oimageeffect.h

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//FIXME: Revise for Opie - do we really need such fancy stuff on PDA's?
//FIXME: Maybe not on SL5xxx, but surely on C700 :))
//FIXME: I think we don#t need that -zecke

/* This file is part of the KDE libraries
 Copyright (C) 1998, 1999, 2001, 2002 Daniel M. Duley <mosfet@interaccess.com>
 (C) 1998, 1999 Christian Tibirna <ctibirna@total.net>
 (C) 1998, 1999 Dirk A. Mueller <mueller@kde.org>

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

// $Id: oimageeffect.h,v 1.4 2004/10/07 19:36:35 clem Exp $

#ifndef OIMAGEEFFECT_H
#define OIMAGEEFFECT_H

class QImage;
class QSize;
class QColor;

namespace Opie {
namespace Ui   {
class OImageEffect
{
public:
    enum GradientType { VerticalGradient, HorizontalGradient,
                        DiagonalGradient, CrossDiagonalGradient,
                        PyramidGradient, RectangleGradient,
                        PipeCrossGradient, EllipticGradient };
    enum RGBComponent { Red, Green, Blue, Gray, All };

    enum Lighting {NorthLite, NWLite, WestLite, SWLite,
                   SouthLite, SELite, EastLite, NELite};

    enum ModulationType { Intensity, Saturation, HueShift, Contrast };

    enum NoiseType { UniformNoise=0, GaussianNoise, MultiplicativeGaussianNoise,
                     ImpulseNoise, LaplacianNoise, PoissonNoise};

    enum RotateDirection{ Rotate90, Rotate180, Rotate270 };

    static QImage gradient(const QSize &size, const QColor &ca,
                           const QColor &cb, GradientType type, int ncols=3);

    static QImage unbalancedGradient(const QSize &size, const QColor &ca,
            const QColor &cb, GradientType type, int xfactor = 100,
            int yfactor = 100, int ncols = 3);

    static QImage& blend(const QColor& clr, QImage& dst, float opacity);

    static QImage& blend(QImage& src, QImage& dst, float opacity);

    static QImage& blend(QImage &image, float initial_intensity,
                      const QColor &bgnd, GradientType eff,
                      bool anti_dir=false);

    static QImage& blend(QImage &image1,QImage &image2,
                         GradientType gt, int xf=100, int yf=100);

    static QImage& blend(QImage &image1, QImage &image2,
                         QImage &blendImage, RGBComponent channel);

    static bool blend(const QImage & upper, const QImage & lower, QImage & output);
// Not yet...    static bool blend(const QImage & image1, const QImage & image2, QImage & output, const QRect & destRect);

    static bool blend(int &x, int &y, const QImage & upper, const QImage & lower, QImage & output);
    static bool blendOnLower(int x, int y, const QImage & upper, const QImage & lower);

    static QImage& channelIntensity(QImage &image, float percent,
                                    RGBComponent channel);

    static QImage& fade(QImage &img, float val, const QColor &color);


    static QImage& flatten(QImage &image, const QColor &ca,
           const QColor &cb, int ncols=0);

    static QImage& hash(QImage &image, Lighting lite=NorthLite,
                        unsigned int spacing=0);

    static QImage& intensity(QImage &image, float percent);

    static QImage& modulate(QImage &image, QImage &modImage, bool reverse,
                ModulationType type, int factor, RGBComponent channel);

    static QImage& toGray(QImage &image, bool fast = false);

    static QImage& desaturate(QImage &image, float desat = 0.3);

    static QImage& contrast(QImage &image, int c);

    static QImage& dither(QImage &img, const QColor *palette, int size);

    static QImage& selectedImage( QImage &img, const QColor &col );

    static void contrastHSV(QImage &img, bool sharpen=true);

    static void normalize(QImage &img);

    static void equalize(QImage &img);

    static void threshold(QImage &img, unsigned int value=128);

    static void solarize(QImage &img, double factor=50.0);

    static QImage emboss(QImage &src);

    static QImage despeckle(QImage &src);

    static QImage charcoal(QImage &src, double factor=50.0);

    static QImage rotate(QImage &src, RotateDirection r);

    static QImage sample(QImage &src, int w, int h);

    static QImage addNoise(QImage &src, NoiseType type = GaussianNoise);

    static QImage blur(QImage &src, double factor=50.0);

    static QImage edge(QImage &src, double factor=50.0);

    static QImage implode(QImage &src, double factor=30.0,
                   unsigned int background = 0xFFFFFFFF);
    static QImage oilPaint(QImage &src, int radius=3);

    static QImage sharpen(QImage &src, double factor=30.0);

    static QImage spread(QImage &src, unsigned int amount=3);

    static QImage shade(QImage &src, bool color_shading=true, double azimuth=30.0,
                        double elevation=30.0);
     static QImage swirl(QImage &src, double degrees=50.0, unsigned int background =
                         0xFFFFFFFF);

     static QImage wave(QImage &src, double amplitude=25.0, double frequency=150.0,
                        unsigned int background = 0xFFFFFFFF);

private:

    static unsigned int lHash(unsigned int c);
    static unsigned int uHash(unsigned int c);

    static int nearestColor( int r, int g, int b, const QColor *pal, int size );

    static void hull(const int x_offset, const int y_offset, const int polarity,
                     const int width, const int height,
                     unsigned int *f, unsigned int *g);
    static unsigned int generateNoise(unsigned int pixel, NoiseType type);
    static unsigned int interpolateColor(QImage *image, double x, double y,
                                         unsigned int background);
};

}
}

#endif

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