API Change:
This will change XML output for GSUB/GPOS/GDEF/MATH/BASE/JSTF/...
Scripts that set the Version for those to 1.0 or other float values
also need fixing. A warning is emitted when code or XML needs fix.
There now is a Python implementation of variation axes, because this
makes it (much) easier to build variable fonts from code. Therefore,
the definitions in otTables.py are not needed anymore.
I had broken this in e06166b83aa82582dab2e011520b1a77f72aa9f9.
Fix that, and other issues. Since I made that last commit, it has
become clear that SingleSubst works by adding delta and then doing
module 65536.
HarfBuzz was updated for this in 2011:
commit 52ebdff49d13f239efc886de935d47be9860f6e5
Author: Behdad Esfahbod <behdad@behdad.org>
Date: Tue Sep 27 12:38:16 2011 -0400
Fix GSUB lookuptype 1 subtype 1 delta wrapping
All types of FeatureParams are correctly handled now.
The only thing not handled is broken fonts generated with the
old AFDKO that have their FeatureParams offset computed wrong.
I don't currently plan on handling those.
Fixes https://github.com/behdad/fonttools/issues/38
Version is really just a major.minor, NOT a Fixed. But it has
been implemented as Fixed. We now:
1. Check that major is 1,
2. If minor is not 0 (only defined for GDEF so far), then
print the whole thing as hex in XML,
3. When reading the XML, accept hex,
4. In all four methods dealing with Version, support both
fixed version (ie. 1.0), and long version (ie. 0x00010000).
fontTools/ttx.py
# support virtual GIDs, support handling some GSUB offset overflows.
fontTools/ttlib/__init__.py
# 1) make getReverseGlyphMap a public function; I find a reverse map
to often be useful
# 2) support virtual glyphs, e.g. references to GID's that are not in the font.
# Added the TTFont argument allowVID (default 0) to turn this off and on;
# added the arg requireReal ( default 0) so as to get the obvious
default behaviour when
# allowVID is 0 or 1, but to allow requiring a true GID when allowVID is 1.
fontTools/ttlib/tables/otBase.py
fontTools/ttlib/tables/otConverters.py
fontTools/ttlib/tables/otData.py
fontTools/ttlib/tables/otTables.py
# 1) speed optimization
# - collapse for loops
# - do not decompile extension lookups until a record is requested
from within the lookup.
# 2) handling offset overflows
# 3) support of extension lookups
# 4) Fixed FetauresParam converter class def so as to survive a font
that has this offset non-NULL.
# This fixes a stack dump.
# The data will now just get ignored
git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@511 4cde692c-a291-49d1-8350-778aa11640f8
