RasterImage.filled constructor
Implementation
factory RasterImage.filled(int w, int h, int r, int g, int b, int a) {
final buf = Uint8List(w * h * 4);
for (int i = 0; i < buf.length; i += 4) {
buf[i] = r;
buf[i + 1] = g;
buf[i + 2] = b;
buf[i + 3] = a;
}
return RasterImage(w, h, buf);
}