The Tor Browser / file comparison
comparison: browser/devtools/shadereditor/test/doc_overlapping-geometry.html
browser/devtools/shadereditor/test/doc_overlapping-geometry.html
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| 1 <!-- Any copyright is dedicated to the Public Domain. | |
| 2 http://creativecommons.org/publicdomain/zero/1.0/ --> | |
| 3 <!doctype html> | |
| 4 | |
| 5 <html> | |
| 6 <head> | |
| 7 <meta charset="utf-8"/> | |
| 8 <title>WebGL editor test page</title> | |
| 9 | |
| 10 <script id="shader-vs" type="x-shader/x-vertex"> | |
| 11 precision lowp float; | |
| 12 attribute vec3 aVertexPosition; | |
| 13 uniform float uDepth; | |
| 14 | |
| 15 void main(void) { | |
| 16 gl_Position = vec4(aVertexPosition, uDepth); | |
| 17 } | |
| 18 </script> | |
| 19 | |
| 20 <script id="shader-fs-0" type="x-shader/x-fragment"> | |
| 21 precision lowp float; | |
| 22 | |
| 23 void main(void) { | |
| 24 gl_FragColor = vec4(1.0, 1.0, 0.0, 1.0); | |
| 25 } | |
| 26 </script> | |
| 27 | |
| 28 <script id="shader-fs-1" type="x-shader/x-fragment"> | |
| 29 precision lowp float; | |
| 30 | |
| 31 void main(void) { | |
| 32 gl_FragColor = vec4(0.0, 1.0, 1.0, 1.0); | |
| 33 } | |
| 34 </script> | |
| 35 </head> | |
| 36 | |
| 37 <body> | |
| 38 <canvas id="canvas" width="128" height="128"></canvas> | |
| 39 | |
| 40 <script type="text/javascript;version=1.8"> | |
| 41 "use strict"; | |
| 42 | |
| 43 let canvas, gl; | |
| 44 let program = []; | |
| 45 let squareVerticesPositionBuffer; | |
| 46 let vertexPositionAttribute = []; | |
| 47 let depthUniform = []; | |
| 48 | |
| 49 window.onload = function() { | |
| 50 canvas = document.querySelector("canvas"); | |
| 51 gl = canvas.getContext("webgl", { preserveDrawingBuffer: true }); | |
| 52 gl.clearColor(0.0, 0.0, 0.0, 1.0); | |
| 53 | |
| 54 initProgram(0); | |
| 55 initProgram(1); | |
| 56 initBuffers(); | |
| 57 drawScene(); | |
| 58 } | |
| 59 | |
| 60 function initProgram(i) { | |
| 61 let vertexShader = getShader("shader-vs"); | |
| 62 let fragmentShader = getShader("shader-fs-" + i); | |
| 63 | |
| 64 program[i] = gl.createProgram(); | |
| 65 gl.attachShader(program[i], vertexShader); | |
| 66 gl.attachShader(program[i], fragmentShader); | |
| 67 gl.linkProgram(program[i]); | |
| 68 | |
| 69 vertexPositionAttribute[i] = gl.getAttribLocation(program[i], "aVertexPosition"); | |
| 70 gl.enableVertexAttribArray(vertexPositionAttribute[i]); | |
| 71 | |
| 72 depthUniform[i] = gl.getUniformLocation(program[i], "uDepth"); | |
| 73 } | |
| 74 | |
| 75 function getShader(id) { | |
| 76 let script = document.getElementById(id); | |
| 77 let source = script.textContent; | |
| 78 let shader; | |
| 79 | |
| 80 if (script.type == "x-shader/x-fragment") { | |
| 81 shader = gl.createShader(gl.FRAGMENT_SHADER); | |
| 82 } else if (script.type == "x-shader/x-vertex") { | |
| 83 shader = gl.createShader(gl.VERTEX_SHADER); | |
| 84 } | |
| 85 | |
| 86 gl.shaderSource(shader, source); | |
| 87 gl.compileShader(shader); | |
| 88 | |
| 89 return shader; | |
| 90 } | |
| 91 | |
| 92 function initBuffers() { | |
| 93 squareVerticesPositionBuffer = gl.createBuffer(); | |
| 94 gl.bindBuffer(gl.ARRAY_BUFFER, squareVerticesPositionBuffer); | |
| 95 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ | |
| 96 1.0, 1.0, 0.0, | |
| 97 -1.0, 1.0, 0.0, | |
| 98 1.0, -1.0, 0.0, | |
| 99 -1.0, -1.0, 0.0 | |
| 100 ]), gl.STATIC_DRAW); | |
| 101 } | |
| 102 | |
| 103 function drawScene() { | |
| 104 gl.clear(gl.COLOR_BUFFER_BIT); | |
| 105 | |
| 106 for (let i = 0; i < 2; i++) { | |
| 107 gl.bindBuffer(gl.ARRAY_BUFFER, squareVerticesPositionBuffer); | |
| 108 gl.vertexAttribPointer(vertexPositionAttribute[i], 3, gl.FLOAT, false, 0, 0); | |
| 109 | |
| 110 gl.useProgram(program[i]); | |
| 111 gl.uniform1f(depthUniform[i], i + 1); | |
| 112 gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4); | |
| 113 } | |
| 114 | |
| 115 window.requestAnimationFrame(drawScene); | |
| 116 } | |
| 117 </script> | |
| 118 </body> | |
| 119 | |
| 120 </html> |
