content/canvas/test/reftest/webgl-hanging-fb-test.html@97036ab72558
content/canvas/test/reftest/webgl-hanging-fb-test.html
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 <!DOCTYPE html>
2 <html class="reftest-wait">
3 <head>
4 <meta charset="UTF-8">
6 <script type="text/javascript" src="webgl-utils.js"></script>
7 <script type="text/javascript">
8 /* Hanging Framebuffer Test
9 *
10 * Clear the canvas to green, but create and bind a new framebuffer
11 * before returning. This will fail if we blindly read from the bound
12 * framebuffer, instead of binding to the screen and reading from that.
13 *
14 * How failure looks isn't well defined, since this is an empty framebuffer,
15 * thus is incomplete, and should cause errors if it's read from.
16 */
18 "use strict";
20 function renderGL(gl) {
21 gl.clearColor(0.0, 1.0, 0.0, 1.0);
22 gl.clear(gl.COLOR_BUFFER_BIT);
24 var fb = gl.createFramebuffer();
25 gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
27 gl.finish();
28 }
30 function renderFailure(canvas) {
31 // This will also trigger RAF for us.
32 var context = canvas.getContext("2d");
33 context.fillText('WebGL failed.', 64, 64);
34 }
36 function runTest() {
37 var canvas = document.getElementById("canvas");
38 var gl = initGL(canvas);
40 if (gl)
41 renderGL(gl);
42 else
43 renderFailure(canvas);
45 waitForComposite(testComplete);
46 }
48 function testComplete() {
49 document.documentElement.removeAttribute("class");
50 }
51 </script>
52 </head>
54 <body onload="rAF(runTest);">
55 <canvas id="canvas" width="256" height="256"></canvas>
56 </body>
58 </html>
