Source code

Revision control

Copy as Markdown

Other Tools

Test Info:

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.composite.globalAlpha.invalid</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
<body class="show_output">
<h1>2d.composite.globalAlpha.invalid</h1>
<p class="desc"></p>
<p class="output">Actual output:</p>
<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
<ul id="d"></ul>
<script>
var t = async_test("");
_addTest(function(canvas, ctx) {
ctx.globalAlpha = 0.5;
// This may not set it to exactly 0.5 if it is rounded/quantised, so
// remember for future comparisons.
var a = ctx.globalAlpha;
ctx.globalAlpha = Infinity;
_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
ctx.globalAlpha = -Infinity;
_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
ctx.globalAlpha = NaN;
_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
});
</script>