transparency.h

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/*
 * This file is part of OpenTTD.
 * 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.
 * 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.
 * 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/>.
 */
 
#ifndef TRANSPARENCY_H
#define TRANSPARENCY_H
 
#include "gfx_func.h"
#include "openttd.h"
#include "core/bitmath_func.hpp"
 
enum TransparencyOption {
  TO_SIGNS = 0,  
  TO_TREES,      
  TO_HOUSES,     
  TO_INDUSTRIES, 
  TO_BUILDINGS,  
  TO_BRIDGES,    
  TO_STRUCTURES, 
  TO_CATENARY,   
  TO_TEXT,       
  TO_END,
  TO_INVALID,    
};
 
typedef uint TransparencyOptionBits; 
extern TransparencyOptionBits _transparency_opt;
extern TransparencyOptionBits _transparency_lock;
extern TransparencyOptionBits _invisibility_opt;
extern uint8_t _display_opt;
 
inline bool IsTransparencySet(TransparencyOption to)
{
  return (HasBit(_transparency_opt, to) && _game_mode != GM_MENU);
}
 
inline bool IsInvisibilitySet(TransparencyOption to)
{
  return (HasBit(_transparency_opt & _invisibility_opt, to) && _game_mode != GM_MENU);
}
 
inline void ToggleTransparency(TransparencyOption to)
{
  ToggleBit(_transparency_opt, to);
}
 
inline void ToggleInvisibility(TransparencyOption to)
{
  ToggleBit(_invisibility_opt, to);
}
 
inline void ToggleInvisibilityWithTransparency(TransparencyOption to)
{
  if (IsInvisibilitySet(to)) {
    ClrBit(_invisibility_opt, to);
    ClrBit(_transparency_opt, to);
  } else {
    SetBit(_invisibility_opt, to);
    SetBit(_transparency_opt, to);
  }
}
 
inline void ToggleTransparencyLock(TransparencyOption to)
{
  ToggleBit(_transparency_lock, to);
}
 
inline void ResetRestoreAllTransparency()
{
  /* if none of the non-locked options are set */
  if ((_transparency_opt & ~_transparency_lock) == 0) {
    /* set all non-locked options */
    _transparency_opt |= GB(~_transparency_lock, 0, TO_END);
  } else {
    /* clear all non-locked options */
    _transparency_opt &= _transparency_lock;
  }
 
  MarkWholeScreenDirty();
}
 
#endif /* TRANSPARENCY_H */