Function adjust_saturation

pattern/canvas.js:3114–3119

(pixels, m)

        });
    }
    var adjust_saturation = function(pixels, m) {
        pixels.map(function(p) {
            var i = (0.3*p[0] + 0.59*p[1] + 0.11*p[2]) * (1-m); 
            return [p[0]*m + i, p[1]*m + i, p[2]*m + i, p[3]]; 
        });
    }
    var adjust_brightness = function(pixels, m) {
        pixels.map(function(p) {
            return [p[0] + m, p[1] + m, p[2] + m, p[3]];