| /* |
| * Copyright © 2009 Red Hat, Inc. |
| * Copyright © 2011 Google, 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. |
| * |
| * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| * |
| * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| * |
| * Red Hat Author(s): Behdad Esfahbod |
| * Google Author(s): Behdad Esfahbod |
| */ |
| |
| #ifndef HB_FACE_HH |
| #define HB_FACE_HH |
| |
| #include "hb.hh" |
| |
| #include "hb-shaper.hh" |
| #include "hb-shape-plan.hh" |
| #include "hb-ot-face.hh" |
| |
| |
| /* |
| * hb_face_t |
| */ |
| |
| #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INSTANTIATE_SHAPERS(shaper, face); |
| #include "hb-shaper-list.hh" |
| #undef HB_SHAPER_IMPLEMENT |
| |
| struct hb_face_t |
| { |
| hb_object_header_t header; |
| |
| hb_reference_table_func_t reference_table_func; |
| void *user_data; |
| hb_destroy_func_t destroy; |
| |
| unsigned int index; /* Face index in a collection, zero-based. */ |
| mutable hb_atomic_int_t upem; /* Units-per-EM. */ |
| mutable hb_atomic_int_t num_glyphs; /* Number of glyphs. */ |
| |
| hb_shaper_object_dataset_t<hb_face_t> data;/* Various shaper data. */ |
| hb_ot_face_t table; /* All the face's tables. */ |
| |
| /* Cache */ |
| struct plan_node_t |
| { |
| hb_shape_plan_t *shape_plan; |
| plan_node_t *next; |
| }; |
| hb_atomic_ptr_t<plan_node_t> shape_plans; |
| |
| hb_blob_t *reference_table (hb_tag_t tag) const |
| { |
| hb_blob_t *blob; |
| |
| if (unlikely (!reference_table_func)) |
| return hb_blob_get_empty (); |
| |
| blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data); |
| if (unlikely (!blob)) |
| return hb_blob_get_empty (); |
| |
| return blob; |
| } |
| |
| unsigned int get_upem () const |
| { |
| unsigned int ret = upem.get_relaxed (); |
| if (unlikely (!ret)) |
| { |
| return load_upem (); |
| } |
| return ret; |
| } |
| |
| unsigned int get_num_glyphs () const |
| { |
| unsigned int ret = num_glyphs.get_relaxed (); |
| if (unlikely (ret == UINT_MAX)) |
| return load_num_glyphs (); |
| return ret; |
| } |
| |
| private: |
| HB_INTERNAL unsigned int load_upem () const; |
| HB_INTERNAL unsigned int load_num_glyphs () const; |
| }; |
| DECLARE_NULL_INSTANCE (hb_face_t); |
| |
| |
| #endif /* HB_FACE_HH */ |