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Tools to manipulate font files

Project description

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What is this?
~~~~~~~~~~~~~

| fontTools is a library for manipulating fonts, written in Python. The
project includes the TTX tool, that can convert TrueType and OpenType
fonts to and from an XML text format, which is also called TTX. It
supports TrueType, OpenType, AFM and to an extent Type 1 and some
Mac-specific formats. The project has a `BSD-style open-source
licence <LICENSE>`__.
| Among other things this means you can use it free of charge.

Installation
~~~~~~~~~~~~

FontTools requires `Python <http://www.python.org/download/>`__ 2.7, 3.4
or later.

The package is listed in the Python Package Index (PyPI), so you can
install it with `pip <https://pip.pypa.io>`__:

.. code:: sh

pip install fonttools

If you would like to contribute to its development, you can clone the
repository from Github, install the package in 'editable' mode and
modify the source code in place. We recommend creating a virtual
environment, using `virtualenv <https://virtualenv.pypa.io>`__ or
Python 3 `venv <https://docs.python.org/3/library/venv.html>`__ module.

.. code:: sh

# download the source code to 'fonttools' folder
git clone https://github.com/fonttools/fonttools.git
cd fonttools

# create new virtual environment called e.g. 'fonttools-venv', or anything you like
python -m virtualenv fonttools-venv

# source the `activate` shell script to enter the environment (Un\*x); to exit, just type `deactivate`
. fonttools-venv/bin/activate

# to activate the virtual environment in Windows `cmd.exe`, do
fonttools-venv\Scripts\activate.bat

# install in 'editable' mode
pip install -e .

TTX – From OpenType and TrueType to XML and Back
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Once installed you can use the ``ttx`` command to convert binary font
files (``.otf``, ``.ttf``, etc) to the TTX xml format, edit them, and
convert them back to binary format. TTX files have a .ttx file
extension.

.. code:: sh

ttx /path/to/font.otf
ttx /path/to/font.ttx

The TTX application works can be used in two ways, depending on what
platform you run it on:

- As a command line tool (Windows/DOS, Unix, MacOSX)
- By dropping files onto the application (Windows, MacOS)

TTX detects what kind of files it is fed: it will output a ``.ttx`` file
when it sees a ``.ttf`` or ``.otf``, and it will compile a ``.ttf`` or
``.otf`` when the input file is a ``.ttx`` file. By default, the output
file is created in the same folder as the input file, and will have the
same name as the input file but with a different extension. TTX will
*never* overwrite existing files, but if necessary will append a unique
number to the output filename (before the extension) such as
``Arial#1.ttf``

When using TTX from the command line there are a bunch of extra options,
these are explained in the help text, as displayed when typing
``ttx -h`` at the command prompt. These additional options include:

- specifying the folder where the output files are created
- specifying which tables to dump or which tables to exclude
- merging partial ``.ttx`` files with existing ``.ttf`` or ``.otf``
files
- listing brief table info instead of dumping to ``.ttx``
- splitting tables to separate ``.ttx`` files
- disabling TrueType instruction disassembly

The TTX file format
-------------------

The following tables are currently supported:

.. begin table list
.. code::

BASE, CBDT, CBLC, CFF, CFF2, COLR, CPAL, DSIG, EBDT, EBLC, FFTM,
Feat, GDEF, GMAP, GPKG, GPOS, GSUB, Glat, Gloc, HVAR, JSTF, LTSH,
MATH, META, MVAR, OS/2, SING, STAT, SVG, Silf, Sill, TSI0, TSI1,
TSI2, TSI3, TSI5, TSIB, TSID, TSIJ, TSIP, TSIS, TSIV, TTFA, VDMX,
VORG, VVAR, ankr, avar, bsln, cidg, cmap, cvar, cvt, feat, fpgm,
fvar, gasp, gcid, glyf, gvar, hdmx, head, hhea, hmtx, kern, lcar,
loca, ltag, maxp, meta, mort, morx, name, opbd, post, prep, prop,
sbix, trak, vhea and vmtx
.. end table list

Other tables are dumped as hexadecimal data.

TrueType fonts use glyph indices (GlyphIDs) to refer to glyphs in most
places. While this is fine in binary form, it is really hard to work
with for humans. Therefore we use names instead.

The glyph names are either extracted from the ``CFF`` table or the
``post`` table, or are derived from a Unicode ``cmap`` table. In the
latter case the Adobe Glyph List is used to calculate names based on
Unicode values. If all of these methods fail, names are invented based
on GlyphID (eg ``glyph00142``)

It is possible that different glyphs use the same name. If this happens,
we force the names to be unique by appending ``#n`` to the name (``n``
being an integer number.) The original names are being kept, so this has
no influence on a "round tripped" font.

Because the order in which glyphs are stored inside the binary font is
important, we maintain an ordered list of glyph names in the font.

Other Tools
~~~~~~~~~~~

Commands for inspecting, merging and subsetting fonts are also
available:

.. code:: sh

pyftinspect
pyftmerge
pyftsubset

fontTools Python Module
~~~~~~~~~~~~~~~~~~~~~~~

The fontTools python module provides a convenient way to
programmatically edit font files.

.. code:: py

>>> from fontTools.ttLib import TTFont
>>> font = TTFont('/path/to/font.ttf')
>>> font
<fontTools.ttLib.TTFont object at 0x10c34ed50>
>>>

A selection of sample python programs is in the
`Snippets <https://github.com/fonttools/fonttools/blob/master/Snippets/>`__
directory.

Optional Requirements
---------------------

The ``fontTools`` package currently has no (required) external dependencies
besides the modules included in the Python Standard Library.
However, a few extra dependencies are required by some of its modules, which
are needed to unlock optional features.

- ``Lib/fontTools/ttLib/woff2.py``

Module to compress/decompress WOFF 2.0 web fonts; it requires:

- `brotli <https://pypi.python.org/pypi/Brotli>`__: Python bindings of
the Brotli compression library.

- ``Lib/fontTools/ttLib/sfnt.py``

To better compress WOFF 1.0 web fonts, the following module can be used
instead of the built-in ``zlib`` library:

- `zopfli <https://pypi.python.org/pypi/zopfli>`__: Python bindings of
the Zopfli compression library.

- ``Lib/fontTools/unicode.py``

To display the Unicode character names when dumping the ``cmap`` table
with ``ttx`` we use the ``unicodedata`` module in the Standard Library.
The version included in there varies between different Python versions.
To use the latest available data, you can install:

- `unicodedata2 <https://pypi.python.org/pypi/unicodedata2>`__:
``unicodedata`` backport for Python 2.7 and 3.5 updated to the latest
Unicode version 9.0. Note this is not necessary if you use Python 3.6
as the latter already comes with an up-to-date ``unicodedata``.

- ``Lib/fontTools/varLib/interpolatable.py``

Module for finding wrong contour/component order between different masters.
It requires one of the following packages in order to solve the so-called
"minimum weight perfect matching problem in bipartite graphs", or
the Assignment problem:

* `scipy <https://pypi.python.org/pypi/scipy>`__: the Scientific Library
for Python, which internally uses `NumPy <https://pypi.python.org/pypi/numpy>`__
arrays and hence is very fast;
* `munkres <https://pypi.python.org/pypi/munkres>`__: a pure-Python
module that implements the Hungarian or Kuhn-Munkres algorithm.

- ``Lib/fontTools/misc/symfont.py``

Advanced module for symbolic font statistics analysis; it requires:

* `sympy <https://pypi.python.org/pypi/sympy>`__: the Python library for
symbolic mathematics.

- ``Lib/fontTools/t1Lib.py``

To get the file creator and type of Macintosh PostScript Type 1 fonts
on Python 3 you need to install the following module, as the old ``MacOS``
module is no longer included in Mac Python:

* `xattr <https://pypi.python.org/pypi/xattr>`__: Python wrapper for
extended filesystem attributes (macOS platform only).

- ``Lib/fontTools/pens/cocoaPen.py``

Pen for drawing glyphs with Cocoa ``NSBezierPath``, requires:

* `PyObjC <https://pypi.python.org/pypi/pyobjc>`__: the bridge between
Python and the Objective-C runtime (macOS platform only).

- ``Lib/fontTools/pens/qtPen.py``

Pen for drawing glyphs with Qt's ``QPainterPath``, requires:

* `PyQt5 <https://pypi.python.org/pypi/PyQt5>`__: Python bindings for
the Qt cross platform UI and application toolkit.

- ``Lib/fontTools/pens/reportLabPen.py``

Pen to drawing glyphs as PNG images, requires:

* `reportlab <https://pypi.python.org/pypi/reportlab>`__: Python toolkit
for generating PDFs and graphics.

- ``Lib/fontTools/inspect.py``

A GUI font inspector, requires one of the following packages:

* `PyGTK <https://pypi.python.org/pypi/PyGTK>`__: Python bindings for
GTK  2.x (only works with Python 2).
* `PyGObject <https://wiki.gnome.org/action/show/Projects/PyGObject>`__ :
Python bindings for GTK 3.x and gobject-introspection libraries (also
compatible with Python 3).

Testing
~~~~~~~

To run the test suite, you can do:

.. code:: sh

python setup.py test

If you have `pytest <http://docs.pytest.org/en/latest/>`__, you can run
the ``pytest`` command directly. The tests will run against the
installed ``fontTools`` package, or the first one found in the
``PYTHONPATH``.

You can also use `tox <https://testrun.org/tox/latest/>`__ to
automatically run tests on different Python versions in isolated virtual
environments.

.. code:: sh

pip install tox
tox

Note that when you run ``tox`` without arguments, the tests are executed
for all the environments listed in tox.ini's ``envlist``. In our case,
this includes Python 2.7 and 3.6, so for this to work the ``python2.7``
and ``python3.6`` executables must be available in your ``PATH``.

You can specify an alternative environment list via the ``-e`` option,
or the ``TOXENV`` environment variable:

.. code:: sh

tox -e py27-nocov
TOXENV="py36-cov,htmlcov" tox

Development Community
~~~~~~~~~~~~~~~~~~~~~

TTX/FontTools development is ongoing in an active community of
developers, that includes professional developers employed at major
software corporations and type foundries as well as hobbyists.

Feature requests and bug reports are always welcome at
https://github.com/fonttools/fonttools/issues/

The best place for discussions about TTX from an end-user perspective as
well as TTX/FontTools development is the
https://groups.google.com/d/forum/fonttools mailing list. There is also
a development https://groups.google.com/d/forum/fonttools-dev mailing
list for continuous integration notifications. You can also email Behdad
privately at behdad@behdad.org

History
~~~~~~~

The fontTools project was started by Just van Rossum in 1999, and was
maintained as an open source project at
http://sourceforge.net/projects/fonttools/. In 2008, Paul Wise (pabs3)
began helping Just with stability maintenance. In 2013 Behdad Esfahbod
began a friendly fork, thoroughly reviewing the codebase and making
changes at https://github.com/behdad/fonttools to add new features and
support for new font formats.

Acknowledgements
~~~~~~~~~~~~~~~~

In alphabetical order:

Olivier Berten, Samyak Bhuta, Erik van Blokland, Petr van Blokland,
Jelle Bosma, Sascha Brawer, Tom Byrer, Frédéric Coiffier, Vincent
Connare, Dave Crossland, Simon Daniels, Behdad Esfahbod, Behnam
Esfahbod, Hannes Famira, Sam Fishman, Matt Fontaine, Yannis Haralambous,
Greg Hitchcock, Jeremie Hornus, Khaled Hosny, John Hudson, Denis Moyogo
Jacquerye, Jack Jansen, Tom Kacvinsky, Jens Kutilek, Antoine Leca,
Werner Lemberg, Tal Leming, Peter Lofting, Cosimo Lupo, Masaya Nakamura,
Dave Opstad, Laurence Penney, Roozbeh Pournader, Garret Rieger, Read
Roberts, Guido van Rossum, Just van Rossum, Andreas Seidel, Georg
Seifert, Miguel Sousa, Adam Twardoch, Adrien Tétar, Vitaly Volkov, Paul
Wise.

Copyrights
~~~~~~~~~~

| Copyright (c) 1999-2004 Just van Rossum, LettError
(just@letterror.com)
| See `LICENSE <LICENSE>`__ for the full license.

Copyright (c) 2000 BeOpen.com. All Rights Reserved.

Copyright (c) 1995-2001 Corporation for National Research Initiatives.
All Rights Reserved.

Copyright (c) 1991-1995 Stichting Mathematisch Centrum, Amsterdam. All
Rights Reserved.

Have fun!

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Changelog
~~~~~~~~~

3.20.0 (released 2017-11-21)
----------------------------

- [unicodedata] Addded new module ``fontTools.unicodedata`` which exports the
same interface as the built-in ``unicodedata`` module, with the addition of
a few functions that are missing from the latter, such as ``script``,
``script_extension`` and ``block``. Added a ``MetaTools/buildUCD.py`` script
to download and parse data files from the Unicode Character Database and
generate python modules containing lists of ranges and property values.
- [feaLib] Added ``__str__`` method to all ``ast`` elements (delegates to the
``asFea`` method).
- [feaLib] ``Parser`` constructor now accepts a ``glyphNames`` iterable
instead of ``glyphMap`` dict. The latter still works but with a pending
deprecation warning (#1104).
- [bezierTools] Added arc length calculation functions originally from
``pens.perimeterPen`` module (#1101).
- [varLib] Started generating STAT table (8af4309). Right now it just reflects
the axes, and even that with certain limitations:
* AxisOrdering is set to the order axes are defined,
* Name-table entries are not shared with fvar.
- [py23] Added backports for ``redirect_stdout`` and ``redirect_stderr``
context managers (#1097).
- [Graphite] Fixed some round-trip bugs (#1093).

3.19.0 (released 2017-11-06)
----------------------------

- [varLib] Try set of used points instead of all points when testing whether to
share points between tuples (#1090).
- [CFF2] Fixed issue with reading/writing PrivateDict BlueValues to TTX file.
Read the commit message 8b02b5a and issue #1030 for more details.
NOTE: this change invalidates all the TTX files containing CFF2 tables
that where dumped with previous verisons of fonttools.
CFF2 Subr items can have values on the stack after the last operator, thus
a ``CFF2Subr`` class was added to accommodate this (#1091).
- [_k_e_r_n] Fixed compilation of AAT kern version=1.0 tables (#1089, #1094)
- [ttLib] Added getBestCmap() convenience method to TTFont class and cmap table
class that returns a preferred Unicode cmap subtable given a list of options
(#1092).
- [morx] Emit more meaningful subtable flags. Implement InsertionMorphAction

3.18.0 (released 2017-10-30)
----------------------------

- [feaLib] Fixed writing back nested glyph classes (#1086).
- [TupleVariation] Reactivated shared points logic, bugfixes (#1009).
- [AAT] Implemented ``morx`` ligature subtables (#1082).
- [reverseContourPen] Keep duplicate lineTo following a moveTo (#1080,
https://github.com/googlei18n/cu2qu/issues/51).
- [varLib.mutator] Suport instantiation of GPOS, GDEF and MVAR (#1079).
- [sstruct] Fixed issue with ``unicode_literals`` and ``struct`` module in
old versions of python 2.7 (#993).

3.17.0 (released 2017-10-16)
----------------------------

- [svgPathPen] Added an ``SVGPathPen`` that translates segment pen commands
into SVG path descriptions. Copied from Tal Leming's ``ufo2svg.svgPathPen``
https://github.com/typesupply/ufo2svg/blob/d69f992/Lib/ufo2svg/svgPathPen.py
- [reverseContourPen] Added ``ReverseContourPen``, a filter pen that draws
contours with the winding direction reversed, while keeping the starting
point (#1071).
- [filterPen] Added ``ContourFilterPen`` to manipulate contours as a whole
rather than segment by segment.
- [arrayTools] Added ``Vector`` class to apply math operations on an array
of numbers, and ``pairwise`` function to loop over pairs of items in an
iterable.
- [varLib] Added support for building and interpolation of ``cvar`` table
(f874cf6, a25a401).

3.16.0 (released 2017-10-03)
----------------------------

- [head] Try using ``SOURCE_DATE_EPOCH`` environment variable when setting
the ``head`` modified timestamp to ensure reproducible builds (#1063).
See https://reproducible-builds.org/specs/source-date-epoch/
- [VTT] Decode VTT's ``TSI*`` tables text as UTF-8 (#1060).
- Added support for Graphite font tables: Feat, Glat, Gloc, Silf and Sill.
Thanks @mhosken! (#1054).
- [varLib] Default to using axis "name" attribute if "labelname" element
is missing (588f524).
- [merge] Added support for merging Script records. Remove unused features
and lookups after merge (d802580, 556508b).
- Added ``fontTools.svgLib`` package. Includes a parser for SVG Paths that
supports the Pen protocol (#1051). Also, added a snippet to convert SVG
outlines to UFO GLIF (#1053).
- [AAT] Added support for ``ankr``, ``bsln``, ``mort``, ``morx``, ``gcid``,
and ``cidg``.
- [subset] Implemented subsetting of ``prop``, ``opbd``, ``bsln``, ``lcar``.

3.15.1 (released 2017-08-18)
----------------------------

- [otConverters] Implemented ``__add__`` and ``__radd__`` methods on
``otConverters._LazyList`` that decompile a lazy list before adding
it to another list or ``_LazyList`` instance. Fixes an ``AttributeError``
in the ``subset`` module when attempting to sum ``_LazyList`` objects
(6ef48bd2, 1aef1683).
- [AAT] Support the `opbd` table with optical bounds (a47f6588).
- [AAT] Support `prop` table with glyph properties (d05617b4).


3.15.0 (released 2017-08-17)
----------------------------

- [AAT] Added support for AAT lookups. The ``lcar`` table can be decompiled
and recompiled; futher work needed to handle ``morx`` table (#1025).
- [subset] Keep (empty) DefaultLangSys for Script 'DFLT' (6eb807b5).
- [subset] Support GSUB/GPOS.FeatureVariations (fe01d87b).
- [varLib] In ``models.supportScalars``, ignore an axis when its peak value
is 0 (fixes #1020).
- [varLib] Add default mappings to all axes in avar to fix rendering issue
in some rasterizers (19c4b377, 04eacf13).
- [varLib] Flatten multiple tail PairPosFormat2 subtables before merging
(c55ef525).
- [ttLib] Added support for recalculating font bounding box in ``CFF`` and
``head`` tables, and min/max values in ``hhea`` and ``vhea`` tables (#970).

3.14.0 (released 2017-07-31)
----------------------------

- [varLib.merger] Remove Extensions subtables before merging (f7c20cf8).
- [varLib] Initialize the avar segment map with required default entries
(#1014).
- [varLib] Implemented optimal IUP optmiziation (#1019).
- [otData] Add ``AxisValueFormat4`` for STAT table v1.2 from OT v1.8.2
(#1015).
- [name] Fixed BCP46 language tag for Mac langID=9: 'si' -> 'sl'.
- [subset] Return value from ``_DehintingT2Decompiler.op_hintmask``
(c0d672ba).
- [cffLib] Allow to get TopDict by index as well as by name (dca96c9c).
- [cffLib] Removed global ``isCFF2`` state; use one set of classes for
both CFF and CFF2, maintaining backward compatibility existing code (#1007).
- [cffLib] Deprecated maxstack operator, per OpenType spec update 1.8.1.
- [cffLib] Added missing default (-100) for UnderlinePosition (#983).
- [feaLib] Enable setting nameIDs greater than 255 (#1003).
- [varLib] Recalculate ValueFormat when merging SinglePos (#996).
- [varLib] Do not emit MVAR if there are no entries in the variation store
(#987).
- [ttx] For ``-x`` option, pad with space if table tag length is < 4.

3.13.1 (released 2017-05-30)
----------------------------

- [feaLib.builder] Removed duplicate lookups optimization. The original
lookup order and semantics of the feature file are preserved (#976).

3.13.0 (released 2017-05-24)
----------------------------

- [varLib.mutator] Implement IUP optimization (#969).
- [_g_l_y_f.GlyphCoordinates] Changed ``__bool__()`` semantics to match those
of other iterables (e46f949). Removed ``__abs__()`` (3db5be2).
- [varLib.interpolate_layout] Added ``mapped`` keyword argument to
``interpolate_layout`` to allow disabling avar mapping: if False (default),
the location is mapped using the map element of the axes in designspace file;
if True, it is assumed that location is in designspace's internal space and
no mapping is performed (#950, #975).
- [varLib.interpolate_layout] Import designspace-loading logic from varLib.
- [varLib] Fixed bug with recombining PairPosClass2 subtables (81498e5, #914).
- [cffLib.specializer] When copying iterables, cast to list (462b7f86).

3.12.1 (released 2017-05-18)
----------------------------

- [pens.t2CharStringPen] Fixed AttributeError when calling addComponent in
T2CharStringPen (#965).

3.12.0 (released 2017-05-17)
----------------------------

- [cffLib.specializer] Added new ``specializer`` module to optimize CFF
charstrings, used by the T2CharStringPen (#948).
- [varLib.mutator] Sort glyphs by component depth before calculating composite
glyphs' bounding boxes to ensure deltas are correctly caclulated (#945).
- [_g_l_y_f] Fixed loss of precision in GlyphCoordinates by using 'd' (double)
instead of 'f' (float) as ``array.array`` typecode (#963, #964).

3.11.0 (released 2017-05-03)
----------------------------

- [t2CharStringPen] Initial support for specialized Type2 path operators:
vmoveto, hmoveto, vlineto, hlineto, vvcurveto, hhcurveto, vhcurveto and
hvcurveto. This should produce more compact charstrings (#940, #403).
- [Doc] Added Sphinx sources for the documentation. Thanks @gferreira (#935).
- [fvar] Expose flags in XML (#932)
- [name] Add helper function for building multi-lingual names (#921)
- [varLib] Fixed kern merging when a PairPosFormat2 has ClassDef1 with glyphs
that are NOT present in the Coverage (1b5e1c4, #939).
- [varLib] Fixed non-deterministic ClassDef order with PY3 (f056c12, #927).
- [feLib] Throw an error when the same glyph is defined in multiple mark
classes within the same lookup (3e3ff00, #453).

3.10.0 (released 2017-04-14)
----------------------------

- [varLib] Added support for building ``avar`` table, using the designspace
``<map>`` elements.
- [varLib] Removed unused ``build(..., axisMap)`` argument. Axis map should
be specified in designspace file now. We do not accept nonstandard axes
if ``<axes>`` element is not present.
- [varLib] Removed "custom" axis from the ``standard_axis_map``. This was
added before when glyphsLib was always exporting the (unused) custom axis.
- [varLib] Added partial support for building ``MVAR`` table; does not
implement ``gasp`` table variations yet.
- [pens] Added FilterPen base class, for pens that control another pen;
factored out ``addComponent`` method from BasePen into a separate abstract
DecomposingPen class; added DecomposingRecordingPen, which records
components decomposed as regular contours.
- [TSI1] Fixed computation of the textLength of VTT private tables (#913).
- [loggingTools] Added ``LogMixin`` class providing a ``log`` property to
subclasses, which returns a ``logging.Logger`` named after the latter.
- [loggingTools] Added ``assertRegex`` method to ``CapturingLogHandler``.
- [py23] Added backport for python 3's ``types.SimpleNamespace`` class.
- [EBLC] Fixed issue with python 3 ``zip`` iterator.

3.9.2 (released 2017-04-08)
---------------------------

- [pens] Added pen to draw glyphs using WxPython ``GraphicsPath`` class:
https://wxpython.org/docs/api/wx.GraphicsPath-class.html
- [varLib.merger] Fixed issue with recombining multiple PairPosFormat2
subtables (#888)
- [varLib] Do not encode gvar deltas that are all zeroes, or if all values
are smaller than tolerance.
- [ttLib] _TTGlyphSet glyphs now also have ``height`` and ``tsb`` (top
side bearing) attributes from the ``vmtx`` table, if present.
- [glyf] In ``GlyphCoordintes`` class, added ``__bool__`` / ``__nonzero__``
methods, and ``array`` property to get raw array.
- [ttx] Support reading TTX files with BOM (#896)
- [CFF2] Fixed the reporting of the number of regions in the font.

3.9.1 (released 2017-03-20)
---------------------------

- [varLib.merger] Fixed issue while recombining multiple PairPosFormat2
subtables if they were split because of offset overflows (9798c30).
- [varLib.merger] Only merge multiple PairPosFormat1 subtables if there is
at least one of the fonts with a non-empty Format1 subtable (0f5a46b).
- [varLib.merger] Fixed IndexError with empty ClassDef1 in PairPosFormat2
(aad0d46).
- [varLib.merger] Avoid reusing Class2Record (mutable) objects (e6125b3).
- [varLib.merger] Calculate ClassDef1 and ClassDef2's Format when merging
PairPosFormat2 (23511fd).
- [macUtils] Added missing ttLib import (b05f203).

3.9.0 (released 2017-03-13)
---------------------------

- [feaLib] Added (partial) support for parsing feature file comments ``# ...``
appearing in between statements (#879).
- [feaLib] Cleaned up syntax tree for FeatureNames.
- [ttLib] Added support for reading/writing ``CFF2`` table (thanks to
@readroberts at Adobe), and ``TTFA`` (ttfautohint) table.
- [varLib] Fixed regression introduced with 3.8.0 in the calculation of
``NumShorts``, i.e. the number of deltas in ItemVariationData's delta sets
that use a 16-bit representation (b2825ff).

3.8.0 (released 2017-03-05)
---------------------------

- New pens: MomentsPen, StatisticsPen, RecordingPen, and TeePen.
- [misc] Added new ``fontTools.misc.symfont`` module, for symbolic font
statistical analysis; requires ``sympy`` (http://www.sympy.org/en/index.html)
- [varLib] Added experimental ``fontTools.varLib.interpolatable`` module for
finding wrong contour order between different masters
- [varLib] designspace.load() now returns a dictionary, instead of a tuple,
and supports <axes> element (#864); the 'masters' item was renamed 'sources',
like the <sources> element in the designspace document
- [ttLib] Fixed issue with recalculating ``head`` modified timestamp when
saving CFF fonts
- [ttLib] In TupleVariation, round deltas before compiling (#861, fixed #592)
- [feaLib] Ignore duplicate glyphs in classes used as MarkFilteringSet and
MarkAttachmentType (#863)
- [merge] Changed the ``gasp`` table merge logic so that only the one from
the first font is retained, similar to other hinting tables (#862)
- [Tests] Added tests for the ``varLib`` package, as well as test fonts
from the "Annotated OpenType Specification" (AOTS) to exercise ``ttLib``'s
table readers/writers (<https://github.com/adobe-type-tools/aots>)

3.7.2 (released 2017-02-17)
---------------------------

- [subset] Keep advance widths when stripping ".notdef" glyph outline in
CID-keyed CFF fonts (#845)
- [feaLib] Zero values now produce the same results as makeotf (#633, #848)
- [feaLib] More compact encoding for “Contextual positioning with in-line
single positioning rules” (#514)

3.7.1 (released 2017-02-15)
---------------------------

- [subset] Fixed issue with ``--no-hinting`` option whereby advance widths in
Type 2 charstrings were also being stripped (#709, #343)
- [feaLib] include statements now resolve relative paths like makeotf (#838)
- [feaLib] table ``name`` now handles Unicode codepoints beyond the Basic
Multilingual Plane, also supports old-style MacOS platform encodings (#842)
- [feaLib] correctly escape string literals when emitting feature syntax (#780)

3.7.0 (released 2017-02-11)
---------------------------

- [ttx, mtiLib] Preserve ordering of glyph alternates in GSUB type 3 (#833).
- [feaLib] Glyph names can have dashes, as per new AFDKO syntax v1.20 (#559).
- [feaLib] feaLib.Parser now needs the font's glyph map for parsing.
- [varLib] Fix regression where GPOS values were stored as 0.
- [varLib] Allow merging of class-based kerning when ClassDefs are different

3.6.3 (released 2017-02-06)
---------------------------

- [varLib] Fix building variation of PairPosFormat2 (b5c34ce).
- Populate defaults even for otTables that have postRead (e45297b).
- Fix compiling of MultipleSubstFormat1 with zero 'out' glyphs (b887860).

3.6.2 (released 2017-01-30)
---------------------------

- [varLib.merger] Fixed "TypeError: reduce() of empty sequence with no
initial value" (3717dc6).

3.6.1 (released 2017-01-28)
---------------------------

- [py23] Fixed unhandled exception occurring at interpreter shutdown in
the "last resort" logging handler (972b3e6).
- [agl] Ensure all glyph names are of native 'str' type; avoid mixing
'str' and 'unicode' in TTFont.glyphOrder (d8c4058).
- Fixed inconsistent title levels in README.rst that caused PyPI to
incorrectly render the reStructuredText page.

3.6.0 (released 2017-01-26)
---------------------------

- [varLib] Refactored and improved the variation-font-building process.
- Assembly code in the fpgm, prep, and glyf tables is now indented in
XML output for improved readability. The ``instruction`` element is
written as a simple tag if empty (#819).
- [ttx] Fixed 'I/O operation on closed file' error when dumping
multiple TTXs to standard output with the '-o -' option.
- The unit test modules (``*_test.py``) have been moved outside of the
fontTools package to the Tests folder, thus they are no longer
installed (#811).

3.5.0 (released 2017-01-14)
---------------------------

- Font tables read from XML can now be written back to XML with no
loss.
- GSUB/GPOS LookupType is written out in XML as an element, not
comment. (#792)
- When parsing cmap table, do not store items mapped to glyph id 0.
(#790)
- [otlLib] Make ClassDef sorting deterministic. Fixes #766 (7d1ddb2)
- [mtiLib] Added unit tests (#787)
- [cvar] Implemented cvar table
- [gvar] Renamed GlyphVariation to TupleVariation to match OpenType
terminology.
- [otTables] Handle gracefully empty VarData.Item array when compiling
XML. (#797)
- [varLib] Re-enabled generation of ``HVAR`` table for fonts with
TrueType outlines; removed ``--build-HVAR`` command-line option.
- [feaLib] The parser can now be extended to support non-standard
statements in FEA code by using a customized Abstract Syntax Tree.
See, for example, ``feaLib.builder_test.test_extensions`` and
baseClass.feax (#794, fixes #773).
- [feaLib] Added ``feaLib`` command to the 'fonttools' command-line
tool; applies a feature file to a font. ``fonttools feaLib -h`` for
help.
- [pens] The ``T2CharStringPen`` now takes an optional
``roundTolerance`` argument to control the rounding of coordinates
(#804, fixes #769).
- [ci] Measure test coverage on all supported python versions and OSes,
combine coverage data and upload to
https://codecov.io/gh/fonttools/fonttools (#786)
- [ci] Configured Travis and Appveyor for running tests on Python 3.6
(#785, 55c03bc)
- The manual pages installation directory can be customized through
``FONTTOOLS_MANPATH`` environment variable (#799, fixes #84).
- [Snippets] Added otf2ttf.py, for converting fonts from CFF to
TrueType using the googlei18n/cu2qu module (#802)

3.4.0 (released 2016-12-21)
---------------------------

- [feaLib] Added support for generating FEA text from abstract syntax
tree (AST) objects (#776). Thanks @mhosken
- Added ``agl.toUnicode`` function to convert AGL-compliant glyph names
to Unicode strings (#774)
- Implemented MVAR table (b4d5381)

3.3.1 (released 2016-12-15)
---------------------------

- [setup] We no longer use versioneer.py to compute fonttools version
from git metadata, as this has caused issues for some users (#767).
Now we bump the version strings manually with a custom ``release``
command of setup.py script.

3.3.0 (released 2016-12-06)
---------------------------

- [ttLib] Implemented STAT table from OpenType 1.8 (#758)
- [cffLib] Fixed decompilation of CFF fonts containing non-standard
key/value pairs in FontDict (issue #740; PR #744)
- [py23] minor: in ``round3`` function, allow the second argument to be
``None`` (#757)
- The standalone ``sstruct`` and ``xmlWriter`` modules, deprecated
since vesion 3.2.0, have been removed. They can be imported from the
``fontTools.misc`` package.

3.2.3 (released 2016-12-02)
---------------------------

- [py23] optimized performance of round3 function; added backport for
py35 math.isclose() (9d8dacb)
- [subset] fixed issue with 'narrow' (UCS-2) Python 2 builds and
``--text``/``--text-file`` options containing non-BMP chararcters
(16d0e5e)
- [varLib] fixed issuewhen normalizing location values (8fa2ee1, #749)
- [inspect] Made it compatible with both python2 and python3 (167ee60,
#748). Thanks @pnemade

3.2.2 (released 2016-11-24)
---------------------------

- [varLib] Do not emit null axes in fvar (1bebcec). Thanks @robmck-ms
- [varLib] Handle fonts without GPOS (7915a45)
- [merge] Ignore LangSys if None (a11bc56)
- [subset] Fix subsetting MathVariants (78d3cbe)
- [OS/2] Fix "Private Use (plane 15)" range (08a0d55). Thanks @mashabow

3.2.1 (released 2016-11-03)
---------------------------

- [OS/2] fix checking ``fsSelection`` bits matching ``head.macStyle``
bits
- [varLib] added ``--build-HVAR`` option to generate ``HVAR`` table for
fonts with TrueType outlines. For ``CFF2``, it is enabled by default.

3.2.0 (released 2016-11-02)
---------------------------

- [varLib] Improve support for OpenType 1.8 Variable Fonts:
- Implement GDEF's VariationStore
- Implement HVAR/VVAR tables
- Partial support for loading MutatorMath .designspace files with
varLib.designspace module
- Add varLib.models with Variation fonts interpolation models
- Implement GSUB/GPOS FeatureVariations
- Initial support for interpolating and merging OpenType Layout tables
(see ``varLib.interpolate_layout`` and ``varLib.merger`` modules)
- [API change] Change version to be an integer instead of a float in
XML output for GSUB, GPOS, GDEF, MATH, BASE, JSTF, HVAR, VVAR, feat,
hhea and vhea tables. Scripts that set the Version for those to 1.0
or other float values also need fixing. A warning is emitted when
code or XML needs fix.
- several bug fixes to the cffLib module, contributed by Adobe's
@readroberts
- The XML output for CFF table now has a 'major' and 'minor' elements
for specifying whether it's version 1.0 or 2.0 (support for CFF2 is
coming soon)
- [setup.py] remove undocumented/deprecated ``extra_path`` Distutils
argument. This means that we no longer create a "FontTools" subfolder
in site-packages containing the actual fontTools package, as well as
the standalone xmlWriter and sstruct modules. The latter modules are
also deprecated, and scheduled for removal in upcoming releases.
Please change your import statements to point to from fontTools.misc
import xmlWriter and from fontTools.misc import sstruct.
- [scripts] Add a 'fonttools' command-line tool that simply runs
``fontTools.*`` sub-modules: e.g. ``fonttools ttx``,
``fonttools subset``, etc.
- [hmtx/vmts] Read advance width/heights as unsigned short (uint16);
automatically round float values to integers.
- [ttLib/xmlWriter] add 'newlinestr=None' keyword argument to
``TTFont.saveXML`` for overriding os-specific line endings (passed on
to ``XMLWriter`` instances).
- [versioning] Use versioneer instead of ``setuptools_scm`` to
dynamically load version info from a git checkout at import time.
- [feaLib] Support backslash-prefixed glyph names.

3.1.2 (released 2016-09-27)
---------------------------

- restore Makefile as an alternative way to build/check/install
- README.md: update instructions for installing package from source,
and for running test suite
- NEWS: Change log was out of sync with tagged release

3.1.1 (released 2016-09-27)
---------------------------

- Fix ``ttLibVersion`` attribute in TTX files still showing '3.0'
instead of '3.1'.
- Use ``setuptools_scm`` to manage package versions.

3.1.0 (released 2016-09-26)
---------------------------

- [feaLib] New library to parse and compile Adobe FDK OpenType Feature
files.
- [mtiLib] New library to parse and compile Monotype 'FontDame'
OpenType Layout Tables files.
- [voltLib] New library to parse Microsoft VOLT project files.
- [otlLib] New library to work with OpenType Layout tables.
- [varLib] New library to work with OpenType Font Variations.
- [pens] Add ttGlyphPen to draw to TrueType glyphs, and t2CharStringPen
to draw to Type 2 Charstrings (CFF); add areaPen and perimeterPen.
- [ttLib.tables] Implement 'meta' and 'trak' tables.
- [ttx] Add --flavor option for compiling to 'woff' or 'woff2'; add
``--with-zopfli`` option to use Zopfli to compress WOFF 1.0 fonts.
- [subset] Support subsetting 'COLR'/'CPAL' and 'CBDT'/'CBLC' color
fonts tables, and 'gvar' table for variation fonts.
- [Snippets] Add ``symfont.py``, for symbolic font statistics analysis;
interpolatable.py, a preliminary script for detecting interpolation
errors; ``{merge,dump}_woff_metadata.py``.
- [classifyTools] Helpers to classify things into classes.
- [CI] Run tests on Windows, Linux and macOS using Appveyor and Travis
CI; check unit test coverage with Coverage.py/Coveralls; automatic
deployment to PyPI on tags.
- [loggingTools] Use Python built-in logging module to print messages.
- [py23] Make round() behave like Python 3 built-in round(); define
round2() and round3().

3.0 (released 2015-09-01)
-------------------------

- Add Snippet scripts for cmap subtable format conversion, printing
GSUB/GPOS features, building a GX font from two masters
- TTX WOFF2 support and a ``-f`` option to overwrite output file(s)
- Support GX tables: ``avar``, ``gvar``, ``fvar``, ``meta``
- Support ``feat`` and gzip-compressed SVG tables
- Upgrade Mac East Asian encodings to native implementation if
available
- Add Roman Croatian and Romanian encodings, codecs for mac-extended
East Asian encodings
- Implement optimal GLYF glyph outline packing; disabled by default

2.5 (released 2014-09-24)
-------------------------

- Add a Qt pen
- Add VDMX table converter
- Load all OpenType sub-structures lazily
- Add support for cmap format 13.
- Add pyftmerge tool
- Update to Unicode 6.3.0d3
- Add pyftinspect tool
- Add support for Google CBLC/CBDT color bitmaps, standard EBLC/EBDT
embedded bitmaps, and ``SVG`` table (thanks to Read Roberts at Adobe)
- Add support for loading, saving and ttx'ing WOFF file format
- Add support for Microsoft COLR/CPAL layered color glyphs
- Support PyPy
- Support Jython, by replacing numpy with array/lists modules and
removed it, pure-Python StringIO, not cStringIO
- Add pyftsubset and Subsetter object, supporting CFF and TTF
- Add to ttx args for -q for quiet mode, -z to choose a bitmap dump
format

2.4 (released 2013-06-22)
-------------------------

- Option to write to arbitrary files
- Better dump format for DSIG
- Better detection of OTF XML
- Fix issue with Apple's kern table format
- Fix mangling of TT glyph programs
- Fix issues related to mona.ttf
- Fix Windows Installer instructions
- Fix some modern MacOS issues
- Fix minor issues and typos

2.3 (released 2009-11-08)
-------------------------

- TrueType Collection (TTC) support
- Python 2.6 support
- Update Unicode data to 5.2.0
- Couple of bug fixes

2.2 (released 2008-05-18)
-------------------------

- ClearType support
- cmap format 1 support
- PFA font support
- Switched from Numeric to numpy
- Update Unicode data to 5.1.0
- Update AGLFN data to 1.6
- Many bug fixes

2.1 (released 2008-01-28)
-------------------------

- Many years worth of fixes and features

2.0b2 (released 2002-??-??)
---------------------------

- Be "forgiving" when interpreting the maxp table version field:
interpret any value as 1.0 if it's not 0.5. Fixes dumping of these
GPL fonts: http://www.freebsd.org/cgi/pds.cgi?ports/chinese/wangttf
- Fixed ttx -l: it turned out this part of the code didn't work with
Python 2.2.1 and earlier. My bad to do most of my testing with a
different version than I shipped TTX with :-(
- Fixed bug in ClassDef format 1 subtable (Andreas Seidel bumped into
this one).

2.0b1 (released 2002-09-10)
---------------------------

- Fixed embarrassing bug: the master checksum in the head table is now
calculated correctly even on little-endian platforms (such as Intel).
- Made the cmap format 4 compiler smarter: the binary data it creates
is now more or less as compact as possible. TTX now makes more
compact data than in any shipping font I've tested it with.
- Dump glyph names as a separate "GlyphOrder" pseudo table as opposed
to as part of the glyf table (obviously needed for CFF-OTF's).
- Added proper support for the CFF table.
- Don't barf on empty tables (questionable, but "there are font out
there...")
- When writing TT glyf data, align glyphs on 4-byte boundaries. This
seems to be the current recommendation by MS. Also: don't barf on
fonts which are already 4-byte aligned.
- Windows installer contributed bu Adam Twardoch! Yay!
- Changed the command line interface again, now by creating one new
tool replacing the old ones: ttx It dumps and compiles, depending on
input file types. The options have changed somewhat.
- The -d option is back (output dir)
- ttcompile's -i options is now called -m (as in "merge"), to avoid
clash with dump's -i.
- The -s option ("split tables") no longer creates a directory, but
instead outputs a small .ttx file containing references to the
individual table files. This is not a true link, it's a simple file
name, and the referenced file should be in the same directory so
ttcompile can find them.
- compile no longer accepts a directory as input argument. Instead it
can parse the new "mini-ttx" format as output by "ttx -s".
- all arguments are input files
- Renamed the command line programs and moved them to the Tools
subdirectory. They are now installed by the setup.py install script.
- Added OpenType support. BASE, GDEF, GPOS, GSUB and JSTF are (almost)
fully supported. The XML output is not yet final, as I'm still
considering to output certain subtables in a more human-friendly
manner.
- Fixed 'kern' table to correctly accept subtables it doesn't know
about, as well as interpreting Apple's definition of the 'kern' table
headers correctly.
- Fixed bug where glyphnames were not calculated from 'cmap' if it was
(one of the) first tables to be decompiled. More specifically: it
cmap was the first to ask for a glyphID -> glyphName mapping.
- Switched XML parsers: use expat instead of xmlproc. Should be faster.
- Removed my UnicodeString object: I now require Python 2.0 or up,
which has unicode support built in.
- Removed assert in glyf table: redundant data at the end of the table
is now ignored instead of raising an error. Should become a warning.
- Fixed bug in hmtx/vmtx code that only occured if all advances were
equal.
- Fixed subtle bug in TT instruction disassembler.
- Couple of fixes to the 'post' table.
- Updated OS/2 table to latest spec.

1.0b1 (released 2001-08-10)
---------------------------

- Reorganized the command line interface for ttDump.py and
ttCompile.py, they now behave more like "normal" command line tool,
in that they accept multiple input files for batch processing.
- ttDump.py and ttCompile.py don't silently override files anymore, but
ask before doing so. Can be overridden by -f.
- Added -d option to both ttDump.py and ttCompile.py.
- Installation is now done with distutils. (Needs work for environments
without compilers.)
- Updated installation instructions.
- Added some workarounds so as to handle certain buggy fonts more
gracefully.
- Updated Unicode table to Unicode 3.0 (Thanks Antoine!)
- Included a Python script by Adam Twardoch that adds some useful stuff
to the Windows registry.
- Moved the project to SourceForge.

1.0a6 (released 2000-03-15)
---------------------------

- Big reorganization: made ttLib a subpackage of the new fontTools
package, changed several module names. Called the entire suite
"FontTools"
- Added several submodules to fontTools, some new, some older.
- Added experimental CFF/GPOS/GSUB support to ttLib, read-only (but XML
dumping of GPOS/GSUB is for now disabled)
- Fixed hdmx endian bug
- Added -b option to ttCompile.py, it disables recalculation of
bounding boxes, as requested by Werner Lemberg.
- Renamed tt2xml.pt to ttDump.py and xml2tt.py to ttCompile.py
- Use ".ttx" as file extension instead of ".xml".
- TTX is now the name of the XML-based *format* for TT fonts, and not
just an application.

1.0a5
-----

Never released

- More tables supported: hdmx, vhea, vmtx

1.0a3 & 1.0a4
-------------

Never released

- fixed most portability issues
- retracted the "Euro_or_currency" change from 1.0a2: it was
nonsense!

1.0a2 (released 1999-05-02)
---------------------------

- binary release for MacOS
- genenates full FOND resources: including width table, PS font name
info and kern table if applicable.
- added cmap format 4 support. Extra: dumps Unicode char names as XML
comments!
- added cmap format 6 support
- now accepts true type files starting with "true" (instead of just
0x00010000 and "OTTO")
- 'glyf' table support is now complete: I added support for composite
scale, xy-scale and two-by-two for the 'glyf' table. For now,
component offset scale behaviour defaults to Apple-style. This only
affects the (re)calculation of the glyph bounding box.
- changed "Euro" to "Euro_or_currency" in the Standard Apple Glyph
order list, since we cannot tell from the 'post' table which is
meant. I should probably doublecheck with a Unicode encoding if
available. (This does not affect the output!)

Fixed bugs: - 'hhea' table is now recalculated correctly - fixed wrong
assumption about sfnt resource names

1.0a1 (released 1999-04-27)
---------------------------

- initial binary release for MacOS


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