zoom_func.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 ZOOM_FUNC_H
#define ZOOM_FUNC_H
 
#include "zoom_type.h"
 
inline int ScaleByZoom(int value, ZoomLevel zoom)
{
  return value << zoom;
}
 
inline int UnScaleByZoom(int value, ZoomLevel zoom)
{
  return (value + (1 << zoom) - 1) >> zoom;
}
 
inline int AdjustByZoom(int value, int zoom)
{
  return zoom < 0 ? UnScaleByZoom(value, ZoomLevel(-zoom)) : ScaleByZoom(value, ZoomLevel(zoom));
}
 
inline int ScaleByZoomLower(int value, ZoomLevel zoom)
{
  return value << zoom;
}
 
inline int UnScaleByZoomLower(int value, ZoomLevel zoom)
{
  return value >> zoom;
}
 
inline int UnScaleGUI(int value)
{
  return UnScaleByZoom(value, ZOOM_LVL_GUI);
}
 
inline ZoomLevel ScaleZoomGUI(ZoomLevel value)
{
  return std::clamp(ZoomLevel(value + (ZOOM_LVL_GUI - ZOOM_LVL_OUT_4X)), ZOOM_LVL_MIN, ZOOM_LVL_MAX);
}
 
inline ZoomLevel UnScaleZoomGUI(ZoomLevel value)
{
  return std::clamp(ZoomLevel(value - (ZOOM_LVL_GUI - ZOOM_LVL_OUT_4X)), ZOOM_LVL_MIN, ZOOM_LVL_MAX);
}
 
inline int ScaleSpriteTrad(int value)
{
  return UnScaleGUI(value * ZOOM_LVL_BASE);
}
 
inline int ScaleGUITrad(int value)
{
  return value * _gui_scale / 100;
}
 
#endif /* ZOOM_FUNC_H */