1426cd3b3a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see". Backported from #70885.
263 lines
9.1 KiB
C++
263 lines
9.1 KiB
C++
/**************************************************************************/
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/* image_compress_etc.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "image_compress_etc.h"
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#include "core/image.h"
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#include "core/os/os.h"
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#include "core/print_string.h"
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#include <Etc.h>
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#include <EtcFilter.h>
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static Image::Format _get_etc2_mode(Image::DetectChannels format) {
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switch (format) {
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case Image::DETECTED_R:
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return Image::FORMAT_ETC2_R11;
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case Image::DETECTED_RG:
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return Image::FORMAT_ETC2_RG11;
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case Image::DETECTED_RGB:
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return Image::FORMAT_ETC2_RGB8;
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case Image::DETECTED_RGBA:
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return Image::FORMAT_ETC2_RGBA8;
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// TODO: would be nice if we could use FORMAT_ETC2_RGB8A1 for FORMAT_RGBA5551
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default:
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// TODO: Kept for compatibility, but should be investigated whether it's correct or if it should error out
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return Image::FORMAT_ETC2_RGBA8;
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}
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}
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static Etc::Image::Format _image_format_to_etc2comp_format(Image::Format format) {
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switch (format) {
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case Image::FORMAT_ETC:
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return Etc::Image::Format::ETC1;
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case Image::FORMAT_ETC2_R11:
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return Etc::Image::Format::R11;
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case Image::FORMAT_ETC2_R11S:
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return Etc::Image::Format::SIGNED_R11;
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case Image::FORMAT_ETC2_RG11:
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return Etc::Image::Format::RG11;
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case Image::FORMAT_ETC2_RG11S:
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return Etc::Image::Format::SIGNED_RG11;
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case Image::FORMAT_ETC2_RGB8:
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return Etc::Image::Format::RGB8;
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case Image::FORMAT_ETC2_RGBA8:
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return Etc::Image::Format::RGBA8;
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case Image::FORMAT_ETC2_RGB8A1:
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return Etc::Image::Format::RGB8A1;
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default:
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ERR_FAIL_V(Etc::Image::Format::UNKNOWN);
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}
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}
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static void _compress_etc(Image *p_img, float p_lossy_quality, bool force_etc1_format, Image::CompressSource p_source) {
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Image::Format img_format = p_img->get_format();
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Image::DetectChannels detected_channels = p_img->get_detected_channels();
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if (p_source == Image::COMPRESS_SOURCE_LAYERED) {
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//keep what comes in
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switch (p_img->get_format()) {
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case Image::FORMAT_L8: {
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detected_channels = Image::DETECTED_L;
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} break;
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case Image::FORMAT_LA8: {
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detected_channels = Image::DETECTED_LA;
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} break;
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case Image::FORMAT_R8: {
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detected_channels = Image::DETECTED_R;
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} break;
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case Image::FORMAT_RG8: {
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detected_channels = Image::DETECTED_RG;
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} break;
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case Image::FORMAT_RGB8: {
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detected_channels = Image::DETECTED_RGB;
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} break;
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case Image::FORMAT_RGBA8:
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case Image::FORMAT_RGBA4444:
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case Image::FORMAT_RGBA5551: {
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detected_channels = Image::DETECTED_RGBA;
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} break;
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default: {
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}
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}
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}
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if (p_source == Image::COMPRESS_SOURCE_SRGB && (detected_channels == Image::DETECTED_R || detected_channels == Image::DETECTED_RG)) {
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//R and RG do not support SRGB
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detected_channels = Image::DETECTED_RGB;
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}
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if (p_source == Image::COMPRESS_SOURCE_NORMAL) {
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//use RG channels only for normal
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detected_channels = Image::DETECTED_RG;
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}
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if (img_format >= Image::FORMAT_DXT1) {
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return; //do not compress, already compressed
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}
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if (img_format > Image::FORMAT_RGBA8) {
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// TODO: we should be able to handle FORMAT_RGBA4444 and FORMAT_RGBA5551 eventually
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return;
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}
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if (force_etc1_format) {
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// If VRAM compression is using ETC, but image has alpha, convert to RGBA4444 or LA8
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// This saves space while maintaining the alpha channel
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if (detected_channels == Image::DETECTED_RGBA) {
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if (p_img->has_mipmaps()) {
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// Image doesn't support mipmaps with RGBA4444 textures
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p_img->clear_mipmaps();
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}
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p_img->convert(Image::FORMAT_RGBA4444);
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return;
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} else if (detected_channels == Image::DETECTED_LA) {
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p_img->convert(Image::FORMAT_LA8);
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return;
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}
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}
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uint32_t imgw = p_img->get_width(), imgh = p_img->get_height();
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Image::Format etc_format = force_etc1_format ? Image::FORMAT_ETC : _get_etc2_mode(detected_channels);
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Ref<Image> img = p_img->duplicate();
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if (img->get_format() != Image::FORMAT_RGBA8) {
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img->convert(Image::FORMAT_RGBA8); //still uses RGBA to convert
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}
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if (img->has_mipmaps()) {
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if (next_power_of_2(imgw) != imgw || next_power_of_2(imgh) != imgh) {
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img->resize_to_po2();
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imgw = img->get_width();
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imgh = img->get_height();
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}
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} else {
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if (imgw % 4 != 0 || imgh % 4 != 0) {
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if (imgw % 4) {
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imgw += 4 - imgw % 4;
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}
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if (imgh % 4) {
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imgh += 4 - imgh % 4;
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}
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img->resize(imgw, imgh);
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}
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}
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PoolVector<uint8_t>::Read r = img->get_data().read();
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ERR_FAIL_COND(!r.ptr());
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unsigned int target_size = Image::get_image_data_size(imgw, imgh, etc_format, p_img->has_mipmaps());
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int mmc = 1 + (p_img->has_mipmaps() ? Image::get_image_required_mipmaps(imgw, imgh, etc_format) : 0);
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PoolVector<uint8_t> dst_data;
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dst_data.resize(target_size);
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PoolVector<uint8_t>::Write w = dst_data.write();
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// prepare parameters to be passed to etc2comp
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int num_cpus = OS::get_singleton()->get_processor_count();
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int encoding_time = 0;
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float effort = 0.0; //default, reasonable time
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if (p_lossy_quality > 0.95) {
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effort = 80;
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} else if (p_lossy_quality > 0.85) {
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effort = 60;
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} else if (p_lossy_quality > 0.75) {
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effort = 40;
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}
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Etc::ErrorMetric error_metric = Etc::ErrorMetric::RGBX; // NOTE: we can experiment with other error metrics
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Etc::Image::Format etc2comp_etc_format = _image_format_to_etc2comp_format(etc_format);
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int wofs = 0;
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print_verbose("ETC: Begin encoding, format: " + Image::get_format_name(etc_format));
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uint64_t t = OS::get_singleton()->get_ticks_msec();
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for (int i = 0; i < mmc; i++) {
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// convert source image to internal etc2comp format (which is equivalent to Image::FORMAT_RGBAF)
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// NOTE: We can alternatively add a case to Image::convert to handle Image::FORMAT_RGBAF conversion.
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int mipmap_ofs = 0, mipmap_size = 0, mipmap_w = 0, mipmap_h = 0;
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img->get_mipmap_offset_size_and_dimensions(i, mipmap_ofs, mipmap_size, mipmap_w, mipmap_h);
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const uint8_t *src = &r[mipmap_ofs];
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Etc::ColorFloatRGBA *src_rgba_f = new Etc::ColorFloatRGBA[mipmap_w * mipmap_h];
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for (int j = 0; j < mipmap_w * mipmap_h; j++) {
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int si = j * 4; // RGBA8
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src_rgba_f[j] = Etc::ColorFloatRGBA::ConvertFromRGBA8(src[si], src[si + 1], src[si + 2], src[si + 3]);
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}
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unsigned char *etc_data = nullptr;
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unsigned int etc_data_len = 0;
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unsigned int extended_width = 0, extended_height = 0;
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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);
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CRASH_COND(wofs + etc_data_len > target_size);
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memcpy(&w[wofs], etc_data, etc_data_len);
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wofs += etc_data_len;
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delete[] etc_data;
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delete[] src_rgba_f;
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}
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print_verbose("ETC: Time encoding: " + rtos(OS::get_singleton()->get_ticks_msec() - t));
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p_img->create(imgw, imgh, p_img->has_mipmaps(), etc_format, dst_data);
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}
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static void _compress_etc1(Image *p_img, float p_lossy_quality) {
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_compress_etc(p_img, p_lossy_quality, true, Image::COMPRESS_SOURCE_GENERIC);
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}
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static void _compress_etc2(Image *p_img, float p_lossy_quality, Image::CompressSource p_source) {
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_compress_etc(p_img, p_lossy_quality, false, p_source);
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}
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void _register_etc_compress_func() {
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Image::_image_compress_etc1_func = _compress_etc1;
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Image::_image_compress_etc2_func = _compress_etc2;
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}
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