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 #include "hb-set.h"
  37 
  38 HB_BEGIN_DECLS
  39 
  40 
  41 HB_EXTERN unsigned int
  42 hb_face_count (hb_blob_t *blob);
  43 
  44 
  45 /*
  46  * hb_face_t
  47  */
  48 
  49 typedef struct hb_face_t hb_face_t;
  50 
  51 HB_EXTERN hb_face_t *
  52 hb_face_create (hb_blob_t    *blob,
  53                 unsigned int  index);
  54 
  55 typedef hb_blob_t * (*hb_reference_table_func_t)  (hb_face_t *face, hb_tag_t tag, void *user_data);
  56 
  57 /* calls destroy() when not needing user_data anymore */
  58 HB_EXTERN hb_face_t *
  59 hb_face_create_for_tables (hb_reference_table_func_t  reference_table_func,
  60                            void                      *user_data,
  61                            hb_destroy_func_t          destroy);
  62 
  63 HB_EXTERN hb_face_t *
  64 hb_face_get_empty (void);
  65 
  66 HB_EXTERN hb_face_t *
  67 hb_face_reference (hb_face_t *face);
  68 
  69 HB_EXTERN void
  70 hb_face_destroy (hb_face_t *face);
  71 
  72 HB_EXTERN hb_bool_t
  73 hb_face_set_user_data (hb_face_t          *face,
  74                        hb_user_data_key_t *key,
  75                        void *              data,
  76                        hb_destroy_func_t   destroy,
  77                        hb_bool_t           replace);
  78 
  79 HB_EXTERN void *
  80 hb_face_get_user_data (const hb_face_t    *face,
  81                        hb_user_data_key_t *key);
  82 
  83 HB_EXTERN void
  84 hb_face_make_immutable (hb_face_t *face);
  85 
  86 HB_EXTERN hb_bool_t
  87 hb_face_is_immutable (const hb_face_t *face);
  88 
  89 
  90 HB_EXTERN hb_blob_t *
  91 hb_face_reference_table (const hb_face_t *face,
  92                          hb_tag_t tag);
  93 
  94 HB_EXTERN hb_blob_t *
  95 hb_face_reference_blob (hb_face_t *face);
  96 
  97 HB_EXTERN void
  98 hb_face_set_index (hb_face_t    *face,
  99                    unsigned int  index);
 100 
 101 HB_EXTERN unsigned int
 102 hb_face_get_index (const hb_face_t *face);
 103 
 104 HB_EXTERN void
 105 hb_face_set_upem (hb_face_t    *face,
 106                   unsigned int  upem);
 107 
 108 HB_EXTERN unsigned int
 109 hb_face_get_upem (const hb_face_t *face);
 110 
 111 HB_EXTERN void
 112 hb_face_set_glyph_count (hb_face_t    *face,
 113                          unsigned int  glyph_count);
 114 
 115 HB_EXTERN unsigned int
 116 hb_face_get_glyph_count (const hb_face_t *face);
 117 
 118 HB_EXTERN unsigned int
 119 hb_face_get_table_tags (const hb_face_t *face,
 120                         unsigned int  start_offset,
 121                         unsigned int *table_count, /* IN/OUT */
 122                         hb_tag_t     *table_tags /* OUT */);
 123 
 124 
 125 /*
 126  * Character set.
 127  */
 128 
 129 HB_EXTERN void
 130 hb_face_collect_unicodes (hb_face_t *face,
 131                           hb_set_t  *out);
 132 
 133 HB_EXTERN void
 134 hb_face_collect_variation_selectors (hb_face_t *face,
 135                                      hb_set_t  *out);
 136 
 137 HB_EXTERN void
 138 hb_face_collect_variation_unicodes (hb_face_t *face,
 139                                     hb_codepoint_t variation_selector,
 140                                     hb_set_t  *out);
 141 
 142 
 143 /*
 144  * Builder face.
 145  */
 146 
 147 HB_EXTERN hb_face_t *
 148 hb_face_builder_create (void);
 149 
 150 HB_EXTERN hb_bool_t
 151 hb_face_builder_add_table (hb_face_t *face,
 152                            hb_tag_t   tag,
 153                            hb_blob_t *blob);
 154 
 155 
 156 HB_END_DECLS
 157 
 158 #endif /* HB_FACE_H */