// Dartmouth CS 2, Winter 2009, Chris Bailey-Kellogg
// Notes 17 | Sketch 6

PImage grn;
int magD=10;  // diameter of magnifying rectangle
int rectSz=8; // how big the magnified pixels are

void setup() 
{
  size(800,463);  // size of green
  grn = loadImage("green.jpg");
  noStroke();
  rectMode(CENTER);
}

void draw() 
{
  background(grn);
  // magnify rectangle from mouse-magD to mouse+magD
  for (int y=-magD; y<magD; y++) {
    for (int x=-magD; x<magD; x++) {
      // to be careful, would make sure don't go out of bound of image 
      fill(grn.get(mouseX+x,mouseY+y));
      rect(mouseX+rectSz*x,mouseY+rectSz*y,rectSz,rectSz);
    }
  }
}