// static
void FormatConversion::image3ubToImage4f( const Image3ub& source, Image4f& destination, bool flipUpDown, float fillAlpha )
{
int width = source.width();
int height = source.height();
for( int y = 0; y < height; ++y )
{
int yy = y;
if( flipUpDown )
{
yy = height - y - 1;
}
for( int x = 0; x < width; ++x )
{
Vector3i input = source.pixel( x, y );
Vector3f output = ColorUtils::intToFloat( input );
destination.setPixel( x, yy, Vector4f( output, fillAlpha ) );
}
}
}
// static
void D3D11Utils_Texture::copyTextureToImage( ID3D11Device* pDevice, ID3D11Texture2D* pTexture, Image4f& im )
{
D3D11_TEXTURE2D_DESC desc;
pTexture->GetDesc( &desc );
int width = desc.Width;
int height = desc.Height;
std::shared_ptr< StagingTexture2D > pST;
if( desc.Format == DXGI_FORMAT_R32G32_FLOAT )
{
pST.reset( StagingTexture2D::createFloat2( pDevice, width, height ) );
}
else if( desc.Format == DXGI_FORMAT_R32G32B32A32_FLOAT )
{
pST.reset( StagingTexture2D::createFloat4( pDevice, width, height ) );
}
if( desc.Format == DXGI_FORMAT_R32G32_FLOAT )
{
pST->copyFrom( pTexture );
D3D11_MAPPED_SUBRESOURCE mt = pST->mapForReadWrite();
ubyte* sourceData = reinterpret_cast< ubyte* >( mt.pData );
for( int y = 0; y < height; ++y )
{
float* sourceRow = reinterpret_cast< float* >( &( sourceData[ y * mt.RowPitch ] ) );
for( int x = 0; x < width; ++x )
{
float r = sourceRow[ 2 * x ];
float g = sourceRow[ 2 * x + 1 ];
im.setPixel( x, y, Vector4f( r, g, 0, 1 ) );
}
}
pST->unmap();
}
else if( desc.Format == DXGI_FORMAT_R32G32B32A32_FLOAT )
{
pST->copyFrom( pTexture );
D3D11_MAPPED_SUBRESOURCE mapping = pST->mapForReadWrite();
ubyte* sourceData = reinterpret_cast< ubyte* >( mapping.pData );
if( mapping.RowPitch == 4 * width * sizeof( float ) )
{
memcpy( im.pixels(), sourceData, 4 * width * height * sizeof( float ) );
}
else
{
for( int y = 0; y < height; ++y )
{
float* sourceRow = reinterpret_cast< float* >( &( sourceData[ y * mapping.RowPitch ] ) );
float* destinationRow = im.rowPointer( y );
memcpy( destinationRow, sourceRow, 4 * width * sizeof( float ) );
}
}
pST->unmap();
}
else
{
printf( "Warning: unable to copy texture to image, format is unsupported\n" );
}
}