XtAddExposureToRegion(3X11)



XtAddExposureToRegion(3X1
C1
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MMAND REFEREXtAddExposureToRegion(3X11)



NAME
     XtAddExposureToRegion - merge exposure events into a region

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

     This is user-contributed.

ARGUMENTS
     event     Specifies a pointer to the Expose or
               GraphicsExpose event.

     region    Specifies the region object (as defined in
               <X11/Xutil.h>).

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 GraphicsExpose 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
























X Version 11            1 September 1988                        1

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