Roll HarfBuzz to 1.1.3

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 30 matching lines @@
 #define HB_OT_TAG_GDEF HB_TAG('G','D','E','F')
 #define HB_OT_TAG_GSUB HB_TAG('G','S','U','B')
 #define HB_OT_TAG_GPOS HB_TAG('G','P','O','S')
 #define HB_OT_TAG_JSTF HB_TAG('J','S','T','F')
 
 
 /*
  * GDEF
  */
 
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_has_glyph_classes (hb_face_t *face);
 
 typedef enum {
   HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED = 0,
   HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH   = 1,
   HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE     = 2,
   HB_OT_LAYOUT_GLYPH_CLASS_MARK         = 3,
   HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT    = 4
 } hb_ot_layout_glyph_class_t;
 
-hb_ot_layout_glyph_class_t
+HB_EXTERN hb_ot_layout_glyph_class_t
 hb_ot_layout_get_glyph_class (hb_face_t      *face,
                               hb_codepoint_t  glyph);
 
-void
+HB_EXTERN void
 hb_ot_layout_get_glyphs_in_class (hb_face_t                  *face,
                                   hb_ot_layout_glyph_class_t  klass,
                                   hb_set_t                   *glyphs /* OUT */);
 
 
 /* Not that useful.  Provides list of attach points for a glyph that a
  * client may want to cache */
-unsigned int
+HB_EXTERN unsigned int
 hb_ot_layout_get_attach_points (hb_face_t      *face,
                                 hb_codepoint_t  glyph,
                                 unsigned int    start_offset,
                                 unsigned int   *point_count /* IN/OUT */,
                                 unsigned int   *point_array /* OUT */);
 
 /* Ligature caret positions */
-unsigned int
+HB_EXTERN unsigned int
 hb_ot_layout_get_ligature_carets (hb_font_t      *font,
                                   hb_direction_t  direction,
                                   hb_codepoint_t  glyph,
                                   unsigned int    start_offset,
                                   unsigned int   *caret_count /* IN/OUT */,
                                   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
 
-unsigned int
+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_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_table_find_script (hb_face_t    *face,
                                 hb_tag_t      table_tag,
                                 hb_tag_t      script_tag,
                                 unsigned int *script_index);
 
 /* Like find_script, but takes zero-terminated array of scripts to test */
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_table_choose_script (hb_face_t      *face,
                                   hb_tag_t        table_tag,
                                   const hb_tag_t *script_tags,
                                   unsigned int   *script_index,
                                   hb_tag_t       *chosen_script);
 
-unsigned int
+HB_EXTERN unsigned int
 hb_ot_layout_table_get_feature_tags (hb_face_t    *face,
                                      hb_tag_t      table_tag,
                                      unsigned int  start_offset,
                                      unsigned int *feature_count /* IN/OUT */,
                                      hb_tag_t     *feature_tags /* OUT */);
 
-unsigned int
+HB_EXTERN unsigned int
 hb_ot_layout_script_get_language_tags (hb_face_t    *face,
                                        hb_tag_t      table_tag,
                                        unsigned int  script_index,
                                        unsigned int  start_offset,
                                        unsigned int *language_count /* IN/OUT */,
                                        hb_tag_t     *language_tags /* OUT */);
 
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_script_find_language (hb_face_t    *face,
                                    hb_tag_t      table_tag,
                                    unsigned int  script_index,
                                    hb_tag_t      language_tag,
                                    unsigned int *language_index);
 
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_language_get_required_feature_index (hb_face_t    *face,
                                                   hb_tag_t      table_tag,
                                                   unsigned int  script_index,
                                                   unsigned int  language_index,
                                                   unsigned int *feature_index);
 
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_language_get_required_feature (hb_face_t    *face,
                                             hb_tag_t      table_tag,
                                             unsigned int  script_index,
                                             unsigned int  language_index,
                                             unsigned int *feature_index,
                                             hb_tag_t     *feature_tag);
 
-unsigned int
+HB_EXTERN unsigned int
 hb_ot_layout_language_get_feature_indexes (hb_face_t    *face,
                                            hb_tag_t      table_tag,
                                            unsigned int  script_index,
                                            unsigned int  language_index,
                                            unsigned int  start_offset,
                                            unsigned int *feature_count /* IN/OUT */,
                                            unsigned int *feature_indexes /* OUT */);
 
-unsigned int
+HB_EXTERN unsigned int
 hb_ot_layout_language_get_feature_tags (hb_face_t    *face,
                                         hb_tag_t      table_tag,
                                         unsigned int  script_index,
                                         unsigned int  language_index,
                                         unsigned int  start_offset,
                                         unsigned int *feature_count /* IN/OUT */,
                                         hb_tag_t     *feature_tags /* OUT */);
 
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_language_find_feature (hb_face_t    *face,
                                     hb_tag_t      table_tag,
                                     unsigned int  script_index,
                                     unsigned int  language_index,
                                     hb_tag_t      feature_tag,
                                     unsigned int *feature_index);
 
-unsigned int
+HB_EXTERN unsigned int
 hb_ot_layout_feature_get_lookups (hb_face_t    *face,
                                   hb_tag_t      table_tag,
                                   unsigned int  feature_index,
                                   unsigned int  start_offset,
                                   unsigned int *lookup_count /* IN/OUT */,
                                   unsigned int *lookup_indexes /* OUT */);
 
-unsigned int
+HB_EXTERN unsigned int
 hb_ot_layout_table_get_lookup_count (hb_face_t    *face,
                                      hb_tag_t      table_tag);
 
 
-void
+HB_EXTERN void
 hb_ot_layout_collect_lookups (hb_face_t      *face,
                               hb_tag_t        table_tag,
                               const hb_tag_t *scripts,
                               const hb_tag_t *languages,
                               const hb_tag_t *features,
                               hb_set_t       *lookup_indexes /* OUT */);
 
-void
+HB_EXTERN void
 hb_ot_layout_lookup_collect_glyphs (hb_face_t    *face,
                                     hb_tag_t      table_tag,
                                     unsigned int  lookup_index,
                                     hb_set_t     *glyphs_before, /* OUT. May be NULL */
                                     hb_set_t     *glyphs_input,  /* OUT. May be NULL */
                                     hb_set_t     *glyphs_after,  /* OUT. May be NULL */
                                     hb_set_t     *glyphs_output  /* OUT. May be NULL */);
 
 #ifdef HB_NOT_IMPLEMENTED
 typedef struct
 {
   const hb_codepoint_t *before,
   unsigned int          before_length,
   const hb_codepoint_t *input,
   unsigned int          input_length,
   const hb_codepoint_t *after,
   unsigned int          after_length,
 } hb_ot_layout_glyph_sequence_t;
 
 typedef hb_bool_t
 (*hb_ot_layout_glyph_sequence_func_t) (hb_font_t    *font,
                                        hb_tag_t      table_tag,
                                        unsigned int  lookup_index,
                                        const hb_ot_layout_glyph_sequence_t *sequence,
                                        void         *user_data);
 
-void
+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
 
 
 /*
  * GSUB
  */
 
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_has_substitution (hb_face_t *face);
 
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_lookup_would_substitute (hb_face_t            *face,
                                       unsigned int          lookup_index,
                                       const hb_codepoint_t *glyphs,
                                       unsigned int          glyphs_length,
                                       hb_bool_t             zero_context);
 
-void
+HB_EXTERN void
 hb_ot_layout_lookup_substitute_closure (hb_face_t    *face,
                                         unsigned int  lookup_index,
                                         hb_set_t     *glyphs
                                         /*TODO , hb_bool_t  inclusive */);
 
 #ifdef HB_NOT_IMPLEMENTED
 /* Note: You better have GDEF when using this API, or marks won't do much. */
-hb_bool_t
+HB_EXTERN hb_bool_t
 Xhb_ot_layout_lookup_substitute (hb_font_t            *font,
                                 unsigned int          lookup_index,
                                 const hb_ot_layout_glyph_sequence_t *sequence,
                                 unsigned int          out_size,
                                 hb_codepoint_t       *glyphs_out,   /* OUT */
                                 unsigned int         *clusters_out, /* OUT */
                                 unsigned int         *out_length    /* OUT */);
 #endif
 
 
 /*
  * GPOS
  */
 
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_has_positioning (hb_face_t *face);
 
 #ifdef HB_NOT_IMPLEMENTED
 /* Note: You better have GDEF when using this API, or marks won't do much. */
-hb_bool_t
+HB_EXTERN hb_bool_t
 Xhb_ot_layout_lookup_position (hb_font_t            *font,
                               unsigned int          lookup_index,
                               const hb_ot_layout_glyph_sequence_t *sequence,
                               hb_glyph_position_t  *positions /* IN / OUT */);
 #endif
 
 /* Optical 'size' feature info.  Returns true if found.
  * http://www.microsoft.com/typography/otspec/features_pt.htm#size */
-hb_bool_t
+HB_EXTERN hb_bool_t
 hb_ot_layout_get_size_params (hb_face_t    *face,
                               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 */