/* $Id$ */

/*
 * 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_type.h Types related to zooming in and out. */

#ifndef ZOOM_TYPE_H
#define ZOOM_TYPE_H

#include "core/enum_type.hpp"

static int const ZOOM_LVL_SHIFT = 2;
static int const ZOOM_LVL_BASE  = 1 << ZOOM_LVL_SHIFT;

/** All zoom levels we know. */
enum ZoomLevel {
	/* Our possible zoom-levels */
	ZOOM_LVL_BEGIN  = 0, ///< Begin for iteration.
	ZOOM_LVL_NORMAL = 0, ///< The normal zoom level.
	ZOOM_LVL_OUT_2X,     ///< Zoomed 2 times out.
	ZOOM_LVL_OUT_4X,     ///< Zoomed 4 times out.
	ZOOM_LVL_OUT_8X,     ///< Zoomed 8 times out.
	ZOOM_LVL_OUT_16X,    ///< Zoomed 16 times out.
	ZOOM_LVL_OUT_32X,    ///< Zoomed 32 times out.
	ZOOM_LVL_END,        ///< End for iteration.

	ZOOM_LVL_COUNT = ZOOM_LVL_END - ZOOM_LVL_BEGIN, ///< Number of zoom levels.

	/* Here we define in which zoom viewports are */
	ZOOM_LVL_VIEWPORT = ZOOM_LVL_OUT_4X, ///< Default zoom level for viewports.
	ZOOM_LVL_NEWS     = ZOOM_LVL_OUT_4X, ///< Default zoom level for the news messages.
	ZOOM_LVL_INDUSTRY = ZOOM_LVL_OUT_8X, ///< Default zoom level for the industry view.
	ZOOM_LVL_TOWN     = ZOOM_LVL_OUT_8X, ///< Default zoom level for the town view.
	ZOOM_LVL_AIRCRAFT = ZOOM_LVL_OUT_4X, ///< Default zoom level for the aircraft view.
	ZOOM_LVL_SHIP     = ZOOM_LVL_OUT_4X, ///< Default zoom level for the ship view.
	ZOOM_LVL_TRAIN    = ZOOM_LVL_OUT_4X, ///< Default zoom level for the train view.
	ZOOM_LVL_ROADVEH  = ZOOM_LVL_OUT_4X, ///< Default zoom level for the road vehicle view.
	ZOOM_LVL_WORLD_SCREENSHOT = ZOOM_LVL_OUT_4X, ///< Default zoom level for the world screen shot.

	ZOOM_LVL_DETAIL   = ZOOM_LVL_OUT_8X, ///< All zoomlevels below or equal to this, will result in details on the screen, like road-work, ...

	ZOOM_LVL_MIN      = ZOOM_LVL_NORMAL, ///< Minimum zoom level.
	ZOOM_LVL_MAX      = ZOOM_LVL_OUT_32X, ///< Maximum zoom level.
};
DECLARE_POSTFIX_INCREMENT(ZoomLevel)

/** Type for storing the zoom level in a byte. */
typedef SimpleTinyEnumT<ZoomLevel, byte> ZoomLevelByte;

extern ZoomLevelByte _gui_zoom;
#define ZOOM_LVL_GUI (_gui_zoom)

#endif /* ZOOM_TYPE_H */