AuroraMiddleware/DirectXTex
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DirectxTex: ComputeMSE flags for X2 bias

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This commit is contained in:
walbourn_cp 2013-07-31 13:15:42 -07:00
parent 8bfc1b7de3
commit d062ae2097
2 changed files with 13 additions and 0 deletions
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4
DirectXTex/DirectXTex.h
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@ -549,6 +549,10 @@ namespace DirectX
CMSE_IGNORE_BLUE = 0x40,
CMSE_IGNORE_ALPHA = 0x80,
// Ignore the channel when computing MSE
CMSE_IMAGE1_X2_BIAS = 0x100,
CMSE_IMAGE2_X2_BIAS = 0x200,
// Indicates that image should be scaled and biased before comparison (i.e. UNORM -> SNORM)
};
HRESULT ComputeMSE( _In_ const Image& image1, _In_ const Image& image2, _Out_ float& mse, _Out_writes_opt_(4) float* mseV, _In_ DWORD flags = 0 );

9
DirectXTex/DirectXTexMisc.cpp
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@ -84,6 +84,7 @@ static HRESULT _ComputeMSE( _In_ const Image& image1, _In_ const Image& image2,
const size_t rowPitch2 = image2.rowPitch;
XMVECTOR acc = g_XMZero;
static XMVECTORF32 two = { 2.0f, 2.0f, 2.0f, 2.0f };
for( size_t h = 0; h < image1.height; ++h )
{
@ -102,12 +103,20 @@ static HRESULT _ComputeMSE( _In_ const Image& image1, _In_ const Image& image2,
{
v1 = XMVectorPow( v1, g_Gamma22 );
}
if ( flags & CMSE_IMAGE1_X2_BIAS )
{
v1 = XMVectorMultiplyAdd( v1, two, g_XMNegativeOne );
}
XMVECTOR v2 = *(ptr2++);
if ( flags & CMSE_IMAGE2_SRGB )
{
v2 = XMVectorPow( v2, g_Gamma22 );
}
if ( flags & CMSE_IMAGE2_X2_BIAS )
{
v1 = XMVectorMultiplyAdd( v2, two, g_XMNegativeOne );
}
// sum[ (I1 - I2)^2 ]
XMVECTOR v = XMVectorSubtract( v1, v2 );