Amiga Unix — 68040 · 68060

Manual pages › X Window and screen libraries (3X)

XtAddETReg(3X)

merge exposure events into a region

From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.

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 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 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

XWIN 3.0               Last change: 9/1/88                 .ie t

XWIN 3.0               Last change: 9/1/88                 .ie t