gecko/content/canvas/test/webgl/more/conformance/getContext.html

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HTML

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="../unit.css" />
<script type="application/x-javascript" src="../unit.js"></script>
<script type="application/x-javascript" src="../util.js"></script>
<script type="application/x-javascript">
Tests.testGetWebGL = function() {
var canvas = document.getElementById('webgl');
var gl;
assertOk(function(){gl = canvas.getContext(GL_CONTEXT_ID)});
assertFail("Shouldn't be able to get 2D context after getting WebGL context", function(){canvas.getContext('2d')});
assertOk(function(){canvas.getContext(GL_CONTEXT_ID)});
}
Tests.testGet2D = function() {
var canvas = document.getElementById('2d');
var ctx;
assertOk(function(){ctx = canvas.getContext('2d')});
assertFail("Shouldn't be able to get WebGL context after getting 2D context", function(){canvas.getContext(GL_CONTEXT_ID)});
assertOk(function(){canvas.getContext('2d')});
}
</script>
<style>canvas{position:absolute;}</style>
</head><body>
<canvas id="2d" width="1" height="1"></canvas>
<canvas id="webgl" width="1" height="1"></canvas>
</body></html>