From 1bf8fa2f1f67a4f72d14c53bc4242e38e46ab475 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Fri, 8 Jul 2022 14:22:21 -0600
Subject: [PATCH] [>64k:layout:(Chain)Context] Implement format 4

Implements rest of https://github.com/be-fonts/boring-expansion-spec/issues/34

Subset does NOT lower format.
---
 src/hb-ot-layout-gsubgpos.hh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/hb-ot-layout-gsubgpos.hh b/src/hb-ot-layout-gsubgpos.hh
index 24a688e24..cbbd80efa 100644
--- a/src/hb-ot-layout-gsubgpos.hh
+++ b/src/hb-ot-layout-gsubgpos.hh
@@ -2609,6 +2609,7 @@ struct Context
     case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
     case 3: return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...));
 #ifndef HB_NO_BORING_EXPANSION
+    case 4: return_trace (c->dispatch (u.format4, std::forward<Ts> (ds)...));
     case 5: return_trace (c->dispatch (u.format5, std::forward<Ts> (ds)...));
 #endif
     default:return_trace (c->default_return_value ());
@@ -2622,6 +2623,7 @@ struct Context
   ContextFormat2_5<SmallTypes>	format2;
   ContextFormat3		format3;
 #ifndef HB_NO_BORING_EXPANSION
+  ContextFormat1_4<MediumTypes>	format4;
   ContextFormat2_5<MediumTypes>	format5;
 #endif
   } u;
@@ -3781,6 +3783,7 @@ struct ChainContext
     case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
     case 3: return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...));
 #ifndef HB_NO_BORING_EXPANSION
+    case 4: return_trace (c->dispatch (u.format4, std::forward<Ts> (ds)...));
     case 5: return_trace (c->dispatch (u.format5, std::forward<Ts> (ds)...));
 #endif
     default:return_trace (c->default_return_value ());
@@ -3794,6 +3797,7 @@ struct ChainContext
   ChainContextFormat2_5<SmallTypes>	format2;
   ChainContextFormat3			format3;
 #ifndef HB_NO_BORING_EXPANSION
+  ChainContextFormat1_4<MediumTypes>	format4;
   ChainContextFormat2_5<MediumTypes>	format5;
 #endif
   } u;