image/shape mask

gistfile1.txt

import processing.core.*;

public class MaskingTest extends PApplet {
  PShape mask;
	PImage profileImage;

	public void setup() {
		size(800, 600, P3D);
		profileImage = loadImage("http://behance.vo.llnwd.net/profiles15/2970301/projects/9502097/404x344d3f03e5e6a05fba901c31189f9236.jpg");
	}

	public void draw() {
		background(0);

		PGraphics maskImage = createGraphics(profileImage.width,
				profileImage.height);
		maskImage.beginDraw();
		maskImage.ellipseMode(CENTER);
		maskImage.ellipse(profileImage.width / 2, profileImage.height / 2, 200,
				200);
		maskImage.endDraw();

		profileImage.mask(maskImage);

		image(profileImage, 0, 0);
	}
}