ttx.py revision d7efd5692cac74702d487e641ca7ddf9c6cfecec 
1"""\
2usage: ttx [options] inputfile1 [... inputfileN]
3
4    TTX %s -- From OpenType To XML And Back
5
6    If an input file is a TrueType or OpenType font file, it will be
7       dumped to an TTX file (an XML-based text format).
8    If an input file is a TTX file, it will be compiled to a TrueType
9       or OpenType font file.
10
11    Output files are created so they are unique: an existing file is
12       never overwritten.
13
14    General options:
15    -h Help: print this message
16    -d <outputfolder> Specify a directory where the output files are
17       to be created.
18    -o <outputfile> Specify a file to write the output to.
19    -v Verbose: more messages will be written to stdout about what
20       is being done.
21    -q Quiet: No messages will be written to stdout about what
22       is being done.
23    -a allow virtual glyphs ID's on compile or decompile.
24
25    Dump options:
26    -l List table info: instead of dumping to a TTX file, list some
27       minimal info about each table.
28    -t <table> Specify a table to dump. Multiple -t options
29       are allowed. When no -t option is specified, all tables
30       will be dumped.
31    -x <table> Specify a table to exclude from the dump. Multiple
32       -x options are allowed. -t and -x are mutually exclusive.
33    -s Split tables: save the TTX data into separate TTX files per
34       table and write one small TTX file that contains references
35       to the individual table dumps. This file can be used as
36       input to ttx, as long as the table files are in the
37       same directory.
38    -i Do NOT disassemble TT instructions: when this option is given,
39       all TrueType programs (glyph programs, the font program and the
40       pre-program) will be written to the TTX file as hex data
41       instead of assembly. This saves some time and makes the TTX
42       file smaller.
43    -z <format> Specify a bitmap data export option for EBDT:
44       {'raw', 'row', 'bitwise', 'extfile'} or for the CBDT:
45       {'raw', 'extfile'} Each option does one of the following:
46         -z raw
47            * export the bitmap data as a hex dump
48         -z row
49            * export each row as hex data
50         -z bitwise
51            * export each row as binary in an ASCII art style
52         -z extfile
53            * export the data as external files with XML refences
54       If no export format is specified 'raw' format is used.
55    -e Don't ignore decompilation errors, but show a full traceback
56       and abort.
57    -y <number> Select font number for TrueType Collection,
58       starting from 0.
59
60    Compile options:
61    -m Merge with TrueType-input-file: specify a TrueType or OpenType
62       font file to be merged with the TTX file. This option is only
63       valid when at most one TTX file is specified.
64    -b Don't recalc glyph bounding boxes: use the values in the TTX
65       file as-is.
66"""
67
68
69import sys
70import os
71import getopt
72import re
73from fontTools.ttLib import TTFont
74from fontTools.ttLib.tables.otBase import OTLOffsetOverflowError
75from fontTools.ttLib.tables.otTables import fixLookupOverFlows, fixSubTableOverFlows
76from fontTools.misc.macCreatorType import getMacCreatorAndType
77from fontTools import version
78
79def usage():
80	print __doc__ % version
81	sys.exit(2)
82
83
84numberAddedRE = re.compile("(.*)#\d+$")
85opentypeheaderRE = re.compile('''sfntVersion=['"]OTTO["']''')
86
87def makeOutputFileName(input, outputDir, extension):
88	dir, file = os.path.split(input)
89	file, ext = os.path.splitext(file)
90	if outputDir:
91		dir = outputDir
92	output = os.path.join(dir, file + extension)
93	m = numberAddedRE.match(file)
94	if m:
95		file = m.group(1)
96	n = 1
97	while os.path.exists(output):
98		output = os.path.join(dir, file + "#" + repr(n) + extension)
99		n = n + 1
100	return output
101
102
103class Options:
104
105	listTables = 0
106	outputDir = None
107	outputFile = None
108	verbose = 0
109	quiet = 0
110	splitTables = 0
111	disassembleInstructions = 1
112	mergeFile = None
113	recalcBBoxes = 1
114	allowVID = 0
115	ignoreDecompileErrors = True
116	bitmapGlyphDataFormat = 'raw'
117
118	def __init__(self, rawOptions, numFiles):
119		self.onlyTables = []
120		self.skipTables = []
121		self.fontNumber = -1
122		for option, value in rawOptions:
123			# general options
124			if option == "-h":
125				print __doc__ % version
126				sys.exit(0)
127			elif option == "-d":
128				if not os.path.isdir(value):
129					print "The -d option value must be an existing directory"
130					sys.exit(2)
131				self.outputDir = value
132			elif option == "-o":
133				self.outputFile = value
134			elif option == "-v":
135				self.verbose = 1
136			elif option == "-q":
137				self.quiet = 1
138			# dump options
139			elif option == "-l":
140				self.listTables = 1
141			elif option == "-t":
142				self.onlyTables.append(value)
143			elif option == "-x":
144				self.skipTables.append(value)
145			elif option == "-s":
146				self.splitTables = 1
147			elif option == "-i":
148				self.disassembleInstructions = 0
149			elif option == "-z":
150				validOptions = ('raw', 'row', 'bitwise', 'extfile')
151				if value not in validOptions:
152					print "-z does not allow %s as a format. Use %s" % (option, validOptions)
153					sys.exit(2)
154				self.bitmapGlyphDataFormat = value
155			elif option == "-y":
156				self.fontNumber = int(value)
157			# compile options
158			elif option == "-m":
159				self.mergeFile = value
160			elif option == "-b":
161				self.recalcBBoxes = 0
162			elif option == "-a":
163				self.allowVID = 1
164			elif option == "-e":
165				self.ignoreDecompileErrors = False
166		if self.onlyTables and self.skipTables:
167			print "-t and -x options are mutually exclusive"
168			sys.exit(2)
169		if self.mergeFile and numFiles > 1:
170			print "Must specify exactly one TTX source file when using -m"
171			sys.exit(2)
172
173
174def ttList(input, output, options):
175	import string
176	ttf = TTFont(input, fontNumber=options.fontNumber)
177	reader = ttf.reader
178	tags = reader.keys()
179	tags.sort()
180	print 'Listing table info for "%s":' % input
181	format = "    %4s  %10s  %7s  %7s"
182	print format % ("tag ", "  checksum", " length", " offset")
183	print format % ("----", "----------", "-------", "-------")
184	for tag in tags:
185		entry = reader.tables[tag]
186		checkSum = long(entry.checkSum)
187		if checkSum < 0:
188			checkSum = checkSum + 0x100000000L
189		checksum = "0x" + string.zfill(hex(checkSum)[2:-1], 8)
190		print format % (tag, checksum, entry.length, entry.offset)
191	print
192	ttf.close()
193
194
195def ttDump(input, output, options):
196	if not options.quiet:
197		print 'Dumping "%s" to "%s"...' % (input, output)
198	ttf = TTFont(input, 0, verbose=options.verbose, allowVID=options.allowVID,
199			quiet=options.quiet,
200			ignoreDecompileErrors=options.ignoreDecompileErrors,
201			fontNumber=options.fontNumber)
202	ttf.saveXML(output,
203			quiet=options.quiet,
204			tables=options.onlyTables,
205			skipTables=options.skipTables,
206			splitTables=options.splitTables,
207			disassembleInstructions=options.disassembleInstructions,
208			bitmapGlyphDataFormat=options.bitmapGlyphDataFormat)
209	ttf.close()
210
211
212def ttCompile(input, output, options):
213	if not options.quiet:
214		print 'Compiling "%s" to "%s"...' % (input, output)
215	ttf = TTFont(options.mergeFile,
216			recalcBBoxes=options.recalcBBoxes,
217			verbose=options.verbose, allowVID=options.allowVID)
218	ttf.importXML(input, quiet=options.quiet)
219	try:
220		ttf.save(output)
221	except OTLOffsetOverflowError, e:
222		# XXX This shouldn't be here at all, it should be as close to the
223		# OTL code as possible.
224		overflowRecord = e.value
225		print "Attempting to fix OTLOffsetOverflowError", e
226		lastItem = overflowRecord
227		while 1:
228			ok = 0
229			if overflowRecord.itemName == None:
230				ok = fixLookupOverFlows(ttf, overflowRecord)
231			else:
232				ok = fixSubTableOverFlows(ttf, overflowRecord)
233			if not ok:
234				raise
235
236			try:
237				ttf.save(output)
238				break
239			except OTLOffsetOverflowError, e:
240				print "Attempting to fix OTLOffsetOverflowError", e
241				overflowRecord = e.value
242				if overflowRecord == lastItem:
243					raise
244
245	if options.verbose:
246		import time
247		print "finished at", time.strftime("%H:%M:%S", time.localtime(time.time()))
248
249
250def guessFileType(fileName):
251	base, ext = os.path.splitext(fileName)
252	try:
253		f = open(fileName, "rb")
254	except IOError:
255		return None
256	cr, tp = getMacCreatorAndType(fileName)
257	if tp in ("sfnt", "FFIL"):
258		return "TTF"
259	if ext == ".dfont":
260		return "TTF"
261	header = f.read(256)
262	head = header[:4]
263	if head == "OTTO":
264		return "OTF"
265	elif head == "ttcf":
266		return "TTC"
267	elif head in ("\0\1\0\0", "true"):
268		return "TTF"
269	elif head.lower() == "<?xm":
270		if opentypeheaderRE.match(header):
271			return "OTX"
272		else:
273			return "TTX"
274	return None
275
276
277def parseOptions(args):
278	try:
279		rawOptions, files = getopt.getopt(args, "ld:o:vqht:x:sim:z:baey:")
280	except getopt.GetoptError:
281		usage()
282
283	if not files:
284		usage()
285
286	options = Options(rawOptions, len(files))
287	jobs = []
288
289	for input in files:
290		tp = guessFileType(input)
291		if tp in ("OTF", "TTF", "TTC"):
292			extension = ".ttx"
293			if options.listTables:
294				action = ttList
295			else:
296				action = ttDump
297		elif tp == "TTX":
298			extension = ".ttf"
299			action = ttCompile
300		elif tp == "OTX":
301			extension = ".otf"
302			action = ttCompile
303		else:
304			print 'Unknown file type: "%s"' % input
305			continue
306
307		if options.outputFile:
308			output = options.outputFile
309		else:
310			output = makeOutputFileName(input, options.outputDir, extension)
311		jobs.append((action, input, output))
312	return jobs, options
313
314
315def process(jobs, options):
316	for action, input, output in jobs:
317		action(input, output, options)
318
319
320def waitForKeyPress():
321	"""Force the DOS Prompt window to stay open so the user gets
322	a chance to see what's wrong."""
323	import msvcrt
324	print '(Hit any key to exit)'
325	while not msvcrt.kbhit():
326		pass
327
328
329def main(args):
330	jobs, options = parseOptions(args)
331	try:
332		process(jobs, options)
333	except KeyboardInterrupt:
334		print "(Cancelled.)"
335	except SystemExit:
336		if sys.platform == "win32":
337			waitForKeyPress()
338		else:
339			raise
340	except:
341		if sys.platform == "win32":
342			import traceback
343			traceback.print_exc()
344			waitForKeyPress()
345		else:
346			raise
347
348
349if __name__ == "__main__":
350	main(sys.argv[1:])
351