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
114
115
116
117
|
#!/usr/bin/env python3
# coding=utf-8
#
# Copyright (C) 2011 Felipe Correa da Silva Sanches <juca@members.fsf.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
#
# Adapted for the inkstitch lettering module to allow glyph annotations for characters
# in specific positions or settings. Changes: see git history
"""Extension for converting svg fonts to layers"""
from inkex import Layer, PathElement, errormsg
from .base import InkstitchExtension
class LetteringSvgFontToLayers(InkstitchExtension):
"""Convert an svg font to layers"""
def add_arguments(self, pars):
pars.add_argument(
"--count",
type=int,
default=30,
help="Stop making layers after this number of glyphs.",
)
def flip_cordinate_system(self, elem, emsize, baseline):
"""Scale and translate the element's path, returns the path object"""
path = elem.path
path.scale(1, -1, inplace=True)
path.translate(0, int(emsize) - int(baseline), inplace=True)
return path
def effect(self):
# Current code only reads the first svgfont instance
font = self.svg.defs.findone("svg:font")
if font is None:
return errormsg("There are no svg fonts")
# setwidth = font.get("horiz-adv-x")
baseline = font.get("horiz-origin-y")
if baseline is None:
baseline = 0
guidebase = self.svg.viewbox_height - baseline
fontface = font.findone("svg:font-face")
emsize = fontface.get("units-per-em")
# TODO: should we guarantee that <svg:font horiz-adv-x> equals <svg:font-face units-per-em> ?
caps = int(fontface.get("cap-height", 0))
xheight = int(fontface.get("x-height", 0))
ascender = int(fontface.get("ascent", 0))
descender = int(fontface.get("descent", 0))
self.svg.set("width", emsize)
self.svg.namedview.add_guide(guidebase, True, "baseline")
self.svg.namedview.add_guide(guidebase - ascender, True, "ascender")
self.svg.namedview.add_guide(guidebase - caps, True, "caps")
self.svg.namedview.add_guide(guidebase - xheight, True, "xheight")
self.svg.namedview.add_guide(guidebase + descender, True, "decender")
count = 0
for glyph in font.findall("svg:glyph"):
hide_layer = count != 0
self.convert_glyph_to_layer(glyph, emsize, baseline, hide_layer=hide_layer)
count += 1
if count >= self.options.count:
break
def convert_glyph_to_layer(self, glyph, emsize, baseline, hide_layer):
unicode_char = glyph.get("unicode")
glyph_name = glyph.get("glyph-name").split('.')
if unicode_char is None:
if len(glyph_name) == 2:
unicode_char = glyph_name[0]
else:
return
typographic_feature = ''
if len(glyph_name) == 2:
typographic_feature = glyph_name[1]
else:
arabic_form = glyph.get('arabic-form', None)
if arabic_form is not None and len(arabic_form) > 4:
typographic_feature = arabic_form[:4]
if typographic_feature:
typographic_feature = f".{typographic_feature}"
layer = self.svg.add(Layer.new(f"GlyphLayer-{unicode_char}{typographic_feature}"))
# glyph layers (except the first one) are innitially hidden
if hide_layer:
layer.style["display"] = "none"
# Using curve description in d attribute of svg:glyph
path = layer.add(PathElement())
path.path = self.flip_cordinate_system(glyph, emsize, baseline)
if __name__ == "__main__":
LetteringSvgFontToLayers().run()
|
