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glyphsLib
=========
This Python library provides a bridge from Glyphs source files (.glyphs) to
UFOs and Designspace files via `defcon <https://github.com/typesupply/defcon/>`__ and `designspaceLib <https://github.com/fonttools/fonttools>`__.
The main methods for conversion are found in ``__init__.py``.
Intermediate data can be accessed without actually writing UFOs, if
needed.
Write and return UFOs
^^^^^^^^^^^^^^^^^^^^^
The following code will write UFOs and a Designspace file to disk.
.. code:: python
import glyphsLib
master_dir = "master_ufos"
ufos, designspace_path = glyphsLib.build_masters("MyFont.glyphs", master_dir)
If you want to interpolate instances, please use fontmake instead. It uses this library under the hood when dealing with Glyphs files.
Load UFO objects without writing
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. code:: python
import glyphsLib
ufos = glyphsLib.load_to_ufos("MyFont.glyphs")
Read and write Glyphs data as Python objects
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. code:: python
from glyphsLib import GSFont
font = GSFont(glyphs_file)
font.save(glyphs_file)
The ``glyphsLib.classes`` module aims to provide an interface similar to
Glyphs.app's `Python Scripting API <https://docu.glyphsapp.com>`__.
Note that currently not all the classes and methods may be fully
implemented. We try to keep up to date, but if you find something that
is missing or does not work as expected, please open a issue.
.. TODO Briefly state how much of the Glyphs.app API is currently covered,
and what is not supported yet.
Go back and forth between UFOs and Glyphs
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
1. You can use the ``ufo2glyphs`` and ``glyphs2ufo`` command line scripts to
round-trip your source files. By default, the scripts try to preserve as
much metadata as possible.
.. code::
# Generate master UFOs and Designspace file
glyphs2ufo Example.glyphs
# Go back
ufo2glyphs Example.designspace
# You can also combine single UFOs into a Glyphs source file.
ufo2glyphs Example-Regular.ufo Example-Bold.ufo
2. Without a designspace file, using for example the
`Inria fonts by Black[Foundry] <https://github.com/BlackFoundry/InriaFonts/tree/master/masters/INRIA-SANS>`__:
.. code:: python
import glob
from defcon import Font
from glyphsLib import to_glyphs
ufos = [Font(path) for path in glob.glob("*Italic.ufo")]
# Sort the UFOs because glyphsLib will create masters in the same order
ufos = sorted(ufos, key=lambda ufo: ufo.info.openTypeOS2WeightClass)
font = to_glyphs(ufos)
font.save("InriaSansItalic.glyphs")
`Here is the resulting glyphs file <https://gist.githubusercontent.com/belluzj/cc3d43bf9b1cf22fde7fd4d2b97fdac4/raw/3222a2bfcf6554aa56a21b80f8fba82f1c5d7444/InriaSansItalic.glyphs>`__
3. With a designspace, using
`Spectral from Production Type <https://github.com/productiontype/Spectral/tree/master/sources>`__:
.. code:: python
import glob
from fontTools.designspaceLib import DesignSpaceDocument
from glyphsLib import to_glyphs
doc = DesignSpaceDocument()
doc.read("spectral-build-roman.designspace")
font = to_glyphs(doc)
font.save("SpectralRoman.glyphs")
`Here is the resulting glyphs file <https://gist.githubusercontent.com/belluzj/cc3d43bf9b1cf22fde7fd4d2b97fdac4/raw/3222a2bfcf6554aa56a21b80f8fba82f1c5d7444/SpectralRoman.glyphs>`__
4. In both programmatic cases, if you intend to go back to UFOs after modifying
the file with Glyphs, you should use the ``minimize_ufo_diffs`` parameter to
minimize the amount of diffs that will show up in git after the back and
forth. To do so, the glyphsLib will add some bookkeeping values in various
``userData`` fields. For example, it will try to remember which GSClass came
from groups.plist or from the feature file.
The same option exists for people who want to do Glyphs->UFOs->Glyphs:
``minimize_glyphs_diffs``, which will add some bookkeeping data in UFO ``lib``.
For example, it will keep the same UUIDs for Glyphs layers, and so will need
to store those layer UUIDs in the UFOs.
.. code:: python
import glob
import os
from fontTools.designspaceLib import DesignSpaceDocument
from glyphsLib import to_glyphs, to_designspace, GSFont
doc = DesignSpaceDocument()
doc.read("spectral-build-roman.designspace")
font = to_glyphs(doc, minimize_ufo_diffs=True)
doc2 = to_designspace(font, propagate_anchors=False)
# UFOs are in memory only, attached to the doc via `sources`
# Writing doc2 over the original doc should generate very few git diffs (ideally none)
doc2.write(doc.path)
for source in doc2.sources:
path = os.path.join(os.path.dirname(doc.path), source.filename)
# You will want to use ufoNormalizer after
source.font.save(path)
font = GSFont("SpectralRoman.glyphs")
doc = to_designspace(font, minimize_glyphs_diffs=True, propagate_anchors=False)
font2 = to_glyphs(doc)
# Writing font2 over font should generate very few git diffs (ideally none):
font2.save(font.filepath)
In practice there are always a few diffs on things that don't really make a
difference, like optional things being added/removed or whitespace changes or
things getting reordered...
Make a release
^^^^^^^^^^^^^^
Use ``git tag -a`` to make a new annotated tag, or ``git tag -s`` for a GPG-signed
annotated tag, if you prefer.
Name the new tag with with a leading ‘v’ followed by three ``MAJOR.MINOR.PATCH``
digits, like in semantic versioning. Look at the existing tags for examples.
In the tag message write some short release notes describing the changes since the
previous tag.
Finally, push the tag to the remote repository (e.g. assuming your upstream is
called ``origin``):
.. code::
$ git push origin v0.4.3
This will trigger the CI to build the distribution packages and upload them to
the Python Package Index automatically, if all the tests pass successfully.
.. |CI Build Status| image:: https://github.com/googlefonts/glyphsLib/workflows/Test%20+%20Deploy/badge.svg
:target: https://github.com/googlefonts/glyphsLib/actions
.. |PyPI Version| image:: https://img.shields.io/pypi/v/glyphsLib.svg
:target: https://pypi.org/project/glyphsLib/
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:target: https://codecov.io/gh/googlefonts/glyphsLib
.. |Gitter Chat| image:: https://badges.gitter.im/fonttools-dev/glyphsLib.svg
:alt: Join the chat at https://gitter.im/fonttools-dev/glyphsLib
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"description": "|CI Build Status| |PyPI Version| |Codecov| |Gitter Chat|\n\nglyphsLib\n=========\n\nThis Python library provides a bridge from Glyphs source files (.glyphs) to\nUFOs and Designspace files via `defcon <https://github.com/typesupply/defcon/>`__ and `designspaceLib <https://github.com/fonttools/fonttools>`__.\n\nThe main methods for conversion are found in ``__init__.py``.\nIntermediate data can be accessed without actually writing UFOs, if\nneeded.\n\nWrite and return UFOs\n^^^^^^^^^^^^^^^^^^^^^\n\nThe following code will write UFOs and a Designspace file to disk.\n\n.. code:: python\n\n import glyphsLib\n\n master_dir = \"master_ufos\"\n ufos, designspace_path = glyphsLib.build_masters(\"MyFont.glyphs\", master_dir)\n\nIf you want to interpolate instances, please use fontmake instead. It uses this library under the hood when dealing with Glyphs files.\n\nLoad UFO objects without writing\n^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n.. code:: python\n\n import glyphsLib\n\n ufos = glyphsLib.load_to_ufos(\"MyFont.glyphs\")\n\nRead and write Glyphs data as Python objects\n^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n.. code:: python\n\n from glyphsLib import GSFont\n\n font = GSFont(glyphs_file)\n font.save(glyphs_file)\n\nThe ``glyphsLib.classes`` module aims to provide an interface similar to\nGlyphs.app's `Python Scripting API <https://docu.glyphsapp.com>`__.\n\nNote that currently not all the classes and methods may be fully\nimplemented. We try to keep up to date, but if you find something that\nis missing or does not work as expected, please open a issue.\n\n.. TODO Briefly state how much of the Glyphs.app API is currently covered,\n and what is not supported yet.\n\nGo back and forth between UFOs and Glyphs\n^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n1. You can use the ``ufo2glyphs`` and ``glyphs2ufo`` command line scripts to\n round-trip your source files. By default, the scripts try to preserve as\n much metadata as possible.\n\n .. code::\n\n # Generate master UFOs and Designspace file\n glyphs2ufo Example.glyphs\n\n # Go back\n ufo2glyphs Example.designspace\n\n # You can also combine single UFOs into a Glyphs source file.\n ufo2glyphs Example-Regular.ufo Example-Bold.ufo\n\n2. Without a designspace file, using for example the\n `Inria fonts by Black[Foundry] <https://github.com/BlackFoundry/InriaFonts/tree/master/masters/INRIA-SANS>`__:\n\n .. code:: python\n\n import glob\n from defcon import Font\n from glyphsLib import to_glyphs\n\n ufos = [Font(path) for path in glob.glob(\"*Italic.ufo\")]\n # Sort the UFOs because glyphsLib will create masters in the same order\n ufos = sorted(ufos, key=lambda ufo: ufo.info.openTypeOS2WeightClass)\n font = to_glyphs(ufos)\n font.save(\"InriaSansItalic.glyphs\")\n\n `Here is the resulting glyphs file <https://gist.githubusercontent.com/belluzj/cc3d43bf9b1cf22fde7fd4d2b97fdac4/raw/3222a2bfcf6554aa56a21b80f8fba82f1c5d7444/InriaSansItalic.glyphs>`__\n\n3. With a designspace, using\n `Spectral from Production Type <https://github.com/productiontype/Spectral/tree/master/sources>`__:\n\n .. code:: python\n\n import glob\n from fontTools.designspaceLib import DesignSpaceDocument\n from glyphsLib import to_glyphs\n\n doc = DesignSpaceDocument()\n doc.read(\"spectral-build-roman.designspace\")\n font = to_glyphs(doc)\n font.save(\"SpectralRoman.glyphs\")\n\n `Here is the resulting glyphs file <https://gist.githubusercontent.com/belluzj/cc3d43bf9b1cf22fde7fd4d2b97fdac4/raw/3222a2bfcf6554aa56a21b80f8fba82f1c5d7444/SpectralRoman.glyphs>`__\n\n4. In both programmatic cases, if you intend to go back to UFOs after modifying\n the file with Glyphs, you should use the ``minimize_ufo_diffs`` parameter to\n minimize the amount of diffs that will show up in git after the back and\n forth. To do so, the glyphsLib will add some bookkeeping values in various\n ``userData`` fields. For example, it will try to remember which GSClass came\n from groups.plist or from the feature file.\n\nThe same option exists for people who want to do Glyphs->UFOs->Glyphs:\n``minimize_glyphs_diffs``, which will add some bookkeeping data in UFO ``lib``.\nFor example, it will keep the same UUIDs for Glyphs layers, and so will need\nto store those layer UUIDs in the UFOs.\n\n.. code:: python\n\n import glob\n import os\n from fontTools.designspaceLib import DesignSpaceDocument\n from glyphsLib import to_glyphs, to_designspace, GSFont\n\n doc = DesignSpaceDocument()\n doc.read(\"spectral-build-roman.designspace\")\n font = to_glyphs(doc, minimize_ufo_diffs=True)\n doc2 = to_designspace(font, propagate_anchors=False)\n # UFOs are in memory only, attached to the doc via `sources`\n # Writing doc2 over the original doc should generate very few git diffs (ideally none)\n doc2.write(doc.path)\n for source in doc2.sources:\n path = os.path.join(os.path.dirname(doc.path), source.filename)\n # You will want to use ufoNormalizer after\n source.font.save(path)\n\n font = GSFont(\"SpectralRoman.glyphs\")\n doc = to_designspace(font, minimize_glyphs_diffs=True, propagate_anchors=False)\n font2 = to_glyphs(doc)\n # Writing font2 over font should generate very few git diffs (ideally none):\n font2.save(font.filepath)\n\nIn practice there are always a few diffs on things that don't really make a\ndifference, like optional things being added/removed or whitespace changes or\nthings getting reordered...\n\nMake a release\n^^^^^^^^^^^^^^\n\nUse ``git tag -a`` to make a new annotated tag, or ``git tag -s`` for a GPG-signed\nannotated tag, if you prefer.\n\nName the new tag with with a leading \u2018v\u2019 followed by three ``MAJOR.MINOR.PATCH``\ndigits, like in semantic versioning. 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