qgsrastershaderfunction.h

一个非常好的GIS开源新版本

/* **************************************************************************
                qgsrastershaderfunction.h -  description
                       -------------------
begin                : Fri Dec 28 2007
copyright            : (C) 2007 by Peter J. Ersts
email                : [e-mail]

****************************************************************************/

/* **************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/


#ifndef QGSRASTERSHADERFUNCTION_H
#define QGSRASTERSHADERFUNCTION_H

class CORE_EXPORT QgsRasterShaderFunction {

public:
  QgsRasterShaderFunction(double theMinimumValue=0.0, double theMaximumValue=255.0);
  virtual ~QgsRasterShaderFunction() {}
   
  /** \brief generates and new RGB value based on one input value */
  virtual bool generateShadedValue(double, int*, int*, int*);
  /** \brief generates and new RGB value based on original RGB value */
  virtual bool generateShadedValue(double, double, double, int*, int*, int*);
  
  /** \brief Set the maximum value */
  virtual void setMaximumValue(double);
  /** \brief Return the minimum value */
  virtual void setMinimumValue(double);

protected:
  /** \brief User defineable maximum value for the shading function */
  double mMaximumValue;
  /** \brief User defineable minimum value for the shading function */
  double mMinimumValue;
  /** \brief Minimum maximum range for the shading function */
  double mMinimumMaximumRange;
};
#endif