/*
* 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
*/
#include "hb-shape-plan-private.hh"
#include "hb-shaper-private.hh"
#include "hb-font-private.hh"
#include "hb-buffer-private.hh"
#define HB_SHAPER_IMPLEMENT(shaper) \
HB_SHAPER_DATA_ENSURE_DECLARE(shaper, face) \
HB_SHAPER_DATA_ENSURE_DECLARE(shaper, font)
#include "hb-shaper-list.hh"
#undef HB_SHAPER_IMPLEMENT
static void
hb_shape_plan_plan (hb_shape_plan_t *shape_plan,
const hb_feature_t *user_features,
unsigned int num_user_features,
const char * const *shaper_list)
{
const hb_shaper_pair_t *shapers = _hb_shapers_get ();
#define HB_SHAPER_PLAN(shaper) \
HB_STMT_START { \
if (hb_##shaper##_shaper_face_data_ensure (shape_plan->face)) { \
HB_SHAPER_DATA (shaper, shape_plan) = \
HB_SHAPER_DATA_CREATE_FUNC (shaper, shape_plan) (shape_plan, user_features, num_user_features); \
shape_plan->shaper_func = _hb_##shaper##_shape; \
shape_plan->shaper_name = #shaper; \
return; \
} \
} HB_STMT_END
if (likely (!shaper_list)) {
for (unsigned int i = 0; i < HB_SHAPERS_COUNT; i++)
if (0)
;
#define HB_SHAPER_IMPLEMENT(shaper) \
else if (shapers[i].func == _hb_##shaper##_shape) \
HB_SHAPER_PLAN (shaper);
#include "hb-shaper-list.hh"
#undef HB_SHAPER_IMPLEMENT
} else {
for (; *shaper_list; shaper_list++)
if (0)
;
#define HB_SHAPER_IMPLEMENT(shaper) \
else if (0 == strcmp (*shaper_list, #shaper)) \
HB_SHAPER_PLAN (shaper);
#include "hb-shaper-list.hh"
#undef HB_SHAPER_IMPLEMENT
}
#undef HB_SHAPER_PLAN
}
/*
* hb_shape_plan_t
*/
/**
* hb_shape_plan_create: (Xconstructor)
* @face:
* @props:
* @user_features: (array length=num_user_features):
* @num_user_features:
* @shaper_list: (array zero-terminated=1):
*
*
*
* Return value: (transfer full):
*
* Since: 1.0
**/
hb_shape_plan_t *
hb_shape_plan_create (hb_face_t *face,
const hb_segment_properties_t *props,
const hb_feature_t *user_features,
unsigned int num_user_features,
const char * const *shaper_list)
{
assert (props->direction != HB_DIRECTION_INVALID);
hb_shape_plan_t *shape_plan;
if (unlikely (!face))
face = hb_face_get_empty ();
if (unlikely (!props || hb_object_is_inert (face)))
return hb_shape_plan_get_empty ();
if (!(shape_plan = hb_object_create<hb_shape_plan_t> ()))
return hb_shape_plan_get_empty ();
hb_face_make_immutable (face);
shape_plan->default_shaper_list = shaper_list == NULL;
shape_plan->face = hb_face_reference (face);
shape_plan->props = *props;
hb_shape_plan_plan (shape_plan, user_features, num_user_features, shaper_list);
return shape_plan;
}
/**
* hb_shape_plan_get_empty:
*
*
*
* Return value: (transfer full):
*
* Since: 1.0
**/
hb_shape_plan_t *
hb_shape_plan_get_empty (void)
{
static const hb_shape_plan_t _hb_shape_plan_nil = {
HB_OBJECT_HEADER_STATIC,
true, /* default_shaper_list */
NULL, /* face */
HB_SEGMENT_PROPERTIES_DEFAULT, /* props */
NULL, /* shaper_func */
NULL, /* shaper_name */
{
#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
#include "hb-shaper-list.hh"
#undef HB_SHAPER_IMPLEMENT
}
};
return const_cast<hb_shape_plan_t *> (&_hb_shape_plan_nil);
}
/**
* hb_shape_plan_reference: (skip)
* @shape_plan: a shape plan.
*
*
*
* Return value: (transfer full):
*
* Since: 1.0
**/
hb_shape_plan_t *
hb_shape_plan_reference (hb_shape_plan_t *shape_plan)
{
return hb_object_reference (shape_plan);
}
/**
* hb_shape_plan_destroy: (skip)
* @shape_plan: a shape plan.
*
*
*
* Since: 1.0
**/
void
hb_shape_plan_destroy (hb_shape_plan_t *shape_plan)
{
if (!hb_object_destroy (shape_plan)) return;
#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, shape_plan);
#include "hb-shaper-list.hh"
#undef HB_SHAPER_IMPLEMENT
hb_face_destroy (shape_plan->face);
free (shape_plan);
}
/**
* hb_shape_plan_set_user_data: (skip)
* @shape_plan: a shape plan.
* @key:
* @data:
* @destroy:
* @replace:
*
*
*
* Return value:
*
* Since: 1.0
**/
hb_bool_t
hb_shape_plan_set_user_data (hb_shape_plan_t *shape_plan,
hb_user_data_key_t *key,
void * data,
hb_destroy_func_t destroy,
hb_bool_t replace)
{
return hb_object_set_user_data (shape_plan, key, data, destroy, replace);
}
/**
* hb_shape_plan_get_user_data: (skip)
* @shape_plan: a shape plan.
* @key:
*
*
*
* Return value: (transfer none):
*
* Since: 1.0
**/
void *
hb_shape_plan_get_user_data (hb_shape_plan_t *shape_plan,
hb_user_data_key_t *key)
{
return hb_object_get_user_data (shape_plan, key);
}
/**
* hb_shape_plan_execute:
* @shape_plan: a shape plan.
* @font: a font.
* @buffer: a buffer.
* @features: (array length=num_features):
* @num_features:
*
*
*
* Return value:
*
* Since: 1.0
**/
hb_bool_t
hb_shape_plan_execute (hb_shape_plan_t *shape_plan,
hb_font_t *font,
hb_buffer_t *buffer,
const hb_feature_t *features,
unsigned int num_features)
{
if (unlikely (hb_object_is_inert (shape_plan) ||
hb_object_is_inert (font) ||
hb_object_is_inert (buffer)))
return false;
assert (shape_plan->face == font->face);
assert (hb_segment_properties_equal (&shape_plan->props, &buffer->props));
#define HB_SHAPER_EXECUTE(shaper) \
HB_STMT_START { \
return HB_SHAPER_DATA (shaper, shape_plan) && \
hb_##shaper##_shaper_font_data_ensure (font) && \
_hb_##shaper##_shape (shape_plan, font, buffer, features, num_features); \
} HB_STMT_END
if (0)
;
#define HB_SHAPER_IMPLEMENT(shaper) \
else if (shape_plan->shaper_func == _hb_##shaper##_shape) \
HB_SHAPER_EXECUTE (shaper);
#include "hb-shaper-list.hh"
#undef HB_SHAPER_IMPLEMENT
#undef HB_SHAPER_EXECUTE
return false;
}
/*
* caching
*/
#if 0
static unsigned int
hb_shape_plan_hash (const hb_shape_plan_t *shape_plan)
{
return hb_segment_properties_hash (&shape_plan->props) +
shape_plan->default_shaper_list ? 0 : (intptr_t) shape_plan->shaper_func;
}
#endif
/* TODO no user-feature caching for now. */
struct hb_shape_plan_proposal_t
{
const hb_segment_properties_t props;
const char * const *shaper_list;
hb_shape_func_t *shaper_func;
};
static hb_bool_t
hb_shape_plan_matches (const hb_shape_plan_t *shape_plan,
const hb_shape_plan_proposal_t *proposal)
{
return hb_segment_properties_equal (&shape_plan->props, &proposal->props) &&
((shape_plan->default_shaper_list && proposal->shaper_list == NULL) ||
(shape_plan->shaper_func == proposal->shaper_func));
}
/**
* hb_shape_plan_create_cached:
* @face:
* @props:
* @user_features: (array length=num_user_features):
* @num_user_features:
* @shaper_list: (array zero-terminated=1):
*
*
*
* Return value: (transfer full):
*
* Since: 1.0
**/
hb_shape_plan_t *
hb_shape_plan_create_cached (hb_face_t *face,
const hb_segment_properties_t *props,
const hb_feature_t *user_features,
unsigned int num_user_features,
const char * const *shaper_list)
{
if (num_user_features)
return hb_shape_plan_create (face, props, user_features, num_user_features, shaper_list);
hb_shape_plan_proposal_t proposal = {
*props,
shaper_list,
NULL
};
if (shaper_list) {
/* Choose shaper. Adapted from hb_shape_plan_plan(). */
#define HB_SHAPER_PLAN(shaper) \
HB_STMT_START { \
if (hb_##shaper##_shaper_face_data_ensure (face)) \
proposal.shaper_func = _hb_##shaper##_shape; \
} HB_STMT_END
for (const char * const *shaper_item = shaper_list; *shaper_item; shaper_item++)
if (0)
;
#define HB_SHAPER_IMPLEMENT(shaper) \
else if (0 == strcmp (*shaper_item, #shaper)) \
HB_SHAPER_PLAN (shaper);
#include "hb-shaper-list.hh"
#undef HB_SHAPER_IMPLEMENT
#undef HB_SHAPER_PLAN
if (unlikely (!proposal.shaper_list))
return hb_shape_plan_get_empty ();
}
retry:
hb_face_t::plan_node_t *cached_plan_nodes = (hb_face_t::plan_node_t *) hb_atomic_ptr_get (&face->shape_plans);
for (hb_face_t::plan_node_t *node = cached_plan_nodes; node; node = node->next)
if (hb_shape_plan_matches (node->shape_plan, &proposal))
return hb_shape_plan_reference (node->shape_plan);
/* Not found. */
hb_shape_plan_t *shape_plan = hb_shape_plan_create (face, props, user_features, num_user_features, shaper_list);
hb_face_t::plan_node_t *node = (hb_face_t::plan_node_t *) calloc (1, sizeof (hb_face_t::plan_node_t));
if (unlikely (!node))
return shape_plan;
node->shape_plan = shape_plan;
node->next = cached_plan_nodes;
if (!hb_atomic_ptr_cmpexch (&face->shape_plans, cached_plan_nodes, node)) {
hb_shape_plan_destroy (shape_plan);
free (node);
goto retry;
}
/* Release our reference on face. */
hb_face_destroy (face);
return hb_shape_plan_reference (shape_plan);
}
/**
* hb_shape_plan_get_shaper:
* @shape_plan: a shape plan.
*
*
*
* Return value: (transfer none):
*
* Since: 1.0
**/
const char *
hb_shape_plan_get_shaper (hb_shape_plan_t *shape_plan)
{
return shape_plan->shaper_name;
}