| OLD | NEW |
| (Empty) | |
| 1 define([ 'util/ensureCallback', 'sprites/canvas' ], function (ensureCallback, ca
nvas) { |
| 2 function RenderContext(sourceData, frameData) { |
| 3 this.sourceData = sourceData; |
| 4 this.frameData = frameData; |
| 5 |
| 6 this.canvas = canvas(); |
| 7 |
| 8 this.context = this.canvas.getContext('2d'); |
| 9 this.context.globalCompositeOperation = 'source-over'; |
| 10 } |
| 11 |
| 12 RenderContext.prototype.load = function load(callback) { |
| 13 callback = ensureCallback(callback); |
| 14 |
| 15 // Anything not simply translated is disallowed |
| 16 var isValid = this.frameData.every(function (frame) { |
| 17 return frame.every(function (transform) { |
| 18 return transform.matrix[0] === 1 |
| 19 && transform.matrix[1] === 0 |
| 20 && transform.matrix[3] === 0 |
| 21 && transform.matrix[4] === 1; |
| 22 }); |
| 23 }); |
| 24 |
| 25 if (!isValid) { |
| 26 callback(new Error("Not supported")); |
| 27 return; |
| 28 } |
| 29 |
| 30 document.body.appendChild(this.canvas); |
| 31 |
| 32 callback(null); |
| 33 }; |
| 34 |
| 35 RenderContext.prototype.unload = function unload() { |
| 36 if (this.canvas.parentNode) { |
| 37 this.canvas.parentNode.removeChild(this.canvas); |
| 38 } |
| 39 }; |
| 40 |
| 41 RenderContext.prototype.clear = function clear() { |
| 42 this.canvas.width = this.canvas.width; |
| 43 }; |
| 44 |
| 45 RenderContext.prototype.renderFrame = function renderFrame(frameIndex) { |
| 46 var context = this.context; |
| 47 var sourceData = this.sourceData; |
| 48 |
| 49 var transforms = this.frameData[frameIndex]; |
| 50 var count = transforms.length; |
| 51 var i; |
| 52 |
| 53 // Reset view and transforms |
| 54 context.canvas.width = context.canvas.width; |
| 55 |
| 56 for (i = 0; i < count; ++i) { |
| 57 var transform = transforms[i]; |
| 58 context.setTransform(1, 0, 0, 1, Math.floor(transform.x), Math.floor
(transform.y)); |
| 59 sourceData.drawToCanvas(context, 0, 0, frameIndex); |
| 60 } |
| 61 }; |
| 62 |
| 63 return function (element, frameData) { |
| 64 return new RenderContext(element, frameData); |
| 65 }; |
| 66 }); |
| OLD | NEW |