kis_warptransform_worker.h

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/*
 *  kis_warptransform_worker.h - part of Krita
 *
 *  SPDX-FileCopyrightText: 2010 Marc Pegon <pe.marc@free.fr>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef KIS_WARPTRANSFORM_WORKER_H
#define KIS_WARPTRANSFORM_WORKER_H
 
#include "kis_types.h"
#include "kritaimage_export.h"
 
#include <QImage>
#include <QPolygon>
#include <QPoint>
#include <QPointF>
#include <QRect>
 
#include <KoUpdater.h>
 
class KRITAIMAGE_EXPORT KisWarpTransformWorker : public QObject
{
    Q_OBJECT
 
public:
    typedef enum WarpType_ {AFFINE_TRANSFORM = 0, SIMILITUDE_TRANSFORM, RIGID_TRANSFORM, N_MODES} WarpType;
    typedef enum WarpCalculation_ {GRID = 0, DRAW} WarpCalculation;
 
    static QPointF affineTransformMath(QPointF v, QVector<QPointF> p, QVector<QPointF> q, qreal alpha);
    static QPointF similitudeTransformMath(QPointF v, QVector<QPointF> p, QVector<QPointF> q, qreal alpha);
    static QPointF rigidTransformMath(QPointF v, QVector<QPointF> p, QVector<QPointF> q, qreal alpha);
 
    static QImage transformQImage(WarpType warpType,
                                  const QVector<QPointF> &origPoint,
                                  const QVector<QPointF> &transfPoint,
                                  qreal alpha,
                                  const QImage& srcImage,
                                  const QPointF &srcQImageOffset,
                                  QPointF *newOffset);
 
    // Prepare the transformation on dev
    KisWarpTransformWorker(WarpType warpType, QVector<QPointF> origPoint, QVector<QPointF> transfPoint, qreal alpha, KoUpdater *progress);
    ~KisWarpTransformWorker() override;
    // Perform the prepared transformation
    void run(KisPaintDeviceSP srcDev, KisPaintDeviceSP dstDev);
 
    QRect approxChangeRect(const QRect &rc);
    QRect approxNeedRect(const QRect &rc, const QRect &fullBounds);
 
private:
    struct FunctionTransformOp;
    typedef QPointF (*WarpMathFunction)(QPointF, QVector<QPointF>, QVector<QPointF>, qreal);
 
private:
    WarpMathFunction m_warpMathFunction;
    WarpCalculation m_warpCalc {GRID};
    QVector<QPointF> m_origPoint;
    QVector<QPointF> m_transfPoint;
    qreal m_alpha {1.0};
    KoUpdater *m_progress {0};
};
 
#endif