import processing.video.*;

Capture myCap;
PImage arrMosaic;
int steps = 0, vwidth = 320, vheight = 240;
void setup()
{
  background(255);
  myCap = new Capture(this, myCap.list()[1], vwidth, vheight, 30);  
  size(vwidth, vheight);
  arrMosaic = new PImage(vwidth/steps,vheight/steps);
  steps = vheight;
}

 
void captureEvent(Capture myCap) {  
  myCap.read();  
}    

void draw()
{
  drawMosaic(myCap,steps);
}

void keyPressed()
{
  if(key == '+')
  {
    steps *= 2;
  }
  if(key == '-')
  {
    steps /= 2;
  }
}

void drawMosaic(PImage img, int steps)
{
  int m = 0;
  copy(img,0,0,img.width,img.height,0,0,img.width/steps,img.height/steps);
  arrMosaic = get(0,0,img.width/steps,img.height/steps);
  background(255);
  for(int i = 0; i < width; i+=img.width/steps)
  {
    for(int j = 0; j < height; j+=img.height/steps)
    {
	tint(getAreaColor(i,j,img.width/steps,img.height/steps));
	image(arrMosaic,i,j);
    }
  } 
}

color getAreaColor(int x, int y, int w, int h)
{
  int c = 0;
  int cR = 0, cG = 0, cB = 0;
  
  for(int i = x; i < min(x+w,width); i++)
  {
    for(int j = y; j < min(y+h,height); j++)
    {
	c++;
	cR += red(myCap.pixels[j*width+i]); 
	cG += green(myCap.pixels[j*width+i]); 
	cB += blue(myCap.pixels[j*width+i]); 
    }
  } 
  if(c==0) c = 1;
  return color(cR/c,cG/c,cB/c,255);
}