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https://github.com/bkaradzic/bimg.git
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Moved image code from bgfx into bimg library.
This commit is contained in:
Branimir Karadžić
275
src/image_encode.cpp
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275
src/image_encode.cpp
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/*
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* Copyright 2011-2017 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 "bimg_p.h"
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#include <libsquish/squish.h>
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#include <etc1/etc1.h>
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#include <etc2/ProcessRGB.hpp>
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#include <nvtt/nvtt.h>
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#include <pvrtc/PvrTcEncoder.h>
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#include <edtaa3/edtaa3func.h>
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namespace bimg
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{
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bool imageEncodeFromRgba8(void* _dst, const void* _src, uint32_t _width, uint32_t _height, uint8_t _format)
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{
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TextureFormat::Enum format = TextureFormat::Enum(_format);
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switch (format)
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{
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case TextureFormat::BC1:
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case TextureFormat::BC2:
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case TextureFormat::BC3:
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case TextureFormat::BC4:
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case TextureFormat::BC5:
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squish::CompressImage( (const uint8_t*)_src, _width, _height, _dst
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, format == TextureFormat::BC2 ? squish::kDxt3
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: format == TextureFormat::BC3 ? squish::kDxt5
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: format == TextureFormat::BC4 ? squish::kBc4
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: format == TextureFormat::BC5 ? squish::kBc5
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: squish::kDxt1
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);
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return true;
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case TextureFormat::BC6H:
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nvtt::compressBC6H( (const uint8_t*)_src, _width, _height, 4, _dst);
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return true;
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case TextureFormat::BC7:
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nvtt::compressBC7( (const uint8_t*)_src, _width, _height, 4, _dst);
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return true;
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case TextureFormat::ETC1:
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etc1_encode_image( (const uint8_t*)_src, _width, _height, 4, _width*4, (uint8_t*)_dst);
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return true;
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case TextureFormat::ETC2:
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{
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const uint32_t blockWidth = (_width +3)/4;
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const uint32_t blockHeight = (_height+3)/4;
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const uint32_t pitch = _width*4;
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const uint8_t* src = (const uint8_t*)_src;
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uint64_t* dst = (uint64_t*)_dst;
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for (uint32_t yy = 0; yy < blockHeight; ++yy)
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{
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for (uint32_t xx = 0; xx < blockWidth; ++xx)
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{
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uint8_t block[4*4*4];
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const uint8_t* ptr = &src[(yy*pitch+xx*4)*4];
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for (uint32_t ii = 0; ii < 16; ++ii)
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{ // BGRx
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bx::memCopy(&block[ii*4], &ptr[(ii%4)*pitch + (ii&~3)], 4);
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bx::xchg(block[ii*4+0], block[ii*4+2]);
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}
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*dst++ = ProcessRGB_ETC2(block);
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}
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}
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}
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return true;
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case TextureFormat::PTC14:
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{
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using namespace Javelin;
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RgbaBitmap bmp;
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bmp.width = _width;
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bmp.height = _height;
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bmp.data = (uint8_t*)const_cast<void*>(_src);
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PvrTcEncoder::EncodeRgb4Bpp(_dst, bmp);
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bmp.data = NULL;
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}
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return true;
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case TextureFormat::PTC14A:
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{
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using namespace Javelin;
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RgbaBitmap bmp;
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bmp.width = _width;
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bmp.height = _height;
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bmp.data = (uint8_t*)const_cast<void*>(_src);
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PvrTcEncoder::EncodeRgba4Bpp(_dst, bmp);
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bmp.data = NULL;
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}
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return true;
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case TextureFormat::BGRA8:
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imageSwizzleBgra8(_dst, _width, _height, _width*4, _src);
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return true;
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case TextureFormat::RGBA8:
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bx::memCopy(_dst, _src, _width*_height*4);
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return true;
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default:
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break;
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}
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return imageConvert(_dst, format, _src, TextureFormat::RGBA8, _width, _height);
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}
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bool imageEncodeFromRgba32f(bx::AllocatorI* _allocator, void* _dst, const void* _src, uint32_t _width, uint32_t _height, uint8_t _format)
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{
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TextureFormat::Enum format = TextureFormat::Enum(_format);
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const uint8_t* src = (const uint8_t*)_src;
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switch (format)
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{
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case TextureFormat::RGBA8:
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{
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uint8_t* dst = (uint8_t*)_dst;
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for (uint32_t yy = 0; yy < _height; ++yy)
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{
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for (uint32_t xx = 0; xx < _width; ++xx)
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{
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const uint32_t offset = yy*_width + xx;
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const float* input = (const float*)&src[offset * 16];
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uint8_t* output = &dst[offset * 4];
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output[0] = uint8_t(input[0]*255.0f + 0.5f);
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output[1] = uint8_t(input[1]*255.0f + 0.5f);
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output[2] = uint8_t(input[2]*255.0f + 0.5f);
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output[3] = uint8_t(input[3]*255.0f + 0.5f);
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}
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}
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}
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return true;
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case TextureFormat::BC5:
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{
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uint8_t* temp = (uint8_t*)BX_ALLOC(_allocator, _width*_height*4);
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for (uint32_t yy = 0; yy < _height; ++yy)
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{
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for (uint32_t xx = 0; xx < _width; ++xx)
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{
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const uint32_t offset = yy*_width + xx;
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const float* input = (const float*)&src[offset * 16];
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uint8_t* output = &temp[offset * 4];
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output[0] = uint8_t(input[0]*255.0f + 0.5f);
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output[1] = uint8_t(input[1]*255.0f + 0.5f);
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output[2] = uint8_t(input[2]*255.0f + 0.5f);
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output[3] = uint8_t(input[3]*255.0f + 0.5f);
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}
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}
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imageEncodeFromRgba8(_dst, temp, _width, _height, _format);
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BX_FREE(_allocator, temp);
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}
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return true;
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default:
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break;
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}
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return imageConvert(_dst, format, _src, TextureFormat::RGBA32F, _width, _height);
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}
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void imageRgba32f11to01(void* _dst, uint32_t _width, uint32_t _height, uint32_t _pitch, const void* _src)
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{
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const uint8_t* src = (const uint8_t*)_src;
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uint8_t* dst = (uint8_t*)_dst;
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for (uint32_t yy = 0; yy < _height; ++yy)
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{
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for (uint32_t xx = 0; xx < _width; ++xx)
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{
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const uint32_t offset = yy*_pitch + xx * 16;
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const float* input = (const float*)&src[offset];
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float* output = (float*)&dst[offset];
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output[0] = input[0]*0.5f + 0.5f;
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output[1] = input[1]*0.5f + 0.5f;
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output[2] = input[2]*0.5f + 0.5f;
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output[3] = input[3]*0.5f + 0.5f;
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}
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}
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}
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static void edtaa3(bx::AllocatorI* _allocator, double* _dst, uint32_t _width, uint32_t _height, double* _src)
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{
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const uint32_t numPixels = _width*_height;
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short* xdist = (short *)BX_ALLOC(_allocator, numPixels*sizeof(short) );
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short* ydist = (short *)BX_ALLOC(_allocator, numPixels*sizeof(short) );
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double* gx = (double*)BX_ALLOC(_allocator, numPixels*sizeof(double) );
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double* gy = (double*)BX_ALLOC(_allocator, numPixels*sizeof(double) );
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::computegradient(_src, _width, _height, gx, gy);
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::edtaa3(_src, gx, gy, _width, _height, xdist, ydist, _dst);
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for (uint32_t ii = 0; ii < numPixels; ++ii)
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{
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if (_dst[ii] < 0.0)
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{
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_dst[ii] = 0.0;
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}
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}
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BX_FREE(_allocator, xdist);
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BX_FREE(_allocator, ydist);
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BX_FREE(_allocator, gx);
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BX_FREE(_allocator, gy);
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}
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inline double min(double _a, double _b)
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{
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return _a > _b ? _b : _a;
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}
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inline double max(double _a, double _b)
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{
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return _a > _b ? _a : _b;
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}
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inline double clamp(double _val, double _min, double _max)
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{
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return max(min(_val, _max), _min);
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}
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void imageMakeDist(bx::AllocatorI* _allocator, void* _dst, uint32_t _width, uint32_t _height, uint32_t _pitch, float _edge, const void* _src)
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{
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const uint32_t numPixels = _width*_height;
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double* imgIn = (double*)BX_ALLOC(_allocator, numPixels*sizeof(double) );
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double* outside = (double*)BX_ALLOC(_allocator, numPixels*sizeof(double) );
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double* inside = (double*)BX_ALLOC(_allocator, numPixels*sizeof(double) );
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for (uint32_t yy = 0; yy < _height; ++yy)
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{
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const uint8_t* src = (const uint8_t*)_src + yy*_pitch;
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double* dst = &imgIn[yy*_width];
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for (uint32_t xx = 0; xx < _width; ++xx)
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{
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dst[xx] = double(src[xx])/255.0;
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}
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}
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edtaa3(_allocator, outside, _width, _height, imgIn);
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for (uint32_t ii = 0; ii < numPixels; ++ii)
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{
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imgIn[ii] = 1.0 - imgIn[ii];
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}
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edtaa3(_allocator, inside, _width, _height, imgIn);
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BX_FREE(_allocator, imgIn);
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uint8_t* dst = (uint8_t*)_dst;
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double edgeOffset = _edge*0.5;
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double invEdge = 1.0/_edge;
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for (uint32_t ii = 0; ii < numPixels; ++ii)
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{
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double dist = clamp( ( (outside[ii] - inside[ii])+edgeOffset) * invEdge, 0.0, 1.0);
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dst[ii] = 255-uint8_t(dist * 255.0);
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}
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BX_FREE(_allocator, inside);
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BX_FREE(_allocator, outside);
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}
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} // namespace bimg
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