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comparison: content/canvas/test/webgl-conformance/extra/out-of-bounds-uniform-array-access.html
content/canvas/test/webgl-conformance/extra/out-of-bounds-uniform-array-access.html
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| 1 <!-- | |
| 2 Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 3 Use of this source code is governed by a BSD-style license that can be | |
| 4 found in the LICENSE file. | |
| 5 --> | |
| 6 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" | |
| 7 "http://www.w3.org/TR/html4/loose.dtd"> | |
| 8 <html> | |
| 9 <head> | |
| 10 <meta charset="utf-8"> | |
| 11 <title>WebGL ouf of bounds uniform array access.</title> | |
| 12 <link rel="stylesheet" href="../resources/js-test-style.css"/> | |
| 13 <script src="../resources/js-test-pre.js"></script> | |
| 14 <script src="../conformance/resources/webgl-test-utils.js"> </script> | |
| 15 </head> | |
| 16 <body style="background: #666;"> | |
| 17 <div id="description"></div> | |
| 18 <div id="console"></div> | |
| 19 <div>elem mult: <span id="elemMultDisplay"></span></div> | |
| 20 <input type="range" id="elemMult" value="4" min="0" max="2048" style="width: 100%;"/> | |
| 21 <div>line width: <span id="lineWidthDisplay"></span></div> | |
| 22 <input type="range" id="lineWidth" value="512" min="0" max="2540" style="width: 100%;"/> | |
| 23 <canvas id="example" width="256" height="256" style="background: black;"> | |
| 24 </canvas> | |
| 25 <script id="vshader" type="x-shader/x-vertex"> | |
| 26 attribute vec4 vPosition; | |
| 27 varying vec4 v_color; | |
| 28 uniform float lineWidth; | |
| 29 uniform int elemMult; | |
| 30 uniform vec4 someArray[2]; | |
| 31 void main() | |
| 32 { | |
| 33 vec2 texcoord = vec2(vPosition.xy * 0.5 + vec2(0.5, 0.5)); | |
| 34 int index = int(texcoord.x + texcoord.y * lineWidth) * elemMult; | |
| 35 v_color = someArray[index]; | |
| 36 gl_Position = vPosition; | |
| 37 } | |
| 38 </script> | |
| 39 | |
| 40 <script id="fshader" type="x-shader/x-fragment"> | |
| 41 precision mediump float; | |
| 42 varying vec4 v_color; | |
| 43 void main() | |
| 44 { | |
| 45 gl_FragColor = v_color * vec4(1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0) + vec4(0,0,0,0.5); | |
| 46 } | |
| 47 </script> | |
| 48 <script> | |
| 49 window.onload = main; | |
| 50 debug("Tests a WebGL program that accesses out of bounds uniform array elements"); | |
| 51 | |
| 52 function main() { | |
| 53 var wtu = WebGLTestUtils; | |
| 54 var gl = wtu.create3DContext("example"); | |
| 55 var program = wtu.setupProgram( | |
| 56 gl, | |
| 57 ['vshader', 'fshader'], | |
| 58 ['vPosition'], [0]); | |
| 59 var gridRes = 255; | |
| 60 wtu.setupQuad(gl, gridRes, 0); | |
| 61 var lineWidthLoc = gl.getUniformLocation(program, "lineWidth"); | |
| 62 var elemMultLoc = gl.getUniformLocation(program, "elemMult"); | |
| 63 assertMsg(gl.getError() == gl.NO_ERROR, "Should be no errors from setup."); | |
| 64 | |
| 65 var lineWidth = 512; | |
| 66 var lineWidthElem = document.getElementById("lineWidth"); | |
| 67 var lineWidthDisplayElem = document.getElementById("lineWidthDisplay"); | |
| 68 | |
| 69 lineWidthElem.value = lineWidth; | |
| 70 | |
| 71 lineWidthElem.addEventListener('change', function(event) { | |
| 72 //console.log(event.target.value); | |
| 73 lineWidth = event.target.value; | |
| 74 draw(); | |
| 75 }, false); | |
| 76 | |
| 77 var elemMult = 4; | |
| 78 var elemMultElem = document.getElementById("elemMult"); | |
| 79 var elemMultDisplayElem = document.getElementById("elemMultDisplay"); | |
| 80 | |
| 81 elemMultElem.value = elemMult; | |
| 82 | |
| 83 elemMultElem.addEventListener('change', function(event) { | |
| 84 //console.log(event.target.value); | |
| 85 elemMult = event.target.value; | |
| 86 draw(); | |
| 87 }, false); | |
| 88 | |
| 89 draw(); | |
| 90 | |
| 91 function draw() { | |
| 92 lineWidthDisplayElem.innerText = lineWidth; | |
| 93 elemMultDisplayElem.innerText = elemMult; | |
| 94 gl.uniform1f(lineWidthLoc, lineWidth); | |
| 95 gl.uniform1i(elemMultLoc, elemMult); | |
| 96 gl.drawElements(gl.TRIANGLES, gridRes * gridRes * 6, gl.UNSIGNED_SHORT, 0); | |
| 97 } | |
| 98 | |
| 99 successfullyParsed = true; | |
| 100 } | |
| 101 | |
| 102 </script> | |
| 103 </body> | |
| 104 </html> | |
| 105 | |
| 106 |
