XtAddETReg(3Xt) — Dell System V Release 4 Issue 2.2



XtAddExposureToRegion(3Xt)  X Version 11(Release 3)  XtAddExposureToRegion(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 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




























10/89                                                                    Page 1
Museum
