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1 <!-- |
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2 Copyright (c) 2011 The Chromium Authors. All rights reserved. |
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3 Use of this source code is governed by a BSD-style license that can be |
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4 found in the LICENSE file. |
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5 --> |
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6 <!DOCTYPE html> |
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7 <html> |
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8 <head> |
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9 <meta charset="utf-8"> |
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10 <title>GLSL atan-xy function test</title> |
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11 <link rel="stylesheet" href="../../../resources/js-test-style.css"/> |
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12 <link rel="stylesheet" href="../../resources/glsl-feature-tests.css"/> |
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13 <script src="../../../resources/js-test-pre.js"></script> |
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14 <script src="../../resources/webgl-test.js"> </script> |
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15 <script src="../../resources/webgl-test-utils.js"> </script> |
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16 <script src="../../resources/glsl-generator.js"> </script> |
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17 </head> |
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18 <body> |
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19 <div id="description"></div> |
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20 <div id="console"></div> |
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21 <script> |
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22 |
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23 var piConstants = [ |
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24 "const float kPI = 3.14159265358979323846;", |
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25 "const float kHalfPI = (kPI * 0.5);", |
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26 "const float k2PI = (kPI * 2.0);" |
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27 ].join("\n"); |
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28 |
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29 var kPI = Math.PI; |
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30 var kHalfPI = Math.PI * 0.5; |
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31 var k2PI = Math.PI * 2.0; |
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32 var atan2 = Math.atan2; // shorthand |
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33 |
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34 GLSLGenerator.runReferenceImageTest({ |
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35 feature: "atan", |
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36 args: "$(type) y, $(type) x", |
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37 testFunc: "$(func)($(type), $(type))", |
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38 gridRes: 8, |
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39 tolerance: 5, |
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40 extra: piConstants, |
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41 tests: [ |
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42 { |
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43 source: ["$(output) = vec4(", |
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44 " $(func)($(input).x + 0.1, $(input).y) / k2PI + 0.5,", |
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45 " 0,", |
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46 " 0,", |
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47 " 1);"].join("\n"), |
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48 generator: function(x, y, z, w) { |
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49 return [ atan2(x + 0.1, y) / k2PI + 0.5, |
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50 0, |
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51 0, |
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52 1 ]; |
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53 }, |
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54 }, |
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55 { |
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56 source: ["$(output) = vec4(", |
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57 " $(func)($(input).xy + vec2(0.1, 0.1), $(input).yx) / ", |
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58 " k2PI + vec2(0.5, 0.5),", |
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59 " 0, 1);"].join("\n"), |
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60 generator: function(x, y, z, w) { |
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61 return [ atan2(x + 0.1, y) / k2PI + 0.5, |
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62 atan2(y + 0.1, x) / k2PI + 0.5, |
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63 0, |
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64 1 ]; |
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65 }, |
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66 }, |
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67 { |
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68 source: ["$(output) = vec4(", |
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69 " $(func)($(input).xyz + vec3(0.1, 0.1, 0.1), $(input).yzx) / ", |
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70 " k2PI + vec3(0.5, 0.5, 0.5),", |
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71 " 1);"].join("\n"), |
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72 generator: function(x, y, z, w) { |
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73 return [ atan2(x + 0.1, y) / k2PI + 0.5, |
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74 atan2(y + 0.1, z) / k2PI + 0.5, |
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75 atan2(z + 0.1, x) / k2PI + 0.5, |
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76 1 ]; |
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77 }, |
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78 }, |
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79 { |
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80 source: ["$(output) = ", |
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81 " $(func)($(input) + vec4(0.1, 0.1, 0.1, 0.1), $(input).wzyx) / ", |
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82 " k2PI + vec4(0.5, 0.5, 0.5, 0.5);", |
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83 ].join("\n"), |
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84 generator: function(x, y, z, w) { |
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85 return [ atan2(x + 0.1, w) / k2PI + 0.5, |
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86 atan2(y + 0.1, z) / k2PI + 0.5, |
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87 atan2(z + 0.1, y) / k2PI + 0.5, |
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88 atan2(w + 0.1, x) / k2PI + 0.5 ]; |
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89 }, |
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90 }, |
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91 ] |
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92 }); |
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93 successfullyParsed = true; |
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94 </script> |
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95 </body> |
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96 </html> |
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97 |