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1 <script src = "../../../../resources/js-test.js"></script> | |
2 <script src = "../../../../fast/canvas/script-tests/canvas-toBlob-toDataURL-race
.js"></script> | |
3 <script type = 'text/javascript'> | |
4 description("Verifies if synchronous PNG image encoding (toDataURL) conflicts wi
th asynchronous image encoding (toBlob)"); | |
5 | |
6 //Fire a bunch of toBlob operations of canvas to keep the async thread busy | |
7 var j = 0; // due to async nature of toBlob we need a separate counter | |
8 for (var i = 0; i < numToBlobCalls; i++) | |
9 { | |
10 canvas.toBlob(function(blob) { | |
11 url = URL.createObjectURL(blob); | |
12 testImages[j++].src = url; | |
13 }); | |
14 } | |
15 | |
16 //Then file a bunch of toDataURL operation on main thread, so both threads now c
ompete for image encoding | |
17 for (var i = numToBlobCalls; i < (numToDataURLCalls + numToBlobCalls); i++) | |
18 { | |
19 testImages[i].src = canvas.toDataURL(); | |
20 } | |
21 </script> | |
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