[HarfBuzz] Relicensing HarfBuzz
behdad at behdad.org
Tue Jan 15 14:11:09 PST 2008
Between 1998 and 2004 the FreeType project developed an implementation
of the OpenType Layout specification (formerly TrueType Open), called
ftlayout, that eventually was ripped out of FreeType 2 and was
salvaged by Pango and Qt developers and integrated into their layout
engines. The code was further developed by the two projects
separately and was merged back and renamed to HarfBuzz .
The ftlayout code, like the rest of FreeType, was dual-licensed under
GPL+FTL. The license, while quite liberal, posed delicate
incompatibility issues with Pango's LGPL license because of the
so-called advertisement clause in the FTL. The FreeType project was
contacted and asked to consider relicensing ftvalid to resolve this
Recently the FreeType team retroactively relicensed the portions of
ftlayout used in HarfBuzz under a new, simplified, license , and
subsequently, thanks to agreements from Trolltech ASA and Red Hat, Inc.,
the HarfBuzz developers are happy to perform a similar change to
HarfBuzz. We hereby and retroactively relicense HarfBuzz under the
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the
above copyright notice and the following two paragraphs appear in
all copies of this software.
IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
The license is commonly known as "Old-Style" MIT and is more liberal
than both GPL and FTL. Obviously, this change is only limited to the
code from us and does not automatically extend to developments made by
others on top of HarfBuzz.
The master branch of the HarfBuzz git repository holds this change as
of a few minutes ago. Users are encouraged to update source files of
their copies if they would like to use the code under the new license.
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