"""

A module for finding, managing, and using fonts across platforms.

This module provides a single `FontManager` instance that can

be shared across backends and platforms. The `findfont`

function returns the best TrueType (TTF) font file in the local or

system font path that matches the specified `FontProperties`

instance. The `FontManager` also handles Adobe Font Metrics

(AFM) font files for use by the PostScript backend.

The design is based on the `W3C Cascading Style Sheet, Level 1 (CSS1)

font specification <http://www.w3.org/TR/1998/REC-CSS2-19980512/>`_.

Future versions may implement the Level 2 or 2.1 specifications.

"""

# KNOWN ISSUES

#

# - documentation

# - font variant is untested

# - font stretch is incomplete

# - font size is incomplete

# - default font algorithm needs improvement and testing

# - setWeights function needs improvement

# - 'light' is an invalid weight value, remove it.

from functools import lru_cache

import json

import logging

from numbers import Number

import os

from pathlib import Path

import re

import subprocess

import sys

try:

import threading

from threading import Timer

except ImportError:

import dummy_threading as threading

from dummy_threading import Timer

import matplotlib as mpl

from matplotlib import _api, afm, cbook, ft2font, rcParams

from matplotlib.fontconfig_pattern import (

parse_fontconfig_pattern, generate_fontconfig_pattern)

from matplotlib.rcsetup import _validators

_log = logging.getLogger(__name__)

font_scalings = {

'xx-small': 0.579,

'x-small': 0.694,

'small': 0.833,

'medium': 1.0,

'large': 1.200,

'x-large': 1.440,

'xx-large': 1.728,

'larger': 1.2,

'smaller': 0.833,

None: 1.0,

}

stretch_dict = {

'ultra-condensed': 100,

'extra-condensed': 200,

'condensed': 300,

'semi-condensed': 400,

'normal': 500,

'semi-expanded': 600,

'semi-extended': 600,

'expanded': 700,

'extended': 700,

'extra-expanded': 800,

'extra-extended': 800,

'ultra-expanded': 900,

'ultra-extended': 900,

}

weight_dict = {

'ultralight': 100,

'light': 200,

'normal': 400,

'regular': 400,

'book': 400,

'medium': 500,

'roman': 500,

'semibold': 600,

'demibold': 600,

'demi': 600,

'bold': 700,

'heavy': 800,

'extra bold': 800,

'black': 900,

}

_weight_regexes = [

# From fontconfig's FcFreeTypeQueryFaceInternal; not the same as

# weight_dict!

("thin", 100),

("extralight", 200),

("ultralight", 200),

("demilight", 350),

("semilight", 350),

("light", 300), # Needs to come *after* demi/semilight!

("book", 380),

("regular", 400),

("normal", 400),

("medium", 500),

("demibold", 600),

("demi", 600),

("semibold", 600),

("extrabold", 800),

("superbold", 800),

("ultrabold", 800),

("bold", 700), # Needs to come *after* extra/super/ultrabold!

("ultrablack", 1000),

("superblack", 1000),

("extrablack", 1000),

(r"\bultra", 1000),

("black", 900), # Needs to come *after* ultra/super/extrablack!

("heavy", 900),

]

font_family_aliases = {

'serif',

'sans-serif',

'sans serif',

'cursive',

'fantasy',

'monospace',

'sans',

}

# OS Font paths

try:

_HOME = Path.home()

except Exception: # Exceptions thrown by home() are not specified...

_HOME = Path(os.devnull) # Just an arbitrary path with no children.

MSFolders = \

r'Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders'

MSFontDirectories = [

r'SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts',

r'SOFTWARE\Microsoft\Windows\CurrentVersion\Fonts']

MSUserFontDirectories = [

str(_HOME / 'AppData/Local/Microsoft/Windows/Fonts'),

str(_HOME / 'AppData/Roaming/Microsoft/Windows/Fonts'),

]

X11FontDirectories = [

# an old standard installation point

"/usr/X11R6/lib/X11/fonts/TTF/",

"/usr/X11/lib/X11/fonts",

# here is the new standard location for fonts

"/usr/share/fonts/",

# documented as a good place to install new fonts

"/usr/local/share/fonts/",

# common application, not really useful

"/usr/lib/openoffice/share/fonts/truetype/",

# user fonts

str((Path(os.environ.get('XDG_DATA_HOME') or _HOME / ".local/share"))

/ "fonts"),

str(_HOME / ".fonts"),

]

OSXFontDirectories = [

"/Library/Fonts/",

"/Network/Library/Fonts/",

"/System/Library/Fonts/",

# fonts installed via MacPorts

"/opt/local/share/fonts",

# user fonts

str(_HOME / "Library/Fonts"),

]

@lru_cache(64)

def _cached_realpath(path):

return os.path.realpath(path)

def get_fontext_synonyms(fontext):

"""

Return a list of file extensions extensions that are synonyms for

the given file extension *fileext*.

"""

return {

'afm': ['afm'],

'otf': ['otf', 'ttc', 'ttf'],

'ttc': ['otf', 'ttc', 'ttf'],

'ttf': ['otf', 'ttc', 'ttf'],

}[fontext]

def list_fonts(directory, extensions):

"""

Return a list of all fonts matching any of the extensions, found

recursively under the directory.

"""

extensions = ["." + ext for ext in extensions]

return [os.path.join(dirpath, filename)

# os.walk ignores access errors, unlike Path.glob.

for dirpath, _, filenames in os.walk(directory)

for filename in filenames

if Path(filename).suffix.lower() in extensions]

def win32FontDirectory():

r"""

Return the user-specified font directory for Win32. This is

looked up from the registry key ::

\\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders\Fonts

If the key is not found, ``%WINDIR%\Fonts`` will be returned.

"""

import winreg

try:

with winreg.OpenKey(winreg.HKEY_CURRENT_USER, MSFolders) as user:

return winreg.QueryValueEx(user, 'Fonts')[0]

except OSError:

return os.path.join(os.environ['WINDIR'], 'Fonts')

def _win32RegistryFonts(reg_domain, base_dir):

r"""

Search for fonts in the Windows registry.

Parameters

----------

reg_domain : int

The top level registry domain (e.g. HKEY_LOCAL_MACHINE).

base_dir : str

The path to the folder where the font files are usually located (e.g.

C:\Windows\Fonts). If only the filename of the font is stored in the

registry, the absolute path is built relative to this base directory.

Returns

-------

`set`

`pathlib.Path` objects with the absolute path to the font files found.

"""

import winreg

items = set()

for reg_path in MSFontDirectories:

try:

with winreg.OpenKey(reg_domain, reg_path) as local:

for j in range(winreg.QueryInfoKey(local)[1]):

# value may contain the filename of the font or its

# absolute path.

key, value, tp = winreg.EnumValue(local, j)

if not isinstance(value, str):

continue

# Work around for https://bugs.python.org/issue25778, which

# is fixed in Py>=3.6.1.

value = value.split("\0", 1)[0]

try:

# If value contains already an absolute path, then it

# is not changed further.

path = Path(base_dir, value).resolve()

except RuntimeError:

# Don't fail with invalid entries.

continue

items.add(path)

except (OSError, MemoryError):

continue

return items

def win32InstalledFonts(directory=None, fontext='ttf'):

"""

Search for fonts in the specified font directory, or use the

system directories if none given. Additionally, it is searched for user

fonts installed. A list of TrueType font filenames are returned by default,

or AFM fonts if *fontext* == 'afm'.

"""

import winreg

if directory is None:

directory = win32FontDirectory()

fontext = ['.' + ext for ext in get_fontext_synonyms(fontext)]

items = set()

# System fonts

items.update(_win32RegistryFonts(winreg.HKEY_LOCAL_MACHINE, directory))

# User fonts

for userdir in MSUserFontDirectories:

items.update(_win32RegistryFonts(winreg.HKEY_CURRENT_USER, userdir))

# Keep only paths with matching file extension.

return [str(path) for path in items if path.suffix.lower() in fontext]

@lru_cache()

def _call_fc_list():

"""Cache and list the font filenames known to `fc-list`."""

try:

if b'--format' not in subprocess.check_output(['fc-list', '--help']):

_log.warning( # fontconfig 2.7 implemented --format.

'Matplotlib needs fontconfig>=2.7 to query system fonts.')

return []

out = subprocess.check_output(['fc-list', '--format=%{file}\\n'])

except (OSError, subprocess.CalledProcessError):

return []

return [os.fsdecode(fname) for fname in out.split(b'\n')]

def get_fontconfig_fonts(fontext='ttf'):

"""List font filenames known to `fc-list` having the given extension."""

fontext = ['.' + ext for ext in get_fontext_synonyms(fontext)]

return [fname for fname in _call_fc_list()

if Path(fname).suffix.lower() in fontext]

def findSystemFonts(fontpaths=None, fontext='ttf'):

"""

Search for fonts in the specified font paths. If no paths are

given, will use a standard set of system paths, as well as the

list of fonts tracked by fontconfig if fontconfig is installed and

available. A list of TrueType fonts are returned by default with

AFM fonts as an option.

"""

fontfiles = set()

fontexts = get_fontext_synonyms(fontext)

if fontpaths is None:

if sys.platform == 'win32':

fontpaths = MSUserFontDirectories + [win32FontDirectory()]

# now get all installed fonts directly...

fontfiles.update(win32InstalledFonts(fontext=fontext))

else:

fontpaths = X11FontDirectories

if sys.platform == 'darwin':

fontpaths = [*X11FontDirectories, *OSXFontDirectories]

fontfiles.update(get_fontconfig_fonts(fontext))

elif isinstance(fontpaths, str):

fontpaths = [fontpaths]

for path in fontpaths:

fontfiles.update(map(os.path.abspath, list_fonts(path, fontexts)))

return [fname for fname in fontfiles if os.path.exists(fname)]

class FontEntry:

"""

A class for storing Font properties. It is used when populating

the font lookup dictionary.

"""

def __init__(self,

fname ='',

name ='',

style ='normal',

variant='normal',

weight ='normal',

stretch='normal',

size ='medium',

):

self.fname = fname

self.name = name

self.style = style

self.variant = variant

self.weight = weight

self.stretch = stretch

try:

self.size = str(float(size))

except ValueError:

self.size = size

def __repr__(self):

return "<Font '%s' (%s) %s %s %s %s>" % (

self.name, os.path.basename(self.fname), self.style, self.variant,

self.weight, self.stretch)

def ttfFontProperty(font):

"""

Extract information from a TrueType font file.

Parameters

----------

font : `.FT2Font`

The TrueType font file from which information will be extracted.

Returns

-------

`FontEntry`

The extracted font properties.

"""

name = font.family_name

# Styles are: italic, oblique, and normal (default)

sfnt = font.get_sfnt()

mac_key = (1, # platform: macintosh

0, # id: roman

0) # langid: english

ms_key = (3, # platform: microsoft

1, # id: unicode_cs

0x0409) # langid: english_united_states

# These tables are actually mac_roman-encoded, but mac_roman support may be

# missing in some alternative Python implementations and we are only going

# to look for ASCII substrings, where any ASCII-compatible encoding works

# - or big-endian UTF-16, since important Microsoft fonts use that.

sfnt2 = (sfnt.get((*mac_key, 2), b'').decode('latin-1').lower() or

sfnt.get((*ms_key, 2), b'').decode('utf_16_be').lower())

sfnt4 = (sfnt.get((*mac_key, 4), b'').decode('latin-1').lower() or

sfnt.get((*ms_key, 4), b'').decode('utf_16_be').lower())

if sfnt4.find('oblique') >= 0:

style = 'oblique'

elif sfnt4.find('italic') >= 0:

style = 'italic'

elif sfnt2.find('regular') >= 0:

style = 'normal'

elif font.style_flags & ft2font.ITALIC:

style = 'italic'

else:

style = 'normal'

# Variants are: small-caps and normal (default)

# !!!! Untested

if name.lower() in ['capitals', 'small-caps']:

variant = 'small-caps'

else:

variant = 'normal'

# The weight-guessing algorithm is directly translated from fontconfig

# 2.13.1's FcFreeTypeQueryFaceInternal (fcfreetype.c).

wws_subfamily = 22

typographic_subfamily = 16

font_subfamily = 2

styles = [

sfnt.get((*mac_key, wws_subfamily), b'').decode('latin-1'),

sfnt.get((*mac_key, typographic_subfamily), b'').decode('latin-1'),

sfnt.get((*mac_key, font_subfamily), b'').decode('latin-1'),

sfnt.get((*ms_key, wws_subfamily), b'').decode('utf-16-be'),

sfnt.get((*ms_key, typographic_subfamily), b'').decode('utf-16-be'),

sfnt.get((*ms_key, font_subfamily), b'').decode('utf-16-be'),

]

styles = [*filter(None, styles)] or [font.style_name]

def get_weight(): # From fontconfig's FcFreeTypeQueryFaceInternal.

# OS/2 table weight.

os2 = font.get_sfnt_table("OS/2")

if os2 and os2["version"] != 0xffff:

return os2["usWeightClass"]

# PostScript font info weight.

try:

ps_font_info_weight = (

font.get_ps_font_info()["weight"].replace(" ", "") or "")

except ValueError:

pass

else:

for regex, weight in _weight_regexes:

if re.fullmatch(regex, ps_font_info_weight, re.I):

return weight

# Style name weight.

for style in styles:

style = style.replace(" ", "")

for regex, weight in _weight_regexes:

if re.search(regex, style, re.I):

return weight

if font.style_flags & ft2font.BOLD:

return 700 # "bold"

return 500 # "medium", not "regular"!

weight = int(get_weight())

# Stretch can be absolute and relative

# Absolute stretches are: ultra-condensed, extra-condensed, condensed,

# semi-condensed, normal, semi-expanded, expanded, extra-expanded,

# and ultra-expanded.

# Relative stretches are: wider, narrower

# Child value is: inherit

if any(word in sfnt4 for word in ['narrow', 'condensed', 'cond']):

stretch = 'condensed'

elif 'demi cond' in sfnt4:

stretch = 'semi-condensed'

elif any(word in sfnt4 for word in ['wide', 'expanded', 'extended']):

stretch = 'expanded'

else:

stretch = 'normal'

# Sizes can be absolute and relative.

# Absolute sizes are: xx-small, x-small, small, medium, large, x-large,

# and xx-large.

# Relative sizes are: larger, smaller

# Length value is an absolute font size, e.g., 12pt

# Percentage values are in 'em's. Most robust specification.

if not font.scalable:

raise NotImplementedError("Non-scalable fonts are not supported")

size = 'scalable'

return FontEntry(font.fname, name, style, variant, weight, stretch, size)

def afmFontProperty(fontpath, font):

"""

Extract information from an AFM font file.

Parameters

----------

font : `.AFM`

The AFM font file from which information will be extracted.

Returns

-------

`FontEntry`

The extracted font properties.

"""

name = font.get_familyname()

fontname = font.get_fontname().lower()

# Styles are: italic, oblique, and normal (default)

if font.get_angle() != 0 or 'italic' in name.lower():

style = 'italic'

elif 'oblique' in name.lower():

style = 'oblique'

else:

style = 'normal'

# Variants are: small-caps and normal (default)

# !!!! Untested

if name.lower() in ['capitals', 'small-caps']:

variant = 'small-caps'

else:

variant = 'normal'

weight = font.get_weight().lower()

if weight not in weight_dict:

weight = 'normal'

# Stretch can be absolute and relative

# Absolute stretches are: ultra-condensed, extra-condensed, condensed,

# semi-condensed, normal, semi-expanded, expanded, extra-expanded,

# and ultra-expanded.

# Relative stretches are: wider, narrower

# Child value is: inherit

if 'demi cond' in fontname:

stretch = 'semi-condensed'

elif any(word in fontname for word in ['narrow', 'cond']):

stretch = 'condensed'

elif any(word in fontname for word in ['wide', 'expanded', 'extended']):

stretch = 'expanded'

else:

stretch = 'normal'

# Sizes can be absolute and relative.

# Absolute sizes are: xx-small, x-small, small, medium, large, x-large,

# and xx-large.

# Relative sizes are: larger, smaller

# Length value is an absolute font size, e.g., 12pt

# Percentage values are in 'em's. Most robust specification.

# All AFM fonts are apparently scalable.

size = 'scalable'

return FontEntry(fontpath, name, style, variant, weight, stretch, size)

class FontProperties:

"""

A class for storing and manipulating font properties.

The font properties are the six properties described in the

`W3C Cascading Style Sheet, Level 1

<http://www.w3.org/TR/1998/REC-CSS2-19980512/>`_ font

specification and *math_fontfamily* for math fonts:

- family: A list of font names in decreasing order of priority.

The items may include a generic font family name, either

'sans-serif' (default), 'serif', 'cursive', 'fantasy', or 'monospace'.

In that case, the actual font to be used will be looked up

from the associated rcParam.

- style: Either 'normal' (default), 'italic' or 'oblique'.

- variant: Either 'normal' (default) or 'small-caps'.

- stretch: A numeric value in the range 0-1000 or one of

'ultra-condensed', 'extra-condensed', 'condensed',

'semi-condensed', 'normal' (default), 'semi-expanded', 'expanded',

'extra-expanded' or 'ultra-expanded'.

- weight: A numeric value in the range 0-1000 or one of

'ultralight', 'light', 'normal' (default), 'regular', 'book', 'medium',

'roman', 'semibold', 'demibold', 'demi', 'bold', 'heavy',

'extra bold', 'black'.

- size: Either an relative value of 'xx-small', 'x-small',

'small', 'medium', 'large', 'x-large', 'xx-large' or an

absolute font size, e.g., 10 (default).

- math_fontfamily: The family of fonts used to render math text; overrides

:rc:`mathtext.fontset`. Supported values are the same as the ones

supported by :rc:`mathtext.fontset`: 'dejavusans', 'dejavuserif', 'cm',

'stix', 'stixsans' and 'custom'.

Alternatively, a font may be specified using the absolute path to a font

file, by using the *fname* kwarg. However, in this case, it is typically

simpler to just pass the path (as a `pathlib.Path`, not a `str`) to the

*font* kwarg of the `.Text` object.

The preferred usage of font sizes is to use the relative values,

e.g., 'large', instead of absolute font sizes, e.g., 12. This

approach allows all text sizes to be made larger or smaller based

on the font manager's default font size.

This class will also accept a fontconfig_ pattern_, if it is the only

argument provided. This support does not depend on fontconfig; we are

merely borrowing its pattern syntax for use here.

.. _fontconfig: https://www.freedesktop.org/wiki/Software/fontconfig/

.. _pattern:

https://www.freedesktop.org/software/fontconfig/fontconfig-user.html

Note that Matplotlib's internal font manager and fontconfig use a

different algorithm to lookup fonts, so the results of the same pattern

may be different in Matplotlib than in other applications that use

fontconfig.

"""

def __init__(self,

family = None,

style = None,

variant= None,

weight = None,

stretch= None,

size = None,

fname = None, # if set, it's a hardcoded filename to use

math_fontfamily = None,

):

self._family = _normalize_font_family(rcParams['font.family'])

self._slant = rcParams['font.style']

self._variant = rcParams['font.variant']

self._weight = rcParams['font.weight']

self._stretch = rcParams['font.stretch']

self._size = rcParams['font.size']

self._file = None

self._math_fontfamily = None

if isinstance(family, str):

# Treat family as a fontconfig pattern if it is the only

# parameter provided.

if (style is None and variant is None and weight is None and

stretch is None and size is None and fname is None):

self.set_fontconfig_pattern(family)

return

self.set_family(family)

self.set_style(style)

self.set_variant(variant)

self.set_weight(weight)

self.set_stretch(stretch)

self.set_file(fname)

self.set_size(size)

self.set_math_fontfamily(math_fontfamily)

@classmethod

def _from_any(cls, arg):

"""

Generic constructor which can build a `.FontProperties` from any of the

following:

- a `.FontProperties`: it is passed through as is;

- `None`: a `.FontProperties` using rc values is used;

- an `os.PathLike`: it is used as path to the font file;

- a `str`: it is parsed as a fontconfig pattern;

- a `dict`: it is passed as ``**kwargs`` to `.FontProperties`.

"""

if isinstance(arg, cls):

return arg

elif arg is None:

return cls()

elif isinstance(arg, os.PathLike):

return cls(fname=arg)

elif isinstance(arg, str):

return cls(arg)

else:

return cls(**arg)

def __hash__(self):

l = (tuple(self.get_family()),

self.get_slant(),

self.get_variant(),

self.get_weight(),

self.get_stretch(),

self.get_size_in_points(),

self.get_file(),

self.get_math_fontfamily())

return hash(l)

def __eq__(self, other):

return hash(self) == hash(other)

def __str__(self):

return self.get_fontconfig_pattern()

def get_family(self):

"""

Return a list of font names that comprise the font family.

"""

return self._family

def get_name(self):

"""

Return the name of the font that best matches the font properties.

"""

return get_font(findfont(self)).family_name

def get_style(self):

"""

Return the font style. Values are: 'normal', 'italic' or 'oblique'.

"""

return self._slant

get_slant = get_style

def get_variant(self):

"""

Return the font variant. Values are: 'normal' or 'small-caps'.

"""

return self._variant

def get_weight(self):

"""

Set the font weight. Options are: A numeric value in the

range 0-1000 or one of 'light', 'normal', 'regular', 'book',

'medium', 'roman', 'semibold', 'demibold', 'demi', 'bold',

'heavy', 'extra bold', 'black'

"""

return self._weight

def get_stretch(self):

"""

Return the font stretch or width. Options are: 'ultra-condensed',

'extra-condensed', 'condensed', 'semi-condensed', 'normal',

'semi-expanded', 'expanded', 'extra-expanded', 'ultra-expanded'.

"""

return self._stretch

def get_size(self):

"""

Return the font size.

"""

return self._size

def get_size_in_points(self):

return self._size

def get_file(self):

"""

Return the filename of the associated font.

"""

return self._file

def get_fontconfig_pattern(self):

"""

Get a fontconfig_ pattern_ suitable for looking up the font as

specified with fontconfig's ``fc-match`` utility.

This support does not depend on fontconfig; we are merely borrowing its

pattern syntax for use here.

"""

return generate_fontconfig_pattern(self)

def set_family(self, family):

"""

Change the font family. May be either an alias (generic name

is CSS parlance), such as: 'serif', 'sans-serif', 'cursive',

'fantasy', or 'monospace', a real font name or a list of real

font names. Real font names are not supported when

:rc:`text.usetex` is `True`.

"""

if family is None:

family = rcParams['font.family']

self._family = _normalize_font_family(family)

set_name = set_family

def set_style(self, style):

"""

Set the font style. Values are: 'normal', 'italic' or 'oblique'.

"""

if style is None:

style = rcParams['font.style']

_api.check_in_list(['normal', 'italic', 'oblique'], style=style)

self._slant = style

set_slant = set_style

def set_variant(self, variant):

"""

Set the font variant. Values are: 'normal' or 'small-caps'.

"""

if variant is None:

variant = rcParams['font.variant']

_api.check_in_list(['normal', 'small-caps'], variant=variant)

self._variant = variant

def set_weight(self, weight):

"""

Set the font weight. May be either a numeric value in the

range 0-1000 or one of 'ultralight', 'light', 'normal',

'regular', 'book', 'medium', 'roman', 'semibold', 'demibold',

'demi', 'bold', 'heavy', 'extra bold', 'black'

"""

if weight is None:

weight = rcParams['font.weight']

try:

weight = int(weight)

if weight < 0 or weight > 1000:

raise ValueError()

except ValueError:

if weight not in weight_dict:

raise ValueError("weight is invalid")

self._weight = weight

def set_stretch(self, stretch):

"""

Set the font stretch or width. Options are: 'ultra-condensed',

'extra-condensed', 'condensed', 'semi-condensed', 'normal',

'semi-expanded', 'expanded', 'extra-expanded' or

'ultra-expanded', or a numeric value in the range 0-1000.

"""

if stretch is None:

stretch = rcParams['font.stretch']

try:

stretch = int(stretch)

if stretch < 0 or stretch > 1000:

raise ValueError()

except ValueError as err:

if stretch not in stretch_dict:

raise ValueError("stretch is invalid") from err

self._stretch = stretch

def set_size(self, size):

"""

Set the font size. Either an relative value of 'xx-small',

'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large'

or an absolute font size, e.g., 12.

"""

if size is None:

size = rcParams['font.size']

try:

size = float(size)

except ValueError:

try:

scale = font_scalings[size]

except KeyError as err:

raise ValueError(

"Size is invalid. Valid font size are "

+ ", ".join(map(str, font_scalings))) from err

else:

size = scale * FontManager.get_default_size()

if size < 1.0:

_log.info('Fontsize %1.2f < 1.0 pt not allowed by FreeType. '

'Setting fontsize = 1 pt', size)

size = 1.0

self._size = size

def set_file(self, file):

"""

Set the filename of the fontfile to use. In this case, all

other properties will be ignored.

"""

self._file = os.fspath(file) if file is not None else None

def set_fontconfig_pattern(self, pattern):

"""

Set the properties by parsing a fontconfig_ *pattern*.

This support does not depend on fontconfig; we are merely borrowing its

pattern syntax for use here.

"""

for key, val in parse_fontconfig_pattern(pattern).items():

if type(val) == list:

getattr(self, "set_" + key)(val[0])

else:

getattr(self, "set_" + key)(val)

def get_math_fontfamily(self):

"""

Return the name of the font family used for math text.

The default font is :rc:`mathtext.fontset`.

"""

return self._math_fontfamily

def set_math_fontfamily(self, fontfamily):

"""

Set the font family for text in math mode.

If not set explicitly, :rc:`mathtext.fontset` will be used.

Parameters

----------

fontfamily : str

The name of the font family.

Available font families are defined in the

matplotlibrc.template file

:ref:`here <customizing-with-matplotlibrc-files>`

See Also

--------

.text.Text.get_math_fontfamily

"""

if fontfamily is None:

fontfamily = rcParams['mathtext.fontset']

else:

valid_fonts = _validators['mathtext.fontset'].valid.values()

# _check_in_list() Validates the parameter math_fontfamily as

# if it were passed to rcParams['mathtext.fontset']

_api.check_in_list(valid_fonts, math_fontfamily=fontfamily)

self._math_fontfamily = fontfamily

def copy(self):

"""Return a copy of self."""

new = type(self)()

vars(new).update(vars(self))

return new

class _JSONEncoder(json.JSONEncoder):

def default(self, o):

if isinstance(o, FontManager):

return dict(o.__dict__, __class__='FontManager')

elif isinstance(o, FontEntry):

d = dict(o.__dict__, __class__='FontEntry')

try:

# Cache paths of fonts shipped with Matplotlib relative to the

# Matplotlib data path, which helps in the presence of venvs.

d["fname"] = str(

Path(d["fname"]).relative_to(mpl.get_data_path()))

except ValueError:

pass

return d

else:

return super().default(o)

def _json_decode(o):

cls = o.pop('__class__', None)

if cls is None:

return o

elif cls == 'FontManager':

r = FontManager.__new__(FontManager)

r.__dict__.update(o)

return r

elif cls == 'FontEntry':

r = FontEntry.__new__(FontEntry)

r.__dict__.update(o)

if not os.path.isabs(r.fname):

r.fname = os.path.join(mpl.get_data_path(), r.fname)

return r

else:

raise ValueError("Don't know how to deserialize __class__=%s" % cls)

def json_dump(data, filename):

"""

Dump `FontManager` *data* as JSON to the file named *filename*.

See Also

--------

json_load

Notes

-----

File paths that are children of the Matplotlib data path (typically, fonts

shipped with Matplotlib) are stored relative to that data path (to remain

valid across virtualenvs).

This function temporarily locks the output file to prevent multiple

processes from overwriting one another's output.

"""

with cbook._lock_path(filename), open(filename, 'w') as fh:

try:

json.dump(data, fh, cls=_JSONEncoder, indent=2)

except OSError as e:

_log.warning('Could not save font_manager cache {}'.format(e))

def json_load(filename):

"""

Load a `FontManager` from the JSON file named *filename*.