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Location: cpp/openttd-patchpack/source/src/zoom_func.h - annotation
r10437:764a98dacf78
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(svn r14691) -Update: WebTranslator2 update to 2008-12-18 18:47:25
arabic_egypt - 132 fixed, 1 changed by khaloofah (133)
czech - 10 fixed, 25 changed by Hadez (35)
esperanto - 15 fixed by Athaba (15)
greek - 7 fixed by ouranogrammi (7)
indonesian - 88 changed by fanioz (88)
latvian - 117 fixed, 16 changed by peerer (83), marismols (50)
lithuanian - 15 fixed by Zogg (15)
malay - 38 fixed by tombakemas (5), Syed (33)
serbian - 39 fixed, 1 changed by Jenraux (40)
thai - 105 fixed by vetbook (105)
arabic_egypt - 132 fixed, 1 changed by khaloofah (133)
czech - 10 fixed, 25 changed by Hadez (35)
esperanto - 15 fixed by Athaba (15)
greek - 7 fixed by ouranogrammi (7)
indonesian - 88 changed by fanioz (88)
latvian - 117 fixed, 16 changed by peerer (83), marismols (50)
lithuanian - 15 fixed by Zogg (15)
malay - 38 fixed by tombakemas (5), Syed (33)
serbian - 39 fixed, 1 changed by Jenraux (40)
thai - 105 fixed by vetbook (105)
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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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