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image_effect.h

/*
 *   EasySok --- A(nother) sokoban game for KDE.
 *
 *   Copyright (C) 2001 by Ralf Schmelter (ralfs@pc2a.chemie.uni-dortmund.de).
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License version 2 as
 *   published by the Free Software Foundation.
 *
 *   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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */


#ifndef EASYSOK_IMAGE_EFFECT_INC_GUARD_H
#define EASYSOK_IMAGE_EFFECT_INC_GUARD_H


#include <vector>

#include <qcolor.h>


class QImage;




class ImageEffect
{
public:

    static void blendOnLower(int x_offset, int y_offset, QImage const & upper, QImage & lower);


    static void blend(QImage & image, float val, QRgb color, bool fade_rgb, bool fade_alpha);


    static void blend(QImage & image, int val, QRgb color, bool fade_rgb, bool fade_alpha);


    static void colorize(QImage & image, float val, QRgb color);


    static void colorize(QImage & image, int val, QRgb color);


    static void scale(QImage & image, int new_width, int new_height);


private:

    static void calcScaleFactors(int from_pixels, int to_pixels, int sum, std::vector<int> & lengths,
                                 std::vector<int> & starts, std::vector<int> & factor_offsets,
                                 std::vector<Q_UINT32> & factors);
};


#endif

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