Lib/fontTools/ttx.py

"""\
usage: ttx [options] inputfile1 [... inputfileN]

    TTX -- From OpenType To XML And Back

    If an input file is a TrueType or OpenType font file, it will be
       decompiled to a TTX file (an XML-based text format).
    If an input file is a TTX file, it will be compiled to whatever 
       format the data is in, a TrueType or OpenType/CFF font file.

    Output files are created so they are unique: an existing file is
       never overwritten.

    General options:
    -h Help: print this message.
    --version: show version and exit.
    -d <outputfolder> Specify a directory where the output files are
       to be created.
    -o <outputfile> Specify a file to write the output to. A special
       value of - would use the standard output.
    -f Overwrite existing output file(s), ie. don't append numbers.
    -v Verbose: more messages will be written to stdout about what
       is being done.
    -q Quiet: No messages will be written to stdout about what
       is being done.
    -a allow virtual glyphs ID's on compile or decompile.

    Dump options:
    -l List table info: instead of dumping to a TTX file, list some
       minimal info about each table.
    -t <table> Specify a table to dump. Multiple -t options
       are allowed. When no -t option is specified, all tables
       will be dumped.
    -x <table> Specify a table to exclude from the dump. Multiple
       -x options are allowed. -t and -x are mutually exclusive.
    -s Split tables: save the TTX data into separate TTX files per
       table and write one small TTX file that contains references
       to the individual table dumps. This file can be used as
       input to ttx, as long as the table files are in the
       same directory.
    -g Split glyf table: Save the glyf data into separate TTX files
       per glyph and write a small TTX for the glyf table which
       contains references to the individual TTGlyph elements.
       NOTE: specifying -g implies -s (no need for -s together with -g)
    -i Do NOT disassemble TT instructions: when this option is given,
       all TrueType programs (glyph programs, the font program and the
       pre-program) will be written to the TTX file as hex data
       instead of assembly. This saves some time and makes the TTX
       file smaller.
    -z <format> Specify a bitmap data export option for EBDT:
       {'raw', 'row', 'bitwise', 'extfile'} or for the CBDT:
       {'raw', 'extfile'} Each option does one of the following:
         -z raw
            * export the bitmap data as a hex dump
         -z row
            * export each row as hex data
         -z bitwise
            * export each row as binary in an ASCII art style
         -z extfile
            * export the data as external files with XML references
       If no export format is specified 'raw' format is used.
    -e Don't ignore decompilation errors, but show a full traceback
       and abort.
    -y <number> Select font number for TrueType Collection (.ttc/.otc),
       starting from 0.
    --unicodedata <UnicodeData.txt> Use custom database file to write
       character names in the comments of the cmap TTX output.
    --newline <value> Control how line endings are written in the XML
       file. It can be 'LF', 'CR', or 'CRLF'. If not specified, the
       default platform-specific line endings are used.

    Compile options:
    -m Merge with TrueType-input-file: specify a TrueType or OpenType
       font file to be merged with the TTX file. This option is only
       valid when at most one TTX file is specified.
    -b Don't recalc glyph bounding boxes: use the values in the TTX
       file as-is.
    --recalc-timestamp Set font 'modified' timestamp to current time.
       By default, the modification time of the TTX file will be used.
    --no-recalc-timestamp Keep the original font 'modified' timestamp.
    --flavor <type> Specify flavor of output font file. May be 'woff'
      or 'woff2'. Note that WOFF2 requires the Brotli Python extension,
      available at https://github.com/google/brotli
    --with-zopfli Use Zopfli instead of Zlib to compress WOFF. The Python
      extension is available at https://pypi.python.org/pypi/zopfli
"""


from __future__ import print_function, division, absolute_import
from fontTools.misc.py23 import *
from fontTools.ttLib import TTFont, TTLibError
from fontTools.misc.macCreatorType import getMacCreatorAndType
from fontTools.unicode import setUnicodeData
from fontTools.misc.timeTools import timestampSinceEpoch
from fontTools.misc.loggingTools import Timer
from fontTools.misc.cliTools import makeOutputFileName
import os
import sys
import getopt
import re
import logging


log = logging.getLogger("fontTools.ttx")

opentypeheaderRE = re.compile('''sfntVersion=['"]OTTO["']''')


class Options(object):

	listTables = False
	outputDir = None
	outputFile = None
	overWrite = False
	verbose = False
	quiet = False
	splitTables = False
	splitGlyphs = False
	disassembleInstructions = True
	mergeFile = None
	recalcBBoxes = True
	allowVID = False
	ignoreDecompileErrors = True
	bitmapGlyphDataFormat = 'raw'
	unicodedata = None
	newlinestr = None
	recalcTimestamp = None
	flavor = None
	useZopfli = False

	def __init__(self, rawOptions, numFiles):
		self.onlyTables = []
		self.skipTables = []
		self.fontNumber = -1
		for option, value in rawOptions:
			# general options
			if option == "-h":
				print(__doc__)
				sys.exit(0)
			elif option == "--version":
				from fontTools import version
				print(version)
				sys.exit(0)
			elif option == "-d":
				if not os.path.isdir(value):
					raise getopt.GetoptError("The -d option value must be an existing directory")
				self.outputDir = value
			elif option == "-o":
				self.outputFile = value
			elif option == "-f":
				self.overWrite = True
			elif option == "-v":
				self.verbose = True
			elif option == "-q":
				self.quiet = True
			# dump options
			elif option == "-l":
				self.listTables = True
			elif option == "-t":
				# pad with space if table tag length is less than 4
				value = value.ljust(4)
				self.onlyTables.append(value)
			elif option == "-x":
				# pad with space if table tag length is less than 4
				value = value.ljust(4)
				self.skipTables.append(value)
			elif option == "-s":
				self.splitTables = True
			elif option == "-g":
				# -g implies (and forces) splitTables
				self.splitGlyphs = True
				self.splitTables = True
			elif option == "-i":
				self.disassembleInstructions = False
			elif option == "-z":
				validOptions = ('raw', 'row', 'bitwise', 'extfile')
				if value not in validOptions:
					raise getopt.GetoptError(
						"-z does not allow %s as a format. Use %s" % (option, validOptions))
				self.bitmapGlyphDataFormat = value
			elif option == "-y":
				self.fontNumber = int(value)
			# compile options
			elif option == "-m":
				self.mergeFile = value
			elif option == "-b":
				self.recalcBBoxes = False
			elif option == "-a":
				self.allowVID = True
			elif option == "-e":
				self.ignoreDecompileErrors = False
			elif option == "--unicodedata":
				self.unicodedata = value
			elif option == "--newline":
				validOptions = ('LF', 'CR', 'CRLF')
				if value == "LF":
					self.newlinestr = "\n"
				elif value == "CR":
					self.newlinestr = "\r"
				elif value == "CRLF":
					self.newlinestr = "\r\n"
				else:
					raise getopt.GetoptError(
						"Invalid choice for --newline: %r (choose from %s)"
						% (value, ", ".join(map(repr, validOptions))))
			elif option == "--recalc-timestamp":
				self.recalcTimestamp = True
			elif option == "--no-recalc-timestamp":
				self.recalcTimestamp = False
			elif option == "--flavor":
				self.flavor = value
			elif option == "--with-zopfli":
				self.useZopfli = True
		if self.verbose and self.quiet:
			raise getopt.GetoptError("-q and -v options are mutually exclusive")
		if self.verbose:
			self.logLevel = logging.DEBUG
		elif self.quiet:
			self.logLevel = logging.WARNING
		else:
			self.logLevel = logging.INFO
		if self.mergeFile and self.flavor:
			raise getopt.GetoptError("-m and --flavor options are mutually exclusive")
		if self.onlyTables and self.skipTables:
			raise getopt.GetoptError("-t and -x options are mutually exclusive")
		if self.mergeFile and numFiles > 1:
			raise getopt.GetoptError("Must specify exactly one TTX source file when using -m")
		if self.flavor != 'woff' and self.useZopfli:
			raise getopt.GetoptError("--with-zopfli option requires --flavor 'woff'")


def ttList(input, output, options):
	ttf = TTFont(input, fontNumber=options.fontNumber, lazy=True)
	reader = ttf.reader
	tags = sorted(reader.keys())
	print('Listing table info for "%s":' % input)
	format = "    %4s  %10s  %8s  %8s"
	print(format % ("tag ", "  checksum", "  length", "  offset"))
	print(format % ("----", "----------", "--------", "--------"))
	for tag in tags:
		entry = reader.tables[tag]
		if ttf.flavor == "woff2":
			# WOFF2 doesn't store table checksums, so they must be calculated
			from fontTools.ttLib.sfnt import calcChecksum
			data = entry.loadData(reader.transformBuffer)
			checkSum = calcChecksum(data)
		else:
			checkSum = int(entry.checkSum)
		if checkSum < 0:
			checkSum = checkSum + 0x100000000
		checksum = "0x%08X" % checkSum
		print(format % (tag, checksum, entry.length, entry.offset))
	print()
	ttf.close()


@Timer(log, 'Done dumping TTX in %(time).3f seconds')
def ttDump(input, output, options):
	log.info('Dumping "%s" to "%s"...', input, output)
	if options.unicodedata:
		setUnicodeData(options.unicodedata)
	ttf = TTFont(input, 0, allowVID=options.allowVID,
			ignoreDecompileErrors=options.ignoreDecompileErrors,
			fontNumber=options.fontNumber)
	ttf.saveXML(output,
			tables=options.onlyTables,
			skipTables=options.skipTables,
			splitTables=options.splitTables,
			splitGlyphs=options.splitGlyphs,
			disassembleInstructions=options.disassembleInstructions,
			bitmapGlyphDataFormat=options.bitmapGlyphDataFormat,
			newlinestr=options.newlinestr)
	ttf.close()


@Timer(log, 'Done compiling TTX in %(time).3f seconds')
def ttCompile(input, output, options):
	log.info('Compiling "%s" to "%s"...' % (input, output))
	if options.useZopfli:
		from fontTools.ttLib import sfnt
		sfnt.USE_ZOPFLI = True
	ttf = TTFont(options.mergeFile, flavor=options.flavor,
			recalcBBoxes=options.recalcBBoxes,
			recalcTimestamp=options.recalcTimestamp,
			allowVID=options.allowVID)
	ttf.importXML(input)

	if options.recalcTimestamp is None and 'head' in ttf:
		# use TTX file modification time for head "modified" timestamp
		mtime = os.path.getmtime(input)
		ttf['head'].modified = timestampSinceEpoch(mtime)

	ttf.save(output)


def guessFileType(fileName):
	base, ext = os.path.splitext(fileName)
	try:
		with open(fileName, "rb") as f:
			header = f.read(256)
	except IOError:
		return None

	if header.startswith(b'\xef\xbb\xbf<?xml'):
		header = header.lstrip(b'\xef\xbb\xbf')
	cr, tp = getMacCreatorAndType(fileName)
	if tp in ("sfnt", "FFIL"):
		return "TTF"
	if ext == ".dfont":
		return "TTF"
	head = Tag(header[:4])
	if head == "OTTO":
		return "OTF"
	elif head == "ttcf":
		return "TTC"
	elif head in ("\0\1\0\0", "true"):
		return "TTF"
	elif head == "wOFF":
		return "WOFF"
	elif head == "wOF2":
		return "WOFF2"
	elif head == "<?xm":
		# Use 'latin1' because that can't fail.
		header = tostr(header, 'latin1')
		if opentypeheaderRE.search(header):
			return "OTX"
		else:
			return "TTX"
	return None


def parseOptions(args):
	rawOptions, files = getopt.getopt(args, "ld:o:fvqht:x:sgim:z:baey:",
			['unicodedata=', "recalc-timestamp", "no-recalc-timestamp",
			 'flavor=', 'version', 'with-zopfli', 'newline='])

	options = Options(rawOptions, len(files))
	jobs = []

	if not files:
		raise getopt.GetoptError('Must specify at least one input file')

	for input in files:
		if not os.path.isfile(input):
			raise getopt.GetoptError('File not found: "%s"' % input)
		tp = guessFileType(input)
		if tp in ("OTF", "TTF", "TTC", "WOFF", "WOFF2"):
			extension = ".ttx"
			if options.listTables:
				action = ttList
			else:
				action = ttDump
		elif tp == "TTX":
			extension = "."+options.flavor if options.flavor else ".ttf"
			action = ttCompile
		elif tp == "OTX":
			extension = "."+options.flavor if options.flavor else ".otf"
			action = ttCompile
		else:
			raise getopt.GetoptError('Unknown file type: "%s"' % input)

		if options.outputFile:
			output = options.outputFile
		else:
			output = makeOutputFileName(input, options.outputDir, extension, options.overWrite)
			# 'touch' output file to avoid race condition in choosing file names
			if action != ttList:
				open(output, 'a').close()
		jobs.append((action, input, output))
	return jobs, options


def process(jobs, options):
	for action, input, output in jobs:
		action(input, output, options)


def waitForKeyPress():
	"""Force the DOS Prompt window to stay open so the user gets
	a chance to see what's wrong."""
	import msvcrt
	print('(Hit any key to exit)', file=sys.stderr)
	while not msvcrt.kbhit():
		pass


def main(args=None):
	from fontTools import configLogger

	if args is None:
		args = sys.argv[1:]
	try:
		jobs, options = parseOptions(args)
	except getopt.GetoptError as e:
		print("%s\nERROR: %s" % (__doc__, e), file=sys.stderr)
		sys.exit(2)

	configLogger(level=options.logLevel)

	try:
		process(jobs, options)
	except KeyboardInterrupt:
		log.error("(Cancelled.)")
		sys.exit(1)
	except SystemExit:
		if sys.platform == "win32":
			waitForKeyPress()
		raise
	except TTLibError as e:
		log.error(e)
		sys.exit(1)
	except:
		log.exception('Unhandled exception has occurred')
		if sys.platform == "win32":
			waitForKeyPress()
		sys.exit(1)


if __name__ == "__main__":
	sys.exit(main())