/**
 * megaboring roberttwomey 
 * 
 */

PImage a, brush, maskimg, masked;
int x, y, mix;

void setup()
{
  size(screen.width, screen.height);
  noStroke();
  background(0);
  smooth();
  x=0;
  y=0;
  mix=32;
  a = loadImage("six.jpg");
  a.resize(width, height);
  maskimg = createImage(width, height, ALPHA);
  for(int i=0;i<width;i++)
    for(int j=0;j<height;j++)
      maskimg.pixels[i+j*width]=0;
  masked=a;
  brush=loadImage("circle_mask.png");
  brush.resize(30, 30);
}

void mouseMoved() {
}

void mouseDragged() {
  drawTransparentCircle();
}

void mousePressed() {
  drawTransparentCircle();
}

void drawTransparentCircle() {
  int conX = constrain(mouseX, 0, a.width-30);
  int conY = constrain(mouseY, 0, a.height-30);

  //image(b, conX, conY);
  maskimg.blend(brush, 0, 0, brush.width, brush.height, conX, conY, brush.width, brush.height, ADD);
//  tint(255);
  a.mask(maskimg);
  image(a, 0, 0, width, height);
}

void draw()
{

  if(keyPressed) {
    if(key == '+') {
      mix--;
    }
    if(key == '-') {
      mix++;
    }
    println(mix);
    tint(255, mix);
    image(a, 0, 0, width, height);
  }
//    image(maskimg,0, 0);
}