def pformat_tti(program, preserve=True):
from fontTools.ttLib.tables.ttProgram import _pushCountPat
assembly = program.getAssembly(preserve=preserve)
stream = StringIO()
i = 0
indent = 0
nInstr = len(assembly)
while i < nInstr:
instr = assembly[i]
if _unindentRE.match(instr):
indent -= 1
stream.write(' ' * indent)
stream.write(instr)
stream.write("\n")
m = _pushCountPat.match(instr)
i = i + 1
if m:
nValues = int(m.group(1))
line = []
j = 0
for j in range(nValues):
if j and not (j % 25):
stream.write(' '.join(line))
stream.write("\n")
line = []
line.append(assembly[i + j])
stream.write(' ' * indent)
stream.write(' '.join(line))
stream.write("\n")
i = i + j + 1
if _indentRE.match(instr):
indent += 1
return stream.getvalue()
class Font:
def __init__(self, filename, features, version):
self._font = fontforge.open(filename)
self._version = version
self._features = StringIO()
if features:
preprocessor = Preprocessor()
for d in ("italic", "sans", "display", "math"):
if d in filename.lower():
preprocessor.define(d.upper())
with open(features) as f:
preprocessor.parse(f)
preprocessor.write(self._features)
def _save_features(self, filename):
font = self._font
features = self._features
with NamedTemporaryFile(suffix=".fea", mode="rt") as temp:
font.generateFeatureFile(temp.name)
lines = temp.readlines()
for line in lines:
if not line.startswith("languagesystem"):
features.write(line)
for lookup in font.gpos_lookups + font.gsub_lookups:
font.removeLookup(lookup)
with open(filename, "wt") as f:
f.write(features.getvalue())
def _cleanup_glyphs(self):
font = self._font
for glyph in font.glyphs():
glyph.unlinkRef()
if glyph.unlinkRmOvrlpSave:
glyph.removeOverlap()
glyph.correctDirection()
def _update_metadata(self):
version = self._version
font = self._font
year = datetime.date.today().year
font.copyright = (u"Copyright © 2012-%s " % year +
u"The Libertinus Project Authors.")
font.version = version
# Override the default which includes the build date
font.appendSFNTName(
"English (US)", "UniqueID",
"%s;%s;%s" % (version, font.os2_vendor, font.fontname))
font.appendSFNTName("English (US)", "Vendor URL",
"https://github.com/alif-type/libertinus")
def _draw_over_under_line(self, name, widths):
font = self._font
bbox = font[name].boundingBox()
pos = bbox[1]
height = bbox[-1] - bbox[1]
for width in sorted(widths):
glyph = font.createChar(-1, "%s.%d" % (name, width))
glyph.width = 0
glyph.glyphclass = "mark"
pen = glyph.glyphPen()
pen.moveTo((-25 - width, pos))
pen.lineTo((-25 - width, pos + height))
pen.lineTo((25, pos + height))
pen.lineTo((25, pos))
pen.closePath()
def _make_over_under_line(self):
font = self._font
minwidth = 50
bases = [n for n in ("uni0305", "uni0332") if n in font]
if not bases:
return
# Collect glyphs grouped by their widths rounded by minwidth, we will
# use them to decide the widths of over/underline glyphs we will draw
widths = {}
for glyph in font.glyphs():
if glyph.glyphclass != 'mark' and glyph.width > 0:
width = round(glyph.width / minwidth) * minwidth
width = max(width, minwidth)
if width not in widths:
widths[width] = []
widths[width].append(glyph.glyphname)
for name in bases:
self._draw_over_under_line(name, widths)
dirname = os.path.dirname(font.path)
fea = []
fea.append("feature mark {")
fea.append(" @OverSet = [%s];" % " ".join(bases))
fea.append(" lookupflag UseMarkFilteringSet @OverSet;")
for width in sorted(widths):
# For each width group we create an over/underline glyph with the
# same width, and add a contextual substitution lookup to use it
# when an over/underline follows any glyph in this group
replacements = ['%s.%d' % (name, width) for name in bases]
fea.append(" sub [%s] [%s]' by [%s];" % (" ".join(
widths[width]), " ".join(bases), " ".join(replacements)))
fea.append("} mark;")
self._features.write("\n".join(fea))
def generate(self, output, output_features):
self._update_metadata()
self._cleanup_glyphs()
self._make_over_under_line()
self._save_features(output_features)
self._font.generate(output, flags=("opentype"))
def pformat_tti(program, preserve=True):
from fontTools.ttLib.tables.ttProgram import _pushCountPat
assembly = program.getAssembly(preserve=preserve)
stream = StringIO()
i = 0
indent = 0
nInstr = len(assembly)
while i < nInstr:
instr = assembly[i]
if _unindentRE.match(instr):
indent -= 1
stream.write(" " * indent)
stream.write(instr)
stream.write("\n")
m = _pushCountPat.match(instr)
i = i + 1
if m:
nValues = int(m.group(1))
line = []
j = 0
for j in range(nValues):
if j and not (j % 25):
stream.write(" ".join(line))
stream.write("\n")
line = []
line.append(assembly[i + j])
stream.write(" " * indent)
stream.write(" ".join(line))
stream.write("\n")
i = i + j + 1
if _indentRE.match(instr):
indent += 1
return stream.getvalue()
class Font:
def __init__(self, filename, features, version):
self._font = fontforge.open(filename)
self._version = version
self._features = StringIO()
if features:
preprocessor = Preprocessor()
for d in ("italic", "sans", "display", "math"):
if d in filename.lower():
preprocessor.define(d.upper())
with open(features) as f:
preprocessor.parse(f)
preprocessor.write(self._features)
def _merge_features(self):
with NamedTemporaryFile(suffix=".fea", mode="w") as temp:
temp.write(self._features.getvalue())
temp.flush()
self._font.mergeFeature(temp.name)
def _cleanup_glyphs(self):
font = self._font
for glyph in font.glyphs():
glyph.unlinkRef()
if glyph.unlinkRmOvrlpSave:
glyph.removeOverlap()
glyph.correctDirection()
glyph.autoHint()
def _update_metadata(self):
version = self._version
font = self._font
year = datetime.date.today().year
font.copyright = (u"Copyright © 2012-%s " % year +
u"The Libertinus Project Authors.")
font.version = version
# Override the default which includes the build date
font.appendSFNTName(
"English (US)", "UniqueID",
"%s;%s;%s" % (version, font.os2_vendor, font.fontname))
font.appendSFNTName("English (US)", "Vendor URL",
"https://github.com/alif-type/libertinus")
def _draw_over_under_line(self, name, widths):
font = self._font
bbox = font[name].boundingBox()
pos = bbox[1]
height = bbox[-1] - bbox[1]
for width in sorted(widths):
glyph = font.createChar(-1, "%s.%d" % (name, width))
glyph.width = 0
glyph.glyphclass = "mark"
pen = glyph.glyphPen()
pen.moveTo((-25 - width, pos))
pen.lineTo((-25 - width, pos + height))
pen.lineTo((25, pos + height))
pen.lineTo((25, pos))
pen.closePath()
def _make_over_under_line(self):
font = self._font
minwidth = 50
bases = [n for n in ("uni0305", "uni0332") if n in font]
if not bases:
return
# Collect glyphs grouped by their widths rounded by minwidth, we will
# use them to decide the widths of over/underline glyphs we will draw
widths = {}
for glyph in font.glyphs():
if glyph.glyphclass != 'mark' and glyph.width > 0:
width = round(glyph.width / minwidth) * minwidth
width = max(width, minwidth)
if width not in widths:
widths[width] = []
widths[width].append(glyph.glyphname)
for name in bases:
self._draw_over_under_line(name, widths)
dirname = os.path.dirname(font.path)
fea = []
fea.append("feature mark {")
fea.append(" @OverSet = [%s];" % " ".join(bases))
fea.append(" lookupflag UseMarkFilteringSet @OverSet;")
for width in sorted(widths):
# For each width group we create an over/underline glyph with the
# same width, and add a contextual substitution lookup to use it
# when an over/underline follows any glyph in this group
replacements = ['%s.%d' % (name, width) for name in bases]
fea.append(" sub [%s] [%s]' by [%s];" % (" ".join(
widths[width]), " ".join(bases), " ".join(replacements)))
fea.append("} mark;")
self._features.write("\n".join(fea))
def generate(self, output):
self._update_metadata()
self._cleanup_glyphs()
self._make_over_under_line()
self._merge_features()
self._font.generate(output, flags=("opentype"))
font = TTFont(output)
# https://github.com/fontforge/fontforge/pull/3235
# fontDirectionHint is deprecated and must be set to 2
font["head"].fontDirectionHint = 2
# unset bits 6..10
font["head"].flags &= ~0x7e0
options = subset.Options()
options.set(layout_features='*',
name_IDs='*',
notdef_outline=True,
glyph_names=True,
recalc_average_width=True,
drop_tables=["FFTM"])
unicodes = font["cmap"].getBestCmap().keys()
subsetter = subset.Subsetter(options=options)
subsetter.populate(unicodes=unicodes)
subsetter.subset(font)
font.save(output)
