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Cleanup; GSUB/GPOS mostly done

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The remaining formats are not in wide use apparently!  Will implement
when I encounter them.
This commit is contained in:
Behdad Esfahbod 2013-07-21 18:40:59 -04:00
parent 5466061234
commit 02b9206ad2
1 changed files with 59 additions and 47 deletions
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106
pyotlss.py
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@ -4,30 +4,15 @@
# Writte by: Behdad Esfahbod
import fontTools.ttx
import sys
import types
if len (sys.argv) < 3:
print >>sys.stderr, "usage: pyotlss.py font-file glyph..."
sys.exit (1)
fontfile = sys.argv[1]
glyphs = sys.argv[2:]
font = fontTools.ttx.TTFont (fontfile)
names = font.getGlyphNames()
# Convert to glyph names
glyphs = [g if g in names else font.getGlyphName(int(g)) for g in glyphs]
def add_method (clazz):
def add_method (*clazzes):
def wrapper(method):
setattr (clazz, method.func_name, method)
for clazz in clazzes:
setattr (clazz, method.func_name, method)
return wrapper
#
# Subset
#
@add_method(fontTools.ttLib.tables.otTables.Coverage)
def subset (self, glyphs):
@ -68,21 +53,6 @@ def subset (self, glyphs):
for g,seqs in self.ligatures.items()}
self.ligatures = {g:v for g,v in self.ligatures.items() if v}
@add_method(fontTools.ttLib.tables.otTables.ContextSubst)
def subset (self, glyphs):
pass # XXX
@add_method(fontTools.ttLib.tables.otTables.ChainContextSubst)
def subset (self, glyphs):
pass # XXX
@add_method(fontTools.ttLib.tables.otTables.ExtensionSubst)
def subset (self, glyphs):
if self.Format == 1:
self.ExtSubTable.subset (glyphs)
else:
assert 0, "unknown format: %s" % self.Format
@add_method(fontTools.ttLib.tables.otTables.ReverseChainSingleSubst)
def subset (self, glyphs):
if self.Format == 1:
@ -172,28 +142,70 @@ def subset (self, glyphs):
else:
assert 0, "unknown format: %s" % self.Format
@add_method(fontTools.ttLib.tables.otTables.ContextPos)
@add_method(fontTools.ttLib.tables.otTables.ContextSubst, fontTools.ttLib.tables.otTables.ContextPos)
def subset (self, glyphs):
pass # XXX
if self.Format == 1:
assert 0 # XXX
elif self.Format == 2:
assert 0 # XXX
elif self.Format == 3:
assert 0 # XXX
else:
assert 0, "unknown format: %s" % self.Format
@add_method(fontTools.ttLib.tables.otTables.ChainContextPos)
@add_method(fontTools.ttLib.tables.otTables.ChainContextSubst, fontTools.ttLib.tables.otTables.ChainContextPos)
def subset (self, glyphs):
pass # XXX
if self.Format == 1:
assert 0 # XXX
elif self.Format == 2:
assert 0 # XXX
elif self.Format == 3:
for c in self.InputCoverage:
c.subset (glyphs)
for c in self.LookAheadCoverage:
c.subset (glyphs)
for c in self.BacktrackCoverage:
c.subset (glyphs)
else:
assert 0, "unknown format: %s" % self.Format
@add_method(fontTools.ttLib.tables.otTables.ExtensionPos)
@add_method(fontTools.ttLib.tables.otTables.ExtensionSubst, fontTools.ttLib.tables.otTables.ExtensionPos)
def subset (self, glyphs):
if self.Format == 1:
self.ExtSubTable.subset (glyphs)
else:
assert 0, "unknown format: %s" % self.Format
for Gtag in ['GSUB', 'GPOS']:
if Gtag not in font:
continue
G = font[Gtag]
for lookup in G.table.LookupList.Lookup:
for subtable in lookup.SubTable:
print subtable
subtable.subset (glyphs)
@add_method(fontTools.ttLib.tables.otTables.Lookup)
def subset (self, glyphs):
for subtable in self.SubTable:
subtable.subset (glyphs)
#font['GSUB'].toXML(sys.stdout, font)
@add_method(fontTools.ttLib.tables.otTables.GSUB, fontTools.ttLib.tables.otTables.GPOS)
def subset (self, glyphs):
for lookup in self.LookupList.Lookup:
lookup.subset (glyphs)
if __name__ == '__main__':
import sys
if len (sys.argv) < 3:
print >>sys.stderr, "usage: pyotlss.py font-file glyph..."
sys.exit (1)
fontfile = sys.argv[1]
glyphs = sys.argv[2:]
font = fontTools.ttx.TTFont (fontfile)
names = font.getGlyphNames()
# Convert to glyph names
glyphs = [g if g in names else font.getGlyphName(int(g)) for g in glyphs]
for Gtag in ['GSUB', 'GPOS']:
if Gtag not in font:
continue
font[Gtag].table.subset (glyphs)
# XXX GDEF