Roll HarfBuzz to 1.4.1

third_party/harfbuzz-ng/src/hb-ot-layout.h

 /*
  * Copyright © 2007,2008,2009  Red Hat, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
  * all copies of this software.
@@ skipping 77 matching lines @@
                                   hb_position_t  *caret_array /* OUT */);
 
 
 /*
  * GSUB/GPOS feature query and enumeration interface
  */
 
 #define HB_OT_LAYOUT_NO_SCRIPT_INDEX            0xFFFFu
 #define HB_OT_LAYOUT_NO_FEATURE_INDEX           0xFFFFu
 #define HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX     0xFFFFu
+#define HB_OT_LAYOUT_NO_VARIATIONS_INDEX        0xFFFFFFFFu
 
 HB_EXTERN unsigned int
 hb_ot_layout_table_get_script_tags (hb_face_t    *face,
                                     hb_tag_t      table_tag,
                                     unsigned int  start_offset,
                                     unsigned int *script_count /* IN/OUT */,
                                     hb_tag_t     *script_tags /* OUT */);
 
 HB_EXTERN hb_bool_t
 hb_ot_layout_table_find_script (hb_face_t    *face,
@@ skipping 121 matching lines @@
                                        void         *user_data);
 
 HB_EXTERN void
 Xhb_ot_layout_lookup_enumerate_sequences (hb_face_t    *face,
                                          hb_tag_t      table_tag,
                                          unsigned int  lookup_index,
                                          hb_ot_layout_glyph_sequence_func_t callback,
                                          void         *user_data);
 #endif
 
+/* Variations support */
+
+HB_EXTERN hb_bool_t
+hb_ot_layout_table_find_feature_variations (hb_face_t    *face,
+                                            hb_tag_t      table_tag,
+                                            const int    *coords,
+                                            unsigned int  num_coords,
+                                            unsigned int *variations_index /* out */);
+
+HB_EXTERN unsigned int
+hb_ot_layout_feature_with_variations_get_lookups (hb_face_t    *face,
+                                                  hb_tag_t      table_tag,
+                                                  unsigned int  feature_index,
+                                                  unsigned int  variations_index,
+                                                  unsigned int  start_offset,
+                                                  unsigned int *lookup_count /* IN/OUT */,
+                                                  unsigned int *lookup_indexes /* OUT */);
+
 
 /*
  * GSUB
  */
 
 HB_EXTERN hb_bool_t
 hb_ot_layout_has_substitution (hb_face_t *face);
 
 HB_EXTERN hb_bool_t
 hb_ot_layout_lookup_would_substitute (hb_face_t            *face,
@@ skipping 44 matching lines @@
                               unsigned int *design_size,       /* OUT.  May be NULL */
                               unsigned int *subfamily_id,      /* OUT.  May be NULL */
                               unsigned int *subfamily_name_id, /* OUT.  May be NULL */
                               unsigned int *range_start,       /* OUT.  May be NULL */
                               unsigned int *range_end          /* OUT.  May be NULL */);
 
 
 HB_END_DECLS
 
 #endif /* HB_OT_LAYOUT_H */