//Assignment 3

//Global variables
xImage b;
xImage a;
int blockSize = 2;
PFont font;


//Setup Method----------------------------------------------------------------------------------
void setup()
{
  size(430, 323);
  background (10);
  noStroke();
  font = loadFont ("Andalus-22.vlw");
  textFont (font, 14);
  
  a = new xImage("bitrilito.jpg");
  image(a, 220, 10);
  
  b = new xImage("bitrilito.jpg");
  image(b, 10, 10);
}

//Draw method-----------------------------------------------------------------------------------
void draw()
{
  b.mosaic(blockSize);
  b.updatePixels();
}

void keyPressed(){  // las teclas no funcionaban porque esto debe estar implementado aquí una vez que uno lo ve es fácil :-)
if (keyPressed == true && key == '+') blockSize = blockSize+1;
if (keyPressed == true && key == '-') blockSize = abs(blockSize-1);
}

void mousePressed()
{  
if (mouseButton == RIGHT) blockSize=blockSize+1;
if (mouseButton == LEFT) blockSize=abs(blockSize-1);
}

//Subclass that contains a mosaic method----------------------------------------------------------
class xImage extends PImage
{
  xImage(){
    super();
  }

  xImage(String filename){
    PImage X = loadImage(filename); 
    this.width = X.width;
    this.height = X.height;
    this.pixels = X.pixels;
    this.format = RGB;
    this.cache = null;  
  }
    
  color colour (int x , int y) 
  {
    x = constrain(x, 10, width-1);
    y = constrain(y, 10, height-1);
    return pixels[y*width+x];
  }

  void mosaic(int blockSize) 
  {
    if (blockSize <=1) 
    {
      fill (255);
      text ("Almost like without pixelation!", 15, 30);
      return;
    }
    if (blockSize*10 > this.width) 
    {
      fill (255);
      text ("Isn't pixelated enough?", 50,30);
      return;
    }
    for (int i = 10; i <= height; i += blockSize)
    {
      for (int j = 10; j <= width; j += blockSize)
      {
        fill(colour(j + blockSize/2, i + blockSize/2));
        rect(j, i, blockSize, blockSize);
      }
    }
  }
}