Create Image

/**
 * Create Image. 
 * 
 * The createImage() function provides a fresh buffer of pixels to play with.
 * This example creates an image gradient.
 */

PImage* img;

void setup() {
    size(640, 360);

    img = createImage(230, 230, ARGB);

    int total = img->width * img->height;

    for (int i = 0; i < total; i++) {
        float a = map(i, 0, total, 255, 0);
        img->pixels[i] = color(0, 153, 204, a);
    }
}

void draw() {
    background(0);

    image(img, 90, 80);

    image(img,
          mouseX - img->width / 2,
          mouseY - img->height / 2);
}