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_END,
00035 };
00036 
00037 typedef uint TransparencyOptionBits; 
00038 extern TransparencyOptionBits _transparency_opt;
00039 extern TransparencyOptionBits _transparency_lock;
00040 extern TransparencyOptionBits _invisibility_opt;
00041 extern byte _display_opt; 
00042 
00049 static inline bool IsTransparencySet(TransparencyOption to)
00050 {
00051   return (HasBit(_transparency_opt, to) && _game_mode != GM_MENU);
00052 }
00053 
00060 static inline bool IsInvisibilitySet(TransparencyOption to)
00061 {
00062   return (HasBit(_transparency_opt & _invisibility_opt, to) && _game_mode != GM_MENU);
00063 }
00064 
00070 static inline void ToggleTransparency(TransparencyOption to)
00071 {
00072   ToggleBit(_transparency_opt, to);
00073 }
00074 
00080 static inline void ToggleInvisibility(TransparencyOption to)
00081 {
00082   ToggleBit(_invisibility_opt, to);
00083 }
00084 
00092 static inline void ToggleInvisibilityWithTransparency(TransparencyOption to)
00093 {
00094   if (IsInvisibilitySet(to)) {
00095     ClrBit(_invisibility_opt, to);
00096     ClrBit(_transparency_opt, to);
00097   } else {
00098     SetBit(_invisibility_opt, to);
00099     SetBit(_transparency_opt, to);
00100   }
00101 }
00102 
00108 static inline void ToggleTransparencyLock(TransparencyOption to)
00109 {
00110   ToggleBit(_transparency_lock, to);
00111 }
00112 
00114 static inline void ResetRestoreAllTransparency()
00115 {
00116   /* if none of the non-locked options are set */
00117   if ((_transparency_opt & ~_transparency_lock) == 0) {
00118     /* set all non-locked options */
00119     _transparency_opt |= GB(~_transparency_lock, 0, TO_END);
00120   } else {
00121     /* clear all non-locked options */
00122     _transparency_opt &= _transparency_lock;
00123   }
00124 
00125   MarkWholeScreenDirty();
00126 }
00127 
00128 #endif /* TRANSPARENCY_H */

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