ngcdcsSUBFRM.hpp

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#ifndef ngcdcsSUBFRM_H
#define ngcdcsSUBFRM_H
 
 
#ifndef __cplusplus
#error This is a C++ include file and cannot be used from plain C
#endif

#define ngcdcsMAX_SUBFRM 32

struct ngcdcs_subwin_t {
  int x1; //< Lower left X
  int y1; //< Lower left Y 
  int nx; //< X-dimension
  int ny; //< Y-dimension
  int x2; //< Upper right X
  int y2; //< Upper right Y

  ngcdcs_subwin_t() {Clear();}

  int Valid() {return ((x1 >= 0) && (y1 >= 0) && (x2 >= x1) && (y2 >= y1));}

  void Clear() {x1 = -1; y1 = -1; x2 = -1; y2 = -1; nx = 0; ny = 0;}

  void Validate() {x2 = x1 + nx - 1; y2 = y1 + ny - 1;}
};

class ngcdcsSUBFRM
{
public:
  ngcdcs_subwin_t win[ngcdcsMAX_SUBFRM];

  int dimX;

  int dimY;

  ngcdcsSUBFRM() {dimX = 0; dimY = 0;}

  virtual ~ngcdcsSUBFRM() {}

  void Clear() {
    int i;
    for (i=0;i<ngcdcsMAX_SUBFRM;i++) win[i].Clear();
    dimX = 0; dimY = 0;
  }

  void Validate() {
    int i;
    for (i=0;i<ngcdcsMAX_SUBFRM;i++) win[i].Validate();
  }

  int NumFrm() {
    int i;
    for (i=0;(i<ngcdcsMAX_SUBFRM) && (win[i].Valid());i++);
    return (i);
  }
  
  void Apply(void *buffer, int nx, int ny, int bitPix) {
    int n = NumFrm();
 
    if (n > 0)
      {
      int bytes = abs(bitPix) / 8;
      char *pIn = (char *)buffer;
      char *pOut = (char *)buffer;
      int x, y;
 
      dimY = 0; dimX = 0;
      for (y=0;y<ny;y++)
    {
    int dx = 0;
    for (x=0;x<nx;x++)
      {
      if (Mask_(x, y, n))
        {
        dx++;
        memcpy(pOut, pIn, bytes);
        pOut += bytes;
        }
      pIn += bytes;
      }
    if (dx > 0) 
      {
      dimX = dx;
      dimY++;
      }
    }
      
      if (dimX == 0)
    {
    /*
     * No operation has been done on the buffer
     */
    dimX = nx; dimY = ny;
    }
      }
    else
      {
      /*
       * No operation has been done on the buffer
       */
      dimX = nx; dimY = ny;
      }
  }
 
protected:
 
private:
  int Mask_(int x, int y, int n) {
    int i;
 
    for (i=0;i<n;i++)
      {
      if ((x >= win[i].x1) && (x <= win[i].x2) &&
      (y >= win[i].y1) && (y <= win[i].y2))
    {
    return (1);
    }
      }
 
    return (0);
  }
 
};
 
#endif