function createP5ToDisplayPixels()

in toolkit/jb/svg.js [574:614]

• 15 lines of code
• 1 McCabe index (conditional complexity)

function createP5ToDisplayPixels(node, trgWidth, trgHeight, getPixels) {
    var srcWidth = window.innerWidth;
    var srcHeight = window.innerHeight;
    return function(p) {
        var setupCalled = false;
        p.preload = function() {};
        p.setup = function() { var c = p.createCanvas(srcWidth, srcHeight);
                               c.addClass('p5-inner-canvas');
                               c.canvas.style.transform = 'scale(' + (trgWidth / srcWidth) + ',' +
                                                                     (trgHeight / srcHeight) + ')';
                               p.noLoop();
                               setupCalled = true; }
        p.draw = function() {
            var pixels = getPixels();
            if (!pixels) return;
            p.loadPixels();
            var source = pixels;
            var target = p.pixels;
            var d = p.pixelDensity();
            for (var x = 0; x < srcWidth; x++) {
                    for (var y = 0; y < srcHeight; y++) {
                        for (var i = 0; i < d; i++) {
                            for (var j = 0; j < d; j++) {
                                pixelIdx = 4 * ((y * d + j) * srcWidth * d + (x * d + i));
                                target[pixelIdx] = source[pixelIdx];
                                target[pixelIdx+1] = source[pixelIdx+1];
                                target[pixelIdx+2] = source[pixelIdx+2];
                                target[pixelIdx+3] = source[pixelIdx+3];
                            }
                        }
                    }
                }
            p.updatePixels();
        };
        var prevRedraw = p.redraw;
        p.redraw = function() {
            if (!setupCalled) return;
            prevRedraw.call(this);
        };
    }
}