XtAddExposureToRegion man page on DigitalUNIX

XtAddExposureToRegion man page on DigitalUNIX

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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  Sec‐
       tion 7.9.3).

SEE ALSO
       X Toolkit Intrinsics -- C Language Interface

       Xlib -- C Language X Interface

						    XtAddExposureToRegion(3Xt)

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