1 files changed, 32 insertions, 0 deletions
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;
+	}
+}