def update_nametable(ttfont):
"""
- Add nameID 25
- Update fvar instance names and add fvar instance postscript names
"""
is_italic = font_is_italic(ttfont)
has_mac_names = font_has_mac_names(ttfont)
# Add nameID 25
# https://docs.microsoft.com/en-us/typography/opentype/spec/name#name-ids
vf_ps_name = _add_nameid_25(ttfont, is_italic, has_mac_names)
# Update fvar instances
instances = ttfont["fvar"].instances
for inst in instances:
wght_val = inst.coordinates["wght"]
if wght_val not in WGHT:
raise ValueError(f"Unsupported wght coord '{wght_val}'. Coord "
"needs to be in {WGHT.keys()}")
# Update instance subfamilyNameID
wght_name = WGHT[wght_val]
inst_name = wght_name
if is_italic:
inst_name = f"{inst_name} Italic"
inst_name = inst_name.replace("Regular Italic", "Italic")
ttfont['name'].setName(inst_name, inst.subfamilyNameID, 3, 1, 0x409)
if has_mac_names:
ttfont['name'].setName(inst_name, inst.subfamilyNameID, 1, 0, 0)
# Add instance psName
ps_name = f"{vf_ps_name}-{wght_name}"
ps_name_id = ttfont['name'].addName(ps_name)
inst.postscriptNameID = ps_name_id
def gen_stat(self, varfonts):
if "axisOrder" not in self.config:
self.config["axisOrder"] = [
ax.axisTag for ax in varfonts[0]["fvar"].axes
]
if len(varfonts) > 1 and "ital" not in self.config["axisOrder"]:
# *Are* any italic? Presumably, but test
if any(font_is_italic(f) for f in varfonts):
self.config["axisOrder"].append("ital")
locations = self.config.get("statFormat4", None)
if locations and 'stat' not in self.config:
raise ValueError(
"Cannot add statFormat 4 axisValues since no stat table has been declared."
)
if "stylespaceFile" in self.config and self.config["stylespaceFile"]:
self.gen_stat_stylespace(self.config["stylespaceFile"], varfonts)
elif "stat" in self.config:
gen_stat_tables_from_config(self.config["stat"],
varfonts,
locations=locations)
else:
gen_stat_tables(varfonts, self.config["axisOrder"])
for ttFont in varfonts:
ttFont.save(ttFont.reader.file.name)
def css_font_faces(ttFonts, server_dir=None, position=None):
"""Generate @font-face CSSElements for a collection of fonts
Args:
ttFonts: a list containing ttFont instances
server_dir: optional. A path to the root directory of the server.
@font-face src urls are relative to the server's root dir.
position: optional. Adds a suffix to the font-family name
Returns:
A list of @font-face CSSElements
"""
results = []
for ttFont in ttFonts:
family_name = font_familyname(ttFont)
style_name = font_stylename(ttFont)
font_path = ttFont.reader.file.name
path = (font_path if not server_dir else os.path.relpath(
font_path, start=server_dir))
src = f"url({path})"
font_family = _class_name(family_name, style_name, position)
font_style = "italic" if font_is_italic(ttFont) else "normal"
font_weight = css_font_weight(ttFont)
font_stretch = WIDTH_CLASS_TO_CSS[ttFont["OS/2"].usWidthClass]
if "fvar" in ttFont:
fvar = ttFont["fvar"]
axes = {a.axisTag: a for a in fvar.axes}
if "wght" in axes:
min_weight = int(axes["wght"].minValue)
max_weight = int(axes["wght"].maxValue)
font_weight = f"{min_weight} {max_weight}"
if "wdth" in axes:
min_width = int(axes["wdth"].minValue)
max_width = int(axes["wdth"].maxValue)
font_stretch = f"{min_width}% {max_width}%"
if "ital" in axes:
pass
if "slnt" in axes:
min_angle = int(axes["slnt"].minValue)
max_angle = int(axes["slnt"].maxValue)
font_style = f"oblique {min_angle}deg {max_angle}deg"
font_face = CSSElement(
"@font-face",
src=src,
font_family=font_family,
font_weight=font_weight,
font_stretch=font_stretch,
font_style=font_style,
)
results.append(font_face)
return results
def gen_stat(self, varfonts):
if len(varfonts) > 1 and "ital" not in self.config["axisOrder"]:
# *Are* any italic? Presumably, but test
if any(font_is_italic(f) for f in varfonts):
self.config["axisOrder"].append("ital")
if "stylespaceFile" in self.config and self.config["stylespaceFile"]:
self.gen_stat_stylespace(self.config["stylespaceFile"], varfonts)
elif "stat" in self.config:
gen_stat_tables_from_config(self.config["stat"], varfonts)
else:
gen_stat_tables(varfonts, self.config["axisOrder"])
for ttFont in varfonts:
ttFont.save(ttFont.reader.file.name)
def gen_stat_stylespace(self, stylespaceFile, varfonts):
import warnings
warnings.warn(
".stylespace files are supported for compatibility but"
"you are encouraged to specify your STAT table axes in the config file"
)
stylespace = statmake.classes.Stylespace.from_file(stylespaceFile)
for ttFont in varfonts:
if "ital" in self.config["axisOrder"]:
if font_is_italic(ttFont):
additional_locations = {"Italic": 1}
else:
additional_locations = {"Italic": 0}
else:
additional_locations = {}
statmake.lib.apply_stylespace_to_variable_font(
stylespace, ttFont, additional_locations)
def css_font_class_from_static(ttFont, position=None):
family_name = font_familyname(ttFont)
style_name = font_stylename(ttFont)
class_name = _class_name(family_name, style_name, position)
font_family = class_name
font_weight = css_font_weight(ttFont)
font_style = "italic" if font_is_italic(ttFont) else "normal"
font_stretch = WIDTH_CLASS_TO_CSS[ttFont["OS/2"].usWidthClass]
return CSSElement(
class_name,
_full_name=f"{family_name} {style_name}",
_style=style_name,
_font_path=ttFont.reader.file.name,
font_family=font_family,
font_weight=font_weight,
font_style=font_style,
font_stretch=font_stretch,
)
def gen_stat_tables_from_config(stat, varfonts, has_italic=None):
"""
Generate a stat table for each font in a family from a Python configuration.
Args:
stat: either a dictionary or list as described below
varfonts: a list of variable TTFont instances
has_italic: a boolean indicating whether the family contains an italic.
If not provided, the stylename of the font files are inspected to
determine if any of them contain the word ``Italic``.
The ``stat`` parameter should normally be a list of axis dictionaries in the
format used by ``buildStatTable``. This list should *not* contain an entry
for the ``ital`` axis, as this entry will be generated as appropriate for
each font if ``has_italic`` is True.
For example::
varfonts = [
"Source-Regular-VF[wdth].ttf",
"Source-Italic-VF[wdth].ttf"
]
stat = [
{ "tag":"wdth", "name": "Width", "values": [ ... ] }
]
Alternately, to allow different STAT table entries for each font, the ``stat``
parameter may be a dictionary, whose keys are source IDs (usually source
filenames) corresponding to the appropriate entry in the ``varfonts``
dictionary and whose values are the list of axis dictionaries for the font.
Note that in this case, the axes list is passed to ``buildStatTable`` with
no further manipulation, meaning that if you want an ``ital`` axis, you
should specify it manually as part of the dictionary.
For example::
stat = {
"Font[wght].ttf": [
{ "tag":"wdth", "name": "Width", "values": [ ... ] },
{ "tag":"ital", "name": "Italic", "values": [ ... ] }
],
"Font-Italic[wght].ttf": [
{ "tag":"wdth", "name": "Width", "values": [ ... ] },
{ "tag":"ital", "name": "Italic", "values": [ ... ] }
]
}
"""
assert all("fvar" in f for f in varfonts)
# Check we have no italic
if isinstance(stat, list):
if has_italic is None:
has_italic = any(font_is_italic(f) for f in varfonts)
if has_italic:
for ax in stat:
if ax["name"] == "ital":
raise ValueError("ital axis should not appear in stat config")
ital_stat_for_roman = {
"name": "Italic", "tag": "ital",
"values": [dict(value=0, name="Roman", flags=0x2, linkedValue=1)]
}
ital_stat_for_italic = {
"name": "Italic", "tag": "ital",
"values": [dict(value=1, name="Italic")]
}
stat.append({}) # We will switch this entry between Roman and Italic
for ttFont in varfonts:
filename = os.path.basename(ttFont.reader.file.name)
if isinstance(stat, dict):
if filename not in stat:
raise ValueError("Filename %s not found in stat dictionary" % filename)
this_stat = stat[filename]
else:
if has_italic:
if font_is_italic(ttFont):
stat[-1] = ital_stat_for_italic
else:
stat[-1] = ital_stat_for_roman
this_stat = stat
buildStatTable(ttFont, this_stat)
