XtAddExposureToRegion


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

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