Function CompressImageSquish

trinity/Tr2DxtCompressor.cpp:644–676

}

void CompressImageSquish( const uint8_t* inBuf,
						  unsigned width,
						  unsigned height,
						  uint8_t* outBuf,
						  size_t outputPitch,
						  int squish_flags,
						  volatile const bool& cancel )
{
	uint8_t block[64];
	const unsigned outDx = ( squish_flags & squish::kDxt1 ) ? 8 : 16;
	for( unsigned j = 0; j < height; j += 4, inBuf += width * 4 * 4 )
	{
		uint8_t* outData = outBuf + ( j / 4 ) * outputPitch;

		if( cancel )
		{
			return;
		}

		for( unsigned i = 0; i < width; i += 4 )
		{
			ExtractBlock( inBuf + i * 4, width, block );
			// Swap the R and B
			// Squish wants RGB but our format is BGR
			for( int k = 0; k < 16; ++k )
			{
				std::swap( block[k * 4], block[k * 4 + 2] );
			}
			squish::Compress( block, outData, squish_flags );
			outData += outDx;
		}
	}
}

void CompressImageDXT5( const uint8_t* inBuf, uint8_t* outBuf, int width, int height, ptrdiff_t& outputBytes, volatile const bool& cancel )
{