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31 lines
946 B
HTML
31 lines
946 B
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.composite.globalAlpha.invalid</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.composite.globalAlpha.invalid</h1>
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<p class="desc"></p>
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<script>
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var t = async_test("");
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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.globalAlpha = 0.5;
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var a = ctx.globalAlpha; // might not be exactly 0.5, if it is rounded/quantised, so remember for future comparisons
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ctx.globalAlpha = Infinity;
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_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
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ctx.globalAlpha = -Infinity;
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_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
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ctx.globalAlpha = NaN;
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_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
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t.done();
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});
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</script>
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