def build_font(srcs, metadata, filename):
ascent = 880
descent = 120
upem = ascent + descent
scale = upem / 360.0
transform = Transform(scale, 0, 0, -scale, 0, ascent)
glyphs = collect_glyphs(srcs, transform=transform)
builder = FontBuilder(1000, isTTF=False)
builder.setupGlyphOrder([glyph.name for glyph in glyphs])
builder.setupCharacterMap({0: ".notdef"})
psname = metadata["psName"]
builder.setupCFF(psname, {"FullName": psname},
{glyph.name: glyph.charstring
for glyph in glyphs}, {})
builder.setupHorizontalMetrics(
{glyph.name: glyph.get_hmetrics()
for glyph in glyphs})
builder.setupHorizontalHeader(ascent=ascent, descent=-descent)
builder.setupNameTable({})
builder.setupOS2()
builder.setupPost()
builder.setupVerticalMetrics(
{glyph.name: glyph.get_vmetrics(ascent=ascent)
for glyph in glyphs})
builder.setupVerticalOrigins({}, ascent)
builder.setupVerticalHeader(ascent=ascent, descent=-descent)
builder.save(filename)
def make_font(file_paths, out_dir, revision, gsub_path, gpos_path, uvs_lst):
cmap, gorder, validated_fpaths = {}, deque(), []
# build glyph order
for fpath in file_paths:
# derive glyph name from file name
gname = os.path.splitext(os.path.basename(fpath))[0] # trim extension
# validate glyph name
if not glyph_name_is_valid(gname, fpath):
continue
# skip any duplicates and 'space'
if gname in gorder or gname == 'space':
log.warning("Skipped file '{}'. The glyph name derived from it "
"is either a duplicate or 'space'.".format(fpath))
continue
# limit the length of glyph name to 31 chars
if len(gname) > 31:
num = 0
trimmed_gname = get_trimmed_glyph_name(gname, num)
while trimmed_gname in gorder:
num += 1
trimmed_gname = get_trimmed_glyph_name(trimmed_gname, num)
gorder.append(trimmed_gname)
log.warning("Glyph name '{}' was trimmed to 31 characters: "
"'{}'".format(gname, trimmed_gname))
else:
gorder.append(gname)
validated_fpaths.append(fpath)
# add to cmap
if RE_UNICODE.match(gname):
uni_int = int(gname[1:], 16) # trim leading 'u'
cmap[uni_int] = gname
fb = FontBuilder(UPM, isTTF=False)
fb.font['head'].fontRevision = float(revision)
fb.font['head'].lowestRecPPEM = 12
cs_dict = {}
cs_cache = {}
for i, svg_file_path in enumerate(validated_fpaths):
svg_file_realpath = os.path.realpath(svg_file_path)
if svg_file_realpath not in cs_cache:
svg_size = get_svg_size(svg_file_realpath)
if svg_size is None:
cs_dict[gorder[i]] = SPACE_CHARSTRING
continue
pen = T2CharStringPen(EMOJI_H_ADV, None)
svg = SVGPath(svg_file_realpath,
transform=(EMOJI_SIZE / svg_size, 0, 0,
-EMOJI_SIZE / svg_size,
(EMOJI_H_ADV * .5) - (EMOJI_SIZE * .5),
EMOJI_H_ADV * ABOVE_BASELINE))
svg.draw(pen)
cs = pen.getCharString()
cs_cache[svg_file_realpath] = cs
else:
cs = cs_cache.get(svg_file_realpath)
cs_dict[gorder[i]] = cs
# add '.notdef', 'space' and zero-width joiner
pen = T2CharStringPen(EMOJI_H_ADV, None)
draw_notdef(pen)
gorder.extendleft(reversed(['.notdef', 'space', 'ZWJ']))
cs_dict.update({
'.notdef': pen.getCharString(),
'space': SPACE_CHARSTRING,
'ZWJ': SPACE_CHARSTRING,
})
cmap.update({
32: 'space', # U+0020
160: 'space', # U+00A0
8205: 'ZWJ', # U+200D
})
# add TAG LATIN LETTER glyphs and mappings
for cdpt in TAG_LAT_LETTR:
tag_gname = f'u{cdpt}'
gorder.append(tag_gname)
cs_dict[tag_gname] = SPACE_CHARSTRING
cmap[int(cdpt, 16)] = tag_gname
fb.setupGlyphOrder(list(gorder)) # parts of FontTools require a list
fb.setupCharacterMap(cmap, uvs=uvs_lst)
fb.setupCFF(
PS_NAME, {
'version': revision,
'Notice': TRADEMARK,
'Copyright': COPYRIGHT,
'FullName': FULL_NAME,
'FamilyName': FAMILY_NAME,
'Weight': STYLE_NAME
}, cs_dict, {})
glyphs_bearings = {}
for gname, cs in cs_dict.items():
gbbox = cs.calcBounds(None)
if gbbox:
xmin, ymin, _, ymax = gbbox
if ymax > ASCENT:
log.warning("Top of glyph '{}' may get clipped. "
"Glyph's ymax={}; Font's ascent={}".format(
gname, ymax, ASCENT))
if ymin < DESCENT:
log.warning("Bottom of glyph '{}' may get clipped. "
"Glyph's ymin={}; Font's descent={}".format(
gname, ymin, DESCENT))
lsb = xmin
tsb = EMOJI_V_ADV - ymax - EMOJI_H_ADV * (1 - ABOVE_BASELINE)
glyphs_bearings[gname] = (lsb, tsb)
else:
glyphs_bearings[gname] = (0, 0)
h_metrics = {}
v_metrics = {}
for gname in gorder:
h_metrics[gname] = (EMOJI_H_ADV, glyphs_bearings[gname][0])
v_metrics[gname] = (EMOJI_V_ADV, glyphs_bearings[gname][1])
fb.setupHorizontalMetrics(h_metrics)
fb.setupVerticalMetrics(v_metrics)
fb.setupHorizontalHeader(ascent=ASCENT, descent=DESCENT)
v_ascent = EMOJI_H_ADV // 2
v_descent = EMOJI_H_ADV - v_ascent
fb.setupVerticalHeader(ascent=v_ascent,
descent=-v_descent,
caretSlopeRun=1)
VERSION_STRING = 'Version {};{}'.format(revision, VENDOR)
UNIQUE_ID = '{};{};{}'.format(revision, VENDOR, PS_NAME)
name_strings = dict(
copyright=COPYRIGHT, # ID 0
familyName=FAMILY_NAME, # ID 1
styleName=STYLE_NAME, # ID 2
uniqueFontIdentifier=UNIQUE_ID, # ID 3
fullName=FULL_NAME, # ID 4
version=VERSION_STRING, # ID 5
psName=PS_NAME, # ID 6
trademark=TRADEMARK, # ID 7
manufacturer=MANUFACTURER, # ID 8
designer=DESIGNER, # ID 9
vendorURL=VENDOR_URL, # ID 11
designerURL=DESIGNER_URL, # ID 12
licenseDescription=LICENSE, # ID 13
licenseInfoURL=LICENSE_URL, # ID 14
)
fb.setupNameTable(name_strings, mac=False)
fb.setupOS2(
fsType=FSTYPE,
achVendID=VENDOR,
fsSelection=0x0040, # REGULAR
usWinAscent=ASCENT,
usWinDescent=-DESCENT,
sTypoAscender=ASCENT,
sTypoDescender=DESCENT,
sCapHeight=ASCENT,
ulCodePageRange1=(1 << 1)) # set 1st CP bit
if gsub_path:
addOpenTypeFeatures(fb.font, gsub_path, tables=['GSUB'])
if gpos_path:
addOpenTypeFeatures(fb.font, gpos_path, tables=['GPOS'])
fb.setupPost(isFixedPitch=1,
underlinePosition=UNDERLINE_POSITION,
underlineThickness=UNDERLINE_THICKNESS)
fb.setupDummyDSIG()
fb.save(os.path.join(out_dir, '{}.otf'.format(PS_NAME)))