1 /* 2 * Copyright © 2009 Red Hat, Inc. 3 * Copyright © 2011 Google, Inc. 4 * 5 * This is part of HarfBuzz, a text shaping library. 6 * 7 * Permission is hereby granted, without written agreement and without 8 * license or royalty fees, to use, copy, modify, and distribute this 9 * software and its documentation for any purpose, provided that the 10 * above copyright notice and the following two paragraphs appear in 11 * all copies of this software. 12 * 13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 17 * DAMAGE. 18 * 19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 24 * 25 * Red Hat Author(s): Behdad Esfahbod 26 * Google Author(s): Behdad Esfahbod 27 */ 28 29 #ifndef HB_FACE_PRIVATE_HH 30 #define HB_FACE_PRIVATE_HH 31 32 #include "hb-private.hh" 33 34 #include "hb-object-private.hh" 35 #include "hb-shaper-private.hh" 36 #include "hb-shape-plan-private.hh" 37 38 39 /* 40 * hb_face_t 41 */ 42 43 struct hb_face_t { 44 hb_object_header_t header; 45 ASSERT_POD (); 46 47 hb_bool_t immutable; 48 49 hb_reference_table_func_t reference_table_func; 50 void *user_data; 51 hb_destroy_func_t destroy; 52 53 unsigned int index; /* Face index in a collection, zero-based. */ 54 mutable unsigned int upem; /* Units-per-EM. */ 55 mutable unsigned int num_glyphs; /* Number of glyphs. */ 56 57 struct hb_shaper_data_t shaper_data; /* Various shaper data. */ 58 59 /* Various non-shaping data. */ 60 /* ... */ 61 62 /* Cache */ 63 struct plan_node_t { 64 hb_shape_plan_t *shape_plan; 65 plan_node_t *next; 66 } *shape_plans; 67 68 reference_tablehb_face_t69 inline hb_blob_t *reference_table (hb_tag_t tag) const 70 { 71 hb_blob_t *blob; 72 73 if (unlikely (!reference_table_func)) 74 return hb_blob_get_empty (); 75 76 blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data); 77 if (unlikely (!blob)) 78 return hb_blob_get_empty (); 79 80 return blob; 81 } 82 get_upemhb_face_t83 inline HB_PURE_FUNC unsigned int get_upem (void) const 84 { 85 if (unlikely (!upem)) 86 load_upem (); 87 return upem; 88 } 89 get_num_glyphshb_face_t90 inline unsigned int get_num_glyphs (void) const 91 { 92 if (unlikely (num_glyphs == (unsigned int) -1)) 93 load_num_glyphs (); 94 return num_glyphs; 95 } 96 97 private: 98 HB_INTERNAL void load_upem (void) const; 99 HB_INTERNAL void load_num_glyphs (void) const; 100 }; 101 102 extern HB_INTERNAL const hb_face_t _hb_face_nil; 103 104 #define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS 105 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, face); 106 #include "hb-shaper-list.hh" 107 #undef HB_SHAPER_IMPLEMENT 108 #undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS 109 110 111 #endif /* HB_FACE_PRIVATE_HH */ 112