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Merge pull request #25 from googlei18n/reverse-contours

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Add reverse_direction argument
This commit is contained in:
James Godfrey-Kittle 2016-05-11 10:55:50 -07:00
commit c82b78b1b8
1 changed files with 10 additions and 5 deletions
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15
Lib/cu2qu/ufo.py
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@ -27,7 +27,9 @@ the resulting splines are interpolation-compatible.
from __future__ import print_function, division, absolute_import
from fontTools.pens.basePen import AbstractPen
from cu2qu import curve_to_quadratic, curves_to_quadratic
from cu2qu.pens import ReverseContourPen
__all__ = ['fonts_to_quadratic', 'font_to_quadratic']
@ -97,11 +99,13 @@ def _get_segments(glyph):
return pen.segments
def _set_segments(glyph, segments):
def _set_segments(glyph, segments, reverse_direction):
"""Draw segments as extracted by GetSegmentsPen back to a glyph."""
glyph.clearContours()
pen = glyph.getPen()
if reverse_direction:
pen = ReverseContourPen(pen)
for tag, args in segments:
if tag == 'move':
pen.moveTo(*args)
@ -133,7 +137,7 @@ def _segments_to_quadratic(segments, max_err, stats):
return [('qcurve', p) for p in new_points]
def _fonts_to_quadratic(fonts, max_err, stats):
def _fonts_to_quadratic(fonts, max_err, reverse_direction, stats):
"""Do the actual conversion of fonts, after arguments have been set up."""
for glyphs in zip(*fonts):
@ -155,10 +159,11 @@ def _fonts_to_quadratic(fonts, max_err, stats):
new_segments_by_glyph = zip(*new_segments_by_location)
for glyph, new_segments in zip(glyphs, new_segments_by_glyph):
_set_segments(glyph, new_segments)
_set_segments(glyph, new_segments, reverse_direction)
def fonts_to_quadratic(fonts, max_err_em=None, max_err=None,
def fonts_to_quadratic(
fonts, max_err_em=None, max_err=None, reverse_direction=False,
stats=None, dump_stats=False):
"""Convert the curves of a collection of fonts to quadratic.
@ -187,7 +192,7 @@ def fonts_to_quadratic(fonts, max_err_em=None, max_err=None,
num_fonts = len(fonts)
assert len(max_errors) == num_fonts
_fonts_to_quadratic(fonts, max_errors, stats)
_fonts_to_quadratic(fonts, max_errors, reverse_direction, stats)
if dump_stats:
spline_lengths = sorted(stats.keys())