content/canvas/test/reftest/webgl-color-alpha-test.html@6474c204b198 (annotated)
content/canvas/test/reftest/webgl-color-alpha-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 | /* Color-Alpha Test |
| michael@0 | 9 | * |
| michael@0 | 10 | * Clear the four quadrants of the canvas as follows: |
| michael@0 | 11 | * +------+------+ |
| michael@0 | 12 | * | red |green | |
| michael@0 | 13 | * | | | |
| michael@0 | 14 | * +------+------+ |
| michael@0 | 15 | * | blue |white | |
| michael@0 | 16 | * | | | |
| michael@0 | 17 | * +------+------+ |
| michael@0 | 18 | * However, unlike the Color test, clear with a given alpha value. |
| michael@0 | 19 | * What effect this has depends on the context-creation args passed |
| michael@0 | 20 | * to this page. |
| michael@0 | 21 | * |
| michael@0 | 22 | * Here we check that we handle various combinations of alpha and |
| michael@0 | 23 | * premultipliedAlpha correctly. |
| michael@0 | 24 | */ |
| michael@0 | 25 | |
| michael@0 | 26 | "use strict"; |
| michael@0 | 27 | |
| michael@0 | 28 | function renderGL(gl, value, alpha) { |
| michael@0 | 29 | gl.enable(gl.SCISSOR_TEST); |
| michael@0 | 30 | |
| michael@0 | 31 | gl.scissor(0, 128, 128, 128); |
| michael@0 | 32 | gl.clearColor(value, 0.0, 0.0, alpha); |
| michael@0 | 33 | gl.clear(gl.COLOR_BUFFER_BIT); |
| michael@0 | 34 | |
| michael@0 | 35 | gl.scissor(128, 128, 128, 128); |
| michael@0 | 36 | gl.clearColor(0.0, value, 0.0, alpha); |
| michael@0 | 37 | gl.clear(gl.COLOR_BUFFER_BIT); |
| michael@0 | 38 | |
| michael@0 | 39 | gl.scissor(0, 0, 128, 128); |
| michael@0 | 40 | gl.clearColor(0.0, 0.0, value, alpha); |
| michael@0 | 41 | gl.clear(gl.COLOR_BUFFER_BIT); |
| michael@0 | 42 | |
| michael@0 | 43 | gl.scissor(128, 0, 128, 128); |
| michael@0 | 44 | gl.clearColor(value, value, value, alpha); |
| michael@0 | 45 | gl.clear(gl.COLOR_BUFFER_BIT); |
| michael@0 | 46 | |
| michael@0 | 47 | gl.finish(); |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | function renderFailure(canvas) { |
| michael@0 | 51 | // This will also trigger RAF for us. |
| michael@0 | 52 | var context = canvas.getContext("2d"); |
| michael@0 | 53 | context.fillText('WebGL failed.', 64, 64); |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | function runTest() { |
| michael@0 | 57 | var canvas = document.getElementById("canvas"); |
| michael@0 | 58 | var gl = initGL(canvas); |
| michael@0 | 59 | |
| michael@0 | 60 | var value = arg("colorVal"); |
| michael@0 | 61 | var alpha = arg("alphaVal"); |
| michael@0 | 62 | |
| michael@0 | 63 | if (gl) |
| michael@0 | 64 | renderGL(gl, value, alpha); |
| michael@0 | 65 | else |
| michael@0 | 66 | renderFailure(canvas); |
| michael@0 | 67 | |
| michael@0 | 68 | waitForComposite(testComplete); |
| michael@0 | 69 | } |
| michael@0 | 70 | |
| michael@0 | 71 | function testComplete() { |
| michael@0 | 72 | document.documentElement.removeAttribute("class"); |
| michael@0 | 73 | } |
| michael@0 | 74 | </script> |
| michael@0 | 75 | </head> |
| michael@0 | 76 | |
| michael@0 | 77 | <body onload="rAF(runTest);"> |
| michael@0 | 78 | <canvas id="canvas" width="256" height="256"></canvas> |
| michael@0 | 79 | </body> |
| michael@0 | 80 | |
| michael@0 | 81 | </html> |
