def buildCompatChars(sfd, ttf):
zwj = u'\u200D'
ranges = (
(0xfb50, 0xfbb1),
(0xfbd3, 0xfd3d),
(0xfd50, 0xfdf9),
(0xfdfc, 0xfdfc),
(0xfe70, 0xfefc),
)
with open(ttf, "rb") as f:
data = f.read()
blob = HarfBuzz.glib_blob_create(GLib.Bytes.new(data))
face = HarfBuzz.face_create(blob, 0)
hbfont = HarfBuzz.font_create(face)
upem = HarfBuzz.face_get_upem(face)
HarfBuzz.font_set_scale(hbfont, upem, upem)
HarfBuzz.ot_font_set_funcs(hbfont)
ttfont = TTFont(ttf)
for r in ranges:
for c in range(r[0], r[1] + 1):
dec = ucd.decomposition(unichr(c)).split()
if dec:
keyword = dec[0]
text = u''
for i in dec[1:]:
text += unichr(int(str(i), 16))
if keyword == '<initial>':
text = text + zwj
elif keyword == '<final>':
text = zwj + text
elif keyword == '<medial>':
text = zwj + text + zwj
components = shape(text, hbfont)
if components:
glyph = sfd.createChar(c)
glyph.clear()
glyph.color = 0xff0000 # red color
x = 0
for component in components:
gid = component[0]
name = ttfont.getGlyphName(gid)
x_advance = component[1]
x_offset = component[2]
y_offset = component[3]
matrix = psMat.translate(x + x_offset, y_offset)
# ignore blank glyphs, e.g. space or ZWJ
if sfd[name].foreground or sfd[name].references:
glyph.addReference(name, matrix)
x += x_advance
glyph.width = x
def setup_harfbuzz() -> Tuple[HarfBuzz.font_t, HarfBuzz.buffer_t]:
"""
Finds a font for HarfBuzz to use, and creates a buffer
Because this is wrapped with functools.lru_cache, the buffer returned
may have text still in it, which means
gi.repository.HarfBuzz.buffer_clear_contents()
will need to be called on the buffer to return it to its empty state
"""
font_file = get_font_file()
font_blob = HarfBuzz.glib_blob_create(
GLib.Bytes.new(font_file.read_bytes()))
face = HarfBuzz.face_create(font_blob, 0)
del font_blob
font = HarfBuzz.font_create(face)
upem = HarfBuzz.face_get_upem(face)
del face
HarfBuzz.font_set_scale(font, 100, 100)
HarfBuzz.ot_font_set_funcs(font)
buffer = HarfBuzz.buffer_create()
# HarfBuzz.buffer_set_message_func(
# buffer,
# lambda *args: True,
# 1,
# 0,
# )
return (font, upem, buffer)
def buildCompatChars(sfd, ttf):
zwj = u'\u200D'
ranges = (
(0xfb50, 0xfbb1),
(0xfbd3, 0xfd3d),
(0xfd50, 0xfdf9),
(0xfdfc, 0xfdfc),
(0xfe70, 0xfefc),
)
with open(ttf, "rb") as f:
data = f.read()
blob = HarfBuzz.glib_blob_create(GLib.Bytes.new(data))
face = HarfBuzz.face_create(blob, 0)
hbfont = HarfBuzz.font_create(face)
upem = HarfBuzz.face_get_upem(face)
HarfBuzz.font_set_scale(hbfont, upem, upem)
HarfBuzz.ot_font_set_funcs(hbfont)
ttfont = TTFont(ttf)
for r in ranges:
for c in range(r[0], r[1]+1):
dec = ucd.decomposition(unichr(c)).split()
if dec:
keyword = dec[0]
text = u''
for i in dec[1:]:
text += unichr(int(str(i),16))
if keyword == '<initial>':
text = text + zwj
elif keyword == '<final>':
text = zwj + text
elif keyword == '<medial>':
text = zwj + text + zwj
components = shape(text, hbfont)
if components:
glyph = sfd.createChar(c)
glyph.clear()
glyph.color = 0xff0000 # red color
x = 0
for component in components:
gid = component[0]
name = ttfont.getGlyphName(gid)
x_advance = component[1]
x_offset = component[2]
y_offset = component[3]
matrix = psMat.translate(x + x_offset, y_offset)
# ignore blank glyphs, e.g. space or ZWJ
if sfd[name].foreground or sfd[name].references:
glyph.addReference(name, matrix)
x += x_advance
glyph.width = x
def getHbFont(fontname):
font = open(fontname, "rb")
data = font.read()
font.close()
blob = HarfBuzz.glib_blob_create(GLib.Bytes.new(data))
face = HarfBuzz.face_create(blob, 0)
font = HarfBuzz.font_create(face)
upem = HarfBuzz.face_get_upem(face)
HarfBuzz.font_set_scale(font, upem, upem)
HarfBuzz.ot_font_set_funcs(font)
return font
def getHbFont(fontname):
font = open(fontname, "rb")
data = font.read()
font.close()
blob = HarfBuzz.glib_blob_create(GLib.Bytes.new(data))
face = HarfBuzz.face_create(blob, 0)
font = HarfBuzz.font_create(face)
upem = HarfBuzz.face_get_upem(face)
HarfBuzz.font_set_scale(font, upem, upem)
HarfBuzz.ot_font_set_funcs(font)
return font
def get_text_shape(text, font=None, weight=None, path=None, debug=False):
if weight is not None:
font = f'{font}:{weight}'
if path is None:
path = get_font_path(font)
base, ext = os.path.splitext(path)
ext = ext[1:]
with open(path, 'rb') as fid:
fontdata = fid.read()
bdata = GLib.Bytes.new(fontdata)
blob = hb.glib_blob_create(bdata)
face = hb.face_create(blob, 0)
font = hb.font_create(face)
upem = hb.face_get_upem(face)
hb.font_set_scale(font, upem, upem)
# hb.font_set_ptem(font, font_size)
if ext == 'woff':
hb.ft_font_set_funcs(font)
buf = hb.buffer_create()
hb.buffer_add_utf8(buf, text.encode('utf-8'), 0, -1)
hb.buffer_guess_segment_properties(buf)
hb.shape(font, buf, [])
infos = hb.buffer_get_glyph_infos(buf)
positions = hb.buffer_get_glyph_positions(buf)
extents = [hb.font_get_glyph_extents(font, i.codepoint) for i in infos]
if debug:
return font, infos, positions, extents
norm = upem
wh_extract = lambda ext: (ext.extents.width / norm, -ext.extents.height /
norm)
cluster = [(i.codepoint, i.cluster) for i in infos]
shapes = [wh_extract(e) for e in extents]
deltas = [(p.x_advance / norm, p.y_advance / norm) for p in positions]
offsets = [(p.x_offset / norm, p.y_offset / norm) for p in positions]
return cluster, shapes, deltas, offsets
def main():
font_file = barcode_wheel.get_font_file()
font_blob = HarfBuzz.glib_blob_create(GLib.Bytes.new(font_file.read_bytes()))
face = HarfBuzz.face_create(font_blob, 0)
del font_blob
font = HarfBuzz.font_create(face)
upem = HarfBuzz.face_get_upem(face)
del face
HarfBuzz.font_set_scale(font, upem, upem)
text = sys.argv[1]
HarfBuzz.ot_font_set_funcs(font)
buf = HarfBuzz.buffer_create()
HarfBuzz.buffer_set_message_func(
buf,
# lambda *args: [print(x) for x in args] and True,
lambda *args: True,
1,
0,
)
if False:
HarfBuzz.buffer_add_utf8(buf, text.encode("utf-8"), 0, -1)
elif sys.maxunicode == 0x10FFFF:
HarfBuzz.buffer_add_utf32(
buf, array.array("I", text.encode("utf-32"))[1:], 0, -1
)
else:
HarfBuzz.buffer_add_utf16(
buf, array.array("H", text.encode("utf-16"))[1:], 0, -1
)
HarfBuzz.buffer_guess_segment_properties(buf)
HarfBuzz.shape(font, buf, [])
del font
infos = HarfBuzz.buffer_get_glyph_infos(buf)
positions = HarfBuzz.buffer_get_glyph_positions(buf)
for info, pos in zip(infos, positions):
gid = info.codepoint
cluster = info.cluster
print(f"gid {gid} = {cluster} @ {pos.x_advance}, {pos.x_offset}+{pos.y_offset}")
def __init__(self, font_path):
try:
assert os.path.isfile(font_path)
font_file = open(font_path, "br")
fontdata = font_file.read()
blob = hb.glib_blob_create(GLib.Bytes.new(fontdata))
del fontdata
face = hb.face_create(blob, 0)
del blob
self.__font = hb.font_create(face)
upem = hb.face_get_upem(face)
del face
font_file.close()
hb.font_set_scale(self.__font, upem, upem)
#hb.ft_font_set_funcs (font)
hb.ot_font_set_funcs(self.__font)
except Exception:
print(font_path)
except NameError:
unicode = str
def tounicode(s, encoding='utf-8'):
if not isinstance(s, unicode):
return s.decode(encoding)
else:
return s
fontdata = open(sys.argv[1], 'rb').read()
text = tounicode(sys.argv[2])
# Need to create GLib.Bytes explicitly until this bug is fixed:
# https://bugzilla.gnome.org/show_bug.cgi?id=729541
blob = hb.glib_blob_create(GLib.Bytes.new(fontdata))
face = hb.face_create(blob, 0)
del blob
font = hb.font_create(face)
upem = hb.face_get_upem(face)
del face
hb.font_set_scale(font, upem, upem)
#hb.ft_font_set_funcs (font)
hb.ot_font_set_funcs(font)
buf = hb.buffer_create()
class Debugger(object):
def message(self, buf, font, msg, data, _x_what_is_this):
print(msg)
try: unicode except NameError: unicode = str def tounicode(s, encoding='utf-8'): if not isinstance(s, unicode): return s.decode(encoding) else: return s fontdata = open (sys.argv[1], 'rb').read () text = tounicode(sys.argv[2]) # Need to create GLib.Bytes explicitly until this bug is fixed: # https://bugzilla.gnome.org/show_bug.cgi?id=729541 blob = hb.glib_blob_create (GLib.Bytes.new (fontdata)) face = hb.face_create (blob, 0) del blob font = hb.font_create (face) upem = hb.face_get_upem (face) del face hb.font_set_scale (font, upem, upem) #hb.ft_font_set_funcs (font) hb.ot_font_set_funcs (font) buf = hb.buffer_create () class Debugger(object): def message (self, buf, font, msg, data, _x_what_is_this): print(msg) return True debugger = Debugger()
def _hb_face_from_path(filepath):
with open(filepath, 'rb') as fi:
fontdata = fi.read()
return hb.face_create(hb.glib_blob_create(Bytes.new(fontdata)), 0)
def _hb_face_from_path(filepath):
with open(filepath, 'rb') as fi:
fontdata = fi.read()
return hb.face_create(hb.glib_blob_create(Bytes.new(fontdata)), 0)
