xtaddexposuretoregion(3xt) osf1 man page | unix.com

XtAddExposureToRegion(3Xt)												XtAddExposureToRegion(3Xt)

NAME
       XtAddExposureToRegion - merge exposure events into a region

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

ARGUMENTS
       Specifies a pointer to the Expose or GraphicsExpose event.  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

															XtAddExposureToRegion(3Xt)