| /* |
| * Copyright (C) 2015-2017 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| SimpleCanvasStage = Utilities.createSubclass(Stage, |
| function(canvasObject) |
| { |
| Stage.call(this); |
| this._canvasObject = canvasObject; |
| this.objects = []; |
| this.offsetIndex = 0; |
| }, { |
| |
| initialize: function(benchmark, options) |
| { |
| Stage.prototype.initialize.call(this, benchmark, options); |
| this.context = this.element.getContext("2d"); |
| }, |
| |
| tune: function(count) |
| { |
| if (count == 0) |
| return; |
| |
| if (count < 0) { |
| this.offsetIndex = Math.min(this.offsetIndex - count, this.objects.length); |
| return; |
| } |
| |
| var newIndex = this.offsetIndex - count; |
| if (newIndex < 0) { |
| this.offsetIndex = 0; |
| newIndex = -newIndex; |
| for (var i = 0; i < newIndex; ++i) { |
| if (this._canvasObject.constructor === Array) |
| this.objects.push(new (Stage.randomElementInArray(this._canvasObject))(this)); |
| else |
| this.objects.push(new this._canvasObject(this)); |
| } |
| } else |
| this.offsetIndex = newIndex; |
| }, |
| |
| animate: function() |
| { |
| var context = this.context; |
| context.clearRect(0, 0, this.size.x, this.size.y); |
| for (var i = this.offsetIndex, length = this.objects.length; i < length; ++i) |
| this.objects[i].draw(context); |
| }, |
| |
| complexity: function() |
| { |
| return this.objects.length - this.offsetIndex; |
| } |
| }); |