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/*
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;
// Function declaration.
bool function(out bool par);
void main (void)
{
bool par = true;
bool ret = false;
float gray = 0.0;
ret = function(par);
// The parameter should be changed by the function and the function should return true.
if(!par && ret)
{
gray = 1.0;
}
gl_FragColor = vec4(gray, gray, gray, 1.0);
}
// Function definition.
bool function(out bool par)
{
// Test parameter qualifier (default is "in").
par = false;
return true;
}
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