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);
  };
})();