// 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