Add ToT WebGL conformance tests : part 9

conformance/ogles/GL/functions/vec4_empty_inout_vec4_empty_frag.frag

Index: conformance/ogles/GL/functions/vec4_empty_inout_vec4_empty_frag.frag
===================================================================
--- conformance/ogles/GL/functions/vec4_empty_inout_vec4_empty_frag.frag	(revision 0)
+++ conformance/ogles/GL/functions/vec4_empty_inout_vec4_empty_frag.frag	(working copy)
@@ -0,0 +1,91 @@
+
+/*
+** 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.
+*/
+
+
+#ifdef GL_ES
+precision mediump float;
+#endif
+varying vec4 color;
+
+// Function declaration.
+vec4 function(inout vec4 par);
+bool is_all(const in vec4 par, const in float value);
+void set_all(out vec4 par, const in float value);
+
+void main (void)
+{
+	vec4 par = vec4(1.0, 1.0, 1.0, 1.0);
+	vec4 ret = vec4(0.0, 0.0, 0.0, 0.0);
+
+	float gray = 0.0;
+
+	ret = function(par);
+
+	// The parameter should be changed by the function and the function should return 1.0.
+	if(is_all(par, 0.0) && is_all(ret, 1.0))
+	{
+		gray = 1.0;
+	}
+
+	gl_FragColor = vec4(gray, gray, gray, 1.0);
+}
+
+// Function definition.
+vec4 function(inout vec4 par)
+{
+	// Return the value of the parameter.
+	if(is_all(par, 1.0))
+	{
+		// Test parameter qualifier (default is "in").
+		set_all(par, 0.0);
+
+		return vec4(1.0, 1.0, 1.0, 1.0);
+	}
+	else
+		return vec4(0.0, 0.0, 0.0, 0.0);
+}
+
+bool is_all(const in vec4 par, const in float value)
+{
+	bool ret = true;
+
+	if(par[0] != value)
+		ret = false;
+	if(par[1] != value)
+		ret = false;
+	if(par[2] != value)
+		ret = false;
+	if(par[3] != value)
+		ret = false;
+
+	return ret;
+}
+
+void set_all(out vec4 par, const in float value)
+{
+	par[0] = value;
+	par[1] = value;
+	par[2] = value;
+	par[3] = value;
+}