[Tutor] ttList-module problem
Mehta, Anish
Anish.Mehta@enst-bretagne.fr
Tue Apr 29 08:37:03 2003
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I just replied to the message. I was not aware that it will not go the=20
list. Sorry for the inconvenience. Now i will take care of that i always=20
post to the list.
I am attaching the ttx.py program. Please help me in understanding the=20
code.
I am trying to understand it step by step and also learning python as=20
well. But still i am a beginner in python. The first module=20
makeoutputdir in this is doing like this according to me:
It tries to find an available file name, making sure it doesn't take the =
name of an existing file, and if it sees a name in a particular format --=
- if that name has a trailing number --- it tries to create a new name wi=
th the next ascending number in sequence.
I am struck up with the module ttList. Not getting it properly. Roughly i=
think that it will print the information about some table in truetype fo=
nts in the form of format, checksum etc..
Thanks for responding.
Regards
Magnus Lyck=E5 wrote:
> At 11:45 2003-04-29 +0200, Mehta, Anish wrote:
>
>> Hello !
>>
>> I am having some problem in understanding this code. Firstly i am not=20
>> finding TTFont which is being imported with the command
>>
>> from fontTools.ttLib import TTFont
>
>
> It's even worse for me...
>
> >>> import fontTools
> Traceback (most recent call last):
> File "<interactive input>", line 1, in ?
> ImportError: No module named fontTools
>
> fontTools is not a standard library. It's probably helpful to
> explain what python packages you are working with. This might
> also be a question which is too specific for this mailing list.
>
>
> --=20
> Magnus Lycka (It's really Lyckå), magnus@thinkware.se
> Thinkware AB, Sweden, www.thinkware.se
> I code Python ~ The shortest path from thought to working program
>
> _______________________________________________
> Tutor maillist - Tutor@python.org
> http://mail.python.org/mailman/listinfo/tutor
>
>
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#! /usr/bin/env python
"""\
usage: ttx [options] inputfile1 [... inputfileN]
TTX %s -- From OpenType To XML And Back
If an input file is a TrueType or OpenType font file, it will be
dumped to an TTX file (an XML-based text format).
If an input file is a TTX file, it will be compiled to a TrueType
or OpenType font file.
Output files are created so they are unique: an existing file is
never overwrritten.
General options:
-h Help: print this message
-d <outputfolder> Specify a directory where the output files are
to be created.
-v Verbose: more messages will be written to stdout about what
is being done.
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.
-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.
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 boundig boxes: use the values in the TTX
file as-is.
"""
import sys
import os
import getopt
import re
from fontTools.ttLib import TTFont
from fontTools import version
def usage():
print __doc__ % version
sys.exit(2)
numberAddedRE = re.compile("(.*)#\d+$")
def makeOutputFileName(input, outputDir, extension):
dir, file = os.path.split(input)
file, ext = os.path.splitext(file)
if outputDir:
dir = outputDir
output = os.path.join(dir, file + extension)
m = numberAddedRE.match(file)
if m:
file = m.group(1)
n = 1
while os.path.exists(output):
output = os.path.join(dir, file + "#" + repr(n) + extension)
n = n + 1
return output
class Options:
listTables = 0
outputDir = None
verbose = 0
splitTables = 0
disassembleInstructions = 1
mergeFile = None
recalcBBoxes = 1
def __init__(self, rawOptions, numFiles):
self.onlyTables = []
self.skipTables = []
for option, value in rawOptions:
# general options
if option == "-h":
print __doc__ % version
sys.exit(0)
elif option == "-d":
if not os.path.isdir(value):
print "The -d option value must be an existing directory"
sys.exit(2)
self.outputDir = value
elif option == "-v":
self.verbose = 1
# dump options
elif option == "-l":
self.listTables = 1
elif option == "-t":
self.onlyTables.append(value)
elif option == "-x":
self.skipTables.append(value)
elif option == "-s":
self.splitTables = 1
elif option == "-i":
self.disassembleInstructions = 0
# compile options
elif option == "-m":
self.mergeFile = value
elif option == "-b":
self.recalcBBoxes = 0
if self.onlyTables and self.skipTables:
print "-t and -x options are mutually exlusive"
sys.exit(2)
if self.mergeFile and numFiles > 1:
print "Must specify exactly one TTX source file when using -i"
sys.exit(2)
def ttList(input, output, options):
ttf = TTFont(input)
reader = ttf.reader
tags = reader.keys()
tags.sort()
print 'Listing table info for "%s":' % input
format = " %4s %10s %7s %7s"
print format % ("tag ", " checksum", " length", " offset")
print format % ("----", "----------", "-------", "-------")
for tag in tags:
entry = reader.tables[tag]
checksum = "0x" + hex(entry.checkSum)[2:].zfill(8)
print format % (tag, checksum, entry.length, entry.offset)
print
ttf.close()
def ttDump(input, output, options):
print 'Dumping "%s" to "%s"...' % (input, output)
ttf = TTFont(input, 0, verbose=options.verbose)
ttf.saveXML(output,
tables=options.onlyTables,
skipTables=options.skipTables,
splitTables=options.splitTables,
disassembleInstructions=options.disassembleInstructions)
ttf.close()
def ttCompile(input, output, options):
print 'Compiling "%s" to "%s"...' % (input, output)
ttf = TTFont(options.mergeFile,
recalcBBoxes=options.recalcBBoxes,
verbose=options.verbose)
ttf.importXML(input)
ttf.save(output)
if options.verbose:
import time
print "finished at", time.strftime("%H:%M:%S", time.localtime(time.time()))
def guessFileType(fileName):
try:
f = open(fileName, "rb")
except IOError:
return None
try:
import macfs
except ImportError:
pass
else:
cr, tp = macfs.FSSpec(fileName).GetCreatorType()
if tp == "FFIL":
return "TTF"
header = f.read(256)
head = header[:4]
if head == "OTTO":
return "OTF"
elif head in ("\0\1\0\0", "true"):
return "TTF"
elif head.lower() == "<?xm":
if header.find('sfntVersion="OTTO"') > 0:
return "OTX"
else:
return "TTX"
return None
def parseOptions(args):
try:
rawOptions, files = getopt.getopt(args, "ld:vht:x:sim:b")
except getopt.GetoptError:
usage()
if not files:
usage()
options = Options(rawOptions, len(files))
jobs = []
for input in files:
tp = guessFileType(input)
if tp in ("OTF", "TTF"):
extension = ".ttx"
if options.listTables:
action = ttList
else:
action = ttDump
elif tp == "TTX":
extension = ".ttf"
action = ttCompile
elif tp == "OTX":
extension = ".otf"
action = ttCompile
else:
print 'Unknown file type: "%s"' % input
continue
output = makeOutputFileName(input, options.outputDir, extension)
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)'
while not msvcrt.kbhit():
pass
def main(args):
jobs, options = parseOptions(args)
try:
process(jobs, options)
except KeyboardInterrupt:
print "(Cancelled.)"
except SystemExit:
if sys.platform == "win32":
waitForKeyPress()
else:
raise
except:
if sys.platform == "win32":
import traceback
traceback.print_exc()
waitForKeyPress()
else:
raise
if __name__ == "__main__":
main(sys.argv[1:])
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