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fuchsia / third_party / fonttools / refs/tags/3.5.0 / . / Lib / fontTools / subset / __init__.py
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# Copyright 2013 Google, Inc. All Rights Reserved.
#
# Google Author(s): Behdad Esfahbod
from __future__ import print_function, division, absolute_import
from fontTools.misc.py23 import *
from fontTools import ttLib
from fontTools.ttLib.tables import otTables
from fontTools.misc import psCharStrings
from fontTools.pens.boundsPen import BoundsPen
from fontTools.misc.loggingTools import Timer
import sys
import struct
import array
import logging
from types import MethodType
__usage__ = "pyftsubset font-file [glyph...] [--option=value]..."
__doc__="""\
pyftsubset -- OpenType font subsetter and optimizer
pyftsubset is an OpenType font subsetter and optimizer, based on fontTools.
It accepts any TT- or CFF-flavored OpenType (.otf or .ttf) or WOFF (.woff)
font file. The subsetted glyph set is based on the specified glyphs
or characters, and specified OpenType layout features.
The tool also performs some size-reducing optimizations, aimed for using
subset fonts as webfonts. Individual optimizations can be enabled or
disabled, and are enabled by default when they are safe.
Usage:
"""+__usage__+"""
At least one glyph or one of --gids, --gids-file, --glyphs, --glyphs-file,
--text, --text-file, --unicodes, or --unicodes-file, must be specified.
Arguments:
font-file
The input font file.
glyph
Specify one or more glyph identifiers to include in the subset. Must be
PS glyph names, or the special string '*' to keep the entire glyph set.
Initial glyph set specification:
These options populate the initial glyph set. Same option can appear
multiple times, and the results are accummulated.
--gids=<NNN>[,<NNN>...]
Specify comma/whitespace-separated list of glyph IDs or ranges as
decimal numbers. For example, --gids=10-12,14 adds glyphs with
numbers 10, 11, 12, and 14.
--gids-file=<path>
Like --gids but reads from a file. Anything after a '#' on any line
is ignored as comments.
--glyphs=<glyphname>[,<glyphname>...]
Specify comma/whitespace-separated PS glyph names to add to the subset.
Note that only PS glyph names are accepted, not gidNNN, U+XXXX, etc
that are accepted on the command line. The special string '*' wil keep
the entire glyph set.
--glyphs-file=<path>
Like --glyphs but reads from a file. Anything after a '#' on any line
is ignored as comments.
--text=<text>
Specify characters to include in the subset, as UTF-8 string.
--text-file=<path>
Like --text but reads from a file. Newline character are not added to
the subset.
--unicodes=<XXXX>[,<XXXX>...]
Specify comma/whitespace-separated list of Unicode codepoints or
ranges as hex numbers, optionally prefixed with 'U+', 'u', etc.
For example, --unicodes=41-5a,61-7a adds ASCII letters, so does
the more verbose --unicodes=U+0041-005A,U+0061-007A.
The special strings '*' will choose all Unicode characters mapped
by the font.
--unicodes-file=<path>
Like --unicodes, but reads from a file. Anything after a '#' on any
line in the file is ignored as comments.
--ignore-missing-glyphs
Do not fail if some requested glyphs or gids are not available in
the font.
--no-ignore-missing-glyphs
Stop and fail if some requested glyphs or gids are not available
in the font. [default]
--ignore-missing-unicodes [default]
Do not fail if some requested Unicode characters (including those
indirectly specified using --text or --text-file) are not available
in the font.
--no-ignore-missing-unicodes
Stop and fail if some requested Unicode characters are not available
in the font.
Note the default discrepancy between ignoring missing glyphs versus
unicodes. This is for historical reasons and in the future
--no-ignore-missing-unicodes might become default.
Other options:
For the other options listed below, to see the current value of the option,
pass a value of '?' to it, with or without a '='.
Examples:
$ pyftsubset --glyph-names?
Current setting for 'glyph-names' is: False
$ ./pyftsubset --name-IDs=?
Current setting for 'name-IDs' is: [1, 2]
$ ./pyftsubset --hinting? --no-hinting --hinting?
Current setting for 'hinting' is: True
Current setting for 'hinting' is: False
Output options:
--output-file=<path>
The output font file. If not specified, the subsetted font
will be saved in as font-file.subset.
--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 the Google Zopfli algorithm to compress WOFF. The output is 3-8 %
smaller than pure zlib, but the compression speed is much slower.
The Zopfli Python bindings are available at:
https://github.com/anthrotype/py-zopfli
Glyph set expansion:
These options control how additional glyphs are added to the subset.
--notdef-glyph
Add the '.notdef' glyph to the subset (ie, keep it). [default]
--no-notdef-glyph
Drop the '.notdef' glyph unless specified in the glyph set. This
saves a few bytes, but is not possible for Postscript-flavored
fonts, as those require '.notdef'. For TrueType-flavored fonts,
this works fine as long as no unsupported glyphs are requested
from the font.
--notdef-outline
Keep the outline of '.notdef' glyph. The '.notdef' glyph outline is
used when glyphs not supported by the font are to be shown. It is not
needed otherwise.
--no-notdef-outline
When including a '.notdef' glyph, remove its outline. This saves
a few bytes. [default]
--recommended-glyphs
Add glyphs 0, 1, 2, and 3 to the subset, as recommended for
TrueType-flavored fonts: '.notdef', 'NULL' or '.null', 'CR', 'space'.
Some legacy software might require this, but no modern system does.
--no-recommended-glyphs
Do not add glyphs 0, 1, 2, and 3 to the subset, unless specified in
glyph set. [default]
--layout-features[+|-]=<feature>[,<feature>...]
Specify (=), add to (+=) or exclude from (-=) the comma-separated
set of OpenType layout feature tags that will be preserved.
Glyph variants used by the preserved features are added to the
specified subset glyph set. By default, 'calt', 'ccmp', 'clig', 'curs',
'kern', 'liga', 'locl', 'mark', 'mkmk', 'rclt', 'rlig' and all features
required for script shaping are preserved. To see the full list, try
'--layout-features=?'. Use '*' to keep all features.
Multiple --layout-features options can be provided if necessary.
Examples:
--layout-features+=onum,pnum,ss01
* Keep the default set of features and 'onum', 'pnum', 'ss01'.
--layout-features-='mark','mkmk'
* Keep the default set of features but drop 'mark' and 'mkmk'.
--layout-features='kern'
* Only keep the 'kern' feature, drop all others.
--layout-features=''
* Drop all features.
--layout-features='*'
* Keep all features.
--layout-features+=aalt --layout-features-=vrt2
* Keep default set of features plus 'aalt', but drop 'vrt2'.
Hinting options:
--hinting
Keep hinting [default]
--no-hinting
Drop glyph-specific hinting and font-wide hinting tables, as well
as remove hinting-related bits and pieces from other tables (eg. GPOS).
See --hinting-tables for list of tables that are dropped by default.
Instructions and hints are stripped from 'glyf' and 'CFF ' tables
respectively. This produces (sometimes up to 30%) smaller fonts that
are suitable for extremely high-resolution systems, like high-end
mobile devices and retina displays.
XXX Note: Currently there is a known bug in 'CFF ' hint stripping that
might make the font unusable as a webfont as they will be rejected by
OpenType Sanitizer used in common browsers. For more information see:
https://github.com/behdad/fonttools/issues/144
The --desubroutinize options works around that bug.
Optimization options:
--desubroutinize
Remove CFF use of subroutinizes. Subroutinization is a way to make CFF
fonts smaller. For small subsets however, desubroutinizing might make
the font smaller. It has even been reported that desubroutinized CFF
fonts compress better (produce smaller output) WOFF and WOFF2 fonts.
Also see note under --no-hinting.
--no-desubroutinize [default]
Leave CFF subroutinizes as is, only throw away unused subroutinizes.
Font table options:
--drop-tables[+|-]=<table>[,<table>...]
Specify (=), add to (+=) or exclude from (-=) the comma-separated
set of tables that will be be dropped.
By default, the following tables are dropped:
'BASE', 'JSTF', 'DSIG', 'EBDT', 'EBLC', 'EBSC', 'SVG ', 'PCLT', 'LTSH'
and Graphite tables: 'Feat', 'Glat', 'Gloc', 'Silf', 'Sill'
and color tables: 'CBLC', 'CBDT', 'sbix'.
The tool will attempt to subset the remaining tables.
Examples:
--drop-tables-='SVG '
* Drop the default set of tables but keep 'SVG '.
--drop-tables+=GSUB
* Drop the default set of tables and 'GSUB'.
--drop-tables=DSIG
* Only drop the 'DSIG' table, keep all others.
--drop-tables=
* Keep all tables.
--no-subset-tables+=<table>[,<table>...]
Add to the set of tables that will not be subsetted.
By default, the following tables are included in this list, as
they do not need subsetting (ignore the fact that 'loca' is listed
here): 'gasp', 'head', 'hhea', 'maxp', 'vhea', 'OS/2', 'loca',
'name', 'cvt ', 'fpgm', 'prep', 'VMDX', 'DSIG' and 'CPAL'.
By default, tables that the tool does not know how to subset and are not
specified here will be dropped from the font, unless --passthrough-tables
option is passed.
Example:
--no-subset-tables+=FFTM
* Keep 'FFTM' table in the font by preventing subsetting.
--passthrough-tables
Do not drop tables that the tool does not know how to subset.
--no-passthrough-tables
Tables that the tool does not know how to subset and are not specified
in --no-subset-tables will be dropped from the font. [default]
--hinting-tables[-]=<table>[,<table>...]
Specify (=), add to (+=) or exclude from (-=) the list of font-wide
hinting tables that will be dropped if --no-hinting is specified,
Examples:
--hinting-tables-='VDMX'
* Drop font-wide hinting tables except 'VDMX'.
--hinting-tables=''
* Keep all font-wide hinting tables (but strip hints from glyphs).
--legacy-kern
Keep TrueType 'kern' table even when OpenType 'GPOS' is available.
--no-legacy-kern
Drop TrueType 'kern' table if OpenType 'GPOS' is available. [default]
Font naming options:
These options control what is retained in the 'name' table. For numerical
codes, see: http://www.microsoft.com/typography/otspec/name.htm
--name-IDs[+|-]=<nameID>[,<nameID>...]
Specify (=), add to (+=) or exclude from (-=) the set of 'name' table
entry nameIDs that will be preserved. By default only nameID 1 (Family)
and nameID 2 (Style) are preserved. Use '*' to keep all entries.
Examples:
--name-IDs+=0,4,6
* Also keep Copyright, Full name and PostScript name entry.
--name-IDs=''
* Drop all 'name' table entries.
--name-IDs='*'
* keep all 'name' table entries
--name-legacy
Keep legacy (non-Unicode) 'name' table entries (0.x, 1.x etc.).
XXX Note: This might be needed for some fonts that have no Unicode name
entires for English. See: https://github.com/behdad/fonttools/issues/146
--no-name-legacy
Drop legacy (non-Unicode) 'name' table entries [default]
--name-languages[+|-]=<langID>[,<langID>]
Specify (=), add to (+=) or exclude from (-=) the set of 'name' table
langIDs that will be preserved. By default only records with langID
0x0409 (English) are preserved. Use '*' to keep all langIDs.
--obfuscate-names
Make the font unusable as a system font by replacing name IDs 1, 2, 3, 4,
and 6 with dummy strings (it is still fully functional as webfont).
Glyph naming and encoding options:
--glyph-names
Keep PS glyph names in TT-flavored fonts. In general glyph names are
not needed for correct use of the font. However, some PDF generators
and PDF viewers might rely on glyph names to extract Unicode text
from PDF documents.
--no-glyph-names
Drop PS glyph names in TT-flavored fonts, by using 'post' table
version 3.0. [default]
--legacy-cmap
Keep the legacy 'cmap' subtables (0.x, 1.x, 4.x etc.).
--no-legacy-cmap
Drop the legacy 'cmap' subtables. [default]
--symbol-cmap
Keep the 3.0 symbol 'cmap'.
--no-symbol-cmap
Drop the 3.0 symbol 'cmap'. [default]
Other font-specific options:
--recalc-bounds
Recalculate font bounding boxes.
--no-recalc-bounds
Keep original font bounding boxes. This is faster and still safe
for all practical purposes. [default]
--recalc-timestamp
Set font 'modified' timestamp to current time.
--no-recalc-timestamp
Do not modify font 'modified' timestamp. [default]
--canonical-order
Order tables as recommended in the OpenType standard. This is not
required by the standard, nor by any known implementation.
--no-canonical-order
Keep original order of font tables. This is faster. [default]
--prune-unicode-ranges
Update the 'OS/2 ulUnicodeRange*' bits after subsetting. The Unicode
ranges defined in the OpenType specification v1.7 are intersected with
the Unicode codepoints specified in the font's Unicode 'cmap' subtables:
when no overlap is found, the bit will be switched off. However, it will
*not* be switched on if an intersection is found. [default]
--no-prune-unicode-ranges
Don't change the 'OS/2 ulUnicodeRange*' bits.
--recalc-average-width
Update the 'OS/2 xAvgCharWidth' field after subsetting.
--no-recalc-average-width
Don't change the 'OS/2 xAvgCharWidth' field. [default]
Application options:
--verbose
Display verbose information of the subsetting process.
--timing
Display detailed timing information of the subsetting process.
--xml
Display the TTX XML representation of subsetted font.
Example:
Produce a subset containing the characters ' !"#$%' without performing
size-reducing optimizations:
$ pyftsubset font.ttf --unicodes="U+0020-0025" \\
--layout-features='*' --glyph-names --symbol-cmap --legacy-cmap \\
--notdef-glyph --notdef-outline --recommended-glyphs \\
--name-IDs='*' --name-legacy --name-languages='*'
"""
log = logging.getLogger("fontTools.subset")
def _log_glyphs(self, glyphs, font=None):
self.info("Glyph names: %s", sorted(glyphs))
if font:
reverseGlyphMap = font.getReverseGlyphMap()
self.info("Glyph IDs: %s", sorted(reverseGlyphMap[g] for g in glyphs))
# bind "glyphs" function to 'log' object
log.glyphs = MethodType(_log_glyphs, log)
# I use a different timing channel so I can configure it separately from the
# main module's logger
timer = Timer(logger=logging.getLogger("fontTools.subset.timer"))
def _add_method(*clazzes):
"""Returns a decorator function that adds a new method to one or
more classes."""
def wrapper(method):
done = []
for clazz in clazzes:
if clazz in done: continue # Support multiple names of a clazz
done.append(clazz)
assert clazz.__name__ != 'DefaultTable', \
'Oops, table class not found.'
assert not hasattr(clazz, method.__name__), \
"Oops, class '%s' has method '%s'." % (clazz.__name__,
method.__name__)
setattr(clazz, method.__name__, method)
return None
return wrapper
def _uniq_sort(l):
return sorted(set(l))
def _set_update(s, *others):
# Jython's set.update only takes one other argument.
# Emulate real set.update...
for other in others:
s.update(other)
def _dict_subset(d, glyphs):
return {g:d[g] for g in glyphs}
@_add_method(otTables.Coverage)
def intersect(self, glyphs):
"""Returns ascending list of matching coverage values."""
return [i for i,g in enumerate(self.glyphs) if g in glyphs]
@_add_method(otTables.Coverage)
def intersect_glyphs(self, glyphs):
"""Returns set of intersecting glyphs."""
return set(g for g in self.glyphs if g in glyphs)
@_add_method(otTables.Coverage)
def subset(self, glyphs):
"""Returns ascending list of remaining coverage values."""
indices = self.intersect(glyphs)
self.glyphs = [g for g in self.glyphs if g in glyphs]
return indices
@_add_method(otTables.Coverage)
def remap(self, coverage_map):
"""Remaps coverage."""
self.glyphs = [self.glyphs[i] for i in coverage_map]
@_add_method(otTables.ClassDef)
def intersect(self, glyphs):
"""Returns ascending list of matching class values."""
return _uniq_sort(
([0] if any(g not in self.classDefs for g in glyphs) else []) +
[v for g,v in self.classDefs.items() if g in glyphs])
@_add_method(otTables.ClassDef)
def intersect_class(self, glyphs, klass):
"""Returns set of glyphs matching class."""
if klass == 0:
return set(g for g in glyphs if g not in self.classDefs)
return set(g for g,v in self.classDefs.items()
if v == klass and g in glyphs)
@_add_method(otTables.ClassDef)
def subset(self, glyphs, remap=False):
"""Returns ascending list of remaining classes."""
self.classDefs = {g:v for g,v in self.classDefs.items() if g in glyphs}
# Note: while class 0 has the special meaning of "not matched",
# if no glyph will ever /not match/, we can optimize class 0 out too.
indices = _uniq_sort(
([0] if any(g not in self.classDefs for g in glyphs) else []) +
list(self.classDefs.values()))
if remap:
self.remap(indices)
return indices
@_add_method(otTables.ClassDef)
def remap(self, class_map):
"""Remaps classes."""
self.classDefs = {g:class_map.index(v) for g,v in self.classDefs.items()}
@_add_method(otTables.SingleSubst)
def closure_glyphs(self, s, cur_glyphs):
s.glyphs.update(v for g,v in self.mapping.items() if g in cur_glyphs)
@_add_method(otTables.SingleSubst)
def subset_glyphs(self, s):
self.mapping = {g:v for g,v in self.mapping.items()
if g in s.glyphs and v in s.glyphs}
return bool(self.mapping)
@_add_method(otTables.MultipleSubst)
def closure_glyphs(self, s, cur_glyphs):
for glyph, subst in self.mapping.items():
if glyph in cur_glyphs:
_set_update(s.glyphs, subst)
@_add_method(otTables.MultipleSubst)
def subset_glyphs(self, s):
self.mapping = {g:v for g,v in self.mapping.items()
if g in s.glyphs and all(sub in s.glyphs for sub in v)}
return bool(self.mapping)
@_add_method(otTables.AlternateSubst)
def closure_glyphs(self, s, cur_glyphs):
_set_update(s.glyphs, *(vlist for g,vlist in self.alternates.items()
if g in cur_glyphs))
@_add_method(otTables.AlternateSubst)
def subset_glyphs(self, s):
self.alternates = {g:vlist
for g,vlist in self.alternates.items()
if g in s.glyphs and
all(v in s.glyphs for v in vlist)}
return bool(self.alternates)
@_add_method(otTables.LigatureSubst)
def closure_glyphs(self, s, cur_glyphs):
_set_update(s.glyphs, *([seq.LigGlyph for seq in seqs
if all(c in s.glyphs for c in seq.Component)]
for g,seqs in self.ligatures.items()
if g in cur_glyphs))
@_add_method(otTables.LigatureSubst)
def subset_glyphs(self, s):
self.ligatures = {g:v for g,v in self.ligatures.items()
if g in s.glyphs}
self.ligatures = {g:[seq for seq in seqs
if seq.LigGlyph in s.glyphs and
all(c in s.glyphs for c in seq.Component)]
for g,seqs in self.ligatures.items()}
self.ligatures = {g:v for g,v in self.ligatures.items() if v}
return bool(self.ligatures)
@_add_method(otTables.ReverseChainSingleSubst)
def closure_glyphs(self, s, cur_glyphs):
if self.Format == 1:
indices = self.Coverage.intersect(cur_glyphs)
if(not indices or
not all(c.intersect(s.glyphs)
for c in self.LookAheadCoverage + self.BacktrackCoverage)):
return
s.glyphs.update(self.Substitute[i] for i in indices)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ReverseChainSingleSubst)
def subset_glyphs(self, s):
if self.Format == 1:
indices = self.Coverage.subset(s.glyphs)
self.Substitute = [self.Substitute[i] for i in indices]
# Now drop rules generating glyphs we don't want
indices = [i for i,sub in enumerate(self.Substitute)
if sub in s.glyphs]
self.Substitute = [self.Substitute[i] for i in indices]
self.Coverage.remap(indices)
self.GlyphCount = len(self.Substitute)
return bool(self.GlyphCount and
all(c.subset(s.glyphs)
for c in self.LookAheadCoverage+self.BacktrackCoverage))
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.SinglePos)
def subset_glyphs(self, s):
if self.Format == 1:
return len(self.Coverage.subset(s.glyphs))
elif self.Format == 2:
indices = self.Coverage.subset(s.glyphs)
values = self.Value
count = len(values)
self.Value = [values[i] for i in indices if i < count]
self.ValueCount = len(self.Value)
return bool(self.ValueCount)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.SinglePos)
def prune_post_subset(self, options):
if not options.hinting:
# Drop device tables
self.ValueFormat &= ~0x00F0
return True
@_add_method(otTables.PairPos)
def subset_glyphs(self, s):
if self.Format == 1:
indices = self.Coverage.subset(s.glyphs)
pairs = self.PairSet
count = len(pairs)
self.PairSet = [pairs[i] for i in indices if i < count]
for p in self.PairSet:
p.PairValueRecord = [r for r in p.PairValueRecord if r.SecondGlyph in s.glyphs]
p.PairValueCount = len(p.PairValueRecord)
# Remove empty pairsets
indices = [i for i,p in enumerate(self.PairSet) if p.PairValueCount]
self.Coverage.remap(indices)
self.PairSet = [self.PairSet[i] for i in indices]
self.PairSetCount = len(self.PairSet)
return bool(self.PairSetCount)
elif self.Format == 2:
class1_map = [c for c in self.ClassDef1.subset(s.glyphs, remap=True) if c < self.Class1Count]
class2_map = [c for c in self.ClassDef2.subset(s.glyphs, remap=True) if c < self.Class2Count]
self.Class1Record = [self.Class1Record[i] for i in class1_map]
for c in self.Class1Record:
c.Class2Record = [c.Class2Record[i] for i in class2_map]
self.Class1Count = len(class1_map)
self.Class2Count = len(class2_map)
return bool(self.Class1Count and
self.Class2Count and
self.Coverage.subset(s.glyphs))
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.PairPos)
def prune_post_subset(self, options):
if not options.hinting:
# Drop device tables
self.ValueFormat1 &= ~0x00F0
self.ValueFormat2 &= ~0x00F0
return True
@_add_method(otTables.CursivePos)
def subset_glyphs(self, s):
if self.Format == 1:
indices = self.Coverage.subset(s.glyphs)
records = self.EntryExitRecord
count = len(records)
self.EntryExitRecord = [records[i] for i in indices if i < count]
self.EntryExitCount = len(self.EntryExitRecord)
return bool(self.EntryExitCount)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.Anchor)
def prune_hints(self):
# Drop device tables / contour anchor point
self.ensureDecompiled()
self.Format = 1
@_add_method(otTables.CursivePos)
def prune_post_subset(self, options):
if not options.hinting:
for rec in self.EntryExitRecord:
if rec.EntryAnchor: rec.EntryAnchor.prune_hints()
if rec.ExitAnchor: rec.ExitAnchor.prune_hints()
return True
@_add_method(otTables.MarkBasePos)
def subset_glyphs(self, s):
if self.Format == 1:
mark_indices = self.MarkCoverage.subset(s.glyphs)
self.MarkArray.MarkRecord = [self.MarkArray.MarkRecord[i] for i in mark_indices]
self.MarkArray.MarkCount = len(self.MarkArray.MarkRecord)
base_indices = self.BaseCoverage.subset(s.glyphs)
self.BaseArray.BaseRecord = [self.BaseArray.BaseRecord[i] for i in base_indices]
self.BaseArray.BaseCount = len(self.BaseArray.BaseRecord)
# Prune empty classes
class_indices = _uniq_sort(v.Class for v in self.MarkArray.MarkRecord)
self.ClassCount = len(class_indices)
for m in self.MarkArray.MarkRecord:
m.Class = class_indices.index(m.Class)
for b in self.BaseArray.BaseRecord:
b.BaseAnchor = [b.BaseAnchor[i] for i in class_indices]
return bool(self.ClassCount and
self.MarkArray.MarkCount and
self.BaseArray.BaseCount)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.MarkBasePos)
def prune_post_subset(self, options):
if not options.hinting:
for m in self.MarkArray.MarkRecord:
if m.MarkAnchor:
m.MarkAnchor.prune_hints()
for b in self.BaseArray.BaseRecord:
for a in b.BaseAnchor:
if a:
a.prune_hints()
return True
@_add_method(otTables.MarkLigPos)
def subset_glyphs(self, s):
if self.Format == 1:
mark_indices = self.MarkCoverage.subset(s.glyphs)
self.MarkArray.MarkRecord = [self.MarkArray.MarkRecord[i] for i in mark_indices]
self.MarkArray.MarkCount = len(self.MarkArray.MarkRecord)
ligature_indices = self.LigatureCoverage.subset(s.glyphs)
self.LigatureArray.LigatureAttach = [self.LigatureArray.LigatureAttach[i] for i in ligature_indices]
self.LigatureArray.LigatureCount = len(self.LigatureArray.LigatureAttach)
# Prune empty classes
class_indices = _uniq_sort(v.Class for v in self.MarkArray.MarkRecord)
self.ClassCount = len(class_indices)
for m in self.MarkArray.MarkRecord:
m.Class = class_indices.index(m.Class)
for l in self.LigatureArray.LigatureAttach:
for c in l.ComponentRecord:
c.LigatureAnchor = [c.LigatureAnchor[i] for i in class_indices]
return bool(self.ClassCount and
self.MarkArray.MarkCount and
self.LigatureArray.LigatureCount)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.MarkLigPos)
def prune_post_subset(self, options):
if not options.hinting:
for m in self.MarkArray.MarkRecord:
if m.MarkAnchor:
m.MarkAnchor.prune_hints()
for l in self.LigatureArray.LigatureAttach:
for c in l.ComponentRecord:
for a in c.LigatureAnchor:
if a:
a.prune_hints()
return True
@_add_method(otTables.MarkMarkPos)
def subset_glyphs(self, s):
if self.Format == 1:
mark1_indices = self.Mark1Coverage.subset(s.glyphs)
self.Mark1Array.MarkRecord = [self.Mark1Array.MarkRecord[i] for i in mark1_indices]
self.Mark1Array.MarkCount = len(self.Mark1Array.MarkRecord)
mark2_indices = self.Mark2Coverage.subset(s.glyphs)
self.Mark2Array.Mark2Record = [self.Mark2Array.Mark2Record[i] for i in mark2_indices]
self.Mark2Array.MarkCount = len(self.Mark2Array.Mark2Record)
# Prune empty classes
class_indices = _uniq_sort(v.Class for v in self.Mark1Array.MarkRecord)
self.ClassCount = len(class_indices)
for m in self.Mark1Array.MarkRecord:
m.Class = class_indices.index(m.Class)
for b in self.Mark2Array.Mark2Record:
b.Mark2Anchor = [b.Mark2Anchor[i] for i in class_indices]
return bool(self.ClassCount and
self.Mark1Array.MarkCount and
self.Mark2Array.MarkCount)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.MarkMarkPos)
def prune_post_subset(self, options):
if not options.hinting:
# Drop device tables or contour anchor point
for m in self.Mark1Array.MarkRecord:
if m.MarkAnchor:
m.MarkAnchor.prune_hints()
for b in self.Mark2Array.Mark2Record:
for m in b.Mark2Anchor:
if m:
m.prune_hints()
return True
@_add_method(otTables.SingleSubst,
otTables.MultipleSubst,
otTables.AlternateSubst,
otTables.LigatureSubst,
otTables.ReverseChainSingleSubst,
otTables.SinglePos,
otTables.PairPos,
otTables.CursivePos,
otTables.MarkBasePos,
otTables.MarkLigPos,
otTables.MarkMarkPos)
def subset_lookups(self, lookup_indices):
pass
@_add_method(otTables.SingleSubst,
otTables.MultipleSubst,
otTables.AlternateSubst,
otTables.LigatureSubst,
otTables.ReverseChainSingleSubst,
otTables.SinglePos,
otTables.PairPos,
otTables.CursivePos,
otTables.MarkBasePos,
otTables.MarkLigPos,
otTables.MarkMarkPos)
def collect_lookups(self):
return []
@_add_method(otTables.SingleSubst,
otTables.MultipleSubst,
otTables.AlternateSubst,
otTables.LigatureSubst,
otTables.ReverseChainSingleSubst,
otTables.ContextSubst,
otTables.ChainContextSubst,
otTables.ContextPos,
otTables.ChainContextPos)
def prune_post_subset(self, options):
return True
@_add_method(otTables.SingleSubst,
otTables.AlternateSubst,
otTables.ReverseChainSingleSubst)
def may_have_non_1to1(self):
return False
@_add_method(otTables.MultipleSubst,
otTables.LigatureSubst,
otTables.ContextSubst,
otTables.ChainContextSubst)
def may_have_non_1to1(self):
return True
@_add_method(otTables.ContextSubst,
otTables.ChainContextSubst,
otTables.ContextPos,
otTables.ChainContextPos)
def __subset_classify_context(self):
class ContextHelper(object):
def __init__(self, klass, Format):
if klass.__name__.endswith('Subst'):
Typ = 'Sub'
Type = 'Subst'
else:
Typ = 'Pos'
Type = 'Pos'
if klass.__name__.startswith('Chain'):
Chain = 'Chain'
InputIdx = 1
DataLen = 3
else:
Chain = ''
InputIdx = 0
DataLen = 1
ChainTyp = Chain+Typ
self.Typ = Typ
self.Type = Type
self.Chain = Chain
self.ChainTyp = ChainTyp
self.InputIdx = InputIdx
self.DataLen = DataLen
self.LookupRecord = Type+'LookupRecord'
if Format == 1:
Coverage = lambda r: r.Coverage
ChainCoverage = lambda r: r.Coverage
ContextData = lambda r:(None,)
ChainContextData = lambda r:(None, None, None)
SetContextData = None
SetChainContextData = None
RuleData = lambda r:(r.Input,)
ChainRuleData = lambda r:(r.Backtrack, r.Input, r.LookAhead)
def SetRuleData(r, d):
(r.Input,) = d
(r.GlyphCount,) = (len(x)+1 for x in d)
def ChainSetRuleData(r, d):
(r.Backtrack, r.Input, r.LookAhead) = d
(r.BacktrackGlyphCount,r.InputGlyphCount,r.LookAheadGlyphCount,) = (len(d[0]),len(d[1])+1,len(d[2]))
elif Format == 2:
Coverage = lambda r: r.Coverage
ChainCoverage = lambda r: r.Coverage
ContextData = lambda r:(r.ClassDef,)
ChainContextData = lambda r:(r.BacktrackClassDef,
r.InputClassDef,
r.LookAheadClassDef)
def SetContextData(r, d):
(r.ClassDef,) = d
def SetChainContextData(r, d):
(r.BacktrackClassDef,
r.InputClassDef,
r.LookAheadClassDef) = d
RuleData = lambda r:(r.Class,)
ChainRuleData = lambda r:(r.Backtrack, r.Input, r.LookAhead)
def SetRuleData(r, d):
(r.Class,) = d
(r.GlyphCount,) = (len(x)+1 for x in d)
def ChainSetRuleData(r, d):
(r.Backtrack, r.Input, r.LookAhead) = d
(r.BacktrackGlyphCount,r.InputGlyphCount,r.LookAheadGlyphCount,) = (len(d[0]),len(d[1])+1,len(d[2]))
elif Format == 3:
Coverage = lambda r: r.Coverage[0]
ChainCoverage = lambda r: r.InputCoverage[0]
ContextData = None
ChainContextData = None
SetContextData = None
SetChainContextData = None
RuleData = lambda r: r.Coverage
ChainRuleData = lambda r:(r.BacktrackCoverage +
r.InputCoverage +
r.LookAheadCoverage)
def SetRuleData(r, d):
(r.Coverage,) = d
(r.GlyphCount,) = (len(x) for x in d)
def ChainSetRuleData(r, d):
(r.BacktrackCoverage, r.InputCoverage, r.LookAheadCoverage) = d
(r.BacktrackGlyphCount,r.InputGlyphCount,r.LookAheadGlyphCount,) = (len(x) for x in d)
else:
assert 0, "unknown format: %s" % Format
if Chain:
self.Coverage = ChainCoverage
self.ContextData = ChainContextData
self.SetContextData = SetChainContextData
self.RuleData = ChainRuleData
self.SetRuleData = ChainSetRuleData
else:
self.Coverage = Coverage
self.ContextData = ContextData
self.SetContextData = SetContextData
self.RuleData = RuleData
self.SetRuleData = SetRuleData
if Format == 1:
self.Rule = ChainTyp+'Rule'
self.RuleCount = ChainTyp+'RuleCount'
self.RuleSet = ChainTyp+'RuleSet'
self.RuleSetCount = ChainTyp+'RuleSetCount'
self.Intersect = lambda glyphs, c, r: [r] if r in glyphs else []
elif Format == 2:
self.Rule = ChainTyp+'ClassRule'
self.RuleCount = ChainTyp+'ClassRuleCount'
self.RuleSet = ChainTyp+'ClassSet'
self.RuleSetCount = ChainTyp+'ClassSetCount'
self.Intersect = lambda glyphs, c, r: (c.intersect_class(glyphs, r) if c
else (set(glyphs) if r == 0 else set()))
self.ClassDef = 'InputClassDef' if Chain else 'ClassDef'
self.ClassDefIndex = 1 if Chain else 0
self.Input = 'Input' if Chain else 'Class'
if self.Format not in [1, 2, 3]:
return None # Don't shoot the messenger; let it go
if not hasattr(self.__class__, "__ContextHelpers"):
self.__class__.__ContextHelpers = {}
if self.Format not in self.__class__.__ContextHelpers:
helper = ContextHelper(self.__class__, self.Format)
self.__class__.__ContextHelpers[self.Format] = helper
return self.__class__.__ContextHelpers[self.Format]
@_add_method(otTables.ContextSubst,
otTables.ChainContextSubst)
def closure_glyphs(self, s, cur_glyphs):
c = self.__subset_classify_context()
indices = c.Coverage(self).intersect(cur_glyphs)
if not indices:
return []
cur_glyphs = c.Coverage(self).intersect_glyphs(cur_glyphs)
if self.Format == 1:
ContextData = c.ContextData(self)
rss = getattr(self, c.RuleSet)
rssCount = getattr(self, c.RuleSetCount)
for i in indices:
if i >= rssCount or not rss[i]: continue
for r in getattr(rss[i], c.Rule):
if not r: continue
if not all(all(c.Intersect(s.glyphs, cd, k) for k in klist)
for cd,klist in zip(ContextData, c.RuleData(r))):
continue
chaos = set()
for ll in getattr(r, c.LookupRecord):
if not ll: continue
seqi = ll.SequenceIndex
if seqi in chaos:
# TODO Can we improve this?
pos_glyphs = None
else:
if seqi == 0:
pos_glyphs = frozenset([c.Coverage(self).glyphs[i]])
else:
pos_glyphs = frozenset([r.Input[seqi - 1]])
lookup = s.table.LookupList.Lookup[ll.LookupListIndex]
chaos.add(seqi)
if lookup.may_have_non_1to1():
chaos.update(range(seqi, len(r.Input)+2))
lookup.closure_glyphs(s, cur_glyphs=pos_glyphs)
elif self.Format == 2:
ClassDef = getattr(self, c.ClassDef)
indices = ClassDef.intersect(cur_glyphs)
ContextData = c.ContextData(self)
rss = getattr(self, c.RuleSet)
rssCount = getattr(self, c.RuleSetCount)
for i in indices:
if i >= rssCount or not rss[i]: continue
for r in getattr(rss[i], c.Rule):
if not r: continue
if not all(all(c.Intersect(s.glyphs, cd, k) for k in klist)
for cd,klist in zip(ContextData, c.RuleData(r))):
continue
chaos = set()
for ll in getattr(r, c.LookupRecord):
if not ll: continue
seqi = ll.SequenceIndex
if seqi in chaos:
# TODO Can we improve this?
pos_glyphs = None
else:
if seqi == 0:
pos_glyphs = frozenset(ClassDef.intersect_class(cur_glyphs, i))
else:
pos_glyphs = frozenset(ClassDef.intersect_class(s.glyphs, getattr(r, c.Input)[seqi - 1]))
lookup = s.table.LookupList.Lookup[ll.LookupListIndex]
chaos.add(seqi)
if lookup.may_have_non_1to1():
chaos.update(range(seqi, len(getattr(r, c.Input))+2))
lookup.closure_glyphs(s, cur_glyphs=pos_glyphs)
elif self.Format == 3:
if not all(x.intersect(s.glyphs) for x in c.RuleData(self)):
return []
r = self
chaos = set()
for ll in getattr(r, c.LookupRecord):
if not ll: continue
seqi = ll.SequenceIndex
if seqi in chaos:
# TODO Can we improve this?
pos_glyphs = None
else:
if seqi == 0:
pos_glyphs = frozenset(cur_glyphs)
else:
pos_glyphs = frozenset(r.InputCoverage[seqi].intersect_glyphs(s.glyphs))
lookup = s.table.LookupList.Lookup[ll.LookupListIndex]
chaos.add(seqi)
if lookup.may_have_non_1to1():
chaos.update(range(seqi, len(r.InputCoverage)+1))
lookup.closure_glyphs(s, cur_glyphs=pos_glyphs)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ContextSubst,
otTables.ContextPos,
otTables.ChainContextSubst,
otTables.ChainContextPos)
def subset_glyphs(self, s):
c = self.__subset_classify_context()
if self.Format == 1:
indices = self.Coverage.subset(s.glyphs)
rss = getattr(self, c.RuleSet)
rssCount = getattr(self, c.RuleSetCount)
rss = [rss[i] for i in indices if i < rssCount]
for rs in rss:
if not rs: continue
ss = getattr(rs, c.Rule)
ss = [r for r in ss
if r and all(all(g in s.glyphs for g in glist)
for glist in c.RuleData(r))]
setattr(rs, c.Rule, ss)
setattr(rs, c.RuleCount, len(ss))
# Prune empty rulesets
indices = [i for i,rs in enumerate(rss) if rs and getattr(rs, c.Rule)]
self.Coverage.remap(indices)
rss = [rss[i] for i in indices]
setattr(self, c.RuleSet, rss)
setattr(self, c.RuleSetCount, len(rss))
return bool(rss)
elif self.Format == 2:
if not self.Coverage.subset(s.glyphs):
return False
ContextData = c.ContextData(self)
klass_maps = [x.subset(s.glyphs, remap=True) if x else None for x in ContextData]
# Keep rulesets for class numbers that survived.
indices = klass_maps[c.ClassDefIndex]
rss = getattr(self, c.RuleSet)
rssCount = getattr(self, c.RuleSetCount)
rss = [rss[i] for i in indices if i < rssCount]
del rssCount
# Delete, but not renumber, unreachable rulesets.
indices = getattr(self, c.ClassDef).intersect(self.Coverage.glyphs)
rss = [rss if i in indices else None for i,rss in enumerate(rss)]
for rs in rss:
if not rs: continue
ss = getattr(rs, c.Rule)
ss = [r for r in ss
if r and all(all(k in klass_map for k in klist)
for klass_map,klist in zip(klass_maps, c.RuleData(r)))]
setattr(rs, c.Rule, ss)
setattr(rs, c.RuleCount, len(ss))
# Remap rule classes
for r in ss:
c.SetRuleData(r, [[klass_map.index(k) for k in klist]
for klass_map,klist in zip(klass_maps, c.RuleData(r))])
# Prune empty rulesets
rss = [rs if rs and getattr(rs, c.Rule) else None for rs in rss]
while rss and rss[-1] is None:
del rss[-1]
setattr(self, c.RuleSet, rss)
setattr(self, c.RuleSetCount, len(rss))
# TODO: We can do a second round of remapping class values based
# on classes that are actually used in at least one rule. Right
# now we subset classes to c.glyphs only. Or better, rewrite
# the above to do that.
return bool(rss)
elif self.Format == 3:
return all(x.subset(s.glyphs) for x in c.RuleData(self))
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ContextSubst,
otTables.ChainContextSubst,
otTables.ContextPos,
otTables.ChainContextPos)
def subset_lookups(self, lookup_indices):
c = self.__subset_classify_context()
if self.Format in [1, 2]:
for rs in getattr(self, c.RuleSet):
if not rs: continue
for r in getattr(rs, c.Rule):
if not r: continue
setattr(r, c.LookupRecord,
[ll for ll in getattr(r, c.LookupRecord)
if ll and ll.LookupListIndex in lookup_indices])
for ll in getattr(r, c.LookupRecord):
if not ll: continue
ll.LookupListIndex = lookup_indices.index(ll.LookupListIndex)
elif self.Format == 3:
setattr(self, c.LookupRecord,
[ll for ll in getattr(self, c.LookupRecord)
if ll and ll.LookupListIndex in lookup_indices])
for ll in getattr(self, c.LookupRecord):
if not ll: continue
ll.LookupListIndex = lookup_indices.index(ll.LookupListIndex)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ContextSubst,
otTables.ChainContextSubst,
otTables.ContextPos,
otTables.ChainContextPos)
def collect_lookups(self):
c = self.__subset_classify_context()
if self.Format in [1, 2]:
return [ll.LookupListIndex
for rs in getattr(self, c.RuleSet) if rs
for r in getattr(rs, c.Rule) if r
for ll in getattr(r, c.LookupRecord) if ll]
elif self.Format == 3:
return [ll.LookupListIndex
for ll in getattr(self, c.LookupRecord) if ll]
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ExtensionSubst)
def closure_glyphs(self, s, cur_glyphs):
if self.Format == 1:
self.ExtSubTable.closure_glyphs(s, cur_glyphs)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ExtensionSubst)
def may_have_non_1to1(self):
if self.Format == 1:
return self.ExtSubTable.may_have_non_1to1()
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ExtensionSubst,
otTables.ExtensionPos)
def subset_glyphs(self, s):
if self.Format == 1:
return self.ExtSubTable.subset_glyphs(s)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ExtensionSubst,
otTables.ExtensionPos)
def prune_post_subset(self, options):
if self.Format == 1:
return self.ExtSubTable.prune_post_subset(options)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ExtensionSubst,
otTables.ExtensionPos)
def subset_lookups(self, lookup_indices):
if self.Format == 1:
return self.ExtSubTable.subset_lookups(lookup_indices)
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.ExtensionSubst,
otTables.ExtensionPos)
def collect_lookups(self):
if self.Format == 1:
return self.ExtSubTable.collect_lookups()
else:
assert 0, "unknown format: %s" % self.Format
@_add_method(otTables.Lookup)
def closure_glyphs(self, s, cur_glyphs=None):
if cur_glyphs is None:
cur_glyphs = frozenset(s.glyphs)
# Memoize
if (id(self), cur_glyphs) in s._doneLookups:
return
s._doneLookups.add((id(self), cur_glyphs))
if self in s._activeLookups:
raise Exception("Circular loop in lookup recursion")
s._activeLookups.append(self)
for st in self.SubTable:
if not st: continue
st.closure_glyphs(s, cur_glyphs)
assert(s._activeLookups[-1] == self)
del s._activeLookups[-1]
@_add_method(otTables.Lookup)
def subset_glyphs(self, s):
self.SubTable = [st for st in self.SubTable if st and st.subset_glyphs(s)]
self.SubTableCount = len(self.SubTable)
return bool(self.SubTableCount)
@_add_method(otTables.Lookup)
def prune_post_subset(self, options):
ret = False
for st in self.SubTable:
if not st: continue
if st.prune_post_subset(options): ret = True
return ret
@_add_method(otTables.Lookup)
def subset_lookups(self, lookup_indices):
for s in self.SubTable:
s.subset_lookups(lookup_indices)
@_add_method(otTables.Lookup)
def collect_lookups(self):
return _uniq_sort(sum((st.collect_lookups() for st in self.SubTable
if st), []))
@_add_method(otTables.Lookup)
def may_have_non_1to1(self):
return any(st.may_have_non_1to1() for st in self.SubTable if st)
@_add_method(otTables.LookupList)
def subset_glyphs(self, s):
"""Returns the indices of nonempty lookups."""
return [i for i,l in enumerate(self.Lookup) if l and l.subset_glyphs(s)]
@_add_method(otTables.LookupList)
def prune_post_subset(self, options):
ret = False
for l in self.Lookup:
if not l: continue
if l.prune_post_subset(options): ret = True
return ret
@_add_method(otTables.LookupList)
def subset_lookups(self, lookup_indices):
self.ensureDecompiled()
self.Lookup = [self.Lookup[i] for i in lookup_indices
if i < self.LookupCount]
self.LookupCount = len(self.Lookup)
for l in self.Lookup:
l.subset_lookups(lookup_indices)
@_add_method(otTables.LookupList)
def neuter_lookups(self, lookup_indices):
"""Sets lookups not in lookup_indices to None."""
self.ensureDecompiled()
self.Lookup = [l if i in lookup_indices else None for i,l in enumerate(self.Lookup)]
@_add_method(otTables.LookupList)
def closure_lookups(self, lookup_indices):
lookup_indices = _uniq_sort(lookup_indices)
recurse = lookup_indices
while True:
recurse_lookups = sum((self.Lookup[i].collect_lookups()
for i in recurse if i < self.LookupCount), [])
recurse_lookups = [l for l in recurse_lookups
if l not in lookup_indices and l < self.LookupCount]
if not recurse_lookups:
return _uniq_sort(lookup_indices)
recurse_lookups = _uniq_sort(recurse_lookups)
lookup_indices.extend(recurse_lookups)
recurse = recurse_lookups
@_add_method(otTables.Feature)
def subset_lookups(self, lookup_indices):
self.LookupListIndex = [l for l in self.LookupListIndex
if l in lookup_indices]
# Now map them.
self.LookupListIndex = [lookup_indices.index(l)
for l in self.LookupListIndex]
self.LookupCount = len(self.LookupListIndex)
return self.LookupCount or self.FeatureParams
@_add_method(otTables.Feature)
def collect_lookups(self):
return self.LookupListIndex[:]
@_add_method(otTables.FeatureList)
def subset_lookups(self, lookup_indices):
"""Returns the indices of nonempty features."""
# Note: Never ever drop feature 'pref', even if it's empty.
# HarfBuzz chooses shaper for Khmer based on presence of this
# feature. See thread at:
# http://lists.freedesktop.org/archives/harfbuzz/2012-November/002660.html
feature_indices = [i for i,f in enumerate(self.FeatureRecord)
if (f.Feature.subset_lookups(lookup_indices) or
f.FeatureTag == 'pref')]
self.subset_features(feature_indices)
return feature_indices
@_add_method(otTables.FeatureList)
def collect_lookups(self, feature_indices):
return _uniq_sort(sum((self.FeatureRecord[i].Feature.collect_lookups()
for i in feature_indices
if i < self.FeatureCount), []))
@_add_method(otTables.FeatureList)
def subset_features(self, feature_indices):
self.ensureDecompiled()
self.FeatureRecord = [self.FeatureRecord[i] for i in feature_indices]
self.FeatureCount = len(self.FeatureRecord)
return bool(self.FeatureCount)
@_add_method(otTables.DefaultLangSys,
otTables.LangSys)
def subset_features(self, feature_indices):
if self.ReqFeatureIndex in feature_indices:
self.ReqFeatureIndex = feature_indices.index(self.ReqFeatureIndex)
else:
self.ReqFeatureIndex = 65535
self.FeatureIndex = [f for f in self.FeatureIndex if f in feature_indices]
# Now map them.
self.FeatureIndex = [feature_indices.index(f) for f in self.FeatureIndex
if f in feature_indices]
self.FeatureCount = len(self.FeatureIndex)
return bool(self.FeatureCount or self.ReqFeatureIndex != 65535)
@_add_method(otTables.DefaultLangSys,
otTables.LangSys)
def collect_features(self):
feature_indices = self.FeatureIndex[:]
if self.ReqFeatureIndex != 65535:
feature_indices.append(self.ReqFeatureIndex)
return _uniq_sort(feature_indices)
@_add_method(otTables.Script)
def subset_features(self, feature_indices):
if(self.DefaultLangSys and
not self.DefaultLangSys.subset_features(feature_indices)):
self.DefaultLangSys = None
self.LangSysRecord = [l for l in self.LangSysRecord
if l.LangSys.subset_features(feature_indices)]
self.LangSysCount = len(self.LangSysRecord)
return bool(self.LangSysCount or self.DefaultLangSys)
@_add_method(otTables.Script)
def collect_features(self):
feature_indices = [l.LangSys.collect_features() for l in self.LangSysRecord]
if self.DefaultLangSys:
feature_indices.append(self.DefaultLangSys.collect_features())
return _uniq_sort(sum(feature_indices, []))
@_add_method(otTables.ScriptList)
def subset_features(self, feature_indices, retain_empty):
self.ScriptRecord = [s for s in self.ScriptRecord
if s.Script.subset_features(feature_indices) or retain_empty]
self.ScriptCount = len(self.ScriptRecord)
return bool(self.ScriptCount)
@_add_method(otTables.ScriptList)
def collect_features(self):
return _uniq_sort(sum((s.Script.collect_features()
for s in self.ScriptRecord), []))
# CBLC will inherit it
@_add_method(ttLib.getTableClass('EBLC'))
def subset_glyphs(self, s):
for strike in self.strikes:
for indexSubTable in strike.indexSubTables:
indexSubTable.names = [n for n in indexSubTable.names if n in s.glyphs]
strike.indexSubTables = [i for i in strike.indexSubTables if i.names]
self.strikes = [s for s in self.strikes if s.indexSubTables]
return True
# CBDC will inherit it
@_add_method(ttLib.getTableClass('EBDT'))
def subset_glyphs(self, s):
self.strikeData = [{g: strike[g] for g in s.glyphs if g in strike}
for strike in self.strikeData]
return True
@_add_method(ttLib.getTableClass('GSUB'))
def closure_glyphs(self, s):
s.table = self.table
if self.table.ScriptList:
feature_indices = self.table.ScriptList.collect_features()
else:
feature_indices = []
if self.table.FeatureList:
lookup_indices = self.table.FeatureList.collect_lookups(feature_indices)
else:
lookup_indices = []
if self.table.LookupList:
while True:
orig_glyphs = frozenset(s.glyphs)
s._activeLookups = []
s._doneLookups = set()
for i in lookup_indices:
if i >= self.table.LookupList.LookupCount: continue
if not self.table.LookupList.Lookup[i]: continue
self.table.LookupList.Lookup[i].closure_glyphs(s)
del s._activeLookups, s._doneLookups
if orig_glyphs == s.glyphs:
break
del s.table
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def subset_glyphs(self, s):
s.glyphs = s.glyphs_gsubed
if self.table.LookupList:
lookup_indices = self.table.LookupList.subset_glyphs(s)
else:
lookup_indices = []
self.subset_lookups(lookup_indices)
return True
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def retain_empty_scripts(self):
# https://github.com/behdad/fonttools/issues/518
# https://bugzilla.mozilla.org/show_bug.cgi?id=1080739#c15
return self.__class__ == ttLib.getTableClass('GSUB')
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def subset_lookups(self, lookup_indices):
"""Retains specified lookups, then removes empty features, language
systems, and scripts."""
if self.table.LookupList:
self.table.LookupList.subset_lookups(lookup_indices)
if self.table.FeatureList:
feature_indices = self.table.FeatureList.subset_lookups(lookup_indices)
else:
feature_indices = []
if self.table.ScriptList:
self.table.ScriptList.subset_features(feature_indices, self.retain_empty_scripts())
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def neuter_lookups(self, lookup_indices):
"""Sets lookups not in lookup_indices to None."""
if self.table.LookupList:
self.table.LookupList.neuter_lookups(lookup_indices)
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def prune_lookups(self, remap=True):
"""Remove (default) or neuter unreferenced lookups"""
if self.table.ScriptList:
feature_indices = self.table.ScriptList.collect_features()
else:
feature_indices = []
if self.table.FeatureList:
lookup_indices = self.table.FeatureList.collect_lookups(feature_indices)
else:
lookup_indices = []
if self.table.LookupList:
lookup_indices = self.table.LookupList.closure_lookups(lookup_indices)
else:
lookup_indices = []
if remap:
self.subset_lookups(lookup_indices)
else:
self.neuter_lookups(lookup_indices)
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def subset_feature_tags(self, feature_tags):
if self.table.FeatureList:
feature_indices = \
[i for i,f in enumerate(self.table.FeatureList.FeatureRecord)
if f.FeatureTag in feature_tags]
self.table.FeatureList.subset_features(feature_indices)
else:
feature_indices = []
if self.table.ScriptList:
self.table.ScriptList.subset_features(feature_indices, self.retain_empty_scripts())
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def prune_features(self):
"""Remove unreferenced features"""
if self.table.ScriptList:
feature_indices = self.table.ScriptList.collect_features()
else:
feature_indices = []
if self.table.FeatureList:
self.table.FeatureList.subset_features(feature_indices)
if self.table.ScriptList:
self.table.ScriptList.subset_features(feature_indices, self.retain_empty_scripts())
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def prune_pre_subset(self, font, options):
# Drop undesired features
if '*' not in options.layout_features:
self.subset_feature_tags(options.layout_features)
# Neuter unreferenced lookups
self.prune_lookups(remap=False)
return True
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def remove_redundant_langsys(self):
table = self.table
if not table.ScriptList or not table.FeatureList:
return
features = table.FeatureList.FeatureRecord
for s in table.ScriptList.ScriptRecord:
d = s.Script.DefaultLangSys
if not d:
continue
for lr in s.Script.LangSysRecord[:]:
l = lr.LangSys
# Compare d and l
if len(d.FeatureIndex) != len(l.FeatureIndex):
continue
if (d.ReqFeatureIndex == 65535) != (l.ReqFeatureIndex == 65535):
continue
if d.ReqFeatureIndex != 65535:
if features[d.ReqFeatureIndex] != features[l.ReqFeatureIndex]:
continue
for i in range(len(d.FeatureIndex)):
if features[d.FeatureIndex[i]] != features[l.FeatureIndex[i]]:
break
else:
# LangSys and default are equal; delete LangSys
s.Script.LangSysRecord.remove(lr)
@_add_method(ttLib.getTableClass('GSUB'),
ttLib.getTableClass('GPOS'))
def prune_post_subset(self, options):
table = self.table
self.prune_lookups() # XXX Is this actually needed?!
if table.LookupList:
table.LookupList.prune_post_subset(options)
# XXX Next two lines disabled because OTS is stupid and
# doesn't like NULL offsets here.
#if not table.LookupList.Lookup:
# table.LookupList = None
if not table.LookupList:
table.FeatureList = None
if table.FeatureList:
self.remove_redundant_langsys()
# Remove unreferenced features
self.prune_features()
# XXX Next two lines disabled because OTS is stupid and
# doesn't like NULL offsets here.
#if table.FeatureList and not table.FeatureList.FeatureRecord:
# table.FeatureList = None
# Never drop scripts themselves as them just being available
# holds semantic significance.
# XXX Next two lines disabled because OTS is stupid and
# doesn't like NULL offsets here.
#if table.ScriptList and not table.ScriptList.ScriptRecord:
# table.ScriptList = None
return True
@_add_method(ttLib.getTableClass('GDEF'))
def subset_glyphs(self, s):
glyphs = s.glyphs_gsubed
table = self.table
if table.LigCaretList:
indices = table.LigCaretList.Coverage.subset(glyphs)
table.LigCaretList.LigGlyph = [table.LigCaretList.LigGlyph[i] for i in indices]
table.LigCaretList.LigGlyphCount = len(table.LigCaretList.LigGlyph)
if table.MarkAttachClassDef:
table.MarkAttachClassDef.classDefs = \
{g:v for g,v in table.MarkAttachClassDef.classDefs.items()
if g in glyphs}
if table.GlyphClassDef:
table.GlyphClassDef.classDefs = \
{g:v for g,v in table.GlyphClassDef.classDefs.items()
if g in glyphs}
if table.AttachList:
indices = table.AttachList.Coverage.subset(glyphs)
GlyphCount = table.AttachList.GlyphCount
table.AttachList.AttachPoint = [table.AttachList.AttachPoint[i]
for i in indices if i < GlyphCount]
table.AttachList.GlyphCount = len(table.AttachList.AttachPoint)
if hasattr(table, "MarkGlyphSetsDef") and table.MarkGlyphSetsDef:
for coverage in table.MarkGlyphSetsDef.Coverage:
coverage.subset(glyphs)
# TODO: The following is disabled. If enabling, we need to go fixup all
# lookups that use MarkFilteringSet and map their set.
# indices = table.MarkGlyphSetsDef.Coverage = \
# [c for c in table.MarkGlyphSetsDef.Coverage if c.glyphs]
return True
@_add_method(ttLib.getTableClass('GDEF'))
def prune_post_subset(self, options):
table = self.table
# XXX check these against OTS
if table.LigCaretList and not table.LigCaretList.LigGlyphCount:
table.LigCaretList = None
if table.MarkAttachClassDef and not table.MarkAttachClassDef.classDefs:
table.MarkAttachClassDef = None
if table.GlyphClassDef and not table.GlyphClassDef.classDefs:
table.GlyphClassDef = None
if table.AttachList and not table.AttachList.GlyphCount:
table.AttachList = None
if (hasattr(table, "MarkGlyphSetsDef") and
table.MarkGlyphSetsDef and
not table.MarkGlyphSetsDef.Coverage):
table.MarkGlyphSetsDef = None
if table.Version == 0x00010002:
table.Version = 0x00010000
return bool(table.LigCaretList or
table.MarkAttachClassDef or
table.GlyphClassDef or
table.AttachList or
(table.Version >= 0x00010002 and table.MarkGlyphSetsDef))
@_add_method(ttLib.getTableClass('kern'))
def prune_pre_subset(self, font, options):
# Prune unknown kern table types
self.kernTables = [t for t in self.kernTables if hasattr(t, 'kernTable')]
return bool(self.kernTables)
@_add_method(ttLib.getTableClass('kern'))
def subset_glyphs(self, s):
glyphs = s.glyphs_gsubed
for t in self.kernTables:
t.kernTable = {(a,b):v for (a,b),v in t.kernTable.items()
if a in glyphs and b in glyphs}
self.kernTables = [t for t in self.kernTables if t.kernTable]
return bool(self.kernTables)
@_add_method(ttLib.getTableClass('vmtx'))
def subset_glyphs(self, s):
self.metrics = _dict_subset(self.metrics, s.glyphs)
return bool(self.metrics)
@_add_method(ttLib.getTableClass('hmtx'))
def subset_glyphs(self, s):
self.metrics = _dict_subset(self.metrics, s.glyphs)
return True # Required table
@_add_method(ttLib.getTableClass('hdmx'))
def subset_glyphs(self, s):
self.hdmx = {sz:_dict_subset(l, s.glyphs) for sz,l in self.hdmx.items()}
return bool(self.hdmx)
@_add_method(ttLib.getTableClass('gvar'))
def prune_pre_subset(self, font, options):
if options.notdef_glyph and not options.notdef_outline:
self.variations[font.glyphOrder[0]] = []
return True
@_add_method(ttLib.getTableClass('gvar'))
def subset_glyphs(self, s):
self.variations = _dict_subset(self.variations, s.glyphs)
self.glyphCount = len(self.variations)
return bool(self.variations)
@_add_method(ttLib.getTableClass('VORG'))
def subset_glyphs(self, s):
self.VOriginRecords = {g:v for g,v in self.VOriginRecords.items()
if g in s.glyphs}
self.numVertOriginYMetrics = len(self.VOriginRecords)
return True # Never drop; has default metrics
@_add_method(ttLib.getTableClass('post'))
def prune_pre_subset(self, font, options):
if not options.glyph_names:
self.formatType = 3.0
return True # Required table
@_add_method(ttLib.getTableClass('post'))
def subset_glyphs(self, s):
self.extraNames = [] # This seems to do it
return True # Required table
@_add_method(ttLib.getTableClass('COLR'))
def closure_glyphs(self, s):
decompose = s.glyphs
while True:
layers = set()
for g in decompose:
if g not in self.ColorLayers:
continue
for l in self.ColorLayers[g]:
if l.name not in s.glyphs:
layers.add(l.name)
layers = set(l for l in layers if l not in s.glyphs)
if not layers:
break
decompose = layers
s.glyphs.update(layers)
@_add_method(ttLib.getTableClass('COLR'))
def subset_glyphs(self, s):
self.ColorLayers = {g: self.ColorLayers[g] for g in s.glyphs if g in self.ColorLayers}
return bool(self.ColorLayers)
# TODO: prune unused palettes
@_add_method(ttLib.getTableClass('CPAL'))
def prune_post_subset(self, options):
return True
@_add_method(otTables.MathGlyphConstruction)
def closure_glyphs(self, glyphs):
variants = set()
for v in self.MathGlyphVariantRecord:
variants.add(v.VariantGlyph)
if self.GlyphAssembly:
for p in self.GlyphAssembly.PartRecords:
variants.add(p.glyph)
return variants
@_add_method(otTables.MathVariants)
def closure_glyphs(self, s):
glyphs = frozenset(s.glyphs)
variants = set()
if self.VertGlyphCoverage:
indices = self.VertGlyphCoverage.intersect(glyphs)
for i in indices:
variants.update(self.VertGlyphConstruction[i].closure_glyphs(glyphs))
if self.HorizGlyphCoverage:
indices = self.HorizGlyphCoverage.intersect(glyphs)
for i in indices:
variants.update(self.HorizGlyphConstruction[i].closure_glyphs(glyphs))
s.glyphs.update(variants)
@_add_method(ttLib.getTableClass('MATH'))
def closure_glyphs(self, s):
self.table.MathVariants.closure_glyphs(s)
@_add_method(otTables.MathItalicsCorrectionInfo)
def subset_glyphs(self, s):
indices = self.Coverage.subset(s.glyphs)
self.ItalicsCorrection = [self.ItalicsCorrection[i] for i in indices]
self.ItalicsCorrectionCount = len(self.ItalicsCorrection)
return bool(self.ItalicsCorrectionCount)
@_add_method(otTables.MathTopAccentAttachment)
def subset_glyphs(self, s):
indices = self.TopAccentCoverage.subset(s.glyphs)
self.TopAccentAttachment = [self.TopAccentAttachment[i] for i in indices]
self.TopAccentAttachmentCount = len(self.TopAccentAttachment)
return bool(self.TopAccentAttachmentCount)
@_add_method(otTables.MathKernInfo)
def subset_glyphs(self, s):
indices = self.MathKernCoverage.subset(s.glyphs)
self.MathKernInfoRecords = [self.MathKernInfoRecords[i] for i in indices]
self.MathKernCount = len(self.MathKernInfoRecords)
return bool(self.MathKernCount)
@_add_method(otTables.MathGlyphInfo)
def subset_glyphs(self, s):
if self.MathItalicsCorrectionInfo:
self.MathItalicsCorrectionInfo.subset_glyphs(s)
if self.MathTopAccentAttachment:
self.MathTopAccentAttachment.subset_glyphs(s)
if self.MathKernInfo:
self.MathKernInfo.subset_glyphs(s)
if self.ExtendedShapeCoverage:
self.ExtendedShapeCoverage.subset(s.glyphs)
return True
@_add_method(otTables.MathVariants)
def subset_glyphs(self, s):
if self.VertGlyphCoverage:
indices = self.VertGlyphCoverage.subset(s.glyphs)
self.VertGlyphConstruction = [self.VertGlyphConstruction[i] for i in indices]
self.VertGlyphCount = len(self.VertGlyphConstruction)
if self.HorizGlyphCoverage:
indices = self.HorizGlyphCoverage.subset(s.glyphs)
self.HorizGlyphConstruction = [self.HorizGlyphConstruction[i] for i in indices]
self.HorizGlyphCount = len(self.HorizGlyphConstruction)
return True
@_add_method(ttLib.getTableClass('MATH'))
def subset_glyphs(self, s):
s.glyphs = s.glyphs_mathed
self.table.MathGlyphInfo.subset_glyphs(s)
self.table.MathVariants.subset_glyphs(s)
return True
@_add_method(ttLib.getTableModule('glyf').Glyph)
def remapComponentsFast(self, indices):
if not self.data or struct.unpack(">h", self.data[:2])[0] >= 0:
return # Not composite
data = array.array("B", self.data)
i = 10
more = 1
while more:
flags =(data[i] << 8) | data[i+1]
glyphID =(data[i+2] << 8) | data[i+3]
# Remap
glyphID = indices.index(glyphID)
data[i+2] = glyphID >> 8
data[i+3] = glyphID & 0xFF
i += 4
flags = int(flags)
if flags & 0x0001: i += 4 # ARG_1_AND_2_ARE_WORDS
else: i += 2
if flags & 0x0008: i += 2 # WE_HAVE_A_SCALE
elif flags & 0x0040: i += 4 # WE_HAVE_AN_X_AND_Y_SCALE
elif flags & 0x0080: i += 8 # WE_HAVE_A_TWO_BY_TWO
more = flags & 0x0020 # MORE_COMPONENTS
self.data = data.tostring()
@_add_method(ttLib.getTableClass('glyf'))
def closure_glyphs(self, s):
decompose = s.glyphs
while True:
components = set()
for g in decompose:
if g not in self.glyphs:
continue
gl = self.glyphs[g]
for c in gl.getComponentNames(self):
if c not in s.glyphs:
components.add(c)
components = set(c for c in components if c not in s.glyphs)
if not components:
break
decompose = components
s.glyphs.update(components)
@_add_method(ttLib.getTableClass('glyf'))
def prune_pre_subset(self, font, options):
if options.notdef_glyph and not options.notdef_outline:
g = self[self.glyphOrder[0]]
# Yay, easy!
g.__dict__.clear()
g.data = ""
return True
@_add_method(ttLib.getTableClass('glyf'))
def subset_glyphs(self, s):
self.glyphs = _dict_subset(self.glyphs, s.glyphs)
indices = [i for i,g in enumerate(self.glyphOrder) if g in s.glyphs]
for v in self.glyphs.values():
if hasattr(v, "data"):
v.remapComponentsFast(indices)
else:
pass # No need
self.glyphOrder = [g for g in self.glyphOrder if g in s.glyphs]
# Don't drop empty 'glyf' tables, otherwise 'loca' doesn't get subset.
return True
@_add_method(ttLib.getTableClass('glyf'))
def prune_post_subset(self, options):
remove_hinting = not options.hinting
for v in self.glyphs.values():
v.trim(remove_hinting=remove_hinting)
return True
@_add_method(ttLib.getTableClass('CFF '))
def prune_pre_subset(self, font, options):
cff = self.cff
# CFF table must have one font only
cff.fontNames = cff.fontNames[:1]
if options.notdef_glyph and not options.notdef_outline:
for fontname in cff.keys():
font = cff[fontname]
c,sel = font.CharStrings.getItemAndSelector('.notdef')
if hasattr(font, 'FDArray') and font.FDArray is not None:
private = font.FDArray[font.FDSelect[sel]].Private
else:
private = font.Private
dfltWdX = private.defaultWidthX
nmnlWdX = private.nominalWidthX
pen = BoundsPen(None)
c.draw(pen) # this will set the charstring's width
if c.width != dfltWdX:
c.program = [c.width - nmnlWdX, 'endchar']
else:
c.program = ['endchar']
# Clear useless Encoding
for fontname in cff.keys():
font = cff[fontname]
# https://github.com/behdad/fonttools/issues/620
font.Encoding = "StandardEncoding"
return True # bool(cff.fontNames)
@_add_method(ttLib.getTableClass('CFF '))
def subset_glyphs(self, s):
cff = self.cff
for fontname in cff.keys():
font = cff[fontname]
cs = font.CharStrings
# Load all glyphs
for g in font.charset:
if g not in s.glyphs: continue
c,sel = cs.getItemAndSelector(g)
if cs.charStringsAreIndexed:
indices = [i for i,g in enumerate(font.charset) if g in s.glyphs]
csi = cs.charStringsIndex
csi.items = [csi.items[i] for i in indices]
del csi.file, csi.offsets
if hasattr(font, "FDSelect"):
sel = font.FDSelect
# XXX We want to set sel.format to None, such that the
# most compact format is selected. However, OTS was
# broken and couldn't parse a FDSelect format 0 that
# happened before CharStrings. As such, always force
# format 3 until we fix cffLib to always generate
# FDSelect after CharStrings.
# https://github.com/khaledhosny/ots/pull/31
#sel.format = None
sel.format = 3
sel.gidArray = [sel.gidArray[i] for i in indices]
cs.charStrings = {g:indices.index(v)
for g,v in cs.charStrings.items()
if g in s.glyphs}
else:
cs.charStrings = {g:v
for g,v in cs.charStrings.items()
if g in s.glyphs}
font.charset = [g for g in font.charset if g in s.glyphs]
font.numGlyphs = len(font.charset)
return True # any(cff[fontname].numGlyphs for fontname in cff.keys())
@_add_method(psCharStrings.T2CharString)
def subset_subroutines(self, subrs, gsubrs):
p = self.program
assert len(p)
for i in range(1, len(p)):
if p[i] == 'callsubr':
assert isinstance(p[i-1], int)
p[i-1] = subrs._used.index(p[i-1] + subrs._old_bias) - subrs._new_bias
elif p[i] == 'callgsubr':
assert isinstance(p[i-1], int)
p[i-1] = gsubrs._used.index(p[i-1] + gsubrs._old_bias) - gsubrs._new_bias
@_add_method(psCharStrings.T2CharString)
def drop_hints(self):
hints = self._hints
if hints.has_hint:
self.program = self.program[hints.last_hint:]
if hasattr(self, 'width'):
# Insert width back if needed
if self.width != self.private.defaultWidthX:
self.program.insert(0, self.width - self.private.nominalWidthX)
if hints.has_hintmask:
i = 0
p = self.program
while i < len(p):
if p[i] in ['hintmask', 'cntrmask']:
assert i + 1 <= len(p)
del p[i:i+2]
continue
i += 1
# TODO: we currently don't drop calls to "empty" subroutines.
assert len(self.program)
del self._hints
class _MarkingT2Decompiler(psCharStrings.SimpleT2Decompiler):
def __init__(self, localSubrs, globalSubrs):
psCharStrings.SimpleT2Decompiler.__init__(self,
localSubrs,
globalSubrs)
for subrs in [localSubrs, globalSubrs]:
if subrs and not hasattr(subrs, "_used"):
subrs._used = set()
def op_callsubr(self, index):
self.localSubrs._used.add(self.operandStack[-1]+self.localBias)
psCharStrings.SimpleT2Decompiler.op_callsubr(self, index)
def op_callgsubr(self, index):
self.globalSubrs._used.add(self.operandStack[-1]+self.globalBias)
psCharStrings.SimpleT2Decompiler.op_callgsubr(self, index)
class _DehintingT2Decompiler(psCharStrings.SimpleT2Decompiler):
class Hints(object):
def __init__(self):
# Whether calling this charstring produces any hint stems
self.has_hint = False
# Index to start at to drop all hints
self.last_hint = 0
# Index up to which we know more hints are possible.
# Only relevant if status is 0 or 1.
self.last_checked = 0
# The status means:
# 0: after dropping hints, this charstring is empty
# 1: after dropping hints, there may be more hints
# continuing after this
# 2: no more hints possible after this charstring
self.status = 0
# Has hintmask instructions; not recursive
self.has_hintmask = False
pass
def __init__(self, css, localSubrs, globalSubrs):
self._css = css
psCharStrings.SimpleT2Decompiler.__init__(self,
localSubrs,
globalSubrs)
def execute(self, charString):
old_hints = charString._hints if hasattr(charString, '_hints') else None
charString._hints = self.Hints()
psCharStrings.SimpleT2Decompiler.execute(self, charString)
hints = charString._hints
if hints.has_hint or hints.has_hintmask:
self._css.add(charString)
if hints.status != 2:
# Check from last_check, make sure we didn't have any operators.
for i in range(hints.last_checked, len(charString.program) - 1):
if isinstance(charString.program[i], str):
hints.status = 2
break
else:
hints.status = 1 # There's *something* here
hints.last_checked = len(charString.program)
if old_hints:
assert hints.__dict__ == old_hints.__dict__
def op_callsubr(self, index):
subr = self.localSubrs[self.operandStack[-1]+self.localBias]
psCharStrings.SimpleT2Decompiler.op_callsubr(self, index)
self.processSubr(index, subr)
def op_callgsubr(self, index):
subr = self.globalSubrs[self.operandStack[-1]+self.globalBias]
psCharStrings.SimpleT2Decompiler.op_callgsubr(self, index)
self.processSubr(index, subr)
def op_hstem(self, index):
psCharStrings.SimpleT2Decompiler.op_hstem(self, index)
self.processHint(index)
def op_vstem(self, index):
psCharStrings.SimpleT2Decompiler.op_vstem(self, index)
self.processHint(index)
def op_hstemhm(self, index):
psCharStrings.SimpleT2Decompiler.op_hstemhm(self, index)
self.processHint(index)
def op_vstemhm(self, index):
psCharStrings.SimpleT2Decompiler.op_vstemhm(self, index)
self.processHint(index)
def op_hintmask(self, index):
psCharStrings.SimpleT2Decompiler.op_hintmask(self, index)
self.processHintmask(index)
def op_cntrmask(self, index):
psCharStrings.SimpleT2Decompiler.op_cntrmask(self, index)
self.processHintmask(index)
def processHintmask(self, index):
cs = self.callingStack[-1]
hints = cs._hints
hints.has_hintmask = True
if hints.status != 2 and hints.has_hint:
# Check from last_check, see if we may be an implicit vstem
for i in range(hints.last_checked, index - 1):
if isinstance(cs.program[i], str):
hints.status = 2
break
if hints.status != 2:
# We are an implicit vstem
hints.last_hint = index + 1
hints.status = 0
hints.last_checked = index + 1
def processHint(self, index):
cs = self.callingStack[-1]
hints = cs._hints
hints.has_hint = True
hints.last_hint = index
hints.last_checked = index
def processSubr(self, index, subr):
cs = self.callingStack[-1]
hints = cs._hints
subr_hints = subr._hints
if subr_hints.has_hint:
if hints.status != 2:
hints.has_hint = True
hints.last_checked = index
hints.status = subr_hints.status
# Decide where to chop off from
if subr_hints.status == 0:
hints.last_hint = index
else:
hints.last_hint = index - 2 # Leave the subr call in
else:
# In my understanding, this is a font bug.
# I.e., it has hint stems *after* path construction.
# I've seen this in widespread fonts.
# Best to ignore the hints I suppose...
pass
#assert 0
else:
hints.status = max(hints.status, subr_hints.status)
if hints.status != 2:
# Check from last_check, make sure we didn't have
# any operators.
for i in range(hints.last_checked, index - 1):
if isinstance(cs.program[i], str):
hints.status = 2
break
hints.last_checked = index
if hints.status != 2:
# Decide where to chop off from
if subr_hints.status == 0:
hints.last_hint = index
else:
hints.last_hint = index - 2 # Leave the subr call in
class _DesubroutinizingT2Decompiler(psCharStrings.SimpleT2Decompiler):
def __init__(self, localSubrs, globalSubrs):
psCharStrings.SimpleT2Decompiler.__init__(self,
localSubrs,
globalSubrs)
def execute(self, charString):
# Note: Currently we recompute _desubroutinized each time.
# This is more robust in some cases, but in other places we assume
# that each subroutine always expands to the same code, so
# maybe it doesn't matter. To speed up we can just not
# recompute _desubroutinized if it's there. For now I just
# double-check that it desubroutinized to the same thing.
old_desubroutinized = charString._desubroutinized if hasattr(charString, '_desubroutinized') else None
charString._patches = []
psCharStrings.SimpleT2Decompiler.execute(self, charString)
desubroutinized = charString.program[:]
for idx,expansion in reversed (charString._patches):
assert idx >= 2
assert desubroutinized[idx - 1] in ['callsubr', 'callgsubr'], desubroutinized[idx - 1]
assert type(desubroutinized[idx - 2]) == int
if expansion[-1] == 'return':
expansion = expansion[:-1]
desubroutinized[idx-2:idx] = expansion
if 'endchar' in desubroutinized:
# Cut off after first endchar
desubroutinized = desubroutinized[:desubroutinized.index('endchar') + 1]
else:
if not len(desubroutinized) or desubroutinized[-1] != 'return':
desubroutinized.append('return')
charString._desubroutinized = desubroutinized
del charString._patches
if old_desubroutinized:
assert desubroutinized == old_desubroutinized
def op_callsubr(self, index):
subr = self.localSubrs[self.operandStack[-1]+self.localBias]
psCharStrings.SimpleT2Decompiler.op_callsubr(self, index)
self.processSubr(index, subr)
def op_callgsubr(self, index):
subr = self.globalSubrs[self.operandStack[-1]+self.globalBias]
psCharStrings.SimpleT2Decompiler.op_callgsubr(self, index)
self.processSubr(index, subr)
def processSubr(self, index, subr):
cs = self.callingStack[-1]
cs._patches.append((index, subr._desubroutinized))
@_add_method(ttLib.getTableClass('CFF '))
def prune_post_subset(self, options):
cff = self.cff
for fontname in cff.keys():
font = cff[fontname]
cs = font.CharStrings
# Drop unused FontDictionaries
if hasattr(font, "FDSelect"):
sel = font.FDSelect
indices = _uniq_sort(sel.gidArray)
sel.gidArray = [indices.index (ss) for ss in sel.gidArray]
arr = font.FDArray
arr.items = [arr[i] for i in indices]
del arr.file, arr.offsets
# Desubroutinize if asked for
if options.desubroutinize:
for g in font.charset:
c,sel = cs.getItemAndSelector(g)
c.decompile()
subrs = getattr(c.private, "Subrs", [])
decompiler = _DesubroutinizingT2Decompiler(subrs, c.globalSubrs)
decompiler.execute(c)
c.program = c._desubroutinized
# Drop hints if not needed
if not options.hinting:
# This can be tricky, but doesn't have to. What we do is:
#
# - Run all used glyph charstrings and recurse into subroutines,
# - For each charstring (including subroutines), if it has any
# of the hint stem operators, we mark it as such.
# Upon returning, for each charstring we note all the
# subroutine calls it makes that (recursively) contain a stem,
# - Dropping hinting then consists of the following two ops:
# * Drop the piece of the program in each charstring before the
# last call to a stem op or a stem-calling subroutine,
# * Drop all hintmask operations.
# - It's trickier... A hintmask right after hints and a few numbers
# will act as an implicit vstemhm. As such, we track whether
# we have seen any non-hint operators so far and do the right
# thing, recursively... Good luck understanding that :(
css = set()
for g in font.charset:
c,sel = cs.getItemAndSelector(g)
c.decompile()
subrs = getattr(c.private, "Subrs", [])
decompiler = _DehintingT2Decompiler(css, subrs, c.globalSubrs)
decompiler.execute(c)
for charstring in css:
charstring.drop_hints()
del css
# Drop font-wide hinting values
all_privs = []
if hasattr(font, 'FDSelect'):
all_privs.extend(fd.Private for fd in font.FDArray)
else:
all_privs.append(font.Private)
for priv in all_privs:
for k in ['BlueValues', 'OtherBlues',
'FamilyBlues', 'FamilyOtherBlues',
'BlueScale', 'BlueShift', 'BlueFuzz',
'StemSnapH', 'StemSnapV', 'StdHW', 'StdVW']:
if hasattr(priv, k):
setattr(priv, k, None)
# Renumber subroutines to remove unused ones
# Mark all used subroutines
for g in font.charset:
c,sel = cs.getItemAndSelector(g)
subrs = getattr(c.private, "Subrs", [])
decompiler = _MarkingT2Decompiler(subrs, c.globalSubrs)
decompiler.execute(c)
all_subrs = [font.GlobalSubrs]
if hasattr(font, 'FDSelect'):
all_subrs.extend(fd.Private.Subrs for fd in font.FDArray if hasattr(fd.Private, 'Subrs') and fd.Private.Subrs)
elif hasattr(font.Private, 'Subrs') and font.Private.Subrs:
all_subrs.append(font.Private.Subrs)
subrs = set(subrs) # Remove duplicates
# Prepare
for subrs in all_subrs:
if not hasattr(subrs, '_used'):
subrs._used = set()
subrs._used = _uniq_sort(subrs._used)
subrs._old_bias = psCharStrings.calcSubrBias(subrs)
subrs._new_bias = psCharStrings.calcSubrBias(subrs._used)
# Renumber glyph charstrings
for g in font.charset:
c,sel = cs.getItemAndSelector(g)
subrs = getattr(c.private, "Subrs", [])
c.subset_subroutines (subrs, font.GlobalSubrs)
# Renumber subroutines themselves
for subrs in all_subrs:
if subrs == font.GlobalSubrs:
if not hasattr(font, 'FDSelect') and hasattr(font.Private, 'Subrs'):
local_subrs = font.Private.Subrs
else:
local_subrs = []
else:
local_subrs = subrs
subrs.items = [subrs.items[i] for i in subrs._used]
if hasattr(subrs, 'file'):
del subrs.file
if hasattr(subrs, 'offsets'):
del subrs.offsets
for subr in subrs.items:
subr.subset_subroutines (local_subrs, font.GlobalSubrs)
# Cleanup
for subrs in all_subrs:
del subrs._used, subrs._old_bias, subrs._new_bias
return True
@_add_method(ttLib.getTableClass('cmap'))
def closure_glyphs(self, s):
tables = [t for t in self.tables if t.isUnicode()]
# Close glyphs
for table in tables:
if table.format == 14:
for cmap in table.uvsDict.values():
glyphs = {g for u,g in cmap if u in s.unicodes_requested}
if None in glyphs:
glyphs.remove(None)
s.glyphs.update(glyphs)
else:
cmap = table.cmap
intersection = s.unicodes_requested.intersection(cmap.keys())
s.glyphs.update(cmap[u] for u in intersection)
# Calculate unicodes_missing
s.unicodes_missing = s.unicodes_requested.copy()
for table in tables:
s.unicodes_missing.difference_update(table.cmap)
@_add_method(ttLib.getTableClass('cmap'))
def prune_pre_subset(self, font, options):
if not options.legacy_cmap:
# Drop non-Unicode / non-Symbol cmaps
self.tables = [t for t in self.tables if t.isUnicode() or t.isSymbol()]
if not options.symbol_cmap:
self.tables = [t for t in self.tables if not t.isSymbol()]
# TODO(behdad) Only keep one subtable?
# For now, drop format=0 which can't be subset_glyphs easily?
self.tables = [t for t in self.tables if t.format != 0]
self.numSubTables = len(self.tables)
return True # Required table
@_add_method(ttLib.getTableClass('cmap'))
def subset_glyphs(self, s):
s.glyphs = None # We use s.glyphs_requested and s.unicodes_requested only
for t in self.tables:
if t.format == 14:
# TODO(behdad) We drop all the default-UVS mappings
# for glyphs_requested. So it's the caller's responsibility to make
# sure those are included.
t.uvsDict = {v:[(u,g) for u,g in l
if g in s.glyphs_requested or u in s.unicodes_requested]
for v,l in t.uvsDict.items()}
t.uvsDict = {v:l for v,l in t.uvsDict.items() if l}
elif t.isUnicode():
t.cmap = {u:g for u,g in t.cmap.items()
if g in s.glyphs_requested or u in s.unicodes_requested}
else:
t.cmap = {u:g for u,g in t.cmap.items()
if g in s.glyphs_requested}
self.tables = [t for t in self.tables
if (t.cmap if t.format != 14 else t.uvsDict)]
self.numSubTables = len(self.tables)
# TODO(behdad) Convert formats when needed.
# In particular, if we have a format=12 without non-BMP
# characters, either drop format=12 one or convert it
# to format=4 if there's not one.
return True # Required table
@_add_method(ttLib.getTableClass('DSIG'))
def prune_pre_subset(self, font, options):
# Drop all signatures since they will be invalid
self.usNumSigs = 0
self.signatureRecords = []
return True
@_add_method(ttLib.getTableClass('maxp'))
def prune_pre_subset(self, font, options):
if not options.hinting:
if self.tableVersion == 0x00010000:
self.maxZones = 1
self.maxTwilightPoints = 0
self.maxStorage = 0
self.maxFunctionDefs = 0
self.maxInstructionDefs = 0
self.maxStackElements = 0
self.maxSizeOfInstructions = 0
return True
@_add_method(ttLib.getTableClass('name'))
def prune_pre_subset(self, font, options):
nameIDs = set(options.name_IDs)
fvar = font.get('fvar')
if fvar:
nameIDs.update([axis.axisNameID for axis in fvar.axes])
nameIDs.update([inst.subfamilyNameID for inst in fvar.instances])
nameIDs.update([inst.postscriptNameID for inst in fvar.instances
if inst.postscriptNameID != 0xFFFF])
if '*' not in options.name_IDs:
self.names = [n for n in self.names if n.nameID in nameIDs]
if not options.name_legacy:
# TODO(behdad) Sometimes (eg Apple Color Emoji) there's only a macroman
# entry for Latin and no Unicode names.
self.names = [n for n in self.names if n.isUnicode()]
# TODO(behdad) Option to keep only one platform's
if '*' not in options.name_languages:
# TODO(behdad) This is Windows-platform specific!
self.names = [n for n in self.names
if n.langID in options.name_languages]
if options.obfuscate_names:
namerecs = []
for n in self.names:
if n.nameID in [1, 4]:
n.string = ".\x7f".encode('utf_16_be') if n.isUnicode() else ".\x7f"
elif n.nameID in [2, 6]:
n.string = "\x7f".encode('utf_16_be') if n.isUnicode() else "\x7f"
elif n.nameID == 3:
n.string = ""
elif n.nameID in [16, 17, 18]:
continue
namerecs.append(n)
self.names = namerecs
return True # Required table
# TODO(behdad) OS/2 ulCodePageRange?
# TODO(behdad) Drop AAT tables.
# TODO(behdad) Drop unneeded GSUB/GPOS Script/LangSys entries.
# TODO(behdad) Drop empty GSUB/GPOS, and GDEF if no GSUB/GPOS left
# TODO(behdad) Drop GDEF subitems if unused by lookups
# TODO(behdad) Avoid recursing too much (in GSUB/GPOS and in CFF)
# TODO(behdad) Text direction considerations.
# TODO(behdad) Text script / language considerations.
# TODO(behdad) Optionally drop 'kern' table if GPOS available
# TODO(behdad) Implement --unicode='*' to choose all cmap'ed
# TODO(behdad) Drop old-spec Indic scripts
class Options(object):
class OptionError(Exception): pass
class UnknownOptionError(OptionError): pass
# spaces in tag names (e.g. "SVG ", "cvt ") are stripped by the argument parser
_drop_tables_default = ['BASE', 'JSTF', 'DSIG', 'EBDT', 'EBLC',
'EBSC', 'SVG', 'PCLT', 'LTSH']
_drop_tables_default += ['Feat', 'Glat', 'Gloc', 'Silf', 'Sill'] # Graphite
_drop_tables_default += ['sbix'] # Color
_no_subset_tables_default = ['avar', 'fvar',
'gasp', 'head', 'hhea', 'maxp',
'vhea', 'OS/2', 'loca', 'name', 'cvt',
'fpgm', 'prep', 'VDMX', 'DSIG', 'CPAL']
_hinting_tables_default = ['cvar', 'cvt', 'fpgm', 'prep', 'hdmx', 'VDMX']
# Based on HarfBuzz shapers
_layout_features_groups = {
# Default shaper
'common': ['ccmp', 'liga', 'locl', 'mark', 'mkmk', 'rlig'],
'horizontal': ['calt', 'clig', 'curs', 'kern', 'rclt'],
'vertical': ['valt', 'vert', 'vkrn', 'vpal', 'vrt2'],
'ltr': ['ltra', 'ltrm'],
'rtl': ['rtla', 'rtlm'],
# Complex shapers
'arabic': ['init', 'medi', 'fina', 'isol', 'med2', 'fin2', 'fin3',
'cswh', 'mset', 'stch'],
'hangul': ['ljmo', 'vjmo', 'tjmo'],
'tibetan': ['abvs', 'blws', 'abvm', 'blwm'],
'indic': ['nukt', 'akhn', 'rphf', 'rkrf', 'pref', 'blwf', 'half',
'abvf', 'pstf', 'cfar', 'vatu', 'cjct', 'init', 'pres',
'abvs', 'blws', 'psts', 'haln', 'dist', 'abvm', 'blwm'],
}
_layout_features_default = _uniq_sort(sum(
iter(_layout_features_groups.values()), []))
def __init__(self, **kwargs):
self.drop_tables = self._drop_tables_default[:]
self.no_subset_tables = self._no_subset_tables_default[:]
self.passthrough_tables = False # keep/drop tables we can't subset
self.hinting_tables = self._hinting_tables_default[:]
self.legacy_kern = False # drop 'kern' table if GPOS available
self.layout_features = self._layout_features_default[:]
self.ignore_missing_glyphs = False
self.ignore_missing_unicodes = True
self.hinting = True
self.glyph_names = False
self.legacy_cmap = False
self.symbol_cmap = False
self.name_IDs = [1, 2] # Family and Style
self.name_legacy = False
self.name_languages = [0x0409] # English
self.obfuscate_names = False # to make webfont unusable as a system font
self.notdef_glyph = True # gid0 for TrueType / .notdef for CFF
self.notdef_outline = False # No need for notdef to have an outline really
self.recommended_glyphs = False # gid1, gid2, gid3 for TrueType
self.recalc_bounds = False # Recalculate font bounding boxes
self.recalc_timestamp = False # Recalculate font modified timestamp
self.prune_unicode_ranges = True # Clear unused 'ulUnicodeRange' bits
self.recalc_average_width = False # update 'xAvgCharWidth'
self.canonical_order = None # Order tables as recommended
self.flavor = None # May be 'woff' or 'woff2'
self.with_zopfli = False # use zopfli instead of zlib for WOFF 1.0
self.desubroutinize = False # Desubroutinize CFF CharStrings
self.verbose = False
self.timing = False
self.xml = False
self.set(**kwargs)
def set(self, **kwargs):
for k,v in kwargs.items():
if not hasattr(self, k):
raise self.UnknownOptionError("Unknown option '%s'" % k)
setattr(self, k, v)
def parse_opts(self, argv, ignore_unknown=False):
posargs = []
passthru_options = []
for a in argv:
orig_a = a
if not a.startswith('--'):
posargs.append(a)
continue
a = a[2:]
i = a.find('=')
op = '='
if i == -1:
if a.startswith("no-"):
k = a[3:]
if k == "canonical-order":
# reorderTables=None is faster than False (the latter
# still reorders to "keep" the original table order)
v = None
else:
v = False
else:
k = a
v = True
if k.endswith("?"):
k = k[:-1]
v = '?'
else:
k = a[:i]
if k[-1] in "-+":
op = k[-1]+'=' # Op is '-=' or '+=' now.
k = k[:-1]
v = a[i+1:]
ok = k
k = k.replace('-', '_')
if not hasattr(self, k):
if ignore_unknown is True or ok in ignore_unknown:
passthru_options.append(orig_a)
continue
else:
raise self.UnknownOptionError("Unknown option '%s'" % a)
ov = getattr(self, k)
if v == '?':
print("Current setting for '%s' is: %s" % (ok, ov))
continue
if isinstance(ov, bool):
v = bool(v)
elif isinstance(ov, int):
v = int(v)
elif isinstance(ov, str):
v = str(v) # redundant
elif isinstance(ov, list):
if isinstance(v, bool):
raise self.OptionError("Option '%s' requires values to be specified using '='" % a)
vv = v.replace(',', ' ').split()
if vv == ['']:
vv = []
vv = [int(x, 0) if len(x) and x[0] in "0123456789" else x for x in vv]
if op == '=':
v = vv
elif op == '+=':
v = ov
v.extend(vv)
elif op == '-=':
v = ov
for x in vv:
if x in v:
v.remove(x)
else:
assert False
setattr(self, k, v)
return posargs + passthru_options
class Subsetter(object):
class SubsettingError(Exception): pass
class MissingGlyphsSubsettingError(SubsettingError): pass
class MissingUnicodesSubsettingError(SubsettingError): pass
def __init__(self, options=None):
if not options:
options = Options()
self.options = options
self.unicodes_requested = set()
self.glyph_names_requested = set()
self.glyph_ids_requested = set()
def populate(self, glyphs=[], gids=[], unicodes=[], text=""):
self.unicodes_requested.update(unicodes)
if isinstance(text, bytes):
text = text.decode("utf_8")
text_utf32 = text.encode("utf-32-be")
nchars = len(text_utf32)//4
for u in struct.unpack('>%dL' % nchars, text_utf32):
self.unicodes_requested.add(u)
self.glyph_names_requested.update(glyphs)
self.glyph_ids_requested.update(gids)
def _prune_pre_subset(self, font):
for tag in self._sort_tables(font):
if(tag.strip() in self.options.drop_tables or
(tag.strip() in self.options.hinting_tables and not self.options.hinting) or
(tag == 'kern' and (not self.options.legacy_kern and 'GPOS' in font))):
log.info("%s dropped", tag)
del font[tag]
continue
clazz = ttLib.getTableClass(tag)
if hasattr(clazz, 'prune_pre_subset'):
with timer("load '%s'" % tag):
table = font[tag]
with timer("prune '%s'" % tag):
retain = table.prune_pre_subset(font, self.options)
if not retain:
log.info("%s pruned to empty; dropped", tag)
del font[tag]
continue
else:
log.info("%s pruned", tag)
def _closure_glyphs(self, font):
realGlyphs = set(font.getGlyphOrder())
glyph_order = font.getGlyphOrder()
self.glyphs_requested = set()
self.glyphs_requested.update(self.glyph_names_requested)
self.glyphs_requested.update(glyph_order[i]
for i in self.glyph_ids_requested
if i < len(glyph_order))
self.glyphs_missing = set()
self.glyphs_missing.update(self.glyphs_requested.difference(realGlyphs))
self.glyphs_missing.update(i for i in self.glyph_ids_requested
if i >= len(glyph_order))
if self.glyphs_missing:
log.info("Missing requested glyphs: %s", self.glyphs_missing)
if not self.options.ignore_missing_glyphs:
raise self.MissingGlyphsSubsettingError(self.glyphs_missing)
self.glyphs = self.glyphs_requested.copy()
self.unicodes_missing = set()
if 'cmap' in font:
with timer("close glyph list over 'cmap'"):
font['cmap'].closure_glyphs(self)
self.glyphs.intersection_update(realGlyphs)
self.glyphs_cmaped = frozenset(self.glyphs)
if self.unicodes_missing:
missing = ["U+%04X" % u for u in self.unicodes_missing]
log.info("Missing glyphs for requested Unicodes: %s", missing)
if not self.options.ignore_missing_unicodes:
raise self.MissingUnicodesSubsettingError(missing)
del missing
if self.options.notdef_glyph:
if 'glyf' in font:
self.glyphs.add(font.getGlyphName(0))
log.info("Added gid0 to subset")
else:
self.glyphs.add('.notdef')
log.info("Added .notdef to subset")
if self.options.recommended_glyphs:
if 'glyf' in font:
for i in range(min(4, len(font.getGlyphOrder()))):
self.glyphs.add(font.getGlyphName(i))
log.info("Added first four glyphs to subset")
if 'GSUB' in font:
with timer("close glyph list over 'GSUB'"):
log.info("Closing glyph list over 'GSUB': %d glyphs before",
len(self.glyphs))
log.glyphs(self.glyphs, font=font)
font['GSUB'].closure_glyphs(self)
self.glyphs.intersection_update(realGlyphs)
log.info("Closed glyph list over 'GSUB': %d glyphs after",
len(self.glyphs))
log.glyphs(self.glyphs, font=font)
self.glyphs_gsubed = frozenset(self.glyphs)
if 'MATH' in font:
with timer("close glyph list over 'MATH'"):
log.info("Closing glyph list over 'MATH': %d glyphs before",
len(self.glyphs))
log.glyphs(self.glyphs, font=font)
font['MATH'].closure_glyphs(self)
self.glyphs.intersection_update(realGlyphs)
log.info("Closed glyph list over 'MATH': %d glyphs after",
len(self.glyphs))
log.glyphs(self.glyphs, font=font)
self.glyphs_mathed = frozenset(self.glyphs)
if 'COLR' in font:
with timer("close glyph list over 'COLR'"):
log.info("Closing glyph list over 'COLR': %d glyphs before",
len(self.glyphs))
log.glyphs(self.glyphs, font=font)
font['COLR'].closure_glyphs(self)
self.glyphs.intersection_update(realGlyphs)
log.info("Closed glyph list over 'COLR': %d glyphs after",
len(self.glyphs))
log.glyphs(self.glyphs, font=font)
self.glyphs_colred = frozenset(self.glyphs)
if 'glyf' in font:
with timer("close glyph list over 'glyf'"):
log.info("Closing glyph list over 'glyf': %d glyphs before",
len(self.glyphs))
log.glyphs(self.glyphs, font=font)
font['glyf'].closure_glyphs(self)
self.glyphs.intersection_update(realGlyphs)
log.info("Closed glyph list over 'glyf': %d glyphs after",
len(self.glyphs))
log.glyphs(self.glyphs, font=font)
self.glyphs_glyfed = frozenset(self.glyphs)
self.glyphs_all = frozenset(self.glyphs)
log.info("Retaining %d glyphs", len(self.glyphs_all))
del self.glyphs
def _subset_glyphs(self, font):
for tag in self._sort_tables(font):
clazz = ttLib.getTableClass(tag)
if tag.strip() in self.options.no_subset_tables:
log.info("%s subsetting not needed", tag)
elif hasattr(clazz, 'subset_glyphs'):
with timer("subset '%s'" % tag):
table = font[tag]
self.glyphs = self.glyphs_all
retain = table.subset_glyphs(self)
del self.glyphs
if not retain:
log.info("%s subsetted to empty; dropped", tag)
del font[tag]
else:
log.info("%s subsetted", tag)
elif self.options.passthrough_tables:
log.info("%s NOT subset; don't know how to subset", tag)
else:
log.info("%s NOT subset; don't know how to subset; dropped", tag)
del font[tag]
with timer("subset GlyphOrder"):
glyphOrder = font.getGlyphOrder()
glyphOrder = [g for g in glyphOrder if g in self.glyphs_all]
font.setGlyphOrder(glyphOrder)
font._buildReverseGlyphOrderDict()
def _prune_post_subset(self, font):
for tag in font.keys():
if tag == 'GlyphOrder': continue
if tag == 'OS/2' and self.options.prune_unicode_ranges:
old_uniranges = font[tag].getUnicodeRanges()
new_uniranges = font[tag].recalcUnicodeRanges(font, pruneOnly=True)
if old_uniranges != new_uniranges:
log.info("%s Unicode ranges pruned: %s", tag, sorted(new_uniranges))
if self.options.recalc_average_width:
widths = [m[0] for m in font["hmtx"].metrics.values() if m[0] > 0]
avg_width = int(round(sum(widths) / len(widths)))
if avg_width != font[tag].xAvgCharWidth:
font[tag].xAvgCharWidth = avg_width
log.info("%s xAvgCharWidth updated: %d", tag, avg_width)
clazz = ttLib.getTableClass(tag)
if hasattr(clazz, 'prune_post_subset'):
with timer("prune '%s'" % tag):
table = font[tag]
retain = table.prune_post_subset(self.options)
if not retain:
log.info("%s pruned to empty; dropped", tag)
del font[tag]
else:
log.info("%s pruned", tag)
def _sort_tables(self, font):
tagOrder = ['fvar', 'avar', 'gvar', 'name', 'glyf']
tagOrder = {t: i + 1 for i, t in enumerate(tagOrder)}
tags = sorted(font.keys(), key=lambda tag: tagOrder.get(tag, 0))
return [t for t in tags if t != 'GlyphOrder']
def subset(self, font):
self._prune_pre_subset(font)
self._closure_glyphs(font)
self._subset_glyphs(font)
self._prune_post_subset(font)
@timer("load font")
def load_font(fontFile,
options,
allowVID=False,
checkChecksums=False,
dontLoadGlyphNames=False,
lazy=True):
font = ttLib.TTFont(fontFile,
allowVID=allowVID,
checkChecksums=checkChecksums,
recalcBBoxes=options.recalc_bounds,
recalcTimestamp=options.recalc_timestamp,
lazy=lazy)
# Hack:
#
# If we don't need glyph names, change 'post' class to not try to
# load them. It avoid lots of headache with broken fonts as well
# as loading time.
#
# Ideally ttLib should provide a way to ask it to skip loading
# glyph names. But it currently doesn't provide such a thing.
#
if dontLoadGlyphNames:
post = ttLib.getTableClass('post')
saved = post.decode_format_2_0
post.decode_format_2_0 = post.decode_format_3_0
f = font['post']
if f.formatType == 2.0:
f.formatType = 3.0
post.decode_format_2_0 = saved
return font
@timer("compile and save font")
def save_font(font, outfile, options):
if options.flavor and not hasattr(font, 'flavor'):
raise Exception("fonttools version does not support flavors.")
if options.with_zopfli and options.flavor == "woff":
from fontTools.ttLib import sfnt
sfnt.USE_ZOPFLI = True
font.flavor = options.flavor
font.save(outfile, reorderTables=options.canonical_order)
def parse_unicodes(s):
import re
s = re.sub (r"0[xX]", " ", s)
s = re.sub (r"[<+>,;&#\\xXuU\n ]", " ", s)
l = []
for item in s.split():
fields = item.split('-')
if len(fields) == 1:
l.append(int(item, 16))
else:
start,end = fields
l.extend(range(int(start, 16), int(end, 16)+1))
return l
def parse_gids(s):
l = []
for item in s.replace(',', ' ').split():
fields = item.split('-')
if len(fields) == 1:
l.append(int(fields[0]))
else:
l.extend(range(int(fields[0]), int(fields[1])+1))
return l
def parse_glyphs(s):
return s.replace(',', ' ').split()
def usage():
print("usage:", __usage__, file=sys.stderr)
print("Try pyftsubset --help for more information.\n", file=sys.stderr)
@timer("make one with everything (TOTAL TIME)")
def main(args=None):
from os.path import splitext
from fontTools import configLogger
if args is None:
args = sys.argv[1:]
if '--help' in args:
print(__doc__)
return 0
options = Options()
try:
args = options.parse_opts(args,
ignore_unknown=['gids', 'gids-file',
'glyphs', 'glyphs-file',
'text', 'text-file',
'unicodes', 'unicodes-file',
'output-file'])
except options.OptionError as e:
usage()
print("ERROR:", e, file=sys.stderr)
return 2
if len(args) < 2:
usage()
return 1
configLogger(level=logging.INFO if options.verbose else logging.WARNING)
if options.timing:
timer.logger.setLevel(logging.DEBUG)
else:
timer.logger.disabled = True
fontfile = args[0]
args = args[1:]
subsetter = Subsetter(options=options)
basename, extension = splitext(fontfile)
outfile = basename + '.subset' + extension
glyphs = []
gids = []
unicodes = []
wildcard_glyphs = False
wildcard_unicodes = False
text = ""
for g in args:
if g == '*':
wildcard_glyphs = True
continue
if g.startswith('--output-file='):
outfile = g[14:]
continue
if g.startswith('--text='):
text += g[7:]
continue
if g.startswith('--text-file='):
text += open(g[12:], encoding='utf-8').read().replace('\n', '')
continue
if g.startswith('--unicodes='):
if g[11:] == '*':
wildcard_unicodes = True
else:
unicodes.extend(parse_unicodes(g[11:]))
continue
if g.startswith('--unicodes-file='):
for line in open(g[16:]).readlines():
unicodes.extend(parse_unicodes(line.split('#')[0]))
continue
if g.startswith('--gids='):
gids.extend(parse_gids(g[7:]))
continue
if g.startswith('--gids-file='):
for line in open(g[12:]).readlines():
gids.extend(parse_gids(line.split('#')[0]))
continue
if g.startswith('--glyphs='):
if g[9:] == '*':
wildcard_glyphs = True
else:
glyphs.extend(parse_glyphs(g[9:]))
continue
if g.startswith('--glyphs-file='):
for line in open(g[14:]).readlines():
glyphs.extend(parse_glyphs(line.split('#')[0]))
continue
glyphs.append(g)
dontLoadGlyphNames = not options.glyph_names and not glyphs
font = load_font(fontfile, options, dontLoadGlyphNames=dontLoadGlyphNames)
with timer("compile glyph list"):
if wildcard_glyphs:
glyphs.extend(font.getGlyphOrder())
if wildcard_unicodes:
for t in font['cmap'].tables:
if t.isUnicode():
unicodes.extend(t.cmap.keys())
assert '' not in glyphs
log.info("Text: '%s'" % text)
log.info("Unicodes: %s", unicodes)
log.info("Glyphs: %s", glyphs)
log.info("Gids: %s", gids)
subsetter.populate(glyphs=glyphs, gids=gids, unicodes=unicodes, text=text)
subsetter.subset(font)
save_font(font, outfile, options)
if options.verbose:
import os
log.info("Input font:% 7d bytes: %s" % (os.path.getsize(fontfile), fontfile))
log.info("Subset font:% 7d bytes: %s" % (os.path.getsize(outfile), outfile))
if options.xml:
font.saveXML(sys.stdout)
font.close()
__all__ = [
'Options',
'Subsetter',
'load_font',
'save_font',
'parse_gids',
'parse_glyphs',
'parse_unicodes',
'main'
]
if __name__ == '__main__':
sys.exit(main())