110 lines
2.9 KiB
C++
110 lines
2.9 KiB
C++
/*
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* Copyright © 2009 Red Hat, Inc.
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* Copyright © 2011 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_FACE_HH
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#define HB_FACE_HH
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#include "hb.hh"
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#include "hb-shaper.hh"
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#include "hb-shape-plan.hh"
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#include "hb-ot-face.hh"
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/*
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* hb_face_t
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*/
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#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INSTANTIATE_SHAPERS(shaper, face);
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#include "hb-shaper-list.hh"
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#undef HB_SHAPER_IMPLEMENT
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struct hb_face_t
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{
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hb_object_header_t header;
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hb_reference_table_func_t reference_table_func;
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void *user_data;
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hb_destroy_func_t destroy;
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unsigned int index; /* Face index in a collection, zero-based. */
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mutable hb_atomic_int_t upem; /* Units-per-EM. */
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mutable hb_atomic_int_t num_glyphs; /* Number of glyphs. */
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hb_shaper_object_dataset_t<hb_face_t> data;/* Various shaper data. */
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hb_ot_face_t table; /* All the face's tables. */
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/* Cache */
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struct plan_node_t
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{
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hb_shape_plan_t *shape_plan;
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plan_node_t *next;
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};
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hb_atomic_ptr_t<plan_node_t> shape_plans;
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hb_blob_t *reference_table (hb_tag_t tag) const
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{
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hb_blob_t *blob;
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if (unlikely (!reference_table_func))
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return hb_blob_get_empty ();
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blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data);
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if (unlikely (!blob))
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return hb_blob_get_empty ();
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return blob;
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}
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HB_PURE_FUNC unsigned int get_upem () const
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{
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unsigned int ret = upem.get_relaxed ();
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if (unlikely (!ret))
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{
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return load_upem ();
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}
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return ret;
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}
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unsigned int get_num_glyphs () const
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{
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unsigned int ret = num_glyphs.get_relaxed ();
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if (unlikely (ret == (unsigned int) -1))
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return load_num_glyphs ();
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return ret;
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}
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private:
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HB_INTERNAL unsigned int load_upem () const;
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HB_INTERNAL unsigned int load_num_glyphs () const;
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};
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DECLARE_NULL_INSTANCE (hb_face_t);
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#endif /* HB_FACE_HH */
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