1 files changed, 105 insertions, 0 deletions
diff --git a/share/extensions/layers2svgfont.py b/share/extensions/layers2svgfont.py
new file mode 100755
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+++ b/share/extensions/layers2svgfont.py
@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+# 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.
+#
+"""Convert known layer structures to svg font glyphs"""
+
+import inkex
+from inkex import SVGfont, FontFace, Glyph
+
+
+class LayersToSvgFont(inkex.EffectExtension):
+    """Convert layers to an svg font"""
+
+    def guideline_value(self, label, index):
+        for guide in self.svg.namedview.get_guides():
+            if guide.label == label:
+                return guide.point[index]
+        return 0
+
+    def flip_cordinate_system(self, path, emsize, baseline):
+        """Flip Y axis because SVG fonts use a different orientation than regular SVG"""
+        path = path.copy()
+        path.transform.add_scale(1, -1)
+        path.transform.add_translate(0, int(emsize) - int(baseline))
+        path.apply_transform()
+        return str(path.path)
+
+    def effect(self):
+        """Main extension code"""
+        emsize = int(float(self.svg.get("width")))
+        baseline = self.guideline_value("baseline", 1)
+        ascender = self.guideline_value("ascender", 1) - baseline
+        caps = self.guideline_value("caps", 1) - baseline
+        xheight = self.guideline_value("xheight", 1) - baseline
+        descender = baseline - self.guideline_value("descender", 1)
+
+        font = self.svg.defs.get_or_create("svg:font", SVGfont)
+        font.set("horiz-adv-x", str(emsize))
+        font.set("horiz-origin-y", str(baseline))
+
+        fontface = font.get_or_create("font-face", FontFace)
+        fontface.set("font-family", "SVGFont")
+        fontface.set("units-per-em", str(emsize))
+        fontface.set("cap-height", str(caps))
+        fontface.set("x-height", str(xheight))
+        fontface.set("ascent", str(ascender))
+        fontface.set("descent", str(descender))
+
+        for group in self.svg.findall("svg:g"):
+            label = group.label
+            if "GlyphLayer-" in label:
+                unicode_char = label.split("GlyphLayer-")[1]
+                if unicode_char == "'":
+                    glyph = font.get_or_create("""svg:glyph[@unicode="'"]""", Glyph)
+                else:
+                    glyph = font.get_or_create(
+                        "svg:glyph[@unicode='{}']".format(unicode_char), Glyph
+                    )
+                glyph.set("unicode", unicode_char)
+
+                ############################
+                # Option 1:
+                # Using clone (svg:use) as childnode of svg:glyph
+
+                # use = glyph.get_or_create('svg:use', UseElement)
+                # use.set('xlink:href', "#"+group.get("id"))
+                # TODO: This creates <use> nodes; why do they do not render on svg fonts dialog?
+
+                ############################
+                # Option 2:
+                # Using svg:paths as childnodes of svg:glyph
+
+                # for p in group.findall('svg:path'):
+                #    d = p.get("d")
+                #    d = self.flip_cordinate_system(d, emsize, baseline)
+                #    path = glyph.add(PathElement())
+                #    path.set("d", d)
+
+                ############################
+                # Option 3:
+                # Using curve description in d attribute of svg:glyph
+
+                path_d = ""
+                for path in group.findall("svg:path"):
+                    path_d += " " + self.flip_cordinate_system(path, emsize, baseline)
+                glyph.set("d", path_d)
+
+
+if __name__ == "__main__":
+    LayersToSvgFont().run()