[varLib] Do not encode gvar deltas that are all zeroes

2017-04-03 18:04:26 +02:00 · 2017-04-03 18:04:26 +02:00 · b572ae6c5b
commit b572ae6c5b
parent 33d57dc2c3
1 changed files with 2 additions and 0 deletions
--- a/Lib/fontTools/varLib/init.py
+++ b/Lib/fontTools/varLib/init.py
@ -186,6 +186,8 @@ def _add_gvar(font, model, master_ttfs):
 		supports = model.supports
 		assert len(deltas) == len(supports)
 		for i,(delta,support) in enumerate(zip(deltas[1:], supports[1:])):
+			if not delta:
+				continue
 			var = TupleVariation(support, delta)
 			gvar.variations[glyph].append(var)