From f2e065dee10fb110e9d51175ee6381333319ef56 Mon Sep 17 00:00:00 2001 From: Egor Yusov Date: Tue, 20 Oct 2015 21:05:29 -0700 Subject: Release v1.0.0 --- TextureLoader/src/TextureLoader.cpp | 248 ++++++++++++++++++++++++++++++++++++ 1 file changed, 248 insertions(+) create mode 100644 TextureLoader/src/TextureLoader.cpp (limited to 'TextureLoader/src/TextureLoader.cpp') diff --git a/TextureLoader/src/TextureLoader.cpp b/TextureLoader/src/TextureLoader.cpp new file mode 100644 index 0000000..63134a4 --- /dev/null +++ b/TextureLoader/src/TextureLoader.cpp @@ -0,0 +1,248 @@ +/* Copyright 2015 Egor Yusov + * + * 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 + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS. + * + * In no event and under no legal theory, whether in tort (including negligence), + * contract, or otherwise, unless required by applicable law (such as deliberate + * and grossly negligent acts) or agreed to in writing, shall any Contributor be + * liable for any damages, including any direct, indirect, special, incidental, + * or consequential damages of any character arising as a result of this License or + * out of the use or inability to use the software (including but not limited to damages + * for loss of goodwill, work stoppage, computer failure or malfunction, or any and + * all other commercial damages or losses), even if such Contributor has been advised + * of the possibility of such damages. + */ + +#include "pch.h" +#include "TextureLoader.h" +#include "GraphicsUtilities.h" +#include +#include +#include "DDSLoader.h" + +using namespace Diligent; + +namespace Diligent +{ + static const float a = 0.055f; + + // https://en.wikipedia.org/wiki/SRGB + float SRGBToLinear(float SRGB) + { + if( SRGB < 0.04045f ) + return SRGB / 12.92f; + else + return powf( (SRGB + a) / (1 + a), 2.4f ); + } + + float LinearToSRGB( float c ) + { + if( c < 0.0031308f ) + return 12.92f * c; + else + return (1+a) * pow(c, 1.f/2.4f) - a; + } + + template + ChannelType SRGBAverage(ChannelType c0, ChannelType c1, ChannelType c2, ChannelType c3) + { + const float NormVal = static_cast(std::numeric_limits::max()); + float fc0 = static_cast(c0) / NormVal; + float fc1 = static_cast(c1) / NormVal; + float fc2 = static_cast(c2) / NormVal; + float fc3 = static_cast(c3) / NormVal; + + float fLinearAverage = (SRGBToLinear( fc0 ) + SRGBToLinear( fc1 ) + SRGBToLinear( fc2 ) + SRGBToLinear( fc3 )) / 4.f; + float fSRGBAverage = LinearToSRGB(fLinearAverage); + Int32 SRGBAverage = static_cast(fSRGBAverage * NormVal); + SRGBAverage = std::min(SRGBAverage, static_cast( std::numeric_limits::max()) ); + SRGBAverage = std::max(SRGBAverage, static_cast( std::numeric_limits::min()) ); + return static_cast(SRGBAverage); + } + + template < typename ChannelType > + void ComputeCoarseMip(Uint32 NumChannels, bool IsSRGB, + const void *pFineMip, Uint32 FineMipStride, + void *pCoarseMip, Uint32 CoarseMipStride, + Uint32 CoarseMipWidth, Uint32 CoarseMipHeight) + { + for( Uint32 row = 0; row < CoarseMipHeight; ++row ) + for( Uint32 col = 0; col < CoarseMipWidth; ++col ) + { + auto FineRow0 = reinterpret_cast( reinterpret_cast(pFineMip) + row * 2 * FineMipStride ); + auto FineRow1 = reinterpret_cast( reinterpret_cast(pFineMip) + (row * 2 + 1 ) * FineMipStride ); + + for( Uint32 c = 0; c < NumChannels; ++c ) + { + auto Col00 = FineRow0[ col*2 * NumChannels + c ]; + auto Col01 = FineRow0[ (col*2+1) * NumChannels + c ]; + auto Col10 = FineRow1[ col*2 * NumChannels + c ]; + auto Col11 = FineRow1[ (col*2+1) * NumChannels + c ]; + auto &DstCol = reinterpret_cast(reinterpret_cast(pCoarseMip) + row * CoarseMipStride)[col * NumChannels + c]; + if( IsSRGB ) + DstCol = SRGBAverage( Col00, Col01, Col10, Col11 ); + else + DstCol = (Col00 + Col01 + Col10 + Col11)/4; + } + } + } + + template < typename ChannelType > + void RGBToRGBA(const void *pRGBData, Uint32 RGBStride, + void *pRGBAData, Uint32 RGBAStride, + Uint32 Width, Uint32 Height) + { + for( Uint32 row = 0; row < Height; ++row ) + for( Uint32 col = 0; col < Width; ++col ) + { + for( int c = 0; c < 3; ++c ) + { + reinterpret_cast( (reinterpret_cast(pRGBAData) + RGBAStride * row) ) [col *4 + c] = + reinterpret_cast( (reinterpret_cast(pRGBData) + RGBStride * row))[col*3 + c]; + } + reinterpret_cast( (reinterpret_cast(pRGBAData) + RGBAStride * row) ) [col *4 + 3] = std::numeric_limits::max(); + } + } + + void CreateTextureFromImage( Image *pSrcImage, + const TextureLoadInfo& TexLoadInfo, + Diligent::IRenderDevice *pDevice, + Diligent::ITexture **ppTexture ) + { + const auto& ImgDesc = pSrcImage->GetDesc(); + TextureDesc TexDesc; + TexDesc.Type = TEXTURE_TYPE_2D; + TexDesc.Width = ImgDesc.Width; + TexDesc.Height = ImgDesc.Height; + TexDesc.MipLevels = ComputeMipLevelsCount( TexDesc.Width, TexDesc.Height ); + if( TexLoadInfo.MipLevels > 0 ) + TexDesc.MipLevels = std::min(TexDesc.MipLevels, TexLoadInfo.MipLevels); + TexDesc.Usage = TexLoadInfo.Usage; + TexDesc.BindFlags = TexLoadInfo.BindFlags; + TexDesc.Format = TexLoadInfo.Format; + TexDesc.CPUAccessFlags = TexLoadInfo.CPUAccessFlags; + auto ChannelDepth = ImgDesc.BitsPerPixel / ImgDesc.NumComponents; + + Uint32 NumComponents = ImgDesc.NumComponents == 3 ? 4 : ImgDesc.NumComponents; + bool IsSRGB = (ImgDesc.NumComponents >= 3 && ChannelDepth == 8) ? TexLoadInfo.IsSRGB : false; + if( TexDesc.Format == TEX_FORMAT_UNKNOWN ) + { + if( ChannelDepth == 8 ) + { + switch( NumComponents ) + { + case 1: TexDesc.Format = TEX_FORMAT_R8_UNORM; break; + case 2: TexDesc.Format = TEX_FORMAT_RG8_UNORM; break; + case 4: TexDesc.Format = IsSRGB ? TEX_FORMAT_RGBA8_UNORM_SRGB : TEX_FORMAT_RGBA8_UNORM; break; + default: LOG_ERROR_AND_THROW( "Unexpected number of color channels (", ImgDesc.NumComponents, ")" ); + } + } + else if( ChannelDepth == 16 ) + { + switch( NumComponents ) + { + case 1: TexDesc.Format = TEX_FORMAT_R16_UNORM; break; + case 2: TexDesc.Format = TEX_FORMAT_RG16_UNORM; break; + case 4: TexDesc.Format = TEX_FORMAT_RGBA16_UNORM; break; + default: LOG_ERROR_AND_THROW( "Unexpected number of color channels (", ImgDesc.NumComponents, ")" ); + } + } + else + LOG_ERROR_AND_THROW( "Unsupported color channel depth (", ChannelDepth, ")" ); + } + else + { + const auto& TexFmtDesc = GetTextureFormatAttribs( TexDesc.Format ); + if( TexFmtDesc.NumComponents != NumComponents ) + LOG_ERROR_AND_THROW( "Incorrect number of components ", ImgDesc.NumComponents, ") for texture format ", TexFmtDesc.Name ); + if( TexFmtDesc.ComponentSize != ChannelDepth / 8 ) + LOG_ERROR_AND_THROW( "Incorrect channel size ", ChannelDepth, ") for texture format ", TexFmtDesc.Name ); + } + + + std::vector pSubResources(TexDesc.MipLevels); + std::vector< std::vector > Mips(TexDesc.MipLevels); + + if( ImgDesc.NumComponents == 3 ) + { + VERIFY_EXPR( NumComponents == 4 ); + auto RGBAStride = ImgDesc.Width * NumComponents * ChannelDepth / 8; + RGBAStride = (RGBAStride + 3) & (-4); + Mips[0].resize(RGBAStride * ImgDesc.Height); + pSubResources[0].pData = Mips[0].data(); + pSubResources[0].Stride = RGBAStride; + if( ChannelDepth == 8 ) + RGBToRGBA( pSrcImage->GetData()->GetDataPtr(), ImgDesc.RowStride, + Mips[0].data(), RGBAStride, + ImgDesc.Width, ImgDesc.Height); + else if( ChannelDepth == 16 ) + RGBToRGBA( pSrcImage->GetData()->GetDataPtr(), ImgDesc.RowStride, + Mips[0].data(), RGBAStride, + ImgDesc.Width, ImgDesc.Height); + } + else + { + pSubResources[0].pData = pSrcImage->GetData()->GetDataPtr(); + pSubResources[0].Stride = ImgDesc.RowStride; + } + + auto MipWidth = TexDesc.Width; + auto MipHeight = TexDesc.Height; + for( Uint32 m = 1; m < TexDesc.MipLevels; ++m ) + { + auto CoarseMipWidth = std::max(MipWidth/2u, 1u); + auto CoarseMipHeight = std::max(MipHeight/2u, 1u); + auto CoarseMipStride = CoarseMipWidth * NumComponents * ChannelDepth / 8; + CoarseMipStride = (CoarseMipStride + 3) & (-4); + Mips[m].resize(CoarseMipStride * CoarseMipHeight); + + if( ChannelDepth == 8 ) + ComputeCoarseMip( NumComponents, IsSRGB, + pSubResources[m-1].pData, pSubResources[m-1].Stride, + Mips[m].data(), CoarseMipStride, + CoarseMipWidth, CoarseMipHeight); + else if( ChannelDepth == 16 ) + ComputeCoarseMip( NumComponents, IsSRGB, + pSubResources[m-1].pData, pSubResources[m-1].Stride, + Mips[m].data(), CoarseMipStride, + CoarseMipWidth, CoarseMipHeight); + + pSubResources[m].pData = Mips[m].data(); + pSubResources[m].Stride = CoarseMipStride; + + MipWidth = CoarseMipWidth; + MipHeight = CoarseMipHeight; + } + + TextureData TexData; + TexData.pSubResources = pSubResources.data(); + TexData.NumSubresources = TexDesc.MipLevels; + + pDevice->CreateTexture( TexDesc, TexData, ppTexture ); + } + + void CreateTextureFromDDS( IDataBlob *pDDSData, + const TextureLoadInfo& TexLoadInfo, + Diligent::IRenderDevice *pDevice, + Diligent::ITexture **ppTexture ) + { + CreateDDSTextureFromMemoryEx(pDevice, + reinterpret_cast(pDDSData->GetDataPtr()), + static_cast(pDDSData->GetSize()), + 0, // maxSize + TexLoadInfo.Usage, + TexLoadInfo.BindFlags, + TexLoadInfo.CPUAccessFlags, + 0, // miscFlags + false, // forceSRGB + ppTexture ); + } +} -- cgit v1.2.3