graphics.h

/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#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