int Load_Frame_BOB(BOB_PTR bob, // bob to load with data

                   BITMAP_FILE_PTR bitmap, // bitmap to scan image data from

                   int frame,       // frame to load

                   int cx,int cy,   // cell or absolute pos. to scan image from

                   int mode)        // if 0 then cx,cy is cell position, else 

                                    // cx,cy are absolute coords

{
// this function extracts a bitmap out of a bitmap file


UCHAR *source_ptr,   // working pointers

      *dest_ptr;

DDSURFACEDESC2 ddsd;  //  direct draw surface description 


// is this a valid bob

if (!bob)
   return(0);

// test the mode of extraction, cell based or absolute

if (mode==BITMAP_EXTRACT_MODE_CELL)
   {
   // re-compute x,y

   cx = cx*(bob->width+1) + 1;
   cy = cy*(bob->height+1) + 1;
   } // end if


// extract bitmap data

source_ptr = bitmap->buffer + cy*bitmap->bitmapinfoheader.biWidth+cx;

// get the addr to destination surface memory


// set size of the structure

ddsd.dwSize = sizeof(ddsd);

// lock the display surface

(bob->images[frame])->Lock(NULL,
                           &ddsd,
                           DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR,
                           NULL);

// assign a pointer to the memory surface for manipulation

dest_ptr = (UCHAR *)ddsd.lpSurface;

// iterate thru each scanline and copy bitmap

for (int index_y=0; index_y<bob->height; index_y++)
    {
    // copy next line of data to destination

    memcpy(dest_ptr, source_ptr,bob->width);

    // advance pointers

    dest_ptr   += (bob->width+bob->width_fill);
    source_ptr += bitmap->bitmapinfoheader.biWidth;
    } // end for index_y


// unlock the surface 

(bob->images[frame])->Unlock(NULL);

// set state to loaded

bob->attr |= BOB_ATTR_LOADED;

// return success

return(1);

} // end Load_Frame_BOB  

   source_ptr = bitmap->buffer + cy*bitmap->bitmapinfoheader.biWidth*BytesPerPixel+cx*BytesPerPixel;//cx = our X position, so we have to do the *BytesPerPixel on it! memcpy(dest_ptr, source_ptr,bob->width*BytesPerPixel);//We have to do width * BytesPerPixel, to copy all colors!// advance pointers dest_ptr   += (bob->width*BytesPerPixel+bob->width_fill*BytesPerPixel);//Not sure if we need to multiply width_Fill, but I think we do! source_ptr += bitmap->bitmapinfoheader.biWidth*BytesPerPixel;