#ifndef ImgFltAux
#define ImgFltAux

#include <math.h>
#include <stdlib.h>

#ifndef WIN32
#define __max(a,b)  (((a) > (b)) ? (a) : (b))
#define __min(a,b)  (((a) < (b)) ? (a) : (b))
#endif


/* Memory Related functions */

inline void RectIntersection(int c[4], const int a[4], const int b[4])
{
	c[0] = __max(a[0],b[0]);
	c[1] = __min(a[1],b[1]);
	c[2] = __max(a[2],b[2]);
	c[3] = __min(a[3],b[3]);
}

inline int IsPtInRect(int x, int y, const int r[4])
{
	return r[0]<=x && x<r[1] && r[2]<=y && y<r[3];
}

template <class T>
void SwapBuffer(T *buf0, T *buf1, int size)
{
	while (size>0)
	{
		T tmp;
		
		tmp = *buf0;
		*buf0 = *buf1;
		*buf1 = tmp;

		buf0++;
		buf1++;

		size--;
	}
}

template <class T>
void VerticalFlipBuffer(T *buf,int width, int height)
{
	T *top = buf + (height-1)*width;
	T *bottom = buf;

	while (top > bottom)
	{
		SwapBuffer(top,bottom,width);
		top -= width;
		bottom += width;
	}
}

void double2byte(unsigned char *btBuf, const double *dbBuf, int size);

#endif