/*
 * Create a left-to-right flip of the original image. Although we could
 * exchange pixel values in place, we take the easier approach of
 * creating a second image.
 */

PImage slu, reversed;
int w,h;

void setup() {
  size(408,300);  // take advantage of our knowledge of the size

// Can either load an image stored locally, as follows:
//  slu = loadImage("campus4.jpg");
// Or can load an image from a URL as follows:
  slu = loadImage("http://business.slu.edu/uploads/2012/11/08/slu-homepage-campus4.jpg");

  w = slu.width;
  h = slu.height;

  reversed = createImage(w,h,RGB);

  for (int x=0; x < w; x++) {
    for (int y=0; y < h; y++) {
      reversed.set(x, y, slu.get(w-1-x,y));
    }
  }

  // time to display it
  image(reversed, 0, 0);
}