diff options
Diffstat (limited to '')
-rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/tan/tan_float_frag_xvary_ref.frag | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/tan/tan_float_frag_xvary_ref.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/tan/tan_float_frag_xvary_ref.frag new file mode 100644 index 0000000000..308e399685 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/tan/tan_float_frag_xvary_ref.frag @@ -0,0 +1,24 @@ + +/* +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 = 0.5 * M_PI * 2.0 * (color.r - 0.5); + float o; + if(abs(c) < 0.5) // -45..45 + o = 0.5 * (sin(c) / cos(c)) + 0.5; + else // 45..90, -45..-90 + o = 0.5 * (cos(c) / sin(c)) + 0.5; + gl_FragColor = vec4(o, 0.0, 0.0, 1.0); +} |