/* Copyright (C) 2003-2006 Jesper K. Pedersen <blackie@kde.org>

   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; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#ifndef IMAGELOADER_H
#define IMAGELOADER_H

#include <qthread.h>
#include <QImage>

namespace ImageManager
{
class Manager;
class ImageRequest;
class ThumbnailStorage;

class ImageLoader :public QThread {
public:
    ImageLoader(ThumbnailStorage* storage);
    static QImage rotateAndScale( QImage, int width, int height, int angle );
    QImage tryLoadThumbnail( ImageRequest* request, bool& ok );
    void writeThumbnail( ImageRequest* request, QImage image );

    static QString thumbnailKey( QString uri, int dim );

protected:
    virtual void run();
    QImage loadImage( ImageRequest* request, bool& ok );
    static int calcLoadSize( ImageRequest* request );
    QImage scaleAndRotate( ImageRequest* request, QImage img );
    static QString thumbnailKey( ImageRequest* request );
    static QString requestURL( ImageRequest* request );
    bool shouldImageBeScale( const QImage& img, ImageRequest* request );

private:
    ThumbnailStorage *const _storage;
};

}

#endif /* IMAGELOADER_H */

