1150 lines
40 KiB
Python
1150 lines
40 KiB
Python
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from fontTools.config import Config
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from fontTools.misc import xmlWriter
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from fontTools.misc.configTools import AbstractConfig
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from fontTools.misc.textTools import Tag, byteord, tostr
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from fontTools.misc.loggingTools import deprecateArgument
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from fontTools.ttLib import TTLibError
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from fontTools.ttLib.ttGlyphSet import _TTGlyph, _TTGlyphSetCFF, _TTGlyphSetGlyf
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from fontTools.ttLib.sfnt import SFNTReader, SFNTWriter
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from io import BytesIO, StringIO, UnsupportedOperation
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import os
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import logging
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import traceback
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log = logging.getLogger(__name__)
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class TTFont(object):
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"""Represents a TrueType font.
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The object manages file input and output, and offers a convenient way of
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accessing tables. Tables will be only decompiled when necessary, ie. when
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they're actually accessed. This means that simple operations can be extremely fast.
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Example usage::
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>> from fontTools import ttLib
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>> tt = ttLib.TTFont("afont.ttf") # Load an existing font file
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>> tt['maxp'].numGlyphs
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242
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>> tt['OS/2'].achVendID
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'B&H\000'
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>> tt['head'].unitsPerEm
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2048
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For details of the objects returned when accessing each table, see :ref:`tables`.
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To add a table to the font, use the :py:func:`newTable` function::
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>> os2 = newTable("OS/2")
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>> os2.version = 4
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>> # set other attributes
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>> font["OS/2"] = os2
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TrueType fonts can also be serialized to and from XML format (see also the
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:ref:`ttx` binary)::
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>> tt.saveXML("afont.ttx")
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Dumping 'LTSH' table...
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Dumping 'OS/2' table...
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[...]
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>> tt2 = ttLib.TTFont() # Create a new font object
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>> tt2.importXML("afont.ttx")
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>> tt2['maxp'].numGlyphs
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242
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The TTFont object may be used as a context manager; this will cause the file
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reader to be closed after the context ``with`` block is exited::
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with TTFont(filename) as f:
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# Do stuff
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Args:
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file: When reading a font from disk, either a pathname pointing to a file,
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or a readable file object.
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res_name_or_index: If running on a Macintosh, either a sfnt resource name or
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an sfnt resource index number. If the index number is zero, TTLib will
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autodetect whether the file is a flat file or a suitcase. (If it is a suitcase,
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only the first 'sfnt' resource will be read.)
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sfntVersion (str): When constructing a font object from scratch, sets the four-byte
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sfnt magic number to be used. Defaults to ``\0\1\0\0`` (TrueType). To create
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an OpenType file, use ``OTTO``.
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flavor (str): Set this to ``woff`` when creating a WOFF file or ``woff2`` for a WOFF2
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file.
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checkChecksums (int): How checksum data should be treated. Default is 0
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(no checking). Set to 1 to check and warn on wrong checksums; set to 2 to
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raise an exception if any wrong checksums are found.
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recalcBBoxes (bool): If true (the default), recalculates ``glyf``, ``CFF ``,
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``head`` bounding box values and ``hhea``/``vhea`` min/max values on save.
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Also compiles the glyphs on importing, which saves memory consumption and
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time.
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ignoreDecompileErrors (bool): If true, exceptions raised during table decompilation
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will be ignored, and the binary data will be returned for those tables instead.
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recalcTimestamp (bool): If true (the default), sets the ``modified`` timestamp in
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the ``head`` table on save.
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fontNumber (int): The index of the font in a TrueType Collection file.
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lazy (bool): If lazy is set to True, many data structures are loaded lazily, upon
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access only. If it is set to False, many data structures are loaded immediately.
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The default is ``lazy=None`` which is somewhere in between.
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"""
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def __init__(
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self,
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file=None,
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res_name_or_index=None,
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sfntVersion="\000\001\000\000",
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flavor=None,
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checkChecksums=0,
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verbose=None,
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recalcBBoxes=True,
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allowVID=NotImplemented,
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ignoreDecompileErrors=False,
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recalcTimestamp=True,
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fontNumber=-1,
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lazy=None,
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quiet=None,
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_tableCache=None,
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cfg={},
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):
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for name in ("verbose", "quiet"):
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val = locals().get(name)
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if val is not None:
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deprecateArgument(name, "configure logging instead")
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setattr(self, name, val)
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self.lazy = lazy
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self.recalcBBoxes = recalcBBoxes
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self.recalcTimestamp = recalcTimestamp
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self.tables = {}
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self.reader = None
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self.cfg = cfg.copy() if isinstance(cfg, AbstractConfig) else Config(cfg)
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self.ignoreDecompileErrors = ignoreDecompileErrors
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if not file:
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self.sfntVersion = sfntVersion
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self.flavor = flavor
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self.flavorData = None
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return
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seekable = True
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if not hasattr(file, "read"):
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closeStream = True
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# assume file is a string
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if res_name_or_index is not None:
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# see if it contains 'sfnt' resources in the resource or data fork
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from . import macUtils
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if res_name_or_index == 0:
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if macUtils.getSFNTResIndices(file):
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# get the first available sfnt font.
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file = macUtils.SFNTResourceReader(file, 1)
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else:
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file = open(file, "rb")
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else:
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file = macUtils.SFNTResourceReader(file, res_name_or_index)
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else:
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file = open(file, "rb")
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else:
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# assume "file" is a readable file object
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closeStream = False
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# SFNTReader wants the input file to be seekable.
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# SpooledTemporaryFile has no seekable() on < 3.11, but still can seek:
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# https://github.com/fonttools/fonttools/issues/3052
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if hasattr(file, "seekable"):
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seekable = file.seekable()
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elif hasattr(file, "seek"):
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try:
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file.seek(0)
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except UnsupportedOperation:
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seekable = False
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if not self.lazy:
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# read input file in memory and wrap a stream around it to allow overwriting
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if seekable:
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file.seek(0)
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tmp = BytesIO(file.read())
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if hasattr(file, "name"):
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# save reference to input file name
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tmp.name = file.name
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if closeStream:
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file.close()
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file = tmp
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elif not seekable:
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raise TTLibError("Input file must be seekable when lazy=True")
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self._tableCache = _tableCache
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self.reader = SFNTReader(file, checkChecksums, fontNumber=fontNumber)
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self.sfntVersion = self.reader.sfntVersion
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self.flavor = self.reader.flavor
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self.flavorData = self.reader.flavorData
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def __enter__(self):
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return self
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def __exit__(self, type, value, traceback):
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self.close()
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def close(self):
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"""If we still have a reader object, close it."""
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if self.reader is not None:
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self.reader.close()
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def save(self, file, reorderTables=True):
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"""Save the font to disk.
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Args:
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file: Similarly to the constructor, can be either a pathname or a writable
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file object.
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reorderTables (Option[bool]): If true (the default), reorder the tables,
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sorting them by tag (recommended by the OpenType specification). If
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false, retain the original font order. If None, reorder by table
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dependency (fastest).
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"""
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if not hasattr(file, "write"):
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if self.lazy and self.reader.file.name == file:
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raise TTLibError("Can't overwrite TTFont when 'lazy' attribute is True")
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createStream = True
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else:
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# assume "file" is a writable file object
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createStream = False
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tmp = BytesIO()
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writer_reordersTables = self._save(tmp)
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if not (
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reorderTables is None
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or writer_reordersTables
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or (reorderTables is False and self.reader is None)
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):
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if reorderTables is False:
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# sort tables using the original font's order
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tableOrder = list(self.reader.keys())
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else:
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# use the recommended order from the OpenType specification
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tableOrder = None
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tmp.flush()
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tmp2 = BytesIO()
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reorderFontTables(tmp, tmp2, tableOrder)
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tmp.close()
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tmp = tmp2
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if createStream:
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# "file" is a path
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with open(file, "wb") as file:
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file.write(tmp.getvalue())
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else:
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file.write(tmp.getvalue())
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tmp.close()
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def _save(self, file, tableCache=None):
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"""Internal function, to be shared by save() and TTCollection.save()"""
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if self.recalcTimestamp and "head" in self:
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self[
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"head"
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] # make sure 'head' is loaded so the recalculation is actually done
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tags = list(self.keys())
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if "GlyphOrder" in tags:
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tags.remove("GlyphOrder")
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numTables = len(tags)
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# write to a temporary stream to allow saving to unseekable streams
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writer = SFNTWriter(
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file, numTables, self.sfntVersion, self.flavor, self.flavorData
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)
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done = []
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for tag in tags:
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self._writeTable(tag, writer, done, tableCache)
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writer.close()
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return writer.reordersTables()
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def saveXML(self, fileOrPath, newlinestr="\n", **kwargs):
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"""Export the font as TTX (an XML-based text file), or as a series of text
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files when splitTables is true. In the latter case, the 'fileOrPath'
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argument should be a path to a directory.
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The 'tables' argument must either be false (dump all tables) or a
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list of tables to dump. The 'skipTables' argument may be a list of tables
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to skip, but only when the 'tables' argument is false.
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"""
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writer = xmlWriter.XMLWriter(fileOrPath, newlinestr=newlinestr)
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self._saveXML(writer, **kwargs)
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writer.close()
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def _saveXML(
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self,
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writer,
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writeVersion=True,
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quiet=None,
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tables=None,
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skipTables=None,
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splitTables=False,
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splitGlyphs=False,
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disassembleInstructions=True,
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bitmapGlyphDataFormat="raw",
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):
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if quiet is not None:
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deprecateArgument("quiet", "configure logging instead")
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self.disassembleInstructions = disassembleInstructions
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self.bitmapGlyphDataFormat = bitmapGlyphDataFormat
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if not tables:
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tables = list(self.keys())
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if "GlyphOrder" not in tables:
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tables = ["GlyphOrder"] + tables
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if skipTables:
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for tag in skipTables:
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if tag in tables:
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tables.remove(tag)
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numTables = len(tables)
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if writeVersion:
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from fontTools import version
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version = ".".join(version.split(".")[:2])
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writer.begintag(
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"ttFont",
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sfntVersion=repr(tostr(self.sfntVersion))[1:-1],
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ttLibVersion=version,
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)
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else:
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writer.begintag("ttFont", sfntVersion=repr(tostr(self.sfntVersion))[1:-1])
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writer.newline()
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# always splitTables if splitGlyphs is enabled
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splitTables = splitTables or splitGlyphs
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if not splitTables:
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writer.newline()
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else:
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path, ext = os.path.splitext(writer.filename)
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for i in range(numTables):
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tag = tables[i]
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if splitTables:
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tablePath = path + "." + tagToIdentifier(tag) + ext
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tableWriter = xmlWriter.XMLWriter(
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tablePath, newlinestr=writer.newlinestr
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)
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tableWriter.begintag("ttFont", ttLibVersion=version)
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tableWriter.newline()
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tableWriter.newline()
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writer.simpletag(tagToXML(tag), src=os.path.basename(tablePath))
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writer.newline()
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else:
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tableWriter = writer
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self._tableToXML(tableWriter, tag, splitGlyphs=splitGlyphs)
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if splitTables:
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tableWriter.endtag("ttFont")
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tableWriter.newline()
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tableWriter.close()
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writer.endtag("ttFont")
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writer.newline()
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def _tableToXML(self, writer, tag, quiet=None, splitGlyphs=False):
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if quiet is not None:
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deprecateArgument("quiet", "configure logging instead")
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if tag in self:
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table = self[tag]
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report = "Dumping '%s' table..." % tag
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else:
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report = "No '%s' table found." % tag
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log.info(report)
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if tag not in self:
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return
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xmlTag = tagToXML(tag)
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attrs = dict()
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if hasattr(table, "ERROR"):
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attrs["ERROR"] = "decompilation error"
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from .tables.DefaultTable import DefaultTable
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if table.__class__ == DefaultTable:
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attrs["raw"] = True
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writer.begintag(xmlTag, **attrs)
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writer.newline()
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if tag == "glyf":
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table.toXML(writer, self, splitGlyphs=splitGlyphs)
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else:
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table.toXML(writer, self)
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writer.endtag(xmlTag)
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writer.newline()
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writer.newline()
|
||
|
|
|
||
|
|
def importXML(self, fileOrPath, quiet=None):
|
||
|
|
"""Import a TTX file (an XML-based text format), so as to recreate
|
||
|
|
a font object.
|
||
|
|
"""
|
||
|
|
if quiet is not None:
|
||
|
|
deprecateArgument("quiet", "configure logging instead")
|
||
|
|
|
||
|
|
if "maxp" in self and "post" in self:
|
||
|
|
# Make sure the glyph order is loaded, as it otherwise gets
|
||
|
|
# lost if the XML doesn't contain the glyph order, yet does
|
||
|
|
# contain the table which was originally used to extract the
|
||
|
|
# glyph names from (ie. 'post', 'cmap' or 'CFF ').
|
||
|
|
self.getGlyphOrder()
|
||
|
|
|
||
|
|
from fontTools.misc import xmlReader
|
||
|
|
|
||
|
|
reader = xmlReader.XMLReader(fileOrPath, self)
|
||
|
|
reader.read()
|
||
|
|
|
||
|
|
def isLoaded(self, tag):
|
||
|
|
"""Return true if the table identified by ``tag`` has been
|
||
|
|
decompiled and loaded into memory."""
|
||
|
|
return tag in self.tables
|
||
|
|
|
||
|
|
def has_key(self, tag):
|
||
|
|
"""Test if the table identified by ``tag`` is present in the font.
|
||
|
|
|
||
|
|
As well as this method, ``tag in font`` can also be used to determine the
|
||
|
|
presence of the table."""
|
||
|
|
if self.isLoaded(tag):
|
||
|
|
return True
|
||
|
|
elif self.reader and tag in self.reader:
|
||
|
|
return True
|
||
|
|
elif tag == "GlyphOrder":
|
||
|
|
return True
|
||
|
|
else:
|
||
|
|
return False
|
||
|
|
|
||
|
|
__contains__ = has_key
|
||
|
|
|
||
|
|
def keys(self):
|
||
|
|
"""Returns the list of tables in the font, along with the ``GlyphOrder`` pseudo-table."""
|
||
|
|
keys = list(self.tables.keys())
|
||
|
|
if self.reader:
|
||
|
|
for key in list(self.reader.keys()):
|
||
|
|
if key not in keys:
|
||
|
|
keys.append(key)
|
||
|
|
|
||
|
|
if "GlyphOrder" in keys:
|
||
|
|
keys.remove("GlyphOrder")
|
||
|
|
keys = sortedTagList(keys)
|
||
|
|
return ["GlyphOrder"] + keys
|
||
|
|
|
||
|
|
def ensureDecompiled(self, recurse=None):
|
||
|
|
"""Decompile all the tables, even if a TTFont was opened in 'lazy' mode."""
|
||
|
|
for tag in self.keys():
|
||
|
|
table = self[tag]
|
||
|
|
if recurse is None:
|
||
|
|
recurse = self.lazy is not False
|
||
|
|
if recurse and hasattr(table, "ensureDecompiled"):
|
||
|
|
table.ensureDecompiled(recurse=recurse)
|
||
|
|
self.lazy = False
|
||
|
|
|
||
|
|
def __len__(self):
|
||
|
|
return len(list(self.keys()))
|
||
|
|
|
||
|
|
def __getitem__(self, tag):
|
||
|
|
tag = Tag(tag)
|
||
|
|
table = self.tables.get(tag)
|
||
|
|
if table is None:
|
||
|
|
if tag == "GlyphOrder":
|
||
|
|
table = GlyphOrder(tag)
|
||
|
|
self.tables[tag] = table
|
||
|
|
elif self.reader is not None:
|
||
|
|
table = self._readTable(tag)
|
||
|
|
else:
|
||
|
|
raise KeyError("'%s' table not found" % tag)
|
||
|
|
return table
|
||
|
|
|
||
|
|
def _readTable(self, tag):
|
||
|
|
log.debug("Reading '%s' table from disk", tag)
|
||
|
|
data = self.reader[tag]
|
||
|
|
if self._tableCache is not None:
|
||
|
|
table = self._tableCache.get((tag, data))
|
||
|
|
if table is not None:
|
||
|
|
return table
|
||
|
|
tableClass = getTableClass(tag)
|
||
|
|
table = tableClass(tag)
|
||
|
|
self.tables[tag] = table
|
||
|
|
log.debug("Decompiling '%s' table", tag)
|
||
|
|
try:
|
||
|
|
table.decompile(data, self)
|
||
|
|
except Exception:
|
||
|
|
if not self.ignoreDecompileErrors:
|
||
|
|
raise
|
||
|
|
# fall back to DefaultTable, retaining the binary table data
|
||
|
|
log.exception(
|
||
|
|
"An exception occurred during the decompilation of the '%s' table", tag
|
||
|
|
)
|
||
|
|
from .tables.DefaultTable import DefaultTable
|
||
|
|
|
||
|
|
file = StringIO()
|
||
|
|
traceback.print_exc(file=file)
|
||
|
|
table = DefaultTable(tag)
|
||
|
|
table.ERROR = file.getvalue()
|
||
|
|
self.tables[tag] = table
|
||
|
|
table.decompile(data, self)
|
||
|
|
if self._tableCache is not None:
|
||
|
|
self._tableCache[(tag, data)] = table
|
||
|
|
return table
|
||
|
|
|
||
|
|
def __setitem__(self, tag, table):
|
||
|
|
self.tables[Tag(tag)] = table
|
||
|
|
|
||
|
|
def __delitem__(self, tag):
|
||
|
|
if tag not in self:
|
||
|
|
raise KeyError("'%s' table not found" % tag)
|
||
|
|
if tag in self.tables:
|
||
|
|
del self.tables[tag]
|
||
|
|
if self.reader and tag in self.reader:
|
||
|
|
del self.reader[tag]
|
||
|
|
|
||
|
|
def get(self, tag, default=None):
|
||
|
|
"""Returns the table if it exists or (optionally) a default if it doesn't."""
|
||
|
|
try:
|
||
|
|
return self[tag]
|
||
|
|
except KeyError:
|
||
|
|
return default
|
||
|
|
|
||
|
|
def setGlyphOrder(self, glyphOrder):
|
||
|
|
"""Set the glyph order
|
||
|
|
|
||
|
|
Args:
|
||
|
|
glyphOrder ([str]): List of glyph names in order.
|
||
|
|
"""
|
||
|
|
self.glyphOrder = glyphOrder
|
||
|
|
if hasattr(self, "_reverseGlyphOrderDict"):
|
||
|
|
del self._reverseGlyphOrderDict
|
||
|
|
if self.isLoaded("glyf"):
|
||
|
|
self["glyf"].setGlyphOrder(glyphOrder)
|
||
|
|
|
||
|
|
def getGlyphOrder(self):
|
||
|
|
"""Returns a list of glyph names ordered by their position in the font."""
|
||
|
|
try:
|
||
|
|
return self.glyphOrder
|
||
|
|
except AttributeError:
|
||
|
|
pass
|
||
|
|
if "CFF " in self:
|
||
|
|
cff = self["CFF "]
|
||
|
|
self.glyphOrder = cff.getGlyphOrder()
|
||
|
|
elif "post" in self:
|
||
|
|
# TrueType font
|
||
|
|
glyphOrder = self["post"].getGlyphOrder()
|
||
|
|
if glyphOrder is None:
|
||
|
|
#
|
||
|
|
# No names found in the 'post' table.
|
||
|
|
# Try to create glyph names from the unicode cmap (if available)
|
||
|
|
# in combination with the Adobe Glyph List (AGL).
|
||
|
|
#
|
||
|
|
self._getGlyphNamesFromCmap()
|
||
|
|
elif len(glyphOrder) < self["maxp"].numGlyphs:
|
||
|
|
#
|
||
|
|
# Not enough names found in the 'post' table.
|
||
|
|
# Can happen when 'post' format 1 is improperly used on a font that
|
||
|
|
# has more than 258 glyphs (the lenght of 'standardGlyphOrder').
|
||
|
|
#
|
||
|
|
log.warning(
|
||
|
|
"Not enough names found in the 'post' table, generating them from cmap instead"
|
||
|
|
)
|
||
|
|
self._getGlyphNamesFromCmap()
|
||
|
|
else:
|
||
|
|
self.glyphOrder = glyphOrder
|
||
|
|
else:
|
||
|
|
self._getGlyphNamesFromCmap()
|
||
|
|
return self.glyphOrder
|
||
|
|
|
||
|
|
def _getGlyphNamesFromCmap(self):
|
||
|
|
#
|
||
|
|
# This is rather convoluted, but then again, it's an interesting problem:
|
||
|
|
# - we need to use the unicode values found in the cmap table to
|
||
|
|
# build glyph names (eg. because there is only a minimal post table,
|
||
|
|
# or none at all).
|
||
|
|
# - but the cmap parser also needs glyph names to work with...
|
||
|
|
# So here's what we do:
|
||
|
|
# - make up glyph names based on glyphID
|
||
|
|
# - load a temporary cmap table based on those names
|
||
|
|
# - extract the unicode values, build the "real" glyph names
|
||
|
|
# - unload the temporary cmap table
|
||
|
|
#
|
||
|
|
if self.isLoaded("cmap"):
|
||
|
|
# Bootstrapping: we're getting called by the cmap parser
|
||
|
|
# itself. This means self.tables['cmap'] contains a partially
|
||
|
|
# loaded cmap, making it impossible to get at a unicode
|
||
|
|
# subtable here. We remove the partially loaded cmap and
|
||
|
|
# restore it later.
|
||
|
|
# This only happens if the cmap table is loaded before any
|
||
|
|
# other table that does f.getGlyphOrder() or f.getGlyphName().
|
||
|
|
cmapLoading = self.tables["cmap"]
|
||
|
|
del self.tables["cmap"]
|
||
|
|
else:
|
||
|
|
cmapLoading = None
|
||
|
|
# Make up glyph names based on glyphID, which will be used by the
|
||
|
|
# temporary cmap and by the real cmap in case we don't find a unicode
|
||
|
|
# cmap.
|
||
|
|
numGlyphs = int(self["maxp"].numGlyphs)
|
||
|
|
glyphOrder = [None] * numGlyphs
|
||
|
|
glyphOrder[0] = ".notdef"
|
||
|
|
for i in range(1, numGlyphs):
|
||
|
|
glyphOrder[i] = "glyph%.5d" % i
|
||
|
|
# Set the glyph order, so the cmap parser has something
|
||
|
|
# to work with (so we don't get called recursively).
|
||
|
|
self.glyphOrder = glyphOrder
|
||
|
|
|
||
|
|
# Make up glyph names based on the reversed cmap table. Because some
|
||
|
|
# glyphs (eg. ligatures or alternates) may not be reachable via cmap,
|
||
|
|
# this naming table will usually not cover all glyphs in the font.
|
||
|
|
# If the font has no Unicode cmap table, reversecmap will be empty.
|
||
|
|
if "cmap" in self:
|
||
|
|
reversecmap = self["cmap"].buildReversed()
|
||
|
|
else:
|
||
|
|
reversecmap = {}
|
||
|
|
useCount = {}
|
||
|
|
for i in range(numGlyphs):
|
||
|
|
tempName = glyphOrder[i]
|
||
|
|
if tempName in reversecmap:
|
||
|
|
# If a font maps both U+0041 LATIN CAPITAL LETTER A and
|
||
|
|
# U+0391 GREEK CAPITAL LETTER ALPHA to the same glyph,
|
||
|
|
# we prefer naming the glyph as "A".
|
||
|
|
glyphName = self._makeGlyphName(min(reversecmap[tempName]))
|
||
|
|
numUses = useCount[glyphName] = useCount.get(glyphName, 0) + 1
|
||
|
|
if numUses > 1:
|
||
|
|
glyphName = "%s.alt%d" % (glyphName, numUses - 1)
|
||
|
|
glyphOrder[i] = glyphName
|
||
|
|
|
||
|
|
if "cmap" in self:
|
||
|
|
# Delete the temporary cmap table from the cache, so it can
|
||
|
|
# be parsed again with the right names.
|
||
|
|
del self.tables["cmap"]
|
||
|
|
self.glyphOrder = glyphOrder
|
||
|
|
if cmapLoading:
|
||
|
|
# restore partially loaded cmap, so it can continue loading
|
||
|
|
# using the proper names.
|
||
|
|
self.tables["cmap"] = cmapLoading
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def _makeGlyphName(codepoint):
|
||
|
|
from fontTools import agl # Adobe Glyph List
|
||
|
|
|
||
|
|
if codepoint in agl.UV2AGL:
|
||
|
|
return agl.UV2AGL[codepoint]
|
||
|
|
elif codepoint <= 0xFFFF:
|
||
|
|
return "uni%04X" % codepoint
|
||
|
|
else:
|
||
|
|
return "u%X" % codepoint
|
||
|
|
|
||
|
|
def getGlyphNames(self):
|
||
|
|
"""Get a list of glyph names, sorted alphabetically."""
|
||
|
|
glyphNames = sorted(self.getGlyphOrder())
|
||
|
|
return glyphNames
|
||
|
|
|
||
|
|
def getGlyphNames2(self):
|
||
|
|
"""Get a list of glyph names, sorted alphabetically,
|
||
|
|
but not case sensitive.
|
||
|
|
"""
|
||
|
|
from fontTools.misc import textTools
|
||
|
|
|
||
|
|
return textTools.caselessSort(self.getGlyphOrder())
|
||
|
|
|
||
|
|
def getGlyphName(self, glyphID):
|
||
|
|
"""Returns the name for the glyph with the given ID.
|
||
|
|
|
||
|
|
If no name is available, synthesises one with the form ``glyphXXXXX``` where
|
||
|
|
```XXXXX`` is the zero-padded glyph ID.
|
||
|
|
"""
|
||
|
|
try:
|
||
|
|
return self.getGlyphOrder()[glyphID]
|
||
|
|
except IndexError:
|
||
|
|
return "glyph%.5d" % glyphID
|
||
|
|
|
||
|
|
def getGlyphNameMany(self, lst):
|
||
|
|
"""Converts a list of glyph IDs into a list of glyph names."""
|
||
|
|
glyphOrder = self.getGlyphOrder()
|
||
|
|
cnt = len(glyphOrder)
|
||
|
|
return [glyphOrder[gid] if gid < cnt else "glyph%.5d" % gid for gid in lst]
|
||
|
|
|
||
|
|
def getGlyphID(self, glyphName):
|
||
|
|
"""Returns the ID of the glyph with the given name."""
|
||
|
|
try:
|
||
|
|
return self.getReverseGlyphMap()[glyphName]
|
||
|
|
except KeyError:
|
||
|
|
if glyphName[:5] == "glyph":
|
||
|
|
try:
|
||
|
|
return int(glyphName[5:])
|
||
|
|
except (NameError, ValueError):
|
||
|
|
raise KeyError(glyphName)
|
||
|
|
raise
|
||
|
|
|
||
|
|
def getGlyphIDMany(self, lst):
|
||
|
|
"""Converts a list of glyph names into a list of glyph IDs."""
|
||
|
|
d = self.getReverseGlyphMap()
|
||
|
|
try:
|
||
|
|
return [d[glyphName] for glyphName in lst]
|
||
|
|
except KeyError:
|
||
|
|
getGlyphID = self.getGlyphID
|
||
|
|
return [getGlyphID(glyphName) for glyphName in lst]
|
||
|
|
|
||
|
|
def getReverseGlyphMap(self, rebuild=False):
|
||
|
|
"""Returns a mapping of glyph names to glyph IDs."""
|
||
|
|
if rebuild or not hasattr(self, "_reverseGlyphOrderDict"):
|
||
|
|
self._buildReverseGlyphOrderDict()
|
||
|
|
return self._reverseGlyphOrderDict
|
||
|
|
|
||
|
|
def _buildReverseGlyphOrderDict(self):
|
||
|
|
self._reverseGlyphOrderDict = d = {}
|
||
|
|
for glyphID, glyphName in enumerate(self.getGlyphOrder()):
|
||
|
|
d[glyphName] = glyphID
|
||
|
|
return d
|
||
|
|
|
||
|
|
def _writeTable(self, tag, writer, done, tableCache=None):
|
||
|
|
"""Internal helper function for self.save(). Keeps track of
|
||
|
|
inter-table dependencies.
|
||
|
|
"""
|
||
|
|
if tag in done:
|
||
|
|
return
|
||
|
|
tableClass = getTableClass(tag)
|
||
|
|
for masterTable in tableClass.dependencies:
|
||
|
|
if masterTable not in done:
|
||
|
|
if masterTable in self:
|
||
|
|
self._writeTable(masterTable, writer, done, tableCache)
|
||
|
|
else:
|
||
|
|
done.append(masterTable)
|
||
|
|
done.append(tag)
|
||
|
|
tabledata = self.getTableData(tag)
|
||
|
|
if tableCache is not None:
|
||
|
|
entry = tableCache.get((Tag(tag), tabledata))
|
||
|
|
if entry is not None:
|
||
|
|
log.debug("reusing '%s' table", tag)
|
||
|
|
writer.setEntry(tag, entry)
|
||
|
|
return
|
||
|
|
log.debug("Writing '%s' table to disk", tag)
|
||
|
|
writer[tag] = tabledata
|
||
|
|
if tableCache is not None:
|
||
|
|
tableCache[(Tag(tag), tabledata)] = writer[tag]
|
||
|
|
|
||
|
|
def getTableData(self, tag):
|
||
|
|
"""Returns the binary representation of a table.
|
||
|
|
|
||
|
|
If the table is currently loaded and in memory, the data is compiled to
|
||
|
|
binary and returned; if it is not currently loaded, the binary data is
|
||
|
|
read from the font file and returned.
|
||
|
|
"""
|
||
|
|
tag = Tag(tag)
|
||
|
|
if self.isLoaded(tag):
|
||
|
|
log.debug("Compiling '%s' table", tag)
|
||
|
|
return self.tables[tag].compile(self)
|
||
|
|
elif self.reader and tag in self.reader:
|
||
|
|
log.debug("Reading '%s' table from disk", tag)
|
||
|
|
return self.reader[tag]
|
||
|
|
else:
|
||
|
|
raise KeyError(tag)
|
||
|
|
|
||
|
|
def getGlyphSet(
|
||
|
|
self, preferCFF=True, location=None, normalized=False, recalcBounds=True
|
||
|
|
):
|
||
|
|
"""Return a generic GlyphSet, which is a dict-like object
|
||
|
|
mapping glyph names to glyph objects. The returned glyph objects
|
||
|
|
have a ``.draw()`` method that supports the Pen protocol, and will
|
||
|
|
have an attribute named 'width'.
|
||
|
|
|
||
|
|
If the font is CFF-based, the outlines will be taken from the ``CFF ``
|
||
|
|
or ``CFF2`` tables. Otherwise the outlines will be taken from the
|
||
|
|
``glyf`` table.
|
||
|
|
|
||
|
|
If the font contains both a ``CFF ``/``CFF2`` and a ``glyf`` table, you
|
||
|
|
can use the ``preferCFF`` argument to specify which one should be taken.
|
||
|
|
If the font contains both a ``CFF `` and a ``CFF2`` table, the latter is
|
||
|
|
taken.
|
||
|
|
|
||
|
|
If the ``location`` parameter is set, it should be a dictionary mapping
|
||
|
|
four-letter variation tags to their float values, and the returned
|
||
|
|
glyph-set will represent an instance of a variable font at that
|
||
|
|
location.
|
||
|
|
|
||
|
|
If the ``normalized`` variable is set to True, that location is
|
||
|
|
interpreted as in the normalized (-1..+1) space, otherwise it is in the
|
||
|
|
font's defined axes space.
|
||
|
|
"""
|
||
|
|
if location and "fvar" not in self:
|
||
|
|
location = None
|
||
|
|
if location and not normalized:
|
||
|
|
location = self.normalizeLocation(location)
|
||
|
|
if ("CFF " in self or "CFF2" in self) and (preferCFF or "glyf" not in self):
|
||
|
|
return _TTGlyphSetCFF(self, location)
|
||
|
|
elif "glyf" in self:
|
||
|
|
return _TTGlyphSetGlyf(self, location, recalcBounds=recalcBounds)
|
||
|
|
else:
|
||
|
|
raise TTLibError("Font contains no outlines")
|
||
|
|
|
||
|
|
def normalizeLocation(self, location):
|
||
|
|
"""Normalize a ``location`` from the font's defined axes space (also
|
||
|
|
known as user space) into the normalized (-1..+1) space. It applies
|
||
|
|
``avar`` mapping if the font contains an ``avar`` table.
|
||
|
|
|
||
|
|
The ``location`` parameter should be a dictionary mapping four-letter
|
||
|
|
variation tags to their float values.
|
||
|
|
|
||
|
|
Raises ``TTLibError`` if the font is not a variable font.
|
||
|
|
"""
|
||
|
|
from fontTools.varLib.models import normalizeLocation, piecewiseLinearMap
|
||
|
|
|
||
|
|
if "fvar" not in self:
|
||
|
|
raise TTLibError("Not a variable font")
|
||
|
|
|
||
|
|
axes = {
|
||
|
|
a.axisTag: (a.minValue, a.defaultValue, a.maxValue)
|
||
|
|
for a in self["fvar"].axes
|
||
|
|
}
|
||
|
|
location = normalizeLocation(location, axes)
|
||
|
|
if "avar" in self:
|
||
|
|
avar = self["avar"]
|
||
|
|
avarSegments = avar.segments
|
||
|
|
mappedLocation = {}
|
||
|
|
for axisTag, value in location.items():
|
||
|
|
avarMapping = avarSegments.get(axisTag, None)
|
||
|
|
if avarMapping is not None:
|
||
|
|
value = piecewiseLinearMap(value, avarMapping)
|
||
|
|
mappedLocation[axisTag] = value
|
||
|
|
location = mappedLocation
|
||
|
|
return location
|
||
|
|
|
||
|
|
def getBestCmap(
|
||
|
|
self,
|
||
|
|
cmapPreferences=(
|
||
|
|
(3, 10),
|
||
|
|
(0, 6),
|
||
|
|
(0, 4),
|
||
|
|
(3, 1),
|
||
|
|
(0, 3),
|
||
|
|
(0, 2),
|
||
|
|
(0, 1),
|
||
|
|
(0, 0),
|
||
|
|
),
|
||
|
|
):
|
||
|
|
"""Returns the 'best' Unicode cmap dictionary available in the font
|
||
|
|
or ``None``, if no Unicode cmap subtable is available.
|
||
|
|
|
||
|
|
By default it will search for the following (platformID, platEncID)
|
||
|
|
pairs in order::
|
||
|
|
|
||
|
|
(3, 10), # Windows Unicode full repertoire
|
||
|
|
(0, 6), # Unicode full repertoire (format 13 subtable)
|
||
|
|
(0, 4), # Unicode 2.0 full repertoire
|
||
|
|
(3, 1), # Windows Unicode BMP
|
||
|
|
(0, 3), # Unicode 2.0 BMP
|
||
|
|
(0, 2), # Unicode ISO/IEC 10646
|
||
|
|
(0, 1), # Unicode 1.1
|
||
|
|
(0, 0) # Unicode 1.0
|
||
|
|
|
||
|
|
This particular order matches what HarfBuzz uses to choose what
|
||
|
|
subtable to use by default. This order prefers the largest-repertoire
|
||
|
|
subtable, and among those, prefers the Windows-platform over the
|
||
|
|
Unicode-platform as the former has wider support.
|
||
|
|
|
||
|
|
This order can be customized via the ``cmapPreferences`` argument.
|
||
|
|
"""
|
||
|
|
return self["cmap"].getBestCmap(cmapPreferences=cmapPreferences)
|
||
|
|
|
||
|
|
def reorderGlyphs(self, new_glyph_order):
|
||
|
|
from .reorderGlyphs import reorderGlyphs
|
||
|
|
|
||
|
|
reorderGlyphs(self, new_glyph_order)
|
||
|
|
|
||
|
|
|
||
|
|
class GlyphOrder(object):
|
||
|
|
"""A pseudo table. The glyph order isn't in the font as a separate
|
||
|
|
table, but it's nice to present it as such in the TTX format.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, tag=None):
|
||
|
|
pass
|
||
|
|
|
||
|
|
def toXML(self, writer, ttFont):
|
||
|
|
glyphOrder = ttFont.getGlyphOrder()
|
||
|
|
writer.comment(
|
||
|
|
"The 'id' attribute is only for humans; " "it is ignored when parsed."
|
||
|
|
)
|
||
|
|
writer.newline()
|
||
|
|
for i in range(len(glyphOrder)):
|
||
|
|
glyphName = glyphOrder[i]
|
||
|
|
writer.simpletag("GlyphID", id=i, name=glyphName)
|
||
|
|
writer.newline()
|
||
|
|
|
||
|
|
def fromXML(self, name, attrs, content, ttFont):
|
||
|
|
if not hasattr(self, "glyphOrder"):
|
||
|
|
self.glyphOrder = []
|
||
|
|
if name == "GlyphID":
|
||
|
|
self.glyphOrder.append(attrs["name"])
|
||
|
|
ttFont.setGlyphOrder(self.glyphOrder)
|
||
|
|
|
||
|
|
|
||
|
|
def getTableModule(tag):
|
||
|
|
"""Fetch the packer/unpacker module for a table.
|
||
|
|
Return None when no module is found.
|
||
|
|
"""
|
||
|
|
from . import tables
|
||
|
|
|
||
|
|
pyTag = tagToIdentifier(tag)
|
||
|
|
try:
|
||
|
|
__import__("fontTools.ttLib.tables." + pyTag)
|
||
|
|
except ImportError as err:
|
||
|
|
# If pyTag is found in the ImportError message,
|
||
|
|
# means table is not implemented. If it's not
|
||
|
|
# there, then some other module is missing, don't
|
||
|
|
# suppress the error.
|
||
|
|
if str(err).find(pyTag) >= 0:
|
||
|
|
return None
|
||
|
|
else:
|
||
|
|
raise err
|
||
|
|
else:
|
||
|
|
return getattr(tables, pyTag)
|
||
|
|
|
||
|
|
|
||
|
|
# Registry for custom table packer/unpacker classes. Keys are table
|
||
|
|
# tags, values are (moduleName, className) tuples.
|
||
|
|
# See registerCustomTableClass() and getCustomTableClass()
|
||
|
|
_customTableRegistry = {}
|
||
|
|
|
||
|
|
|
||
|
|
def registerCustomTableClass(tag, moduleName, className=None):
|
||
|
|
"""Register a custom packer/unpacker class for a table.
|
||
|
|
|
||
|
|
The 'moduleName' must be an importable module. If no 'className'
|
||
|
|
is given, it is derived from the tag, for example it will be
|
||
|
|
``table_C_U_S_T_`` for a 'CUST' tag.
|
||
|
|
|
||
|
|
The registered table class should be a subclass of
|
||
|
|
:py:class:`fontTools.ttLib.tables.DefaultTable.DefaultTable`
|
||
|
|
"""
|
||
|
|
if className is None:
|
||
|
|
className = "table_" + tagToIdentifier(tag)
|
||
|
|
_customTableRegistry[tag] = (moduleName, className)
|
||
|
|
|
||
|
|
|
||
|
|
def unregisterCustomTableClass(tag):
|
||
|
|
"""Unregister the custom packer/unpacker class for a table."""
|
||
|
|
del _customTableRegistry[tag]
|
||
|
|
|
||
|
|
|
||
|
|
def getCustomTableClass(tag):
|
||
|
|
"""Return the custom table class for tag, if one has been registered
|
||
|
|
with 'registerCustomTableClass()'. Else return None.
|
||
|
|
"""
|
||
|
|
if tag not in _customTableRegistry:
|
||
|
|
return None
|
||
|
|
import importlib
|
||
|
|
|
||
|
|
moduleName, className = _customTableRegistry[tag]
|
||
|
|
module = importlib.import_module(moduleName)
|
||
|
|
return getattr(module, className)
|
||
|
|
|
||
|
|
|
||
|
|
def getTableClass(tag):
|
||
|
|
"""Fetch the packer/unpacker class for a table."""
|
||
|
|
tableClass = getCustomTableClass(tag)
|
||
|
|
if tableClass is not None:
|
||
|
|
return tableClass
|
||
|
|
module = getTableModule(tag)
|
||
|
|
if module is None:
|
||
|
|
from .tables.DefaultTable import DefaultTable
|
||
|
|
|
||
|
|
return DefaultTable
|
||
|
|
pyTag = tagToIdentifier(tag)
|
||
|
|
tableClass = getattr(module, "table_" + pyTag)
|
||
|
|
return tableClass
|
||
|
|
|
||
|
|
|
||
|
|
def getClassTag(klass):
|
||
|
|
"""Fetch the table tag for a class object."""
|
||
|
|
name = klass.__name__
|
||
|
|
assert name[:6] == "table_"
|
||
|
|
name = name[6:] # Chop 'table_'
|
||
|
|
return identifierToTag(name)
|
||
|
|
|
||
|
|
|
||
|
|
def newTable(tag):
|
||
|
|
"""Return a new instance of a table."""
|
||
|
|
tableClass = getTableClass(tag)
|
||
|
|
return tableClass(tag)
|
||
|
|
|
||
|
|
|
||
|
|
def _escapechar(c):
|
||
|
|
"""Helper function for tagToIdentifier()"""
|
||
|
|
import re
|
||
|
|
|
||
|
|
if re.match("[a-z0-9]", c):
|
||
|
|
return "_" + c
|
||
|
|
elif re.match("[A-Z]", c):
|
||
|
|
return c + "_"
|
||
|
|
else:
|
||
|
|
return hex(byteord(c))[2:]
|
||
|
|
|
||
|
|
|
||
|
|
def tagToIdentifier(tag):
|
||
|
|
"""Convert a table tag to a valid (but UGLY) python identifier,
|
||
|
|
as well as a filename that's guaranteed to be unique even on a
|
||
|
|
caseless file system. Each character is mapped to two characters.
|
||
|
|
Lowercase letters get an underscore before the letter, uppercase
|
||
|
|
letters get an underscore after the letter. Trailing spaces are
|
||
|
|
trimmed. Illegal characters are escaped as two hex bytes. If the
|
||
|
|
result starts with a number (as the result of a hex escape), an
|
||
|
|
extra underscore is prepended. Examples::
|
||
|
|
|
||
|
|
>>> tagToIdentifier('glyf')
|
||
|
|
'_g_l_y_f'
|
||
|
|
>>> tagToIdentifier('cvt ')
|
||
|
|
'_c_v_t'
|
||
|
|
>>> tagToIdentifier('OS/2')
|
||
|
|
'O_S_2f_2'
|
||
|
|
"""
|
||
|
|
import re
|
||
|
|
|
||
|
|
tag = Tag(tag)
|
||
|
|
if tag == "GlyphOrder":
|
||
|
|
return tag
|
||
|
|
assert len(tag) == 4, "tag should be 4 characters long"
|
||
|
|
while len(tag) > 1 and tag[-1] == " ":
|
||
|
|
tag = tag[:-1]
|
||
|
|
ident = ""
|
||
|
|
for c in tag:
|
||
|
|
ident = ident + _escapechar(c)
|
||
|
|
if re.match("[0-9]", ident):
|
||
|
|
ident = "_" + ident
|
||
|
|
return ident
|
||
|
|
|
||
|
|
|
||
|
|
def identifierToTag(ident):
|
||
|
|
"""the opposite of tagToIdentifier()"""
|
||
|
|
if ident == "GlyphOrder":
|
||
|
|
return ident
|
||
|
|
if len(ident) % 2 and ident[0] == "_":
|
||
|
|
ident = ident[1:]
|
||
|
|
assert not (len(ident) % 2)
|
||
|
|
tag = ""
|
||
|
|
for i in range(0, len(ident), 2):
|
||
|
|
if ident[i] == "_":
|
||
|
|
tag = tag + ident[i + 1]
|
||
|
|
elif ident[i + 1] == "_":
|
||
|
|
tag = tag + ident[i]
|
||
|
|
else:
|
||
|
|
# assume hex
|
||
|
|
tag = tag + chr(int(ident[i : i + 2], 16))
|
||
|
|
# append trailing spaces
|
||
|
|
tag = tag + (4 - len(tag)) * " "
|
||
|
|
return Tag(tag)
|
||
|
|
|
||
|
|
|
||
|
|
def tagToXML(tag):
|
||
|
|
"""Similarly to tagToIdentifier(), this converts a TT tag
|
||
|
|
to a valid XML element name. Since XML element names are
|
||
|
|
case sensitive, this is a fairly simple/readable translation.
|
||
|
|
"""
|
||
|
|
import re
|
||
|
|
|
||
|
|
tag = Tag(tag)
|
||
|
|
if tag == "OS/2":
|
||
|
|
return "OS_2"
|
||
|
|
elif tag == "GlyphOrder":
|
||
|
|
return tag
|
||
|
|
if re.match("[A-Za-z_][A-Za-z_0-9]* *$", tag):
|
||
|
|
return tag.strip()
|
||
|
|
else:
|
||
|
|
return tagToIdentifier(tag)
|
||
|
|
|
||
|
|
|
||
|
|
def xmlToTag(tag):
|
||
|
|
"""The opposite of tagToXML()"""
|
||
|
|
if tag == "OS_2":
|
||
|
|
return Tag("OS/2")
|
||
|
|
if len(tag) == 8:
|
||
|
|
return identifierToTag(tag)
|
||
|
|
else:
|
||
|
|
return Tag(tag + " " * (4 - len(tag)))
|
||
|
|
|
||
|
|
|
||
|
|
# Table order as recommended in the OpenType specification 1.4
|
||
|
|
TTFTableOrder = [
|
||
|
|
"head",
|
||
|
|
"hhea",
|
||
|
|
"maxp",
|
||
|
|
"OS/2",
|
||
|
|
"hmtx",
|
||
|
|
"LTSH",
|
||
|
|
"VDMX",
|
||
|
|
"hdmx",
|
||
|
|
"cmap",
|
||
|
|
"fpgm",
|
||
|
|
"prep",
|
||
|
|
"cvt ",
|
||
|
|
"loca",
|
||
|
|
"glyf",
|
||
|
|
"kern",
|
||
|
|
"name",
|
||
|
|
"post",
|
||
|
|
"gasp",
|
||
|
|
"PCLT",
|
||
|
|
]
|
||
|
|
|
||
|
|
OTFTableOrder = ["head", "hhea", "maxp", "OS/2", "name", "cmap", "post", "CFF "]
|
||
|
|
|
||
|
|
|
||
|
|
def sortedTagList(tagList, tableOrder=None):
|
||
|
|
"""Return a sorted copy of tagList, sorted according to the OpenType
|
||
|
|
specification, or according to a custom tableOrder. If given and not
|
||
|
|
None, tableOrder needs to be a list of tag names.
|
||
|
|
"""
|
||
|
|
tagList = sorted(tagList)
|
||
|
|
if tableOrder is None:
|
||
|
|
if "DSIG" in tagList:
|
||
|
|
# DSIG should be last (XXX spec reference?)
|
||
|
|
tagList.remove("DSIG")
|
||
|
|
tagList.append("DSIG")
|
||
|
|
if "CFF " in tagList:
|
||
|
|
tableOrder = OTFTableOrder
|
||
|
|
else:
|
||
|
|
tableOrder = TTFTableOrder
|
||
|
|
orderedTables = []
|
||
|
|
for tag in tableOrder:
|
||
|
|
if tag in tagList:
|
||
|
|
orderedTables.append(tag)
|
||
|
|
tagList.remove(tag)
|
||
|
|
orderedTables.extend(tagList)
|
||
|
|
return orderedTables
|
||
|
|
|
||
|
|
|
||
|
|
def reorderFontTables(inFile, outFile, tableOrder=None, checkChecksums=False):
|
||
|
|
"""Rewrite a font file, ordering the tables as recommended by the
|
||
|
|
OpenType specification 1.4.
|
||
|
|
"""
|
||
|
|
inFile.seek(0)
|
||
|
|
outFile.seek(0)
|
||
|
|
reader = SFNTReader(inFile, checkChecksums=checkChecksums)
|
||
|
|
writer = SFNTWriter(
|
||
|
|
outFile,
|
||
|
|
len(reader.tables),
|
||
|
|
reader.sfntVersion,
|
||
|
|
reader.flavor,
|
||
|
|
reader.flavorData,
|
||
|
|
)
|
||
|
|
tables = list(reader.keys())
|
||
|
|
for tag in sortedTagList(tables, tableOrder):
|
||
|
|
writer[tag] = reader[tag]
|
||
|
|
writer.close()
|
||
|
|
|
||
|
|
|
||
|
|
def maxPowerOfTwo(x):
|
||
|
|
"""Return the highest exponent of two, so that
|
||
|
|
(2 ** exponent) <= x. Return 0 if x is 0.
|
||
|
|
"""
|
||
|
|
exponent = 0
|
||
|
|
while x:
|
||
|
|
x = x >> 1
|
||
|
|
exponent = exponent + 1
|
||
|
|
return max(exponent - 1, 0)
|
||
|
|
|
||
|
|
|
||
|
|
def getSearchRange(n, itemSize=16):
|
||
|
|
"""Calculate searchRange, entrySelector, rangeShift."""
|
||
|
|
# itemSize defaults to 16, for backward compatibility
|
||
|
|
# with upstream fonttools.
|
||
|
|
exponent = maxPowerOfTwo(n)
|
||
|
|
searchRange = (2**exponent) * itemSize
|
||
|
|
entrySelector = exponent
|
||
|
|
rangeShift = max(0, n * itemSize - searchRange)
|
||
|
|
return searchRange, entrySelector, rangeShift
|