Method Compress

trinity/Tr2HostBitmap.cpp:512–558

}

bool Tr2HostBitmap::Compress( unsigned compressionFormat, unsigned qualityLevel, TriTextureRes* output )
{
	if( !output || !IsValid() || GetType() != TEX_TYPE_2D || compressionFormat >= TR2DXT_COMPRESS_COUNT )
	{
		return false;
	}

	static const PixelFormat format[TR2DXT_COMPRESS_COUNT] = {
		PIXEL_FORMAT_BC1_UNORM, // TR2DXT_COMPRESS_RT_DXT1			= 0,
		PIXEL_FORMAT_BC3_UNORM, // TR2DXT_COMPRESS_RT_DXT5			= 1,
		PIXEL_FORMAT_BC3_UNORM, // TR2DXT_COMPRESS_RT_DXT5N			= 2,
		PIXEL_FORMAT_BC3_UNORM, // TR2DXT_COMPRESS_RT_YCOCGDXT5		= 3,
		PIXEL_FORMAT_BC3_UNORM, // TR2DXT_COMPRESS_RT_3DC			= 4,
		PIXEL_FORMAT_BC1_UNORM, // TR2DXT_COMPRESS_SQUISH_DXT1		= 5,
		PIXEL_FORMAT_BC1_UNORM, // TR2DXT_COMPRESS_SQUISH_DXT3		= 6,
		PIXEL_FORMAT_BC3_UNORM, // TR2DXT_COMPRESS_SQUISH_DXT5		= 7,
		PIXEL_FORMAT_BC4_UNORM, // TR2DXT_COMPRESS_SQUISH_KBC4		= 8,
		PIXEL_FORMAT_BC5_UNORM, // TR2DXT_COMPRESS_SQUISH_KBC5		= 9,
	};

	{
		unsigned pitch = ( m_width + 3 ) / 4 * Tr2RenderContextEnum::GetBlockByteSize( format[compressionFormat] );
		CcpMallocBuffer destination( "Tr2HostBitmap::Compress", pitch * ( m_height + 3 ) / 4 );

		Tr2DxtCompressControl* control = CCP_NEW( "TriDevice::CompressSurface/control" ) Tr2DxtCompressControl;
		ON_BLOCK_EXIT( [&] { CCP_DELETE( control ); } );

		if( !Tr2DxtCompressSurfaceAsync( (Tr2DxtCompressionFormat)compressionFormat,
										 (uint8_t*)GetRawData(),
										 m_width,
										 m_height,
										 (uint8_t*)destination.get(),
										 pitch,
										 control,
										 qualityLevel ) )
		{
			return false;
		}

		Tr2HostBitmapPtr bitmap;
		bitmap.CreateInstance();
		bitmap->Create( m_width, m_height, 1, format[compressionFormat] );
		memcpy( bitmap->GetRawData(), destination.get(), bitmap->GetRawDataSize() );
		output->CreateFromHostBitmap( bitmap );
	}
	return true;
}


bool chan_selected( const std::string& channels, char channel )