/*
 *      Copyright (C) 2005-2013 Team XBMC
 *      http://xbmc.org
 *
 *  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, 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 XBMC; see the file COPYING.  If not, see
 *  <http://www.gnu.org/licenses/>.
 *
 */

#ifndef CONVOLUTIONKERNELS
#define CONVOLUTIONKERNELS

#include "system.h"
#include "settings/VideoSettings.h"

class CConvolutionKernel
{
  public:
    CConvolutionKernel(ESCALINGMETHOD method, int size);
    ~CConvolutionKernel();

    int      GetSize()           { return m_size; }
    float*   GetFloatPixels()    { return m_floatpixels; }
    uint8_t* GetIntFractPixels() { return m_intfractpixels; }
    uint8_t* GetUint8Pixels()    { return m_uint8pixels; }

  private:
    CConvolutionKernel(const CConvolutionKernel&);
    CConvolutionKernel& operator=(const CConvolutionKernel&);
    void Lanczos2();
    void Lanczos3Fast();
    void Lanczos3();
    void Spline36Fast();
    void Spline36();
    void Bicubic(double B, double C);

    static double LanczosWeight(double x, double radius);
    static double Spline36Weight(double x);
    static double BicubicWeight(double x, double B, double C);

    void ToIntFract();
    void ToUint8();

    int      m_size;
    float*   m_floatpixels;
    uint8_t* m_intfractpixels;
    uint8_t* m_uint8pixels;
};

#endif //CONVOLUTIONKERNELS
