transparency.h

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00001 /* $Id: transparency.h 18802 2010-01-14 22:56:54Z frosch $ */
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_END,
00035 };
00036 
00037 typedef uint TransparencyOptionBits; 
00038 extern TransparencyOptionBits _transparency_opt;
00039 extern TransparencyOptionBits _transparency_lock;
00040 extern TransparencyOptionBits _invisibility_opt;
00041 
00048 static inline bool IsTransparencySet(TransparencyOption to)
00049 {
00050   return (HasBit(_transparency_opt, to) && _game_mode != GM_MENU);
00051 }
00052 
00059 static inline bool IsInvisibilitySet(TransparencyOption to)
00060 {
00061   return (HasBit(_transparency_opt & _invisibility_opt, to) && _game_mode != GM_MENU);
00062 }
00063 
00069 static inline void ToggleTransparency(TransparencyOption to)
00070 {
00071   ToggleBit(_transparency_opt, to);
00072 }
00073 
00079 static inline void ToggleInvisibility(TransparencyOption to)
00080 {
00081   ToggleBit(_invisibility_opt, to);
00082 }
00083 
00091 static inline void ToggleInvisibilityWithTransparency(TransparencyOption to)
00092 {
00093   if (IsInvisibilitySet(to)) {
00094     ClrBit(_invisibility_opt, to);
00095     ClrBit(_transparency_opt, to);
00096   } else {
00097     SetBit(_invisibility_opt, to);
00098     SetBit(_transparency_opt, to);
00099   }
00100 }
00101 
00107 static inline void ToggleTransparencyLock(TransparencyOption to)
00108 {
00109   ToggleBit(_transparency_lock, to);
00110 }
00111 
00113 static inline void ResetRestoreAllTransparency()
00114 {
00115   /* if none of the non-locked options are set */
00116   if ((_transparency_opt & ~_transparency_lock) == 0) {
00117     /* set all non-locked options */
00118     _transparency_opt |= GB(~_transparency_lock, 0, TO_END);
00119   } else {
00120     /* clear all non-locked options */
00121     _transparency_opt &= _transparency_lock;
00122   }
00123 
00124   MarkWholeScreenDirty();
00125 }
00126 
00127 #endif /* TRANSPARENCY_H */

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