[indic] Tweak for old-spec Bengali and halant-ya-halant
Fixes https://github.com/harfbuzz/harfbuzz/issues/1073
diff --git a/src/hb-ot-shape-complex-indic.cc b/src/hb-ot-shape-complex-indic.cc
index 447e36c..8377dae 100644
--- a/src/hb-ot-shape-complex-indic.cc
+++ b/src/hb-ot-shape-complex-indic.cc
@@ -668,8 +668,9 @@
*
* Reports suggest that in some scripts Uniscribe does this only if there
* is *not* a Halant after last consonant already (eg. Kannada), while it
- * does it unconditionally in other scripts (eg. Malayalam). We don't
- * currently know about other scripts, so we single out Malayalam for now.
+ * does it unconditionally in other scripts (eg. Malayalam, Bengali). We
+ * don't currently know about other scripts, so we whitelist Malayalam and
+ * Bengali for now.
*
* Kannada test case:
* U+0C9A,U+0CCD,U+0C9A,U+0CCD
@@ -679,10 +680,16 @@
* Malayalam test case:
* U+0D38,U+0D4D,U+0D31,U+0D4D,U+0D31,U+0D4D
* With lohit-ttf-20121122/Lohit-Malayalam.ttf
+ *
+ * Bengali test case
+ * U+0998,U+09CD,U+09AF,U+09CD
+ * With Windows XP vrinda.ttf
+ * https://github.com/harfbuzz/harfbuzz/issues/1073
*/
if (indic_plan->is_old_spec)
{
- bool disallow_double_halants = buffer->props.script != HB_SCRIPT_MALAYALAM;
+ bool disallow_double_halants = buffer->props.script != HB_SCRIPT_MALAYALAM &&
+ buffer->props.script != HB_SCRIPT_BENGALI;
for (unsigned int i = base + 1; i < end; i++)
if (info[i].indic_category() == OT_H)
{
