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42 lines
1.3 KiB
HTML
42 lines
1.3 KiB
HTML
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<!DOCTYPE html>
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<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
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<title>Canvas test: 2d.state.saverestore.globalAlpha</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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<link rel="stylesheet" href="/common/canvas-tests.css">
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<body class="show_output">
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<h1>2d.state.saverestore.globalAlpha</h1>
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<p class="desc">save()/restore() works for globalAlpha</p>
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<p class="output">Actual output:</p>
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<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
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<ul id="d"></ul>
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<script>
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var t = async_test("save()/restore() works for globalAlpha");
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_addTest(function(canvas, ctx) {
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// Test that restore() undoes any modifications
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var old = ctx.globalAlpha;
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ctx.save();
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ctx.globalAlpha = 0.5;
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ctx.restore();
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_assertSame(ctx.globalAlpha, old, "ctx.globalAlpha", "old");
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// Also test that save() doesn't modify the values
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ctx.globalAlpha = 0.5;
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old = ctx.globalAlpha;
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// we're not interested in failures caused by get(set(x)) != x (e.g.
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// from rounding), so compare against 'old' instead of against 0.5
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ctx.save();
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_assertSame(ctx.globalAlpha, old, "ctx.globalAlpha", "old");
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ctx.restore();
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});
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</script>
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