1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
# Port of glyphtools.categorize_glyph, isolated here to reduce
# dependencies.
def categorize_glyph(font, glyphname):
"""Return the category of the given glyph.
Args:
font: a ``fontTools`` TTFont object OR a ``glyphsLib`` GSFontMaster
object OR a ``babelfont`` Font object.
glyphname: name of the glyph.
Returns:
A two-element tuple. The first element is one of the following
strings: ``unknown``, ``base``, ``mark``, ``ligature``, ``component``.
If the glyph is a mark, the second element is the mark attachment
class number.
"""
if hasattr(font, "userData"): # Glyphs
c = font.font.glyphs[glyphname].category
sc = font.font.glyphs[glyphname].subCategory
if sc == "Ligature":
return ("ligature", None)
if c == "Mark":
return ("mark", None)
return ("base", None)
if hasattr(font, "_set_kerning"): # Babelfont 1/2/3
if hasattr(font, "_master_map") or hasattr(font, "get_glyph_layer"):
return (font.glyphs[glyphname].category, None) # Babelfont 3
else:
return (font[glyphname].category, None) # Babelfont 1/2
# TT font
if "GDEF" not in font:
return ("unknown", None)
gdef = font["GDEF"].table
classdefs = gdef.GlyphClassDef.classDefs
if glyphname not in classdefs:
return ("unknown", None)
if classdefs[glyphname] == 1:
return ("base", None)
if classdefs[glyphname] == 2:
return ("ligature", None)
if classdefs[glyphname] == 3:
# Now find attachment class
mclass = None
if gdef.MarkAttachClassDef:
classdef = gdef.MarkAttachClassDef.classDefs
if glyphname in classdef:
mclass = classdef[glyphname]
return ("mark", mclass)
if classdefs[glyphname] == 4:
return ("component", None)
return ("unknown", None)
|
