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| 1 <!DOCTYPE html> |
| 2 <!-- DO NOT EDIT! This test has been generated by tools/gentest.py. --> |
| 3 <title>OffscreenCanvas test: 2d.drawImage.negativesource</title> |
| 4 <script src="/resources/testharness.js"></script> |
| 5 <script src="/resources/testharnessreport.js"></script> |
| 6 <script src="/common/canvas-tests.js"></script> |
| 7 |
| 8 <h1>2d.drawImage.negativesource</h1> |
| 9 <p class="desc">Negative source width/height represents the correct rectangle</p
> |
| 10 |
| 11 |
| 12 <script> |
| 13 var t = async_test("Negative source width/height represents the correct rectangl
e"); |
| 14 t.step(function() { |
| 15 |
| 16 var offscreenCanvas = new OffscreenCanvas(100, 50); |
| 17 var ctx = offscreenCanvas.getContext('2d'); |
| 18 |
| 19 ctx.fillStyle = '#f00'; |
| 20 ctx.fillRect(0, 0, 100, 50); |
| 21 var promise = new Promise(function(resolve, reject) { |
| 22 var xhr = new XMLHttpRequest(); |
| 23 xhr.open("GET", '/images/ggrr-256x256.png'); |
| 24 xhr.responseType = 'blob'; |
| 25 xhr.send(); |
| 26 xhr.onload = function() { |
| 27 resolve(xhr.response); |
| 28 }; |
| 29 }); |
| 30 promise.then(function(response) { |
| 31 ctx.drawImage(response, 100, 78, -100, 50, 0, 0, 50, 50); |
| 32 ctx.drawImage(response, 100, 128, -100, -50, 50, 0, 50, 50); |
| 33 _assertPixelApprox(offscreenCanvas, 1,1, 0,255,0,255, "1,1", "0,255,0,255",
2); |
| 34 _assertPixelApprox(offscreenCanvas, 1,48, 0,255,0,255, "1,48", "0,255,0,255"
, 2); |
| 35 _assertPixelApprox(offscreenCanvas, 98,1, 0,255,0,255, "98,1", "0,255,0,255"
, 2); |
| 36 _assertPixelApprox(offscreenCanvas, 98,48, 0,255,0,255, "98,48", "0,255,0,25
5", 2); |
| 37 _assertPixelApprox(offscreenCanvas, 48,1, 0,255,0,255, "48,1", "0,255,0,255"
, 2); |
| 38 _assertPixelApprox(offscreenCanvas, 48,48, 0,255,0,255, "48,48", "0,255,0,25
5", 2); |
| 39 _assertPixelApprox(offscreenCanvas, 51,1, 0,255,0,255, "51,1", "0,255,0,255"
, 2); |
| 40 _assertPixelApprox(offscreenCanvas, 51,48, 0,255,0,255, "51,48", "0,255,0,25
5", 2); |
| 41 _assertPixelApprox(offscreenCanvas, 25,25, 0,255,0,255, "25,25", "0,255,0,25
5", 2); |
| 42 _assertPixelApprox(offscreenCanvas, 75,25, 0,255,0,255, "75,25", "0,255,0,25
5", 2); |
| 43 }); |
| 44 |
| 45 t.done(); |
| 46 |
| 47 }); |
| 48 </script> |
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