blob: c29074351f9094c47acd65b187f600fa2e8cbe37 [file] [log] [blame]
/*
** 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;
const mat4 mat_ones = mat4(1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0);
const mat4 mat_zeros = mat4(0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0);
// Function declarations.
mat4 function(in mat4 par[2]);
bool is_all(const in mat4 par, const in float value);
bool is_all(const in mat4 array[2], const in mat4 value);
void set_all(out mat4 array[2], const in mat4 value);
void main (void)
{
mat4 par[2];
mat4 ret = mat_zeros;
float gray = 0.0;
// Initialize the entire array to 1.0.
set_all(par, mat_ones);
ret = function(par);
// The parameter should remain unchanged by the function and the function should return 1.0.
if(is_all(par, mat_ones) && is_all(ret, 1.0))
{
gray = 1.0;
}
gl_FragColor = vec4(gray, gray, gray, 1.0);
}
// Function definitions.
mat4 function(in mat4 par[2])
{
// Return the value of the array.
if(is_all(par, mat_ones))
{
// Test parameter qualifier (default is "in").
set_all(par, mat_zeros);
return mat_ones;
}
else
return mat_zeros;
}
bool is_all(const in mat4 par, const in float value)
{
bool ret = true;
if(par[0][0] != value)
ret = false;
if(par[0][1] != value)
ret = false;
if(par[0][2] != value)
ret = false;
if(par[0][3] != value)
ret = false;
if(par[1][0] != value)
ret = false;
if(par[1][1] != value)
ret = false;
if(par[1][2] != value)
ret = false;
if(par[1][3] != value)
ret = false;
if(par[2][0] != value)
ret = false;
if(par[2][1] != value)
ret = false;
if(par[2][2] != value)
ret = false;
if(par[2][3] != value)
ret = false;
if(par[3][0] != value)
ret = false;
if(par[3][1] != value)
ret = false;
if(par[3][2] != value)
ret = false;
if(par[3][3] != value)
ret = false;
return ret;
}
bool is_all(const in mat4 array[2], const in mat4 value)
{
bool ret = true;
if(array[0] != value)
ret = false;
if(array[1] != value)
ret = false;
return ret;
}
void set_all(out mat4 array[2], const in mat4 value)
{
array[0] = value;
array[1] = value;
}