@:value(cast 8)@:impl@:enuminlineread onlyALPHA:BitmapDataChannel = 8
@:value(cast 4)@:impl@:enuminlineread onlyBLUE:BitmapDataChannel = 4
@:value(cast 2)@:impl@:enuminlineread onlyGREEN:BitmapDataChannel = 2
@:value(cast 1)@:impl@:enuminlineread onlyRED:BitmapDataChannel = 1