1 /** @file gl_special.h  Special color effects for the game view.
2  *
3  * @authors Copyright (c) 2018 Jaakko Keränen <jaakko.keranen@iki.fi>
4  *
5  * @par License
6  * GPL: http://www.gnu.org/licenses/gpl.html
7  *
8  * <small>This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by the
10  * Free Software Foundation; either version 2 of the License, or (at your
11  * option) any later version. This program is distributed in the hope that it
12  * will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
13  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
14  * Public License for more details. You should have received a copy of the GNU
15  * General Public License along with this program; if not, see:
16  * http://www.gnu.org/licenses</small>
17  */
18 
19 #ifndef LIBCOMMON_REFRESH_SPECIAL_H
20 #define LIBCOMMON_REFRESH_SPECIAL_H
21 
22 #include <de/libcore.h>
23 
24 DENG2_EXTERN_C void R_SpecialFilterRegister(void);
25 
26 DENG2_EXTERN_C void R_InitSpecialFilter(void);
27 
28 /**
29  * Draws a special filter over the screen (e.g. the Doom inversing filter used
30  * when in god mode).
31  */
32 DENG2_EXTERN_C void R_UpdateSpecialFilter(int player);
33 
34 DENG2_EXTERN_C void R_UpdateSpecialFilterWithTimeDelta(int player, float delta);
35 
36 #endif // LIBCOMMON_REFRESH_SPECIAL_H
37