int FASTCALL CLIPPING_UpdateGCRegion ( DC * Dc )

Definition at line 15 of file cliprgn.c.

Referenced by DceResetActiveDCEs(), GdiExtSelectClipRgn(), GdiSelectVisRgn(), NtGdiExcludeClipRect(), NtGdiIntersectClipRect(), and NtGdiOffsetClipRgn().

{
   PROSRGNDATA CombinedRegion;
   //HRGN hRgnVis;
   PREGION prgnClip, prgnGCClip;

    /* Would prefer this, but the rest of the code sucks... */
    //ASSERT(Dc->rosdc.hGCClipRgn);
    //ASSERT(Dc->rosdc.hClipRgn);
   ASSERT(Dc->prgnVis);
   //hRgnVis = Dc->prgnVis->BaseObject.hHmgr;

   if (Dc->rosdc.hGCClipRgn == NULL)
      Dc->rosdc.hGCClipRgn = IntSysCreateRectRgn(0, 0, 0, 0);

   prgnGCClip = REGION_LockRgn(Dc->rosdc.hGCClipRgn);
   ASSERT(prgnGCClip);

   if (Dc->rosdc.hClipRgn == NULL)
      IntGdiCombineRgn(prgnGCClip, Dc->prgnVis, NULL, RGN_COPY);
   else
   {
      prgnClip = REGION_LockRgn(Dc->rosdc.hClipRgn); // FIXME: Locking order, ugh!
      IntGdiCombineRgn(prgnGCClip, Dc->prgnVis, prgnClip, RGN_AND);
      REGION_UnlockRgn(prgnClip);
   }
   REGION_UnlockRgn(prgnGCClip);

   NtGdiOffsetRgn(Dc->rosdc.hGCClipRgn, Dc->ptlDCOrig.x, Dc->ptlDCOrig.y);

   if((CombinedRegion = RGNOBJAPI_Lock(Dc->rosdc.hGCClipRgn, NULL)))
   {
     CLIPOBJ *CombinedClip;

     CombinedClip = IntEngCreateClipRegion(CombinedRegion->rdh.nCount,
        CombinedRegion->Buffer,
        &CombinedRegion->rdh.rcBound);

     RGNOBJAPI_Unlock(CombinedRegion);

     if ( !CombinedClip )
     {
       DPRINT1("IntEngCreateClipRegion() failed\n");
       return ERROR;
     }

     if(Dc->rosdc.CombinedClip != NULL)
       IntEngDeleteClipRegion(Dc->rosdc.CombinedClip);

      Dc->rosdc.CombinedClip = CombinedClip ;
   }

   return NtGdiOffsetRgn(Dc->rosdc.hGCClipRgn, -Dc->ptlDCOrig.x, -Dc->ptlDCOrig.y);
}

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