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Make a hidden feature accessible: optionally ignore decompilation errors,

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falling back to DefaultTable, retaining the binary data. It's a bit
dangerous to enable this by default, since it can lead to hiding other
errors or bugs (in the font or fonttools itself).


git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@524 4cde692c-a291-49d1-8350-778aa11640f8
This commit is contained in:
jvr 2008-03-01 09:30:17 +00:00
parent 2db352c748
commit 2545f16b54
1 changed files with 12 additions and 4 deletions
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16
Lib/fontTools/ttLib/__init__.py
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@ -42,7 +42,7 @@ Dumping 'prep' table...
""" """
# #
# $Id: __init__.py,v 1.48 2006-10-21 14:12:38 jvr Exp $ # $Id: __init__.py,v 1.49 2008-03-01 09:30:17 jvr Exp $
# #
import sys import sys
@ -70,7 +70,7 @@ class TTFont:
def __init__(self, file=None, res_name_or_index=None, def __init__(self, file=None, res_name_or_index=None,
sfntVersion="\000\001\000\000", checkChecksums=0, sfntVersion="\000\001\000\000", checkChecksums=0,
verbose=0, recalcBBoxes=1, allowVID=0): verbose=0, recalcBBoxes=1, allowVID=0, ignoreDecompileErrors=False):
"""The constructor can be called with a few different arguments. """The constructor can be called with a few different arguments.
When reading a font from disk, 'file' should be either a pathname When reading a font from disk, 'file' should be either a pathname
@ -112,7 +112,11 @@ class TTFont:
and does not exist in the font, then N is used as the virtual GID. and does not exist in the font, then N is used as the virtual GID.
Else, the first virtual GID is assigned as 0x1000 -1; for subsequent new Else, the first virtual GID is assigned as 0x1000 -1; for subsequent new
virtual GIDs, the next is one less than the previous. virtual GIDs, the next is one less than the previous.
If ignoreDecompileErrors is set to True, exceptions raised in
individual tables during decompilation will be ignored, falling
back to the DefaultTable implementation, which simply keeps the
binary data.
""" """
import sfnt import sfnt
@ -126,6 +130,7 @@ class TTFont:
self.reverseVIDDict = {} self.reverseVIDDict = {}
self.VIDDict = {} self.VIDDict = {}
self.allowVID = allowVID self.allowVID = allowVID
self.ignoreDecompileErrors = ignoreDecompileErrors
if not file: if not file:
self.sfntVersion = sfntVersion self.sfntVersion = sfntVersion
@ -365,7 +370,10 @@ class TTFont:
debugmsg("Decompiling '%s' table" % tag) debugmsg("Decompiling '%s' table" % tag)
try: try:
table.decompile(data, self) table.decompile(data, self)
except "_ _ F O O _ _": # dummy exception to disable exception catching except:
if not self.ignoreDecompileErrors:
raise
# fall back to DefaultTable, retaining the binary table data
print "An exception occurred during the decompilation of the '%s' table" % tag print "An exception occurred during the decompilation of the '%s' table" % tag
from tables.DefaultTable import DefaultTable from tables.DefaultTable import DefaultTable
import StringIO import StringIO