- Qt 5.15
- Qt GUI
- X Server helper
- Qt 5.15.18 Reference Documentation

# X Server helper

Code from X11's region.h, Region.c, poly.h, and PolyReg.c

Used in Qt GUI (QRegion).

The sources can be found in work/qtbase-everywhere-src-5.15.18/src/gui/painting/qregion.cpp.

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     Copyright (c) 1987, 1988 X Consortium
     Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.

X11 License and Historical Permission Notice and Disclaimer.

     Copyright (c) 1987, 1988  X Consortium

     Permission is hereby granted, free of charge, to any person obtaining a copy
     of this software and associated documentation files (the "Software"), to deal
     in the Software without restriction, including without limitation the rights
     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     copies of the Software, and to permit persons to whom the Software is
     furnished to do so, subject to the following conditions:

     The above copyright notice and this permission notice shall be included in
     all copies or substantial portions of the Software.

     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
     X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
     AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

     Except as contained in this notice, the name of the X Consortium shall not be
     used in advertising or otherwise to promote the sale, use or other dealings
     in this Software without prior written authorization from the X Consortium.

     Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.

                             All Rights Reserved

     Permission to use, copy, modify, and distribute this software and its
     documentation for any purpose and without fee is hereby granted,
     provided that the above copyright notice appear in all copies and that
     both that copyright notice and this permission notice appear in
     supporting documentation, and that the name of Digital not be
     used in advertising or publicity pertaining to distribution of the
     software without specific, written prior permission.

     DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
     ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
     DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
     ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
     WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
     ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
     SOFTWARE.