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Location: cpp/openttd-patchpack/source/src/zoom_func.h - annotation
r10116:be292ddefbc7
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(svn r14300) -Update: WebTranslator2 update to 2008-09-12 17:41:59
brazilian_portuguese - 13 fixed by tucalipe (13)
catalan - 12 fixed by arnaullv (12)
danish - 9 fixed, 7 changed by ThomasA (16)
dutch - 1 changed by habell (1)
estonian - 5 fixed by kristjans (5)
galician - 98 fixed, 6 changed by Condex (104)
german - 7 fixed, 83 changed by sulai (69), dih (21)
korean - 12 fixed by leejaeuk5 (12)
romanian - 20 fixed by kneekoo (20)
slovenian - 5 fixed by Necrolyte (5)
brazilian_portuguese - 13 fixed by tucalipe (13)
catalan - 12 fixed by arnaullv (12)
danish - 9 fixed, 7 changed by ThomasA (16)
dutch - 1 changed by habell (1)
estonian - 5 fixed by kristjans (5)
galician - 98 fixed, 6 changed by Condex (104)
german - 7 fixed, 83 changed by sulai (69), dih (21)
korean - 12 fixed by leejaeuk5 (12)
romanian - 20 fixed by kneekoo (20)
slovenian - 5 fixed by Necrolyte (5)
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/** @file zoom_func.h Functions related to zooming. */
#ifndef ZOOM_FUNC_H
#define ZOOM_FUNC_H
#include "zoom_type.h"
extern ZoomLevel _saved_scrollpos_zoom;
/**
* 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
*/
static inline int ScaleByZoom(int value, ZoomLevel zoom)
{
if (zoom == ZOOM_LVL_NORMAL) return value;
int izoom = zoom - ZOOM_LVL_NORMAL;
return (zoom > ZOOM_LVL_NORMAL) ? value << izoom : (value + (1 << -izoom) - 1) >> -izoom;
}
/**
* 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
*/
static inline int UnScaleByZoom(int value, ZoomLevel zoom)
{
if (zoom == ZOOM_LVL_NORMAL) return value;
int izoom = zoom - ZOOM_LVL_NORMAL;
return (zoom > ZOOM_LVL_NORMAL) ? (value + (1 << izoom) - 1) >> izoom : value << -izoom;
}
/**
* 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
*/
static inline int ScaleByZoomLower(int value, ZoomLevel zoom)
{
if (zoom == ZOOM_LVL_NORMAL) return value;
int izoom = zoom - ZOOM_LVL_NORMAL;
return (zoom > ZOOM_LVL_NORMAL) ? value << izoom : value >> -izoom;
}
/**
* 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
*/
static inline int UnScaleByZoomLower(int value, ZoomLevel zoom)
{
if (zoom == ZOOM_LVL_NORMAL) return value;
int izoom = zoom - ZOOM_LVL_NORMAL;
return (zoom > ZOOM_LVL_NORMAL) ? value >> izoom : value << -izoom;
}
#endif /* ZOOM_FUNC_H */
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