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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>GLSL atan function 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 <script src="../../resources/glsl-generator.js"> </script> | |
| 17 </head> | |
| 18 <body> | |
| 19 <div id="description"></div> | |
| 20 <div id="console"></div> | |
| 21 <script> | |
| 22 | |
| 23 var piConstants = [ | |
| 24 "const float kPI = 3.14159265358979323846;", | |
| 25 "const float kHalfPI = (kPI * 0.5);", | |
| 26 "const float k2PI = (kPI * 2.0);" | |
| 27 ].join("\n"); | |
| 28 | |
| 29 var atanImplementation = [ | |
| 30 "float atan_impl(float value) {", | |
| 31 " float atan_value = 0.0;", | |
| 32 " float scale = 1.0;", | |
| 33 " float sign = 1.0;", | |
| 34 "", | |
| 35 " if (value < 0.0) {", | |
| 36 " sign = -1.0;", | |
| 37 " value = -value;", | |
| 38 " }", | |
| 39 "", | |
| 40 " bool value_le_1 = value <= 1.0;", | |
| 41 " value = value_le_1 ? value : 1.0 / value;", | |
| 42 "", | |
| 43 " // Use Taylors series expansion for atan", | |
| 44 " for(int ii = 1; ii < 8; ii += 2) {", | |
| 45 " atan_value += scale * pow(value, float(ii)) / float(ii);", | |
| 46 " scale = -scale;", | |
| 47 " }", | |
| 48 "", | |
| 49 " return value_le_1 ? sign * atan_value : sign * (kHalfPI - atan_value);", | |
| 50 "}", | |
| 51 ].join("\n"); | |
| 52 | |
| 53 GLSLGenerator.runFeatureTest({ | |
| 54 feature: "atan", | |
| 55 args: "$(type) value", | |
| 56 baseArgs: "value$(field)", | |
| 57 testFunc: "$(func)($(type))", | |
| 58 emuFunc: [ | |
| 59 atanImplementation, | |
| 60 "", | |
| 61 "#define $(func)_base(value) atan_impl(value)" | |
| 62 ].join("\n"), | |
| 63 gridRes: 8, | |
| 64 tolerance: 4, | |
| 65 extra: piConstants, | |
| 66 tests: [ | |
| 67 ["$(output) = vec4(", | |
| 68 " $(func)($(input).x * 8.0 - 4.0) / k2PI + 0.5,", | |
| 69 " 0.5,", | |
| 70 " 0,", | |
| 71 " 1);"].join("\n"), | |
| 72 ["$(output) = vec4(", | |
| 73 " $(func)($(input).xy * 8.0 - vec2(4, 4)) / k2PI + vec2(0.5, 0.5),", | |
| 74 " 0, 1);"].join("\n"), | |
| 75 ["$(output) = vec4(", | |
| 76 " $(func)($(input).xyz * 8.0 - vec3(4, 4, 4)) / k2PI + vec3(0.5, 0.5, 0.
5),", | |
| 77 | |
| 78 " 1);"].join("\n"), | |
| 79 ["$(output) = ", | |
| 80 " $(func)($(input) * 8.0 - vec4(4, 4, 4, 4)) / k2PI + vec4(0.5, 0.5, 0.5
, 0.5);", | |
| 81 ].join("\n") | |
| 82 ] | |
| 83 }); | |
| 84 successfullyParsed = true; | |
| 85 </script> | |
| 86 </body> | |
| 87 </html> | |
| 88 | |
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Chromium Code Reviews
Issue 9360034:
Remove everthing except conformance tests in the deps/third_party/webgl (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/