[Tizen] [GPOS] Avoid O(n^2) behavior in mark-attachment

[platform/upstream/harfbuzz.git] / src / hb-ot-layout-gsubgpos.hh

diff --git a/src/hb-ot-layout-gsubgpos.hh b/src/hb-ot-layout-gsubgpos.hh
index 65de131..d9a068c 100644 (file)
--- a/src/hb-ot-layout-gsubgpos.hh
+++ b/src/hb-ot-layout-gsubgpos.hh
@@ -641,6 +641,9 @@ struct hb_ot_apply_context_t :
   uint32_t random_state;
 
 
+  signed last_base = -1; // GPOS uses
+  unsigned last_base_until = 0; // GPOS uses
+
   hb_ot_apply_context_t (unsigned int table_index_,
                         hb_font_t *font_,
                         hb_buffer_t *buffer_) :
@@ -673,7 +676,7 @@ struct hb_ot_apply_context_t :
     iter_context.init (this, true);
   }
 
-  void set_lookup_mask (hb_mask_t mask) { lookup_mask = mask; init_iters (); }
+  void set_lookup_mask (hb_mask_t mask) { lookup_mask = mask; last_base = -1; last_base_until = 0; init_iters (); }
   void set_auto_zwj (bool auto_zwj_) { auto_zwj = auto_zwj_; init_iters (); }
   void set_auto_zwnj (bool auto_zwnj_) { auto_zwnj = auto_zwnj_; init_iters (); }
   void set_random (bool random_) { random = random_; }