| Index: conformance/glsl/functions/glsl-function-atan-xy.html
|
| ===================================================================
|
| --- conformance/glsl/functions/glsl-function-atan-xy.html (revision 0)
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| +++ conformance/glsl/functions/glsl-function-atan-xy.html (revision 0)
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| @@ -0,0 +1,104 @@
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| +<!--
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| +Copyright (c) 2011 The Chromium Authors. All rights reserved.
|
| +Use of this source code is governed by a BSD-style license that can be
|
| +found in the LICENSE file.
|
| + -->
|
| +<!DOCTYPE html>
|
| +<html>
|
| +<head>
|
| +<meta charset="utf-8">
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| + <title>GLSL atan-xy function test</title>
|
| + <link rel="stylesheet" href="../../../resources/js-test-style.css"/>
|
| + <link rel="stylesheet" href="../../resources/glsl-feature-tests.css"/>
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| + <script src="../../../resources/js-test-pre.js"></script>
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| + <script src="../../resources/webgl-test.js"> </script>
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| + <script src="../../resources/webgl-test-utils.js"> </script>
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| + <script src="../../resources/glsl-generator.js"> </script>
|
| +</head>
|
| +<body>
|
| +<div id="description"></div>
|
| +<div id="console"></div>
|
| +<script>
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| +
|
| +var piConstants = [
|
| + "const float kPI = 3.14159265358979323846;",
|
| + "const float kHalfPI = (kPI * 0.5);",
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| + "const float k2PI = (kPI * 2.0);"
|
| +].join("\n");
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| +
|
| +var atanImplementation = [
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| + "const float kEpsilon = 0.0001;",
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| + "",
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| + "float atan_impl(float y, float x) {",
|
| + " float atan_value = 0.0;",
|
| + " float scale = 1.0;",
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| + " float sign = 1.0;",
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| + "",
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| + " if (x > kEpsilon || abs(y) > kEpsilon) {",
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| + " if (x < 0.0 ^^ y < 0.0) {",
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| + " sign = -1.0;",
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| + " }",
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| + "",
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| + " bool y_gt_x = abs(y) < abs(x);",
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| + " float value = y_gt_x ? abs(y / x) : abs(x / y);",
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| + "",
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| + " // Use Taylors series expansion for atan",
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| + " for(int ii = 1; ii < 8; ii += 2) {",
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| + " atan_value += scale * pow(value, float(ii)) / float(ii);",
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| + " scale = -scale;",
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| + " }",
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| + "",
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| + " atan_value = (y_gt_x) ? sign * atan_value : sign * (kHalfPI - atan_value);",
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| + " }",
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| + "",
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| + " if (x < 0.0) {",
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| + " if (y < 0.0) {",
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| + " atan_value -= kHalfPI;",
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| + " } else if (y > 0.0) {",
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| + " atan_value += kHalfPI;",
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| + " }",
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| + " }",
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| + "",
|
| + " return atan_value;",
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| + "}"
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| +].join("\n");
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| +
|
| +GLSLGenerator.runFeatureTest({
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| + feature: "atan",
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| + args: "$(type) y, $(type) x",
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| + baseArgs: "y$(field), x$(field)",
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| + testFunc: "$(func)($(type), $(type))",
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| + emuFunc: [
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| + atanImplementation,
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| + "float $(func)_base(float y, float x) {",
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| + " return atan_impl(y, x);",
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| + "}"
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| + ].join("\n"),
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| + gridRes: 8,
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| + tolerance: 4,
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| + extra: piConstants,
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| + tests: [
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| + ["$(output) = vec4(",
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| + " $(func)($(input).x + 0.1, $(input).y) / k2PI + 0.5,",
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| + " 0,",
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| + " 0,",
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| + " 1);"].join("\n"),
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| + ["$(output) = vec4(",
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| + " $(func)($(input).xy + vec2(0.1, 0.1), $(input).yx) / ",
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| + " k2PI + vec2(0.5, 0.5),",
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| + " 0, 1);"].join("\n"),
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| + ["$(output) = vec4(",
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| + " $(func)($(input).xyz + vec3(0.1, 0.1, 0.1), $(input).yzx) / ",
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| + " k2PI + vec3(0.5, 0.5, 0.5),",
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| + " 1);"].join("\n"),
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| + ["$(output) = ",
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| + " $(func)($(input) + vec4(0.1, 0.1, 0.1, 0.1), $(input).wzyx) / ",
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| + " k2PI + vec4(0.5, 0.5, 0.5, 0.5);",
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| + ].join("\n")
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| + ]
|
| +});
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| +successfullyParsed = true;
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| +</script>
|
| +</body>
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| +</html>
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| +
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|
|
| Property changes on: conformance/glsl/functions/glsl-function-atan-xy.html
|
| ___________________________________________________________________
|
| Added: svn:executable
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| + *
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| Added: svn:eol-style
|
| + LF
|
|
|
|
|
Chromium Code Reviews
Issue 8342021:
Add webgl conformance tests r15841. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/