[Freeciv-Dev] WinCE port - masking woes

["Jennifer Glover" <jglover@xxxxxxxxxxxxxx>]

Okay, I am giving up here in frustration.  I have tried and tried, but
I can not figure out why my masks are all black.  I changed the mask
creation to force it to monochrome, but no luck.  I even took the
entire crop and draw code and ran it through a test app.  There,
everything works fine!  So, this means that it might be going wrong
somewhere else?  Please, I am so desperate.  I can't figure this out. 
If anyone could help me on this, I would be so grateful.

Jenn



struct Sprite* crop_sprite(struct Sprite *source,
                           int x, int y, int width, int height)
{
  SPRITE *mysprite;
  HDC hdc;
  HBITMAP smallbitmap;
  HBITMAP smallmask;
  HBITMAP bigbitmap;
  HBITMAP bigmask;
  HBITMAP bigsave;
  HBITMAP smallsave;

  hdc=GetDC(hMainWindow);

  mysprite=NULL;
  smallmask=NULL;

  if (!hdcbig)
    hdcbig=CreateCompatibleDC(hdc);
  if (!hdcsmall)
    hdcsmall=CreateCompatibleDC(hdc);

  if (sprcache!=source)
  {
    if (bitmapcache) 
    {
      DeleteObject(bitmapcache);
    }
    sprcache=source;
    bitmapcache = create_bitmap_copy(source->bmp);
  }

  bigbitmap = bitmapcache;

  if (!bigbitmap)
  {
    freelog(LOG_FATAL,"create_bitmap_copy failed");
    return NULL;
  }
  if (!(hdcsmall && hdcbig))
  {
    freelog(LOG_FATAL,"CreateCompatibleDC failed");
    return NULL;
  }

  if (!(smallbitmap=CreateCompatibleBitmap(hdc,width,height)))
  {
    freelog(LOG_FATAL,"CreateCompatibleBitmap failed");
    return NULL;
  }
  
  bigsave=SelectObject(hdcbig,bigbitmap);
  smallsave=SelectObject(hdcsmall,smallbitmap);

  BitBlt(hdcsmall,0,0,width,height,hdcbig,x,y,SRCCOPY);
  
  if (source->has_mask)
  {
    bigmask = create_mask_copy(source->mask);
    SelectObject(hdcbig, bigmask);
    if ((smallmask = CreateBitmap(width,height,1,1,NULL)))
    {
      SelectObject(hdcsmall,smallmask);
      BitBlt(hdcsmall,0,0,width,height,hdcbig,x,y,SRCCOPY);
    }
    DeleteObject(bigmask);
  }
  
  mysprite=fc_malloc(sizeof(struct Sprite));
  mysprite->width=width;
  mysprite->height=height;
  mysprite->bmp = create_bitmap_copy(smallbitmap);
  mysprite->has_mask=0;
  if (smallmask)
  {
    mysprite->has_mask=1;
    mysprite->mask = create_mask_copy(smallmask);
  }
  
  SelectObject(hdcbig,bigsave);
  SelectObject(hdcsmall,smallsave);
  ReleaseDC(hMainWindow,hdc);
  if (smallmask)
  {
    DeleteObject(smallmask);
  }
  DeleteObject(smallbitmap);
  
  return mysprite;
}

void  draw_sprite_part(struct Sprite *sprite,HDC hdc,int x, int y,int
w, int h,
                       int xsrc, int ysrc)
{
  static HDC hdccomp = NULL;
  HBITMAP tempbit;
  HBITMAP bitmap;
  HBITMAP maskbit;

  if (!sprite) return;
  if (!hdccomp)
  {
    hdccomp=CreateCompatibleDC(hdc);
  }

  bitmap = create_bitmap_copy(sprite->bmp);

  if (sprite->has_mask)
  {
    COLORREF fgold,bgold;
    fgold=SetTextColor(hdc,RGB(0,0,0));
    bgold=SetBkColor(hdc,RGB(255,255,255));

    maskbit = create_mask_copy(sprite->mask);

    tempbit=SelectObject(hdccomp,maskbit);
    BitBlt(hdc,x,y,w,h,hdccomp,xsrc,ysrc,SRCAND);
    SelectObject(hdccomp,bitmap);
    BitBlt(hdc,x,y,w,h,hdccomp,xsrc,ysrc,SRCINVERT);

    DeleteObject(maskbit);

    SetBkColor(hdc,bgold);
    SetTextColor(hdc,fgold);
  }
  else
  {
    tempbit=SelectObject(hdccomp,bitmap);
    BitBlt(hdc,x,y,w,h,hdccomp,xsrc,ysrc,SRCCOPY);
  }
  SelectObject(hdccomp,tempbit);
  /*  DeleteDC(hdccomp); */
  DeleteObject(bitmap);
}

HBITMAP create_mask_copy(HBITMAP hBitmap)
{
  BITMAP bm;
  HDC sourceDC = NULL;
  HDC destDC = NULL;
  HBITMAP hbmOldSource = NULL;
  HBITMAP hbmResult = NULL;
  HBITMAP hbmOldDest = NULL;

  sourceDC = CreateCompatibleDC(NULL);
  destDC = CreateCompatibleDC(NULL);
  GetObject(hBitmap, sizeof(bm), &bm);
  hbmOldSource = (HBITMAP) SelectObject(sourceDC, hBitmap);
  hbmResult = CreateBitmap(bm.bmWidth, bm.bmHeight, 1, 1, NULL);
  hbmOldDest = (HBITMAP) SelectObject(destDC, hbmResult);
  BitBlt(destDC, 0, 0, bm.bmWidth, bm.bmHeight, sourceDC, 0, 0,
SRCCOPY);
  SelectObject(sourceDC, hbmOldSource);
  DeleteDC(sourceDC);
  SelectObject(destDC, hbmOldDest);
  DeleteDC(destDC);
  return hbmResult;
}