browser/devtools/shadereditor/test/doc_shader-order.html@6474c204b198 (annotated)
browser/devtools/shadereditor/test/doc_shader-order.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 | <!-- Any copyright is dedicated to the Public Domain. |
| michael@0 | 2 | http://creativecommons.org/publicdomain/zero/1.0/ --> |
| michael@0 | 3 | <!doctype html> |
| michael@0 | 4 | |
| michael@0 | 5 | <html> |
| michael@0 | 6 | <head> |
| michael@0 | 7 | <meta charset="utf-8"/> |
| michael@0 | 8 | <title>WebGL editor test page</title> |
| michael@0 | 9 | |
| michael@0 | 10 | <script id="shader-vs" type="x-shader/x-vertex"> |
| michael@0 | 11 | precision lowp float; |
| michael@0 | 12 | |
| michael@0 | 13 | void main(void) { |
| michael@0 | 14 | gl_Position = vec4(0, 0, 0, 1); // I'm a vertex shader! |
| michael@0 | 15 | } |
| michael@0 | 16 | </script> |
| michael@0 | 17 | |
| michael@0 | 18 | <script id="shader-fs" type="x-shader/x-fragment"> |
| michael@0 | 19 | precision lowp float; |
| michael@0 | 20 | varying vec3 vFragmentColor; |
| michael@0 | 21 | |
| michael@0 | 22 | void main(void) { |
| michael@0 | 23 | gl_FragColor = vec4(1, 0, 0, 1); // I'm a fragment shader! |
| michael@0 | 24 | } |
| michael@0 | 25 | </script> |
| michael@0 | 26 | </head> |
| michael@0 | 27 | |
| michael@0 | 28 | <body> |
| michael@0 | 29 | <canvas width="512" height="512"></canvas> |
| michael@0 | 30 | |
| michael@0 | 31 | <script type="text/javascript;version=1.8"> |
| michael@0 | 32 | "use strict"; |
| michael@0 | 33 | |
| michael@0 | 34 | let canvas, gl; |
| michael@0 | 35 | |
| michael@0 | 36 | window.onload = function() { |
| michael@0 | 37 | canvas = document.querySelector("canvas"); |
| michael@0 | 38 | gl = canvas.getContext("webgl", { preserveDrawingBuffer: true }); |
| michael@0 | 39 | |
| michael@0 | 40 | let shaderProgram = gl.createProgram(); |
| michael@0 | 41 | let vertexShader, fragmentShader; |
| michael@0 | 42 | |
| michael@0 | 43 | // Compile and attach the shaders in a random order. The test will |
| michael@0 | 44 | // ensure that the correct vertex and fragment source is retrieved |
| michael@0 | 45 | // regardless of this crazyness. |
| michael@0 | 46 | if (Math.random() > 0.5) { |
| michael@0 | 47 | vertexShader = getShader(gl, "shader-vs"); |
| michael@0 | 48 | fragmentShader = getShader(gl, "shader-fs"); |
| michael@0 | 49 | } else { |
| michael@0 | 50 | fragmentShader = getShader(gl, "shader-fs"); |
| michael@0 | 51 | vertexShader = getShader(gl, "shader-vs"); |
| michael@0 | 52 | } |
| michael@0 | 53 | if (Math.random() > 0.5) { |
| michael@0 | 54 | gl.attachShader(shaderProgram, vertexShader); |
| michael@0 | 55 | gl.attachShader(shaderProgram, fragmentShader); |
| michael@0 | 56 | } else { |
| michael@0 | 57 | gl.attachShader(shaderProgram, fragmentShader); |
| michael@0 | 58 | gl.attachShader(shaderProgram, vertexShader); |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | gl.linkProgram(shaderProgram); |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | function getShader(gl, id) { |
| michael@0 | 65 | let script = document.getElementById(id); |
| michael@0 | 66 | let source = script.textContent; |
| michael@0 | 67 | let shader; |
| michael@0 | 68 | |
| michael@0 | 69 | if (script.type == "x-shader/x-fragment") { |
| michael@0 | 70 | shader = gl.createShader(gl.FRAGMENT_SHADER); |
| michael@0 | 71 | } else if (script.type == "x-shader/x-vertex") { |
| michael@0 | 72 | shader = gl.createShader(gl.VERTEX_SHADER); |
| michael@0 | 73 | } |
| michael@0 | 74 | |
| michael@0 | 75 | gl.shaderSource(shader, source); |
| michael@0 | 76 | gl.compileShader(shader); |
| michael@0 | 77 | |
| michael@0 | 78 | return shader; |
| michael@0 | 79 | } |
| michael@0 | 80 | </script> |
| michael@0 | 81 | </body> |
| michael@0 | 82 | |
| michael@0 | 83 | </html> |
