mirror of
https://github.com/scratchfoundation/bgfx.git
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95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/*
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* Copyright 2011-2016 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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#include "nvtt.h"
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#include <string.h>
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#include <bx/uint32_t.h>
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#include "bc6h/zoh.h"
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#include "bc7/avpcl.h"
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#include "nvmath/vector.inl"
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NVCORE_API int nvAbort(const char *, const char *, int , const char *, const char *, ...)
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{
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abort();
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return 0;
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}
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namespace nvtt
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{
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using namespace nv;
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void compressBC6H(const void* _input, uint32_t _width, uint32_t _height, uint32_t _stride, void* _output)
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{
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const uint8_t* src = (const uint8_t*)_input;
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char* dst = (char*)_output;
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for (uint32_t yy = 0; yy < _height; yy += 4)
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{
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for (uint32_t xx = 0; xx < _width; xx += 4)
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{
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const Vector4* rgba = (const Vector4*)&src[yy*_stride + xx*sizeof(float)*4];
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ZOH::Utils::FORMAT = ZOH::UNSIGNED_F16;
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ZOH::Tile zohTile(4, 4);
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memset(zohTile.data, 0, sizeof(zohTile.data) );
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memset(zohTile.importance_map, 0, sizeof(zohTile.importance_map) );
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for (uint32_t blockY = 0; blockY < 4; ++blockY)
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{
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for (uint32_t blockX = 0; blockX < 4; ++blockX)
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{
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Vector4 color = rgba[blockY*4 + blockX];
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uint16 rHalf = bx::halfFromFloat(color.x);
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uint16 gHalf = bx::halfFromFloat(color.y);
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uint16 bHalf = bx::halfFromFloat(color.z);
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zohTile.data[blockY][blockX].x = ZOH::Tile::half2float(rHalf);
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zohTile.data[blockY][blockX].y = ZOH::Tile::half2float(gHalf);
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zohTile.data[blockY][blockX].z = ZOH::Tile::half2float(bHalf);
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zohTile.importance_map[blockY][blockX] = 1.0f;
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}
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}
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ZOH::compress(zohTile, &dst[( (yy*_width) + xx)/4 * 16]);
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}
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}
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}
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void compressBC7(const void* _input, uint32_t _width, uint32_t _height, uint32_t _stride, void* _output)
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{
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const uint8_t* src = (const uint8_t*)_input;
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char* dst = (char*)_output;
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for (uint32_t yy = 0; yy < _height; yy += 4)
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{
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for (uint32_t xx = 0; xx < _width; xx += 4)
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{
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const Vector4* rgba = (const Vector4*)&src[yy*_stride + xx*sizeof(float)*4];
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AVPCL::mode_rgb = false;
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AVPCL::flag_premult = false;
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AVPCL::flag_nonuniform = false;
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AVPCL::flag_nonuniform_ati = false;
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AVPCL::Tile avpclTile(4, 4);
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memset(avpclTile.data, 0, sizeof(avpclTile.data) );
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for (uint32_t blockY = 0; blockY < 4; ++blockY)
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{
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for (uint32_t blockX = 0; blockX < 4; ++blockX)
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{
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Vector4 color = rgba[blockY*4 + blockX];
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avpclTile.data[blockY][blockX] = color * 255.0f;
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avpclTile.importance_map[blockY][blockX] = 1.0f;
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}
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}
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AVPCL::compress(avpclTile, &dst[( (yy*_width) + xx)/4 * 16]);
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}
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}
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}
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} //namespace nvtt
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