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+
+/*
+** 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.
+*/
+
+
+attribute vec4 gtf_Vertex;
+uniform mat4 gtf_ModelViewProjectionMatrix;
+varying vec4 color;
+
+// Function declarations.
+ivec4 function(out ivec4 par[3]);
+bool is_all(const in ivec4 par, const in int value);
+bool is_all(const in ivec4 array[3], const in ivec4 value);
+void set_all(out ivec4 array[3], const in ivec4 value);
+
+void main (void)
+{
+ ivec4 par[3];
+ ivec4 ret = ivec4(0, 0, 0, 0);
+
+ float gray = 0.0;
+
+ // Initialize the entire array to 1.
+ set_all(par, ivec4(1, 1, 1, 1));
+
+ ret = function(par);
+
+ // The parameter should be changed by the function and the function should return 1.
+ if(is_all(par, ivec4(0, 0, 0, 0)) && is_all(ret, 1))
+ {
+ gray = 1.0;
+ }
+
+ color = vec4(gray, gray, gray, 1.0);
+ gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex;
+}
+
+// Function definitions.
+ivec4 function(out ivec4 par[3])
+{
+ // Test parameter qualifier (default is "in").
+ set_all(par, ivec4(0, 0, 0, 0));
+
+ return ivec4(1, 1, 1, 1);
+}
+
+bool is_all(const in ivec4 par, const in int 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;
+}
+
+bool is_all(const in ivec4 array[3], const in ivec4 value)
+{
+ bool ret = true;
+
+ if(array[0] != value)
+ ret = false;
+ if(array[1] != value)
+ ret = false;
+ if(array[2] != value)
+ ret = false;
+
+ return ret;
+}
+
+void set_all(out ivec4 array[3], const in ivec4 value)
+{
+ array[0] = value;
+ array[1] = value;
+ array[2] = value;
+}