Stretch24(long x1,long x2,long y1,long y2,long yr,long yw,
Stretch24(unsigned x1, unsigned x2, unsigned y1, unsigned y2, unsigned yr, unsigned yw, unsigned aStartRow, unsigned aStartColumn, unsigned aEndColumn,
Stretch24(long x1,long x2,long y1,long y2,long yr,long yw,	  unsigned char *aSrcImage, unsigned aSrcStride,	  unsigned char *aDstImage, unsigned aDstStride){  long dx,dy,e,d,dx2;  short sx,sy;  unsigned char *src, *dst;  dx = abs((int)(x2-x1));  dy = abs((int)(y2-y1));  sx = 3*sign(x2-x1);  sy = 3*sign(y2-y1);  e = dy-dx;  dx2 = dx;  dy += 1;  src=aSrcImage+yr*aSrcStride+3*y1;  dst=aDstImage+yw*aDstStride+3*x1;  if (!dx2) dx2=1;  for (d=0; d<=dx; d++) {    dst[0] = src[0];    dst[1] = src[1];    dst[2] = src[2];    while (e>=0) {      src += sy;      e -= dx2;    }    dst += sx;    e += dy;  }}