1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
from fontTools.misc.roundTools import noRound
from fontTools.ttLib import TTFont, newTable
from fontTools.ttLib.tables import otTables as ot
from fontTools.ttLib.tables.otBase import OTTableWriter
from fontTools.varLib import HVAR_FIELDS, VVAR_FIELDS, _add_VHVAR
from fontTools.varLib import builder, models, varStore
from fontTools.misc.fixedTools import fixedToFloat as fi2fl
from fontTools.misc.cliTools import makeOutputFileName
from functools import partial
import logging
log = logging.getLogger("fontTools.varLib.avar")
def _get_advance_metrics(font, axisTags, tableFields):
# There's two ways we can go from here:
# 1. For each glyph, at each master peak, compute the value of the
# advance width at that peak. Then pass these all to a VariationModel
# builder to compute back the deltas.
# 2. For each master peak, pull out the deltas of the advance width directly,
# and feed these to the VarStoreBuilder, forgoing the remoding step.
# We'll go with the second option, as it's simpler, faster, and more direct.
gvar = font["gvar"]
vhAdvanceDeltasAndSupports = {}
glyphOrder = font.getGlyphOrder()
phantomIndex = tableFields.phantomIndex
for glyphName in glyphOrder:
supports = []
deltas = []
variations = gvar.variations.get(glyphName, [])
for tv in variations:
supports.append(tv.axes)
phantoms = tv.coordinates[-4:]
phantoms = phantoms[phantomIndex * 2 : phantomIndex * 2 + 2]
assert len(phantoms) == 2
phantoms[0] = phantoms[0][phantomIndex] if phantoms[0] is not None else 0
phantoms[1] = phantoms[1][phantomIndex] if phantoms[1] is not None else 0
deltas.append(phantoms[1] - phantoms[0])
vhAdvanceDeltasAndSupports[glyphName] = (deltas, supports)
vOrigDeltasAndSupports = None # TODO
return vhAdvanceDeltasAndSupports, vOrigDeltasAndSupports
def add_HVAR(font):
if "HVAR" in font:
del font["HVAR"]
axisTags = [axis.axisTag for axis in font["fvar"].axes]
getAdvanceMetrics = partial(_get_advance_metrics, font, axisTags, HVAR_FIELDS)
_add_VHVAR(font, axisTags, HVAR_FIELDS, getAdvanceMetrics)
def add_VVAR(font):
if "VVAR" in font:
del font["VVAR"]
getAdvanceMetrics = partial(_get_advance_metrics, font, axisTags, HVAR_FIELDS)
axisTags = [axis.axisTag for axis in font["fvar"].axes]
_add_VHVAR(font, axisTags, VVAR_FIELDS, getAdvanceMetrics)
def main(args=None):
"""Add `HVAR` table to variable font."""
if args is None:
import sys
args = sys.argv[1:]
from fontTools import configLogger
from fontTools.designspaceLib import DesignSpaceDocument
import argparse
parser = argparse.ArgumentParser(
"fonttools varLib.hvar",
description="Add `HVAR` table from to variable font.",
)
parser.add_argument("font", metavar="varfont.ttf", help="Variable-font file.")
parser.add_argument(
"-o",
"--output-file",
type=str,
help="Output font file name.",
)
options = parser.parse_args(args)
configLogger(level="WARNING")
font = TTFont(options.font)
if not "fvar" in font:
log.error("Not a variable font.")
return 1
add_HVAR(font)
if "vmtx" in font:
add_VVAR(font)
if options.output_file is None:
outfile = makeOutputFileName(options.font, overWrite=True, suffix=".hvar")
else:
outfile = options.output_file
if outfile:
log.info("Saving %s", outfile)
font.save(outfile)
if __name__ == "__main__":
import sys
sys.exit(main())
|
