OptionalradiusThe radius of the last stop in pixels. Default: the distance to the farthest corner
The colors along the gradient: their positions (0..1) and colors, like Colors.gradient takes them
({ 0: 0xff0000ff, 0.5: 0xffff00ff, 1: 0x00ff00ff }), or just the colors, evenly spaced
([0xff0000ff, 0x00ff00ff])
OptionalxThe x position of the center in pixels. Default: the middle of the image
OptionalyThe y position of the center in pixels. Default: the middle of the image
Options of Image.radialGradient