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| 1 <!DOCTYPE html> |
| 2 <html> |
| 3 <head> |
| 4 <script src="../../resources/js-test.js"></script> |
| 5 </head> |
| 6 <body> |
| 7 <script> |
| 8 jsTestIsAsync = true; |
| 9 var worker = startWorker('./resources/canvas-createImageBitmap-blob-in-workers.j
s'); |
| 10 |
| 11 description('Test createImageBitmap with blob in workers.'); |
| 12 |
| 13 var imgWidth = 20; |
| 14 var imgHeight = 20; |
| 15 var imageData2; |
| 16 var numOfBitmaps = 5; |
| 17 var bitmapArray = []; |
| 18 |
| 19 var canvas1 = document.createElement("canvas"); |
| 20 var ctx1 = canvas1.getContext("2d"); |
| 21 ctx1.fillStyle = "#FF0000"; |
| 22 ctx1.fillRect(0, 0, imgWidth, imgHeight); |
| 23 |
| 24 function compareImageData(data1, data2) |
| 25 { |
| 26 if (data1.length != data2.length) { |
| 27 testFailed("The two image have different dimensions"); |
| 28 finishJSTest(); |
| 29 } |
| 30 for (var i = 0; i < data1.length; i++) { |
| 31 if (data1[i] != data2[i]) { |
| 32 testFailed("The two image have different pixel data"); |
| 33 finishJSTest(); |
| 34 } |
| 35 } |
| 36 } |
| 37 |
| 38 var newImg = new Image(); |
| 39 newImg.onload = function() { |
| 40 var canvas2 = document.createElement("canvas"); |
| 41 var ctx2 = canvas2.getContext("2d"); |
| 42 ctx2.drawImage(newImg, 0, 0, imgWidth, imgHeight); |
| 43 imageData2 = ctx2.getImageData(0, 0, imgWidth, imgHeight).data; |
| 44 |
| 45 var canvas3 = document.createElement("canvas"); |
| 46 var ctx3 = canvas3.getContext("2d"); |
| 47 for (var i = 0; i < numOfBitmaps; i++) { |
| 48 ctx3.clearRect(0, 0, imgWidth, imgHeight); |
| 49 ctx3.drawImage(bitmapArray[i], 0, 0, imgWidth, imgHeight); |
| 50 var imageData = ctx3.getImageData(0, 0, imgWidth, imgHeight).data; |
| 51 compareImageData(imageData, imageData2); |
| 52 } |
| 53 |
| 54 worker.onmessage = function(e) { |
| 55 var newImageBitmap = e.data.data; |
| 56 ctx3.clearRect(0, 0, imgWidth, imgHeight); |
| 57 ctx3.drawImage(newImageBitmap, 0, 0, imgWidth, imgHeight); |
| 58 var imageData = ctx3.getImageData(0, 0, imgWidth, imgHeight).data; |
| 59 compareImageData(imageData, imageData2); |
| 60 testPassed("ImageBitmaps created from blob in worker and in main have th
e same pixel data"); |
| 61 finishJSTest(); |
| 62 } |
| 63 } |
| 64 |
| 65 canvas1.toBlob(function(blob) { |
| 66 worker.postMessage(blob); |
| 67 for (var i = 0; i < numOfBitmaps; i++) { |
| 68 createImageBitmap(blob).then(imageBitmap => { |
| 69 bitmapArray.push(imageBitmap); |
| 70 }); |
| 71 } |
| 72 url = URL.createObjectURL(blob); |
| 73 newImg.src = url; |
| 74 }); |
| 75 |
| 76 </script> |
| 77 </body> |
| 78 </html> |
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Chromium Code Reviews
Issue 1660993002:
Revert of Simplify CanvasAsyncBlobCreator by removing ContextObserver and related tests (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master