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small fix to fontTools Documentation heading #3490

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2 changes: 1 addition & 1 deletion Doc/source/index.rst
Expand Up @@ -5,7 +5,7 @@
:align: center


---fontTools Documentation---
fontTools Documentation
=======
About
-----
Expand Down
128 changes: 49 additions & 79 deletions Doc/source/optional.rst
@@ -1,142 +1,112 @@
:orphan:

Optional Dependencies
=====================

The fonttools PyPI distribution also supports so-called "extras", i.e. a
set of keywords that describe a group of additional dependencies, which can be
used when installing via pip, or when specifying a requirement.
For example:
The FontTools PyPI distribution supports "extras", which are groups of additional dependencies that can be installed alongside FontTools via pip to enable specific features. For example:

.. code:: sh

pip install fonttools[ufo,lxml,woff,unicode]

This command will install fonttools, as well as the optional dependencies that
are required to unlock the extra features named "ufo", etc.

.. note::

Optional dependencies are detailed by module in the list below with the ``Extra`` setting that automates ``pip`` dependency installation when this is supported.
This command installs FontTools along with the optional dependencies required for features like "ufo", "lxml", "woff", and "unicode".

.. note:: sh

Optional dependencies are listed by module below, along with the `Extra` setting that automates `pip` dependency installation when supported.

:py:mod:`fontTools.misc.etree`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
--------------------

The module exports a ElementTree-like API for reading/writing XML files, and allows to use as the backend either the built-in ``xml.etree`` module or `lxml <https://lxml.de>`__. The latter is preferred whenever present, as it is generally faster and more secure.
This module provides an ElementTree-like API for reading and writing XML files. It supports two backend options:

*Extra:* ``lxml``
- Built-in `xml.etree` module
- `lxml` preferred for improved speed and security.

*Extra:* `lxml`

:py:mod:`fontTools.ufoLib`
^^^^^^^^^^^^^^^^^^^^^^^^^^

Package for reading and writing UFO source files; it requires:
----------------

* `fs <https://pypi.org/pypi/fs>`__: (aka ``pyfilesystem2``) filesystem abstraction layer.
Package for reading and writing UFO source files. Dependencies include:

* `enum34 <https://pypi.org/pypi/enum34>`__: backport for the built-in ``enum`` module (only required on Python < 3.4).

*Extra:* ``ufo``
- `fs <https://pypi.org/pypi/fs>`__: (aka ``pyfilesystem2``) filesystem abstraction layer
- `enum34 <https://pypi.org/pypi/enum34>`__ backport for the built-in ``enum`` module (module for Python versions < 3.4)

*Extra:* `ufo`

:py:mod:`fontTools.ttLib.woff2`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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.
Module for compressing and decompressing WOFF 2.0 web fonts. Requires:

*Extra:* ``woff``
- `brotli <https://pypi.python.org/pypi/Brotli>`__: Python bindings for the Brotli compression library.

*Extra:* `woff`

:py:mod:`fontTools.unicode`
^^^^^^^^^^^^^^^^^^^^^^^^^^^
-----------------

To display the Unicode character names when dumping the ``cmap`` table
with ``ttx`` we use the ``unicodedata`` module in the Standard Library.
Displays Unicode character names when working with the `cmap` table dumps,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
3.x updated to the latest Unicode version 14.0. Note this is not necessary if you use Python 3.11
as the latter already comes with an up-to-date ``unicodedata``.
To use the latest Unicode version, install:

*Extra:* ``unicode``
- `unicodedata2 <https://pypi.python.org/pypi/unicodedata2>`__: backport of `unicodedata` for Python 3.x, updated to unicode 14.0. Not necessary with Python 3.11.

*Extra:* `unicode`

:py:mod:`fontTools.varLib.interpolatable`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-------------------------------

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:
Module for resolving contour or component order between different masters. Requires following packages to solve 'minimum weight perfect matching problem in bipartite graphs':

* `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.

*Extra:* ``interpolatable``
- `scipy <https://pypi.python.org/pypi/scipy>`__: Scientific Library for Python, uses `NumPy <https://pypi.python.org/pypi/numpy>`__ arrays for performance;
- `munkres <https://pypi.python.org/pypi/munkres>`__: implementation of the Hungarian or Kuhn-Munkres algorithm.

*Extra:* `interpolatable`

:py:mod:`fontTools.varLib.plot`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Module for visualizing DesignSpaceDocument and resulting VariationModel.
----------------------

* `matplotlib <https://pypi.org/pypi/matplotlib>`__: 2D plotting library.
Module for visualizing DesignSpaceDocument and resulting VariationModel. Requires:

*Extra:* ``plot``
- `matplotlib <https://pypi.org/pypi/matplotlib>`__: 2D plotting library.

*Extra:* `plot`

:py:mod:`fontTools.misc.symfont`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Advanced module for symbolic font statistics analysis; it requires:
----------------------

* `sympy <https://pypi.python.org/pypi/sympy>`__: the Python library for symbolic mathematics.
Advanced module for symbolic font statistics analysis. Requires:

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

*Extra:* `symfont`

:py:mod:`fontTools.t1Lib`
^^^^^^^^^^^^^^^^^^^^^^^^^
---------------

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:
Retrieves information about Macintosh PostScript Type 1 fonts on Python 3. Requires:

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

*Extra:* ``type1``
- `xattr <https://pypi.python.org/pypi/xattr>`__: Python wrapper for extended filesystem attributes, macOS only.

*Extra:* `type1`

:py:mod:`fontTools.pens.cocoaPen`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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).
Pen for drawing glyphs with Cocoa `NSBezierPath`. Requires:

- `PyObjC <https://pypi.python.org/pypi/pyobjc>`__: Python - Objective-C bridge, macOS only.

:py:mod:`fontTools.pens.qtPen`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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.
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.

:py:mod:`fontTools.pens.reportLabPen`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
---------------------------

Pen to drawing glyphs as PNG images, requires:
Pen for drawing glyphs as PNG images. Requires:

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