134 lines
4.5 KiB
C++
134 lines
4.5 KiB
C++
/*
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* Copyright © 2012 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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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_SHAPER_HH
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#define HB_SHAPER_HH
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#include "hb.hh"
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#include "hb-machinery.hh"
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typedef hb_bool_t hb_shape_func_t (hb_shape_plan_t *shape_plan,
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hb_font_t *font,
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hb_buffer_t *buffer,
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const hb_feature_t *features,
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unsigned int num_features);
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#define HB_SHAPER_IMPLEMENT(name) \
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extern "C" HB_INTERNAL hb_shape_func_t _hb_##name##_shape;
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#include "hb-shaper-list.hh"
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#undef HB_SHAPER_IMPLEMENT
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struct hb_shaper_entry_t {
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char name[16];
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hb_shape_func_t *func;
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};
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HB_INTERNAL const hb_shaper_entry_t *
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_hb_shapers_get ();
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template <typename Data, unsigned int WheresData, typename T>
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struct hb_shaper_lazy_loader_t;
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#define HB_SHAPER_ORDER(Shaper) \
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HB_PASTE (HB_SHAPER_ORDER_, Shaper)
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enum hb_shaper_order_t
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{
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_HB_SHAPER_ORDER_ORDER_ZERO,
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#define HB_SHAPER_IMPLEMENT(Shaper) \
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HB_SHAPER_ORDER (Shaper),
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#include "hb-shaper-list.hh"
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#undef HB_SHAPER_IMPLEMENT
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_HB_SHAPERS_COUNT_PLUS_ONE,
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HB_SHAPERS_COUNT = _HB_SHAPERS_COUNT_PLUS_ONE - 1,
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};
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template <enum hb_shaper_order_t order, typename Object> struct hb_shaper_object_data_type_t;
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#define HB_SHAPER_DATA_SUCCEEDED ((void *) +1)
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#define HB_SHAPER_DATA_TYPE(shaper, object) hb_##shaper##_##object##_data_t
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#define HB_SHAPER_DATA_CREATE_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_create
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#define HB_SHAPER_DATA_DESTROY_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_destroy
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#define HB_SHAPER_DATA_INSTANTIATE_SHAPERS(shaper, object) \
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\
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struct HB_SHAPER_DATA_TYPE (shaper, object); /* Type forward declaration. */ \
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extern "C" HB_INTERNAL HB_SHAPER_DATA_TYPE (shaper, object) * \
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HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (hb_##object##_t *object); \
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extern "C" HB_INTERNAL void \
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HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA_TYPE (shaper, object) *shaper##_##object); \
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\
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template <> \
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struct hb_shaper_object_data_type_t<HB_SHAPER_ORDER (shaper), hb_##object##_t> \
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{ \
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typedef HB_SHAPER_DATA_TYPE(shaper, object) value; \
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}; \
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\
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template <unsigned int WheresData> \
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struct hb_shaper_lazy_loader_t<hb_##object##_t, WheresData, HB_SHAPER_DATA_TYPE(shaper, object)> \
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: hb_lazy_loader_t<HB_SHAPER_DATA_TYPE(shaper, object), \
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hb_shaper_lazy_loader_t<hb_##object##_t, \
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WheresData, \
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HB_SHAPER_DATA_TYPE(shaper, object)>, \
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hb_##object##_t, WheresData> \
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{ \
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typedef HB_SHAPER_DATA_TYPE(shaper, object) Type; \
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static Type* create (hb_##object##_t *data) \
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{ return HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (data); } \
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static Type *get_null () { return nullptr; } \
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static void destroy (Type *p) { HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (p); } \
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}; \
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\
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static_assert (true, "") /* Require semicolon after. */
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template <typename Object>
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struct hb_shaper_object_dataset_t
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{
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void init0 (Object *parent_data)
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{
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this->parent_data = parent_data;
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#define HB_SHAPER_IMPLEMENT(shaper) shaper.init0 ();
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#include "hb-shaper-list.hh"
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#undef HB_SHAPER_IMPLEMENT
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}
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void fini ()
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{
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#define HB_SHAPER_IMPLEMENT(shaper) shaper.fini ();
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#include "hb-shaper-list.hh"
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#undef HB_SHAPER_IMPLEMENT
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}
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Object *parent_data; /* MUST be JUST before the lazy loaders. */
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#define HB_SHAPER_IMPLEMENT(shaper) \
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hb_shaper_lazy_loader_t<Object, HB_SHAPER_ORDER(shaper), \
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typename hb_shaper_object_data_type_t<HB_SHAPER_ORDER(shaper), Object>::value \
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> shaper;
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#include "hb-shaper-list.hh"
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#undef HB_SHAPER_IMPLEMENT
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};
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#endif /* HB_SHAPER_HH */
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