---

alphaimage.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 __ALPHAIMAGE_H__
#define __ALPHAIMAGE_H__

#include "channel.cpp"
#include "filter.cpp"

class AlphaImage
{
protected:
  Channel<unsigned char> *alphadata;
  Channel<unsigned char> *alphafilter;
  int width;
  int height;
public:
  AlphaImage(const int height, const int width);
  virtual ~AlphaImage();
  virtual double Draw() = 0;
  virtual inline int GetWidth();
  virtual inline int GetHeight();
  virtual void WriteToTiff(const char* filename) = 0;
  virtual unsigned char GetAlpha(const int x, const int y);
  virtual void SetAlpha(const int x, const int y, const unsigned char val);
  void RemoveAlphaFilters();
  void AttachAlphaFilter(ChannelFilter<unsigned char>* filter);
  void LoadAlphaMap(const char* filename);
  virtual unsigned char GetLuminance(const int x, const int y) = 0;
  virtual void SetLuminance(const int x, const int y, const unsigned char val) = 0;
  virtual void RemoveLuminanceFilters() = 0;
  virtual void AttachLuminanceFilter(ChannelFilter<unsigned char>* filter) = 0;
};

#endif

---