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| 1 // DO NOT EDIT! This test has been generated by tools/gentest.py. |
| 2 // OffscreenCanvas test in a worker:2d.composite.uncovered.image.destination-in |
| 3 // Description:drawImage() draws pixels not covered by the source object as (0,0
,0,0), and does not leave the pixels unchanged. |
| 4 // Note: |
| 5 |
| 6 importScripts("/resources/testharness.js"); |
| 7 importScripts("/common/canvas-tests.js"); |
| 8 |
| 9 var t = async_test("drawImage() draws pixels not covered by the source object as
(0,0,0,0), and does not leave the pixels unchanged."); |
| 10 t.step(function() { |
| 11 |
| 12 var offscreenCanvas = new OffscreenCanvas(100, 50); |
| 13 var ctx = offscreenCanvas.getContext('2d'); |
| 14 |
| 15 |
| 16 ctx.fillStyle = 'rgba(0, 255, 255, 0.5)'; |
| 17 ctx.fillRect(0, 0, 100, 50); |
| 18 ctx.globalCompositeOperation = 'destination-in'; |
| 19 var promise = new Promise(function(resolve, reject) { |
| 20 var xhr = new XMLHttpRequest(); |
| 21 xhr.open("GET", '/images/yellow.png'); |
| 22 xhr.responseType = 'blob'; |
| 23 xhr.send(); |
| 24 xhr.onload = function() { |
| 25 resolve(xhr.response); |
| 26 }; |
| 27 }); |
| 28 promise.then(function(response) { |
| 29 ctx.drawImage(response, 40, 40, 10, 10, 40, 50, 10, 10); |
| 30 _assertPixelApprox(offscreenCanvas, 15,15, 0,0,0,0, "15,15", "0,0,0,0", 5); |
| 31 _assertPixelApprox(offscreenCanvas, 50,25, 0,0,0,0, "50,25", "0,0,0,0", 5); |
| 32 }); |
| 33 |
| 34 t.done(); |
| 35 |
| 36 }); |
| 37 done(); |
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