155 lines
5.5 KiB
C++
155 lines
5.5 KiB
C++
// basisu_gpu_texture.h
|
|
// Copyright (C) 2019-2021 Binomial LLC. All Rights Reserved.
|
|
//
|
|
// 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 "../transcoder/basisu.h"
|
|
#include "basisu_etc.h"
|
|
|
|
namespace basisu
|
|
{
|
|
// GPU texture "image"
|
|
class gpu_image
|
|
{
|
|
public:
|
|
enum { cMaxBlockSize = 12 };
|
|
|
|
gpu_image()
|
|
{
|
|
clear();
|
|
}
|
|
|
|
gpu_image(texture_format fmt, uint32_t width, uint32_t height)
|
|
{
|
|
init(fmt, width, height);
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
m_fmt = texture_format::cInvalidTextureFormat;
|
|
m_width = 0;
|
|
m_height = 0;
|
|
m_block_width = 0;
|
|
m_block_height = 0;
|
|
m_blocks_x = 0;
|
|
m_blocks_y = 0;
|
|
m_qwords_per_block = 0;
|
|
m_blocks.clear();
|
|
}
|
|
|
|
inline texture_format get_format() const { return m_fmt; }
|
|
|
|
// Width/height in pixels
|
|
inline uint32_t get_pixel_width() const { return m_width; }
|
|
inline uint32_t get_pixel_height() const { return m_height; }
|
|
|
|
// Width/height in blocks, row pitch is assumed to be m_blocks_x.
|
|
inline uint32_t get_blocks_x() const { return m_blocks_x; }
|
|
inline uint32_t get_blocks_y() const { return m_blocks_y; }
|
|
|
|
// Size of each block in pixels
|
|
inline uint32_t get_block_width() const { return m_block_width; }
|
|
inline uint32_t get_block_height() const { return m_block_height; }
|
|
|
|
inline uint32_t get_qwords_per_block() const { return m_qwords_per_block; }
|
|
inline uint32_t get_total_blocks() const { return m_blocks_x * m_blocks_y; }
|
|
inline uint32_t get_bytes_per_block() const { return get_qwords_per_block() * sizeof(uint64_t); }
|
|
inline uint32_t get_row_pitch_in_bytes() const { return get_bytes_per_block() * get_blocks_x(); }
|
|
|
|
inline const uint64_vec &get_blocks() const { return m_blocks; }
|
|
|
|
inline const uint64_t *get_ptr() const { return &m_blocks[0]; }
|
|
inline uint64_t *get_ptr() { return &m_blocks[0]; }
|
|
|
|
inline uint32_t get_size_in_bytes() const { return get_total_blocks() * get_qwords_per_block() * sizeof(uint64_t); }
|
|
|
|
inline const void *get_block_ptr(uint32_t block_x, uint32_t block_y, uint32_t element_index = 0) const
|
|
{
|
|
assert(block_x < m_blocks_x && block_y < m_blocks_y);
|
|
return &m_blocks[(block_x + block_y * m_blocks_x) * m_qwords_per_block + element_index];
|
|
}
|
|
|
|
inline void *get_block_ptr(uint32_t block_x, uint32_t block_y, uint32_t element_index = 0)
|
|
{
|
|
assert(block_x < m_blocks_x && block_y < m_blocks_y && element_index < m_qwords_per_block);
|
|
return &m_blocks[(block_x + block_y * m_blocks_x) * m_qwords_per_block + element_index];
|
|
}
|
|
|
|
void init(texture_format fmt, uint32_t width, uint32_t height)
|
|
{
|
|
m_fmt = fmt;
|
|
m_width = width;
|
|
m_height = height;
|
|
m_block_width = basisu::get_block_width(m_fmt);
|
|
m_block_height = basisu::get_block_height(m_fmt);
|
|
m_blocks_x = (m_width + m_block_width - 1) / m_block_width;
|
|
m_blocks_y = (m_height + m_block_height - 1) / m_block_height;
|
|
m_qwords_per_block = basisu::get_qwords_per_block(m_fmt);
|
|
|
|
m_blocks.resize(0);
|
|
m_blocks.resize(m_blocks_x * m_blocks_y * m_qwords_per_block);
|
|
}
|
|
|
|
bool unpack(image& img) const;
|
|
|
|
void override_dimensions(uint32_t w, uint32_t h)
|
|
{
|
|
m_width = w;
|
|
m_height = h;
|
|
}
|
|
|
|
private:
|
|
texture_format m_fmt;
|
|
uint32_t m_width, m_height, m_blocks_x, m_blocks_y, m_block_width, m_block_height, m_qwords_per_block;
|
|
uint64_vec m_blocks;
|
|
};
|
|
|
|
typedef basisu::vector<gpu_image> gpu_image_vec;
|
|
|
|
// KTX file writing
|
|
|
|
bool create_ktx_texture_file(uint8_vec &ktx_data, const basisu::vector<gpu_image_vec>& gpu_images, bool cubemap_flag);
|
|
|
|
bool write_compressed_texture_file(const char *pFilename, const basisu::vector<gpu_image_vec>& g, bool cubemap_flag);
|
|
|
|
inline bool write_compressed_texture_file(const char *pFilename, const gpu_image_vec &g)
|
|
{
|
|
basisu::vector<gpu_image_vec> a;
|
|
a.push_back(g);
|
|
return write_compressed_texture_file(pFilename, a, false);
|
|
}
|
|
|
|
bool write_compressed_texture_file(const char *pFilename, const gpu_image &g);
|
|
|
|
bool write_3dfx_out_file(const char* pFilename, const gpu_image& gi);
|
|
|
|
// GPU texture block unpacking
|
|
void unpack_etc2_eac(const void *pBlock_bits, color_rgba *pPixels);
|
|
bool unpack_bc1(const void *pBlock_bits, color_rgba *pPixels, bool set_alpha);
|
|
void unpack_bc4(const void *pBlock_bits, uint8_t *pPixels, uint32_t stride);
|
|
bool unpack_bc3(const void *pBlock_bits, color_rgba *pPixels);
|
|
void unpack_bc5(const void *pBlock_bits, color_rgba *pPixels);
|
|
bool unpack_bc7_mode6(const void *pBlock_bits, color_rgba *pPixels);
|
|
bool unpack_bc7(const void* pBlock_bits, color_rgba* pPixels);
|
|
void unpack_atc(const void* pBlock_bits, color_rgba* pPixels);
|
|
bool unpack_fxt1(const void* p, color_rgba* pPixels);
|
|
bool unpack_pvrtc2(const void* p, color_rgba* pPixels);
|
|
void unpack_etc2_eac_r(const void *p, color_rgba* pPixels, uint32_t c);
|
|
void unpack_etc2_eac_rg(const void* p, color_rgba* pPixels);
|
|
|
|
// unpack_block() is primarily intended to unpack texture data created by the transcoder.
|
|
// For some texture formats (like ETC2 RGB, PVRTC2, FXT1) it's not a complete implementation.
|
|
bool unpack_block(texture_format fmt, const void *pBlock, color_rgba *pPixels);
|
|
|
|
} // namespace basisu
|