355 lines
12 KiB
C++
355 lines
12 KiB
C++
//-------------------------------------------------------------------------------------
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// DirectXTexMisc.cpp
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//
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// DirectX Texture Library - Misc image operations
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//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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// PARTICULAR PURPOSE.
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// http://go.microsoft.com/fwlink/?LinkId=248926
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//-------------------------------------------------------------------------------------
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#include "directxtexp.h"
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namespace DirectX
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{
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static const XMVECTORF32 g_Gamma22 = { 2.2f, 2.2f, 2.2f, 1.f };
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//-------------------------------------------------------------------------------------
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static HRESULT _ComputeMSE( _In_ const Image& image1, _In_ const Image& image2,
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_Out_ float& mse, _Out_writes_opt_(4) float* mseV,
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_In_ DWORD flags )
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{
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if ( !image1.pixels || !image2.pixels )
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return E_POINTER;
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assert( image1.width == image2.width && image1.height == image2.height );
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assert( !IsCompressed( image1.format ) && !IsCompressed( image2.format ) );
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const size_t width = image1.width;
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ScopedAlignedArrayXMVECTOR scanline( reinterpret_cast<XMVECTOR*>( _aligned_malloc( (sizeof(XMVECTOR)*width)*2, 16 ) ) );
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if ( !scanline )
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return E_OUTOFMEMORY;
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// Flags implied from image formats
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switch( image1.format )
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{
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case DXGI_FORMAT_B8G8R8X8_UNORM:
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flags |= CMSE_IGNORE_ALPHA;
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break;
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case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
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flags |= CMSE_IMAGE1_SRGB | CMSE_IGNORE_ALPHA;
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break;
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case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
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case DXGI_FORMAT_BC1_UNORM_SRGB:
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case DXGI_FORMAT_BC2_UNORM_SRGB:
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case DXGI_FORMAT_BC3_UNORM_SRGB:
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case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
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case DXGI_FORMAT_BC7_UNORM_SRGB:
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flags |= CMSE_IMAGE1_SRGB;
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break;
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}
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switch( image2.format )
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{
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case DXGI_FORMAT_B8G8R8X8_UNORM:
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flags |= CMSE_IGNORE_ALPHA;
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break;
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case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
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flags |= CMSE_IMAGE2_SRGB | CMSE_IGNORE_ALPHA;
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break;
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case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
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case DXGI_FORMAT_BC1_UNORM_SRGB:
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case DXGI_FORMAT_BC2_UNORM_SRGB:
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case DXGI_FORMAT_BC3_UNORM_SRGB:
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case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
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case DXGI_FORMAT_BC7_UNORM_SRGB:
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flags |= CMSE_IMAGE2_SRGB;
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break;
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}
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const uint8_t *pSrc1 = image1.pixels;
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const size_t rowPitch1 = image1.rowPitch;
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const uint8_t *pSrc2 = image2.pixels;
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const size_t rowPitch2 = image2.rowPitch;
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XMVECTOR acc = g_XMZero;
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static XMVECTORF32 two = { 2.0f, 2.0f, 2.0f, 2.0f };
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for( size_t h = 0; h < image1.height; ++h )
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{
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XMVECTOR* ptr1 = scanline.get();
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if ( !_LoadScanline( ptr1, width, pSrc1, rowPitch1, image1.format ) )
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return E_FAIL;
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XMVECTOR* ptr2 = scanline.get() + width;
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if ( !_LoadScanline( ptr2, width, pSrc2, rowPitch2, image2.format ) )
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return E_FAIL;
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for( size_t i = 0; i < width; ++i )
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{
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XMVECTOR v1 = *(ptr1++);
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if ( flags & CMSE_IMAGE1_SRGB )
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{
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v1 = XMVectorPow( v1, g_Gamma22 );
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}
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if ( flags & CMSE_IMAGE1_X2_BIAS )
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{
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v1 = XMVectorMultiplyAdd( v1, two, g_XMNegativeOne );
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}
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XMVECTOR v2 = *(ptr2++);
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if ( flags & CMSE_IMAGE2_SRGB )
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{
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v2 = XMVectorPow( v2, g_Gamma22 );
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}
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if ( flags & CMSE_IMAGE2_X2_BIAS )
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{
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v1 = XMVectorMultiplyAdd( v2, two, g_XMNegativeOne );
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}
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// sum[ (I1 - I2)^2 ]
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XMVECTOR v = XMVectorSubtract( v1, v2 );
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if ( flags & CMSE_IGNORE_RED )
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{
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v = XMVectorSelect( v, g_XMZero, g_XMMaskX );
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}
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if ( flags & CMSE_IGNORE_GREEN )
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{
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v = XMVectorSelect( v, g_XMZero, g_XMMaskY );
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}
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if ( flags & CMSE_IGNORE_BLUE )
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{
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v = XMVectorSelect( v, g_XMZero, g_XMMaskZ );
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}
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if ( flags & CMSE_IGNORE_ALPHA )
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{
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v = XMVectorSelect( v, g_XMZero, g_XMMaskW );
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}
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acc = XMVectorMultiplyAdd( v, v, acc );
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}
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pSrc1 += rowPitch1;
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pSrc2 += rowPitch2;
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}
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// MSE = sum[ (I1 - I2)^2 ] / w*h
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XMVECTOR d = XMVectorReplicate( float(image1.width * image1.height) );
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XMVECTOR v = XMVectorDivide( acc, d );
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if ( mseV )
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{
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XMStoreFloat4( reinterpret_cast<XMFLOAT4*>( mseV ), v );
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mse = mseV[0] + mseV[1] + mseV[2] + mseV[3];
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}
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else
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{
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XMFLOAT4 _mseV;
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XMStoreFloat4( &_mseV, v );
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mse = _mseV.x + _mseV.y + _mseV.z + _mseV.w;
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}
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return S_OK;
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}
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//=====================================================================================
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// Entry points
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//=====================================================================================
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//-------------------------------------------------------------------------------------
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// Copies a rectangle from one image into another
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//-------------------------------------------------------------------------------------
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_Use_decl_annotations_
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HRESULT CopyRectangle( const Image& srcImage, const Rect& srcRect, const Image& dstImage, DWORD filter, size_t xOffset, size_t yOffset )
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{
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if ( !srcImage.pixels || !dstImage.pixels )
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return E_POINTER;
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if ( IsCompressed( srcImage.format ) || IsCompressed( dstImage.format )
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|| IsPlanar( srcImage.format ) || IsPlanar( dstImage.format )
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|| IsPalettized( srcImage.format ) || IsPalettized( dstImage.format ) )
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return HRESULT_FROM_WIN32( ERROR_NOT_SUPPORTED );
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// Validate rectangle/offset
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if ( !srcRect.w || !srcRect.h || ( (srcRect.x + srcRect.w) > srcImage.width ) || ( (srcRect.y + srcRect.h) > srcImage.height ) )
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{
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return E_INVALIDARG;
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}
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if ( ( (xOffset + srcRect.w) > dstImage.width ) || ( (yOffset + srcRect.h) > dstImage.height ) )
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{
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return E_INVALIDARG;
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}
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// Compute source bytes-per-pixel
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size_t sbpp = BitsPerPixel( srcImage.format );
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if ( !sbpp )
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return E_FAIL;
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if ( sbpp < 8 )
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{
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// We don't support monochrome (DXGI_FORMAT_R1_UNORM)
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return HRESULT_FROM_WIN32( ERROR_NOT_SUPPORTED );
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}
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const uint8_t* pEndSrc = srcImage.pixels + srcImage.rowPitch*srcImage.height;
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const uint8_t* pEndDest = dstImage.pixels + dstImage.rowPitch*dstImage.height;
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// Round to bytes
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sbpp = ( sbpp + 7 ) / 8;
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const uint8_t* pSrc = srcImage.pixels + (srcRect.y * srcImage.rowPitch) + (srcRect.x * sbpp);
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if ( srcImage.format == dstImage.format )
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{
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// Direct copy case (avoid intermediate conversions)
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uint8_t* pDest = dstImage.pixels + (yOffset * dstImage.rowPitch) + (xOffset * sbpp);
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const size_t copyW = srcRect.w * sbpp;
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for( size_t h=0; h < srcRect.h; ++h )
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{
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if ( ( (pSrc+copyW) > pEndSrc ) || (pDest > pEndDest) )
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return E_FAIL;
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memcpy_s( pDest, pEndDest - pDest, pSrc, copyW );
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pSrc += srcImage.rowPitch;
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pDest += dstImage.rowPitch;
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}
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return S_OK;
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}
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// Compute destination bytes-per-pixel (not the same format as source)
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size_t dbpp = BitsPerPixel( dstImage.format );
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if ( !dbpp )
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return E_FAIL;
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if ( dbpp < 8 )
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{
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// We don't support monochrome (DXGI_FORMAT_R1_UNORM)
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return HRESULT_FROM_WIN32( ERROR_NOT_SUPPORTED );
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}
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// Round to bytes
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dbpp = ( dbpp + 7 ) / 8;
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uint8_t* pDest = dstImage.pixels + (yOffset * dstImage.rowPitch) + (xOffset * dbpp);
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ScopedAlignedArrayXMVECTOR scanline( reinterpret_cast<XMVECTOR*>( _aligned_malloc( (sizeof(XMVECTOR)*srcRect.w), 16 ) ) );
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if ( !scanline )
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return E_OUTOFMEMORY;
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const size_t copyS = srcRect.w * sbpp;
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const size_t copyD = srcRect.w * dbpp;
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for( size_t h=0; h < srcRect.h; ++h )
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{
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if ( ( (pSrc+copyS) > pEndSrc) || ((pDest+copyD) > pEndDest) )
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return E_FAIL;
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if ( !_LoadScanline( scanline.get(), srcRect.w, pSrc, copyS, srcImage.format ) )
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return E_FAIL;
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_ConvertScanline( scanline.get(), srcRect.w, dstImage.format, srcImage.format, filter );
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if ( !_StoreScanline( pDest, copyD, dstImage.format, scanline.get(), srcRect.w ) )
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return E_FAIL;
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pSrc += srcImage.rowPitch;
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pDest += dstImage.rowPitch;
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}
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return S_OK;
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}
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//-------------------------------------------------------------------------------------
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// Computes the Mean-Squared-Error (MSE) between two images
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//-------------------------------------------------------------------------------------
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_Use_decl_annotations_
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HRESULT ComputeMSE( const Image& image1, const Image& image2, float& mse, float* mseV, DWORD flags )
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{
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if ( !image1.pixels || !image2.pixels )
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return E_POINTER;
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if ( image1.width != image2.width || image1.height != image2.height )
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return E_INVALIDARG;
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if ( IsPlanar( image1.format ) || IsPlanar( image2.format )
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|| IsPalettized( image1.format ) || IsPalettized( image2.format ) )
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return HRESULT_FROM_WIN32( ERROR_NOT_SUPPORTED );
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if ( IsCompressed(image1.format) )
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{
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if ( IsCompressed(image2.format) )
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{
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// Case 1: both images are compressed, expand to RGBA32F
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ScratchImage temp1;
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HRESULT hr = Decompress( image1, DXGI_FORMAT_R32G32B32A32_FLOAT, temp1 );
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if ( FAILED(hr) )
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return hr;
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ScratchImage temp2;
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hr = Decompress( image2, DXGI_FORMAT_R32G32B32A32_FLOAT, temp2 );
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if ( FAILED(hr) )
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return hr;
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const Image* img1 = temp1.GetImage(0,0,0);
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const Image* img2 = temp2.GetImage(0,0,0);
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if ( !img1 || !img2 )
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return E_POINTER;
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return _ComputeMSE( *img1, *img2, mse, mseV, flags );
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}
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else
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{
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// Case 2: image1 is compressed, expand to RGBA32F
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ScratchImage temp;
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HRESULT hr = Decompress( image1, DXGI_FORMAT_R32G32B32A32_FLOAT, temp );
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if ( FAILED(hr) )
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return hr;
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const Image* img = temp.GetImage(0,0,0);
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if ( !img )
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return E_POINTER;
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return _ComputeMSE( *img, image2, mse, mseV, flags );
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}
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}
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else
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{
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if ( IsCompressed(image2.format) )
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{
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// Case 3: image2 is compressed, expand to RGBA32F
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ScratchImage temp;
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HRESULT hr = Decompress( image2, DXGI_FORMAT_R32G32B32A32_FLOAT, temp );
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if ( FAILED(hr) )
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return hr;
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const Image* img = temp.GetImage(0,0,0);
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if ( !img )
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return E_POINTER;
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return _ComputeMSE( image1, *img, mse, mseV, flags );
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}
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else
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{
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// Case 4: neither image is compressed
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return _ComputeMSE( image1, image2, mse, mseV, flags );
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}
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}
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}
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}; // namespace
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