Home | History | Annotate | Download | only in cc 
      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 'use strict';
      6 
      7 base.exportTo('cc', function() {
      8 
      9   /**
     10    * @constructor
     11    */
     12   function PictureAsCanvas(picture, errorOrCanvas) {
     13     this.picture_ = picture;
     14     if (errorOrCanvas instanceof HTMLCanvasElement) {
     15       this.error_ = undefined;
     16       this.canvas_ = errorOrCanvas;
     17     } else {
     18       this.error_ = errorOrCanvas;
     19       this.canvas_ = undefined;
     20     }
     21   };
     22 
     23   /**
     24    * Creates a new pending PictureAsCanvas (no canvas and no error).
     25    *
     26    * @return {PictureAsCanvas} a new pending PictureAsCanvas.
     27    */
     28   PictureAsCanvas.Pending = function(picture) {
     29     return new PictureAsCanvas(picture, undefined);
     30   };
     31 
     32   PictureAsCanvas.prototype = {
     33     get picture() {
     34       return this.picture_;
     35     },
     36 
     37     get error() {
     38       return this.error_;
     39     },
     40 
     41     get canvas() {
     42       return this.canvas_;
     43     },
     44 
     45     isPending: function() {
     46       return this.error_ === undefined && this.canvas_ === undefined;
     47     }
     48   };
     49 
     50   return {
     51     PictureAsCanvas: PictureAsCanvas
     52   };
     53 });
     54