rectangleColor function
Implementation
bool rectangleColor(Pointer<SdlRenderer> renderer, double x1, double y1,
double x2, double y2, int color) {
var co = Uint32List.fromList([color]).buffer.asUint8List();
return rectangleRgba(renderer, x1, y1, x2, y2, co[0], co[1], co[2], co[3]);
}