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| 1 <!-- |
| 2 Copyright (c) 2009 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 Big FBO Test</title> |
| 12 <link rel="stylesheet" href="../resources/js-test-style.css"/> |
| 13 <script src="../resources/desktop-gl-constants.js" type="text/javascript"></scri
pt> |
| 14 <script src="../../debug/webgl-debug.js"></script> |
| 15 <script src="../resources/js-test-pre.js"></script> |
| 16 <script src="../conformance/resources/webgl-test.js"></script> |
| 17 </head> |
| 18 <body> |
| 19 <div id="description"></div> |
| 20 <div id="console"></div> |
| 21 <script id="vshader" type="x-shader/x-vertex"> |
| 22 attribute vec4 vPosition; |
| 23 attribute vec2 texCoord0; |
| 24 uniform mat4 world; |
| 25 varying vec2 texCoord; |
| 26 void main() |
| 27 { |
| 28 gl_Position = vPosition * world; |
| 29 texCoord = texCoord0; |
| 30 } |
| 31 </script> |
| 32 |
| 33 <script id="fshader" type="x-shader/x-fragment"> |
| 34 precision mediump float; |
| 35 uniform sampler2D tex; |
| 36 varying vec2 texCoord; |
| 37 void main() |
| 38 { |
| 39 gl_FragColor = texture2D(tex, texCoord); |
| 40 } |
| 41 </script> |
| 42 <canvas id="canvas" width="1024" height="1024"> </canvas> |
| 43 <script> |
| 44 window.onload = init; |
| 45 debug("Tests the performance of using lots of large FBOs"); |
| 46 |
| 47 function init() { |
| 48 if (confirm( |
| 49 "after clicking ok your machine may be come unresponsive or crash")) { |
| 50 main(); |
| 51 } else { |
| 52 debug("cancelled"); |
| 53 } |
| 54 } |
| 55 |
| 56 function main() { |
| 57 debug(""); |
| 58 debug("Canvas.getContext"); |
| 59 var g_worldLoc; |
| 60 var g_texLoc; |
| 61 var g_textures = []; |
| 62 gl = initWebGL("canvas", "vshader", "fshader", [ "vPosition", "texCoord0"], [
0, 0, 0, 1 ], 1); |
| 63 if (!gl) { |
| 64 testFailed("context does not exist"); |
| 65 } else { |
| 66 testPassed("context exists"); |
| 67 |
| 68 debug(""); |
| 69 debug("Checking for out of memory handling."); |
| 70 |
| 71 var size = gl.getParameter(gl.MAX_RENDERBUFFER_SIZE); |
| 72 debug("max render buffer size: " + size); |
| 73 size = size / 2; |
| 74 debug("size used: " + size); |
| 75 |
| 76 var allocateFramebuffers = true; |
| 77 var intervalId = 0; |
| 78 var count = 0; |
| 79 |
| 80 WebGLDebugUtils.init(gl); |
| 81 |
| 82 function createFBO() { |
| 83 var tex = gl.createTexture(); |
| 84 gl.bindTexture(gl.TEXTURE_2D, tex); |
| 85 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); |
| 86 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); |
| 87 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); |
| 88 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); |
| 89 gl.texImage2D(gl.TEXTURE_2D, |
| 90 0, // level |
| 91 gl.RGBA, // internalFormat |
| 92 size, // width |
| 93 size, // height |
| 94 0, // border |
| 95 gl.RGBA, // format |
| 96 gl.UNSIGNED_BYTE, // type |
| 97 null); // data |
| 98 var fb = gl.createFramebuffer(); |
| 99 gl.bindFramebuffer(gl.FRAMEBUFFER, fb); |
| 100 gl.framebufferTexture2D( |
| 101 gl.FRAMEBUFFER, |
| 102 gl.COLOR_ATTACHMENT0, |
| 103 gl.TEXTURE_2D, |
| 104 tex, |
| 105 0); |
| 106 var status = gl.checkFramebufferStatus(gl.FRAMEBUFFER); |
| 107 if (status != gl.FRAMEBUFFER_COMPLETE) { |
| 108 testFailed("gl.checkFramebufferStatus() returned " + WebGLDebugUtils.glE
numToString(status)); |
| 109 return; |
| 110 } |
| 111 var err = gl.getError(); |
| 112 if (err != gl.NO_ERROR) { |
| 113 if (err != gl.OUT_OF_MEMORY) { |
| 114 testFailed("gl.getError returned " + err); |
| 115 } |
| 116 return; |
| 117 } |
| 118 return { fb: fb, tex: tex }; |
| 119 } |
| 120 |
| 121 gl.disable(gl.DEPTH_TEST); |
| 122 |
| 123 var maxFBOs = 2; |
| 124 for (var ii = 0; ii < maxFBOs; ++ii) { |
| 125 createFBO(); |
| 126 var t = createFBO(); |
| 127 if (!t) { |
| 128 break; |
| 129 } |
| 130 tex = t.tex; |
| 131 fb = t.fb; |
| 132 |
| 133 gl.bindFramebuffer(gl.FRAMEBUFFER, fb); |
| 134 gl.scissor(0, 0, size, size); |
| 135 gl.clearColor(0, ii / maxFBOs, 1 - ii / maxFBOs, 1); |
| 136 gl.clear(gl.COLOR_BUFFER_BIT); |
| 137 g_textures.push(tex); |
| 138 } |
| 139 |
| 140 debug("fbos allocated:" + g_textures.length); |
| 141 gl.scissor(0, 0, 1024, 1024); |
| 142 gl.bindFramebuffer(gl.FRAMEBUFFER, null); |
| 143 |
| 144 var vertexObject = gl.createBuffer(); |
| 145 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); |
| 146 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ |
| 147 -1,1,0, 1,1,0, -1,-1,0, |
| 148 -1,-1,0, 1,1,0, 1,-1,0 |
| 149 ]), gl.STATIC_DRAW); |
| 150 gl.enableVertexAttribArray(0); |
| 151 gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); |
| 152 |
| 153 var vertexObject = gl.createBuffer(); |
| 154 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); |
| 155 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0, 1,0, 0,1, |
| 156 0,1, 1,0, 1,1 |
| 157 ]), gl.STATIC_DRAW); |
| 158 gl.enableVertexAttribArray(1); |
| 159 gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 0, 0); |
| 160 |
| 161 g_texLoc = gl.getUniformLocation(gl.program, "tex"); |
| 162 gl.uniform1i(g_texLoc, 0); |
| 163 g_worldLoc = gl.getUniformLocation(gl.program, "world"); |
| 164 gl.uniformMatrix4fv(g_worldLoc, false, [ |
| 165 0, 0, 0, 0, |
| 166 0, 0, 0, 0, |
| 167 0, 0, 1, 0, |
| 168 0, 0, 0, 1]); |
| 169 |
| 170 setInterval(render, 1000/60); |
| 171 } |
| 172 |
| 173 var g_angle = 0; |
| 174 var g_texIndex = 0; |
| 175 function render() { |
| 176 g_angle += 0.1; |
| 177 g_texIndex++; |
| 178 if (g_texIndex >= g_textures.length) { |
| 179 g_texIndex = 0; |
| 180 } |
| 181 gl.bindTexture(gl.TEXTURE_2D, g_textures[g_texIndex]); |
| 182 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); |
| 183 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); |
| 184 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR); |
| 185 gl.uniformMatrix4fv(g_worldLoc, false, rotationZ(g_angle)); |
| 186 gl.clearColor(1,0,0,1); |
| 187 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| 188 gl.drawArrays(gl.TRIANGLES, 0, 6); |
| 189 } |
| 190 } |
| 191 |
| 192 /** |
| 193 * Creates a 4-by-4 matrix which rotates around the z-axis by the given angle. |
| 194 * @param {number} angle The angle by which to rotate (in radians). |
| 195 * @return {!o3djs.math.Matrix4} The rotation matrix. |
| 196 */ |
| 197 function rotationZ(angle) { |
| 198 var c = Math.cos(angle); |
| 199 var s = Math.sin(angle); |
| 200 |
| 201 return [ |
| 202 c, s, 0, 0, |
| 203 -s, c, 0, 0, |
| 204 0, 0, 1, 0, |
| 205 0, 0, 0, 1 |
| 206 ]; |
| 207 }; |
| 208 |
| 209 debug(""); |
| 210 successfullyParsed = true; |
| 211 </script> |
| 212 <script> |
| 213 </script> |
| 214 |
| 215 </body> |
| 216 </html> |
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Chromium Code Reviews
Issue 8342021:
Add webgl conformance tests r15841. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/
