HarfBuzz text shaping engine
http://harfbuzz.github.io/
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108 lines
2.9 KiB
108 lines
2.9 KiB
/* |
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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_PRIVATE_HH |
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#define HB_FACE_PRIVATE_HH |
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#include "hb-private.hh" |
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#include "hb-shaper-private.hh" |
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#include "hb-shape-plan-private.hh" |
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/* |
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* hb_face_t |
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*/ |
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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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ASSERT_POD (); |
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hb_bool_t immutable; |
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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 unsigned int upem; /* Units-per-EM. */ |
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mutable unsigned int num_glyphs; /* Number of glyphs. */ |
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struct hb_shaper_data_t shaper_data; /* Various shaper data. */ |
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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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inline 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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inline HB_PURE_FUNC unsigned int get_upem (void) const |
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{ |
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if (unlikely (!upem)) |
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load_upem (); |
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return upem; |
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} |
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inline unsigned int get_num_glyphs (void) const |
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{ |
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if (unlikely (num_glyphs == (unsigned int) -1)) |
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load_num_glyphs (); |
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return num_glyphs; |
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} |
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private: |
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HB_INTERNAL void load_upem (void) const; |
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HB_INTERNAL void load_num_glyphs (void) const; |
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}; |
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DECLARE_NULL_INSTANCE (hb_face_t); |
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#define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS |
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#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, face); |
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#include "hb-shaper-list.hh" |
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#undef HB_SHAPER_IMPLEMENT |
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#undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS |
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#endif /* HB_FACE_PRIVATE_HH */
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