fontbuild: now generating three variable fonts: complete family with two axes, italic version with weight axis and upright version with weight axis. This allows supporting browsers like MS Edge which do not correctly map italic and oblique font style properties to slnt and ital axes.

1 files changed, 59 insertions, 0 deletions

diff --git a/misc/fontbuild b/misc/fontbuild
index 998739f35..d272a7aec 100755
--- a/misc/fontbuild
+++ b/misc/fontbuild
@@ -469,6 +469,47 @@ class Main(object):
     font.save(ufo_path)
 
 
+  def _genSubsetDesignSpace(self, designspace, tag, filename):
+    ds = designspace
+    italic = False
+    if tag == 'italic':
+      italic = True
+    elif tag != 'upright':
+      raise Exception('unexpected tag ' + tag)
+
+    for a in ds.axes:
+      if a.tag == "slnt":
+        ds.axes.remove(a)
+        break
+
+    rmlist = []
+    hasDefault = not italic
+    for source in designspace.sources:
+      isitalic = source.name.find('italic') != -1
+      if italic != isitalic:
+        rmlist.append(source)
+      elif italic and not hasDefault:
+        source.copyLib = True
+        source.copyInfo = True
+        source.copyGroups = True
+        source.copyFeatures = True
+        hasDefault = True
+    for source in rmlist:
+      designspace.sources.remove(source)
+
+    rmlist = []
+    for instance in designspace.instances:
+      isitalic = instance.name.find('italic') != -1
+      if italic != isitalic:
+        rmlist.append(instance)
+    for instance in rmlist:
+      designspace.instances.remove(instance)
+
+    self.log("write %s" % relpath(filename, os.getcwd()))
+    ds.write(filename)
+
+
+
   def cmd_glyphsync(self, argv):
     argparser = argparse.ArgumentParser(
       usage='%(prog)s glyphsync <glyphsfile> [options]',
@@ -557,6 +598,24 @@ class Main(object):
     self.log("write %s" % relpath(designspace_file, os.getcwd()))
     designspace.write(designspace_file)
 
+    # upright designspace
+    upright_designspace_file = pjoin(outdir, 'Inter-UI-upright.designspace')
+    p = Process(
+      target=self._genSubsetDesignSpace,
+      args=(designspace, 'upright', upright_designspace_file)
+    )
+    p.start()
+    procs.append(p)
+
+    # italic designspace
+    italic_designspace_file = pjoin(outdir, 'Inter-UI-italic.designspace')
+    p = Process(
+      target=self._genSubsetDesignSpace,
+      args=(designspace, 'italic', italic_designspace_file)
+    )
+    p.start()
+    procs.append(p)
+
     for p in procs:
       p.join()