TextureCache.h

/*=====================================================================

QGroundControl Open Source Ground Control Station

(c) 2009, 2010 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>

This file is part of the QGROUNDCONTROL project

    QGROUNDCONTROL 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.

    QGROUNDCONTROL 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 QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.

======================================================================*/

/**
 * @file
 *   @brief Definition of the class TextureCache.
 *
 *   @author Lionel Heng <hengli@student.ethz.ch>
 *
 */

#ifndef TEXTURECACHE_H
#define TEXTURECACHE_H

#include <QVector>

#include "Texture.h"
#include "WebImageCache.h"

class TextureCache
{
public:
    explicit TextureCache(uint32_t cacheSize);

    TexturePtr get(const QString& tileURL);

    void sync(void);

private:
    QPair<TexturePtr, int32_t> lookup(const QString& tileURL);

    bool requireSync(void) const;

    uint32_t cacheSize;
    QVector<TexturePtr> textures;

    QScopedPointer<WebImageCache> imageCache;
};

#endif // TEXTURECACHE_H