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Location: cpp/openttd-patchpack/source/src/zoom_func.h
r28541:42e13f513738
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | /*
* 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/>.
*/
/** @file zoom_func.h Functions related to zooming. */
#ifndef ZOOM_FUNC_H
#define ZOOM_FUNC_H
#include "zoom_type.h"
/**
* Scale by zoom level, usually shift left (when zoom > ZOOM_LVL_NORMAL)
* When shifting right, value is rounded up
* @param value value to shift
* @param zoom zoom level to shift to
* @return shifted value
*/
inline int ScaleByZoom(int value, ZoomLevel zoom)
{
return value << zoom;
}
/**
* Scale by zoom level, usually shift right (when zoom > ZOOM_LVL_NORMAL)
* When shifting right, value is rounded up
* @param value value to shift
* @param zoom zoom level to shift to
* @return shifted value
*/
inline int UnScaleByZoom(int value, ZoomLevel zoom)
{
return (value + (1 << zoom) - 1) >> zoom;
}
/**
* Adjust by zoom level; zoom < 0 shifts right, zoom >= 0 shifts left
* @param value value to shift
* @param zoom zoom level to shift to
* @return shifted value
*/
inline int AdjustByZoom(int value, int zoom)
{
return zoom < 0 ? UnScaleByZoom(value, ZoomLevel(-zoom)) : ScaleByZoom(value, ZoomLevel(zoom));
}
/**
* Scale by zoom level, usually shift left (when zoom > ZOOM_LVL_NORMAL)
* @param value value to shift
* @param zoom zoom level to shift to
* @return shifted value
*/
inline int ScaleByZoomLower(int value, ZoomLevel zoom)
{
return value << zoom;
}
/**
* Scale by zoom level, usually shift right (when zoom > ZOOM_LVL_NORMAL)
* @param value value to shift
* @param zoom zoom level to shift to
* @return shifted value
*/
inline int UnScaleByZoomLower(int value, ZoomLevel zoom)
{
return value >> zoom;
}
/**
* Short-hand to apply GUI zoom level.
* @param value Pixel amount at #ZOOM_LVL_BEGIN (full zoom in).
* @return Pixel amount at #ZOOM_LVL_GUI (current interface size).
*/
inline int UnScaleGUI(int value)
{
return UnScaleByZoom(value, ZOOM_LVL_GUI);
}
/**
* Scale zoom level relative to GUI zoom.
* @param value zoom level to scale
* @return scaled zoom level
*/
inline ZoomLevel ScaleZoomGUI(ZoomLevel value)
{
return std::clamp(ZoomLevel(value + (ZOOM_LVL_GUI - ZOOM_LVL_OUT_4X)), ZOOM_LVL_MIN, ZOOM_LVL_MAX);
}
/**
* UnScale zoom level relative to GUI zoom.
* @param value zoom level to scale
* @return un-scaled zoom level
*/
inline ZoomLevel UnScaleZoomGUI(ZoomLevel value)
{
return std::clamp(ZoomLevel(value - (ZOOM_LVL_GUI - ZOOM_LVL_OUT_4X)), ZOOM_LVL_MIN, ZOOM_LVL_MAX);
}
/**
* Scale traditional pixel dimensions to GUI zoom level, for drawing sprites.
* @param value Pixel amount at #ZOOM_LVL_BASE (traditional "normal" interface size).
* @return Pixel amount at #ZOOM_LVL_GUI (current interface size).
*/
inline int ScaleSpriteTrad(int value)
{
return UnScaleGUI(value * ZOOM_LVL_BASE);
}
/**
* Scale traditional pixel dimensions to GUI zoom level.
* @param value Pixel amount at #ZOOM_LVL_BASE (traditional "normal" interface size).
* @return Pixel amount at #ZOOM_LVL_GUI (current interface size).
*/
inline int ScaleGUITrad(int value)
{
return value * _gui_scale / 100;
}
#endif /* ZOOM_FUNC_H */
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