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| 1 <!-- |
| 2 |
| 3 /* |
| 4 ** Copyright (c) 2012 The Khronos Group Inc. |
| 5 ** |
| 6 ** Permission is hereby granted, free of charge, to any person obtaining a |
| 7 ** copy of this software and/or associated documentation files (the |
| 8 ** "Materials"), to deal in the Materials without restriction, including |
| 9 ** without limitation the rights to use, copy, modify, merge, publish, |
| 10 ** distribute, sublicense, and/or sell copies of the Materials, and to |
| 11 ** permit persons to whom the Materials are furnished to do so, subject to |
| 12 ** the following conditions: |
| 13 ** |
| 14 ** The above copyright notice and this permission notice shall be included |
| 15 ** in all copies or substantial portions of the Materials. |
| 16 ** |
| 17 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 18 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 19 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 20 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 21 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 22 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 23 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| 24 */ |
| 25 |
| 26 --> |
| 27 |
| 28 <!DOCTYPE html> |
| 29 <html> |
| 30 <head> |
| 31 <meta charset="utf-8"> |
| 32 <title>WebGL Program Conformance Tests</title> |
| 33 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 34 <script src="../../resources/desktop-gl-constants.js" type="text/javascript"></s
cript> |
| 35 <script src="../../resources/js-test-pre.js"></script> |
| 36 <script src="../resources/webgl-test.js"></script> |
| 37 </head> |
| 38 <body> |
| 39 <div id="description"></div> |
| 40 <div id="console"></div> |
| 41 <canvas id="canvas" width="2" height="2"> </canvas> |
| 42 <script id="vertexShader" language="x-shader/x-vertex"> |
| 43 attribute vec4 ATTR0; |
| 44 void main() |
| 45 { |
| 46 gl_Position = ATTR0; |
| 47 } |
| 48 </script> |
| 49 <script id="fragmentShader" language="x-shader/x-fragment"> |
| 50 precision mediump float; |
| 51 void main() |
| 52 { |
| 53 float _Intensity = exp2(gl_FragCoord.w); |
| 54 if (_Intensity < 0.5) { |
| 55 discard; |
| 56 } |
| 57 gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); |
| 58 } |
| 59 </script> |
| 60 <script> |
| 61 description('Regression test for crash in Mac OS AMD OpenGL driver related to us
e of discard in fragment shader.<br><br>More specifically, triggering the crash
seems to require examination of gl_FragCoord.w, use of exp2, and a call to disca
rd in the fragment shader. Thanks to Sheheryar Zakaria and Michael Braithwaite a
t Turbulenz for the original test case.<br><a href="https://bugs.webkit.org/show
_bug.cgi?id=73932">WebKit bug 73932</a><br>'); |
| 62 |
| 63 debug(""); |
| 64 |
| 65 var gl = create3DContext(document.getElementById("canvas")); |
| 66 if (!gl) { |
| 67 testFailed("context does not exist"); |
| 68 } else { |
| 69 testPassed("context exists"); |
| 70 } |
| 71 |
| 72 debug(""); |
| 73 |
| 74 var vertexShaderSource = document.getElementById("vertexShader").text; |
| 75 var fragmentShaderSource = document.getElementById("fragmentShader").text; |
| 76 var vertexShader = gl.createShader(gl.VERTEX_SHADER); |
| 77 gl.shaderSource(vertexShader, vertexShaderSource); |
| 78 gl.compileShader(vertexShader); |
| 79 var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER); |
| 80 gl.shaderSource(fragmentShader, fragmentShaderSource); |
| 81 gl.compileShader(fragmentShader); |
| 82 var program = gl.createProgram(); |
| 83 gl.attachShader(program, vertexShader); |
| 84 gl.attachShader(program, fragmentShader); |
| 85 |
| 86 gl.bindAttribLocation(program, 0, "ATTR0"); |
| 87 |
| 88 gl.linkProgram(program); |
| 89 |
| 90 var linked = gl.getProgramParameter(program, gl.LINK_STATUS); |
| 91 if (linked) { |
| 92 testPassed("Program linked successfully"); |
| 93 } else { |
| 94 testFailed("Program failed to link"); |
| 95 return; |
| 96 } |
| 97 |
| 98 // Crash occurs here on affected machines |
| 99 gl.useProgram(program); |
| 100 |
| 101 // In some browsers, such as Chrome, the above crash only causes a |
| 102 // lost context event to be dispatched, and not synchronously. To verify |
| 103 // that everything worked, clear and read back the frame buffer. |
| 104 gl.clearColor(1.0, 0.0, 0.0, 1.0); |
| 105 gl.clear(gl.COLOR_BUFFER_BIT); |
| 106 var pixels = new Uint8Array(4); |
| 107 gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, pixels); |
| 108 if (pixels[0] == 255 && |
| 109 pixels[1] == 0 && |
| 110 pixels[2] == 0 && |
| 111 pixels[3] == 255) { |
| 112 testPassed("useProgram, clear and readback executed successfully"); |
| 113 } else { |
| 114 testFailed("color was (" + |
| 115 pixels[0] + ", " + pixels[1] + ", " + pixels[2] + ", " + pixels[3] + |
| 116 "), should be (255, 0, 0, 255)"); |
| 117 } |
| 118 |
| 119 successfullyParsed = true; |
| 120 </script> |
| 121 <script src="../../resources/js-test-post.js"></script> |
| 122 |
| 123 </body> |
| 124 </html> |
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Chromium Code Reviews
Issue 10399113:
Roll webgl conformance tests to r17874: part 2, adding r17874 (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/