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