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/*
* This file is part of the KDE project
*
* Copyright (c) Michael Thaler <michael.thaler@physik.tu-muenchen.de>
*
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef _KIS_DROPSHADOW_H_
#define _KIS_DROPSHADOW_H_
#include <kis_progress_subject.h>
#include <kis_paint_device.h>
typedef enum
{
BLUR_IIR,
BLUR_RLE
} BlurMethod;
class QColor;
class KisView;
class KisProgressDisplayInterface;
class KisDropshadow : public KisProgressSubject {
Q_OBJECT
public:
KisDropshadow(KisView * view);
virtual ~KisDropshadow() {};
void dropshadow(KisProgressDisplayInterface * progress, Q_INT32 xoffset, Q_INT32 yoffset, Q_INT32 blurradius, QColor color, Q_UINT8 opacity, bool allowResize);
public: // Implement KisProgressSubject
virtual void cancel() { m_cancelRequested = true; }
private:
void gaussianblur (KisPaintDeviceSP src, KisPaintDeviceSP dst,
QRect& rect, double horz, double vert,
BlurMethod method,
KisProgressDisplayInterface * progressDisplay);
//gaussian blur helper functions
void find_constants(double n_p[], double n_m[], double d_p[], double d_m[], double bd_p[], double bd_m[], double std_dev);
void transfer_pixels(double *src1, double *src2, Q_UINT8 *dest, Q_INT32 bytes, Q_INT32 width);
Q_INT32* make_curve(double sigma, Q_INT32 *length);
void run_length_encode (Q_UINT8 *src, Q_INT32 *dest, Q_INT32 bytes, Q_INT32 width);
void multiply_alpha (Q_UINT8 *buf, Q_INT32 width, Q_INT32 bytes);
void separate_alpha (Q_UINT8 *buf, Q_INT32 width, Q_INT32 bytes);
private:
KisView * m_view;
bool m_cancelRequested;
};
#endif
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