commit 52a00cd87f63c8ab32413a1a9ce792a3e2ec84e2
author Behdad Esfahbod <behdad@behdad.org> Wed Oct 31 19:05:53 2018 -0700
committer Behdad Esfahbod <behdad@behdad.org> Wed Oct 31 19:06:08 2018 -0700
tree a37f2f40620325957d888f4ca490c952d80615ed
parent 6e3ea269fa1fe0a3de7a8a13c6e853c91231808e

[aat] Implement 'aalt' mapping

Fixes https://github.com/harfbuzz/harfbuzz/issues/1160

src/hb-aat-map.cc

diff --git a/src/hb-aat-map.cc b/src/hb-aat-map.cc
index f2736bf..1ce1b12 100644
--- a/src/hb-aat-map.cc
+++ b/src/hb-aat-map.cc
@@ -34,6 +34,14 @@
 void hb_aat_map_builder_t::add_feature (hb_tag_t tag,
 					unsigned int value)
 {
+  if (tag == HB_TAG ('a','a','l','t'))
+  {
+    feature_info_t *info = features.push();
+    info->type = 17/*kCharacterAlternativesType*/;
+    info->setting = value;
+    return;
+  }
+
   const hb_aat_feature_mapping_t *mapping = hb_aat_layout_find_feature_mapping (tag);
   if (!mapping) return;