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Merge pull request #256 from anthrotype/os2_char_index

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[OS/2] update fsFirstCharIndex and fsLastCharIndex upon compile
This commit is contained in:
Behdad Esfahbod 2015-05-09 11:12:47 -07:00
commit ca451d8c74
1 changed files with 17 additions and 0 deletions
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17
Lib/fontTools/ttLib/tables/O_S_2f_2.py
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@ -121,6 +121,7 @@ class table_O_S_2f_2(DefaultTable.DefaultTable):
self.panose = sstruct.unpack(panoseFormat, self.panose, Panose())
def compile(self, ttFont):
self.updateFirstAndLastCharIndex(ttFont)
panose = self.panose
self.panose = sstruct.pack(panoseFormat, self.panose)
if self.version == 0:
@ -141,6 +142,10 @@ class table_O_S_2f_2(DefaultTable.DefaultTable):
return data
def toXML(self, writer, ttFont):
writer.comment(
"The fields 'fsFirstCharIndex' and 'fsLastCharIndex'\n"
"will be recalculated by the compiler")
writer.newline()
if self.version == 1:
format = OS2_format_1
elif self.version in (2, 3, 4):
@ -185,3 +190,15 @@ class table_O_S_2f_2(DefaultTable.DefaultTable):
setattr(self, name, safeEval("'''" + attrs["value"] + "'''"))
else:
setattr(self, name, safeEval(attrs["value"]))
def updateFirstAndLastCharIndex(self, ttFont):
codes = set()
for table in ttFont['cmap'].tables:
if table.isUnicode():
codes.update(table.cmap.keys())
if codes:
minCode = min(codes)
maxCode = max(codes)
# USHORT cannot hold codepoints greater than 0xFFFF
self.fsFirstCharIndex = 0xFFFF if minCode > 0xFFFF else minCode
self.fsLastCharIndex = 0xFFFF if maxCode > 0xFFFF else maxCode