Function glow

pattern/canvas.js:3325–3333

(img, intensity, radius)

/*--- IMAGE FILTERS | LIGHT ------------------------------------------------------------------------*/

function glow(img, intensity, radius) {
    /* Returns the image blended with a blurred version, yielding a glowing effect.
     *  - intensity: the opacity of the blur (0.0-1.0).
     *  - radius   : the blur radius. 
     */
    if (intensity === undefined) intensity = 0.5;
    var b = blur(img, radius);
    return blend(ADD, img, b, 0, 0, intensity);
}

function bloom(img, intensity, radius, threshold) {
    /* Returns the image blended with a blurred brightpass version, yielding a "magic glow" effect.