| OLD | NEW |
|---|
| (Empty) | |
| 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-xy 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 "const float kEpsilon = 0.0001;", |
| 31 "", |
| 32 "float atan_impl(float y, float x) {", |
| 33 " float atan_value = 0.0;", |
| 34 " float scale = 1.0;", |
| 35 " float sign = 1.0;", |
| 36 "", |
| 37 " if (x > kEpsilon || abs(y) > kEpsilon) {", |
| 38 " if (x < 0.0 ^^ y < 0.0) {", |
| 39 " sign = -1.0;", |
| 40 " }", |
| 41 "", |
| 42 " bool y_gt_x = abs(y) < abs(x);", |
| 43 " float value = y_gt_x ? abs(y / x) : abs(x / y);", |
| 44 "", |
| 45 " // Use Taylors series expansion for atan", |
| 46 " for(int ii = 1; ii < 8; ii += 2) {", |
| 47 " atan_value += scale * pow(value, float(ii)) / float(ii);", |
| 48 " scale = -scale;", |
| 49 " }", |
| 50 "", |
| 51 " atan_value = (y_gt_x) ? sign * atan_value : sign * (kHalfPI - atan_value)
;", |
| 52 " }", |
| 53 "", |
| 54 " if (x < 0.0) {", |
| 55 " if (y < 0.0) {", |
| 56 " atan_value -= kHalfPI;", |
| 57 " } else if (y > 0.0) {", |
| 58 " atan_value += kHalfPI;", |
| 59 " }", |
| 60 " }", |
| 61 "", |
| 62 " return atan_value;", |
| 63 "}" |
| 64 ].join("\n"); |
| 65 |
| 66 GLSLGenerator.runFeatureTest({ |
| 67 feature: "atan", |
| 68 args: "$(type) y, $(type) x", |
| 69 baseArgs: "y$(field), x$(field)", |
| 70 testFunc: "$(func)($(type), $(type))", |
| 71 emuFunc: [ |
| 72 atanImplementation, |
| 73 "float $(func)_base(float y, float x) {", |
| 74 " return atan_impl(y, x);", |
| 75 "}" |
| 76 ].join("\n"), |
| 77 gridRes: 8, |
| 78 tolerance: 4, |
| 79 extra: piConstants, |
| 80 tests: [ |
| 81 ["$(output) = vec4(", |
| 82 " $(func)($(input).x + 0.1, $(input).y) / k2PI + 0.5,", |
| 83 " 0,", |
| 84 " 0,", |
| 85 " 1);"].join("\n"), |
| 86 ["$(output) = vec4(", |
| 87 " $(func)($(input).xy + vec2(0.1, 0.1), $(input).yx) / ", |
| 88 " k2PI + vec2(0.5, 0.5),", |
| 89 " 0, 1);"].join("\n"), |
| 90 ["$(output) = vec4(", |
| 91 " $(func)($(input).xyz + vec3(0.1, 0.1, 0.1), $(input).yzx) / ", |
| 92 " k2PI + vec3(0.5, 0.5, 0.5),", |
| 93 " 1);"].join("\n"), |
| 94 ["$(output) = ", |
| 95 " $(func)($(input) + vec4(0.1, 0.1, 0.1, 0.1), $(input).wzyx) / ", |
| 96 " k2PI + vec4(0.5, 0.5, 0.5, 0.5);", |
| 97 ].join("\n") |
| 98 ] |
| 99 }); |
| 100 successfullyParsed = true; |
| 101 </script> |
| 102 </body> |
| 103 </html> |
| 104 |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 8342021:
Add webgl conformance tests r15841. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/