9f5c51897c
We probably don't want to raise errors in init, which allows a drawer to reset the pen state.
112 lines
3.3 KiB
Python
112 lines
3.3 KiB
Python
from __future__ import print_function, division, absolute_import
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from fontTools.misc.py23 import *
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from array import array
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from fontTools.pens.basePen import BasePen
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from fontTools.pens.transformPen import TransformPen
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from fontTools.ttLib.tables import ttProgram
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from fontTools.ttLib.tables._g_l_y_f import Glyph
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from fontTools.ttLib.tables._g_l_y_f import GlyphComponent
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from fontTools.ttLib.tables._g_l_y_f import GlyphCoordinates
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__all__ = ["TTGlyphPen"]
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class TTGlyphPen(BasePen):
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"""Pen used for drawing to a TrueType glyph."""
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def __init__(self, glyphSet):
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super(TTGlyphPen, self).__init__(glyphSet)
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self.init()
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def init(self):
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self.points = []
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self.endPts = []
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self.types = []
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self.components = []
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def _addPoint(self, pt, onCurve):
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self.points.append([int(coord) for coord in pt])
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self.types.append(onCurve)
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def _isClosed(self):
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return (
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(not self.points) or
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(self.endPts and self.endPts[-1] == len(self.points) - 1))
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def _lineTo(self, pt):
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self._addPoint(pt, 1)
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def _moveTo(self, pt):
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assert self._isClosed(), '"move"-type point must begin a new contour.'
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self._addPoint(pt, 1)
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def _qCurveToOne(self, pt1, pt2):
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self._addPoint(pt1, 0)
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self._addPoint(pt2, 1)
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def _closePath(self):
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endPt = len(self.points) - 1
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# ignore anchors
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if endPt == 0 or (self.endPts and endPt == self.endPts[-1] + 1):
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self.points.pop()
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self.types.pop()
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return
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# if the drawer added the first point again, remove it
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startPt = 0
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if self.endPts:
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startPt = self.endPts[-1] + 1
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if self.points[startPt] == self.points[endPt]:
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self.points = self.points[:-1]
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self.types = self.types[:-1]
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endPt -= 1
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self.endPts.append(endPt)
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def _endPath(self):
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# TrueType contours are always "closed"
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self.closePath()
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def addComponent(self, glyphName, transformation):
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self.components.append((glyphName, transformation))
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def glyph(self):
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glyph = Glyph()
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assert self._isClosed(), "Didn't close last contour."
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components = []
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for glyphName, transformation in self.components:
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if self.points:
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# can't have both, so decompose the glyph
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tpen = TransformPen(self, transformation)
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self.glyphSet[glyphName].draw(tpen)
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continue
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component = GlyphComponent()
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component.glyphName = glyphName
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if transformation[:4] != (1, 0, 0, 1):
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component.transform = (transformation[:2], transformation[2:4])
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component.x, component.y = [int(n) for n in transformation[4:]]
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component.flags = 4
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components.append(component)
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glyph.coordinates = GlyphCoordinates(self.points)
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glyph.endPtsOfContours = self.endPts
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glyph.flags = array("B", self.types)
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self.init()
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if components:
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glyph.components = components
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glyph.numberOfContours = -1
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else:
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glyph.numberOfContours = len(glyph.endPtsOfContours)
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glyph.program = ttProgram.Program()
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glyph.program.fromBytecode("")
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return glyph
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