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/*
* 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. */
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 */
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