XtAddExposureToRegion man page on BSDi

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XtAddExposureToRegion(3Xt) XT FUNCTIONSXtAddExposureToRegion(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 GraphicsEx-
		 pose 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 speci-
       fied 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 mecha-
       nism (see Section 7.9.3).

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

X Version 11		Release 6.4				1

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