Редактирование: Qt:Документация 4.3.2/3rdparty

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=Third-Party Licenses Used in Qt<br />=
Qt includes a number of third-party libraries that are used to provide certain features. Unlike other [[Qt:Документация 4.3.2/licenses | third-party code used in Qt]], these libraries are supplied alongside the Qt modules.

Run <tt>configure -help</tt> to see any options that may be available for controlling the use of these libraries.

===FreeType 2 (<tt>freetype</tt>)===
''The [[Qt:Документация 4.3.2/qtopiacore-fonts#freetype | FreeType]] project is a team of volunteers who develop free, portable and high-quality software solutions for digital typography. We specifically target embedded systems and focus on bringing small, efficient and ubiquitous products.'' -- quoted from <tt>3rdparty/freetype/docs/freetype2.html</tt>.

See <tt>src/3rdparty/freetype/docs/FTL.txt</tt> and <tt>src/3rdparty/freetype/docs/GPL.txt</tt> for license details.

See also the files in <tt>src/3rdparty/opentype</tt>, which are used by [[Qt:Документация 4.3.2/qtopiacore-fonts#freetype | FreeType]].

Parts of the [[Qt:Документация 4.3.2/qtopiacore-fonts#freetype | FreeType]] projects have been modified and put into Qt for use in the painting subsystem. These files are ftraster.h, ftraster.c, ftgrays.h and ftgrays.c&#x2e; The following modifications has been made to these files:

*Renamed FT_ and ft_ symbols to QT_FT_ and qt_ft_ to avoid name conflicts.
*Removed parts of code not relevant when compiled with _STANDALONE_ defined.
*Changed behavior in ftraster.c to follow X polygon filling rules.
*Implemented support in ftraster.c for winding / odd even polygon fill rules.
*Replaced bitmap generation with span generation in ftraster.c
*Renamed: ftraster.h to qblackraster_p.h
*Renamed: ftraster.c to qblackraster.c
*Renamed: ftgrays.h to qgrayraster_p.h
*Renamed: ftgrays.c to qgrayraster.c

===HarfBuzz (<tt>harfbuzz</tt>)===
''This is [[#harfbuzz | HarfBuzz]], an OpenType Layout engine.''

''It was derived originally from the OpenType code in [[Qt:Документация 4.3.2/qtopiacore-fonts#freetype | FreeType]]-1.x, ported to FreeType2. (This code has been abandoned for FreeType2, but until something better comes along, should serve our purposes.) In addition to porting to [[Qt:Документация 4.3.2/qtopiacore-fonts#freetype | FreeType]]-2, it has been modified in various other ways.'' -- quoted from <tt>src/3rdparty/harfbuzz/README</tt>.

See <tt>src/3rdparty/harfbuzz/COPYING.FTL</tt> and src/3rdparty/harfbuzz/COPYING.GPL for license details.

===MD5 (<tt>md5.cpp</tt> and <tt>md5.h</tt>)===
''This code implements the MD5 message-digest algorithm. The algorithm is due to Ron Rivest. This code was written by Colin Plumb in 1993, no copyright is claimed. This code is in the public domain; do with it what you wish.'' -- quoted from <tt>src/3rdparty/md5/md5.h</tt>

See <tt>src/3rdparty/md5/md5.cpp</tt> and <tt>src/3rdparty/md5/md5.h</tt> for more information about the terms and conditions under which the code is supplied.

===The Independent JPEG Group's JPEG Software (<tt>libjpeg</tt>)===
''This package contains C software to implement JPEG image compression and decompression. JPEG (pronounced "jay-peg") is a standardized compression method for full-color and gray-scale images. JPEG is intended for compressing "real-world" scenes; line drawings, cartoons and other non-realistic images are not its strong suit. JPEG is lossy, meaning that the output image is not exactly identical to the input image.'' -- quoted from <tt>src/3rdparty/libjpeg/README</tt>.

See <tt>src/3rdparty/libjpeg/README</tt> for license details.

===MNG Library (<tt>libmng</tt>)===
''The libmng library supports decoding, displaying, encoding, and various other manipulations of the Multiple-image Network Graphics (MNG) format image files. It uses the zlib compression library, and optionally the JPEG library by the Independant JPEG Group (IJG) and/or lcms (little cms), a color-management library by Marti Maria Saguer.'' -- quoted from <tt>src/3rdparty/libmng/doc/libmng.txt</tt>

See <tt>src/3rdparty/libmng/LICENSE</tt> for license details.

===PNG Reference Library (<tt>libpng</tt>)===
''Libpng was written as a companion to the PNG specification, as a way of reducing the amount of time and effort it takes to support the PNG file format in application programs.'' -- quoted from <tt>src/3rdparty/libpng/libpng.txt</tt>.

See <tt>src/3rdparty/libpng/LICENSE</tt> for license details.

===TIFF Software Distribution (<tt>libtiff</tt>)===
''libtiff is a set of C functions (a library) that support the manipulation of TIFF image files.'' -- quoted from <tt>src/libtiff/html/libtiff.html</tt>

See <tt>src/3rdparty/libtiff/COPYRIGHT</tt> for license details.

===SQLite (<tt>sqlite</tt>)===
''[[#sqlite | SQLite]] is a small C library that implements a self-contained, embeddable, zero-configuration SQL database engine.'' -- quoted from [http://www.sqlite.org/ www.sqlite.org].

According to the comments in the source files, the code is in the public domain. See the [http://www.sqlite.org/copyright.html SQLite Copyright] page on the [[#sqlite | SQLite]] web site for further information.

===Wintab API (<tt>wintab</tt>)===
Wintab is a de facto API for pointing devices on Windows. The wintab code is from [http://www.pointing.com/WINTAB.HTM http://www.pointing.com/WINTAB.HTM].

See <tt>src/3rdparty/wintab/wintab.h</tt> for license details.

===Data Compression Library (<tt>zlib</tt>)===
''zlib is a general purpose data compression library. All the code is thread safe. The data format used by the zlib library is described by RFCs (Request for Comments) 1950 to 1952'' -- quoted from <tt>src/3rdparty/zlib/README</tt>.

See <tt>src/3rdparty/zlib/README</tt> for license details.

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