content/canvas/test/reftest/webgl-disable-test.html@6474c204b198 (annotated)
content/canvas/test/reftest/webgl-disable-test.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | <!DOCTYPE html> |
| michael@0 | 2 | <html class="reftest-wait"> |
| michael@0 | 3 | <head> |
| michael@0 | 4 | <meta charset="UTF-8"> |
| michael@0 | 5 | |
| michael@0 | 6 | <script type="text/javascript" src="webgl-utils.js"></script> |
| michael@0 | 7 | <script type="text/javascript"> |
| michael@0 | 8 | /* Disable Test |
| michael@0 | 9 | * |
| michael@0 | 10 | * If we succeed in getting a WebGL context, we will fill |
| michael@0 | 11 | * the canvas with red. If we fail to acquire a WebGL context, |
| michael@0 | 12 | * we will use Canvas2D to instead fill it with green. |
| michael@0 | 13 | * |
| michael@0 | 14 | * Note that this test differs from the others in that |
| michael@0 | 15 | * it will draw differently if it receives a WebGL context. |
| michael@0 | 16 | * Other tests are designed to fallback silently to Canvas2D. |
| michael@0 | 17 | * |
| michael@0 | 18 | * We use this test to assure that when we disable WebGL, |
| michael@0 | 19 | * WebGL does not function. This is trivially true for systems |
| michael@0 | 20 | * that don't support WebGL. This test is not viable for testing |
| michael@0 | 21 | * that WebGL works, as blocklisted systems will always draw green. |
| michael@0 | 22 | */ |
| michael@0 | 23 | |
| michael@0 | 24 | "use strict"; |
| michael@0 | 25 | |
| michael@0 | 26 | function renderGL(gl) { |
| michael@0 | 27 | gl.clearColor(1.0, 0.0, 0.0, 1.0); |
| michael@0 | 28 | gl.clear(gl.COLOR_BUFFER_BIT); |
| michael@0 | 29 | gl.finish(); |
| michael@0 | 30 | } |
| michael@0 | 31 | |
| michael@0 | 32 | function renderBackup(canvas) { |
| michael@0 | 33 | var context = canvas.getContext("2d"); |
| michael@0 | 34 | context.fillStyle = "rgba(0, 255, 0, 1.0)"; |
| michael@0 | 35 | context.fillRect(0, 0, 256, 256); |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | function runTest() { |
| michael@0 | 39 | var canvas = document.getElementById("canvas"); |
| michael@0 | 40 | var gl = initGL(canvas); |
| michael@0 | 41 | |
| michael@0 | 42 | if (gl) |
| michael@0 | 43 | renderGL(gl); |
| michael@0 | 44 | else |
| michael@0 | 45 | renderBackup(canvas); |
| michael@0 | 46 | |
| michael@0 | 47 | waitForComposite(testComplete); |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | function testComplete() { |
| michael@0 | 51 | document.documentElement.removeAttribute("class"); |
| michael@0 | 52 | } |
| michael@0 | 53 | </script> |
| michael@0 | 54 | </head> |
| michael@0 | 55 | |
| michael@0 | 56 | <body onload="rAF(runTest);"> |
| michael@0 | 57 | <canvas id="canvas" width="256" height="256"></canvas> |
| michael@0 | 58 | </body> |
| michael@0 | 59 | |
| michael@0 | 60 | </html> |
