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XtAddExposureToRegion(3Xt)	XT FUNCTIONS	   XtAddExposureToRegion(3Xt)



NAME
  XtAddExposureToRegion - merge exposure events into a region

SYNTAX
  void XtAddExposureToRegion(event, region)
       XEvent *event;
       Region region;

ARGUMENTS

  event	    Specifies a pointer to the Expose or GraphicsExpose event.

  region    Specifies the region object (as defined in &lt;X11/Xutil.h&gt;).

DESCRIPTION
  The XtAddExposureToRegion function computes the union of the rectangle
  defined by the exposure event and the specified region.  Then, it stores
  the results back in region.  If the event argument is not an Expose or Gra-
  phicsExpose event, XtAddExposureToRegion returns without an error and
  without modifying region.

  This function is used by the exposure compression mechanism (see Section
  7.9.3).

SEE ALSO
  X Toolkit Intrinsics - C Language Interface
  Xlib - C Language X Interface
































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