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comparison: content/canvas/test/webgl-conformance/conformance/glsl/misc/glsl-vertex-branch.html
content/canvas/test/webgl-conformance/conformance/glsl/misc/glsl-vertex-branch.html
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:19599a3cf972 |
|---|---|
| 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> | |
| 7 <html> | |
| 8 <head> | |
| 9 <meta charset="utf-8"> | |
| 10 <title>GLSL function nodes Test</title> | |
| 11 <link rel="stylesheet" href="../../../resources/js-test-style.css"/> | |
| 12 <link rel="stylesheet" href="../../resources/glsl-feature-tests.css"/> | |
| 13 <script src="../../../resources/js-test-pre.js"></script> | |
| 14 <script src="../../resources/webgl-test.js"> </script> | |
| 15 <script src="../../resources/webgl-test-utils.js"> </script> | |
| 16 | |
| 17 <script id="vshaderNoBranch", type="x-shader/x-vertex"> | |
| 18 attribute vec3 aPosition; | |
| 19 uniform float redIntensity; | |
| 20 | |
| 21 varying vec4 vColor; | |
| 22 | |
| 23 float MADBug(float paramValue) { | |
| 24 float localVar = 1.0; | |
| 25 return 0.25 * ceil(localVar) + paramValue; | |
| 26 } | |
| 27 | |
| 28 void main(void) { | |
| 29 gl_Position = vec4(aPosition, 1.0); | |
| 30 vColor = vec4(MADBug(redIntensity), 0., 0., 1.); | |
| 31 } | |
| 32 </script> | |
| 33 | |
| 34 <script id="vshaderBranch", type="x-shader/x-vertex"> | |
| 35 attribute vec3 aPosition; | |
| 36 uniform float redIntensity; | |
| 37 | |
| 38 varying vec4 vColor; | |
| 39 | |
| 40 float MADBug(float paramValue) { | |
| 41 float localVar = 1.0; | |
| 42 return 0.25 * ceil(localVar) + paramValue; | |
| 43 } | |
| 44 | |
| 45 void main(void) { | |
| 46 float condition = 42.; | |
| 47 if (condition == 0.) {} | |
| 48 gl_Position = vec4(aPosition, 1.0); | |
| 49 vColor = vec4(MADBug(redIntensity), 0., 0., 1.); | |
| 50 } | |
| 51 </script> | |
| 52 | |
| 53 <script id="fshader", type="x-shader/x-fragment"> | |
| 54 #if defined(GL_ES) | |
| 55 precision mediump float; | |
| 56 #endif | |
| 57 varying vec4 vColor; | |
| 58 void main() | |
| 59 { | |
| 60 gl_FragColor = vColor; | |
| 61 } | |
| 62 </script> | |
| 63 </head> | |
| 64 <body> | |
| 65 <canvas id="canvasNoBranch" width="50" height="50"></canvas> | |
| 66 <canvas id="canvasBranch" width="50" height="50"></canvas> | |
| 67 <div id="description">This tests against a Mac driver bug related to branches | |
| 68 inside of Vertex Shaders.</div> | |
| 69 <div id="console"></div> | |
| 70 <script> | |
| 71 var width = 50; | |
| 72 var height = 50; | |
| 73 | |
| 74 function drawAndRead(canvasID, vshaderID, buffer) | |
| 75 { | |
| 76 var gl = initWebGL(canvasID, vshaderID, "fshader", ["aPosition"], [0, 0, 0, 1], 1); | |
| 77 var vertexObject = gl.createBuffer(); | |
| 78 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); | |
| 79 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -1,-1,0, 1,-1,0 ]), gl.STATIC_DRAW); | |
| 80 gl.enableVertexAttribArray(0); | |
| 81 gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); | |
| 82 | |
| 83 var loc = gl.getUniformLocation(gl.program, "redIntensity"); | |
| 84 gl.uniform1f(loc, 0.75); | |
| 85 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); | |
| 86 gl.drawArrays(gl.TRIANGLES, 0, 3); | |
| 87 gl.readPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, buffer); | |
| 88 if (gl.getError() != gl.NO_ERROR) | |
| 89 return false; | |
| 90 return true; | |
| 91 } | |
| 92 | |
| 93 function compareRendering(buffer1, buffer2, tol) | |
| 94 { | |
| 95 for (var i = 0; i < width * height * 4; ++i) { | |
| 96 if (Math.abs(buffer1[i] - buffer2[i]) > tol) | |
| 97 return false; | |
| 98 } | |
| 99 return true; | |
| 100 } | |
| 101 | |
| 102 function init() | |
| 103 { | |
| 104 if (window.initNonKhronosFramework) { | |
| 105 window.initNonKhronosFramework(false); | |
| 106 } | |
| 107 | |
| 108 description("tests vertex shader with branch"); | |
| 109 | |
| 110 var bufBranch = new Uint8Array(width * height * 4); | |
| 111 var bufNoBranch = new Uint8Array(width * height * 4); | |
| 112 | |
| 113 if (drawAndRead("canvasBranch", "vshaderBranch", bufBranch) == false || | |
| 114 drawAndRead("canvasNoBranch", "vshaderNoBranch", bufNoBranch) == false) { | |
| 115 testFailed("Setup failed"); | |
| 116 } else { | |
| 117 if (compareRendering(bufBranch, bufNoBranch, 4) == false) | |
| 118 testFailed("Rendering results are different"); | |
| 119 else | |
| 120 testPassed("Rendering results are the same"); | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 init(); | |
| 125 successfullyParsed = true; | |
| 126 </script> | |
| 127 <script>finishTest();</script> | |
| 128 </body> | |
| 129 </html> | |
| 130 |
