Qt 5.9 | Qt GUI | LibPNG

Qt 5.9.9 Reference Documentation

# LibPNG

libpng is the official PNG reference library.

Used in the qpng image plugin. Configure with -system-png or -no-png to avoid.

The sources can be found in qtbase-opensource-src-5.9.9/src/3rdparty/libpng.

Project Homepage, upstream version: 1.6.37

      Copyright (c) 1998-2018 Glenn Randers-Pehrson
      Copyright (c) 2000-2017 Simon-Pierre Cadieux
      Copyright (c) 2000-2017 Eric S. Raymond
      Copyright (c) 2000-2017 Mans Rullgard
      Copyright (c) 2000-2019 Cosmin Truta
      Copyright (c) 2000-2017 Gilles Vollant
      Copyright (c) 2000-2017 James Yu
      Copyright (c) 2000-2017 Mandar Sahastrabuddhe
      Copyright (c) 1998-2000 Tom Lane
      Copyright (c) 1998-2000 Willem van Schaik
      Copyright (c) 1996-1997 Andreas Dilger
      Copyright (c) 1996-1997 John Bowler
      Copyright (c) 1996-1997 Kevin Bracey
      Copyright (c) 1996-1997 Sam Bushell
      Copyright (c) 1996-1997 Magnus Holmgren
      Copyright (c) 1996-1997 Greg Roelofs
      Copyright (c) 1996-1997 Tom Tanner
      Copyright (c) 1995-1996 Dave Martindale
      Copyright (c) 1995-1996 Paul Schmidt
      Copyright (c) 1995-1996 Tim Wegner
      Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.

libpng License and libpng License 2.

      COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
      =========================================

      PNG Reference Library License version 2
      ---------------------------------------

       * Copyright (c) 1995-2019 The PNG Reference Library Authors.
       * Copyright (c) 2018-2019 Cosmin Truta.
       * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson.
       * Copyright (c) 1996-1997 Andreas Dilger.
       * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.

      The software is supplied "as is", without warranty of any kind,
      express or implied, including, without limitation, the warranties
      of merchantability, fitness for a particular purpose, title, and
      non-infringement.  In no event shall the Copyright owners, or
      anyone distributing the software, be liable for any damages or
      other liability, whether in contract, tort or otherwise, arising
      from, out of, or in connection with the software, or the use or
      other dealings in the software, even if advised of the possibility
      of such damage.

      Permission is hereby granted to use, copy, modify, and distribute
      this software, or portions hereof, for any purpose, without fee,
      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 Copyright notice may not be removed or altered from any
          source or altered source distribution.

      PNG Reference Library License version 1 (for libpng 0.5 through 1.6.35)
      -----------------------------------------------------------------------

      libpng versions 1.0.7, July 1, 2000, through 1.6.35, July 15, 2018 are
      Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, are
      derived from libpng-1.0.6, 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
          Mans Rullgard
          Cosmin Truta
          Gilles Vollant
          James Yu
          Mandar Sahastrabuddhe
          Google Inc.
          Vadim Barkov

      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.

      Some files in the "contrib" directory and some configure-generated
      files that are distributed with libpng have other copyright owners, and
      are released under other open source licenses.

      libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
      Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
      libpng-0.96, 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, are derived from libpng-0.88,
      and are 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

      Some files in the "scripts" directory have other copyright owners,
      but are released under this license.

      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.