Function colorize

pattern/canvas.js:3081–3096

(img, color, bias)

}

function colorize(img, color, bias) {
    /* Returns a colorized image.
     *  - color: a Color (or array) of RGBA-values to multiply with each image pixel.
     *  - bias : a Color (or array) of RGBA-values to add to each image pixel.
     */
    var m1 = new Color(color || [1,1,1,1]).rgba();
    var m2 = new Color(bias || [0,0,0,0]).map({base: 255});
    return filter(img, function(p) {
        return [
            p[0] * m1[0] + m2[0],
            p[1] * m1[1] + m2[1],
            p[2] * m1[2] + m2[2],
            p[3] * m1[3] + m2[3]
        ];
    });
}

// function adjust(img, {hue:0, saturation:1.0, brightness:1.0, contrast:1.0})
function adjust(img, options) {