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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.imageData.get.source.negative</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.imageData.get.source.negative</h1> | |
9 <p class="desc">getImageData() works with negative width and height, and returns
top-to-bottom left-to-right</p> | |
10 | |
11 | |
12 <script> | |
13 var t = async_test("getImageData() works with negative width and height, and ret
urns top-to-bottom left-to-right"); | |
14 t.step(function() { | |
15 | |
16 var offscreenCanvas = new OffscreenCanvas(100, 50); | |
17 var ctx = offscreenCanvas.getContext('2d'); | |
18 | |
19 ctx.fillStyle = '#000'; | |
20 ctx.fillRect(0, 0, 100, 50); | |
21 ctx.fillStyle = '#fff'; | |
22 ctx.fillRect(20, 10, 60, 10); | |
23 var imgdata1 = ctx.getImageData(85, 25, -10, -10); | |
24 _assertSame(imgdata1.data[0], 255, "imgdata1.data[\""+(0)+"\"]", "255"); | |
25 _assertSame(imgdata1.data[1], 255, "imgdata1.data[\""+(1)+"\"]", "255"); | |
26 _assertSame(imgdata1.data[2], 255, "imgdata1.data[\""+(2)+"\"]", "255"); | |
27 _assertSame(imgdata1.data[3], 255, "imgdata1.data[\""+(3)+"\"]", "255"); | |
28 _assertSame(imgdata1.data[imgdata1.data.length-4+0], 0, "imgdata1.data[imgdata1.
data.length-4+0]", "0"); | |
29 _assertSame(imgdata1.data[imgdata1.data.length-4+1], 0, "imgdata1.data[imgdata1.
data.length-4+1]", "0"); | |
30 _assertSame(imgdata1.data[imgdata1.data.length-4+2], 0, "imgdata1.data[imgdata1.
data.length-4+2]", "0"); | |
31 _assertSame(imgdata1.data[imgdata1.data.length-4+3], 255, "imgdata1.data[imgdata
1.data.length-4+3]", "255"); | |
32 var imgdata2 = ctx.getImageData(0, 0, -1, -1); | |
33 _assertSame(imgdata2.data[0], 0, "imgdata2.data[\""+(0)+"\"]", "0"); | |
34 _assertSame(imgdata2.data[1], 0, "imgdata2.data[\""+(1)+"\"]", "0"); | |
35 _assertSame(imgdata2.data[2], 0, "imgdata2.data[\""+(2)+"\"]", "0"); | |
36 _assertSame(imgdata2.data[3], 0, "imgdata2.data[\""+(3)+"\"]", "0"); | |
37 | |
38 t.done(); | |
39 | |
40 }); | |
41 </script> | |
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