Adding support for floating point input/output. Work in progress.

src/nvtt/CompressionOptions.h

@@ -45,6 +45,10 @@ namespace nvtt
 		uint gmask;
 		uint bmask;
 		uint amask;
+		uint8 rsize;
+		uint8 gsize;
+		uint8 bsize;
+		uint8 asize;
 		
 		PixelType pixelType;