transparency.h

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #ifndef TRANSPARENCY_H
00013 #define TRANSPARENCY_H
00014 
00015 #include "gfx_func.h"
00016 #include "openttd.h"
00017 #include "core/bitmath_func.hpp"
00018 
00024 enum TransparencyOption {
00025   TO_SIGNS = 0,  
00026   TO_TREES,      
00027   TO_HOUSES,     
00028   TO_INDUSTRIES, 
00029   TO_BUILDINGS,  
00030   TO_BRIDGES,    
00031   TO_STRUCTURES, 
00032   TO_CATENARY,   
00033   TO_LOADING,    
00034   TO_TUNNELS,    
00035   TO_END,
00036   TO_INVALID,    
00037 };
00038 
00039 typedef uint TransparencyOptionBits; 
00040 extern TransparencyOptionBits _transparency_opt;
00041 extern TransparencyOptionBits _transparency_lock;
00042 extern TransparencyOptionBits _invisibility_opt;
00043 extern byte _display_opt;
00044 
00051 static inline bool IsTransparencySet(TransparencyOption to)
00052 {
00053   return (HasBit(_transparency_opt, to) && _game_mode != GM_MENU);
00054 }
00055 
00062 static inline bool IsInvisibilitySet(TransparencyOption to)
00063 {
00064   return (HasBit(_transparency_opt & _invisibility_opt, to) && _game_mode != GM_MENU);
00065 }
00066 
00072 static inline void ToggleTransparency(TransparencyOption to)
00073 {
00074   ToggleBit(_transparency_opt, to);
00075 }
00076 
00082 static inline void ToggleInvisibility(TransparencyOption to)
00083 {
00084   ToggleBit(_invisibility_opt, to);
00085 }
00086 
00094 static inline void ToggleInvisibilityWithTransparency(TransparencyOption to)
00095 {
00096   if (IsInvisibilitySet(to)) {
00097     ClrBit(_invisibility_opt, to);
00098     ClrBit(_transparency_opt, to);
00099   } else {
00100     SetBit(_invisibility_opt, to);
00101     SetBit(_transparency_opt, to);
00102   }
00103 }
00104 
00110 static inline void ToggleTransparencyLock(TransparencyOption to)
00111 {
00112   ToggleBit(_transparency_lock, to);
00113 }
00114 
00116 static inline void ResetRestoreAllTransparency()
00117 {
00118   /* if none of the non-locked options are set */
00119   if ((_transparency_opt & ~_transparency_lock) == 0) {
00120     /* set all non-locked options */
00121     _transparency_opt |= GB(~_transparency_lock, 0, TO_END);
00122   } else {
00123     /* clear all non-locked options */
00124     _transparency_opt &= _transparency_lock;
00125   }
00126 
00127   MarkWholeScreenDirty();
00128 }
00129 
00130 #endif /* TRANSPARENCY_H */