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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> |
| 7 <html> |
| 8 <head> |
| 9 <meta charset="utf-8"> |
| 10 <title>WebGL OES_texture_float Conformance Tests</title> |
| 11 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 12 <script src="../../resources/desktop-gl-constants.js" type="text/javascript"></s
cript> |
| 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 </head> |
| 17 <body> |
| 18 <div id="description"></div> |
| 19 <canvas id="canvas" style="width: 50px; height: 50px;"> </canvas> |
| 20 <div id="console"></div> |
| 21 <!-- Shaders for testing floating-point textures --> |
| 22 <script id="testFragmentShader" type="x-shader/x-fragment"> |
| 23 precision mediump float; |
| 24 uniform sampler2D tex; |
| 25 varying vec2 texCoord; |
| 26 void main() |
| 27 { |
| 28 vec4 color = texture2D(tex, texCoord); |
| 29 if (abs(color.r - 10000.0) + |
| 30 abs(color.g - 10000.0) + |
| 31 abs(color.b - 10000.0) + |
| 32 abs(color.a - 10000.0) < 8.0) { |
| 33 gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0); |
| 34 } else { |
| 35 gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); |
| 36 } |
| 37 } |
| 38 </script> |
| 39 <!-- Shaders for testing floating-point render targets --> |
| 40 <script id="positionVertexShader" type="x-shader/x-vertex"> |
| 41 attribute vec4 vPosition; |
| 42 void main() |
| 43 { |
| 44 gl_Position = vPosition; |
| 45 } |
| 46 </script> |
| 47 <script id="floatingPointFragmentShader" type="x-shader/x-fragment"> |
| 48 void main() |
| 49 { |
| 50 gl_FragColor = vec4(10000.0, 10000.0, 10000.0, 10000.0); |
| 51 } |
| 52 </script> |
| 53 <script> |
| 54 description("This test verifies the functionality of the OES_texture_float exten
sion, if it is available."); |
| 55 |
| 56 debug(""); |
| 57 |
| 58 var wtu = WebGLTestUtils; |
| 59 var canvas = document.getElementById("canvas"); |
| 60 var gl = create3DContext(canvas); |
| 61 |
| 62 if (!gl) { |
| 63 testFailed("WebGL context does not exist"); |
| 64 } else { |
| 65 testPassed("WebGL context exists"); |
| 66 |
| 67 var texturedShaders = [ |
| 68 wtu.setupSimpleTextureVertexShader(gl), |
| 69 wtu.loadShaderFromScript(gl, "testFragmentShader") |
| 70 ]; |
| 71 var testProgram = |
| 72 wtu.setupProgram(gl, |
| 73 texturedShaders, |
| 74 ['vPosition', 'texCoord0'], |
| 75 [0, 1]); |
| 76 var quadParameters = wtu.setupUnitQuad(gl, 0, 1); |
| 77 |
| 78 // First verify that allocation of floating-point textures fails if |
| 79 // the extension has not been enabled yet. |
| 80 runTextureCreationTest(testProgram, false); |
| 81 |
| 82 if (!gl.getExtension("OES_texture_float")) { |
| 83 testPassed("No OES_texture_float support -- this is legal"); |
| 84 } else { |
| 85 testPassed("Successfully enabled OES_texture_float extension"); |
| 86 runTextureCreationTest(testProgram, true); |
| 87 runRenderTargetTest(testProgram); |
| 88 runUniqueObjectTest(); |
| 89 } |
| 90 } |
| 91 |
| 92 // Needs to be global for shouldBe to see it. |
| 93 var pixels; |
| 94 |
| 95 function allocateTexture() |
| 96 { |
| 97 var texture = gl.createTexture(); |
| 98 gl.bindTexture(gl.TEXTURE_2D, texture); |
| 99 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); |
| 100 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); |
| 101 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); |
| 102 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); |
| 103 glErrorShouldBe(gl, gl.NO_ERROR, "texture parameter setup should succeed"); |
| 104 return texture; |
| 105 } |
| 106 |
| 107 function checkRenderingResults() |
| 108 { |
| 109 pixels = new Uint8Array(4); |
| 110 gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, pixels); |
| 111 // Outputs green if OK, red if not. |
| 112 shouldBe("pixels[0]", "0"); |
| 113 shouldBe("pixels[1]", "255"); |
| 114 shouldBe("pixels[2]", "0"); |
| 115 shouldBe("pixels[3]", "255"); |
| 116 } |
| 117 |
| 118 function runTextureCreationTest(testProgram, extensionEnabled) |
| 119 { |
| 120 var expectFailure = !extensionEnabled; |
| 121 |
| 122 var texture = allocateTexture(); |
| 123 // Generate data. |
| 124 var width = 2; |
| 125 var height = 2; |
| 126 var numberOfChannels = 4; |
| 127 var data = new Float32Array(width * height * numberOfChannels); |
| 128 for (var ii = 0; ii < data.length; ++ii) { |
| 129 data[ii] = 10000; |
| 130 } |
| 131 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.FLOAT
, data); |
| 132 if (expectFailure) { |
| 133 glErrorShouldBe(gl, gl.INVALID_ENUM, "floating-point texture allocation
must be disallowed if OES_texture_float isn't enabled"); |
| 134 return; |
| 135 } else { |
| 136 glErrorShouldBe(gl, gl.NO_ERROR, "floating-point texture allocation shou
ld succeed if OES_texture_float is enabled"); |
| 137 } |
| 138 // Verify that the texture actually works for sampling and contains the expe
cted data. |
| 139 gl.uniform1i(gl.getUniformLocation(testProgram, "tex"), 0); |
| 140 wtu.drawQuad(gl); |
| 141 checkRenderingResults(); |
| 142 } |
| 143 |
| 144 function runRenderTargetTest(testProgram) |
| 145 { |
| 146 var texture = allocateTexture(); |
| 147 var width = 2; |
| 148 var height = 2; |
| 149 var numberOfChannels = 4; |
| 150 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.FLOAT
, null); |
| 151 glErrorShouldBe(gl, gl.NO_ERROR, "floating-point texture allocation should s
ucceed if OES_texture_float is enabled"); |
| 152 |
| 153 // Use this texture as a render target. |
| 154 var fbo = gl.createFramebuffer(); |
| 155 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); |
| 156 gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D,
texture, 0); |
| 157 gl.bindTexture(gl.TEXTURE_2D, null); |
| 158 shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLE
TE"); |
| 159 // While strictly speaking it is probably legal for a WebGL implementation t
o support |
| 160 // floating-point textures but not as attachments to framebuffer objects, an
y such |
| 161 // implementation is so poor that it arguably should not advertise support f
or the |
| 162 // OES_texture_float extension. For this reason the conformance test require
s that the |
| 163 // framebuffer is complete here. |
| 164 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) |
| 165 return; |
| 166 |
| 167 var shaders = [ |
| 168 wtu.loadShaderFromScript(gl, "positionVertexShader"), |
| 169 wtu.loadShaderFromScript(gl, "floatingPointFragmentShader") |
| 170 ]; |
| 171 var renderProgram = |
| 172 wtu.setupProgram(gl, |
| 173 shaders, |
| 174 ['vPosition'], |
| 175 [0]); |
| 176 wtu.drawQuad(gl); |
| 177 glErrorShouldBe(gl, gl.NO_ERROR, "rendering to floating-point texture should
succeed"); |
| 178 |
| 179 // Now sample from the floating-point texture and verify we got the correct
values. |
| 180 gl.bindFramebuffer(gl.FRAMEBUFFER, null); |
| 181 gl.bindTexture(gl.TEXTURE_2D, texture); |
| 182 gl.useProgram(testProgram); |
| 183 gl.uniform1i(gl.getUniformLocation(testProgram, "tex"), 0); |
| 184 wtu.drawQuad(gl); |
| 185 glErrorShouldBe(gl, gl.NO_ERROR, "rendering from floating-point texture shou
ld succeed"); |
| 186 checkRenderingResults(); |
| 187 } |
| 188 |
| 189 function attemptToForceGC() |
| 190 { |
| 191 var holderArray = []; |
| 192 var tempArray; |
| 193 window.tempArray = holderArray; |
| 194 for (var i = 0; i < 12; ++i) { |
| 195 tempArray = []; |
| 196 for (var j = 0; j < 1024 * 1024; ++j) { |
| 197 tempArray.push(0); |
| 198 } |
| 199 holderArray.push(tempArray); |
| 200 } |
| 201 window.tempArray = null; |
| 202 } |
| 203 |
| 204 function runUniqueObjectTest() |
| 205 { |
| 206 debug("Testing that getExtension() returns the same object each time"); |
| 207 gl.getExtension("OES_texture_float").myProperty = 2; |
| 208 if (window.GCController) { |
| 209 window.GCController.collect(); |
| 210 } else if (window.opera && window.opera.collect) { |
| 211 window.opera.collect(); |
| 212 } else { |
| 213 attemptToForceGC(); |
| 214 } |
| 215 shouldBe('gl.getExtension("OES_texture_float").myProperty', '2'); |
| 216 } |
| 217 |
| 218 |
| 219 debug(""); |
| 220 successfullyParsed = true; |
| 221 </script> |
| 222 <script src="../../resources/js-test-post.js"></script> |
| 223 |
| 224 </body> |
| 225 </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/