cpp/openttd-patchpack/source Files · src/zoom.hpp

Files @ r7921:8e674055514f

Branch filter:

Location: cpp/openttd-patchpack/source/src/zoom.hpp

r7921:8e674055514f 2.6 KiB text/x-c++hdr Show Annotation Show as Raw Download as Raw

belugas

(svn r11474) -Feature: Allow to resize on creation the smallmap gui in order to show all the types industry available.
-Feature: Allow to enable/disable individually or all at once, the industries shown on small map.
This will permit to easily find those that are of some interest for the player.
Heavily based on gule's patch

/* $Id$ */

/** @file zoom.hpp */

#ifndef ZOOM_HPP
#define ZOOM_HPP

enum ZoomLevel {
	/* Our possible zoom-levels */
	ZOOM_LVL_NORMAL = 0,
	ZOOM_LVL_OUT_2X,
	ZOOM_LVL_OUT_4X,
	ZOOM_LVL_OUT_8X,
	ZOOM_LVL_END,

	/* Here we define in which zoom viewports are */
	ZOOM_LVL_VIEWPORT = ZOOM_LVL_NORMAL,
	ZOOM_LVL_NEWS     = ZOOM_LVL_NORMAL,
	ZOOM_LVL_INDUSTRY = ZOOM_LVL_OUT_2X,
	ZOOM_LVL_TOWN     = ZOOM_LVL_OUT_2X,
	ZOOM_LVL_AIRCRAFT = ZOOM_LVL_NORMAL,
	ZOOM_LVL_SHIP     = ZOOM_LVL_NORMAL,
	ZOOM_LVL_TRAIN    = ZOOM_LVL_NORMAL,
	ZOOM_LVL_ROADVEH  = ZOOM_LVL_NORMAL,
	ZOOM_LVL_WORLD_SCREENSHOT = ZOOM_LVL_NORMAL,

	ZOOM_LVL_DETAIL   = ZOOM_LVL_OUT_2X, ///< All zoomlevels below or equal to this, will result in details on the screen, like road-work, ...

	ZOOM_LVL_MIN      = ZOOM_LVL_NORMAL,
	ZOOM_LVL_MAX      = ZOOM_LVL_OUT_8X,
};

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 = (int)zoom - (int)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 = (int)zoom - (int)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 = (int)zoom - (int)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 = (int)zoom - (int)ZOOM_LVL_NORMAL;
	return (zoom > ZOOM_LVL_NORMAL) ? value >> izoom : value << -izoom;
}

#endif /* ZOOM_HPP */