XtAddExposureToRegion(3)         XT FUNCTIONS         XtAddExposureToRegion(3)

NAME
       XtAddExposureToRegion - merge exposure events into a region

SYNTAX
       #include <X11/Intrinsic.h>

       void XtAddExposureToRegion(XEvent *event, Region region);

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 Ex-
       pose or GraphicsExpose event, XtAddExposureToRegion returns without an
       error and without modifying region.

       This function is used by the exposure compression mechanism (see Sec-
       tion 7.9.3).

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

X Version 11                      libXt 1.2.1         XtAddExposureToRegion(3)

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