piskel/js/rendering/CanvasRenderer.js

(function () {

	var ns = $.namespace("pskl.rendering");
	ns.CanvasRenderer = function (frame, dpi) {
		this.frame = frame;
		this.dpi = dpi;
	};

	ns.CanvasRenderer.prototype.render = function  (frame, dpi) {
		var canvas = this.createCanvas_();
		var context = canvas.getContext('2d');
		for(var col = 0, width = this.frame.getWidth(); col < width; col++) {
			for(var row = 0, height = this.frame.getHeight(); row < height; row++) {
				var color = this.frame.getPixel(col, row);
				this.renderPixel_(color, col, row, context);
			}
		}

		return context;
	};

	ns.CanvasRenderer.prototype.renderPixel_ = function (color, col, row, context) {
		if(color == Constants.TRANSPARENT_COLOR) {
			color = "#FFF";
		}

		context.fillStyle = color;
		context.fillRect(col * this.dpi, row * this.dpi, this.dpi, this.dpi);
	};

	ns.CanvasRenderer.prototype.createCanvas_ = function () {
		var width = this.frame.getWidth() * this.dpi;
		var height = this.frame.getHeight() * this.dpi;
		return pskl.CanvasUtils.createCanvas(width, height);
	};
})();