Add ToT WebGL conformance tests : part 9

conformance/ogles/GL/acos/acos_vec2_frag_xvary_ref.frag

Index: conformance/ogles/GL/acos/acos_vec2_frag_xvary_ref.frag
===================================================================
--- conformance/ogles/GL/acos/acos_vec2_frag_xvary_ref.frag	(revision 0)
+++ conformance/ogles/GL/acos/acos_vec2_frag_xvary_ref.frag	(working copy)
@@ -0,0 +1,147 @@
+
+/*
+** Copyright (c) 2012 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+
+/* 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);
+}