void XStretchBlt16(unsigned char * pBB,int sdx,int sdy,int ddx,int ddy)
{
 unsigned short * pSrc=(unsigned short *)pBackBuffer;
 unsigned short * pSrcR=NULL;
 unsigned short * pDst=(unsigned short *)pBB;
 unsigned long * pDstR=NULL;
 int x,y,cyo=-1,cy;
 int xpos, xinc;
 int ypos, yinc,ddx2=ddx>>1;
#ifdef USE_DGA2
 int DGA2fix;
 int dga2Fix;
 if (!iWindowMode)
  {
   DGA2fix = (char*)pBB == Xpixels;
   dga2Fix = dgaDev->mode.imageWidth - dgaDev->mode.viewportWidth;
  } else DGA2fix = dga2Fix = 0;
#endif

 // 2xsai stretching
if(iUseNoStretchBlt>=2)
{
	//p2XSaIFunc(pBackBuffer,sdx<<1,(unsigned char *)pSaIBigBuff,sdx,sdy);
    if(p2XSaIFunc==hq2x_16 )
	p2XSaIFunc(pBackBuffer,sdx<<2,(unsigned char *)pSaIBigBuff,sdx,sdy);
    else if(p2XSaIFunc==hq3x_16)
	p2XSaIFunc(pBackBuffer,sdx*6,(unsigned char *)pSaIBigBuff,sdx,sdy);
    else
	p2XSaIFunc(pBackBuffer,sdx<<1,(unsigned char *)pSaIBigBuff,sdx,sdy);
    pSrc=(unsigned short *)pSaIBigBuff;
    //sdx+=sdx;sdy+=sdy;
   if(iUseNoStretchBlt>=12)
   {
	sdx= sdx*3;
	sdy=sdy*3;
   }
   else
	sdx+=sdx;sdy+=sdy;
}

 xinc = (sdx << 16) / ddx;

 ypos=0;
 yinc = (sdy << 16) / ddy;

 for(y=0;y<ddy;y++,ypos+=yinc)
  {
   cy=(ypos>>16);

   if(cy==cyo)
    {
#ifndef USE_DGA2
     pDstR=(unsigned long *)(pDst-ddx);
#else
     pDstR=(unsigned long *)(pDst-(ddx+dga2Fix));
#endif
     for(x=0;x<ddx2;x++) *((unsigned long*)pDst)++=*pDstR++;
    }
   else
    {
     cyo=cy;
     pSrcR=pSrc+(cy*sdx);
     xpos = 0;
     for(x=ddx;x>0;--x)
      {
	   pSrcR+= xpos>>16;
       xpos -= xpos&0xffff0000;
       *pDst++=*pSrcR;
       xpos += xinc;
      }
    }
#ifdef USE_DGA2
   if (DGA2fix) pDst+= dga2Fix;
#endif
  }
}