kis_math_toolbox.h

Go to the documentation of this file.

/*
 *  This file is part of the KDE project
 *
 *  SPDX-FileCopyrightText: 2005 Cyrille Berger <cberger@cberger.net>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef KIS_MATH_TOOLBOX_H
#define KIS_MATH_TOOLBOX_H
 
#include <QObject>
#include <QRect>
 
#include <new>
 
#include <KoColorSpace.h>
 
#include "kis_types.h"
#include "kis_paint_device.h"
 
#ifdef _MSC_VER
#pragma warning(disable: 4290) // disable "C++ exception specification ignored" warning
#endif
 
#if !defined _MSC_VER
#pragma GCC diagnostic ignored "-Wcast-align"
#endif
 
typedef double(*PtrToDouble)(const quint8*, int);
typedef void (*PtrFromDouble)(quint8*, int, double);
typedef void (*PtrFromDoubleCheckNull)(quint8*, int, double, bool*);
 
class KRITAIMAGE_EXPORT KisMathToolbox
{
 
public:
 
    struct KisFloatRepresentation {
 
        KisFloatRepresentation(uint nsize, uint ndepth)
            : coeffs(new float[nsize*nsize*ndepth])
            , size(nsize)
            , depth(ndepth) {
            // XXX: Valgrind shows that these are being used without being initialised.
            for (quint32 i = 0; i < nsize * nsize * ndepth; ++i) {
                coeffs[i] = 0;
            }
        }
 
        ~KisFloatRepresentation() {
            if (coeffs) delete[] coeffs;
        }
 
        float* coeffs;
        uint size;
        uint depth;
    };
 
    typedef KisFloatRepresentation KisWavelet;
 
    inline KisWavelet* initWavelet(KisPaintDeviceSP lay, const QRect&);
 
    inline uint fastWaveletTotalSteps(const QRect&);
 
    KisWavelet* fastWaveletTransformation(KisPaintDeviceSP src, const QRect&, KisWavelet* buff = 0);
 
    void fastWaveletUntransformation(KisPaintDeviceSP dst, const QRect&, KisWavelet* wav, KisWavelet* buff = 0);
 
    bool getToDoubleChannelPtr(QList<KoChannelInfo *> cis, QVector<PtrToDouble>& f);
    bool getFromDoubleChannelPtr(QList<KoChannelInfo *> cis, QVector<PtrFromDouble>& f);
    bool getFromDoubleCheckNullChannelPtr(QList<KoChannelInfo *> cis, QVector<PtrFromDoubleCheckNull>& f);
 
    double minChannelValue(KoChannelInfo *);
    double maxChannelValue(KoChannelInfo *);
 
private:
 
    void wavetrans(KisWavelet* wav, KisWavelet* buff, uint halfsize);
    void waveuntrans(KisWavelet* wav, KisWavelet* buff, uint halfsize);
 
    void transformToFR(KisPaintDeviceSP src, KisFloatRepresentation*, const QRect&);
 
    void transformFromFR(KisPaintDeviceSP dst, KisFloatRepresentation*, const QRect&);
 
};
 
inline KisMathToolbox::KisWavelet* KisMathToolbox::initWavelet(KisPaintDeviceSP src, const QRect& rect)
{
    int size;
    int maxrectsize = (rect.height() < rect.width()) ? rect.width() : rect.height();
    for (size = 2; size < maxrectsize; size *= 2) ;
    qint32 depth = src->colorSpace()->colorChannelCount();
    return new KisWavelet(size, depth);
}
 
inline uint KisMathToolbox::fastWaveletTotalSteps(const QRect& rect)
{
    int size, steps;
    int maxrectsize = (rect.height() < rect.width()) ? rect.width() : rect.height();
    steps = 0;
    for (size = 2; size < maxrectsize; size *= 2) steps += size / 2; ;
    return steps;
}
 
#endif