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1139 lines (960 loc) · 37.6 KB
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"""
A module for finding, managing, and using fonts across-platforms.
This module provides a single FontManager 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. 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
- font size_adjust is incomplete
- default font algorithm needs improvement and testing
- setWeights function needs improvement
- 'light' is an invalid weight value, remove it.
- update_fonts not implemented
Authors : John Hunter <jdhunter@ace.bsd.uchicago.edu>
Paul Barrett <Barrett@STScI.Edu>
Copyright : John Hunter (2004,2005), Paul Barrett (2004,2005)
License : matplotlib license (PSF compatible)
The font directory code is from ttfquery,
see license/LICENSE_TTFQUERY.
"""
import os, sys, glob
from sets import Set
import matplotlib
from matplotlib import afm
from matplotlib import ft2font
from matplotlib import rcParams, get_configdir
from matplotlib.cbook import is_string_like
from matplotlib.fontconfig_pattern import \
parse_fontconfig_pattern, generate_fontconfig_pattern
try:
import cPickle as pickle
except ImportError:
import pickle
USE_FONTCONFIG = False
verbose = matplotlib.verbose
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}
weight_dict = {'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}
# OS Font paths
MSFolders = \
r'Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders'
MSFontDirectories = [
r'SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts',
r'SOFTWARE\Microsoft\Windows\CurrentVersion\Fonts']
X11FontDirectories = [
# an old standard installation point
"/usr/X11R6/lib/X11/fonts/TTF/",
# 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/",
]
OSXFontDirectories = [
"/Library/Fonts/",
"/Network/Library/Fonts/",
"/System/Library/Fonts/"
]
if not USE_FONTCONFIG:
home = os.environ.get('HOME')
if home is not None:
# user fonts on OSX
path = os.path.join(home, 'Library', 'Fonts')
OSXFontDirectories.append(path)
path = os.path.join(home, '.fonts')
X11FontDirectories.append(path)
def get_fontext_synonyms(fontext):
return {'ttf': ('ttf', 'otf'),
'afm': ('afm',)}[fontext]
def win32FontDirectory():
"""Return the user-specified font directory for Win32."""
try:
import _winreg
except ImportError:
return os.path.join(os.environ['WINDIR'], 'Fonts')
else:
user = _winreg.OpenKey(_winreg.HKEY_CURRENT_USER, MSFolders)
try:
return _winreg.QueryValueEx(user, 'Fonts')[0]
finally:
_winreg.CloseKey(user)
return None
def win32InstalledFonts(directory=None, fontext='ttf'):
"""
Search for fonts in the specified font directory, or use the
system directories if none given. A list of TrueType fonts are
returned by default with AFM fonts as an option.
"""
import _winreg
if directory is None:
directory = win32FontDirectory()
fontext = get_fontext_synonyms(fontext)
key, items = None, {}
for fontdir in MSFontDirectories:
try:
local = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, fontdir)
except OSError:
continue
if not local:
files = []
for ext in fontext:
files.extend(glob.glob(os.path.join(directory, '*.'+ext)))
return files
try:
for j in range(_winreg.QueryInfoKey(local)[1]):
try:
key, direc, any = _winreg.EnumValue( local, j)
if not os.path.dirname(direc):
direc = os.path.join(directory, direc)
direc = os.path.abspath(direc).lower()
if os.path.splitext(direc)[1][1:] in fontext:
items[direc] = 1
except EnvironmentError:
continue
except WindowsError:
continue
return items.keys()
finally:
_winreg.CloseKey(local)
return None
def OSXFontDirectory():
"""Return the system font directories for OS X."""
fontpaths = []
def add(arg,directory,files):
fontpaths.append(directory)
for fontdir in OSXFontDirectories:
try:
if os.path.isdir(fontdir):
os.path.walk(fontdir, add, None)
except (IOError, OSError, TypeError, ValueError):
pass
return fontpaths
def OSXInstalledFonts(directory=None, fontext='ttf'):
"""Get list of font files on OS X - ignores font suffix by default"""
if directory is None:
directory = OSXFontDirectory()
fontext = get_fontext_synonyms(fontext)
files = []
for path in directory:
if fontext is None:
files.extend(glob.glob(os.path.join(path,'*')))
else:
for ext in fontext:
files.extend(glob.glob(os.path.join(path, '*.'+ext)))
files.extend(glob.glob(os.path.join(path, '*.'+ext.upper())))
return files
def x11FontDirectory():
"""Return the system font directories for X11."""
fontpaths = []
def add(arg,directory,files):
fontpaths.append(directory)
for fontdir in X11FontDirectories:
try:
if os.path.isdir(fontdir):
os.path.walk(fontdir, add, None)
except (IOError, OSError, TypeError, ValueError):
pass
return fontpaths
def get_fontconfig_fonts(fontext='ttf'):
"""Grab a list of all the fonts that are being tracked by fontconfig.
This is an easy way to grab all of the fonts the user wants to be made
available to applications, without knowing where all of them reside."""
try:
import commands
except ImportError:
return {}
fontext = get_fontext_synonyms(fontext)
fontfiles = {}
status, output = commands.getstatusoutput("fc-list file")
if status == 0:
for line in output.split('\n'):
fname = line.split(':')[0]
if (os.path.splitext(fname)[1][1:] in fontext and
os.path.exists(fname)):
fontfiles[fname] = 1
return fontfiles
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 = {}
fontexts = get_fontext_synonyms(fontext)
if fontpaths is None:
if sys.platform == 'win32':
fontdir = win32FontDirectory()
fontpaths = [fontdir]
# now get all installed fonts directly...
for f in win32InstalledFonts(fontdir):
base, ext = os.path.splitext(f)
if len(ext)>1 and ext[1:].lower() in fontexts:
fontfiles[f] = 1
else:
fontpaths = x11FontDirectory()
# check for OS X & load its fonts if present
if sys.platform == 'darwin':
for f in OSXInstalledFonts(fontext=fontext):
fontfiles[f] = 1
for f in get_fontconfig_fonts(fontext):
fontfiles[f] = 1
elif isinstance(fontpaths, (str, unicode)):
fontpaths = [fontpaths]
for path in fontpaths:
files = []
for ext in fontexts:
files.extend(glob.glob(os.path.join(path, '*.'+ext)))
files.extend(glob.glob(os.path.join(path, '*.'+ext.upper())))
for fname in files:
fontfiles[os.path.abspath(fname)] = 1
return [fname for fname in fontfiles.keys() if os.path.exists(fname)]
def weight_as_number(weight):
"""
Return the weight property as a numeric value. String values
are converted to their corresponding numeric value.
"""
if isinstance(weight, str):
try:
weight = weight_dict[weight.lower()]
except KeyError:
weight = 400
elif weight in range(100, 1000, 100):
pass
else:
raise ValueError, 'weight not a valid integer'
return weight
class FontKey(object):
"""
A class for storing Font properties. It is used when populating
the font dictionary.
"""
def __init__(self,
name ='',
style ='normal',
variant='normal',
weight ='normal',
stretch='normal',
size ='medium'
):
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 ttfFontProperty(font):
"""
A function for populating the FontKey by extracting information
from the TrueType font file.
"""
name = font.family_name
# Styles are: italic, oblique, and normal (default)
sfnt = font.get_sfnt()
sfnt2 = sfnt.get((1,0,0,2))
sfnt4 = sfnt.get((1,0,0,4))
if sfnt2:
sfnt2 = sfnt2.lower()
else:
sfnt2 = ''
if sfnt4:
sfnt4 = sfnt4.lower()
else:
sfnt4 = ''
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'
# Weights are: 100, 200, 300, 400 (normal: default), 500 (medium),
# 600 (semibold, demibold), 700 (bold), 800 (heavy), 900 (black)
# lighter and bolder are also allowed.
weight = None
for w in weight_dict.keys():
if sfnt4.find(w) >= 0:
weight = w
break
if not weight:
if font.style_flags & ft2font.BOLD:
weight = 700
else:
weight = 400
weight = weight_as_number(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
# !!!! Incomplete
if sfnt4.find('narrow') >= 0 or sfnt4.find('condensed') >= 0 or \
sfnt4.find('cond') >= 0:
stretch = 'condensed'
elif sfnt4.find('demi cond') >= 0:
stretch = 'semi-condensed'
elif sfnt4.find('wide') >= 0 or sfnt4.find('expanded') >= 0:
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.
# !!!! Incomplete
if font.scalable:
size = 'scalable'
else:
size = str(float(font.get_fontsize()))
# !!!! Incomplete
size_adjust = None
return FontKey(name, style, variant, weight, stretch, size)
def afmFontProperty(font):
"""
A function for populating the FontKey by extracting information
from the AFM font file.
"""
name = font.get_familyname()
# Styles are: italic, oblique, and normal (default)
if font.get_angle() != 0 or name.lower().find('italic') >= 0:
style = 'italic'
elif name.lower().find('oblique') >= 0:
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'
# Weights are: 100, 200, 300, 400 (normal: default), 500 (medium),
# 600 (semibold, demibold), 700 (bold), 800 (heavy), 900 (black)
# lighter and bolder are also allowed.
weight = weight_as_number(font.get_weight().lower())
# 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
# !!!! Incomplete
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'
# !!!! Incomplete
size_adjust = None
return FontKey(name, style, variant, weight, stretch, size)
def add_filename(fontdict, prop, fname):
"""
A function to add a font file name to the font dictionary using
the FontKey properties. If a font property has no dictionary, then
create it.
"""
try:
size = str(float(prop.size))
except ValueError:
size = prop.size
d = fontdict. \
setdefault(prop.name, {}).\
setdefault(prop.style, {}).\
setdefault(prop.variant, {}).\
setdefault(prop.weight, {}).\
setdefault(prop.stretch, {})
d[size] = fname
def createFontDict(fontfiles, fontext='ttf'):
"""
A function to create a dictionary of font file paths. The
default is to create a dictionary for TrueType fonts. An AFM font
dictionary can optionally be created.
"""
fontdict = {}
# Add fonts from list of known font files.
seen = {}
for fpath in fontfiles:
verbose.report('createFontDict: %s' % (fpath), 'debug')
fname = os.path.split(fpath)[1]
if seen.has_key(fname): continue
else: seen[fname] = 1
if fontext == 'afm':
try:
fh = open(fpath, 'r')
except:
verbose.report("Could not open font file %s" % fpath)
continue
try:
try:
font = afm.AFM(fh)
finally:
fh.close()
except RuntimeError:
verbose.report("Could not parse font file %s"%fpath)
continue
prop = afmFontProperty(font)
else:
try:
font = ft2font.FT2Font(str(fpath))
except RuntimeError:
verbose.report("Could not open font file %s"%fpath)
continue
except UnicodeError:
verbose.report("Cannot handle unicode filenames")
#print >> sys.stderr, 'Bad file is', fpath
continue
try: prop = ttfFontProperty(font)
except: continue
add_filename(fontdict, prop, fpath)
return fontdict
def setWeights(font):
"""
A function to populate missing values in a font weight
dictionary. This proceedure is necessary since the font finding
algorithm always matches on the weight property.
"""
# !!!! Not completely correct
temp = font.copy()
if len(temp) == 1:
wgt = temp.keys()[0]
for j in range(100, 1000, 100):
font[j] = temp[wgt]
if temp.has_key(400):
for j in range(100, 1000, 100):
font[j] = temp[400]
if temp.has_key(500):
if temp.has_key(400):
for j in range(500, 1000, 100):
font[j] = temp[500]
else:
for j in range(100, 1000, 100):
font[j] = temp[500]
if temp.has_key(300):
for j in [100, 200, 300]:
font[j] = temp[300]
if temp.has_key(200):
if temp.has_key(300):
for j in [100, 200]:
font[j] = temp[200]
else:
for j in [100, 200, 300]:
font[j] = temp[200]
if temp.has_key(800):
for j in [600, 700, 800, 900]:
font[j] = temp[800]
if temp.has_key(700):
if temp.has_key(800):
for j in [600, 700]:
font[j] = temp[700]
else:
for j in [600, 700, 800, 900]:
font[j] = temp[700]
class FontProperties(object):
"""
A class for storing and manipulating font properties.
The font properties are those described in the W3C Cascading Style
Sheet, Level 1 (CSS1; http://www.w3.org/TR/1998/REC-CSS2-19980512/)
font specification. The six properties are:
family - A list of font names in decreasing order of priority.
The last item is the default font name and is given the
name of the font family, either serif, sans-serif,
cursive, fantasy, and monospace.
style - Either normal, italic or oblique.
variant - Either normal or small-caps.
stretch - Either an absolute value of ultra-condensed, extra-
condensed, condensed, semi-condensed, normal, semi-
expanded, expanded, extra-expanded or ultra-expanded;
or a relative value of narrower or wider.
This property is currently not implemented and is set to
normal.
weight - A numeric value in the range 100, 200, 300, ..., 900.
size - Either an absolute value of xx-small, x-small, small,
medium, large, x-large, xx-large; or a relative value
of smaller or larger; or an absolute font size, e.g. 12;
or scalable.
The default font property for TrueType fonts is: sans-serif, normal,
normal, normal, 400, scalable.
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, i.e. by using the set_default_size() method of the
font manager.
This class will also accept a fontconfig pattern, if it is the only
argument provided. fontconfig patterns are described here:
http://www.fontconfig.org/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.
"""
class FontPropertiesSet(object):
"""This class contains all of the default properties at the
class level, which are then overridden (only if provided) at
the instance level."""
family = rcParams['font.' + rcParams['font.family']]
if is_string_like(family):
family = [family]
slant = [rcParams['font.style']]
variant = [rcParams['font.variant']]
weight = [rcParams['font.weight']]
stretch = [rcParams['font.stretch']]
size = [rcParams['font.size']]
file = None
def __init__(self,
family = None,
style = None,
variant= None,
weight = None,
stretch= None,
size = None,
fname = None, # if this is set, it's a hardcoded filename to use
_init = None # used only by copy()
):
self.__props = self.FontPropertiesSet()
# This is used only by copy()
if _init is not None:
self.__props.__dict__.update(_init)
return
if is_string_like(family):
# 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.__props.__dict__ = self._parse_fontconfig_pattern(family)
return
family = [family]
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)
def _parse_fontconfig_pattern(self, pattern):
return parse_fontconfig_pattern(pattern)
def __hash__(self):
return hash(repr(self.__props))
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.__props.family
def get_name(self):
"""Return the name of the font that best matches the font properties."""
return ft2font.FT2Font(str(findfont(self))).family_name
def get_style(self):
"""Return the font style. Values are: normal, italic or oblique."""
return self.__props.slant[0]
def get_variant(self):
"""Return the font variant. Values are: normal or small-caps."""
return self.__props.variant[0]
def get_weight(self):
"""
Return the font weight. See the FontProperties class for a
a list of possible values.
"""
return self.__props.weight[0]
def get_stretch(self):
"""
Return the font stretch or width. Options are: normal,
narrow, condensed, or wide.
"""
return self.__props.stretch[0]
def get_size(self):
"""Return the font size."""
return float(self.__props.size[0])
def get_file(self):
if self.__props.file is not None:
return self.__props.file[0]
else:
return None
def get_fontconfig_pattern(self):
return generate_fontconfig_pattern(self.__props.__dict__)
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, or a real font name.
"""
if family is None:
self.__props.__dict__.pop('family', None)
else:
if is_string_like(family):
family = [family]
self.__props.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:
self.__props.__dict__.pop('style', None)
else:
if style not in ('normal', 'italic', 'oblique'):
raise ValueError("style must be normal, italic or oblique")
self.__props.slant = [style]
def set_variant(self, variant):
"""Set the font variant. Values are: normal or small-caps."""
if variant is None:
self.__props.__dict__.pop('variant', None)
else:
if variant not in ('normal', 'small-caps'):
raise ValueError("variant must be normal or small-caps")
self.__props.variant = [variant]
def set_weight(self, weight):
"""
Set the font weight. See the FontProperties class for a
a list of possible values.
"""
if weight is None:
self.__props.__dict__.pop('weight', None)
else:
if (weight not in weight_dict and
weight not in weight_dict.keys()):
raise ValueError("weight is invalid")
self.__props.weight = [weight]
def set_stretch(self, stretch):
"""
Set the font stretch or width. Options are: normal, narrow,
condensed, or wide.
"""
if stretch is None:
self.__props.__dict__.pop('stretch', None)
else:
self.__props.stretch = [stretch]
def set_size(self, size):
"""Set the font size."""
if size is None:
self.__props.__dict__.pop('size', None)
else:
if is_string_like(size):
parent_size = fontManager.get_default_size()
scaling = font_scalings.get(size)
if scaling is not None:
size = parent_size * scaling
else:
size = parent_size
if isinstance(size, (int, float)):
size = [size]
self.__props.size = size
def set_file(self, file):
if file is None:
self.__props.__dict__.pop('file', None)
else:
self.__props.file = [file]
get_size_in_points = get_size
def set_fontconfig_pattern(self, pattern):
self.__props.__dict__ = self._parse_fontconfig_pattern(pattern)
def add_property_pair(self, key, val):
self.__props.setdefault(key, []).append(val)
def copy(self):
"""Return a deep copy of self"""
return FontProperties(_init = self.__props.__dict__)
def ttfdict_to_fnames(d):
'flatten a ttfdict to all the filenames it contains'
fnames = []
for named in d.values():
for styled in named.values():
for variantd in styled.values():
for weightd in variantd.values():
for stretchd in weightd.values():
for fname in stretchd.values():
fnames.append(fname)
return fnames
def pickle_dump(data, filename):
"""Equivalent to pickle.dump(data, open(filename, 'w'))
but closes the file to prevent filehandle leakage."""
fh = open(filename, 'w')
try:
pickle.dump(data, fh)
finally:
fh.close()
def pickle_load(filename):
"""Equivalent to pickle.load(open(filename, 'r'))
but closes the file to prevent filehandle leakage."""
fh = open(filename, 'r')
try:
data = pickle.load(fh)
finally:
fh.close()
return data
class FontManager:
"""
On import, the FontManager creates a dictionary of TrueType
fonts based on the font properties: name, style, variant, weight,
stretch, and size. The findfont() method searches this dictionary
for a font file name that exactly matches the font properties of the
specified text. If none is found, a default font is returned. By
updating the dictionary with the properties of the found font, the
font dictionary can act like a font cache.
"""
def __init__(self, size=None, weight='normal'):
self.__default_weight = weight
self.default_size = size
paths = [os.path.join(rcParams['datapath'],'fonts','ttf'),
os.path.join(rcParams['datapath'],'fonts','afm')]
# Create list of font paths
for pathname in ['TTFPATH', 'AFMPATH']:
if os.environ.has_key(pathname):
ttfpath = os.environ[pathname]
if ttfpath.find(';') >= 0: #win32 style
paths.extend(ttfpath.split(';'))
elif ttfpath.find(':') >= 0: # unix style
paths.extend(ttfpath.split(':'))
else:
paths.append(ttfpath)
verbose.report('font search path %s'%(str(paths)))
# Load TrueType fonts and create font dictionary.
self.ttffiles = findSystemFonts(paths) + findSystemFonts()
for fname in self.ttffiles:
verbose.report('trying fontname %s' % fname, 'debug')
if fname.lower().find('vera.ttf')>=0:
self.defaultFont = fname
break
else:
# use anything
self.defaultFont = self.ttffiles[0]
self.ttfdict = createFontDict(self.ttffiles)
if rcParams['pdf.use14corefonts']:
# Load only the 14 PDF core fonts. These fonts do not need to be
# embedded; every PDF viewing application is required to have them:
# Helvetica, Helvetica-Bold, Helvetica-Oblique, Helvetica-BoldOblique,
# Courier, Courier-Bold, Courier-Oblique, Courier-BoldOblique,
# Times-Roman, Times-Bold, Times-Italic, Times-BoldItalic, Symbol,
# ZapfDingbats.
afmpath = os.path.join(rcParams['datapath'],'fonts','pdfcorefonts')
afmfiles = findSystemFonts(afmpath, fontext='afm')
self.afmdict = createFontDict(afmfiles, fontext='afm')
else:
self.afmfiles = findSystemFonts(paths, fontext='afm') + \
findSystemFonts(fontext='afm')
self.afmdict = createFontDict(self.afmfiles, fontext='afm')
def get_default_weight(self):
"Return the default font weight."
return self.__default_weight
def get_default_size(self):
"Return the default font size."
if self.default_size is None:
return rcParams['font.size']
return self.default_size
def set_default_weight(self, weight):
"Set the default font weight. The initial value is 'normal'."
self.__default_weight = weight
def set_default_size(self, size):
"Set the default font size in points. The initial value is set by font.size in rc."
self.__default_size = size
def update_fonts(self, filenames):
"""
Update the font dictionary with new font files.
Currently not implemented.
"""
# !!!! Needs implementing
raise NotImplementedError
def findfont(self, prop, fontext='ttf'):
"""
Search the font dictionary for a font that exactly or closely
matches the specified font properties. See the FontProperties class
for a description.
The properties are searched in the following order: name, style,
variant, weight, stretch, and size. The font weight always matches
returning the closest weight, and the font size always matches for
scalable fonts. An oblique style font will be used inplace of a
missing italic style font if present. See the W3C Cascading Style
Sheet, Level 1 (CSS1; http://www.w3.org/TR/1998/REC-CSS2-19980512/)
documentation for a description of the font finding algorithm.
"""
debug = False
if is_string_like(prop):
prop = FontProperties(prop)
fname = prop.get_file()
if fname is not None:
verbose.report('findfont returning %s'%fname, 'debug')
return fname
if fontext == 'afm':
fontdict = self.afmdict
else:
fontdict = self.ttfdict
original_name = prop.get_family()[0]
style = prop.get_style()
variant = prop.get_variant()
weight = weight_as_number(prop.get_weight())
stretch = prop.get_stretch()
size = str(prop.get_size_in_points())
def lookup_name(name):
try:
fname = fontdict[name][style][variant][weight][stretch][size]
verbose.report('\tfindfont cached %(name)s, %(style)s, %(variant)s, %(weight)s, %(stretch)s, %(size)s'%locals(), 'debug')
verbose.report('findfont returning %s'%fname, 'debug')
return fname
except KeyError:
pass
fname = None
font = fontdict
if font.has_key(name):
font = font[name]
else:
verbose.report('\tfindfont failed %(name)s'%locals(), 'debug')
return None
if font.has_key(style):
font = font[style]
elif style == 'italic' and font.has_key('oblique'):
font = font['oblique']
elif style == 'oblique' and font.has_key('italic'):
font = font['italic']
else:
verbose.report('\tfindfont failed %(name)s, %(style)s'%locals(), 'debug')
return None
if font.has_key(variant):
font = font[variant]
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