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'post' format 4.0 support

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This commit is contained in:
Olivier Berten 2014-01-28 14:37:15 +01:00
parent 27c71f9f60
commit 4a73f8b4e9
1 changed files with 36 additions and 0 deletions
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36
Lib/fontTools/ttLib/tables/_p_o_s_t.py
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@ -37,6 +37,8 @@ class table__p_o_s_t(DefaultTable.DefaultTable):
self.decode_format_2_0(data, ttFont)
elif self.formatType == 3.0:
self.decode_format_3_0(data, ttFont)
elif self.formatType == 4.0:
self.decode_format_4_0(data, ttFont)
else:
# supported format
raise ttLib.TTLibError("'post' table format %f not supported" % self.formatType)
@ -49,6 +51,8 @@ class table__p_o_s_t(DefaultTable.DefaultTable):
data = data + self.encode_format_2_0(ttFont)
elif self.formatType == 3.0:
pass # we're done
elif self.formatType == 4.0:
data = data + self.encode_format_4_0(ttFont)
else:
# supported format
raise ttLib.TTLibError("'post' table format %f not supported" % self.formatType)
@ -122,6 +126,22 @@ class table__p_o_s_t(DefaultTable.DefaultTable):
# try and construct glyph names from a Unicode cmap table.
self.glyphOrder = None
def decode_format_4_0(self, data, ttFont):
from fontTools import agl
numGlyphs = ttFont['maxp'].numGlyphs
indices = struct.unpack(">"+str(int(len(data)/2))+"H", data)
# In some older fonts, the size of the post table doesn't match
# the number of glyphs. Sometimes it's bigger, sometimes smaller.
self.glyphOrder = glyphOrder = [''] * int(numGlyphs)
for i in range(min(len(indices),numGlyphs)):
if indices[i] == 0xFFFF:
self.glyphOrder[i] = ''
elif indices[i] in agl.UV2AGL:
self.glyphOrder[i] = agl.UV2AGL[indices[i]]
else:
self.glyphOrder[i] = "uni%04X" % indices[i]
self.build_psNameMapping(ttFont)
def encode_format_2_0(self, ttFont):
numGlyphs = ttFont['maxp'].numGlyphs
glyphOrder = ttFont.getGlyphOrder()
@ -150,6 +170,22 @@ class table__p_o_s_t(DefaultTable.DefaultTable):
indices.byteswap()
return struct.pack(">H", numGlyphs) + indices.tostring() + packPStrings(extraNames)
def encode_format_4_0(self, ttFont):
from fontTools import agl
numGlyphs = ttFont['maxp'].numGlyphs
glyphOrder = ttFont.getGlyphOrder()
assert len(glyphOrder) == numGlyphs
data = ''
for glyphID in glyphOrder:
glyphID = glyphID.split('#')[0]
if glyphID in agl.AGL2UV:
data += struct.pack(">H", agl.AGL2UV[glyphID])
elif len(glyphID) == 7 and glyphID[:3] == 'uni':
data += struct.pack(">H", int(glyphID[3:],16))
else:
data += struct.pack(">H", 0xFFFF)
return data
def toXML(self, writer, ttFont):
formatstring, names, fixes = sstruct.getformat(postFormat)
for name in names: