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2 classes in the SolidWidgets framework make use of the following open source libraries:

Libharu:

Author License Terms:

    Copyright (C) 1999-2006 Takeshi Kanno
    This software is provided 'as-is', without any express or implied warranty.

    In no event will the authors be held liable for any damages arising from the 
    use of this software.

    Permission is granted to anyone to use this software for any purpose,including 
    commercial applications, and to alter it and redistribute it freely, subject to 
    the following restrictions:

       1. The origin of this software must not be misrepresented; you must not claim 
       that you wrote the original software. If you use this software in a product, 
       an acknowledgment in the product documentation would be appreciated but is 
       not required.
       2. Altered source versions must be plainly marked as such, and must not be 
       misrepresented as being the original software.
       3. This notice may not be removed or altered from any source distribution.

Zlib:

Author License Terms:

    Copyright (C) 1995-2004 Jean-loup Gailly and Mark Adler

      This software is provided 'as-is', without any express or implied
      warranty.  In no event will the authors be held liable for any damages
      arising from the use of this software.

      Permission is granted to anyone to use this software for any purpose,
      including commercial applications, and to alter it and redistribute it
      freely, subject to the following restrictions:

      1. The origin of this software must not be misrepresented; you must not
         claim that you wrote the original software. If you use this software
         in a product, an acknowledgment in the product documentation would be
         appreciated but is not required.
      2. Altered source versions must be plainly marked as such, and must not be
         misrepresented as being the original software.
      3. This notice may not be removed or altered from any source distribution.

Libpng:

Author License Terms:

    This copy of the libpng notices is provided for your convenience.  In case of
    any discrepancy between this copy and the notices in the file png.h that is
    included in the libpng distribution, the latter shall prevail.

    COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:

    If you modify libpng you may insert additional notices immediately following
    this sentence.

    This code is released under the libpng license.

    libpng versions 1.2.6, August 15, 2004, through 1.5.7, December 15, 2011, are
    Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
    distributed according to the same disclaimer and license as libpng-1.2.5
    with the following individual added to the list of Contributing Authors

       Cosmin Truta

    libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
    Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
    distributed according to the same disclaimer and license as libpng-1.0.6
    with the following individuals added to the list of Contributing Authors

       Simon-Pierre Cadieux
       Eric S. Raymond
       Gilles Vollant

    and with the following additions to the disclaimer:

       There is no warranty against interference with your enjoyment of the
       library or against infringement.  There is no warranty that our
       efforts or the library will fulfill any of your particular purposes
       or needs.  This library is provided with all faults, and the entire
       risk of satisfactory quality, performance, accuracy, and effort is with
       the user.

    libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
    Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are
    distributed according to the same disclaimer and license as libpng-0.96,
    with the following individuals added to the list of Contributing Authors:

       Tom Lane
       Glenn Randers-Pehrson
       Willem van Schaik

    libpng versions 0.89, June 1996, through 0.96, May 1997, are
    Copyright (c) 1996, 1997 Andreas Dilger
    Distributed according to the same disclaimer and license as libpng-0.88,
    with the following individuals added to the list of Contributing Authors:

       John Bowler
       Kevin Bracey
       Sam Bushell
       Magnus Holmgren
       Greg Roelofs
       Tom Tanner

    libpng versions 0.5, May 1995, through 0.88, January 1996, are
    Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.

    For the purposes of this copyright and license, "Contributing Authors"
    is defined as the following set of individuals:

       Andreas Dilger
       Dave Martindale
       Guy Eric Schalnat
       Paul Schmidt
       Tim Wegner

    The PNG Reference Library is supplied "AS IS".  The Contributing Authors
    and Group 42, Inc. disclaim all warranties, expressed or implied,
    including, without limitation, the warranties of merchantability and of
    fitness for any purpose.  The Contributing Authors and Group 42, Inc.
    assume no liability for direct, indirect, incidental, special, exemplary,
    or consequential damages, which may result from the use of the PNG
    Reference Library, even if advised of the possibility of such damage.

    Permission is hereby granted to use, copy, modify, and distribute this
    source code, or portions hereof, for any purpose, without fee, subject
    to the following restrictions:

    1. The origin of this source code must not be misrepresented.

    2. Altered versions must be plainly marked as such and must not
       be misrepresented as being the original source.

    3. This Copyright notice may not be removed or altered from any
       source or altered source distribution.

    The Contributing Authors and Group 42, Inc. specifically permit, without
    fee, and encourage the use of this source code as a component to
    supporting the PNG file format in commercial products.  If you use this
    source code in a product, acknowledgment is not required but would be
    appreciated.


    A "png_get_copyright" function is available, for convenient use in "about"
    boxes and the like:

       printf("%s",png_get_copyright(NULL));

    Also, the PNG logo (in PNG format, of course) is supplied in the
    files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).

    Libpng is OSI Certified Open Source Software.  OSI Certified Open Source is a
    certification mark of the Open Source Initiative.

    Glenn Randers-Pehrson
    glennrp at users.sourceforge.net
    December 15, 2011