1 files changed, 33 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/log/log_vec3_frag_xvary_ref.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/log/log_vec3_frag_xvary_ref.frag
new file mode 100644
index 0000000000..a5d21f6f35
--- /dev/null
+++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/log/log_vec3_frag_xvary_ref.frag
@@ -0,0 +1,33 @@
+
+/*
+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)
+{
+	vec3 x = 31.0 * color.rgb + 1.0;
+	vec3 y = vec3(0.0);
+	vec3 z;   // x-1 / x+1
+	int n = 50;
+
+	// ln(x) = 2[x-1 + 1 (x-1)^3 + 1 (x-1)^5 + ...] for x > 0
+	//          [x+1   3 (x+1)     5 (x+1)        ]
+	z = (x - 1.0) / (x + 1.0);
+	vec3 p = z;
+	for(int i = 1; i <= 101; i += 2)
+	{
+		y += p / float(i);
+		p *= z * z;
+	}
+	y *= 2.0;
+
+	gl_FragColor = vec4(y / 3.466, 1.0);
+}