diff options
Diffstat (limited to 'dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/acos/acos_vec2_frag_xvary_ref.frag')
-rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/acos/acos_vec2_frag_xvary_ref.frag | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/acos/acos_vec2_frag_xvary_ref.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/acos/acos_vec2_frag_xvary_ref.frag new file mode 100644 index 0000000000..273f1a01a3 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/acos/acos_vec2_frag_xvary_ref.frag @@ -0,0 +1,130 @@ + +/* +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. +*/ + + +/* The following files are direct copies of each other: + * + * GL/acos/acos_vec2_frag_xvary_ref.frag + * GL/asin/asin_vec2_frag_xvary_ref.frag + * + * Care should be taken to apply any changes to both. Only the last + * line where gl_FragColor is assigned should be different. + */ + +#ifdef GL_ES +precision mediump float; +#endif +varying vec4 color; + +float lerp(float a, float b, float s) +{ + return a + (b - a) * s; +} + +void main (void) +{ + float asinValues[17]; + asinValues[0] = -1.5708; + asinValues[1] = -1.06544; + asinValues[2] = -0.848062; + asinValues[3] = -0.675132; + asinValues[4] = -0.523599; + asinValues[5] = -0.384397; + asinValues[6] = -0.25268; + asinValues[7] = -0.125328; + asinValues[8] = 0.0; + asinValues[9] = 0.125328; + asinValues[10] = 0.25268; + asinValues[11] = 0.384397; + asinValues[12] = 0.523599; + asinValues[13] = 0.675132; + asinValues[14] = 0.848062; + asinValues[15] = 1.06544; + asinValues[16] = 1.5708; + + const float M_PI = 3.14159265358979323846; + vec2 c = 2.0 * (color.rg - 0.5); + + vec2 arrVal = (c + vec2(1.0, 1.0)) * 8.0; + int arr0x = int(floor(arrVal.x)); + int arr0y = int(floor(arrVal.y)); + vec2 weight = arrVal - floor(arrVal); + vec2 asin_c = vec2(0.0); + + if (arr0x == 0) + asin_c.x = lerp(asinValues[0], asinValues[1], weight.x); + else if (arr0x == 1) + asin_c.x = lerp(asinValues[1], asinValues[2], weight.x); + else if (arr0x == 2) + asin_c.x = lerp(asinValues[2], asinValues[3], weight.x); + else if (arr0x == 3) + asin_c.x = lerp(asinValues[3], asinValues[4], weight.x); + else if (arr0x == 4) + asin_c.x = lerp(asinValues[4], asinValues[5], weight.x); + else if (arr0x == 5) + asin_c.x = lerp(asinValues[5], asinValues[6], weight.x); + else if (arr0x == 6) + asin_c.x = lerp(asinValues[6], asinValues[7], weight.x); + else if (arr0x == 7) + asin_c.x = lerp(asinValues[7], asinValues[8], weight.x); + else if (arr0x == 8) + asin_c.x = lerp(asinValues[8], asinValues[9], weight.x); + else if (arr0x == 9) + asin_c.x = lerp(asinValues[9], asinValues[10], weight.x); + else if (arr0x == 10) + asin_c.x = lerp(asinValues[10], asinValues[11], weight.x); + else if (arr0x == 11) + asin_c.x = lerp(asinValues[11], asinValues[12], weight.x); + else if (arr0x == 12) + asin_c.x = lerp(asinValues[12], asinValues[13], weight.x); + else if (arr0x == 13) + asin_c.x = lerp(asinValues[13], asinValues[14], weight.x); + else if (arr0x == 14) + asin_c.x = lerp(asinValues[14], asinValues[15], weight.x); + else if (arr0x == 15) + asin_c.x = lerp(asinValues[15], asinValues[16], weight.x); + else if (arr0x == 16) + asin_c.x = asinValues[16]; + + if (arr0y == 0) + asin_c.y = lerp(asinValues[0], asinValues[1], weight.y); + else if (arr0y == 1) + asin_c.y = lerp(asinValues[1], asinValues[2], weight.y); + else if (arr0y == 2) + asin_c.y = lerp(asinValues[2], asinValues[3], weight.y); + else if (arr0y == 3) + asin_c.y = lerp(asinValues[3], asinValues[4], weight.y); + else if (arr0y == 4) + asin_c.y = lerp(asinValues[4], asinValues[5], weight.y); + else if (arr0y == 5) + asin_c.y = lerp(asinValues[5], asinValues[6], weight.y); + else if (arr0y == 6) + asin_c.y = lerp(asinValues[6], asinValues[7], weight.y); + else if (arr0y == 7) + asin_c.y = lerp(asinValues[7], asinValues[8], weight.y); + else if (arr0y == 8) + asin_c.y = lerp(asinValues[8], asinValues[9], weight.y); + else if (arr0y == 9) + asin_c.y = lerp(asinValues[9], asinValues[10], weight.y); + else if (arr0y == 10) + asin_c.y = lerp(asinValues[10], asinValues[11], weight.y); + else if (arr0y == 11) + asin_c.y = lerp(asinValues[11], asinValues[12], weight.y); + else if (arr0y == 12) + asin_c.y = lerp(asinValues[12], asinValues[13], weight.y); + else if (arr0y == 13) + asin_c.y = lerp(asinValues[13], asinValues[14], weight.y); + else if (arr0y == 14) + asin_c.y = lerp(asinValues[14], asinValues[15], weight.y); + else if (arr0y == 15) + asin_c.y = lerp(asinValues[15], asinValues[16], weight.y); + else if (arr0y == 16) + asin_c.y = asinValues[16]; + + // acos(x) = PI/2 - asin(x) + gl_FragColor = vec4(0.5 - asin_c / M_PI, 0.0, 1.0); +} |