all of the image's 4x4 blocks later
// allocate enough buckets to sort the blocks
//
SortedBlockList::SortedBlockList(unsigned int a_uiImageBlocks, unsigned int a_uiBuckets)
{
m_uiImageBlocks = a_uiImageBlocks;
m_iBuckets = (int)a_uiBuckets;
m_uiAddedBlocks = 0;
m_uiSortedBlocks = 0;
m_palinkPool = new Link[m_uiImageBlocks];
m_pabucket = new Bucket[m_iBuckets];
m_fMaxError = 0.0f;
InitBuckets();
}
// ----------------------------------------------------------------------------------------------------
//
SortedBlockList::~SortedBlockList(void)
{
delete[] m_palinkPool;
delete[] m_pabucket;
}
// ----------------------------------------------------------------------------------------------------
// add a 4x4 block to the list
// the 4x4 block will be sorted later
//
void SortedBlockList::AddBlock(Block4x4 *a_pblock)
{
assert(m_uiAddedBlocks < m_uiImageBlocks);
Link *plink = &m_palinkPool[m_uiAddedBlocks++];
plink->Init(a_pblock);
}
// ----------------------------------------------------------------------------------------------------
// sort all of the 4x4 blocks that have been added to the list
//
// first, determine the maximum error, then assign an error range to each bucket
// next, determine which bucket each 4x4 block belongs to based on the 4x4 block's error
// add the 4x4 block to the appropriate bucket
// lastly, walk thru the buckets and add each bucket to a sorted linked list
//
// the resultant sorting is an approximate sorting from most to least error
//
void SortedBlockList::Sort(void)
{
assert(m_uiAddedBlocks == m_uiImageBlocks);
InitBuckets();
// find max block error
m_fMaxError = -1.0f;
for (unsigned int uiLink = 0; uiLink < m_uiAddedBlocks; uiLink++)
{
Link *plinkBlock = &m_palinkPool[uiLink];
float fBlockError = plinkBlock->GetBlock()->GetError();
if (fBlockError > m_fMaxError)
{
m_fMaxError = fBlockError;
}
}
// prevent divide by zero or divide by negative
if (m_fMaxError <= 0.0f)
{
m_fMaxError = 1.0f;
}
//used for debugging
//int numDone = 0;
// put all of the blocks with unfinished encodings into the appropriate bucket
m_uiSortedBlocks = 0;
for (unsigned int uiLink = 0; uiLink < m_uiAddedBlocks; uiLink++)
{
Link *plinkBlock = &m_palinkPool[uiLink];
// if the encoding is done, don't add it to the list
if (plinkBlock->GetBlock()->GetEncoding()->IsDone())
{
//numDone++;
continue;
}
// calculate the appropriate sort bucket
float fBlockError = plinkBlock->GetBlock()->GetError();
int iBucket = (int) floorf(m_iBuckets * fBlockError / m_fMaxError);
// clamp to bucket index
iBucket = iBucket < 0 ? 0 : iBucket >= m_iBuckets ? m_iBuckets - 1 : iBucket;
// add block to bucket
{
Bucket *pbucket = &m_pabucket[iBucket];
if (pbucket->plinkLast)
{
pbucket->plinkLast->SetNext(plinkBlock);
pbucket->plinkLast = plinkBlock;
}
else
{
pbucket->plinkFirst = pbucket->plinkLast = plinkBlock;
}
plinkBlock->SetNext(nullptr);
}
m_uiSortedBlocks++;
if (0)
{
printf("%u: e=%.3f\n", uiLink, fBlockError);
Print();
printf("\n\n\n");
}
}
//printf("num blocks already done: %d\n",numDone);
//link the blocks together across buckets
m_plinkFirst = nullptr;
m_plinkLast = nullptr;
for (int iBucket = m_iBuckets - 1; iBucket >= 0; iBucket--)
{
Bucket *pbucket = &m_pabucket[iBucket];
if (pbucket->plinkFirst)
{
if (m_plinkFirst == nullptr)
{
m_plinkFirst = pbucket->plinkFirst;
}
else
{
assert(pbucket->plinkLast->GetNext() == nullptr);
m_plinkLast->SetNext(pbucket->plinkFirst);
}
m_plinkLast = pbucket->plinkLast;
}
}
}
// ----------------------------------------------------------------------------------------------------
// clear all of the buckets. normally done in preparation for a sort
//
void SortedBlockList::InitBuckets(void)
{
for (int iBucket = 0; iBucket < m_iBuckets; iBucket++)
{
Bucket *pbucket = &m_pabucket[iBucket];
pbucket->plinkFirst = 0;
pbucket->plinkLast = 0;
}
}
// ----------------------------------------------------------------------------------------------------
// print out the list of sorted 4x4 blocks
// normally used for debugging
//
void SortedBlockList::Print(void)
{
for (int iBucket = m_iBuckets-1; iBucket >= 0; iBucket--)
{
Bucket *pbucket = &m_pabucket[iBucket];
unsigned int uiBlocks = 0;
for (Link *plink = pbucket->plinkFirst; plink != nullptr; plink = plink->GetNext() )
{
uiBlocks++;
if (plink == pbucket->plinkLast)
{
break;
}
}
float fBucketError = m_fMaxError * iBucket / m_iBuckets;
float fBucketRMS = sqrtf(fBucketError / (4.0f*16.0f) );
printf("%3d: e=%.3f rms=%.6f %u\n", iBucket, fBucketError, fBucketRMS, uiBlocks);
}
}
// ----------------------------------------------------------------------------------------------------
//
} // namespace Etc

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/*
* Copyright 2015 The Etc2Comp Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
namespace Etc
{
class Block4x4;
class SortedBlockList
{
public:
class Link
{
public:
inline void Init(Block4x4 *a_pblock)
{
m_pblock = a_pblock;
m_plinkNext = nullptr;
}
inline Block4x4 * GetBlock(void)
{
return m_pblock;
}
inline void SetNext(Link *a_plinkNext)
{
m_plinkNext = a_plinkNext;
}
inline Link * GetNext(void)
{
return m_plinkNext;
}
inline Link * Advance(unsigned int a_uiSteps = 1)
{
Link *plink = this;
for (unsigned int uiStep = 0; uiStep < a_uiSteps; uiStep++)
{
if (plink == nullptr)
{
break;
}
plink = plink->m_plinkNext;
}
return plink;
}
private:
Block4x4 *m_pblock;
Link *m_plinkNext;
};
SortedBlockList(unsigned int a_uiImageBlocks, unsigned int a_uiBuckets);
~SortedBlockList(void);
void AddBlock(Block4x4 *a_pblock);
void Sort(void);
inline Link * GetLinkToFirstBlock(void)
{
return m_plinkFirst;
}
inline unsigned int GetNumberOfAddedBlocks(void)
{
return m_uiAddedBlocks;
}
inline unsigned int GetNumberOfSortedBlocks(void)
{
return m_uiSortedBlocks;
}
void Print(void);
private:
void InitBuckets(void);
class Bucket
{
public:
Link *plinkFirst;
Link *plinkLast;
};
unsigned int m_uiImageBlocks;
int m_iBuckets;
unsigned int m_uiAddedBlocks;
unsigned int m_uiSortedBlocks;
Link *m_palinkPool;
Bucket *m_pabucket;
float m_fMaxError;
Link *m_plinkFirst;
Link *m_plinkLast;
};
} // namespace Etc

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# Etc2Comp - Texture to ETC2 compressor
Etc2Comp is a command line tool that converts textures (e.g. bitmaps)
into the [ETC2](https://en.wikipedia.org/wiki/Ericsson_Texture_Compression)
format. The tool is built with a focus on encoding performance
to reduce the amount of time required to compile asset heavy applications as
well as reduce overall application size.
This repo provides source code that can be compiled into a binary. The
binary can then be used to convert textures to the ETC2 format.
Important: This is not an official Google product. It is an experimental
library published as-is. Please see the CONTRIBUTORS.md file for information
about questions or issues.
## Setup
This project uses [CMake](https://cmake.org/) to generate platform-specific
build files:
- Linux: make files
- OS X: Xcode workspace files
- Microsoft Windows: Visual Studio solution files
- Note: CMake supports other formats, but this doc only provides steps for
one of each platform for brevity.
Refer to each platform's setup section to setup your environment and build
an Etc2Comp binary. Then skip to the usage section of this page for examples
of how to use the library.
### Setup for OS X
build tested on this config:
OS X 10.9.5 i7 16GB RAM
Xcode 5.1.1
cmake 3.2.3
Start by downloading and installing the following components if they are not
already installed on your development machine.
- *Xcode* version 5.1.1, or greater
- [CMake](https://cmake.org/download/) version 3.2.3, or greater
To build the Etc2Comp binary:
1. Open a *Terminal* window and navigate to the project directory.
1. Run `mkdir build_xcode`
1. Run `cd build_xcode`
1. Run `cmake -G Xcode ../`
1. Open *Xcode* and import the `build_xcode/EtcTest.xcodeproj` file.
1. Open the Product menu and choose Build For -> Running.
1. Once the build succeeds the binary located at `build_xcode/EtcTool/Debug/EtcTool`
can be executed.
Optional
Xcode EtcTool ‘Run’ preferences
note: if the build_xcode/EtcTest.xcodeproj is manually deleted then some Xcode preferences
will need to be set by hand after cmake is run (these prefs are retained across
cmake updates if the .xcodeproj is not deleted/removed)
1. Set the active scheme to ‘EtcTool’
1. Edit the scheme
1. Select option ‘Run EtcTool’, then tab ‘Arguments’.
Add this launch argument: ‘-argfile ../../EtcTool/args.txt’
1. Select tab ‘Options’ and set a custom working directory to: ‘$(SRCROOT)/Build_Xcode/EtcTool’
### SetUp for Windows
1. Open a *Terminal* window and navigate to the project directory.
1. Run `mkdir build_vs`
1. Run `cd build_vs`
1. Run CMAKE, noting what build version you need, and pointing to the parent directory as the source root;
For VS 2013 : `cmake -G "Visual Studio 12 2013 Win64" ../`
For VS 2015 : `cmake -G "Visual Studio 14 2015 Win64" ../`
NOTE: To see what supported Visual Studio outputs there are, run `cmake -G`
1. open the 'EtcTest' solution
1. make the 'EtcTool' project the start up project
1. (optional) in the project properties, under 'Debugging ->command arguments'
add the argfile textfile thats included in the EtcTool directory.
example: -argfile C:\etc2\EtcTool\Args.txt
### Setup For Linux
The Linux build was tested on this config:
Ubuntu desktop 14.04
gcc/g++ 4.8
cmake 2.8.12.2
1. Verify linux has cmake and C++-11 capable g++ installed
1. Open shell
1. Run `mkdir build_linux`
1. Run `cd build_linux`
1. Run `cmake ../`
1. Run `make`
1. navigate to the newly created EtcTool directory `cd EtcTool`
1. run the executable: `./EtcTool -argfile ../../EtcTool/args.txt`
Skip to the <a href="#usage">Usage</a> section for more information about using the
tool.
## Usage
### Command Line Usage
EtcTool can be run from the command line with the following usage:
etctool.exe source_image [options ...] -output encoded_image
The encoder will use an array of RGBA floats read from the source_image to create
an ETC1 or ETC2 encoded image in encoded_image. The RGBA floats should be in the
range [0:1].
Options:
-analyze <analysis_folder>
-argfile <arg_file> additional command line arguments read from a file
-blockAtHV <H V> encodes a single block that contains the
pixel specified by the H V coordinates
-compare <comparison_image> compares source_image to comparison_image
-effort <amount> number between 0 and 100 to specify the encoding quality
(100 is the highest quality)
-errormetric <error_metric> specify the error metric, the options are
rgba, rgbx, rec709, numeric and normalxyz
-format <etc_format> ETC1, RGB8, SRGB8, RGBA8, SRGB8, RGB8A1,
SRGB8A1 or R11
-help prints this message
-jobs or -j <thread_count> specifies the number of threads (default=1)
-normalizexyz normalize RGB to have a length of 1
-verbose or -v shows status information during the encoding
process
-mipmaps or -m <mip_count> sets the maximum number of mipaps to generate (default=1)
-mipwrap or -w <x|y|xy> sets the mipmap filter wrap mode (default=clamp)
* -analyze will run an analysis of the encoding and place it in folder
"analysis_folder" (e.g. ../analysis/kodim05). within the analysis_folder, a folder
will be created with a name of the current date/time (e.g. 20151204_153306). this
date/time folder is used to compare encodings of the same texture over time.
within the date/time folder is a text file with several encoding stats and a 2x png
image showing the encoding mode for each 4x4 block.
* -argfile allows additional command line arguments to be placed in a text file
* -blockAtHV selects the 4x4 pixel subset of the source image at position (H,V).
This is mainly used for debugging
* -compare compares the source image to the created encoded image. The encoding
will dictate what error analysis is used in the comparison.
* -effort uses an "amount" between 0 and 100 to determine how much additional effort
to apply during the encoding.
* -errormetric selects the fitting algorithm used by the encoder. "rgba" calculates
RMS error using RGB components that are weighted by A. "rgbx" calculates RMS error
using RGBA components, where A is treated as an additional data channel, instead of
as alpha. "rec709" is similar to "rgba", except the RGB components are also weighted
according to Rec709. "numeric" calculates RMS error using unweighted RGBA components.
"normalize" calculates error based on dot product and vector length for RGB and RMS
error for A.
* -help prints out the usage message
* -jobs enables multi-threading to speed up image encoding
* -normalizexyz normalizes the source RGB to have a length of 1.
* -verbose shows information on the current encoding process. It will then display the
PSNR and time time it took to encode the image.
* -mipmaps takes an argument that specifies how many mipmaps to generate from the
source image. The mipmaps are generated with a lanczos3 filter using edge clamping.
If the mipmaps option is not specified no mipmaps are created.
* -mipwrap takes an argument that specifies the mipmap filter wrap mode. The options
are "x", "y" and "xy" which specify wrapping in x only, y only or x and y respectively.
The default options are clamping in both x and y.
Note: Path names can use slashes or backslashes. The tool will convert the
slashes to the appropriate polarity for the current platform.
## API
The library supports two different APIs - a C-like API that is not heavily
class-based and a class-based API.
main() in EtcTool.cpp contains an example of both APIs.
The Encode() method now returns an EncodingStatus that contains bit flags for
reporting various warnings and flags encountered when encoding.
## Copyright
Copyright 2015 Etc2Comp Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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thirdparty/etc2comp/patches/fix-rgba8-max-channels.patch vendored
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@ -1,224 +0,0 @@
diff --git a/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8.cpp b/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8.cpp
index 5656556db9..5c7ebed788 100644
--- a/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8.cpp
+++ b/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8.cpp
@@ -508,7 +508,7 @@ namespace Etc
int iMaxRed1 = iColor1Red + (int)a_uiRadius;
if (iMaxRed1 > 15)
{
- iMinRed1 = 15;
+ iMaxRed1 = 15;
}
int iMinGreen1 = iColor1Green - (int)a_uiRadius;
@@ -519,7 +519,7 @@ namespace Etc
int iMaxGreen1 = iColor1Green + (int)a_uiRadius;
if (iMaxGreen1 > 15)
{
- iMinGreen1 = 15;
+ iMaxGreen1 = 15;
}
int iMinBlue1 = iColor1Blue - (int)a_uiRadius;
@@ -530,7 +530,7 @@ namespace Etc
int iMaxBlue1 = iColor1Blue + (int)a_uiRadius;
if (iMaxBlue1 > 15)
{
- iMinBlue1 = 15;
+ iMaxBlue1 = 15;
}
int iColor2Red = m_frgbaOriginalColor2_TAndH.IntRed(15.0f);
@@ -545,7 +545,7 @@ namespace Etc
int iMaxRed2 = iColor2Red + (int)a_uiRadius;
if (iMaxRed2 > 15)
{
- iMinRed2 = 15;
+ iMaxRed2 = 15;
}
int iMinGreen2 = iColor2Green - (int)a_uiRadius;
@@ -556,7 +556,7 @@ namespace Etc
int iMaxGreen2 = iColor2Green + (int)a_uiRadius;
if (iMaxGreen2 > 15)
{
- iMinGreen2 = 15;
+ iMaxGreen2 = 15;
}
int iMinBlue2 = iColor2Blue - (int)a_uiRadius;
@@ -567,7 +567,7 @@ namespace Etc
int iMaxBlue2 = iColor2Blue + (int)a_uiRadius;
if (iMaxBlue2 > 15)
{
- iMinBlue2 = 15;
+ iMaxBlue2 = 15;
}
for (unsigned int uiDistance = 0; uiDistance < TH_DISTANCES; uiDistance++)
@@ -761,7 +761,7 @@ namespace Etc
int iMaxRed1 = iColor1Red + (int)a_uiRadius;
if (iMaxRed1 > 15)
{
- iMinRed1 = 15;
+ iMaxRed1 = 15;
}
int iMinGreen1 = iColor1Green - (int)a_uiRadius;
@@ -772,7 +772,7 @@ namespace Etc
int iMaxGreen1 = iColor1Green + (int)a_uiRadius;
if (iMaxGreen1 > 15)
{
- iMinGreen1 = 15;
+ iMaxGreen1 = 15;
}
int iMinBlue1 = iColor1Blue - (int)a_uiRadius;
@@ -783,7 +783,7 @@ namespace Etc
int iMaxBlue1 = iColor1Blue + (int)a_uiRadius;
if (iMaxBlue1 > 15)
{
- iMinBlue1 = 15;
+ iMaxBlue1 = 15;
}
int iColor2Red = m_frgbaOriginalColor2_TAndH.IntRed(15.0f);
@@ -798,7 +798,7 @@ namespace Etc
int iMaxRed2 = iColor2Red + (int)a_uiRadius;
if (iMaxRed2 > 15)
{
- iMinRed2 = 15;
+ iMaxRed2 = 15;
}
int iMinGreen2 = iColor2Green - (int)a_uiRadius;
@@ -809,7 +809,7 @@ namespace Etc
int iMaxGreen2 = iColor2Green + (int)a_uiRadius;
if (iMaxGreen2 > 15)
{
- iMinGreen2 = 15;
+ iMaxGreen2 = 15;
}
int iMinBlue2 = iColor2Blue - (int)a_uiRadius;
@@ -820,7 +820,7 @@ namespace Etc
int iMaxBlue2 = iColor2Blue + (int)a_uiRadius;
if (iMaxBlue2 > 15)
{
- iMinBlue2 = 15;
+ iMaxBlue2 = 15;
}
for (unsigned int uiDistance = 0; uiDistance < TH_DISTANCES; uiDistance++)
diff --git a/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.cpp b/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.cpp
index ba2b42fb05..b94b64e68c 100644
--- a/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.cpp
+++ b/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.cpp
@@ -847,7 +847,7 @@ namespace Etc
int iMaxRed1 = iColor1Red + (int)a_uiRadius;
if (iMaxRed1 > 15)
{
- iMinRed1 = 15;
+ iMaxRed1 = 15;
}
int iMinGreen1 = iColor1Green - (int)a_uiRadius;
@@ -858,7 +858,7 @@ namespace Etc
int iMaxGreen1 = iColor1Green + (int)a_uiRadius;
if (iMaxGreen1 > 15)
{
- iMinGreen1 = 15;
+ iMaxGreen1 = 15;
}
int iMinBlue1 = iColor1Blue - (int)a_uiRadius;
@@ -869,7 +869,7 @@ namespace Etc
int iMaxBlue1 = iColor1Blue + (int)a_uiRadius;
if (iMaxBlue1 > 15)
{
- iMinBlue1 = 15;
+ iMaxBlue1 = 15;
}
int iColor2Red = m_frgbaOriginalColor2_TAndH.IntRed(15.0f);
@@ -884,7 +884,7 @@ namespace Etc
int iMaxRed2 = iColor2Red + (int)a_uiRadius;
if (iMaxRed2 > 15)
{
- iMinRed2 = 15;
+ iMaxRed2 = 15;
}
int iMinGreen2 = iColor2Green - (int)a_uiRadius;
@@ -895,7 +895,7 @@ namespace Etc
int iMaxGreen2 = iColor2Green + (int)a_uiRadius;
if (iMaxGreen2 > 15)
{
- iMinGreen2 = 15;
+ iMaxGreen2 = 15;
}
int iMinBlue2 = iColor2Blue - (int)a_uiRadius;
@@ -906,7 +906,7 @@ namespace Etc
int iMaxBlue2 = iColor2Blue + (int)a_uiRadius;
if (iMaxBlue2 > 15)
{
- iMinBlue2 = 15;
+ iMaxBlue2 = 15;
}
for (unsigned int uiDistance = 0; uiDistance < TH_DISTANCES; uiDistance++)
@@ -1108,7 +1108,7 @@ namespace Etc
int iMaxRed1 = iColor1Red + (int)a_uiRadius;
if (iMaxRed1 > 15)
{
- iMinRed1 = 15;
+ iMaxRed1 = 15;
}
int iMinGreen1 = iColor1Green - (int)a_uiRadius;
@@ -1119,7 +1119,7 @@ namespace Etc
int iMaxGreen1 = iColor1Green + (int)a_uiRadius;
if (iMaxGreen1 > 15)
{
- iMinGreen1 = 15;
+ iMaxGreen1 = 15;
}
int iMinBlue1 = iColor1Blue - (int)a_uiRadius;
@@ -1130,7 +1130,7 @@ namespace Etc
int iMaxBlue1 = iColor1Blue + (int)a_uiRadius;
if (iMaxBlue1 > 15)
{
- iMinBlue1 = 15;
+ iMaxBlue1 = 15;
}
int iColor2Red = m_frgbaOriginalColor2_TAndH.IntRed(15.0f);
@@ -1145,7 +1145,7 @@ namespace Etc
int iMaxRed2 = iColor2Red + (int)a_uiRadius;
if (iMaxRed2 > 15)
{
- iMinRed2 = 15;
+ iMaxRed2 = 15;
}
int iMinGreen2 = iColor2Green - (int)a_uiRadius;
@@ -1156,7 +1156,7 @@ namespace Etc
int iMaxGreen2 = iColor2Green + (int)a_uiRadius;
if (iMaxGreen2 > 15)
{
- iMinGreen2 = 15;
+ iMaxGreen2 = 15;
}
int iMinBlue2 = iColor2Blue - (int)a_uiRadius;
@@ -1167,7 +1167,7 @@ namespace Etc
int iMaxBlue2 = iColor2Blue + (int)a_uiRadius;
if (iMaxBlue2 > 15)
{
- iMinBlue2 = 15;
+ iMaxBlue2 = 15;
}
for (unsigned int uiDistance = 0; uiDistance < TH_DISTANCES; uiDistance++)

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thirdparty/etcpak/AUTHORS.txt vendored Normal file
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@ -0,0 +1,3 @@
Bartosz Taudul <wolf@nereid.pl>
Daniel Jungmann <el.3d.source@gmail.com>
Florian Penzkofer <fp@nullptr.de>

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@ -0,0 +1,216 @@
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <png.h>
#include "lz4/lz4.h"
#include "Bitmap.hpp"
#include "Debug.hpp"
Bitmap::Bitmap( const char* fn, unsigned int lines, bool bgr )
: m_block( nullptr )
, m_lines( lines )
, m_alpha( true )
, m_sema( 0 )
{
FILE* f = fopen( fn, "rb" );
assert( f );
char buf[4];
fread( buf, 1, 4, f );
if( memcmp( buf, "raw4", 4 ) == 0 )
{
uint8_t a;
fread( &a, 1, 1, f );
m_alpha = a == 1;
uint32_t d;
fread( &d, 1, 4, f );
m_size.x = d;
fread( &d, 1, 4, f );
m_size.y = d;
DBGPRINT( "Raw bitmap " << fn << " " << m_size.x << "x" << m_size.y );
assert( m_size.x % 4 == 0 );
assert( m_size.y % 4 == 0 );
int32_t csize;
fread( &csize, 1, 4, f );
char* cbuf = new char[csize];
fread( cbuf, 1, csize, f );
fclose( f );
m_block = m_data = new uint32_t[m_size.x*m_size.y];
m_linesLeft = m_size.y / 4;
LZ4_decompress_fast( cbuf, (char*)m_data, m_size.x*m_size.y*4 );
delete[] cbuf;
for( int i=0; i<m_size.y/4; i++ )
{
m_sema.unlock();
}
}
else
{
fseek( f, 0, SEEK_SET );
unsigned int sig_read = 0;
int bit_depth, color_type, interlace_type;
png_structp png_ptr = png_create_read_struct( PNG_LIBPNG_VER_STRING, NULL, NULL, NULL );
png_infop info_ptr = png_create_info_struct( png_ptr );
setjmp( png_jmpbuf( png_ptr ) );
png_init_io( png_ptr, f );
png_set_sig_bytes( png_ptr, sig_read );
png_uint_32 w, h;
png_read_info( png_ptr, info_ptr );
png_get_IHDR( png_ptr, info_ptr, &w, &h, &bit_depth, &color_type, &interlace_type, NULL, NULL );
m_size = v2i( w, h );
png_set_strip_16( png_ptr );
if( color_type == PNG_COLOR_TYPE_PALETTE )
{
png_set_palette_to_rgb( png_ptr );
}
else if( color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8 )
{
png_set_expand_gray_1_2_4_to_8( png_ptr );
}
if( png_get_valid( png_ptr, info_ptr, PNG_INFO_tRNS ) )
{
png_set_tRNS_to_alpha( png_ptr );
}
if( color_type == PNG_COLOR_TYPE_GRAY_ALPHA )
{
png_set_gray_to_rgb(png_ptr);
}
if( bgr )
{
png_set_bgr(png_ptr);
}
switch( color_type )
{
case PNG_COLOR_TYPE_PALETTE:
if( !png_get_valid( png_ptr, info_ptr, PNG_INFO_tRNS ) )
{
png_set_filler( png_ptr, 0xff, PNG_FILLER_AFTER );
m_alpha = false;
}
break;
case PNG_COLOR_TYPE_GRAY_ALPHA:
png_set_gray_to_rgb( png_ptr );
break;
case PNG_COLOR_TYPE_RGB:
png_set_filler( png_ptr, 0xff, PNG_FILLER_AFTER );
m_alpha = false;
break;
default:
break;
}
DBGPRINT( "Bitmap " << fn << " " << w << "x" << h );
assert( w % 4 == 0 );
assert( h % 4 == 0 );
m_block = m_data = new uint32_t[w*h];
m_linesLeft = h / 4;
m_load = std::async( std::launch::async, [this, f, png_ptr, info_ptr]() mutable
{
auto ptr = m_data;
unsigned int lines = 0;
for( int i=0; i<m_size.y / 4; i++ )
{
for( int j=0; j<4; j++ )
{
png_read_rows( png_ptr, (png_bytepp)&ptr, NULL, 1 );
ptr += m_size.x;
}
lines++;
if( lines >= m_lines )
{
lines = 0;
m_sema.unlock();
}
}
if( lines != 0 )
{
m_sema.unlock();
}
png_read_end( png_ptr, info_ptr );
png_destroy_read_struct( &png_ptr, &info_ptr, NULL );
fclose( f );
} );
}
}
Bitmap::Bitmap( const v2i& size )
: m_data( new uint32_t[size.x*size.y] )
, m_block( nullptr )
, m_lines( 1 )
, m_linesLeft( size.y / 4 )
, m_size( size )
, m_sema( 0 )
{
}
Bitmap::Bitmap( const Bitmap& src, unsigned int lines )
: m_lines( lines )
, m_alpha( src.Alpha() )
, m_sema( 0 )
{
}
Bitmap::~Bitmap()
{
delete[] m_data;
}
void Bitmap::Write( const char* fn )
{
FILE* f = fopen( fn, "wb" );
assert( f );
png_structp png_ptr = png_create_write_struct( PNG_LIBPNG_VER_STRING, NULL, NULL, NULL );
png_infop info_ptr = png_create_info_struct( png_ptr );
setjmp( png_jmpbuf( png_ptr ) );
png_init_io( png_ptr, f );
png_set_IHDR( png_ptr, info_ptr, m_size.x, m_size.y, 8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE );
png_write_info( png_ptr, info_ptr );
uint32_t* ptr = m_data;
for( int i=0; i<m_size.y; i++ )
{
png_write_rows( png_ptr, (png_bytepp)(&ptr), 1 );
ptr += m_size.x;
}
png_write_end( png_ptr, info_ptr );
png_destroy_write_struct( &png_ptr, &info_ptr );
fclose( f );
}
const uint32_t* Bitmap::NextBlock( unsigned int& lines, bool& done )
{
std::lock_guard<std::mutex> lock( m_lock );
lines = std::min( m_lines, m_linesLeft );
auto ret = m_block;
m_sema.lock();
m_block += m_size.x * 4 * lines;
m_linesLeft -= lines;
done = m_linesLeft == 0;
return ret;
}

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thirdparty/etcpak/Bitmap.hpp vendored Normal file
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#ifndef __DARKRL__BITMAP_HPP__
#define __DARKRL__BITMAP_HPP__
#include <future>
#include <memory>
#include <mutex>
#include <stdint.h>
#include "Semaphore.hpp"
#include "Vector.hpp"
enum class Channels
{
RGB,
Alpha
};
class Bitmap
{
public:
Bitmap( const char* fn, unsigned int lines, bool bgr );
Bitmap( const v2i& size );
virtual ~Bitmap();
void Write( const char* fn );
uint32_t* Data() { if( m_load.valid() ) m_load.wait(); return m_data; }
const uint32_t* Data() const { if( m_load.valid() ) m_load.wait(); return m_data; }
const v2i& Size() const { return m_size; }
bool Alpha() const { return m_alpha; }
const uint32_t* NextBlock( unsigned int& lines, bool& done );
protected:
Bitmap( const Bitmap& src, unsigned int lines );
uint32_t* m_data;
uint32_t* m_block;
unsigned int m_lines;
unsigned int m_linesLeft;
v2i m_size;
bool m_alpha;
Semaphore m_sema;
std::mutex m_lock;
std::future<void> m_load;
};
typedef std::shared_ptr<Bitmap> BitmapPtr;
#endif

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#include <string.h>
#include <utility>
#include "BitmapDownsampled.hpp"
#include "Debug.hpp"
BitmapDownsampled::BitmapDownsampled( const Bitmap& bmp, unsigned int lines )
: Bitmap( bmp, lines )
{
m_size.x = std::max( 1, bmp.Size().x / 2 );
m_size.y = std::max( 1, bmp.Size().y / 2 );
int w = std::max( m_size.x, 4 );
int h = std::max( m_size.y, 4 );
DBGPRINT( "Subbitmap " << m_size.x << "x" << m_size.y );
m_block = m_data = new uint32_t[w*h];
if( m_size.x < w || m_size.y < h )
{
memset( m_data, 0, w*h*sizeof( uint32_t ) );
m_linesLeft = h / 4;
unsigned int lines = 0;
for( int i=0; i<h/4; i++ )
{
for( int j=0; j<4; j++ )
{
lines++;
if( lines > m_lines )
{
lines = 0;
m_sema.unlock();
}
}
}
if( lines != 0 )
{
m_sema.unlock();
}
}
else
{
m_linesLeft = h / 4;
m_load = std::async( std::launch::async, [this, &bmp, w, h]() mutable
{
auto ptr = m_data;
auto src1 = bmp.Data();
auto src2 = src1 + bmp.Size().x;
unsigned int lines = 0;
for( int i=0; i<h/4; i++ )
{
for( int j=0; j<4; j++ )
{
for( int k=0; k<m_size.x; k++ )
{
int r = ( ( *src1 & 0x000000FF ) + ( *(src1+1) & 0x000000FF ) + ( *src2 & 0x000000FF ) + ( *(src2+1) & 0x000000FF ) ) / 4;
int g = ( ( ( *src1 & 0x0000FF00 ) + ( *(src1+1) & 0x0000FF00 ) + ( *src2 & 0x0000FF00 ) + ( *(src2+1) & 0x0000FF00 ) ) / 4 ) & 0x0000FF00;
int b = ( ( ( *src1 & 0x00FF0000 ) + ( *(src1+1) & 0x00FF0000 ) + ( *src2 & 0x00FF0000 ) + ( *(src2+1) & 0x00FF0000 ) ) / 4 ) & 0x00FF0000;
int a = ( ( ( ( ( *src1 & 0xFF000000 ) >> 8 ) + ( ( *(src1+1) & 0xFF000000 ) >> 8 ) + ( ( *src2 & 0xFF000000 ) >> 8 ) + ( ( *(src2+1) & 0xFF000000 ) >> 8 ) ) / 4 ) & 0x00FF0000 ) << 8;
*ptr++ = r | g | b | a;
src1 += 2;
src2 += 2;
}
src1 += m_size.x * 2;
src2 += m_size.x * 2;
}
lines++;
if( lines >= m_lines )
{
lines = 0;
m_sema.unlock();
}
}
if( lines != 0 )
{
m_sema.unlock();
}
} );
}
}
BitmapDownsampled::~BitmapDownsampled()
{
}

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#ifndef __DARKRL__BITMAPDOWNSAMPLED_HPP__
#define __DARKRL__BITMAPDOWNSAMPLED_HPP__
#include "Bitmap.hpp"
class BitmapDownsampled : public Bitmap
{
public:
BitmapDownsampled( const Bitmap& bmp, unsigned int lines );
~BitmapDownsampled();
};
#endif

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#ifndef __BLOCKDATA_HPP__
#define __BLOCKDATA_HPP__
#include <condition_variable>
#include <future>
#include <memory>
#include <mutex>
#include <stdint.h>
#include <stdio.h>
#include <vector>
#include "Bitmap.hpp"
#include "ForceInline.hpp"
#include "Vector.hpp"
class BlockData
{
public:
enum Type
{
Etc1,
Etc2_RGB,
Etc2_RGBA,
Dxt1,
Dxt5
};
BlockData( const char* fn );
BlockData( const char* fn, const v2i& size, bool mipmap, Type type );
BlockData( const v2i& size, bool mipmap, Type type );
~BlockData();
BitmapPtr Decode();
void Process( const uint32_t* src, uint32_t blocks, size_t offset, size_t width, Channels type, bool dither );
void ProcessRGBA( const uint32_t* src, uint32_t blocks, size_t offset, size_t width );
const v2i& Size() const { return m_size; }
private:
etcpak_no_inline BitmapPtr DecodeRGB();
etcpak_no_inline BitmapPtr DecodeRGBA();
etcpak_no_inline BitmapPtr DecodeDxt1();
etcpak_no_inline BitmapPtr DecodeDxt5();
uint8_t* m_data;
v2i m_size;
size_t m_dataOffset;
FILE* m_file;
size_t m_maplen;
Type m_type;
};
typedef std::shared_ptr<BlockData> BlockDataPtr;
#endif

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#include <math.h>
#include <stdint.h>
#include "Math.hpp"
#include "ColorSpace.hpp"
namespace Color
{
static const XYZ white( v3b( 255, 255, 255 ) );
static const v3f rwhite( 1.f / white.x, 1.f / white.y, 1.f / white.z );
XYZ::XYZ( float _x, float _y, float _z )
: x( _x )
, y( _y )
, z( _z )
{
}
XYZ::XYZ( const v3b& rgb )
{
const float r = rgb.x / 255.f;
const float g = rgb.y / 255.f;
const float b = rgb.z / 255.f;
const float rl = sRGB2linear( r );
const float gl = sRGB2linear( g );
const float bl = sRGB2linear( b );
x = 0.4124f * rl + 0.3576f * gl + 0.1805f * bl;
y = 0.2126f * rl + 0.7152f * gl + 0.0722f * bl;
z = 0.0193f * rl + 0.1192f * gl + 0.9505f * bl;
}
static float revlab( float t )
{
const float p1 = 6.f/29.f;
const float p2 = 4.f/29.f;
if( t > p1 )
{
return t*t*t;
}
else
{
return 3 * sq( p1 ) * ( t - p2 );
}
}
XYZ::XYZ( const Lab& lab )
{
y = white.y * revlab( 1.f/116.f * ( lab.L + 16 ) );
x = white.x * revlab( 1.f/116.f * ( lab.L + 16 ) + 1.f/500.f * lab.a );
z = white.z * revlab( 1.f/116.f * ( lab.L + 16 ) - 1.f/200.f * lab.b );
}
v3i XYZ::RGB() const
{
const float rl = 3.2406f * x - 1.5372f * y - 0.4986f * z;
const float gl = -0.9689f * x + 1.8758f * y + 0.0415f * z;
const float bl = 0.0557f * x - 0.2040f * y + 1.0570f * z;
const float r = linear2sRGB( rl );
const float g = linear2sRGB( gl );
const float b = linear2sRGB( bl );
return v3i( clampu8( int32_t( r * 255 ) ), clampu8( int32_t( g * 255 ) ), clampu8( int32_t( b * 255 ) ) );
}
Lab::Lab()
: L( 0 )
, a( 0 )
, b( 0 )
{
}
Lab::Lab( float L, float a, float b )
: L( L )
, a( a )
, b( b )
{
}
static float labfunc( float t )
{
const float p1 = (6.f/29.f)*(6.f/29.f)*(6.f/29.f);
const float p2 = (1.f/3.f)*(29.f/6.f)*(29.f/6.f);
const float p3 = (4.f/29.f);
if( t > p1 )
{
return pow( t, 1.f/3.f );
}
else
{
return p2 * t + p3;
}
}
Lab::Lab( const XYZ& xyz )
{
L = 116 * labfunc( xyz.y * rwhite.y ) - 16;
a = 500 * ( labfunc( xyz.x * rwhite.x ) - labfunc( xyz.y * rwhite.y ) );
b = 200 * ( labfunc( xyz.y * rwhite.y ) - labfunc( xyz.z * rwhite.z ) );
}
Lab::Lab( const v3b& rgb )
{
new(this) Lab( XYZ( rgb ) );
}
}

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#ifndef __DARKRL__COLORSPACE_HPP__
#define __DARKRL__COLORSPACE_HPP__
#include "Vector.hpp"
namespace Color
{
class Lab;
class XYZ
{
public:
XYZ( float x, float y, float z );
XYZ( const v3b& rgb );
XYZ( const Lab& lab );
v3i RGB() const;
float x, y, z;
};
class Lab
{
public:
Lab();
Lab( float L, float a, float b );
Lab( const XYZ& xyz );
Lab( const v3b& rgb );
float L, a, b;
};
}
#endif

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#include <assert.h>
#include <utility>
#include "BitmapDownsampled.hpp"
#include "DataProvider.hpp"
#include "MipMap.hpp"
DataProvider::DataProvider( const char* fn, bool mipmap, bool bgr )
: m_offset( 0 )
, m_mipmap( mipmap )
, m_done( false )
, m_lines( 32 )
{
m_bmp.emplace_back( new Bitmap( fn, m_lines, bgr ) );
m_current = m_bmp[0].get();
}
DataProvider::~DataProvider()
{
}
unsigned int DataProvider::NumberOfParts() const
{
unsigned int parts = ( ( m_bmp[0]->Size().y / 4 ) + m_lines - 1 ) / m_lines;
if( m_mipmap )
{
v2i current = m_bmp[0]->Size();
int levels = NumberOfMipLevels( current );
unsigned int lines = m_lines;
for( int i=1; i<levels; i++ )
{
assert( current.x != 1 || current.y != 1 );
current.x = std::max( 1, current.x / 2 );
current.y = std::max( 1, current.y / 2 );
lines *= 2;
parts += ( ( std::max( 4, current.y ) / 4 ) + lines - 1 ) / lines;
}
assert( current.x == 1 && current.y == 1 );
}
return parts;
}
DataPart DataProvider::NextPart()
{
assert( !m_done );
unsigned int lines = m_lines;
bool done;
const auto ptr = m_current->NextBlock( lines, done );
DataPart ret = {
ptr,
std::max<unsigned int>( 4, m_current->Size().x ),
lines,
m_offset
};
m_offset += m_current->Size().x / 4 * lines;
if( done )
{
if( m_mipmap && ( m_current->Size().x != 1 || m_current->Size().y != 1 ) )
{
m_lines *= 2;
m_bmp.emplace_back( new BitmapDownsampled( *m_current, m_lines ) );
m_current = m_bmp[m_bmp.size()-1].get();
}
else
{
m_done = true;
}
}
return ret;
}

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#ifndef __DATAPROVIDER_HPP__
#define __DATAPROVIDER_HPP__
#include <memory>
#include <stdint.h>
#include <vector>
#include "Bitmap.hpp"
struct DataPart
{
const uint32_t* src;
unsigned int width;
unsigned int lines;
unsigned int offset;
};
class DataProvider
{
public:
DataProvider( const char* fn, bool mipmap, bool bgr );
~DataProvider();
unsigned int NumberOfParts() const;
DataPart NextPart();
bool Alpha() const { return m_bmp[0]->Alpha(); }
const v2i& Size() const { return m_bmp[0]->Size(); }
const Bitmap& ImageData() const { return *m_bmp[0]; }
private:
std::vector<std::unique_ptr<Bitmap>> m_bmp;
Bitmap* m_current;
unsigned int m_offset;
unsigned int m_lines;
bool m_mipmap;
bool m_done;
};
#endif

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#include <algorithm>
#include <vector>
#include "Debug.hpp"
static std::vector<DebugLog::Callback*> s_callbacks;
void DebugLog::Message( const char* msg )
{
for( auto it = s_callbacks.begin(); it != s_callbacks.end(); ++it )
{
(*it)->OnDebugMessage( msg );
}
}
void DebugLog::AddCallback( Callback* c )
{
const auto it = std::find( s_callbacks.begin(), s_callbacks.end(), c );
if( it == s_callbacks.end() )
{
s_callbacks.push_back( c );
}
}
void DebugLog::RemoveCallback( Callback* c )
{
const auto it = std::find( s_callbacks.begin(), s_callbacks.end(), c );
if( it != s_callbacks.end() )
{
s_callbacks.erase( it );
}
}

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#ifndef __DARKRL__DEBUG_HPP__
#define __DARKRL__DEBUG_HPP__
#ifdef DEBUG
# include <sstream>
# define DBGPRINT(msg) { std::stringstream __buf; __buf << msg; DebugLog::Message( __buf.str().c_str() ); }
#else
# define DBGPRINT(msg) ((void)0)
#endif
class DebugLog
{
public:
struct Callback
{
virtual void OnDebugMessage( const char* msg ) = 0;
};
static void Message( const char* msg );
static void AddCallback( Callback* c );
static void RemoveCallback( Callback* c );
private:
DebugLog() {}
};
#endif

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#include <algorithm>
#include <string.h>
#include "Dither.hpp"
#include "Math.hpp"
#ifdef __SSE4_1__
# ifdef _MSC_VER
# include <intrin.h>
# include <Windows.h>
# else
# include <x86intrin.h>
# endif
#endif
#ifdef __AVX2__
void DitherAvx2( uint8_t* data, __m128i px0, __m128i px1, __m128i px2, __m128i px3 )
{
static constexpr uint8_t a31[] = { 0, 0, 0, 1, 2, 0, 4, 0, 0, 2, 0, 0, 4, 0, 3, 0 };
static constexpr uint8_t a63[] = { 0, 0, 0, 0, 1, 0, 2, 0, 0, 1, 0, 0, 2, 0, 1, 0 };
static constexpr uint8_t s31[] = { 5, 0, 4, 0, 0, 2, 0, 1, 3, 0, 4, 0, 0, 0, 0, 2 };
static constexpr uint8_t s63[] = { 2, 0, 2, 0, 0, 1, 0, 0, 1, 0, 2, 0, 0, 0, 0, 1 };
const __m256i BayerAdd0 = _mm256_setr_epi8(
a31[0], a63[0], a31[0], 0, a31[1], a63[1], a31[1], 0, a31[2], a63[2], a31[2], 0, a31[3], a63[3], a31[3], 0,
a31[4], a63[4], a31[4], 0, a31[5], a63[5], a31[5], 0, a31[6], a63[6], a31[6], 0, a31[7], a63[7], a31[7], 0
);
const __m256i BayerAdd1 = _mm256_setr_epi8(
a31[8], a63[8], a31[8], 0, a31[9], a63[9], a31[9], 0, a31[10], a63[10], a31[10], 0, a31[11], a63[11], a31[11], 0,
a31[12], a63[12], a31[12], 0, a31[13], a63[13], a31[13], 0, a31[14], a63[14], a31[14], 0, a31[15], a63[15], a31[15], 0
);
const __m256i BayerSub0 = _mm256_setr_epi8(
s31[0], s63[0], s31[0], 0, s31[1], s63[1], s31[1], 0, s31[2], s63[2], s31[2], 0, s31[3], s63[3], s31[3], 0,
s31[4], s63[4], s31[4], 0, s31[5], s63[5], s31[5], 0, s31[6], s63[6], s31[6], 0, s31[7], s63[7], s31[7], 0
);
const __m256i BayerSub1 = _mm256_setr_epi8(
s31[8], s63[8], s31[8], 0, s31[9], s63[9], s31[9], 0, s31[10], s63[10], s31[10], 0, s31[11], s63[11], s31[11], 0,
s31[12], s63[12], s31[12], 0, s31[13], s63[13], s31[13], 0, s31[14], s63[14], s31[14], 0, s31[15], s63[15], s31[15], 0
);
__m256i l0 = _mm256_inserti128_si256( _mm256_castsi128_si256( px0 ), px1, 1 );
__m256i l1 = _mm256_inserti128_si256( _mm256_castsi128_si256( px2 ), px3, 1 );
__m256i a0 = _mm256_adds_epu8( l0, BayerAdd0 );
__m256i a1 = _mm256_adds_epu8( l1, BayerAdd1 );
__m256i s0 = _mm256_subs_epu8( a0, BayerSub0 );
__m256i s1 = _mm256_subs_epu8( a1, BayerSub1 );
_mm256_storeu_si256( (__m256i*)(data ), s0 );
_mm256_storeu_si256( (__m256i*)(data+32), s1 );
}
#endif
void Dither( uint8_t* data )
{
#ifdef __AVX2__
static constexpr uint8_t a31[] = { 0, 0, 0, 1, 2, 0, 4, 0, 0, 2, 0, 0, 4, 0, 3, 0 };
static constexpr uint8_t a63[] = { 0, 0, 0, 0, 1, 0, 2, 0, 0, 1, 0, 0, 2, 0, 1, 0 };
static constexpr uint8_t s31[] = { 5, 0, 4, 0, 0, 2, 0, 1, 3, 0, 4, 0, 0, 0, 0, 2 };
static constexpr uint8_t s63[] = { 2, 0, 2, 0, 0, 1, 0, 0, 1, 0, 2, 0, 0, 0, 0, 1 };
const __m256i BayerAdd0 = _mm256_setr_epi8(
a31[0], a63[0], a31[0], 0, a31[1], a63[1], a31[1], 0, a31[2], a63[2], a31[2], 0, a31[3], a63[3], a31[3], 0,
a31[4], a63[4], a31[4], 0, a31[5], a63[5], a31[5], 0, a31[6], a63[6], a31[6], 0, a31[7], a63[7], a31[7], 0
);
const __m256i BayerAdd1 = _mm256_setr_epi8(
a31[8], a63[8], a31[8], 0, a31[9], a63[9], a31[9], 0, a31[10], a63[10], a31[10], 0, a31[11], a63[11], a31[11], 0,
a31[12], a63[12], a31[12], 0, a31[13], a63[13], a31[13], 0, a31[14], a63[14], a31[14], 0, a31[15], a63[15], a31[15], 0
);
const __m256i BayerSub0 = _mm256_setr_epi8(
s31[0], s63[0], s31[0], 0, s31[1], s63[1], s31[1], 0, s31[2], s63[2], s31[2], 0, s31[3], s63[3], s31[3], 0,
s31[4], s63[4], s31[4], 0, s31[5], s63[5], s31[5], 0, s31[6], s63[6], s31[6], 0, s31[7], s63[7], s31[7], 0
);
const __m256i BayerSub1 = _mm256_setr_epi8(
s31[8], s63[8], s31[8], 0, s31[9], s63[9], s31[9], 0, s31[10], s63[10], s31[10], 0, s31[11], s63[11], s31[11], 0,
s31[12], s63[12], s31[12], 0, s31[13], s63[13], s31[13], 0, s31[14], s63[14], s31[14], 0, s31[15], s63[15], s31[15], 0
);
__m256i px0 = _mm256_loadu_si256( (__m256i*)(data ) );
__m256i px1 = _mm256_loadu_si256( (__m256i*)(data+32) );
__m256i a0 = _mm256_adds_epu8( px0, BayerAdd0 );
__m256i a1 = _mm256_adds_epu8( px1, BayerAdd1 );
__m256i s0 = _mm256_subs_epu8( a0, BayerSub0 );
__m256i s1 = _mm256_subs_epu8( a1, BayerSub1 );
_mm256_storeu_si256( (__m256i*)(data ), s0 );
_mm256_storeu_si256( (__m256i*)(data+32), s1 );
#else
static constexpr int8_t Bayer31[16] = {
( 0-8)*2/3, ( 8-8)*2/3, ( 2-8)*2/3, (10-8)*2/3,
(12-8)*2/3, ( 4-8)*2/3, (14-8)*2/3, ( 6-8)*2/3,
( 3-8)*2/3, (11-8)*2/3, ( 1-8)*2/3, ( 9-8)*2/3,
(15-8)*2/3, ( 7-8)*2/3, (13-8)*2/3, ( 5-8)*2/3
};
static constexpr int8_t Bayer63[16] = {
( 0-8)*2/6, ( 8-8)*2/6, ( 2-8)*2/6, (10-8)*2/6,
(12-8)*2/6, ( 4-8)*2/6, (14-8)*2/6, ( 6-8)*2/6,
( 3-8)*2/6, (11-8)*2/6, ( 1-8)*2/6, ( 9-8)*2/6,
(15-8)*2/6, ( 7-8)*2/6, (13-8)*2/6, ( 5-8)*2/6
};
for( int i=0; i<16; i++ )
{
uint32_t col;
memcpy( &col, data, 4 );
uint8_t r = col & 0xFF;
uint8_t g = ( col >> 8 ) & 0xFF;
uint8_t b = ( col >> 16 ) & 0xFF;
r = clampu8( r + Bayer31[i] );
g = clampu8( g + Bayer63[i] );
b = clampu8( b + Bayer31[i] );
col = r | ( g << 8 ) | ( b << 16 );
memcpy( data, &col, 4 );
data += 4;
}
#endif
}

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#ifndef __DITHER_HPP__
#define __DITHER_HPP__
#include <stddef.h>
#include <stdint.h>
#ifdef __AVX2__
# ifdef _MSC_VER
# include <intrin.h>
# else
# include <x86intrin.h>
# endif
#endif
void Dither( uint8_t* data );
#ifdef __AVX2__
void DitherAvx2( uint8_t* data, __m128i px0, __m128i px1, __m128i px2, __m128i px3 );
#endif
#endif

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#include <stdint.h>
#include "Error.hpp"
#include "Math.hpp"
float CalcMSE3( const Bitmap& bmp, const Bitmap& out )
{
float err = 0;
const uint32_t* p1 = bmp.Data();
const uint32_t* p2 = out.Data();
size_t cnt = bmp.Size().x * bmp.Size().y;
for( size_t i=0; i<cnt; i++ )
{
uint32_t c1 = *p1++;
uint32_t c2 = *p2++;
err += sq( ( c1 & 0x000000FF ) - ( c2 & 0x000000FF ) );
err += sq( ( ( c1 & 0x0000FF00 ) >> 8 ) - ( ( c2 & 0x0000FF00 ) >> 8 ) );
err += sq( ( ( c1 & 0x00FF0000 ) >> 16 ) - ( ( c2 & 0x00FF0000 ) >> 16 ) );
}
err /= cnt * 3;
return err;
}
float CalcMSE1( const Bitmap& bmp, const Bitmap& out )
{
float err = 0;
const uint32_t* p1 = bmp.Data();
const uint32_t* p2 = out.Data();
size_t cnt = bmp.Size().x * bmp.Size().y;
for( size_t i=0; i<cnt; i++ )
{
uint32_t c1 = *p1++;
uint32_t c2 = *p2++;
err += sq( ( c1 >> 24 ) - ( c2 & 0xFF ) );
}
err /= cnt;
return err;
}

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#ifndef __ERROR_HPP__
#define __ERROR_HPP__
#include "Bitmap.hpp"
float CalcMSE3( const Bitmap& bmp, const Bitmap& out );
float CalcMSE1( const Bitmap& bmp, const Bitmap& out );
#endif

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#ifndef __FORCEINLINE_HPP__
#define __FORCEINLINE_HPP__
#if defined(__GNUC__)
# define etcpak_force_inline __attribute__((always_inline)) inline
#elif defined(_MSC_VER)
# define etcpak_force_inline __forceinline
#else
# define etcpak_force_inline inline
#endif
#if defined(__GNUC__)
# define etcpak_no_inline __attribute__((noinline))
#elif defined(_MSC_VER)
# define etcpak_no_inline __declspec(noinline)
#else
# define etcpak_no_inline
#endif
#endif

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etcpak, an extremely fast ETC compression utility (https://github.com/wolfpld/etcpak)
Copyright (c) 2013-2021, Bartosz Taudul <wolf@nereid.pl>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the <organization> nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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#ifndef __DARKRL__MATH_HPP__
#define __DARKRL__MATH_HPP__
#include <algorithm>
#include <cmath>
#include <stdint.h>
#include "ForceInline.hpp"
template<typename T>
static etcpak_force_inline T AlignPOT( T val )
{
if( val == 0 ) return 1;
val--;
for( unsigned int i=1; i<sizeof( T ) * 8; i <<= 1 )
{
val |= val >> i;
}
return val + 1;
}
static etcpak_force_inline int CountSetBits( uint32_t val )
{
val -= ( val >> 1 ) & 0x55555555;
val = ( ( val >> 2 ) & 0x33333333 ) + ( val & 0x33333333 );
val = ( ( val >> 4 ) + val ) & 0x0f0f0f0f;
val += val >> 8;
val += val >> 16;
return val & 0x0000003f;
}
static etcpak_force_inline int CountLeadingZeros( uint32_t val )
{
val |= val >> 1;
val |= val >> 2;
val |= val >> 4;
val |= val >> 8;
val |= val >> 16;
return 32 - CountSetBits( val );
}
static etcpak_force_inline float sRGB2linear( float v )
{
const float a = 0.055f;
if( v <= 0.04045f )
{
return v / 12.92f;
}
else
{
return pow( ( v + a ) / ( 1 + a ), 2.4f );
}
}
static etcpak_force_inline float linear2sRGB( float v )
{
const float a = 0.055f;
if( v <= 0.0031308f )
{
return 12.92f * v;
}
else
{
return ( 1 + a ) * pow( v, 1/2.4f ) - a;
}
}
template<class T>
static etcpak_force_inline T SmoothStep( T x )
{
return x*x*(3-2*x);
}
static etcpak_force_inline uint8_t clampu8( int32_t val )
{
if( ( val & ~0xFF ) == 0 ) return val;
return ( ( ~val ) >> 31 ) & 0xFF;
}
template<class T>
static etcpak_force_inline T sq( T val )
{
return val * val;
}
static etcpak_force_inline int mul8bit( int a, int b )
{
int t = a*b + 128;
return ( t + ( t >> 8 ) ) >> 8;
}
#endif

11
thirdparty/etcpak/MipMap.hpp vendored Normal file
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#ifndef __MIPMAP_HPP__
#define __MIPMAP_HPP__
#include "Vector.hpp"
inline int NumberOfMipLevels( const v2i& size )
{
return (int)floor( log2( std::max( size.x, size.y ) ) ) + 1;
}
#endif

50
thirdparty/etcpak/ProcessCommon.hpp vendored Normal file
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#ifndef __PROCESSCOMMON_HPP__
#define __PROCESSCOMMON_HPP__
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
template<class T>
static size_t GetLeastError( const T* err, size_t num )
{
size_t idx = 0;
for( size_t i=1; i<num; i++ )
{
if( err[i] < err[idx] )
{
idx = i;
}
}
return idx;
}
static uint64_t FixByteOrder( uint64_t d )
{
return ( ( d & 0x00000000FFFFFFFF ) ) |
( ( d & 0xFF00000000000000 ) >> 24 ) |
( ( d & 0x000000FF00000000 ) << 24 ) |
( ( d & 0x00FF000000000000 ) >> 8 ) |
( ( d & 0x0000FF0000000000 ) << 8 );
}
template<class T, class S>
static uint64_t EncodeSelectors( uint64_t d, const T terr[2][8], const S tsel[16][8], const uint32_t* id )
{
size_t tidx[2];
tidx[0] = GetLeastError( terr[0], 8 );
tidx[1] = GetLeastError( terr[1], 8 );
d |= tidx[0] << 26;
d |= tidx[1] << 29;
for( int i=0; i<16; i++ )
{
uint64_t t = tsel[i][tidx[id[i]%2]];
d |= ( t & 0x1 ) << ( i + 32 );
d |= ( t & 0x2 ) << ( i + 47 );
}
return d;
}
#endif

956
thirdparty/etcpak/ProcessDxtc.cpp vendored Normal file
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#include "Dither.hpp"
#include "ForceInline.hpp"
#include "ProcessDxtc.hpp"
#include <assert.h>
#include <stdint.h>
#include <string.h>
#ifdef __ARM_NEON
# include <arm_neon.h>
#endif
#if defined __AVX__ && !defined __SSE4_1__
# define __SSE4_1__
#endif
#if defined __SSE4_1__ || defined __AVX2__
# ifdef _MSC_VER
# include <intrin.h>
# else
# include <x86intrin.h>
# ifndef _mm256_cvtsi256_si32
# define _mm256_cvtsi256_si32( v ) ( _mm_cvtsi128_si32( _mm256_castsi256_si128( v ) ) )
# endif
# endif
#endif
static etcpak_force_inline uint16_t to565( uint8_t r, uint8_t g, uint8_t b )
{
return ( ( r & 0xF8 ) << 8 ) | ( ( g & 0xFC ) << 3 ) | ( b >> 3 );
}
static etcpak_force_inline uint16_t to565( uint32_t c )
{
return
( ( c & 0xF80000 ) >> 19 ) |
( ( c & 0x00FC00 ) >> 5 ) |
( ( c & 0x0000F8 ) << 8 );
}
static const uint8_t DxtcIndexTable[256] = {
85, 87, 86, 84, 93, 95, 94, 92, 89, 91, 90, 88, 81, 83, 82, 80,
117, 119, 118, 116, 125, 127, 126, 124, 121, 123, 122, 120, 113, 115, 114, 112,
101, 103, 102, 100, 109, 111, 110, 108, 105, 107, 106, 104, 97, 99, 98, 96,
69, 71, 70, 68, 77, 79, 78, 76, 73, 75, 74, 72, 65, 67, 66, 64,
213, 215, 214, 212, 221, 223, 222, 220, 217, 219, 218, 216, 209, 211, 210, 208,
245, 247, 246, 244, 253, 255, 254, 252, 249, 251, 250, 248, 241, 243, 242, 240,
229, 231, 230, 228, 237, 239, 238, 236, 233, 235, 234, 232, 225, 227, 226, 224,
197, 199, 198, 196, 205, 207, 206, 204, 201, 203, 202, 200, 193, 195, 194, 192,
149, 151, 150, 148, 157, 159, 158, 156, 153, 155, 154, 152, 145, 147, 146, 144,
181, 183, 182, 180, 189, 191, 190, 188, 185, 187, 186, 184, 177, 179, 178, 176,
165, 167, 166, 164, 173, 175, 174, 172, 169, 171, 170, 168, 161, 163, 162, 160,
133, 135, 134, 132, 141, 143, 142, 140, 137, 139, 138, 136, 129, 131, 130, 128,
21, 23, 22, 20, 29, 31, 30, 28, 25, 27, 26, 24, 17, 19, 18, 16,
53, 55, 54, 52, 61, 63, 62, 60, 57, 59, 58, 56, 49, 51, 50, 48,
37, 39, 38, 36, 45, 47, 46, 44, 41, 43, 42, 40, 33, 35, 34, 32,
5, 7, 6, 4, 13, 15, 14, 12, 9, 11, 10, 8, 1, 3, 2, 0
};
static const uint8_t AlphaIndexTable_SSE[64] = {
9, 15, 14, 13, 12, 11, 10, 8, 57, 63, 62, 61, 60, 59, 58, 56,
49, 55, 54, 53, 52, 51, 50, 48, 41, 47, 46, 45, 44, 43, 42, 40,
33, 39, 38, 37, 36, 35, 34, 32, 25, 31, 30, 29, 28, 27, 26, 24,
17, 23, 22, 21, 20, 19, 18, 16, 1, 7, 6, 5, 4, 3, 2, 0,
};
static const uint16_t DivTable[255*3+1] = {
0xffff, 0xffff, 0xffff, 0xffff, 0xcccc, 0xaaaa, 0x9249, 0x8000, 0x71c7, 0x6666, 0x5d17, 0x5555, 0x4ec4, 0x4924, 0x4444, 0x4000,
0x3c3c, 0x38e3, 0x35e5, 0x3333, 0x30c3, 0x2e8b, 0x2c85, 0x2aaa, 0x28f5, 0x2762, 0x25ed, 0x2492, 0x234f, 0x2222, 0x2108, 0x2000,
0x1f07, 0x1e1e, 0x1d41, 0x1c71, 0x1bac, 0x1af2, 0x1a41, 0x1999, 0x18f9, 0x1861, 0x17d0, 0x1745, 0x16c1, 0x1642, 0x15c9, 0x1555,
0x14e5, 0x147a, 0x1414, 0x13b1, 0x1352, 0x12f6, 0x129e, 0x1249, 0x11f7, 0x11a7, 0x115b, 0x1111, 0x10c9, 0x1084, 0x1041, 0x1000,
0x0fc0, 0x0f83, 0x0f48, 0x0f0f, 0x0ed7, 0x0ea0, 0x0e6c, 0x0e38, 0x0e07, 0x0dd6, 0x0da7, 0x0d79, 0x0d4c, 0x0d20, 0x0cf6, 0x0ccc,
0x0ca4, 0x0c7c, 0x0c56, 0x0c30, 0x0c0c, 0x0be8, 0x0bc5, 0x0ba2, 0x0b81, 0x0b60, 0x0b40, 0x0b21, 0x0b02, 0x0ae4, 0x0ac7, 0x0aaa,
0x0a8e, 0x0a72, 0x0a57, 0x0a3d, 0x0a23, 0x0a0a, 0x09f1, 0x09d8, 0x09c0, 0x09a9, 0x0991, 0x097b, 0x0964, 0x094f, 0x0939, 0x0924,
0x090f, 0x08fb, 0x08e7, 0x08d3, 0x08c0, 0x08ad, 0x089a, 0x0888, 0x0876, 0x0864, 0x0853, 0x0842, 0x0831, 0x0820, 0x0810, 0x0800,
0x07f0, 0x07e0, 0x07d1, 0x07c1, 0x07b3, 0x07a4, 0x0795, 0x0787, 0x0779, 0x076b, 0x075d, 0x0750, 0x0743, 0x0736, 0x0729, 0x071c,
0x070f, 0x0703, 0x06f7, 0x06eb, 0x06df, 0x06d3, 0x06c8, 0x06bc, 0x06b1, 0x06a6, 0x069b, 0x0690, 0x0685, 0x067b, 0x0670, 0x0666,
0x065c, 0x0652, 0x0648, 0x063e, 0x0634, 0x062b, 0x0621, 0x0618, 0x060f, 0x0606, 0x05fd, 0x05f4, 0x05eb, 0x05e2, 0x05d9, 0x05d1,
0x05c9, 0x05c0, 0x05b8, 0x05b0, 0x05a8, 0x05a0, 0x0598, 0x0590, 0x0588, 0x0581, 0x0579, 0x0572, 0x056b, 0x0563, 0x055c, 0x0555,
0x054e, 0x0547, 0x0540, 0x0539, 0x0532, 0x052b, 0x0525, 0x051e, 0x0518, 0x0511, 0x050b, 0x0505, 0x04fe, 0x04f8, 0x04f2, 0x04ec,
0x04e6, 0x04e0, 0x04da, 0x04d4, 0x04ce, 0x04c8, 0x04c3, 0x04bd, 0x04b8, 0x04b2, 0x04ad, 0x04a7, 0x04a2, 0x049c, 0x0497, 0x0492,
0x048d, 0x0487, 0x0482, 0x047d, 0x0478, 0x0473, 0x046e, 0x0469, 0x0465, 0x0460, 0x045b, 0x0456, 0x0452, 0x044d, 0x0448, 0x0444,
0x043f, 0x043b, 0x0436, 0x0432, 0x042d, 0x0429, 0x0425, 0x0421, 0x041c, 0x0418, 0x0414, 0x0410, 0x040c, 0x0408, 0x0404, 0x0400,
0x03fc, 0x03f8, 0x03f4, 0x03f0, 0x03ec, 0x03e8, 0x03e4, 0x03e0, 0x03dd, 0x03d9, 0x03d5, 0x03d2, 0x03ce, 0x03ca, 0x03c7, 0x03c3,
0x03c0, 0x03bc, 0x03b9, 0x03b5, 0x03b2, 0x03ae, 0x03ab, 0x03a8, 0x03a4, 0x03a1, 0x039e, 0x039b, 0x0397, 0x0394, 0x0391, 0x038e,
0x038b, 0x0387, 0x0384, 0x0381, 0x037e, 0x037b, 0x0378, 0x0375, 0x0372, 0x036f, 0x036c, 0x0369, 0x0366, 0x0364, 0x0361, 0x035e,
0x035b, 0x0358, 0x0355, 0x0353, 0x0350, 0x034d, 0x034a, 0x0348, 0x0345, 0x0342, 0x0340, 0x033d, 0x033a, 0x0338, 0x0335, 0x0333,
0x0330, 0x032e, 0x032b, 0x0329, 0x0326, 0x0324, 0x0321, 0x031f, 0x031c, 0x031a, 0x0317, 0x0315, 0x0313, 0x0310, 0x030e, 0x030c,
0x0309, 0x0307, 0x0305, 0x0303, 0x0300, 0x02fe, 0x02fc, 0x02fa, 0x02f7, 0x02f5, 0x02f3, 0x02f1, 0x02ef, 0x02ec, 0x02ea, 0x02e8,
0x02e6, 0x02e4, 0x02e2, 0x02e0, 0x02de, 0x02dc, 0x02da, 0x02d8, 0x02d6, 0x02d4, 0x02d2, 0x02d0, 0x02ce, 0x02cc, 0x02ca, 0x02c8,
0x02c6, 0x02c4, 0x02c2, 0x02c0, 0x02be, 0x02bc, 0x02bb, 0x02b9, 0x02b7, 0x02b5, 0x02b3, 0x02b1, 0x02b0, 0x02ae, 0x02ac, 0x02aa,
0x02a8, 0x02a7, 0x02a5, 0x02a3, 0x02a1, 0x02a0, 0x029e, 0x029c, 0x029b, 0x0299, 0x0297, 0x0295, 0x0294, 0x0292, 0x0291, 0x028f,
0x028d, 0x028c, 0x028a, 0x0288, 0x0287, 0x0285, 0x0284, 0x0282, 0x0280, 0x027f, 0x027d, 0x027c, 0x027a, 0x0279, 0x0277, 0x0276,
0x0274, 0x0273, 0x0271, 0x0270, 0x026e, 0x026d, 0x026b, 0x026a, 0x0268, 0x0267, 0x0265, 0x0264, 0x0263, 0x0261, 0x0260, 0x025e,
0x025d, 0x025c, 0x025a, 0x0259, 0x0257, 0x0256, 0x0255, 0x0253, 0x0252, 0x0251, 0x024f, 0x024e, 0x024d, 0x024b, 0x024a, 0x0249,
0x0247, 0x0246, 0x0245, 0x0243, 0x0242, 0x0241, 0x0240, 0x023e, 0x023d, 0x023c, 0x023b, 0x0239, 0x0238, 0x0237, 0x0236, 0x0234,
0x0233, 0x0232, 0x0231, 0x0230, 0x022e, 0x022d, 0x022c, 0x022b, 0x022a, 0x0229, 0x0227, 0x0226, 0x0225, 0x0224, 0x0223, 0x0222,
0x0220, 0x021f, 0x021e, 0x021d, 0x021c, 0x021b, 0x021a, 0x0219, 0x0218, 0x0216, 0x0215, 0x0214, 0x0213, 0x0212, 0x0211, 0x0210,
0x020f, 0x020e, 0x020d, 0x020c, 0x020b, 0x020a, 0x0209, 0x0208, 0x0207, 0x0206, 0x0205, 0x0204, 0x0203, 0x0202, 0x0201, 0x0200,
0x01ff, 0x01fe, 0x01fd, 0x01fc, 0x01fb, 0x01fa, 0x01f9, 0x01f8, 0x01f7, 0x01f6, 0x01f5, 0x01f4, 0x01f3, 0x01f2, 0x01f1, 0x01f0,
0x01ef, 0x01ee, 0x01ed, 0x01ec, 0x01eb, 0x01ea, 0x01e9, 0x01e9, 0x01e8, 0x01e7, 0x01e6, 0x01e5, 0x01e4, 0x01e3, 0x01e2, 0x01e1,
0x01e0, 0x01e0, 0x01df, 0x01de, 0x01dd, 0x01dc, 0x01db, 0x01da, 0x01da, 0x01d9, 0x01d8, 0x01d7, 0x01d6, 0x01d5, 0x01d4, 0x01d4,
0x01d3, 0x01d2, 0x01d1, 0x01d0, 0x01cf, 0x01cf, 0x01ce, 0x01cd, 0x01cc, 0x01cb, 0x01cb, 0x01ca, 0x01c9, 0x01c8, 0x01c7, 0x01c7,
0x01c6, 0x01c5, 0x01c4, 0x01c3, 0x01c3, 0x01c2, 0x01c1, 0x01c0, 0x01c0, 0x01bf, 0x01be, 0x01bd, 0x01bd, 0x01bc, 0x01bb, 0x01ba,
0x01ba, 0x01b9, 0x01b8, 0x01b7, 0x01b7, 0x01b6, 0x01b5, 0x01b4, 0x01b4, 0x01b3, 0x01b2, 0x01b2, 0x01b1, 0x01b0, 0x01af, 0x01af,
0x01ae, 0x01ad, 0x01ad, 0x01ac, 0x01ab, 0x01aa, 0x01aa, 0x01a9, 0x01a8, 0x01a8, 0x01a7, 0x01a6, 0x01a6, 0x01a5, 0x01a4, 0x01a4,
0x01a3, 0x01a2, 0x01a2, 0x01a1, 0x01a0, 0x01a0, 0x019f, 0x019e, 0x019e, 0x019d, 0x019c, 0x019c, 0x019b, 0x019a, 0x019a, 0x0199,
0x0198, 0x0198, 0x0197, 0x0197, 0x0196, 0x0195, 0x0195, 0x0194, 0x0193, 0x0193, 0x0192, 0x0192, 0x0191, 0x0190, 0x0190, 0x018f,
0x018f, 0x018e, 0x018d, 0x018d, 0x018c, 0x018b, 0x018b, 0x018a, 0x018a, 0x0189, 0x0189, 0x0188, 0x0187, 0x0187, 0x0186, 0x0186,
0x0185, 0x0184, 0x0184, 0x0183, 0x0183, 0x0182, 0x0182, 0x0181, 0x0180, 0x0180, 0x017f, 0x017f, 0x017e, 0x017e, 0x017d, 0x017d,
0x017c, 0x017b, 0x017b, 0x017a, 0x017a, 0x0179, 0x0179, 0x0178, 0x0178, 0x0177, 0x0177, 0x0176, 0x0175, 0x0175, 0x0174, 0x0174,
0x0173, 0x0173, 0x0172, 0x0172, 0x0171, 0x0171, 0x0170, 0x0170, 0x016f, 0x016f, 0x016e, 0x016e, 0x016d, 0x016d, 0x016c, 0x016c,
0x016b, 0x016b, 0x016a, 0x016a, 0x0169, 0x0169, 0x0168, 0x0168, 0x0167, 0x0167, 0x0166, 0x0166, 0x0165, 0x0165, 0x0164, 0x0164,
0x0163, 0x0163, 0x0162, 0x0162, 0x0161, 0x0161, 0x0160, 0x0160, 0x015f, 0x015f, 0x015e, 0x015e, 0x015d, 0x015d, 0x015d, 0x015c,
0x015c, 0x015b, 0x015b, 0x015a, 0x015a, 0x0159, 0x0159, 0x0158, 0x0158, 0x0158, 0x0157, 0x0157, 0x0156, 0x0156
};
static const uint16_t DivTableNEON[255*3+1] = {
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x1c71, 0x1af2, 0x1999, 0x1861, 0x1745, 0x1642, 0x1555, 0x147a, 0x13b1, 0x12f6, 0x1249, 0x11a7, 0x1111, 0x1084, 0x1000,
0x0f83, 0x0f0f, 0x0ea0, 0x0e38, 0x0dd6, 0x0d79, 0x0d20, 0x0ccc, 0x0c7c, 0x0c30, 0x0be8, 0x0ba2, 0x0b60, 0x0b21, 0x0ae4, 0x0aaa,
0x0a72, 0x0a3d, 0x0a0a, 0x09d8, 0x09a9, 0x097b, 0x094f, 0x0924, 0x08fb, 0x08d3, 0x08ad, 0x0888, 0x0864, 0x0842, 0x0820, 0x0800,
0x07e0, 0x07c1, 0x07a4, 0x0787, 0x076b, 0x0750, 0x0736, 0x071c, 0x0703, 0x06eb, 0x06d3, 0x06bc, 0x06a6, 0x0690, 0x067b, 0x0666,
0x0652, 0x063e, 0x062b, 0x0618, 0x0606, 0x05f4, 0x05e2, 0x05d1, 0x05c0, 0x05b0, 0x05a0, 0x0590, 0x0581, 0x0572, 0x0563, 0x0555,
0x0547, 0x0539, 0x052b, 0x051e, 0x0511, 0x0505, 0x04f8, 0x04ec, 0x04e0, 0x04d4, 0x04c8, 0x04bd, 0x04b2, 0x04a7, 0x049c, 0x0492,
0x0487, 0x047d, 0x0473, 0x0469, 0x0460, 0x0456, 0x044d, 0x0444, 0x043b, 0x0432, 0x0429, 0x0421, 0x0418, 0x0410, 0x0408, 0x0400,
0x03f8, 0x03f0, 0x03e8, 0x03e0, 0x03d9, 0x03d2, 0x03ca, 0x03c3, 0x03bc, 0x03b5, 0x03ae, 0x03a8, 0x03a1, 0x039b, 0x0394, 0x038e,
0x0387, 0x0381, 0x037b, 0x0375, 0x036f, 0x0369, 0x0364, 0x035e, 0x0358, 0x0353, 0x034d, 0x0348, 0x0342, 0x033d, 0x0338, 0x0333,
0x032e, 0x0329, 0x0324, 0x031f, 0x031a, 0x0315, 0x0310, 0x030c, 0x0307, 0x0303, 0x02fe, 0x02fa, 0x02f5, 0x02f1, 0x02ec, 0x02e8,
0x02e4, 0x02e0, 0x02dc, 0x02d8, 0x02d4, 0x02d0, 0x02cc, 0x02c8, 0x02c4, 0x02c0, 0x02bc, 0x02b9, 0x02b5, 0x02b1, 0x02ae, 0x02aa,
0x02a7, 0x02a3, 0x02a0, 0x029c, 0x0299, 0x0295, 0x0292, 0x028f, 0x028c, 0x0288, 0x0285, 0x0282, 0x027f, 0x027c, 0x0279, 0x0276,
0x0273, 0x0270, 0x026d, 0x026a, 0x0267, 0x0264, 0x0261, 0x025e, 0x025c, 0x0259, 0x0256, 0x0253, 0x0251, 0x024e, 0x024b, 0x0249,
0x0246, 0x0243, 0x0241, 0x023e, 0x023c, 0x0239, 0x0237, 0x0234, 0x0232, 0x0230, 0x022d, 0x022b, 0x0229, 0x0226, 0x0224, 0x0222,
0x021f, 0x021d, 0x021b, 0x0219, 0x0216, 0x0214, 0x0212, 0x0210, 0x020e, 0x020c, 0x020a, 0x0208, 0x0206, 0x0204, 0x0202, 0x0200,
0x01fe, 0x01fc, 0x01fa, 0x01f8, 0x01f6, 0x01f4, 0x01f2, 0x01f0, 0x01ee, 0x01ec, 0x01ea, 0x01e9, 0x01e7, 0x01e5, 0x01e3, 0x01e1,
0x01e0, 0x01de, 0x01dc, 0x01da, 0x01d9, 0x01d7, 0x01d5, 0x01d4, 0x01d2, 0x01d0, 0x01cf, 0x01cd, 0x01cb, 0x01ca, 0x01c8, 0x01c7,
0x01c5, 0x01c3, 0x01c2, 0x01c0, 0x01bf, 0x01bd, 0x01bc, 0x01ba, 0x01b9, 0x01b7, 0x01b6, 0x01b4, 0x01b3, 0x01b2, 0x01b0, 0x01af,
0x01ad, 0x01ac, 0x01aa, 0x01a9, 0x01a8, 0x01a6, 0x01a5, 0x01a4, 0x01a2, 0x01a1, 0x01a0, 0x019e, 0x019d, 0x019c, 0x019a, 0x0199,
0x0198, 0x0197, 0x0195, 0x0194, 0x0193, 0x0192, 0x0190, 0x018f, 0x018e, 0x018d, 0x018b, 0x018a, 0x0189, 0x0188, 0x0187, 0x0186,
0x0184, 0x0183, 0x0182, 0x0181, 0x0180, 0x017f, 0x017e, 0x017d, 0x017b, 0x017a, 0x0179, 0x0178, 0x0177, 0x0176, 0x0175, 0x0174,
0x0173, 0x0172, 0x0171, 0x0170, 0x016f, 0x016e, 0x016d, 0x016c, 0x016b, 0x016a, 0x0169, 0x0168, 0x0167, 0x0166, 0x0165, 0x0164,
0x0163, 0x0162, 0x0161, 0x0160, 0x015f, 0x015e, 0x015d, 0x015c, 0x015b, 0x015a, 0x0159, 0x0158, 0x0158, 0x0157, 0x0156, 0x0155,
0x0154, 0x0153, 0x0152, 0x0151, 0x0150, 0x0150, 0x014f, 0x014e, 0x014d, 0x014c, 0x014b, 0x014a, 0x014a, 0x0149, 0x0148, 0x0147,
0x0146, 0x0146, 0x0145, 0x0144, 0x0143, 0x0142, 0x0142, 0x0141, 0x0140, 0x013f, 0x013e, 0x013e, 0x013d, 0x013c, 0x013b, 0x013b,
0x013a, 0x0139, 0x0138, 0x0138, 0x0137, 0x0136, 0x0135, 0x0135, 0x0134, 0x0133, 0x0132, 0x0132, 0x0131, 0x0130, 0x0130, 0x012f,
0x012e, 0x012e, 0x012d, 0x012c, 0x012b, 0x012b, 0x012a, 0x0129, 0x0129, 0x0128, 0x0127, 0x0127, 0x0126, 0x0125, 0x0125, 0x0124,
0x0123, 0x0123, 0x0122, 0x0121, 0x0121, 0x0120, 0x0120, 0x011f, 0x011e, 0x011e, 0x011d, 0x011c, 0x011c, 0x011b, 0x011b, 0x011a,
0x0119, 0x0119, 0x0118, 0x0118, 0x0117, 0x0116, 0x0116, 0x0115, 0x0115, 0x0114, 0x0113, 0x0113, 0x0112, 0x0112, 0x0111, 0x0111,
0x0110, 0x010f, 0x010f, 0x010e, 0x010e, 0x010d, 0x010d, 0x010c, 0x010c, 0x010b, 0x010a, 0x010a, 0x0109, 0x0109, 0x0108, 0x0108,
0x0107, 0x0107, 0x0106, 0x0106, 0x0105, 0x0105, 0x0104, 0x0104, 0x0103, 0x0103, 0x0102, 0x0102, 0x0101, 0x0101, 0x0100, 0x0100,
0x00ff, 0x00ff, 0x00fe, 0x00fe, 0x00fd, 0x00fd, 0x00fc, 0x00fc, 0x00fb, 0x00fb, 0x00fa, 0x00fa, 0x00f9, 0x00f9, 0x00f8, 0x00f8,
0x00f7, 0x00f7, 0x00f6, 0x00f6, 0x00f5, 0x00f5, 0x00f4, 0x00f4, 0x00f4, 0x00f3, 0x00f3, 0x00f2, 0x00f2, 0x00f1, 0x00f1, 0x00f0,
0x00f0, 0x00f0, 0x00ef, 0x00ef, 0x00ee, 0x00ee, 0x00ed, 0x00ed, 0x00ed, 0x00ec, 0x00ec, 0x00eb, 0x00eb, 0x00ea, 0x00ea, 0x00ea,
0x00e9, 0x00e9, 0x00e8, 0x00e8, 0x00e7, 0x00e7, 0x00e7, 0x00e6, 0x00e6, 0x00e5, 0x00e5, 0x00e5, 0x00e4, 0x00e4, 0x00e3, 0x00e3,
0x00e3, 0x00e2, 0x00e2, 0x00e1, 0x00e1, 0x00e1, 0x00e0, 0x00e0, 0x00e0, 0x00df, 0x00df, 0x00de, 0x00de, 0x00de, 0x00dd, 0x00dd,
0x00dd, 0x00dc, 0x00dc, 0x00db, 0x00db, 0x00db, 0x00da, 0x00da, 0x00da, 0x00d9, 0x00d9, 0x00d9, 0x00d8, 0x00d8, 0x00d7, 0x00d7,
0x00d7, 0x00d6, 0x00d6, 0x00d6, 0x00d5, 0x00d5, 0x00d5, 0x00d4, 0x00d4, 0x00d4, 0x00d3, 0x00d3, 0x00d3, 0x00d2, 0x00d2, 0x00d2,
0x00d1, 0x00d1, 0x00d1, 0x00d0, 0x00d0, 0x00d0, 0x00cf, 0x00cf, 0x00cf, 0x00ce, 0x00ce, 0x00ce, 0x00cd, 0x00cd, 0x00cd, 0x00cc,
0x00cc, 0x00cc, 0x00cb, 0x00cb, 0x00cb, 0x00ca, 0x00ca, 0x00ca, 0x00c9, 0x00c9, 0x00c9, 0x00c9, 0x00c8, 0x00c8, 0x00c8, 0x00c7,
0x00c7, 0x00c7, 0x00c6, 0x00c6, 0x00c6, 0x00c5, 0x00c5, 0x00c5, 0x00c5, 0x00c4, 0x00c4, 0x00c4, 0x00c3, 0x00c3, 0x00c3, 0x00c3,
0x00c2, 0x00c2, 0x00c2, 0x00c1, 0x00c1, 0x00c1, 0x00c1, 0x00c0, 0x00c0, 0x00c0, 0x00bf, 0x00bf, 0x00bf, 0x00bf, 0x00be, 0x00be,
0x00be, 0x00bd, 0x00bd, 0x00bd, 0x00bd, 0x00bc, 0x00bc, 0x00bc, 0x00bc, 0x00bb, 0x00bb, 0x00bb, 0x00ba, 0x00ba, 0x00ba, 0x00ba,
0x00b9, 0x00b9, 0x00b9, 0x00b9, 0x00b8, 0x00b8, 0x00b8, 0x00b8, 0x00b7, 0x00b7, 0x00b7, 0x00b7, 0x00b6, 0x00b6, 0x00b6, 0x00b6,
0x00b5, 0x00b5, 0x00b5, 0x00b5, 0x00b4, 0x00b4, 0x00b4, 0x00b4, 0x00b3, 0x00b3, 0x00b3, 0x00b3, 0x00b2, 0x00b2, 0x00b2, 0x00b2,
0x00b1, 0x00b1, 0x00b1, 0x00b1, 0x00b0, 0x00b0, 0x00b0, 0x00b0, 0x00af, 0x00af, 0x00af, 0x00af, 0x00ae, 0x00ae, 0x00ae, 0x00ae,
0x00ae, 0x00ad, 0x00ad, 0x00ad, 0x00ad, 0x00ac, 0x00ac, 0x00ac, 0x00ac, 0x00ac, 0x00ab, 0x00ab, 0x00ab, 0x00ab,
};
static const uint16_t DivTableAlpha[256] = {
0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xe38e, 0xcccc, 0xba2e, 0xaaaa, 0x9d89, 0x9249, 0x8888, 0x8000,
0x7878, 0x71c7, 0x6bca, 0x6666, 0x6186, 0x5d17, 0x590b, 0x5555, 0x51eb, 0x4ec4, 0x4bda, 0x4924, 0x469e, 0x4444, 0x4210, 0x4000,
0x3e0f, 0x3c3c, 0x3a83, 0x38e3, 0x3759, 0x35e5, 0x3483, 0x3333, 0x31f3, 0x30c3, 0x2fa0, 0x2e8b, 0x2d82, 0x2c85, 0x2b93, 0x2aaa,
0x29cb, 0x28f5, 0x2828, 0x2762, 0x26a4, 0x25ed, 0x253c, 0x2492, 0x23ee, 0x234f, 0x22b6, 0x2222, 0x2192, 0x2108, 0x2082, 0x2000,
0x1f81, 0x1f07, 0x1e91, 0x1e1e, 0x1dae, 0x1d41, 0x1cd8, 0x1c71, 0x1c0e, 0x1bac, 0x1b4e, 0x1af2, 0x1a98, 0x1a41, 0x19ec, 0x1999,
0x1948, 0x18f9, 0x18ac, 0x1861, 0x1818, 0x17d0, 0x178a, 0x1745, 0x1702, 0x16c1, 0x1681, 0x1642, 0x1605, 0x15c9, 0x158e, 0x1555,
0x151d, 0x14e5, 0x14af, 0x147a, 0x1446, 0x1414, 0x13e2, 0x13b1, 0x1381, 0x1352, 0x1323, 0x12f6, 0x12c9, 0x129e, 0x1273, 0x1249,
0x121f, 0x11f7, 0x11cf, 0x11a7, 0x1181, 0x115b, 0x1135, 0x1111, 0x10ec, 0x10c9, 0x10a6, 0x1084, 0x1062, 0x1041, 0x1020, 0x1000,
0x0fe0, 0x0fc0, 0x0fa2, 0x0f83, 0x0f66, 0x0f48, 0x0f2b, 0x0f0f, 0x0ef2, 0x0ed7, 0x0ebb, 0x0ea0, 0x0e86, 0x0e6c, 0x0e52, 0x0e38,
0x0e1f, 0x0e07, 0x0dee, 0x0dd6, 0x0dbe, 0x0da7, 0x0d90, 0x0d79, 0x0d62, 0x0d4c, 0x0d36, 0x0d20, 0x0d0b, 0x0cf6, 0x0ce1, 0x0ccc,
0x0cb8, 0x0ca4, 0x0c90, 0x0c7c, 0x0c69, 0x0c56, 0x0c43, 0x0c30, 0x0c1e, 0x0c0c, 0x0bfa, 0x0be8, 0x0bd6, 0x0bc5, 0x0bb3, 0x0ba2,
0x0b92, 0x0b81, 0x0b70, 0x0b60, 0x0b50, 0x0b40, 0x0b30, 0x0b21, 0x0b11, 0x0b02, 0x0af3, 0x0ae4, 0x0ad6, 0x0ac7, 0x0ab8, 0x0aaa,
0x0a9c, 0x0a8e, 0x0a80, 0x0a72, 0x0a65, 0x0a57, 0x0a4a, 0x0a3d, 0x0a30, 0x0a23, 0x0a16, 0x0a0a, 0x09fd, 0x09f1, 0x09e4, 0x09d8,
0x09cc, 0x09c0, 0x09b4, 0x09a9, 0x099d, 0x0991, 0x0986, 0x097b, 0x0970, 0x0964, 0x095a, 0x094f, 0x0944, 0x0939, 0x092f, 0x0924,
0x091a, 0x090f, 0x0905, 0x08fb, 0x08f1, 0x08e7, 0x08dd, 0x08d3, 0x08ca, 0x08c0, 0x08b7, 0x08ad, 0x08a4, 0x089a, 0x0891, 0x0888,
0x087f, 0x0876, 0x086d, 0x0864, 0x085b, 0x0853, 0x084a, 0x0842, 0x0839, 0x0831, 0x0828, 0x0820, 0x0818, 0x0810, 0x0808, 0x0800,
};
static etcpak_force_inline uint64_t ProcessRGB( const uint8_t* src )
{
#ifdef __SSE4_1__
__m128i px0 = _mm_loadu_si128(((__m128i*)src) + 0);
__m128i px1 = _mm_loadu_si128(((__m128i*)src) + 1);
__m128i px2 = _mm_loadu_si128(((__m128i*)src) + 2);
__m128i px3 = _mm_loadu_si128(((__m128i*)src) + 3);
__m128i smask = _mm_set1_epi32( 0xF8FCF8 );
__m128i sd0 = _mm_and_si128( px0, smask );
__m128i sd1 = _mm_and_si128( px1, smask );
__m128i sd2 = _mm_and_si128( px2, smask );
__m128i sd3 = _mm_and_si128( px3, smask );
__m128i sc = _mm_shuffle_epi32(sd0, _MM_SHUFFLE(0, 0, 0, 0));
__m128i sc0 = _mm_cmpeq_epi8(sd0, sc);
__m128i sc1 = _mm_cmpeq_epi8(sd1, sc);
__m128i sc2 = _mm_cmpeq_epi8(sd2, sc);
__m128i sc3 = _mm_cmpeq_epi8(sd3, sc);
__m128i sm0 = _mm_and_si128(sc0, sc1);
__m128i sm1 = _mm_and_si128(sc2, sc3);
__m128i sm = _mm_and_si128(sm0, sm1);
if( _mm_testc_si128(sm, _mm_set1_epi32(-1)) )
{
uint32_t c;
memcpy( &c, src, 4 );
return uint64_t( to565( c ) ) << 16;
}
__m128i min0 = _mm_min_epu8( px0, px1 );
__m128i min1 = _mm_min_epu8( px2, px3 );
__m128i min2 = _mm_min_epu8( min0, min1 );
__m128i max0 = _mm_max_epu8( px0, px1 );
__m128i max1 = _mm_max_epu8( px2, px3 );
__m128i max2 = _mm_max_epu8( max0, max1 );
__m128i min3 = _mm_shuffle_epi32( min2, _MM_SHUFFLE( 2, 3, 0, 1 ) );
__m128i max3 = _mm_shuffle_epi32( max2, _MM_SHUFFLE( 2, 3, 0, 1 ) );
__m128i min4 = _mm_min_epu8( min2, min3 );
__m128i max4 = _mm_max_epu8( max2, max3 );
__m128i min5 = _mm_shuffle_epi32( min4, _MM_SHUFFLE( 0, 0, 2, 2 ) );
__m128i max5 = _mm_shuffle_epi32( max4, _MM_SHUFFLE( 0, 0, 2, 2 ) );
__m128i rmin = _mm_min_epu8( min4, min5 );
__m128i rmax = _mm_max_epu8( max4, max5 );
__m128i range1 = _mm_subs_epu8( rmax, rmin );
__m128i range2 = _mm_sad_epu8( rmax, rmin );
uint32_t vrange = _mm_cvtsi128_si32( range2 ) >> 1;
__m128i range = _mm_set1_epi16( DivTable[vrange] );
__m128i inset1 = _mm_srli_epi16( range1, 4 );
__m128i inset = _mm_and_si128( inset1, _mm_set1_epi8( 0xF ) );
__m128i min = _mm_adds_epu8( rmin, inset );
__m128i max = _mm_subs_epu8( rmax, inset );
__m128i c0 = _mm_subs_epu8( px0, rmin );
__m128i c1 = _mm_subs_epu8( px1, rmin );
__m128i c2 = _mm_subs_epu8( px2, rmin );
__m128i c3 = _mm_subs_epu8( px3, rmin );
__m128i is0 = _mm_maddubs_epi16( c0, _mm_set1_epi8( 1 ) );
__m128i is1 = _mm_maddubs_epi16( c1, _mm_set1_epi8( 1 ) );
__m128i is2 = _mm_maddubs_epi16( c2, _mm_set1_epi8( 1 ) );
__m128i is3 = _mm_maddubs_epi16( c3, _mm_set1_epi8( 1 ) );
__m128i s0 = _mm_hadd_epi16( is0, is1 );
__m128i s1 = _mm_hadd_epi16( is2, is3 );
__m128i m0 = _mm_mulhi_epu16( s0, range );
__m128i m1 = _mm_mulhi_epu16( s1, range );
__m128i p0 = _mm_packus_epi16( m0, m1 );
__m128i p1 = _mm_or_si128( _mm_srai_epi32( p0, 6 ), _mm_srai_epi32( p0, 12 ) );
__m128i p2 = _mm_or_si128( _mm_srai_epi32( p0, 18 ), p0 );
__m128i p3 = _mm_or_si128( p1, p2 );
__m128i p =_mm_shuffle_epi8( p3, _mm_set1_epi32( 0x0C080400 ) );
uint32_t vmin = _mm_cvtsi128_si32( min );
uint32_t vmax = _mm_cvtsi128_si32( max );
uint32_t vp = _mm_cvtsi128_si32( p );
return uint64_t( ( uint64_t( to565( vmin ) ) << 16 ) | to565( vmax ) | ( uint64_t( vp ) << 32 ) );
#elif defined __ARM_NEON
# ifdef __aarch64__
uint8x16x4_t px = vld4q_u8( src );
uint8x16_t lr = px.val[0];
uint8x16_t lg = px.val[1];
uint8x16_t lb = px.val[2];
uint8_t rmaxr = vmaxvq_u8( lr );
uint8_t rmaxg = vmaxvq_u8( lg );
uint8_t rmaxb = vmaxvq_u8( lb );
uint8_t rminr = vminvq_u8( lr );
uint8_t rming = vminvq_u8( lg );
uint8_t rminb = vminvq_u8( lb );
int rr = rmaxr - rminr;
int rg = rmaxg - rming;
int rb = rmaxb - rminb;
int vrange1 = rr + rg + rb;
uint16_t vrange2 = DivTableNEON[vrange1];
uint8_t insetr = rr >> 4;
uint8_t insetg = rg >> 4;
uint8_t insetb = rb >> 4;
uint8_t minr = rminr + insetr;
uint8_t ming = rming + insetg;
uint8_t minb = rminb + insetb;
uint8_t maxr = rmaxr - insetr;
uint8_t maxg = rmaxg - insetg;
uint8_t maxb = rmaxb - insetb;
uint8x16_t cr = vsubq_u8( lr, vdupq_n_u8( rminr ) );
uint8x16_t cg = vsubq_u8( lg, vdupq_n_u8( rming ) );
uint8x16_t cb = vsubq_u8( lb, vdupq_n_u8( rminb ) );
uint16x8_t is0l = vaddl_u8( vget_low_u8( cr ), vget_low_u8( cg ) );
uint16x8_t is0h = vaddl_u8( vget_high_u8( cr ), vget_high_u8( cg ) );
uint16x8_t is1l = vaddw_u8( is0l, vget_low_u8( cb ) );
uint16x8_t is1h = vaddw_u8( is0h, vget_high_u8( cb ) );
int16x8_t range = vdupq_n_s16( vrange2 );
uint16x8_t m0 = vreinterpretq_u16_s16( vqdmulhq_s16( vreinterpretq_s16_u16( is1l ), range ) );
uint16x8_t m1 = vreinterpretq_u16_s16( vqdmulhq_s16( vreinterpretq_s16_u16( is1h ), range ) );
uint8x8_t p00 = vmovn_u16( m0 );
uint8x8_t p01 = vmovn_u16( m1 );
uint8x16_t p0 = vcombine_u8( p00, p01 );
uint32x4_t p1 = vaddq_u32( vshrq_n_u32( vreinterpretq_u32_u8( p0 ), 6 ), vshrq_n_u32( vreinterpretq_u32_u8( p0 ), 12 ) );
uint32x4_t p2 = vaddq_u32( vshrq_n_u32( vreinterpretq_u32_u8( p0 ), 18 ), vreinterpretq_u32_u8( p0 ) );
uint32x4_t p3 = vaddq_u32( p1, p2 );
uint16x4x2_t p4 = vuzp_u16( vget_low_u16( vreinterpretq_u16_u32( p3 ) ), vget_high_u16( vreinterpretq_u16_u32( p3 ) ) );
uint8x8x2_t p = vuzp_u8( vreinterpret_u8_u16( p4.val[0] ), vreinterpret_u8_u16( p4.val[0] ) );
uint32_t vp;
vst1_lane_u32( &vp, vreinterpret_u32_u8( p.val[0] ), 0 );
return uint64_t( ( uint64_t( to565( minr, ming, minb ) ) << 16 ) | to565( maxr, maxg, maxb ) | ( uint64_t( vp ) << 32 ) );
# else
uint32x4_t px0 = vld1q_u32( (uint32_t*)src );
uint32x4_t px1 = vld1q_u32( (uint32_t*)src + 4 );
uint32x4_t px2 = vld1q_u32( (uint32_t*)src + 8 );
uint32x4_t px3 = vld1q_u32( (uint32_t*)src + 12 );
uint32x4_t smask = vdupq_n_u32( 0xF8FCF8 );
uint32x4_t sd0 = vandq_u32( smask, px0 );
uint32x4_t sd1 = vandq_u32( smask, px1 );
uint32x4_t sd2 = vandq_u32( smask, px2 );
uint32x4_t sd3 = vandq_u32( smask, px3 );
uint32x4_t sc = vdupq_n_u32( sd0[0] );
uint32x4_t sc0 = vceqq_u32( sd0, sc );
uint32x4_t sc1 = vceqq_u32( sd1, sc );
uint32x4_t sc2 = vceqq_u32( sd2, sc );
uint32x4_t sc3 = vceqq_u32( sd3, sc );
uint32x4_t sm0 = vandq_u32( sc0, sc1 );
uint32x4_t sm1 = vandq_u32( sc2, sc3 );
int64x2_t sm = vreinterpretq_s64_u32( vandq_u32( sm0, sm1 ) );
if( sm[0] == -1 && sm[1] == -1 )
{
return uint64_t( to565( src[0], src[1], src[2] ) ) << 16;
}
uint32x4_t mask = vdupq_n_u32( 0xFFFFFF );
uint8x16_t l0 = vreinterpretq_u8_u32( vandq_u32( mask, px0 ) );
uint8x16_t l1 = vreinterpretq_u8_u32( vandq_u32( mask, px1 ) );
uint8x16_t l2 = vreinterpretq_u8_u32( vandq_u32( mask, px2 ) );
uint8x16_t l3 = vreinterpretq_u8_u32( vandq_u32( mask, px3 ) );
uint8x16_t min0 = vminq_u8( l0, l1 );
uint8x16_t min1 = vminq_u8( l2, l3 );
uint8x16_t min2 = vminq_u8( min0, min1 );
uint8x16_t max0 = vmaxq_u8( l0, l1 );
uint8x16_t max1 = vmaxq_u8( l2, l3 );
uint8x16_t max2 = vmaxq_u8( max0, max1 );
uint8x16_t min3 = vreinterpretq_u8_u32( vrev64q_u32( vreinterpretq_u32_u8( min2 ) ) );
uint8x16_t max3 = vreinterpretq_u8_u32( vrev64q_u32( vreinterpretq_u32_u8( max2 ) ) );
uint8x16_t min4 = vminq_u8( min2, min3 );
uint8x16_t max4 = vmaxq_u8( max2, max3 );
uint8x16_t min5 = vcombine_u8( vget_high_u8( min4 ), vget_low_u8( min4 ) );
uint8x16_t max5 = vcombine_u8( vget_high_u8( max4 ), vget_low_u8( max4 ) );
uint8x16_t rmin = vminq_u8( min4, min5 );
uint8x16_t rmax = vmaxq_u8( max4, max5 );
uint8x16_t range1 = vsubq_u8( rmax, rmin );
uint8x8_t range2 = vget_low_u8( range1 );
uint8x8x2_t range3 = vzip_u8( range2, vdup_n_u8( 0 ) );
uint16x4_t range4 = vreinterpret_u16_u8( range3.val[0] );
uint16_t vrange1;
uint16x4_t range5 = vpadd_u16( range4, range4 );
uint16x4_t range6 = vpadd_u16( range5, range5 );
vst1_lane_u16( &vrange1, range6, 0 );
uint32_t vrange2 = ( 2 << 16 ) / uint32_t( vrange1 + 1 );
uint16x8_t range = vdupq_n_u16( vrange2 );
uint8x16_t inset = vshrq_n_u8( range1, 4 );
uint8x16_t min = vaddq_u8( rmin, inset );
uint8x16_t max = vsubq_u8( rmax, inset );
uint8x16_t c0 = vsubq_u8( l0, rmin );
uint8x16_t c1 = vsubq_u8( l1, rmin );
uint8x16_t c2 = vsubq_u8( l2, rmin );
uint8x16_t c3 = vsubq_u8( l3, rmin );
uint16x8_t is0 = vpaddlq_u8( c0 );
uint16x8_t is1 = vpaddlq_u8( c1 );
uint16x8_t is2 = vpaddlq_u8( c2 );
uint16x8_t is3 = vpaddlq_u8( c3 );
uint16x4_t is4 = vpadd_u16( vget_low_u16( is0 ), vget_high_u16( is0 ) );
uint16x4_t is5 = vpadd_u16( vget_low_u16( is1 ), vget_high_u16( is1 ) );
uint16x4_t is6 = vpadd_u16( vget_low_u16( is2 ), vget_high_u16( is2 ) );
uint16x4_t is7 = vpadd_u16( vget_low_u16( is3 ), vget_high_u16( is3 ) );
uint16x8_t s0 = vcombine_u16( is4, is5 );
uint16x8_t s1 = vcombine_u16( is6, is7 );
uint16x8_t m0 = vreinterpretq_u16_s16( vqdmulhq_s16( vreinterpretq_s16_u16( s0 ), vreinterpretq_s16_u16( range ) ) );
uint16x8_t m1 = vreinterpretq_u16_s16( vqdmulhq_s16( vreinterpretq_s16_u16( s1 ), vreinterpretq_s16_u16( range ) ) );
uint8x8_t p00 = vmovn_u16( m0 );
uint8x8_t p01 = vmovn_u16( m1 );
uint8x16_t p0 = vcombine_u8( p00, p01 );
uint32x4_t p1 = vaddq_u32( vshrq_n_u32( vreinterpretq_u32_u8( p0 ), 6 ), vshrq_n_u32( vreinterpretq_u32_u8( p0 ), 12 ) );
uint32x4_t p2 = vaddq_u32( vshrq_n_u32( vreinterpretq_u32_u8( p0 ), 18 ), vreinterpretq_u32_u8( p0 ) );
uint32x4_t p3 = vaddq_u32( p1, p2 );
uint16x4x2_t p4 = vuzp_u16( vget_low_u16( vreinterpretq_u16_u32( p3 ) ), vget_high_u16( vreinterpretq_u16_u32( p3 ) ) );
uint8x8x2_t p = vuzp_u8( vreinterpret_u8_u16( p4.val[0] ), vreinterpret_u8_u16( p4.val[0] ) );
uint32_t vmin, vmax, vp;
vst1q_lane_u32( &vmin, vreinterpretq_u32_u8( min ), 0 );
vst1q_lane_u32( &vmax, vreinterpretq_u32_u8( max ), 0 );
vst1_lane_u32( &vp, vreinterpret_u32_u8( p.val[0] ), 0 );
return uint64_t( ( uint64_t( to565( vmin ) ) << 16 ) | to565( vmax ) | ( uint64_t( vp ) << 32 ) );
# endif
#else
uint32_t ref;
memcpy( &ref, src, 4 );
uint32_t refMask = ref & 0xF8FCF8;
auto stmp = src + 4;
for( int i=1; i<16; i++ )
{
uint32_t px;
memcpy( &px, stmp, 4 );
if( ( px & 0xF8FCF8 ) != refMask ) break;
stmp += 4;
}
if( stmp == src + 64 )
{
return uint64_t( to565( ref ) ) << 16;
}
uint8_t min[3] = { src[0], src[1], src[2] };
uint8_t max[3] = { src[0], src[1], src[2] };
auto tmp = src + 4;
for( int i=1; i<16; i++ )
{
for( int j=0; j<3; j++ )
{
if( tmp[j] < min[j] ) min[j] = tmp[j];
else if( tmp[j] > max[j] ) max[j] = tmp[j];
}
tmp += 4;
}
const uint32_t range = DivTable[max[0] - min[0] + max[1] - min[1] + max[2] - min[2]];
const uint32_t rmin = min[0] + min[1] + min[2];
for( int i=0; i<3; i++ )
{
const uint8_t inset = ( max[i] - min[i] ) >> 4;
min[i] += inset;
max[i] -= inset;
}
uint32_t data = 0;
for( int i=0; i<16; i++ )
{
const uint32_t c = src[0] + src[1] + src[2] - rmin;
const uint8_t idx = ( c * range ) >> 16;
data |= idx << (i*2);
src += 4;
}
return uint64_t( ( uint64_t( to565( min[0], min[1], min[2] ) ) << 16 ) | to565( max[0], max[1], max[2] ) | ( uint64_t( data ) << 32 ) );
#endif
}
#ifdef __AVX2__
static etcpak_force_inline void ProcessRGB_AVX( const uint8_t* src, char*& dst )
{
__m256i px0 = _mm256_loadu_si256(((__m256i*)src) + 0);
__m256i px1 = _mm256_loadu_si256(((__m256i*)src) + 1);
__m256i px2 = _mm256_loadu_si256(((__m256i*)src) + 2);
__m256i px3 = _mm256_loadu_si256(((__m256i*)src) + 3);
__m256i smask = _mm256_set1_epi32( 0xF8FCF8 );
__m256i sd0 = _mm256_and_si256( px0, smask );
__m256i sd1 = _mm256_and_si256( px1, smask );
__m256i sd2 = _mm256_and_si256( px2, smask );
__m256i sd3 = _mm256_and_si256( px3, smask );
__m256i sc = _mm256_shuffle_epi32(sd0, _MM_SHUFFLE(0, 0, 0, 0));
__m256i sc0 = _mm256_cmpeq_epi8(sd0, sc);
__m256i sc1 = _mm256_cmpeq_epi8(sd1, sc);
__m256i sc2 = _mm256_cmpeq_epi8(sd2, sc);
__m256i sc3 = _mm256_cmpeq_epi8(sd3, sc);
__m256i sm0 = _mm256_and_si256(sc0, sc1);
__m256i sm1 = _mm256_and_si256(sc2, sc3);
__m256i sm = _mm256_and_si256(sm0, sm1);
const int64_t solid0 = 1 - _mm_testc_si128( _mm256_castsi256_si128( sm ), _mm_set1_epi32( -1 ) );
const int64_t solid1 = 1 - _mm_testc_si128( _mm256_extracti128_si256( sm, 1 ), _mm_set1_epi32( -1 ) );
if( solid0 + solid1 == 0 )
{
const auto c0 = uint64_t( to565( src[0], src[1], src[2] ) );
const auto c1 = uint64_t( to565( src[16], src[17], src[18] ) );
memcpy( dst, &c0, 8 );
memcpy( dst+8, &c1, 8 );
dst += 16;
return;
}
__m256i min0 = _mm256_min_epu8( px0, px1 );
__m256i min1 = _mm256_min_epu8( px2, px3 );
__m256i min2 = _mm256_min_epu8( min0, min1 );
__m256i max0 = _mm256_max_epu8( px0, px1 );
__m256i max1 = _mm256_max_epu8( px2, px3 );
__m256i max2 = _mm256_max_epu8( max0, max1 );
__m256i min3 = _mm256_shuffle_epi32( min2, _MM_SHUFFLE( 2, 3, 0, 1 ) );
__m256i max3 = _mm256_shuffle_epi32( max2, _MM_SHUFFLE( 2, 3, 0, 1 ) );
__m256i min4 = _mm256_min_epu8( min2, min3 );
__m256i max4 = _mm256_max_epu8( max2, max3 );
__m256i min5 = _mm256_shuffle_epi32( min4, _MM_SHUFFLE( 0, 0, 2, 2 ) );
__m256i max5 = _mm256_shuffle_epi32( max4, _MM_SHUFFLE( 0, 0, 2, 2 ) );
__m256i rmin = _mm256_min_epu8( min4, min5 );
__m256i rmax = _mm256_max_epu8( max4, max5 );
__m256i range1 = _mm256_subs_epu8( rmax, rmin );
__m256i range2 = _mm256_sad_epu8( rmax, rmin );
uint16_t vrange0 = DivTable[_mm256_cvtsi256_si32( range2 ) >> 1];
uint16_t vrange1 = DivTable[_mm256_extract_epi16( range2, 8 ) >> 1];
__m256i range00 = _mm256_set1_epi16( vrange0 );
__m256i range = _mm256_inserti128_si256( range00, _mm_set1_epi16( vrange1 ), 1 );
__m256i inset1 = _mm256_srli_epi16( range1, 4 );
__m256i inset = _mm256_and_si256( inset1, _mm256_set1_epi8( 0xF ) );
__m256i min = _mm256_adds_epu8( rmin, inset );
__m256i max = _mm256_subs_epu8( rmax, inset );
__m256i c0 = _mm256_subs_epu8( px0, rmin );
__m256i c1 = _mm256_subs_epu8( px1, rmin );
__m256i c2 = _mm256_subs_epu8( px2, rmin );
__m256i c3 = _mm256_subs_epu8( px3, rmin );
__m256i is0 = _mm256_maddubs_epi16( c0, _mm256_set1_epi8( 1 ) );
__m256i is1 = _mm256_maddubs_epi16( c1, _mm256_set1_epi8( 1 ) );
__m256i is2 = _mm256_maddubs_epi16( c2, _mm256_set1_epi8( 1 ) );
__m256i is3 = _mm256_maddubs_epi16( c3, _mm256_set1_epi8( 1 ) );
__m256i s0 = _mm256_hadd_epi16( is0, is1 );
__m256i s1 = _mm256_hadd_epi16( is2, is3 );
__m256i m0 = _mm256_mulhi_epu16( s0, range );
__m256i m1 = _mm256_mulhi_epu16( s1, range );
__m256i p0 = _mm256_packus_epi16( m0, m1 );
__m256i p1 = _mm256_or_si256( _mm256_srai_epi32( p0, 6 ), _mm256_srai_epi32( p0, 12 ) );
__m256i p2 = _mm256_or_si256( _mm256_srai_epi32( p0, 18 ), p0 );
__m256i p3 = _mm256_or_si256( p1, p2 );
__m256i p =_mm256_shuffle_epi8( p3, _mm256_set1_epi32( 0x0C080400 ) );
__m256i mm0 = _mm256_unpacklo_epi8( _mm256_setzero_si256(), min );
__m256i mm1 = _mm256_unpacklo_epi8( _mm256_setzero_si256(), max );
__m256i mm2 = _mm256_unpacklo_epi64( mm1, mm0 );
__m256i mmr = _mm256_slli_epi64( _mm256_srli_epi64( mm2, 11 ), 11 );
__m256i mmg = _mm256_slli_epi64( _mm256_srli_epi64( mm2, 26 ), 5 );
__m256i mmb = _mm256_srli_epi64( _mm256_slli_epi64( mm2, 16 ), 59 );
__m256i mm3 = _mm256_or_si256( mmr, mmg );
__m256i mm4 = _mm256_or_si256( mm3, mmb );
__m256i mm5 = _mm256_shuffle_epi8( mm4, _mm256_set1_epi32( 0x09080100 ) );
__m256i d0 = _mm256_unpacklo_epi32( mm5, p );
__m256i d1 = _mm256_permute4x64_epi64( d0, _MM_SHUFFLE( 3, 2, 2, 0 ) );
__m128i d2 = _mm256_castsi256_si128( d1 );
__m128i mask = _mm_set_epi64x( 0xFFFF0000 | -solid1, 0xFFFF0000 | -solid0 );
__m128i d3 = _mm_and_si128( d2, mask );
_mm_storeu_si128( (__m128i*)dst, d3 );
for( int j=4; j<8; j++ ) dst[j] = (char)DxtcIndexTable[(uint8_t)dst[j]];
for( int j=12; j<16; j++ ) dst[j] = (char)DxtcIndexTable[(uint8_t)dst[j]];
dst += 16;
}
#endif
static const uint8_t AlphaIndexTable[8] = { 1, 7, 6, 5, 4, 3, 2, 0 };
static etcpak_force_inline uint64_t ProcessAlpha( const uint8_t* src )
{
uint8_t solid8 = *src;
uint16_t solid16 = uint16_t( solid8 ) | ( uint16_t( solid8 ) << 8 );
uint32_t solid32 = uint32_t( solid16 ) | ( uint32_t( solid16 ) << 16 );
uint64_t solid64 = uint64_t( solid32 ) | ( uint64_t( solid32 ) << 32 );
if( memcmp( src, &solid64, 8 ) == 0 && memcmp( src+8, &solid64, 8 ) == 0 )
{
return solid8;
}
uint8_t min = src[0];
uint8_t max = min;
for( int i=1; i<16; i++ )
{
const auto v = src[i];
if( v > max ) max = v;
else if( v < min ) min = v;
}
uint32_t range = ( 8 << 13 ) / ( 1 + max - min );
uint64_t data = 0;
for( int i=0; i<16; i++ )
{
uint8_t a = src[i] - min;
uint64_t idx = AlphaIndexTable[( a * range ) >> 13];
data |= idx << (i*3);
}
return max | ( min << 8 ) | ( data << 16 );
}
#ifdef __SSE4_1__
static etcpak_force_inline uint64_t ProcessRGB_SSE( __m128i px0, __m128i px1, __m128i px2, __m128i px3 )
{
__m128i smask = _mm_set1_epi32( 0xF8FCF8 );
__m128i sd0 = _mm_and_si128( px0, smask );
__m128i sd1 = _mm_and_si128( px1, smask );
__m128i sd2 = _mm_and_si128( px2, smask );
__m128i sd3 = _mm_and_si128( px3, smask );
__m128i sc = _mm_shuffle_epi32(sd0, _MM_SHUFFLE(0, 0, 0, 0));
__m128i sc0 = _mm_cmpeq_epi8(sd0, sc);
__m128i sc1 = _mm_cmpeq_epi8(sd1, sc);
__m128i sc2 = _mm_cmpeq_epi8(sd2, sc);
__m128i sc3 = _mm_cmpeq_epi8(sd3, sc);
__m128i sm0 = _mm_and_si128(sc0, sc1);
__m128i sm1 = _mm_and_si128(sc2, sc3);
__m128i sm = _mm_and_si128(sm0, sm1);
if( _mm_testc_si128(sm, _mm_set1_epi32(-1)) )
{
return uint64_t( to565( _mm_cvtsi128_si32( px0 ) ) ) << 16;
}
px0 = _mm_and_si128( px0, _mm_set1_epi32( 0xFFFFFF ) );
px1 = _mm_and_si128( px1, _mm_set1_epi32( 0xFFFFFF ) );
px2 = _mm_and_si128( px2, _mm_set1_epi32( 0xFFFFFF ) );
px3 = _mm_and_si128( px3, _mm_set1_epi32( 0xFFFFFF ) );
__m128i min0 = _mm_min_epu8( px0, px1 );
__m128i min1 = _mm_min_epu8( px2, px3 );
__m128i min2 = _mm_min_epu8( min0, min1 );
__m128i max0 = _mm_max_epu8( px0, px1 );
__m128i max1 = _mm_max_epu8( px2, px3 );
__m128i max2 = _mm_max_epu8( max0, max1 );
__m128i min3 = _mm_shuffle_epi32( min2, _MM_SHUFFLE( 2, 3, 0, 1 ) );
__m128i max3 = _mm_shuffle_epi32( max2, _MM_SHUFFLE( 2, 3, 0, 1 ) );
__m128i min4 = _mm_min_epu8( min2, min3 );
__m128i max4 = _mm_max_epu8( max2, max3 );
__m128i min5 = _mm_shuffle_epi32( min4, _MM_SHUFFLE( 0, 0, 2, 2 ) );
__m128i max5 = _mm_shuffle_epi32( max4, _MM_SHUFFLE( 0, 0, 2, 2 ) );
__m128i rmin = _mm_min_epu8( min4, min5 );
__m128i rmax = _mm_max_epu8( max4, max5 );
__m128i range1 = _mm_subs_epu8( rmax, rmin );
__m128i range2 = _mm_sad_epu8( rmax, rmin );
uint32_t vrange = _mm_cvtsi128_si32( range2 ) >> 1;
__m128i range = _mm_set1_epi16( DivTable[vrange] );
__m128i inset1 = _mm_srli_epi16( range1, 4 );
__m128i inset = _mm_and_si128( inset1, _mm_set1_epi8( 0xF ) );
__m128i min = _mm_adds_epu8( rmin, inset );
__m128i max = _mm_subs_epu8( rmax, inset );
__m128i c0 = _mm_subs_epu8( px0, rmin );
__m128i c1 = _mm_subs_epu8( px1, rmin );
__m128i c2 = _mm_subs_epu8( px2, rmin );
__m128i c3 = _mm_subs_epu8( px3, rmin );
__m128i is0 = _mm_maddubs_epi16( c0, _mm_set1_epi8( 1 ) );
__m128i is1 = _mm_maddubs_epi16( c1, _mm_set1_epi8( 1 ) );
__m128i is2 = _mm_maddubs_epi16( c2, _mm_set1_epi8( 1 ) );
__m128i is3 = _mm_maddubs_epi16( c3, _mm_set1_epi8( 1 ) );
__m128i s0 = _mm_hadd_epi16( is0, is1 );
__m128i s1 = _mm_hadd_epi16( is2, is3 );
__m128i m0 = _mm_mulhi_epu16( s0, range );
__m128i m1 = _mm_mulhi_epu16( s1, range );
__m128i p0 = _mm_packus_epi16( m0, m1 );
__m128i p1 = _mm_or_si128( _mm_srai_epi32( p0, 6 ), _mm_srai_epi32( p0, 12 ) );
__m128i p2 = _mm_or_si128( _mm_srai_epi32( p0, 18 ), p0 );
__m128i p3 = _mm_or_si128( p1, p2 );
__m128i p =_mm_shuffle_epi8( p3, _mm_set1_epi32( 0x0C080400 ) );
uint32_t vmin = _mm_cvtsi128_si32( min );
uint32_t vmax = _mm_cvtsi128_si32( max );
uint32_t vp = _mm_cvtsi128_si32( p );
return uint64_t( ( uint64_t( to565( vmin ) ) << 16 ) | to565( vmax ) | ( uint64_t( vp ) << 32 ) );
}
static etcpak_force_inline uint64_t ProcessAlpha_SSE( __m128i px0, __m128i px1, __m128i px2, __m128i px3 )
{
__m128i mask = _mm_setr_epi32( 0x0f0b0703, -1, -1, -1 );
__m128i m0 = _mm_shuffle_epi8( px0, mask );
__m128i m1 = _mm_shuffle_epi8( px1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
__m128i m2 = _mm_shuffle_epi8( px2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
__m128i m3 = _mm_shuffle_epi8( px3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
__m128i m4 = _mm_or_si128( m0, m1 );
__m128i m5 = _mm_or_si128( m2, m3 );
__m128i a = _mm_or_si128( m4, m5 );
__m128i solidCmp = _mm_shuffle_epi8( a, _mm_setzero_si128() );
__m128i cmpRes = _mm_cmpeq_epi8( a, solidCmp );
if( _mm_testc_si128( cmpRes, _mm_set1_epi32( -1 ) ) )
{
return _mm_cvtsi128_si32( a ) & 0xFF;
}
__m128i a1 = _mm_shuffle_epi32( a, _MM_SHUFFLE( 2, 3, 0, 1 ) );
__m128i max1 = _mm_max_epu8( a, a1 );
__m128i min1 = _mm_min_epu8( a, a1 );
__m128i amax2 = _mm_shuffle_epi32( max1, _MM_SHUFFLE( 0, 0, 2, 2 ) );
__m128i amin2 = _mm_shuffle_epi32( min1, _MM_SHUFFLE( 0, 0, 2, 2 ) );
__m128i max2 = _mm_max_epu8( max1, amax2 );
__m128i min2 = _mm_min_epu8( min1, amin2 );
__m128i amax3 = _mm_alignr_epi8( max2, max2, 2 );
__m128i amin3 = _mm_alignr_epi8( min2, min2, 2 );
__m128i max3 = _mm_max_epu8( max2, amax3 );
__m128i min3 = _mm_min_epu8( min2, amin3 );
__m128i amax4 = _mm_alignr_epi8( max3, max3, 1 );
__m128i amin4 = _mm_alignr_epi8( min3, min3, 1 );
__m128i max = _mm_max_epu8( max3, amax4 );
__m128i min = _mm_min_epu8( min3, amin4 );
__m128i minmax = _mm_unpacklo_epi8( max, min );
__m128i r = _mm_sub_epi8( max, min );
int range = _mm_cvtsi128_si32( r ) & 0xFF;
__m128i rv = _mm_set1_epi16( DivTableAlpha[range] );
__m128i v = _mm_sub_epi8( a, min );
__m128i lo16 = _mm_unpacklo_epi8( v, _mm_setzero_si128() );
__m128i hi16 = _mm_unpackhi_epi8( v, _mm_setzero_si128() );
__m128i lomul = _mm_mulhi_epu16( lo16, rv );
__m128i himul = _mm_mulhi_epu16( hi16, rv );
__m128i p0 = _mm_packus_epi16( lomul, himul );
__m128i p1 = _mm_or_si128( _mm_and_si128( p0, _mm_set1_epi16( 0x3F ) ), _mm_srai_epi16( _mm_and_si128( p0, _mm_set1_epi16( 0x3F00 ) ), 5 ) );
__m128i p2 = _mm_packus_epi16( p1, p1 );
uint64_t pi = _mm_cvtsi128_si64( p2 );
uint64_t data = 0;
for( int i=0; i<8; i++ )
{
uint64_t idx = AlphaIndexTable_SSE[(pi>>(i*8)) & 0x3F];
data |= idx << (i*6);
}
return (uint64_t)(uint16_t)_mm_cvtsi128_si32( minmax ) | ( data << 16 );
}
#endif
void CompressDxt1( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
{
#ifdef __AVX2__
if( width%8 == 0 )
{
blocks /= 2;
uint32_t buf[8*4];
int i = 0;
char* dst8 = (char*)dst;
do
{
auto tmp = (char*)buf;
memcpy( tmp, src + width * 0, 8*4 );
memcpy( tmp + 8*4, src + width * 1, 8*4 );
memcpy( tmp + 16*4, src + width * 2, 8*4 );
memcpy( tmp + 24*4, src + width * 3, 8*4 );
src += 8;
if( ++i == width/8 )
{
src += width * 3;
i = 0;
}
ProcessRGB_AVX( (uint8_t*)buf, dst8 );
}
while( --blocks );
}
else
#endif
{
uint32_t buf[4*4];
int i = 0;
auto ptr = dst;
do
{
auto tmp = (char*)buf;
memcpy( tmp, src + width * 0, 4*4 );
memcpy( tmp + 4*4, src + width * 1, 4*4 );
memcpy( tmp + 8*4, src + width * 2, 4*4 );
memcpy( tmp + 12*4, src + width * 3, 4*4 );
src += 4;
if( ++i == width/4 )
{
src += width * 3;
i = 0;
}
const auto c = ProcessRGB( (uint8_t*)buf );
uint8_t fix[8];
memcpy( fix, &c, 8 );
for( int j=4; j<8; j++ ) fix[j] = DxtcIndexTable[fix[j]];
memcpy( ptr, fix, sizeof( uint64_t ) );
ptr++;
}
while( --blocks );
}
}
void CompressDxt1Dither( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
{
uint32_t buf[4*4];
int i = 0;
auto ptr = dst;
do
{
auto tmp = (char*)buf;
memcpy( tmp, src + width * 0, 4*4 );
memcpy( tmp + 4*4, src + width * 1, 4*4 );
memcpy( tmp + 8*4, src + width * 2, 4*4 );
memcpy( tmp + 12*4, src + width * 3, 4*4 );
src += 4;
if( ++i == width/4 )
{
src += width * 3;
i = 0;
}
Dither( (uint8_t*)buf );
const auto c = ProcessRGB( (uint8_t*)buf );
uint8_t fix[8];
memcpy( fix, &c, 8 );
for( int j=4; j<8; j++ ) fix[j] = DxtcIndexTable[fix[j]];
memcpy( ptr, fix, sizeof( uint64_t ) );
ptr++;
}
while( --blocks );
}
void CompressDxt5( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
{
int i = 0;
auto ptr = dst;
do
{
#ifdef __SSE4_1__
__m128i px0 = _mm_loadu_si128( (__m128i*)( src + width * 0 ) );
__m128i px1 = _mm_loadu_si128( (__m128i*)( src + width * 1 ) );
__m128i px2 = _mm_loadu_si128( (__m128i*)( src + width * 2 ) );
__m128i px3 = _mm_loadu_si128( (__m128i*)( src + width * 3 ) );
src += 4;
if( ++i == width/4 )
{
src += width * 3;
i = 0;
}
*ptr++ = ProcessAlpha_SSE( px0, px1, px2, px3 );
const auto c = ProcessRGB_SSE( px0, px1, px2, px3 );
uint8_t fix[8];
memcpy( fix, &c, 8 );
for( int j=4; j<8; j++ ) fix[j] = DxtcIndexTable[fix[j]];
memcpy( ptr, fix, sizeof( uint64_t ) );
ptr++;
#else
uint32_t rgba[4*4];
uint8_t alpha[4*4];
auto tmp = (char*)rgba;
memcpy( tmp, src + width * 0, 4*4 );
memcpy( tmp + 4*4, src + width * 1, 4*4 );
memcpy( tmp + 8*4, src + width * 2, 4*4 );
memcpy( tmp + 12*4, src + width * 3, 4*4 );
src += 4;
if( ++i == width/4 )
{
src += width * 3;
i = 0;
}
for( int i=0; i<16; i++ )
{
alpha[i] = rgba[i] >> 24;
rgba[i] &= 0xFFFFFF;
}
*ptr++ = ProcessAlpha( alpha );
const auto c = ProcessRGB( (uint8_t*)rgba );
uint8_t fix[8];
memcpy( fix, &c, 8 );
for( int j=4; j<8; j++ ) fix[j] = DxtcIndexTable[fix[j]];
memcpy( ptr, fix, sizeof( uint64_t ) );
ptr++;
#endif
}
while( --blocks );
}

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#ifndef __PROCESSDXT1_HPP__
#define __PROCESSDXT1_HPP__
#include <stddef.h>
#include <stdint.h>
void CompressDxt1( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
void CompressDxt1Dither( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
void CompressDxt5( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
#endif

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#ifndef __PROCESSRGB_HPP__
#define __PROCESSRGB_HPP__
#include <stdint.h>
void CompressEtc1Alpha( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
void CompressEtc2Alpha( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
void CompressEtc1Rgb( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
void CompressEtc1RgbDither( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
void CompressEtc2Rgb( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
void CompressEtc2Rgba( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
#endif

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#ifndef __DARKRL__SEMAPHORE_HPP__
#define __DARKRL__SEMAPHORE_HPP__
#include <condition_variable>
#include <mutex>
class Semaphore
{
public:
Semaphore( int count ) : m_count( count ) {}
void lock()
{
std::unique_lock<std::mutex> lock( m_mutex );
m_cv.wait( lock, [this](){ return m_count != 0; } );
m_count--;
}
void unlock()
{
std::lock_guard<std::mutex> lock( m_mutex );
m_count++;
m_cv.notify_one();
}
bool try_lock()
{
std::lock_guard<std::mutex> lock( m_mutex );
if( m_count == 0 )
{
return false;
}
else
{
m_count--;
return true;
}
}
private:
std::mutex m_mutex;
std::condition_variable m_cv;
unsigned int m_count;
};
#endif

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#include <algorithm>
#ifdef _WIN32
# include <windows.h>
#else
# include <pthread.h>
# include <unistd.h>
#endif
#include "System.hpp"
unsigned int System::CPUCores()
{
static unsigned int cores = 0;
if( cores == 0 )
{
int tmp;
#ifdef _WIN32
SYSTEM_INFO info;
GetSystemInfo( &info );
tmp = (int)info.dwNumberOfProcessors;
#else
# ifndef _SC_NPROCESSORS_ONLN
# ifdef _SC_NPROC_ONLN
# define _SC_NPROCESSORS_ONLN _SC_NPROC_ONLN
# elif defined _SC_CRAY_NCPU
# define _SC_NPROCESSORS_ONLN _SC_CRAY_NCPU
# endif
# endif
tmp = (int)(long)sysconf( _SC_NPROCESSORS_ONLN );
#endif
cores = (unsigned int)std::max( tmp, 1 );
}
return cores;
}
void System::SetThreadName( std::thread& thread, const char* name )
{
#ifdef _MSC_VER
const DWORD MS_VC_EXCEPTION=0x406D1388;
# pragma pack( push, 8 )
struct THREADNAME_INFO
{
DWORD dwType;
LPCSTR szName;
DWORD dwThreadID;
DWORD dwFlags;
};
# pragma pack(pop)
DWORD ThreadId = GetThreadId( static_cast<HANDLE>( thread.native_handle() ) );
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = name;
info.dwThreadID = ThreadId;
info.dwFlags = 0;
__try
{
RaiseException( MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info );
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
}
#elif !defined(__APPLE__)
pthread_setname_np( thread.native_handle(), name );
#endif
}

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#ifndef __DARKRL__SYSTEM_HPP__
#define __DARKRL__SYSTEM_HPP__
#include <thread>
class System
{
public:
System() = delete;
static unsigned int CPUCores();
static void SetThreadName( std::thread& thread, const char* name );
};
#endif

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#include "Tables.hpp"
const int32_t g_table[8][4] = {
{ 2, 8, -2, -8 },
{ 5, 17, -5, -17 },
{ 9, 29, -9, -29 },
{ 13, 42, -13, -42 },
{ 18, 60, -18, -60 },
{ 24, 80, -24, -80 },
{ 33, 106, -33, -106 },
{ 47, 183, -47, -183 }
};
const int64_t g_table256[8][4] = {
{ 2*256, 8*256, -2*256, -8*256 },
{ 5*256, 17*256, -5*256, -17*256 },
{ 9*256, 29*256, -9*256, -29*256 },
{ 13*256, 42*256, -13*256, -42*256 },
{ 18*256, 60*256, -18*256, -60*256 },
{ 24*256, 80*256, -24*256, -80*256 },
{ 33*256, 106*256, -33*256, -106*256 },
{ 47*256, 183*256, -47*256, -183*256 }
};
const uint32_t g_id[4][16] = {
{ 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2 },
{ 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4 },
{ 7, 7, 6, 6, 7, 7, 6, 6, 7, 7, 6, 6, 7, 7, 6, 6 }
};
const uint32_t g_avg2[16] = {
0x00,
0x11,
0x22,
0x33,
0x44,
0x55,
0x66,
0x77,
0x88,
0x99,
0xAA,
0xBB,
0xCC,
0xDD,
0xEE,
0xFF
};
const uint32_t g_flags[64] = {
0x80800402, 0x80800402, 0x80800402, 0x80800402,
0x80800402, 0x80800402, 0x80800402, 0x8080E002,
0x80800402, 0x80800402, 0x8080E002, 0x8080E002,
0x80800402, 0x8080E002, 0x8080E002, 0x8080E002,
0x80000402, 0x80000402, 0x80000402, 0x80000402,
0x80000402, 0x80000402, 0x80000402, 0x8000E002,
0x80000402, 0x80000402, 0x8000E002, 0x8000E002,
0x80000402, 0x8000E002, 0x8000E002, 0x8000E002,
0x00800402, 0x00800402, 0x00800402, 0x00800402,
0x00800402, 0x00800402, 0x00800402, 0x0080E002,
0x00800402, 0x00800402, 0x0080E002, 0x0080E002,
0x00800402, 0x0080E002, 0x0080E002, 0x0080E002,
0x00000402, 0x00000402, 0x00000402, 0x00000402,
0x00000402, 0x00000402, 0x00000402, 0x0000E002,
0x00000402, 0x00000402, 0x0000E002, 0x0000E002,
0x00000402, 0x0000E002, 0x0000E002, 0x0000E002
};
const int32_t g_alpha[16][8] = {
{ -3, -6, -9, -15, 2, 5, 8, 14 },
{ -3, -7, -10, -13, 2, 6, 9, 12 },
{ -2, -5, -8, -13, 1, 4, 7, 12 },
{ -2, -4, -6, -13, 1, 3, 5, 12 },
{ -3, -6, -8, -12, 2, 5, 7, 11 },
{ -3, -7, -9, -11, 2, 6, 8, 10 },
{ -4, -7, -8, -11, 3, 6, 7, 10 },
{ -3, -5, -8, -11, 2, 4, 7, 10 },
{ -2, -6, -8, -10, 1, 5, 7, 9 },
{ -2, -5, -8, -10, 1, 4, 7, 9 },
{ -2, -4, -8, -10, 1, 3, 7, 9 },
{ -2, -5, -7, -10, 1, 4, 6, 9 },
{ -3, -4, -7, -10, 2, 3, 6, 9 },
{ -1, -2, -3, -10, 0, 1, 2, 9 },
{ -4, -6, -8, -9, 3, 5, 7, 8 },
{ -3, -5, -7, -9, 2, 4, 6, 8 }
};
const int32_t g_alphaRange[16] = {
0x100FF / ( 1 + g_alpha[0][7] - g_alpha[0][3] ),
0x100FF / ( 1 + g_alpha[1][7] - g_alpha[1][3] ),
0x100FF / ( 1 + g_alpha[2][7] - g_alpha[2][3] ),
0x100FF / ( 1 + g_alpha[3][7] - g_alpha[3][3] ),
0x100FF / ( 1 + g_alpha[4][7] - g_alpha[4][3] ),
0x100FF / ( 1 + g_alpha[5][7] - g_alpha[5][3] ),
0x100FF / ( 1 + g_alpha[6][7] - g_alpha[6][3] ),
0x100FF / ( 1 + g_alpha[7][7] - g_alpha[7][3] ),
0x100FF / ( 1 + g_alpha[8][7] - g_alpha[8][3] ),
0x100FF / ( 1 + g_alpha[9][7] - g_alpha[9][3] ),
0x100FF / ( 1 + g_alpha[10][7] - g_alpha[10][3] ),
0x100FF / ( 1 + g_alpha[11][7] - g_alpha[11][3] ),
0x100FF / ( 1 + g_alpha[12][7] - g_alpha[12][3] ),
0x100FF / ( 1 + g_alpha[13][7] - g_alpha[13][3] ),
0x100FF / ( 1 + g_alpha[14][7] - g_alpha[14][3] ),
0x100FF / ( 1 + g_alpha[15][7] - g_alpha[15][3] ),
};
#ifdef __SSE4_1__
const __m128i g_table_SIMD[2] =
{
_mm_setr_epi16( 2, 5, 9, 13, 18, 24, 33, 47),
_mm_setr_epi16( 8, 17, 29, 42, 60, 80, 106, 183)
};
const __m128i g_table128_SIMD[2] =
{
_mm_setr_epi16( 2*128, 5*128, 9*128, 13*128, 18*128, 24*128, 33*128, 47*128),
_mm_setr_epi16( 8*128, 17*128, 29*128, 42*128, 60*128, 80*128, 106*128, 183*128)
};
const __m128i g_table256_SIMD[4] =
{
_mm_setr_epi32( 2*256, 5*256, 9*256, 13*256),
_mm_setr_epi32( 8*256, 17*256, 29*256, 42*256),
_mm_setr_epi32( 18*256, 24*256, 33*256, 47*256),
_mm_setr_epi32( 60*256, 80*256, 106*256, 183*256)
};
const __m128i g_alpha_SIMD[16] = {
_mm_setr_epi16( g_alpha[ 0][0], g_alpha[ 0][1], g_alpha[ 0][2], g_alpha[ 0][3], g_alpha[ 0][4], g_alpha[ 0][5], g_alpha[ 0][6], g_alpha[ 0][7] ),
_mm_setr_epi16( g_alpha[ 1][0], g_alpha[ 1][1], g_alpha[ 1][2], g_alpha[ 1][3], g_alpha[ 1][4], g_alpha[ 1][5], g_alpha[ 1][6], g_alpha[ 1][7] ),
_mm_setr_epi16( g_alpha[ 2][0], g_alpha[ 2][1], g_alpha[ 2][2], g_alpha[ 2][3], g_alpha[ 2][4], g_alpha[ 2][5], g_alpha[ 2][6], g_alpha[ 2][7] ),
_mm_setr_epi16( g_alpha[ 3][0], g_alpha[ 3][1], g_alpha[ 3][2], g_alpha[ 3][3], g_alpha[ 3][4], g_alpha[ 3][5], g_alpha[ 3][6], g_alpha[ 3][7] ),
_mm_setr_epi16( g_alpha[ 4][0], g_alpha[ 4][1], g_alpha[ 4][2], g_alpha[ 4][3], g_alpha[ 4][4], g_alpha[ 4][5], g_alpha[ 4][6], g_alpha[ 4][7] ),
_mm_setr_epi16( g_alpha[ 5][0], g_alpha[ 5][1], g_alpha[ 5][2], g_alpha[ 5][3], g_alpha[ 5][4], g_alpha[ 5][5], g_alpha[ 5][6], g_alpha[ 5][7] ),
_mm_setr_epi16( g_alpha[ 6][0], g_alpha[ 6][1], g_alpha[ 6][2], g_alpha[ 6][3], g_alpha[ 6][4], g_alpha[ 6][5], g_alpha[ 6][6], g_alpha[ 6][7] ),
_mm_setr_epi16( g_alpha[ 7][0], g_alpha[ 7][1], g_alpha[ 7][2], g_alpha[ 7][3], g_alpha[ 7][4], g_alpha[ 7][5], g_alpha[ 7][6], g_alpha[ 7][7] ),
_mm_setr_epi16( g_alpha[ 8][0], g_alpha[ 8][1], g_alpha[ 8][2], g_alpha[ 8][3], g_alpha[ 8][4], g_alpha[ 8][5], g_alpha[ 8][6], g_alpha[ 8][7] ),
_mm_setr_epi16( g_alpha[ 9][0], g_alpha[ 9][1], g_alpha[ 9][2], g_alpha[ 9][3], g_alpha[ 9][4], g_alpha[ 9][5], g_alpha[ 9][6], g_alpha[ 9][7] ),
_mm_setr_epi16( g_alpha[10][0], g_alpha[10][1], g_alpha[10][2], g_alpha[10][3], g_alpha[10][4], g_alpha[10][5], g_alpha[10][6], g_alpha[10][7] ),
_mm_setr_epi16( g_alpha[11][0], g_alpha[11][1], g_alpha[11][2], g_alpha[11][3], g_alpha[11][4], g_alpha[11][5], g_alpha[11][6], g_alpha[11][7] ),
_mm_setr_epi16( g_alpha[12][0], g_alpha[12][1], g_alpha[12][2], g_alpha[12][3], g_alpha[12][4], g_alpha[12][5], g_alpha[12][6], g_alpha[12][7] ),
_mm_setr_epi16( g_alpha[13][0], g_alpha[13][1], g_alpha[13][2], g_alpha[13][3], g_alpha[13][4], g_alpha[13][5], g_alpha[13][6], g_alpha[13][7] ),
_mm_setr_epi16( g_alpha[14][0], g_alpha[14][1], g_alpha[14][2], g_alpha[14][3], g_alpha[14][4], g_alpha[14][5], g_alpha[14][6], g_alpha[14][7] ),
_mm_setr_epi16( g_alpha[15][0], g_alpha[15][1], g_alpha[15][2], g_alpha[15][3], g_alpha[15][4], g_alpha[15][5], g_alpha[15][6], g_alpha[15][7] ),
};
const __m128i g_alphaRange_SIMD = _mm_setr_epi16(
g_alphaRange[0],
g_alphaRange[1],
g_alphaRange[4],
g_alphaRange[5],
g_alphaRange[8],
g_alphaRange[14],
0,
0 );
#endif
#ifdef __AVX2__
const __m256i g_alpha_AVX[8] = {
_mm256_setr_epi16( g_alpha[ 0][0], g_alpha[ 1][0], g_alpha[ 2][0], g_alpha[ 3][0], g_alpha[ 4][0], g_alpha[ 5][0], g_alpha[ 6][0], g_alpha[ 7][0], g_alpha[ 8][0], g_alpha[ 9][0], g_alpha[10][0], g_alpha[11][0], g_alpha[12][0], g_alpha[13][0], g_alpha[14][0], g_alpha[15][0] ),
_mm256_setr_epi16( g_alpha[ 0][1], g_alpha[ 1][1], g_alpha[ 2][1], g_alpha[ 3][1], g_alpha[ 4][1], g_alpha[ 5][1], g_alpha[ 6][1], g_alpha[ 7][1], g_alpha[ 8][1], g_alpha[ 9][1], g_alpha[10][1], g_alpha[11][1], g_alpha[12][1], g_alpha[13][1], g_alpha[14][1], g_alpha[15][1] ),
_mm256_setr_epi16( g_alpha[ 0][2], g_alpha[ 1][2], g_alpha[ 2][2], g_alpha[ 3][2], g_alpha[ 4][2], g_alpha[ 5][2], g_alpha[ 6][2], g_alpha[ 7][2], g_alpha[ 8][2], g_alpha[ 9][2], g_alpha[10][2], g_alpha[11][2], g_alpha[12][2], g_alpha[13][2], g_alpha[14][2], g_alpha[15][2] ),
_mm256_setr_epi16( g_alpha[ 0][3], g_alpha[ 1][3], g_alpha[ 2][3], g_alpha[ 3][3], g_alpha[ 4][3], g_alpha[ 5][3], g_alpha[ 6][3], g_alpha[ 7][3], g_alpha[ 8][3], g_alpha[ 9][3], g_alpha[10][3], g_alpha[11][3], g_alpha[12][3], g_alpha[13][3], g_alpha[14][3], g_alpha[15][3] ),
_mm256_setr_epi16( g_alpha[ 0][4], g_alpha[ 1][4], g_alpha[ 2][4], g_alpha[ 3][4], g_alpha[ 4][4], g_alpha[ 5][4], g_alpha[ 6][4], g_alpha[ 7][4], g_alpha[ 8][4], g_alpha[ 9][4], g_alpha[10][4], g_alpha[11][4], g_alpha[12][4], g_alpha[13][4], g_alpha[14][4], g_alpha[15][4] ),
_mm256_setr_epi16( g_alpha[ 0][5], g_alpha[ 1][5], g_alpha[ 2][5], g_alpha[ 3][5], g_alpha[ 4][5], g_alpha[ 5][5], g_alpha[ 6][5], g_alpha[ 7][5], g_alpha[ 8][5], g_alpha[ 9][5], g_alpha[10][5], g_alpha[11][5], g_alpha[12][5], g_alpha[13][5], g_alpha[14][5], g_alpha[15][5] ),
_mm256_setr_epi16( g_alpha[ 0][6], g_alpha[ 1][6], g_alpha[ 2][6], g_alpha[ 3][6], g_alpha[ 4][6], g_alpha[ 5][6], g_alpha[ 6][6], g_alpha[ 7][6], g_alpha[ 8][6], g_alpha[ 9][6], g_alpha[10][6], g_alpha[11][6], g_alpha[12][6], g_alpha[13][6], g_alpha[14][6], g_alpha[15][6] ),
_mm256_setr_epi16( g_alpha[ 0][7], g_alpha[ 1][7], g_alpha[ 2][7], g_alpha[ 3][7], g_alpha[ 4][7], g_alpha[ 5][7], g_alpha[ 6][7], g_alpha[ 7][7], g_alpha[ 8][7], g_alpha[ 9][7], g_alpha[10][7], g_alpha[11][7], g_alpha[12][7], g_alpha[13][7], g_alpha[14][7], g_alpha[15][7] ),
};
const __m256i g_alphaRange_AVX = _mm256_setr_epi16(
g_alphaRange[ 0], g_alphaRange[ 1], g_alphaRange[ 2], g_alphaRange[ 3], g_alphaRange[ 4], g_alphaRange[ 5], g_alphaRange[ 6], g_alphaRange[ 7],
g_alphaRange[ 8], g_alphaRange[ 9], g_alphaRange[10], g_alphaRange[11], g_alphaRange[12], g_alphaRange[13], g_alphaRange[14], g_alphaRange[15]
);
#endif
#ifdef __ARM_NEON
const int16x8_t g_table128_NEON[2] =
{
{ 2*128, 5*128, 9*128, 13*128, 18*128, 24*128, 33*128, 47*128 },
{ 8*128, 17*128, 29*128, 42*128, 60*128, 80*128, 106*128, 183*128 }
};
const int32x4_t g_table256_NEON[4] =
{
{ 2*256, 5*256, 9*256, 13*256 },
{ 8*256, 17*256, 29*256, 42*256 },
{ 18*256, 24*256, 33*256, 47*256 },
{ 60*256, 80*256, 106*256, 183*256 }
};
const int16x8_t g_alpha_NEON[16] =
{
{ -3, -6, -9, -15, 2, 5, 8, 14 },
{ -3, -7, -10, -13, 2, 6, 9, 12 },
{ -2, -5, -8, -13, 1, 4, 7, 12 },
{ -2, -4, -6, -13, 1, 3, 5, 12 },
{ -3, -6, -8, -12, 2, 5, 7, 11 },
{ -3, -7, -9, -11, 2, 6, 8, 10 },
{ -4, -7, -8, -11, 3, 6, 7, 10 },
{ -3, -5, -8, -11, 2, 4, 7, 10 },
{ -2, -6, -8, -10, 1, 5, 7, 9 },
{ -2, -5, -8, -10, 1, 4, 7, 9 },
{ -2, -4, -8, -10, 1, 3, 7, 9 },
{ -2, -5, -7, -10, 1, 4, 6, 9 },
{ -3, -4, -7, -10, 2, 3, 6, 9 },
{ -1, -2, -3, -10, 0, 1, 2, 9 },
{ -4, -6, -8, -9, 3, 5, 7, 8 },
{ -3, -5, -7, -9, 2, 4, 6, 8 }
};
const int16x8_t g_alphaRange_NEON =
{
(int16_t)g_alphaRange[0],
(int16_t)g_alphaRange[1],
(int16_t)g_alphaRange[4],
(int16_t)g_alphaRange[5],
(int16_t)g_alphaRange[8],
(int16_t)g_alphaRange[14],
0,
0
};
#endif

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#ifndef __TABLES_HPP__
#define __TABLES_HPP__
#include <stdint.h>
#ifdef __AVX2__
# include <immintrin.h>
#endif
#ifdef __SSE4_1__
# include <smmintrin.h>
#endif
#ifdef __ARM_NEON
# include <arm_neon.h>
#endif
extern const int32_t g_table[8][4];
extern const int64_t g_table256[8][4];
extern const uint32_t g_id[4][16];
extern const uint32_t g_avg2[16];
extern const uint32_t g_flags[64];
extern const int32_t g_alpha[16][8];
extern const int32_t g_alphaRange[16];
#ifdef __SSE4_1__
extern const __m128i g_table_SIMD[2];
extern const __m128i g_table128_SIMD[2];
extern const __m128i g_table256_SIMD[4];
extern const __m128i g_alpha_SIMD[16];
extern const __m128i g_alphaRange_SIMD;
#endif
#ifdef __AVX2__
extern const __m256i g_alpha_AVX[8];
extern const __m256i g_alphaRange_AVX;
#endif
#ifdef __ARM_NEON
extern const int16x8_t g_table128_NEON[2];
extern const int32x4_t g_table256_NEON[4];
extern const int16x8_t g_alpha_NEON[16];
extern const int16x8_t g_alphaRange_NEON;
#endif
#endif

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#include <assert.h>
#include <stdio.h>
#include "Debug.hpp"
#include "System.hpp"
#include "TaskDispatch.hpp"
static TaskDispatch* s_instance = nullptr;
TaskDispatch::TaskDispatch( size_t workers )
: m_exit( false )
, m_jobs( 0 )
{
assert( !s_instance );
s_instance = this;
assert( workers >= 1 );
workers--;
m_workers.reserve( workers );
for( size_t i=0; i<workers; i++ )
{
char tmp[16];
sprintf( tmp, "Worker %zu", i );
#ifdef __APPLE__
auto worker = std::thread( [this, tmp]{
pthread_setname_np( tmp );
Worker();
} );
#else
auto worker = std::thread( [this]{ Worker(); } );
#endif
System::SetThreadName( worker, tmp );
m_workers.emplace_back( std::move( worker ) );
}
DBGPRINT( "Task dispatcher with " << m_workers.size() + 1 << " workers" );
}
TaskDispatch::~TaskDispatch()
{
m_exit = true;
m_queueLock.lock();
m_cvWork.notify_all();
m_queueLock.unlock();
for( auto& worker : m_workers )
{
worker.join();
}
assert( s_instance );
s_instance = nullptr;
}
void TaskDispatch::Queue( const std::function<void(void)>& f )
{
std::unique_lock<std::mutex> lock( s_instance->m_queueLock );
s_instance->m_queue.emplace_back( f );
const auto size = s_instance->m_queue.size();
lock.unlock();
if( size > 1 )
{
s_instance->m_cvWork.notify_one();
}
}
void TaskDispatch::Queue( std::function<void(void)>&& f )
{
std::unique_lock<std::mutex> lock( s_instance->m_queueLock );
s_instance->m_queue.emplace_back( std::move( f ) );
const auto size = s_instance->m_queue.size();
lock.unlock();
if( size > 1 )
{
s_instance->m_cvWork.notify_one();
}
}
void TaskDispatch::Sync()
{
std::unique_lock<std::mutex> lock( s_instance->m_queueLock );
while( !s_instance->m_queue.empty() )
{
auto f = s_instance->m_queue.back();
s_instance->m_queue.pop_back();
lock.unlock();
f();
lock.lock();
}
s_instance->m_cvJobs.wait( lock, []{ return s_instance->m_jobs == 0; } );
}
void TaskDispatch::Worker()
{
for(;;)
{
std::unique_lock<std::mutex> lock( m_queueLock );
m_cvWork.wait( lock, [this]{ return !m_queue.empty() || m_exit; } );
if( m_exit ) return;
auto f = m_queue.back();
m_queue.pop_back();
m_jobs++;
lock.unlock();
f();
lock.lock();
m_jobs--;
bool notify = m_jobs == 0 && m_queue.empty();
lock.unlock();
if( notify )
{
m_cvJobs.notify_all();
}
}
}

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#ifndef __DARKRL__TASKDISPATCH_HPP__
#define __DARKRL__TASKDISPATCH_HPP__
#include <atomic>
#include <condition_variable>
#include <functional>
#include <mutex>
#include <thread>
#include <vector>
class TaskDispatch
{
public:
TaskDispatch( size_t workers );
~TaskDispatch();
static void Queue( const std::function<void(void)>& f );
static void Queue( std::function<void(void)>&& f );
static void Sync();
private:
void Worker();
std::vector<std::function<void(void)>> m_queue;
std::mutex m_queueLock;
std::condition_variable m_cvWork, m_cvJobs;
std::atomic<bool> m_exit;
size_t m_jobs;
std::vector<std::thread> m_workers;
};
#endif

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#include <chrono>
#include "Timing.hpp"
uint64_t GetTime()
{
return std::chrono::time_point_cast<std::chrono::microseconds>( std::chrono::high_resolution_clock::now() ).time_since_epoch().count();
}

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#ifndef __DARKRL__TIMING_HPP__
#define __DARKRL__TIMING_HPP__
#include <stdint.h>
uint64_t GetTime();
#endif

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#ifndef __DARKRL__VECTOR_HPP__
#define __DARKRL__VECTOR_HPP__
#include <assert.h>
#include <algorithm>
#include <math.h>
#include <stdint.h>
#include "Math.hpp"
template<class T>
struct Vector2
{
Vector2() : x( 0 ), y( 0 ) {}
Vector2( T v ) : x( v ), y( v ) {}
Vector2( T _x, T _y ) : x( _x ), y( _y ) {}
bool operator==( const Vector2<T>& rhs ) const { return x == rhs.x && y == rhs.y; }
bool operator!=( const Vector2<T>& rhs ) const { return !( *this == rhs ); }
Vector2<T>& operator+=( const Vector2<T>& rhs )
{
x += rhs.x;
y += rhs.y;
return *this;
}
Vector2<T>& operator-=( const Vector2<T>& rhs )
{
x -= rhs.x;
y -= rhs.y;
return *this;
}
Vector2<T>& operator*=( const Vector2<T>& rhs )
{
x *= rhs.x;
y *= rhs.y;
return *this;
}
T x, y;
};
template<class T>
Vector2<T> operator+( const Vector2<T>& lhs, const Vector2<T>& rhs )
{
return Vector2<T>( lhs.x + rhs.x, lhs.y + rhs.y );
}
template<class T>
Vector2<T> operator-( const Vector2<T>& lhs, const Vector2<T>& rhs )
{
return Vector2<T>( lhs.x - rhs.x, lhs.y - rhs.y );
}
template<class T>
Vector2<T> operator*( const Vector2<T>& lhs, const float& rhs )
{
return Vector2<T>( lhs.x * rhs, lhs.y * rhs );
}
template<class T>
Vector2<T> operator/( const Vector2<T>& lhs, const T& rhs )
{
return Vector2<T>( lhs.x / rhs, lhs.y / rhs );
}
typedef Vector2<int32_t> v2i;
typedef Vector2<float> v2f;
template<class T>
struct Vector3
{
Vector3() : x( 0 ), y( 0 ), z( 0 ) {}
Vector3( T v ) : x( v ), y( v ), z( v ) {}
Vector3( T _x, T _y, T _z ) : x( _x ), y( _y ), z( _z ) {}
template<class Y>
Vector3( const Vector3<Y>& v ) : x( T( v.x ) ), y( T( v.y ) ), z( T( v.z ) ) {}
T Luminance() const { return T( x * 0.3f + y * 0.59f + z * 0.11f ); }
void Clamp()
{
x = std::min( T(1), std::max( T(0), x ) );
y = std::min( T(1), std::max( T(0), y ) );
z = std::min( T(1), std::max( T(0), z ) );
}
bool operator==( const Vector3<T>& rhs ) const { return x == rhs.x && y == rhs.y && z == rhs.z; }
bool operator!=( const Vector2<T>& rhs ) const { return !( *this == rhs ); }
T& operator[]( unsigned int idx ) { assert( idx < 3 ); return ((T*)this)[idx]; }
const T& operator[]( unsigned int idx ) const { assert( idx < 3 ); return ((T*)this)[idx]; }
Vector3<T> operator+=( const Vector3<T>& rhs )
{
x += rhs.x;
y += rhs.y;
z += rhs.z;
return *this;
}
Vector3<T> operator*=( const Vector3<T>& rhs )
{
x *= rhs.x;
y *= rhs.y;
z *= rhs.z;
return *this;
}
Vector3<T> operator*=( const float& rhs )
{
x *= rhs;
y *= rhs;
z *= rhs;
return *this;
}
T x, y, z;
T padding;
};
template<class T>
Vector3<T> operator+( const Vector3<T>& lhs, const Vector3<T>& rhs )
{
return Vector3<T>( lhs.x + rhs.x, lhs.y + rhs.y, lhs.z + rhs.z );
}
template<class T>
Vector3<T> operator-( const Vector3<T>& lhs, const Vector3<T>& rhs )
{
return Vector3<T>( lhs.x - rhs.x, lhs.y - rhs.y, lhs.z - rhs.z );
}
template<class T>
Vector3<T> operator*( const Vector3<T>& lhs, const Vector3<T>& rhs )
{
return Vector3<T>( lhs.x * rhs.x, lhs.y * rhs.y, lhs.z * rhs.z );
}
template<class T>
Vector3<T> operator*( const Vector3<T>& lhs, const float& rhs )
{
return Vector3<T>( T( lhs.x * rhs ), T( lhs.y * rhs ), T( lhs.z * rhs ) );
}
template<class T>
Vector3<T> operator/( const Vector3<T>& lhs, const T& rhs )
{
return Vector3<T>( lhs.x / rhs, lhs.y / rhs, lhs.z / rhs );
}
template<class T>
bool operator<( const Vector3<T>& lhs, const Vector3<T>& rhs )
{
return lhs.Luminance() < rhs.Luminance();
}
typedef Vector3<int32_t> v3i;
typedef Vector3<float> v3f;
typedef Vector3<uint8_t> v3b;
static inline v3b v3f_to_v3b( const v3f& v )
{
return v3b( uint8_t( std::min( 1.f, v.x ) * 255 ), uint8_t( std::min( 1.f, v.y ) * 255 ), uint8_t( std::min( 1.f, v.z ) * 255 ) );
}
template<class T>
Vector3<T> Mix( const Vector3<T>& v1, const Vector3<T>& v2, float amount )
{
return v1 + ( v2 - v1 ) * amount;
}
template<>
inline v3b Mix( const v3b& v1, const v3b& v2, float amount )
{
return v3b( v3f( v1 ) + ( v3f( v2 ) - v3f( v1 ) ) * amount );
}
template<class T>
Vector3<T> Desaturate( const Vector3<T>& v )
{
T l = v.Luminance();
return Vector3<T>( l, l, l );
}
template<class T>
Vector3<T> Desaturate( const Vector3<T>& v, float mul )
{
T l = T( v.Luminance() * mul );
return Vector3<T>( l, l, l );
}
template<class T>
Vector3<T> pow( const Vector3<T>& base, float exponent )
{
return Vector3<T>(
pow( base.x, exponent ),
pow( base.y, exponent ),
pow( base.z, exponent ) );
}
template<class T>
Vector3<T> sRGB2linear( const Vector3<T>& v )
{
return Vector3<T>(
sRGB2linear( v.x ),
sRGB2linear( v.y ),
sRGB2linear( v.z ) );
}
template<class T>
Vector3<T> linear2sRGB( const Vector3<T>& v )
{
return Vector3<T>(
linear2sRGB( v.x ),
linear2sRGB( v.y ),
linear2sRGB( v.z ) );
}
#endif

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/*
LZ4 - Fast LZ compression algorithm
Header File
Copyright (C) 2011-2015, Yann Collet.
BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
You can contact the author at :
- LZ4 source repository : https://github.com/Cyan4973/lz4
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
*/
#pragma once
#if defined (__cplusplus)
extern "C" {
#endif
/*
* lz4.h provides block compression functions, and gives full buffer control to programmer.
* If you need to generate inter-operable compressed data (respecting LZ4 frame specification),
* and can let the library handle its own memory, please use lz4frame.h instead.
*/
/**************************************
* Version
**************************************/
#define LZ4_VERSION_MAJOR 1 /* for breaking interface changes */
#define LZ4_VERSION_MINOR 7 /* for new (non-breaking) interface capabilities */
#define LZ4_VERSION_RELEASE 1 /* for tweaks, bug-fixes, or development */
#define LZ4_VERSION_NUMBER (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)
int LZ4_versionNumber (void);
/**************************************
* Tuning parameter
**************************************/
/*
* LZ4_MEMORY_USAGE :
* Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.)
* Increasing memory usage improves compression ratio
* Reduced memory usage can improve speed, due to cache effect
* Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
*/
#define LZ4_MEMORY_USAGE 14
/**************************************
* Simple Functions
**************************************/
int LZ4_compress_default(const char* source, char* dest, int sourceSize, int maxDestSize);
int LZ4_decompress_safe (const char* source, char* dest, int compressedSize, int maxDecompressedSize);
/*
LZ4_compress_default() :
Compresses 'sourceSize' bytes from buffer 'source'
into already allocated 'dest' buffer of size 'maxDestSize'.
Compression is guaranteed to succeed if 'maxDestSize' >= LZ4_compressBound(sourceSize).
It also runs faster, so it's a recommended setting.
If the function cannot compress 'source' into a more limited 'dest' budget,
compression stops *immediately*, and the function result is zero.
As a consequence, 'dest' content is not valid.
This function never writes outside 'dest' buffer, nor read outside 'source' buffer.
sourceSize : Max supported value is LZ4_MAX_INPUT_VALUE
maxDestSize : full or partial size of buffer 'dest' (which must be already allocated)
return : the number of bytes written into buffer 'dest' (necessarily <= maxOutputSize)
or 0 if compression fails
LZ4_decompress_safe() :
compressedSize : is the precise full size of the compressed block.
maxDecompressedSize : is the size of destination buffer, which must be already allocated.
return : the number of bytes decompressed into destination buffer (necessarily <= maxDecompressedSize)
If destination buffer is not large enough, decoding will stop and output an error code (<0).
If the source stream is detected malformed, the function will stop decoding and return a negative result.
This function is protected against buffer overflow exploits, including malicious data packets.
It never writes outside output buffer, nor reads outside input buffer.
*/
/**************************************
* Advanced Functions
**************************************/
#define LZ4_MAX_INPUT_SIZE 0x7E000000 /* 2 113 929 216 bytes */
#define LZ4_COMPRESSBOUND(isize) ((unsigned)(isize) > (unsigned)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
/*
LZ4_compressBound() :
Provides the maximum size that LZ4 compression may output in a "worst case" scenario (input data not compressible)
This function is primarily useful for memory allocation purposes (destination buffer size).
Macro LZ4_COMPRESSBOUND() is also provided for compilation-time evaluation (stack memory allocation for example).
Note that LZ4_compress_default() compress faster when dest buffer size is >= LZ4_compressBound(srcSize)
inputSize : max supported value is LZ4_MAX_INPUT_SIZE
return : maximum output size in a "worst case" scenario
or 0, if input size is too large ( > LZ4_MAX_INPUT_SIZE)
*/
int LZ4_compressBound(int inputSize);
/*
LZ4_compress_fast() :
Same as LZ4_compress_default(), but allows to select an "acceleration" factor.
The larger the acceleration value, the faster the algorithm, but also the lesser the compression.
It's a trade-off. It can be fine tuned, with each successive value providing roughly +~3% to speed.
An acceleration value of "1" is the same as regular LZ4_compress_default()
Values <= 0 will be replaced by ACCELERATION_DEFAULT (see lz4.c), which is 1.
*/
int LZ4_compress_fast (const char* source, char* dest, int sourceSize, int maxDestSize, int acceleration);
/*
LZ4_compress_fast_extState() :
Same compression function, just using an externally allocated memory space to store compression state.
Use LZ4_sizeofState() to know how much memory must be allocated,
and allocate it on 8-bytes boundaries (using malloc() typically).
Then, provide it as 'void* state' to compression function.
*/
int LZ4_sizeofState(void);
int LZ4_compress_fast_extState (void* state, const char* source, char* dest, int inputSize, int maxDestSize, int acceleration);
/*
LZ4_compress_destSize() :
Reverse the logic, by compressing as much data as possible from 'source' buffer
into already allocated buffer 'dest' of size 'targetDestSize'.
This function either compresses the entire 'source' content into 'dest' if it's large enough,
or fill 'dest' buffer completely with as much data as possible from 'source'.
*sourceSizePtr : will be modified to indicate how many bytes where read from 'source' to fill 'dest'.
New value is necessarily <= old value.
return : Nb bytes written into 'dest' (necessarily <= targetDestSize)
or 0 if compression fails
*/
int LZ4_compress_destSize (const char* source, char* dest, int* sourceSizePtr, int targetDestSize);
/*
LZ4_decompress_fast() :
originalSize : is the original and therefore uncompressed size
return : the number of bytes read from the source buffer (in other words, the compressed size)
If the source stream is detected malformed, the function will stop decoding and return a negative result.
Destination buffer must be already allocated. Its size must be a minimum of 'originalSize' bytes.
note : This function fully respect memory boundaries for properly formed compressed data.
It is a bit faster than LZ4_decompress_safe().
However, it does not provide any protection against intentionally modified data stream (malicious input).
Use this function in trusted environment only (data to decode comes from a trusted source).
*/
int LZ4_decompress_fast (const char* source, char* dest, int originalSize);
/*
LZ4_decompress_safe_partial() :
This function decompress a compressed block of size 'compressedSize' at position 'source'
into destination buffer 'dest' of size 'maxDecompressedSize'.
The function tries to stop decompressing operation as soon as 'targetOutputSize' has been reached,
reducing decompression time.
return : the number of bytes decoded in the destination buffer (necessarily <= maxDecompressedSize)
Note : this number can be < 'targetOutputSize' should the compressed block to decode be smaller.
Always control how many bytes were decoded.
If the source stream is detected malformed, the function will stop decoding and return a negative result.
This function never writes outside of output buffer, and never reads outside of input buffer. It is therefore protected against malicious data packets
*/
int LZ4_decompress_safe_partial (const char* source, char* dest, int compressedSize, int targetOutputSize, int maxDecompressedSize);
/***********************************************
* Streaming Compression Functions
***********************************************/
#define LZ4_STREAMSIZE_U64 ((1 << (LZ4_MEMORY_USAGE-3)) + 4)
#define LZ4_STREAMSIZE (LZ4_STREAMSIZE_U64 * sizeof(long long))
/*
* LZ4_stream_t
* information structure to track an LZ4 stream.
* important : init this structure content before first use !
* note : only allocated directly the structure if you are statically linking LZ4
* If you are using liblz4 as a DLL, please use below construction methods instead.
*/
typedef struct { long long table[LZ4_STREAMSIZE_U64]; } LZ4_stream_t;
/*
* LZ4_resetStream
* Use this function to init an allocated LZ4_stream_t structure
*/
void LZ4_resetStream (LZ4_stream_t* streamPtr);
/*
* LZ4_createStream will allocate and initialize an LZ4_stream_t structure
* LZ4_freeStream releases its memory.
* In the context of a DLL (liblz4), please use these methods rather than the static struct.
* They are more future proof, in case of a change of LZ4_stream_t size.
*/
LZ4_stream_t* LZ4_createStream(void);
int LZ4_freeStream (LZ4_stream_t* streamPtr);
/*
* LZ4_loadDict
* Use this function to load a static dictionary into LZ4_stream.
* Any previous data will be forgotten, only 'dictionary' will remain in memory.
* Loading a size of 0 is allowed.
* Return : dictionary size, in bytes (necessarily <= 64 KB)
*/
int LZ4_loadDict (LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
/*
* LZ4_compress_fast_continue
* Compress buffer content 'src', using data from previously compressed blocks as dictionary to improve compression ratio.
* Important : Previous data blocks are assumed to still be present and unmodified !
* 'dst' buffer must be already allocated.
* If maxDstSize >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster.
* If not, and if compressed data cannot fit into 'dst' buffer size, compression stops, and function returns a zero.
*/
int LZ4_compress_fast_continue (LZ4_stream_t* streamPtr, const char* src, char* dst, int srcSize, int maxDstSize, int acceleration);
/*
* LZ4_saveDict
* If previously compressed data block is not guaranteed to remain available at its memory location
* save it into a safer place (char* safeBuffer)
* Note : you don't need to call LZ4_loadDict() afterwards,
* dictionary is immediately usable, you can therefore call LZ4_compress_fast_continue()
* Return : saved dictionary size in bytes (necessarily <= dictSize), or 0 if error
*/
int LZ4_saveDict (LZ4_stream_t* streamPtr, char* safeBuffer, int dictSize);
/************************************************
* Streaming Decompression Functions
************************************************/
#define LZ4_STREAMDECODESIZE_U64 4
#define LZ4_STREAMDECODESIZE (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))
typedef struct { unsigned long long table[LZ4_STREAMDECODESIZE_U64]; } LZ4_streamDecode_t;
/*
* LZ4_streamDecode_t
* information structure to track an LZ4 stream.
* init this structure content using LZ4_setStreamDecode or memset() before first use !
*
* In the context of a DLL (liblz4) please prefer usage of construction methods below.
* They are more future proof, in case of a change of LZ4_streamDecode_t size in the future.
* LZ4_createStreamDecode will allocate and initialize an LZ4_streamDecode_t structure
* LZ4_freeStreamDecode releases its memory.
*/
LZ4_streamDecode_t* LZ4_createStreamDecode(void);
int LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
/*
* LZ4_setStreamDecode
* Use this function to instruct where to find the dictionary.
* Setting a size of 0 is allowed (same effect as reset).
* Return : 1 if OK, 0 if error
*/
int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const char* dictionary, int dictSize);
/*
*_continue() :
These decoding functions allow decompression of multiple blocks in "streaming" mode.
Previously decoded blocks *must* remain available at the memory position where they were decoded (up to 64 KB)
In the case of a ring buffers, decoding buffer must be either :
- Exactly same size as encoding buffer, with same update rule (block boundaries at same positions)
In which case, the decoding & encoding ring buffer can have any size, including very small ones ( < 64 KB).
- Larger than encoding buffer, by a minimum of maxBlockSize more bytes.
maxBlockSize is implementation dependent. It's the maximum size you intend to compress into a single block.
In which case, encoding and decoding buffers do not need to be synchronized,
and encoding ring buffer can have any size, including small ones ( < 64 KB).
- _At least_ 64 KB + 8 bytes + maxBlockSize.
In which case, encoding and decoding buffers do not need to be synchronized,
and encoding ring buffer can have any size, including larger than decoding buffer.
Whenever these conditions are not possible, save the last 64KB of decoded data into a safe buffer,
and indicate where it is saved using LZ4_setStreamDecode()
*/
int LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int compressedSize, int maxDecompressedSize);
int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int originalSize);
/*
Advanced decoding functions :
*_usingDict() :
These decoding functions work the same as
a combination of LZ4_setStreamDecode() followed by LZ4_decompress_x_continue()
They are stand-alone. They don't need nor update an LZ4_streamDecode_t structure.
*/
int LZ4_decompress_safe_usingDict (const char* source, char* dest, int compressedSize, int maxDecompressedSize, const char* dictStart, int dictSize);
int LZ4_decompress_fast_usingDict (const char* source, char* dest, int originalSize, const char* dictStart, int dictSize);
/**************************************
* Obsolete Functions
**************************************/
/* Deprecate Warnings */
/* Should these warnings messages be a problem,
it is generally possible to disable them,
with -Wno-deprecated-declarations for gcc
or _CRT_SECURE_NO_WARNINGS in Visual for example.
You can also define LZ4_DEPRECATE_WARNING_DEFBLOCK. */
#ifndef LZ4_DEPRECATE_WARNING_DEFBLOCK
# define LZ4_DEPRECATE_WARNING_DEFBLOCK
# define LZ4_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
# if (LZ4_GCC_VERSION >= 405) || defined(__clang__)
# define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
# elif (LZ4_GCC_VERSION >= 301)
# define LZ4_DEPRECATED(message) __attribute__((deprecated))
# elif defined(_MSC_VER)
# define LZ4_DEPRECATED(message) __declspec(deprecated(message))
# else
# pragma message("WARNING: You need to implement LZ4_DEPRECATED for this compiler")
# define LZ4_DEPRECATED(message)
# endif
#endif /* LZ4_DEPRECATE_WARNING_DEFBLOCK */
/* Obsolete compression functions */
/* These functions are planned to start generate warnings by r131 approximately */
int LZ4_compress (const char* source, char* dest, int sourceSize);
int LZ4_compress_limitedOutput (const char* source, char* dest, int sourceSize, int maxOutputSize);
int LZ4_compress_withState (void* state, const char* source, char* dest, int inputSize);
int LZ4_compress_limitedOutput_withState (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
int LZ4_compress_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize);
int LZ4_compress_limitedOutput_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
/* Obsolete decompression functions */
/* These function names are completely deprecated and must no longer be used.
They are only provided here for compatibility with older programs.
- LZ4_uncompress is the same as LZ4_decompress_fast
- LZ4_uncompress_unknownOutputSize is the same as LZ4_decompress_safe
These function prototypes are now disabled; uncomment them only if you really need them.
It is highly recommended to stop using these prototypes and migrate to maintained ones */
/* int LZ4_uncompress (const char* source, char* dest, int outputSize); */
/* int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize); */
/* Obsolete streaming functions; use new streaming interface whenever possible */
LZ4_DEPRECATED("use LZ4_createStream() instead") void* LZ4_create (char* inputBuffer);
LZ4_DEPRECATED("use LZ4_createStream() instead") int LZ4_sizeofStreamState(void);
LZ4_DEPRECATED("use LZ4_resetStream() instead") int LZ4_resetStreamState(void* state, char* inputBuffer);
LZ4_DEPRECATED("use LZ4_saveDict() instead") char* LZ4_slideInputBuffer (void* state);
/* Obsolete streaming decoding functions */
LZ4_DEPRECATED("use LZ4_decompress_safe_usingDict() instead") int LZ4_decompress_safe_withPrefix64k (const char* src, char* dst, int compressedSize, int maxDstSize);
LZ4_DEPRECATED("use LZ4_decompress_fast_usingDict() instead") int LZ4_decompress_fast_withPrefix64k (const char* src, char* dst, int originalSize);
#if defined (__cplusplus)
}
#endif

38
thirdparty/etcpak/mmap.cpp vendored Normal file
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@ -0,0 +1,38 @@
#include "mmap.hpp"
#ifdef _WIN32
# include <io.h>
# include <windows.h>
void* mmap( void* addr, size_t length, int prot, int flags, int fd, off_t offset )
{
HANDLE hnd;
void* map = nullptr;
switch( prot )
{
case PROT_READ:
if( hnd = CreateFileMapping( HANDLE( _get_osfhandle( fd ) ), nullptr, PAGE_READONLY, 0, DWORD( length ), nullptr ) )
{
map = MapViewOfFile( hnd, FILE_MAP_READ, 0, 0, length );
CloseHandle( hnd );
}
break;
case PROT_WRITE:
if( hnd = CreateFileMapping( HANDLE( _get_osfhandle( fd ) ), nullptr, PAGE_READWRITE, 0, DWORD( length ), nullptr ) )
{
map = MapViewOfFile( hnd, FILE_MAP_WRITE, 0, 0, length );
CloseHandle( hnd );
}
break;
}
return map ? (char*)map + offset : (void*)-1;
}
int munmap( void* addr, size_t length )
{
return UnmapViewOfFile( addr ) != 0 ? 0 : -1;
}
#endif

19
thirdparty/etcpak/mmap.hpp vendored Normal file
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@ -0,0 +1,19 @@
#ifndef __MMAP_HPP__
#define __MMAP_HPP__
#ifndef _WIN32
# include <sys/mman.h>
#else
# include <string.h>
# include <sys/types.h>
# define PROT_READ 1
# define PROT_WRITE 2
# define MAP_SHARED 0
void* mmap( void* addr, size_t length, int prot, int flags, int fd, off_t offset );
int munmap( void* addr, size_t length );
#endif
#endif

13
thirdparty/etcpak/patches/libpng-unbundle.patch vendored Normal file
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@ -0,0 +1,13 @@
diff --git a/thirdparty/etcpak/Bitmap.cpp b/thirdparty/etcpak/Bitmap.cpp
index 6aa36f5caa..ef318318ac 100644
--- a/thirdparty/etcpak/Bitmap.cpp
+++ b/thirdparty/etcpak/Bitmap.cpp
@@ -3,7 +3,7 @@
#include <string.h>
#include <assert.h>
-#include "libpng/png.h"
+#include <png.h>
#include "lz4/lz4.h"
#include "Bitmap.hpp"

64
thirdparty/etcpak/patches/llvm-c++11-narrowing-errors.patch vendored Normal file
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@ -0,0 +1,64 @@
diff --git a/thirdparty/etcpak/BlockData.cpp b/thirdparty/etcpak/BlockData.cpp
index bd738085f3..395b55246b 100644
--- a/thirdparty/etcpak/BlockData.cpp
+++ b/thirdparty/etcpak/BlockData.cpp
@@ -334,10 +334,10 @@ static etcpak_force_inline void DecodeT( uint64_t block, uint32_t* dst, uint32_t
const auto c3b = clampu8( cb1 - table59T58H[codeword] );
const uint32_t col_tab[4] = {
- cr0 | ( cg0 << 8 ) | ( cb0 << 16 ) | 0xFF000000,
- c2r | ( c2g << 8 ) | ( c2b << 16 ) | 0xFF000000,
- cr1 | ( cg1 << 8 ) | ( cb1 << 16 ) | 0xFF000000,
- c3r | ( c3g << 8 ) | ( c3b << 16 ) | 0xFF000000
+ uint32_t(cr0 | ( cg0 << 8 ) | ( cb0 << 16 ) | 0xFF000000),
+ uint32_t(c2r | ( c2g << 8 ) | ( c2b << 16 ) | 0xFF000000),
+ uint32_t(cr1 | ( cg1 << 8 ) | ( cb1 << 16 ) | 0xFF000000),
+ uint32_t(c3r | ( c3g << 8 ) | ( c3b << 16 ) | 0xFF000000)
};
const uint32_t indexes = ( block >> 32 ) & 0xFFFFFFFF;
@@ -389,10 +389,10 @@ static etcpak_force_inline void DecodeTAlpha( uint64_t block, uint64_t alpha, ui
const auto c3b = clampu8( cb1 - table59T58H[codeword] );
const uint32_t col_tab[4] = {
- cr0 | ( cg0 << 8 ) | ( cb0 << 16 ),
- c2r | ( c2g << 8 ) | ( c2b << 16 ),
- cr1 | ( cg1 << 8 ) | ( cb1 << 16 ),
- c3r | ( c3g << 8 ) | ( c3b << 16 )
+ uint32_t(cr0 | ( cg0 << 8 ) | ( cb0 << 16 )),
+ uint32_t(c2r | ( c2g << 8 ) | ( c2b << 16 )),
+ uint32_t(cr1 | ( cg1 << 8 ) | ( cb1 << 16 )),
+ uint32_t(c3r | ( c3g << 8 ) | ( c3b << 16 ))
};
const uint32_t indexes = ( block >> 32 ) & 0xFFFFFFFF;
@@ -436,10 +436,10 @@ static etcpak_force_inline void DecodeH( uint64_t block, uint32_t* dst, uint32_t
const auto codeword = codeword_hi | codeword_lo;
const uint32_t col_tab[] = {
- clampu8( r0 + table59T58H[codeword] ) | ( clampu8( g0 + table59T58H[codeword] ) << 8 ) | ( clampu8( b0 + table59T58H[codeword] ) << 16 ),
- clampu8( r0 - table59T58H[codeword] ) | ( clampu8( g0 - table59T58H[codeword] ) << 8 ) | ( clampu8( b0 - table59T58H[codeword] ) << 16 ),
- clampu8( r1 + table59T58H[codeword] ) | ( clampu8( g1 + table59T58H[codeword] ) << 8 ) | ( clampu8( b1 + table59T58H[codeword] ) << 16 ),
- clampu8( r1 - table59T58H[codeword] ) | ( clampu8( g1 - table59T58H[codeword] ) << 8 ) | ( clampu8( b1 - table59T58H[codeword] ) << 16 )
+ uint32_t(clampu8( r0 + table59T58H[codeword] ) | ( clampu8( g0 + table59T58H[codeword] ) << 8 ) | ( clampu8( b0 + table59T58H[codeword] ) << 16 )),
+ uint32_t(clampu8( r0 - table59T58H[codeword] ) | ( clampu8( g0 - table59T58H[codeword] ) << 8 ) | ( clampu8( b0 - table59T58H[codeword] ) << 16 )),
+ uint32_t(clampu8( r1 + table59T58H[codeword] ) | ( clampu8( g1 + table59T58H[codeword] ) << 8 ) | ( clampu8( b1 + table59T58H[codeword] ) << 16 )),
+ uint32_t(clampu8( r1 - table59T58H[codeword] ) | ( clampu8( g1 - table59T58H[codeword] ) << 8 ) | ( clampu8( b1 - table59T58H[codeword] ) << 16 ))
};
for( uint8_t j = 0; j < 4; j++ )
@@ -483,10 +483,10 @@ static etcpak_force_inline void DecodeHAlpha( uint64_t block, uint64_t alpha, ui
const auto tbl = g_alpha[(alpha >> 48) & 0xF];
const uint32_t col_tab[] = {
- clampu8( r0 + table59T58H[codeword] ) | ( clampu8( g0 + table59T58H[codeword] ) << 8 ) | ( clampu8( b0 + table59T58H[codeword] ) << 16 ),
- clampu8( r0 - table59T58H[codeword] ) | ( clampu8( g0 - table59T58H[codeword] ) << 8 ) | ( clampu8( b0 - table59T58H[codeword] ) << 16 ),
- clampu8( r1 + table59T58H[codeword] ) | ( clampu8( g1 + table59T58H[codeword] ) << 8 ) | ( clampu8( b1 + table59T58H[codeword] ) << 16 ),
- clampu8( r1 - table59T58H[codeword] ) | ( clampu8( g1 - table59T58H[codeword] ) << 8 ) | ( clampu8( b1 - table59T58H[codeword] ) << 16 )
+ uint32_t(clampu8( r0 + table59T58H[codeword] ) | ( clampu8( g0 + table59T58H[codeword] ) << 8 ) | ( clampu8( b0 + table59T58H[codeword] ) << 16 )),
+ uint32_t(clampu8( r0 - table59T58H[codeword] ) | ( clampu8( g0 - table59T58H[codeword] ) << 8 ) | ( clampu8( b0 - table59T58H[codeword] ) << 16 )),
+ uint32_t(clampu8( r1 + table59T58H[codeword] ) | ( clampu8( g1 + table59T58H[codeword] ) << 8 ) | ( clampu8( b1 + table59T58H[codeword] ) << 16 )),
+ uint32_t(clampu8( r1 - table59T58H[codeword] ) | ( clampu8( g1 - table59T58H[codeword] ) << 8 ) | ( clampu8( b1 - table59T58H[codeword] ) << 16 ))
};
for( uint8_t j = 0; j < 4; j++ )

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