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