1 /*
   2  * Copyright © 2009  Red Hat, Inc.
   3  *
   4  *  This is part of HarfBuzz, a text shaping library.
   5  *
   6  * Permission is hereby granted, without written agreement and without
   7  * license or royalty fees, to use, copy, modify, and distribute this
   8  * software and its documentation for any purpose, provided that the
   9  * above copyright notice and the following two paragraphs appear in
  10  * all copies of this software.
  11  *
  12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  16  * DAMAGE.
  17  *
  18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  23  *
  24  * Red Hat Author(s): Behdad Esfahbod
  25  */
  26 
  27 #ifndef HB_H_IN
  28 #error "Include <hb.h> instead."
  29 #endif
  30 
  31 #ifndef HB_FACE_H
  32 #define HB_FACE_H
  33 
  34 #include "hb-common.h"
  35 #include "hb-blob.h"
  36 
  37 HB_BEGIN_DECLS
  38 
  39 
  40 HB_EXTERN unsigned int
  41 hb_face_count (hb_blob_t *blob);
  42 
  43 
  44 /*
  45  * hb_face_t
  46  */
  47 
  48 typedef struct hb_face_t hb_face_t;
  49 
  50 HB_EXTERN hb_face_t *
  51 hb_face_create (hb_blob_t    *blob,
  52                 unsigned int  index);
  53 
  54 typedef hb_blob_t * (*hb_reference_table_func_t)  (hb_face_t *face, hb_tag_t tag, void *user_data);
  55 
  56 /* calls destroy() when not needing user_data anymore */
  57 HB_EXTERN hb_face_t *
  58 hb_face_create_for_tables (hb_reference_table_func_t  reference_table_func,
  59                            void                      *user_data,
  60                            hb_destroy_func_t          destroy);
  61 
  62 HB_EXTERN hb_face_t *
  63 hb_face_get_empty (void);
  64 
  65 HB_EXTERN hb_face_t *
  66 hb_face_reference (hb_face_t *face);
  67 
  68 HB_EXTERN void
  69 hb_face_destroy (hb_face_t *face);
  70 
  71 HB_EXTERN hb_bool_t
  72 hb_face_set_user_data (hb_face_t          *face,
  73                        hb_user_data_key_t *key,
  74                        void *              data,
  75                        hb_destroy_func_t   destroy,
  76                        hb_bool_t           replace);
  77 
  78 HB_EXTERN void *
  79 hb_face_get_user_data (hb_face_t          *face,
  80                        hb_user_data_key_t *key);
  81 
  82 HB_EXTERN void
  83 hb_face_make_immutable (hb_face_t *face);
  84 
  85 HB_EXTERN hb_bool_t
  86 hb_face_is_immutable (hb_face_t *face);
  87 
  88 
  89 HB_EXTERN hb_blob_t *
  90 hb_face_reference_table (hb_face_t *face,
  91                          hb_tag_t   tag);
  92 
  93 HB_EXTERN hb_blob_t *
  94 hb_face_reference_blob (hb_face_t *face);
  95 
  96 HB_EXTERN void
  97 hb_face_set_index (hb_face_t    *face,
  98                    unsigned int  index);
  99 
 100 HB_EXTERN unsigned int
 101 hb_face_get_index (hb_face_t    *face);
 102 
 103 HB_EXTERN void
 104 hb_face_set_upem (hb_face_t    *face,
 105                   unsigned int  upem);
 106 
 107 HB_EXTERN unsigned int
 108 hb_face_get_upem (hb_face_t *face);
 109 
 110 HB_EXTERN void
 111 hb_face_set_glyph_count (hb_face_t    *face,
 112                          unsigned int  glyph_count);
 113 
 114 HB_EXTERN unsigned int
 115 hb_face_get_glyph_count (hb_face_t *face);
 116 
 117 HB_EXTERN unsigned int
 118 hb_face_get_table_tags (hb_face_t    *face,
 119                         unsigned int  start_offset,
 120                         unsigned int *table_count, /* IN/OUT */
 121                         hb_tag_t     *table_tags /* OUT */);
 122 
 123 HB_END_DECLS
 124 
 125 #endif /* HB_FACE_H */