[coretext] Don't generate notdef glyph for default-ignorables
As discovered on Chrome Mac:
https://code.google.com/p/chromium/issues/detail?id=452326
diff --git a/src/hb-coretext.cc b/src/hb-coretext.cc
index 4a1e14c..4a45175 100644
--- a/src/hb-coretext.cc
+++ b/src/hb-coretext.cc
@@ -897,6 +897,8 @@
* for this one. */
continue;
}
+ if (buffer->unicode->is_default_ignorable (ch))
+ continue;
info->codepoint = notdef;
info->cluster = log_clusters[j];
diff --git a/src/hb-ot-shape.cc b/src/hb-ot-shape.cc
index a0b503a..07adb04 100644
--- a/src/hb-ot-shape.cc
+++ b/src/hb-ot-shape.cc
@@ -676,7 +676,7 @@
pos[i].y_advance = 0;
}
else
- continue; /* Delete it. */
+ continue; /* Delete it. XXX Merge clusters? */
}
if (j != i)
{
