1 files changed, 40 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/asin/asin_float_vert_xvary_ref.vert b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/asin/asin_float_vert_xvary_ref.vert
new file mode 100644
index 0000000000..18826e3e96
--- /dev/null
+++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/asin/asin_float_vert_xvary_ref.vert
@@ -0,0 +1,40 @@
+
+/*
+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 = 2.0 * (gtf_Color.r - 0.5);
+
+	float asin_c = 0.0;
+	float scale = 1.0;
+	float sign = 1.0;
+
+	// pow can't handle negative numbers so take advantage of symmetry
+	if(c < 0.0)
+	{
+		sign = -1.0;
+		c *= -1.0;
+	}
+
+	// Taylors series expansion for asin
+	// 1000/2 iterations necessary to get the accuracy with this method
+	for(int i = 1; i < 1000; i += 2)
+	{
+		asin_c += scale * pow(c, float(i)) / float(i);
+		scale *= float(i) / float(i + 1);
+	}
+
+	color = vec4(sign * asin_c / M_PI + 0.5, 0.0, 0.0, 1.0);
+	gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex;
+}