piskel/js/rendering/CanvasRenderer.js
2013-05-27 23:42:53 +02:00

36 lines
1.0 KiB
JavaScript

(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);
};
})();