Rework the font processing for Android.

yMin and yMax values needed for Android are now set after the subsetting in
a separate script.  The touchup script is also divided into Android-specific
changes and general ones.

1 files changed, 46 insertions, 0 deletions

diff --git a/scripts/force_yminmax.py b/scripts/force_yminmax.py
new file mode 100755
index 0000000..5644fe4
--- /dev/null
+++ b/scripts/force_yminmax.py
@@ -0,0 +1,46 @@
+#!/usr/bin/python
+"""Post-subset changes for Roboto for Android."""
+
+import sys
+
+from fontTools import ttLib
+
+
+def output_protruding_glyphs(font, ymin, ymax, file_name):
+    """Outputs all glyphs going outside the specified vertical range."""
+    protruding_glyphs = []
+    glyph_dict = font['glyf'].glyphs
+    for glyph_name, glyph in glyph_dict.items():
+        if glyph.numberOfContours == 0:
+            continue
+        if glyph.yMin < ymin or glyph.yMax > ymax:
+            protruding_glyphs.append(glyph_name)
+    if protruding_glyphs:
+        print "Protruding glyphs in %s:" % file_name,
+        print ', '.join(sorted(protruding_glyphs))
+
+
+YMIN = -555
+YMAX = 2163
+
+def main(argv):
+    """Forces yMin/yMax values and generates a new font."""
+    source_font_name = argv[1]
+    target_font_name = argv[2]
+    font = ttLib.TTFont(source_font_name, recalcBBoxes=False)
+
+    head = font['head']
+    head.yMin = YMIN
+    head.yMax = YMAX
+    output_protruding_glyphs(font, YMIN, YMAX, source_font_name)
+
+    font.save(target_font_name)
+
+    # Make sure the values are set correctly
+    font = ttLib.TTFont(target_font_name, recalcBBoxes=False)
+    head = font['head']
+    assert head.yMin == YMIN and head.yMax == YMAX
+
+
+if __name__ == "__main__":
+    main(sys.argv)