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Small updates to FrameRenderer for fun

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This commit is contained in:
juliandescottes 2012-09-08 23:10:05 +02:00
parent df405d917f
commit e4373ad133
1 changed files with 16 additions and 18 deletions
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34
js/rendering/FrameRenderer.js
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@ -1,16 +1,13 @@
(function () {
var ns = $.namespace("pskl.rendering");
this.dpi = null;
this.canvas = null;
ns.FrameRenderer = function (container, renderingOptions, className) {
if(container == undefined) {
throw "Bad FrameRenderer initialization. <container> undefined.";
}
this.container = container;
if(renderingOptions == undefined || renderingOptions.dpi == undefined || isNaN(dpi)) {
if(renderingOptions == undefined || renderingOptions.dpi == undefined) {
throw "Bad FrameRenderer initialization. <dpi> not well defined.";
}
@ -66,24 +63,25 @@
ns.FrameRenderer.prototype.getCanvas_ = function (frame) {
if(this.canvasConfigDirty) {
$(this.canvas).remove();
var width = frame.getWidth(),
height = frame.getHeight();
var canvas = document.createElement("canvas");
canvas.setAttribute("width", width * this.dpi);
canvas.setAttribute("height", height * this.dpi);
var canvasClassname = "canvas";
if(this.className) {
canvasClassname += " " + this.className;
}
canvas.setAttribute("class", canvasClassname);
this.canvas = canvas;
this.canvas = this.createCanvasForFrame_(frame);
this.container.appendChild(this.canvas);
this.canvasConfigDirty = false;
}
return this.canvas;
};
/**
* @private
*/
ns.FrameRenderer.prototype.createCanvasForFrame_ = function (frame) {
var canvas = document.createElement("canvas");
canvas.setAttribute("width", frame.getWidth() * this.dpi);
canvas.setAttribute("height", frame.getHeight() * this.dpi);
canvas.classList.add("canvas");
if(this.className) canvas.classList.add(this.className);
return canvas;
};
})();