| // basisu_gpu_texture.h |
| // Copyright (C) 2019-2020 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 std::vector<gpu_image> gpu_image_vec; |
| |
| // KTX file writing |
| |
| bool create_ktx_texture_file(uint8_vec &ktx_data, const std::vector<gpu_image_vec>& gpu_images, bool cubemap_flag); |
| |
| bool write_compressed_texture_file(const char *pFilename, const std::vector<gpu_image_vec>& g, bool cubemap_flag); |
| |
| inline bool write_compressed_texture_file(const char *pFilename, const gpu_image_vec &g) |
| { |
| std::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 |