[indic] Allow double-halant in old-spec Devanagari
Fixes https://github.com/harfbuzz/harfbuzz/issues/1071
diff --git a/src/hb-ot-shape-complex-indic.cc b/src/hb-ot-shape-complex-indic.cc
index b8d9a3a..4cb69fc 100644
--- a/src/hb-ot-shape-complex-indic.cc
+++ b/src/hb-ot-shape-complex-indic.cc
@@ -667,10 +667,10 @@
* last consonant.
*
* 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, Bengali). We
- * don't currently know about other scripts, so we whitelist Malayalam and
- * Bengali for now.
+ * is *not* a Halant after last consonant already. We know that is the
+ * case for Kannada, while it reorders unconditionally in other scripts,
+ * eg. Malayalam, Bengali, and Devanagari. We don't currently know about
+ * other scripts, so we whitelist Malayalam, Bengali, and Devanagari.
*
* Kannada test case:
* U+0C9A,U+0CCD,U+0C9A,U+0CCD
@@ -681,15 +681,21 @@
* U+0D38,U+0D4D,U+0D31,U+0D4D,U+0D31,U+0D4D
* With lohit-ttf-20121122/Lohit-Malayalam.ttf
*
- * Bengali test case
+ * Bengali test case:
* U+0998,U+09CD,U+09AF,U+09CD
* With Windows XP vrinda.ttf
* https://github.com/harfbuzz/harfbuzz/issues/1073
+ *
+ * Devanagari test case:
+ * U+091F,U+094D,U+0930,U+094D
+ * With chandas.ttf
+ * https://github.com/harfbuzz/harfbuzz/issues/1071
*/
if (indic_plan->is_old_spec)
{
bool disallow_double_halants = buffer->props.script != HB_SCRIPT_MALAYALAM &&
- buffer->props.script != HB_SCRIPT_BENGALI;
+ buffer->props.script != HB_SCRIPT_BENGALI &&
+ buffer->props.script != HB_SCRIPT_DEVANAGARI;
for (unsigned int i = base + 1; i < end; i++)
if (info[i].indic_category() == OT_H)
{
diff --git a/test/shaping/data/in-house/fonts/b722a7d09e60421f3efbc706ad348ab47b88567b.ttf b/test/shaping/data/in-house/fonts/b722a7d09e60421f3efbc706ad348ab47b88567b.ttf
new file mode 100644
index 0000000..ca23ef8
--- /dev/null
+++ b/test/shaping/data/in-house/fonts/b722a7d09e60421f3efbc706ad348ab47b88567b.ttf
Binary files differ
diff --git a/test/shaping/data/in-house/tests/indic-old-spec.tests b/test/shaping/data/in-house/tests/indic-old-spec.tests
index cd56319..eb967ad 100644
--- a/test/shaping/data/in-house/tests/indic-old-spec.tests
+++ b/test/shaping/data/in-house/tests/indic-old-spec.tests
@@ -1,2 +1,4 @@
../fonts/57a9d9f83020155cbb1d2be1f43d82388cbecc88.ttf::U+0C9A,U+0CCD,U+0C9A,U+0CCD:[U0C9A_U0CCD.haln=0+1066|U0C9A_0CCD.blwf=0+0]
../fonts/270b89df543a7e48e206a2d830c0e10e5265c630.ttf::U+0D38,U+0D4D,U+0D31,U+0D4D,U+0D31,U+0D4D:[glyph201=0+1183|U0D4D=0+0]
+../fonts/b722a7d09e60421f3efbc706ad348ab47b88567b.ttf::U+091F,U+094D,U+0930,U+094D,U+0020:[Tra=0+550|virAma=0@-73,-110+0|space=4+500]
+../fonts/b722a7d09e60421f3efbc706ad348ab47b88567b.ttf::U+091F,U+094D,U+0930,U+0942:[Tra=0+550|UT=0@42,-150+0]
