Weird "Pixelate" Tool

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1

Hi, for my first topic I’m sharing what I have been up to today.

I spent a bit of time today making a weird tool to “pixelate” images, for now it as a bunch of is statements with preset brush sizes, but I intend change that so pixel size and spacing to be controlled more precisely and independently of one another.

After that I may start thinking of adding more shapes ( triangles , circles ) instead of just squares.
Image of the first tests

capture
capture1285×515 132 KB

Code 
PImage img;
int Image = width*height;
int pixel;
int brush_setup;
int X, Y;

void setup() {
  img = loadImage("test.png");

  size(512, 512);

  image(img, 0, 0);

  brush_setup = 1;

  noStroke();

  println("Brush Setup: ", brush_setup);
}

void draw() {
  pixel = get(mouseX, mouseY);
  fill(pixel);
}

void mouseDragged() {
  brush_change();
}

void keyPressed() {
  if (key == 'b' || key ==  'B') {
    brush_setup = brush_setup + 1;
    println("Brush Setup: ", brush_setup);
  }

  if (key == 'r' || key ==  'R') {
    image(img, 0, 0);
    println("Reseted!");
  }
}

void brush_change() {

  if (brush_setup == 1) {
    X = mouseX - (mouseX % 7);
    Y = mouseY - (mouseY % 7);
    rect(X, Y, 5, 5);
  }

  if (brush_setup == 2) {
    X = mouseX - (mouseX % 13);
    Y = mouseY - (mouseY % 13);
    rect(X, Y, 10, 10);
  }

  if (brush_setup == 3) {
    X = mouseX - (mouseX % 19);
    Y = mouseY - (mouseY % 19);
    rect(X, Y, 15, 15);
  }

  if (brush_setup == 4) {
    X = mouseX - (mouseX % 25);
    Y = mouseY - (mouseY % 25);
    rect(X, Y, 20, 20);
  }

  if (brush_setup == 5) {
    X = mouseX - (mouseX % 51);
    Y = mouseY - (mouseY % 11);
    rect(X, Y, 50, 10);
  }

  if (brush_setup == 6) {
    X = mouseX - (mouseX % 6);
    Y = mouseY - (mouseY % 76);
    rect(X, Y, 5, 75);
  }

  if (brush_setup == 7) {
    brush_setup = 1;
    println("Brush Setup: ", brush_setup);
  }
}
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