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make _TTGlyph an abstract base class, with draw and drawPoints abstract methods

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This commit is contained in:
Just van Rossum 2022-08-30 11:47:39 +02:00
parent b1441c583b
commit 7ae37322cd
1 changed files with 16 additions and 1 deletions
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17
Lib/fontTools/ttLib/ttGlyphSet.py
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@ -1,5 +1,6 @@
"""GlyphSets returned by a TTFont.""" """GlyphSets returned by a TTFont."""
from abc import ABCMeta, abstractmethod
from collections.abc import Mapping from collections.abc import Mapping
from copy import copy from copy import copy
from fontTools.misc.fixedTools import otRound from fontTools.misc.fixedTools import otRound
@ -75,7 +76,7 @@ class _TTGlyphSetCFF(_TTGlyphSet):
return _TTGlyphCFF(self, glyphName) return _TTGlyphCFF(self, glyphName)
class _TTGlyph: class _TTGlyph(metaclass=ABCMeta):
"""Glyph object that supports the Pen protocol, meaning that it has """Glyph object that supports the Pen protocol, meaning that it has
.draw() and .drawPoints() methods that take a pen object as their only .draw() and .drawPoints() methods that take a pen object as their only
@ -103,6 +104,20 @@ class _TTGlyph:
self.width += glyphSet.hvarInstancer[varidx] self.width += glyphSet.hvarInstancer[varidx]
# TODO: VVAR/VORG # TODO: VVAR/VORG
@abstractmethod
def draw(self, pen):
"""Draw the glyph onto ``pen``. See fontTools.pens.basePen for details
how that works.
"""
raise NotImplementedError
@abstractmethod
def drawPoints(self, pen):
"""Draw the glyph onto ``pen``. See fontTools.pens.pointPen for details
how that works.
"""
raise NotImplementedError
class _TTGlyphGlyf(_TTGlyph): class _TTGlyphGlyf(_TTGlyph):
def draw(self, pen): def draw(self, pen):