L_StartResize

L_INT StartResizeExample(pBITMAPHANDLE pLeadBitmap) 
{ 
   L_INT nRet; 
   L_VOID*        pResizeData; 
   L_INT          CopyWidth, CopyHeight; 
   L_UCHAR*       pBuf;       /* Buffer to hold the input row */ 
   HGLOBAL        hBuf;       /* Handle to the input buffer */ 
   BITMAPHANDLE   TmpBitmap;  /* Bitmap containing input data */ 
   L_INT          DestRow;    /* Row counter for the output */ 
   L_INT          i, n;       /* Loop counters */ 
 
   /* Load the input bitmap, at 24 bits per pixel */ 
   nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\Image3.cmp")), &TmpBitmap, sizeof(BITMAPHANDLE), 24, ORDER_BGR, NULL, NULL); 
   if(nRet != SUCCESS) 
      return nRet; 
   /* Allocate the buffer the size of one line of 24-bit input data */ 
   hBuf = GlobalAlloc(GMEM_MOVEABLE, TmpBitmap.Width * 3); 
   pBuf = (L_UCHAR*)GlobalLock( hBuf ); 
   /* Create the new bitmap */ 
   if(pLeadBitmap->Flags.Allocated) 
      L_FreeBitmap(pLeadBitmap); 
   nRet = L_CreateBitmap(pLeadBitmap, 
                        sizeof(BITMAPHANDLE), 
                        TYPE_CONV, 
                        TmpBitmap.Width / 2, 
                        TmpBitmap.Height / 2, 
                        24, 
                        TmpBitmap.Order, 
                        NULL, 
                        TmpBitmap.ViewPerspective, NULL, 0); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Initialize the resize process */ 
   nRet = L_StartResize (TmpBitmap.Width, 
                        TmpBitmap.Height, 
                        TmpBitmap.Width / 2, 
                        TmpBitmap.Height / 2, 
                        &pResizeData); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Initialize the destination row number */ 
   DestRow = 0; 
   /* Use L_Resize to process each row in the bitmap */ 
   L_AccessBitmap(pLeadBitmap); 
   L_AccessBitmap(&TmpBitmap); 
   for(i=0; i < TmpBitmap.Height; i++) 
   { 
      nRet = (L_INT)L_GetBitmapRow(&TmpBitmap, pBuf, i, TmpBitmap.BytesPerLine); 
      if(nRet < 1) 
         return nRet; 
      nRet = L_Resize (pBuf, i, TmpBitmap.BitsPerPixel, &CopyWidth, &CopyHeight, pResizeData); 
      if(nRet != SUCCESS) 
      { 
         if(nRet != 0)// 0 means line was not needed for the resize 
            return nRet; 
      } 
      /* Output as many or as few rows as nRet = L_Resize supplies */ 
      for(n=0; n < CopyHeight; n++) 
      { 
         nRet =(L_INT )L_PutBitmapRow(pLeadBitmap, pBuf, DestRow, CopyWidth * 3); 
         if(nRet < 1) 
            return nRet; 
         DestRow++; 
      } 
   } 
   L_ReleaseBitmap(&TmpBitmap); 
   L_ReleaseBitmap(pLeadBitmap); 
   L_FreeBitmap(&TmpBitmap); 
   /* End the resize process */ 
   nRet = L_StopResize (pResizeData); 
   if(nRet != SUCCESS) 
      return nRet; 
   /* Free memory that we no longer need */ 
   GlobalFree(hBuf); 
   return SUCCESS; 
}