/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#ifndef LASTEXPRESS_GRAPHICS_H
#define LASTEXPRESS_GRAPHICS_H

#include "lastexpress/drawable.h"

namespace LastExpress {

class GraphicsManager {
public:
	enum BackgroundType {
		kBackgroundA,
		kBackgroundC,
		kBackgroundOverlay,
		kBackgroundInventory,
		kBackgroundAll
	};

	GraphicsManager();
	~GraphicsManager();

	// Update the screen
	void update();

	// Signal a change to the screen, will cause the planes to be remerged
	void change();

	// Clear some screen parts
	void clear(BackgroundType type);
	void clear(BackgroundType type, const Common::Rect &rect);

	// FIXME this is there for animation until we change it to use the graphic surface here instead of its private ones.
	Graphics::Surface _screen;      // Actual screen surface

	bool draw(Drawable *drawable, BackgroundType type, bool transition = false);

private:
	Graphics::Surface _backgroundA; // Background A
	Graphics::Surface _backgroundC; // Background C
	Graphics::Surface _overlay;     // Overlay
	Graphics::Surface _inventory;   // Overlay

	void mergePlanes();
	void updateScreen();
	Graphics::Surface *getSurface(BackgroundType type);

	bool _changed;
};

} // End of namespace LastExpress

#endif // LASTEXPRESS_GRAPHICS_H
