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filterstatefulltrans.h

/**********************************************************************************
* Copyright (c) 2003, Christoph Rueegg <opendev@cdrnet.ch> and Matthias Bader     *
* All rights reserved.                                                            *
*                                                                                 *
* Project Website: http://www.cdrnet.net/projects/painter/                        *
*                                                                                 *
* 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 COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.                                                 *
**********************************************************************************/

#ifndef __FILTERSTATEFULLTRANS_H__
#define __FILTERSTATEFULLTRANS_H__

#include "../image/filter.cpp"

class StatefullTransformationFilter: public ChannelFilter<unsigned char>
{
private:                                           
  Channel<unsigned char>* src;
  Channel<unsigned char>* trg;
  bool active;
  int x0,y0;
public:
  StatefullTransformationFilter();
  virtual ~StatefullTransformationFilter();
  void OnMouseEvent(const int button, const int state, int x, int y);
  void OnMotionEvent(int x, int y);
  bool OnIdleEvent();
  virtual void OnStart(Channel<unsigned char>* source, Channel<unsigned char>* target, int x, int y) = 0;
  virtual void OnEnd(Channel<unsigned char>* source, Channel<unsigned char>* target, int x0, int y0, int x1, int y1) = 0;
  virtual bool OnRender(Channel<unsigned char>* source, Channel<unsigned char>* target, int x0, int y0, int x1, int y1) = 0;
  inline unsigned char Get(const int x, const int y);
  inline void Set(const int x, const int y, const unsigned char val);
  void ResetChannel();
};

#endif

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