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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_001_to_008.html b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_001_to_008.html new file mode 100644 index 0000000000..05b3e5b461 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_001_to_008.html @@ -0,0 +1,135 @@ +<!DOCTYPE html> +<!-- this file is auto-generated. DO NOT EDIT. --> +<!-- +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +--> +<html> +<head> +<meta charset="utf-8"> +<title>WebGL GLSL conformance test: atan_001_to_008.html</title> +<link rel="stylesheet" href="../../../../resources/js-test-style.css" /> +<link rel="stylesheet" href="../../../../resources/ogles-tests.css" /> +<script src="../../../../js/js-test-pre.js"></script> +<script src="../../../../js/webgl-test-utils.js"></script> +<script src="../../ogles-utils.js"></script> +</head> +<body> +<canvas id="example" width="500" height="500" style="width: 16px; height: 16px;"></canvas> +<div id="description"></div> +<div id="console"></div> +</body> +<script> +"use strict"; +OpenGLESTestRunner.run({ + "tests": [ + { + "referenceProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_float_frag_xvary_ref.frag" + }, + "model": null, + "testProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_float_frag_xvary.frag" + }, + "name": "atan_float_frag_xvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_vec2_frag_xvary_ref.frag" + }, + "model": null, + "testProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_vec2_frag_xvary.frag" + }, + "name": "atan_vec2_frag_xvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_vec3_frag_xvary_ref.frag" + }, + "model": null, + "testProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_vec3_frag_xvary.frag" + }, + "name": "atan_vec3_frag_xvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_float_frag_xvaryyvary_ref.frag" + }, + "model": null, + "testProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_float_frag_xvaryyvary.frag" + }, + "name": "atan_float_frag_xvaryyvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_vec2_frag_xvaryyvary_ref.frag" + }, + "model": null, + "testProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_vec2_frag_xvaryyvary.frag" + }, + "name": "atan_vec2_frag_xvaryyvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_vec3_frag_xvaryyvary_ref.frag" + }, + "model": null, + "testProgram": { + "vertexShader": "../default/default.vert", + "fragmentShader": "atan_vec3_frag_xvaryyvary.frag" + }, + "name": "atan_vec3_frag_xvaryyvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "atan_float_vert_xvary_ref.vert", + "fragmentShader": "../default/default.frag" + }, + "model": "grid", + "testProgram": { + "vertexShader": "atan_float_vert_xvary.vert", + "fragmentShader": "../default/default.frag" + }, + "name": "atan_float_vert_xvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "atan_vec2_vert_xvary_ref.vert", + "fragmentShader": "../default/default.frag" + }, + "model": "grid", + "testProgram": { + "vertexShader": "atan_vec2_vert_xvary.vert", + "fragmentShader": "../default/default.frag" + }, + "name": "atan_vec2_vert_xvary.test.html", + "pattern": "compare" + } + ] +}); +var successfullyParsed = true; +</script> +</html> diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_009_to_012.html b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_009_to_012.html new file mode 100644 index 0000000000..201c0282cd --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_009_to_012.html @@ -0,0 +1,83 @@ +<!DOCTYPE html> +<!-- this file is auto-generated. DO NOT EDIT. --> +<!-- +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +--> +<html> +<head> +<meta charset="utf-8"> +<title>WebGL GLSL conformance test: atan_009_to_012.html</title> +<link rel="stylesheet" href="../../../../resources/js-test-style.css" /> +<link rel="stylesheet" href="../../../../resources/ogles-tests.css" /> +<script src="../../../../js/js-test-pre.js"></script> +<script src="../../../../js/webgl-test-utils.js"></script> +<script src="../../ogles-utils.js"></script> +</head> +<body> +<canvas id="example" width="500" height="500" style="width: 16px; height: 16px;"></canvas> +<div id="description"></div> +<div id="console"></div> +</body> +<script> +"use strict"; +OpenGLESTestRunner.run({ + "tests": [ + { + "referenceProgram": { + "vertexShader": "atan_vec3_vert_xvary_ref.vert", + "fragmentShader": "../default/default.frag" + }, + "model": "grid", + "testProgram": { + "vertexShader": "atan_vec3_vert_xvary.vert", + "fragmentShader": "../default/default.frag" + }, + "name": "atan_vec3_vert_xvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "atan_float_vert_xvaryyvary_ref.vert", + "fragmentShader": "../default/default.frag" + }, + "model": "grid", + "testProgram": { + "vertexShader": "atan_float_vert_xvaryyvary.vert", + "fragmentShader": "../default/default.frag" + }, + "name": "atan_float_vert_xvaryyvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "atan_vec2_vert_xvaryyvary_ref.vert", + "fragmentShader": "../default/default.frag" + }, + "model": "grid", + "testProgram": { + "vertexShader": "atan_vec2_vert_xvaryyvary.vert", + "fragmentShader": "../default/default.frag" + }, + "name": "atan_vec2_vert_xvaryyvary.test.html", + "pattern": "compare" + }, + { + "referenceProgram": { + "vertexShader": "atan_vec3_vert_xvaryyvary_ref.vert", + "fragmentShader": "../default/default.frag" + }, + "model": "grid", + "testProgram": { + "vertexShader": "atan_vec3_vert_xvaryyvary.vert", + "fragmentShader": "../default/default.frag" + }, + "name": "atan_vec3_vert_xvaryyvary.test.html", + "pattern": "compare" + } + ] +}); +var successfullyParsed = true; +</script> +</html> diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvary.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvary.frag new file mode 100644 index 0000000000..75b48dd621 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvary.frag @@ -0,0 +1,19 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + float c = 4.0 * 2.0 * (color.r - 0.5); + gl_FragColor = vec4(atan(c) / M_PI + 0.5, 0.0, 0.0, 1.0); +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvary_ref.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvary_ref.frag new file mode 100644 index 0000000000..83546d9d72 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvary_ref.frag @@ -0,0 +1,55 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + float c = 4.0 * 2.0 * (color.r - 0.5); + float atan_c = 0.0; + float scale = 1.0; + float sign = 1.0; + vec4 result; + + if(c < 0.0) + { + sign = -1.0; + c *= -1.0; + } + + if(c <= 1.0) + { + // Taylors series expansion for atan + for(int i = 1; i < 12; i += 2) + { + atan_c += scale * pow(c, float(i)) / float(i); + scale *= -1.0; + } + + result = vec4(sign * atan_c / M_PI + 0.5, 0.0, 0.0, 1.0); + } + else + { + c = 1.0 / c; + + // Taylors series expansion for atan + for(int i = 1; i < 12; i += 2) + { + atan_c += scale * pow(c, float(i)) / float(i); + scale *= -1.0; + } + + result = vec4(sign * (M_PI / 2.0 - atan_c) / M_PI + 0.5, 0.0, 0.0, 1.0); + } + + gl_FragColor = result; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvaryyvary.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvaryyvary.frag new file mode 100644 index 0000000000..20333090b1 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvaryyvary.frag @@ -0,0 +1,31 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +#ifdef GL_FRAGMENT_PRECISION_HIGH +precision highp float; +#else +precision mediump float; +#endif +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + float x = 2.0 * (color.g - 0.5); + float y = 2.0 * (color.b - 0.5); + const float epsilon = 1.0e-4; + gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0); + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x > epsilon || abs(y) > epsilon) + { + gl_FragColor = vec4(atan(y, x) / (2.0 * M_PI) + 0.5, 0.0, 0.0, 1.0); + } +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvaryyvary_ref.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvaryyvary_ref.frag new file mode 100644 index 0000000000..5c341a2a52 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_frag_xvaryyvary_ref.frag @@ -0,0 +1,71 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +#ifdef GL_FRAGMENT_PRECISION_HIGH +precision highp float; +#else +precision mediump float; +#endif +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + float x = 2.0 * (color.g - 0.5); + float y = 2.0 * (color.b - 0.5); + float atan_c = 0.0; + float scale = 1.0; + float sign = 1.0; + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + const float epsilon = 1.0e-4; + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x > epsilon || abs(y) > epsilon) + { + if(x < 0.0 ^^ y < 0.0) + { + sign = -1.0; + } + + if(abs(y) <= abs(x)) + { + float c = abs(y / x); + + // Taylors series expansion for atan + for(int i = 1; i < 12; i += 2) + { + atan_c += scale * pow(c, float(i)) / float(i); + scale *= -1.0; + } + + result = vec4(sign * atan_c / (2.0 * M_PI) + 0.5, 0.0, 0.0, 1.0); + } + else + { + float c = abs(x / y); + + // Taylors series expansion for atan + for(int i = 1; i < 12; i += 2) + { + atan_c += scale * pow(c, float(i)) / float(i); + scale *= -1.0; + } + + result = vec4(sign * (M_PI / 2.0 - atan_c) / (2.0 * M_PI) + 0.5, 0.0, 0.0, 1.0); + } + + if(x < 0.0) + if(y < 0.0) result.r -= 0.5; + else if(y > 0.0) result.r += 0.5; + } + + gl_FragColor = result; +} + diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvary.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvary.vert new file mode 100644 index 0000000000..45d4753a12 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvary.vert @@ -0,0 +1,20 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + float c = 4.0 * 2.0 * (gtf_Color.r - 0.5); + color = vec4(atan(c) / M_PI + 0.5, 0.0, 0.0, 1.0); + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvary_ref.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvary_ref.vert new file mode 100644 index 0000000000..98838d98c8 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvary_ref.vert @@ -0,0 +1,56 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + float c = 4.0 * 2.0 * (gtf_Color.r - 0.5); + float atan_c = 0.0; + float scale = 1.0; + float sign = 1.0; + vec4 result; + + if(c < 0.0) + { + sign = -1.0; + c *= -1.0; + } + + if(c <= 1.0) + { + // Taylors series expansion for atan + for(int i = 1; i < 12; i += 2) + { + atan_c += scale * pow(c, float(i)) / float(i); + scale *= -1.0; + } + + result = vec4(sign * atan_c / M_PI + 0.5, 0.0, 0.0, 1.0); + } + else + { + c = 1.0 / c; + + // Taylors series expansion for atan + for(int i = 1; i < 12; i += 2) + { + atan_c += scale * pow(c, float(i)) / float(i); + scale *= -1.0; + } + + result = vec4(sign * (M_PI / 2.0 - atan_c) / M_PI + 0.5, 0.0, 0.0, 1.0); + } + + color = result; + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvaryyvary.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvaryyvary.vert new file mode 100644 index 0000000000..6da6ba13b6 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvaryyvary.vert @@ -0,0 +1,29 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + float x = 2.0 * (gtf_Color.g - 0.5); + float y = 2.0 * (gtf_Color.b - 0.5); + const float epsilon = 1.0e-4; + color = vec4(0.0, 0.0, 0.0, 1.0); + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x > epsilon || abs(y) > epsilon) + { + color = vec4(atan(y, x) / (2.0 * M_PI) + 0.5, 0.0, 0.0, 1.0); + } + + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvaryyvary_ref.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvaryyvary_ref.vert new file mode 100644 index 0000000000..b6c2d5f4ea --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_float_vert_xvaryyvary_ref.vert @@ -0,0 +1,68 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + float x = 2.0 * (gtf_Color.g - 0.5); + float y = 2.0 * (gtf_Color.b - 0.5); + float atan_c = 0.0; + float scale = 1.0; + float sign = 1.0; + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + const float epsilon = 1.0e-4; + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x > epsilon || abs(y) > epsilon) + { + if(x < 0.0 ^^ y < 0.0) + { + sign = -1.0; + } + + if(abs(y) <= abs(x)) + { + float c = abs(y / x); + + // Taylors series expansion for atan + for(int i = 1; i < 12; i += 2) + { + atan_c += scale * pow(c, float(i)) / float(i); + scale *= -1.0; + } + + result = vec4(sign * atan_c / (2.0 * M_PI) + 0.5, 0.0, 0.0, 1.0); + } + else + { + float c = abs(x / y); + + // Taylors series expansion for atan + for(int i = 1; i < 12; i += 2) + { + atan_c += scale * pow(c, float(i)) / float(i); + scale *= -1.0; + } + + result = vec4(sign * (M_PI / 2.0 - atan_c) / (2.0 * M_PI) + 0.5, 0.0, 0.0, 1.0); + } + + if(x < 0.0) + if(y < 0.0) result.r -= 0.5; + else if(y > 0.0) result.r += 0.5; + } + + color = result; + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} + diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvary.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvary.frag new file mode 100644 index 0000000000..46d927e57c --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvary.frag @@ -0,0 +1,19 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec2 c = 4.0 * 2.0 * (color.rg - 0.5); + gl_FragColor = vec4(atan(c) / M_PI + 0.5, 0.0, 1.0); +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvary_ref.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvary_ref.frag new file mode 100644 index 0000000000..9358f869ef --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvary_ref.frag @@ -0,0 +1,115 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec2 c = 4.0 * 2.0 * (color.rg - 0.5); + vec2 atan_c = vec2(0.0); + vec2 scale = vec2(1.0); + vec2 sign = vec2(1.0); + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + + if(c[0] < 0.0) + { + sign[0] = -1.0; + c[0] *= -1.0; + } + + if(c[0] <= 1.0) + { + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * atan_c[0] / M_PI + 0.5; + } + else + { + c[0] = 1.0 / c[0]; + + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * (M_PI / 2.0 - atan_c[0]) / M_PI + 0.5; + } + + + if(c[1] < 0.0) + { + sign[1] = -1.0; + c[1] *= -1.0; + } + + if(c[1] <= 1.0) + { + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * atan_c[1] / M_PI + 0.5; + } + else + { + c[1] = 1.0 / c[1]; + + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * (M_PI / 2.0 - atan_c[1]) / M_PI + 0.5; + } + + gl_FragColor = result; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvaryyvary.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvaryyvary.frag new file mode 100644 index 0000000000..8bffcb3dad --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvaryyvary.frag @@ -0,0 +1,32 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec2 x = 2.0 * (color.gg - 0.5); + vec2 y = 2.0 * (color.bb - 0.5); + const float epsilon = 1.0e-4; + gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0); + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x[0] > epsilon || abs(y[0]) > epsilon) + { + gl_FragColor[0] = atan(y[0], x[0]) / (2.0 * M_PI) + 0.5; + } + + if(x[1] > epsilon || abs(y[1]) > epsilon) + { + gl_FragColor[1] = atan(y[1], x[1]) / (2.0 * M_PI) + 0.5; + } +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvaryyvary_ref.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvaryyvary_ref.frag new file mode 100644 index 0000000000..bfd7117d48 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_frag_xvaryyvary_ref.frag @@ -0,0 +1,133 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec2 x = 2.0 * (color.gg - 0.5); + vec2 y = 2.0 * (color.bb - 0.5); + vec2 c; + vec2 atan_c = vec2(0.0); + vec2 scale = vec2(1.0); + vec2 sign = vec2(1.0); + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + const float epsilon = 1.0e-4; + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x[0] > epsilon || abs(y[0]) > epsilon) + { + if(x[0] < 0.0 ^^ y[0] < 0.0) + { + sign[0] = -1.0; + } + + if(abs(y[0]) <= abs(x[0])) + { + c[0] = abs(y[0] / x[0]); + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * atan_c[0] / (2.0 * M_PI) + 0.5; + } + else + { + c[0] = abs(x[0] / y[0]); + + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * (M_PI / 2.0 - atan_c[0]) / (2.0 * M_PI) + 0.5; + } + + if(x[0] < 0.0) + if(y[0] < 0.0) result[0] -= 0.5; + else if(y[0] > 0.0) result[0] += 0.5; + } + + if(x[1] > epsilon || abs(y[1]) > epsilon) + { + + if(x[1] < 0.0 ^^ y[1] < 0.0) + { + sign[1] = -1.0; + } + + if(abs(y[1]) <= abs(x[1])) + { + c[1] = abs(y[1] / x[1]); + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * atan_c[1] / (2.0 * M_PI) + 0.5; + } + else + { + c[1] = abs(x[1] / y[1]); + + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * (M_PI / 2.0 - atan_c[1]) / (2.0 * M_PI) + 0.5; + } + + if(x[1] < 0.0) + if(y[1] < 0.0) result[1] -= 0.5; + else if(y[1] > 0.0) result[1] += 0.5; + } + + gl_FragColor = result; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvary.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvary.vert new file mode 100644 index 0000000000..5432f7244f --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvary.vert @@ -0,0 +1,20 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec2 c = 4.0 * 2.0 * (gtf_Color.rg - 0.5); + color = vec4(atan(c) / M_PI + 0.5, 0.0, 1.0); + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvary_ref.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvary_ref.vert new file mode 100644 index 0000000000..1ef2d5e83d --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvary_ref.vert @@ -0,0 +1,116 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec2 c = 4.0 * 2.0 * (gtf_Color.rg - 0.5); + vec2 atan_c = vec2(0.0); + vec2 scale = vec2(1.0); + vec2 sign = vec2(1.0); + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + + if(c[0] < 0.0) + { + sign[0] = -1.0; + c[0] *= -1.0; + } + + if(c[0] <= 1.0) + { + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * atan_c[0] / M_PI + 0.5; + } + else + { + c[0] = 1.0 / c[0]; + + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * (M_PI / 2.0 - atan_c[0]) / M_PI + 0.5; + } + + + if(c[1] < 0.0) + { + sign[1] = -1.0; + c[1] *= -1.0; + } + + if(c[1] <= 1.0) + { + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * atan_c[1] / M_PI + 0.5; + } + else + { + c[1] = 1.0 / c[1]; + + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * (M_PI / 2.0 - atan_c[1]) / M_PI + 0.5; + } + + color = result; + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvaryyvary.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvaryyvary.vert new file mode 100644 index 0000000000..bfa6448968 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvaryyvary.vert @@ -0,0 +1,34 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec2 x = 2.0 * (gtf_Color.gg - 0.5); + vec2 y = 2.0 * (gtf_Color.bb - 0.5); + const float epsilon = 1.0e-4; + color = vec4(0.0, 0.0, 0.0, 1.0); + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x[0] > epsilon || abs(y[0]) > epsilon) + { + color[0] = atan(y[0], x[0]) / (2.0 * M_PI) + 0.5; + } + + if(x[1] > epsilon || abs(y[1]) > epsilon) + { + color[1] = atan(y[1], x[1]) / (2.0 * M_PI) + 0.5; + } + + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvaryyvary_ref.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvaryyvary_ref.vert new file mode 100644 index 0000000000..eee41526ff --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec2_vert_xvaryyvary_ref.vert @@ -0,0 +1,133 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec2 x = 2.0 * (gtf_Color.gg - 0.5); + vec2 y = 2.0 * (gtf_Color.bb - 0.5); + vec2 c; + vec2 atan_c = vec2(0.0); + vec2 scale = vec2(1.0); + vec2 sign = vec2(1.0); + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + const float epsilon = 1.0e-4; + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x[0] > epsilon || abs(y[0]) > epsilon) + { + if(x[0] < 0.0 ^^ y[0] < 0.0) + { + sign[0] = -1.0; + } + + if(abs(y[0]) <= abs(x[0])) + { + c[0] = abs(y[0] / x[0]); + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * atan_c[0] / (2.0 * M_PI) + 0.5; + } + else + { + c[0] = abs(x[0] / y[0]); + + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * (M_PI / 2.0 - atan_c[0]) / (2.0 * M_PI) + 0.5; + } + + if(x[0] < 0.0) + if(y[0] < 0.0) result[0] -= 0.5; + else if(y[0] > 0.0) result[0] += 0.5; + } + + if(x[1] > epsilon || abs(y[1]) > epsilon) + { + if(x[1] < 0.0 ^^ y[1] < 0.0) + { + sign[1] = -1.0; + } + + if(abs(y[1]) <= abs(x[1])) + { + c[1] = abs(y[1] / x[1]); + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * atan_c[1] / (2.0 * M_PI) + 0.5; + } + else + { + c[1] = abs(x[1] / y[1]); + + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * (M_PI / 2.0 - atan_c[1]) / (2.0 * M_PI) + 0.5; + } + + if(x[1] < 0.0) + if(y[1] < 0.0) result[1] -= 0.5; + else if(y[1] > 0.0) result[1] += 0.5; + } + + color = result; + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvary.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvary.frag new file mode 100644 index 0000000000..f4101e3e59 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvary.frag @@ -0,0 +1,19 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec3 c = 4.0 * 2.0 * (color.rgb - 0.5); + gl_FragColor = vec4(atan(c) / M_PI + 0.5, 1.0); +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvary_ref.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvary_ref.frag new file mode 100644 index 0000000000..d5cfd01fa1 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvary_ref.frag @@ -0,0 +1,161 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec3 c = 4.0 * 2.0 * (color.rgb - 0.5); + vec3 atan_c = vec3(0.0); + vec3 scale = vec3(1.0); + vec3 sign = vec3(1.0); + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + + + if(c[0] < 0.0) + { + sign[0] = -1.0; + c[0] *= -1.0; + } + + if(c[0] <= 1.0) + { + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * atan_c[0] / M_PI + 0.5; + } + else + { + c[0] = 1.0 / c[0]; + + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * (M_PI / 2.0 - atan_c[0]) / M_PI + 0.5; + } + + if(c[1] < 0.0) + { + sign[1] = -1.0; + c[1] *= -1.0; + } + + if(c[1] <= 1.0) + { + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * atan_c[1] / M_PI + 0.5; + } + else + { + c[1] = 1.0 / c[1]; + + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * (M_PI / 2.0 - atan_c[1]) / M_PI + 0.5; + } + + + if(c[2] < 0.0) + { + sign[2] = -1.0; + c[2] *= -1.0; + } + + if(c[2] <= 1.0) + { + // Taylors series expansion for atan + atan_c[2] += scale[2] * pow(c[2], float(1)) / float(1); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(3)) / float(3); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(5)) / float(5); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(7)) / float(7); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(9)) / float(9); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(11)) / float(11); + scale[2] *= -1.0; + + result[2] = sign[2] * atan_c[2] / M_PI + 0.5; + } + else + { + c[2] = 1.0 / c[2]; + + // Taylors series expansion for atan + atan_c[2] += scale[2] * pow(c[2], float(1)) / float(1); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(3)) / float(3); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(5)) / float(5); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(7)) / float(7); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(9)) / float(9); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(11)) / float(11); + scale[2] *= -1.0; + + result[2] = sign[2] * (M_PI / 2.0 - atan_c[2]) / M_PI + 0.5; + } + + gl_FragColor = result; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvaryyvary.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvaryyvary.frag new file mode 100644 index 0000000000..0db560e1df --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvaryyvary.frag @@ -0,0 +1,37 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec3 x = 2.0 * (color.ggg - 0.5); + vec3 y = 2.0 * (color.bbb - 0.5); + const float epsilon = 1.0e-4; + gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0); + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x[0] > epsilon || abs(y[0]) > epsilon) + { + gl_FragColor[0] = atan(y[0], x[0]) / (2.0 * M_PI) + 0.5; + } + + if(x[1] > epsilon || abs(y[1]) > epsilon) + { + gl_FragColor[1] = atan(y[1], x[1]) / (2.0 * M_PI) + 0.5; + } + + if(x[2] > epsilon || abs(y[2]) > epsilon) + { + gl_FragColor[2] = atan(y[2], x[2]) / (2.0 * M_PI) + 0.5; + } +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvaryyvary_ref.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvaryyvary_ref.frag new file mode 100644 index 0000000000..c6b55f4a0c --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_frag_xvaryyvary_ref.frag @@ -0,0 +1,186 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec3 x = 2.0 * (color.ggg - 0.5); + vec3 y = 2.0 * (color.bbb - 0.5); + vec3 c; + vec3 atan_c = vec3(0.0); + vec3 scale = vec3(1.0); + vec3 sign = vec3(1.0); + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + const float epsilon = 1.0e-4; + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x[0] > epsilon || abs(y[0]) > epsilon) + { + if(x[0] < 0.0 ^^ y[0] < 0.0) + { + sign[0] = -1.0; + } + + if(abs(y[0]) <= abs(x[0])) + { + c[0] = abs(y[0] / x[0]); + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * atan_c[0] / (2.0 * M_PI) + 0.5; + } + else + { + c[0] = abs(x[0] / y[0]); + + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * (M_PI / 2.0 - atan_c[0]) / (2.0 * M_PI) + 0.5; + } + + if(x[0] < 0.0) + if(y[0] < 0.0) result[0] -= 0.5; + else if(y[0] > 0.0) result[0] += 0.5; + } + + if(x[1] > epsilon || abs(y[1]) > epsilon) + { + + if(x[1] < 0.0 ^^ y[1] < 0.0) + { + sign[1] = -1.0; + } + + if(abs(y[1]) <= abs(x[1])) + { + c[1] = abs(y[1] / x[1]); + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * atan_c[1] / (2.0 * M_PI) + 0.5; + } + else + { + c[1] = abs(x[1] / y[1]); + + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * (M_PI / 2.0 - atan_c[1]) / (2.0 * M_PI) + 0.5; + } + + if(x[1] < 0.0) + if(y[1] < 0.0) result[1] -= 0.5; + else if(y[1] > 0.0) result[1] += 0.5; + } + + if(x[2] > epsilon || abs(y[2]) > epsilon) + { + + if(x[2] < 0.0 ^^ y[2] < 0.0) + { + sign[2] = -1.0; + } + + if(abs(y[2]) <= abs(x[2])) + { + c[2] = abs(y[2] / x[2]); + // Taylors series expansion for atan + atan_c[2] += scale[2] * pow(c[2], float(1)) / float(1); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(3)) / float(3); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(5)) / float(5); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(7)) / float(7); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(9)) / float(9); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(11)) / float(11); + scale[2] *= -1.0; + + result[2] = sign[2] * atan_c[2] / (2.0 * M_PI) + 0.5; + } + else + { + c[2] = abs(x[2] / y[2]); + + // Taylors series expansion for atan + atan_c[2] += scale[2] * pow(c[2], float(1)) / float(1); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(3)) / float(3); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(5)) / float(5); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(7)) / float(7); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(9)) / float(9); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(11)) / float(11); + scale[2] *= -1.0; + + result[2] = sign[2] * (M_PI / 2.0 - atan_c[2]) / (2.0 * M_PI) + 0.5; + } + + if(x[2] < 0.0) + if(y[2] < 0.0) result[2] -= 0.5; + else if(y[2] > 0.0) result[2] += 0.5; + } + + gl_FragColor = result; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvary.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvary.vert new file mode 100644 index 0000000000..cf11d094d6 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvary.vert @@ -0,0 +1,20 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec3 c = 4.0 * 2.0 * (gtf_Color.rgb - 0.5); + color = vec4(atan(c) / M_PI + 0.5, 1.0); + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvary_ref.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvary_ref.vert new file mode 100644 index 0000000000..4b811a1036 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvary_ref.vert @@ -0,0 +1,161 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec3 c = 4.0 * 2.0 * (gtf_Color.rgb - 0.5); + vec3 atan_c = vec3(0.0); + vec3 scale = vec3(1.0); + vec3 sign = vec3(1.0); + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + + if(c[0] < 0.0) + { + sign[0] = -1.0; + c[0] *= -1.0; + } + + if(c[0] <= 1.0) + { + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * atan_c[0] / M_PI + 0.5; + } + else + { + c[0] = 1.0 / c[0]; + + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * (M_PI / 2.0 - atan_c[0]) / M_PI + 0.5; + } + + + if(c[1] < 0.0) + { + sign[1] = -1.0; + c[1] *= -1.0; + } + + if(c[1] <= 1.0) + { + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * atan_c[1] / M_PI + 0.5; + } + else + { + c[1] = 1.0 / c[1]; + + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * (M_PI / 2.0 - atan_c[1]) / M_PI + 0.5; + } + + if(c[2] < 0.0) + { + sign[2] = -1.0; + c[2] *= -1.0; + } + + if(c[2] <= 1.0) + { + // Taylors series expansion for atan + atan_c[2] += scale[2] * pow(c[2], float(1)) / float(1); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(3)) / float(3); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(5)) / float(5); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(7)) / float(7); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(9)) / float(9); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(11)) / float(11); + scale[2] *= -1.0; + + result[2] = sign[2] * atan_c[2] / M_PI + 0.5; + } + else + { + c[2] = 1.0 / c[2]; + + // Taylors series expansion for atan + atan_c[2] += scale[2] * pow(c[2], float(1)) / float(1); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(3)) / float(3); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(5)) / float(5); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(7)) / float(7); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(9)) / float(9); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(11)) / float(11); + scale[2] *= -1.0; + + result[2] = sign[2] * (M_PI / 2.0 - atan_c[2]) / M_PI + 0.5; + } + + color = result; + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvaryyvary.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvaryyvary.vert new file mode 100644 index 0000000000..60d2cca63b --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvaryyvary.vert @@ -0,0 +1,39 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec3 x = 2.0 * (gtf_Color.ggg - 0.5); + vec3 y = 2.0 * (gtf_Color.bbb - 0.5); + const float epsilon = 1.0e-4; + color = vec4(0.0, 0.0, 0.0, 1.0); + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x[0] > epsilon || abs(y[0]) > epsilon) + { + color[0] = atan(y[0], x[0]) / (2.0 * M_PI) + 0.5; + } + + if(x[1] > epsilon || abs(y[1]) > epsilon) + { + color[1] = atan(y[1], x[1]) / (2.0 * M_PI) + 0.5; + } + + if(x[2] > epsilon || abs(y[2]) > epsilon) + { + color[2] = atan(y[2], x[2]) / (2.0 * M_PI) + 0.5; + } + + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvaryyvary_ref.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvaryyvary_ref.vert new file mode 100644 index 0000000000..9a46dec1ad --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/atan_vec3_vert_xvaryyvary_ref.vert @@ -0,0 +1,185 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +attribute vec4 gtf_Vertex; +attribute vec4 gtf_Color; +uniform mat4 gtf_ModelViewProjectionMatrix; +varying vec4 color; + +void main (void) +{ + const float M_PI = 3.14159265358979323846; + vec3 x = 2.0 * (gtf_Color.ggg - 0.5); + vec3 y = 2.0 * (gtf_Color.bbb - 0.5); + vec3 c; + vec3 atan_c = vec3(0.0); + vec3 scale = vec3(1.0); + vec3 sign = vec3(1.0); + vec4 result = vec4(0.0, 0.0, 0.0, 1.0); + const float epsilon = 1.0e-4; + + // Avoid evaluating atan(0, x) for x < epsilon because it's implementation-dependent + if(x[0] > epsilon || abs(y[0]) > epsilon) + { + if(x[0] < 0.0 ^^ y[0] < 0.0) + { + sign[0] = -1.0; + } + + if(abs(y[0]) <= abs(x[0])) + { + c[0] = abs(y[0] / x[0]); + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * atan_c[0] / (2.0 * M_PI) + 0.5; + } + else + { + c[0] = abs(x[0] / y[0]); + + // Taylors series expansion for atan + atan_c[0] += scale[0] * pow(c[0], float(1)) / float(1); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(3)) / float(3); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(5)) / float(5); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(7)) / float(7); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(9)) / float(9); + scale[0] *= -1.0; + atan_c[0] += scale[0] * pow(c[0], float(11)) / float(11); + scale[0] *= -1.0; + + result[0] = sign[0] * (M_PI / 2.0 - atan_c[0]) / (2.0 * M_PI) + 0.5; + } + + if(x[0] < 0.0) + if(y[0] < 0.0) result[0] -= 0.5; + else if(y[0] > 0.0) result[0] += 0.5; + } + + if(x[1] > epsilon || abs(y[1]) > epsilon) + { + if(x[1] < 0.0 ^^ y[1] < 0.0) + { + sign[1] = -1.0; + } + + if(abs(y[1]) <= abs(x[1])) + { + c[1] = abs(y[1] / x[1]); + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * atan_c[1] / (2.0 * M_PI) + 0.5; + } + else + { + c[1] = abs(x[1] / y[1]); + + // Taylors series expansion for atan + atan_c[1] += scale[1] * pow(c[1], float(1)) / float(1); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(3)) / float(3); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(5)) / float(5); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(7)) / float(7); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(9)) / float(9); + scale[1] *= -1.0; + atan_c[1] += scale[1] * pow(c[1], float(11)) / float(11); + scale[1] *= -1.0; + + result[1] = sign[1] * (M_PI / 2.0 - atan_c[1]) / (2.0 * M_PI) + 0.5; + } + + if(x[1] < 0.0) + if(y[1] < 0.0) result[1] -= 0.5; + else if(y[1] > 0.0) result[1] += 0.5; + } + + if(x[2] > epsilon || abs(y[2]) > epsilon) + { + if(x[2] < 0.0 ^^ y[2] < 0.0) + { + sign[2] = -1.0; + } + + if(abs(y[2]) <= abs(x[2])) + { + c[2] = abs(y[2] / x[2]); + // Taylors series expansion for atan + atan_c[2] += scale[2] * pow(c[2], float(1)) / float(1); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(3)) / float(3); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(5)) / float(5); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(7)) / float(7); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(9)) / float(9); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(11)) / float(11); + scale[2] *= -1.0; + + result[2] = sign[2] * atan_c[2] / (2.0 * M_PI) + 0.5; + } + else + { + c[2] = abs(x[2] / y[2]); + + // Taylors series expansion for atan + atan_c[2] += scale[2] * pow(c[2], float(1)) / float(1); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(3)) / float(3); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(5)) / float(5); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(7)) / float(7); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(9)) / float(9); + scale[2] *= -1.0; + atan_c[2] += scale[2] * pow(c[2], float(11)) / float(11); + scale[2] *= -1.0; + + result[2] = sign[2] * (M_PI / 2.0 - atan_c[2]) / (2.0 * M_PI) + 0.5; + } + + if(x[2] < 0.0) + if(y[2] < 0.0) result[2] -= 0.5; + else if(y[2] > 0.0) result[2] += 0.5; + } + + color = result; + gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; +} diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/input.run.txt b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/input.run.txt new file mode 100644 index 0000000000..1c305f2111 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/atan/input.run.txt @@ -0,0 +1,3 @@ +# this file is auto-generated. DO NOT EDIT. +atan_001_to_008.html +atan_009_to_012.html |