/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://studio.sketchpad.cc/sp/pad/view/ro.iT0yavdkugG/rev.566
 * 
 * authors: 
 *   frederic.vernier

 * license (unless otherwise specified): 
 *   creative commons attribution-share alike 3.0 license.
 *   https://creativecommons.org/licenses/by-sa/3.0/ 
 */ 



/* @pjs preload="/static/uploaded_resources/p.2418/Ferme_St_Auban.jpg"; */
        
int i = 0; 
PImage img, img0;
boolean mouin = false; 

void setup() {  // this is run once.   
    
    // set the background color
    background(255);
    
    // canvas size (Variable aren't evaluated. Integers only, please.)
    size(640, 480); 
      
    // smooth edges
    smooth();
    
    // limit the number of frames per second
    frameRate(30);
    
    img = loadImage("/static/uploaded_resources/p.2418/Ferme_St_Auban.jpg");
    
    img0 = createImage(width, height, ARGB);
    img0.loadPixels();
    float ra = img.height/img0.height;
    for (int j=0; j < img0.height; j++) {
    for (int i=0; i < img0.width; i++) {
      int c = img.pixels[int(i*ra)+int(j*ra)*img.width];

      byte a = (c&0xff000000)>>24;if (a<0) a+=256;
      byte r = (c&0x00ff0000)>>16;if (r<0) a+=256;
      byte g = (c&0x0000ff00)>>8;if (g<0) a+=256;
      byte b = (c&0x000000ff)>>0;if (b<0) a+=256;
      byte l = max(max(r, g), b);
      if (dist(i, j, img0.width/2, img0.height/2)<5) l=0;
      img0.pixels[i+j*img0.width] = (255<<24)+(l<<16)+(l<<8)+(l<<0);
    }
  } 
  img0.updatePixels();
    
    img1 = createImage(width, height, ARGB);
    img1.loadPixels();
    colorMode(HSB);
    float ra = img.height/img1.height;
    for (int j=0; j < img1.height; j++) {
    for (int i=0; i < img1.width; i++) {
      int c = img.pixels[int(i*ra)+int(j*ra)*img.width];

      color c0 = color((128+hue(c))%255, 255, brightness(c));
      if (dist(i, j, img1.width/2, img1.height/2)<5) c0=color(0);
      img1.pixels[i+j*img0.width] = c0;
    }
  } 
  colorMode(RGB);
  img1.updatePixels();
  
  noLoop();
} 

void draw() {  // this is run repeatedly.  
   if (mouin)
     image(img0, 0, 0);
   else
     image(img1, 0, 0); 
   text("Look at the black point in the image for 30sec then move the mouse over the image without looking at somewhere else", 2, 30);
}

void mouseOver() {
  mouin = true;  
  redraw();  
}

void mouseOut() {
  mouin = false;
  redraw(); 
}