Ejemplo n.º 1
0
static
PREGION FASTCALL
DceGetVisRgn(PWND Window, ULONG Flags, HWND hWndChild, ULONG CFlags)
{
    PREGION Rgn;
    Rgn = VIS_ComputeVisibleRegion( Window,
                                    0 == (Flags & DCX_WINDOW),
                                    0 != (Flags & DCX_CLIPCHILDREN),
                                    0 != (Flags & DCX_CLIPSIBLINGS));
    /* Caller expects a non-null region */
    if (!Rgn)
        Rgn = IntSysCreateRectpRgn(0, 0, 0, 0);
    return Rgn;
}
Ejemplo n.º 2
0
/*
 * Fills the CLIPOBJ and client rect of the WNDOBJ with the data from the given WND
 */
BOOLEAN
FASTCALL
IntEngWndUpdateClipObj(
  WNDGDI *WndObjInt,
  PWND Window)
{
  HRGN hVisRgn;
  PROSRGNDATA visRgn;
  CLIPOBJ *ClipObj = NULL;
  CLIPOBJ *OldClipObj;

  DPRINT("IntEngWndUpdateClipObj\n");

  hVisRgn = VIS_ComputeVisibleRegion(Window, TRUE, TRUE, TRUE);
  if (hVisRgn != NULL)
  {
    NtGdiOffsetRgn(hVisRgn, Window->rcClient.left, Window->rcClient.top);
    visRgn = RGNOBJAPI_Lock(hVisRgn, NULL);
    if (visRgn != NULL)
    {
      if (visRgn->rdh.nCount > 0)
      {
        ClipObj = IntEngCreateClipRegion(visRgn->rdh.nCount, visRgn->Buffer,
                                         &visRgn->rdh.rcBound);
        DPRINT("Created visible region with %lu rects\n", visRgn->rdh.nCount);
        DPRINT("  BoundingRect: %d, %d  %d, %d\n",
               visRgn->rdh.rcBound.left, visRgn->rdh.rcBound.top,
               visRgn->rdh.rcBound.right, visRgn->rdh.rcBound.bottom);
        {
          ULONG i;
          for (i = 0; i < visRgn->rdh.nCount; i++)
          {
            DPRINT("  Rect #%lu: %ld,%ld  %ld,%ld\n", i+1,
                   visRgn->Buffer[i].left, visRgn->Buffer[i].top,
                   visRgn->Buffer[i].right, visRgn->Buffer[i].bottom);
          }
        }
      }
      RGNOBJAPI_Unlock(visRgn);
    }
    else
    {
      DPRINT1("Warning: Couldn't lock visible region of window DC\n");
    }
    GreDeleteObject(hVisRgn);
  }
  else
  {
    DPRINT1("Warning: VIS_ComputeVisibleRegion failed!\n");
  }

  if (ClipObj == NULL)
  {
    /* Fall back to client rect */
    ClipObj = IntEngCreateClipRegion(1, &Window->rcClient,
                                     &Window->rcClient);
  }

  if (ClipObj == NULL)
  {
    DPRINT1("Warning: IntEngCreateClipRegion() failed!\n");
    return FALSE;
  }

  RtlCopyMemory(&WndObjInt->WndObj.coClient, ClipObj, sizeof (CLIPOBJ));
  RtlCopyMemory(&WndObjInt->WndObj.rclClient, &Window->rcClient, sizeof (RECT));
  OldClipObj = InterlockedExchangePointer((PVOID*)&WndObjInt->ClientClipObj, ClipObj);
  if (OldClipObj != NULL)
    IntEngDeleteClipRegion(OldClipObj);

  return TRUE;
}