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41 lines
1.9 KiB
HTML
41 lines
1.9 KiB
HTML
<!DOCTYPE html>
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<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
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<title>OffscreenCanvas test: 2d.imageData.get.source.negative</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/common/canvas-tests.js"></script>
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<h1>2d.imageData.get.source.negative</h1>
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<p class="desc">getImageData() works with negative width and height, and returns top-to-bottom left-to-right</p>
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<script>
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var t = async_test("getImageData() works with negative width and height, and returns top-to-bottom left-to-right");
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t.step(function() {
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var offscreenCanvas = new OffscreenCanvas(100, 50);
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var ctx = offscreenCanvas.getContext('2d');
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ctx.fillStyle = '#000';
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ctx.fillRect(0, 0, 100, 50);
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ctx.fillStyle = '#fff';
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ctx.fillRect(20, 10, 60, 10);
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var imgdata1 = ctx.getImageData(85, 25, -10, -10);
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_assertSame(imgdata1.data[0], 255, "imgdata1.data[\""+(0)+"\"]", "255");
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_assertSame(imgdata1.data[1], 255, "imgdata1.data[\""+(1)+"\"]", "255");
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_assertSame(imgdata1.data[2], 255, "imgdata1.data[\""+(2)+"\"]", "255");
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_assertSame(imgdata1.data[3], 255, "imgdata1.data[\""+(3)+"\"]", "255");
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_assertSame(imgdata1.data[imgdata1.data.length-4+0], 0, "imgdata1.data[imgdata1.data.length-4+0]", "0");
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_assertSame(imgdata1.data[imgdata1.data.length-4+1], 0, "imgdata1.data[imgdata1.data.length-4+1]", "0");
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_assertSame(imgdata1.data[imgdata1.data.length-4+2], 0, "imgdata1.data[imgdata1.data.length-4+2]", "0");
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_assertSame(imgdata1.data[imgdata1.data.length-4+3], 255, "imgdata1.data[imgdata1.data.length-4+3]", "255");
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var imgdata2 = ctx.getImageData(0, 0, -1, -1);
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_assertSame(imgdata2.data[0], 0, "imgdata2.data[\""+(0)+"\"]", "0");
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_assertSame(imgdata2.data[1], 0, "imgdata2.data[\""+(1)+"\"]", "0");
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_assertSame(imgdata2.data[2], 0, "imgdata2.data[\""+(2)+"\"]", "0");
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_assertSame(imgdata2.data[3], 0, "imgdata2.data[\""+(3)+"\"]", "0");
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t.done();
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});
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</script>
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