2007-12-05 18:51:12 -08:00
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<!DOCTYPE HTML>
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<title>Canvas test: 2d.state.saverestore.globalAlpha</title>
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2008-08-10 21:01:14 -07:00
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<!-- Testing: save()/restore() works for globalAlpha -->
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2007-12-05 18:51:12 -08:00
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<script src="/MochiKit/MochiKit.js"></script>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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2008-08-10 21:01:14 -07:00
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<link rel="stylesheet" href="/tests/SimpleTest/test.css">
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2007-12-05 18:51:12 -08:00
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<body>
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<canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
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<script>
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SimpleTest.waitForExplicitFinish();
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MochiKit.DOM.addLoadEvent(function () {
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var canvas = document.getElementById('c');
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var ctx = canvas.getContext('2d');
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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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ok(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 d instead of against 0.5
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ctx.save();
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ok(ctx.globalAlpha === old, "ctx.globalAlpha === old");
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ctx.restore();
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2008-08-10 21:01:14 -07:00
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SimpleTest.finish();
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2007-12-05 18:51:12 -08:00
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});
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</script>
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