                     
                     for bitmap in bitmaps {
                         
-                        image._fast_decode(bitmap, false, UInt8.self) { (destination, source) in
+                        image._fast_decode(bitmap, is_opaque, UInt8.self) { (destination, source) in
                             
                             var source = source
                             

                    
                    for bitmap in bitmaps {
                        
                        image._fast_decode(bitmap, false, UInt8.self) { (destination, source) in
                            
                            var source = source
                            

                    
                    for bitmap in bitmaps {
                        
                        image._fast_decode(bitmap, is_opaque, UInt16.self) { (destination, source) in
                            
                            var source = source
                            
