514 lines
12 KiB
C++
514 lines
12 KiB
C++
|
/*
|
||
|
|
* 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.hh"
|
||
|
|
#include "hb-shape-plan.hh"
|
||
|
|
#include "hb-shaper.hh"
|
||
|
|
#include "hb-font.hh"
|
||
|
|
#include "hb-buffer.hh"
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* SECTION:hb-shape-plan
|
||
|
|
* @title: hb-shape-plan
|
||
|
|
* @short_description: Object representing a shaping plan
|
||
|
|
* @include: hb.h
|
||
|
|
*
|
||
|
|
* Shape plans are not used for shaping directly, but can be access to query
|
||
|
|
* certain information about how shaping will perform given a set of input
|
||
|
|
* parameters (script, language, direction, features, etc.)
|
||
|
|
* Most client would not need to deal with shape plans directly.
|
||
|
|
**/
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* hb_shape_plan_key_t
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool
|
||
|
|
hb_shape_plan_key_t::init (bool copy,
|
||
|
|
hb_face_t *face,
|
||
|
|
const hb_segment_properties_t *props,
|
||
|
|
const hb_feature_t *user_features,
|
||
|
|
unsigned int num_user_features,
|
||
|
|
const int *coords,
|
||
|
|
unsigned int num_coords,
|
||
|
|
const char * const *shaper_list)
|
||
|
|
{
|
||
|
|
hb_feature_t *features = nullptr;
|
||
|
|
if (copy && num_user_features && !(features = (hb_feature_t *) calloc (num_user_features, sizeof (hb_feature_t))))
|
||
|
|
goto bail;
|
||
|
|
|
||
|
|
this->props = *props;
|
||
|
|
this->num_user_features = num_user_features;
|
||
|
|
this->user_features = copy ? features : user_features;
|
||
|
|
if (copy && num_user_features)
|
||
|
|
{
|
||
|
|
memcpy (features, user_features, num_user_features * sizeof (hb_feature_t));
|
||
|
|
/* Make start/end uniform to easier catch bugs. */
|
||
|
|
for (unsigned int i = 0; i < num_user_features; i++)
|
||
|
|
{
|
||
|
|
if (features[0].start != HB_FEATURE_GLOBAL_START)
|
||
|
|
features[0].start = 1;
|
||
|
|
if (features[0].end != HB_FEATURE_GLOBAL_END)
|
||
|
|
features[0].end = 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
this->shaper_func = nullptr;
|
||
|
|
this->shaper_name = nullptr;
|
||
|
|
#ifndef HB_NO_OT_SHAPE
|
||
|
|
this->ot.init (face, coords, num_coords);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Choose shaper.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define HB_SHAPER_PLAN(shaper) \
|
||
|
|
HB_STMT_START { \
|
||
|
|
if (face->data.shaper) \
|
||
|
|
{ \
|
||
|
|
this->shaper_func = _hb_##shaper##_shape; \
|
||
|
|
this->shaper_name = #shaper; \
|
||
|
|
return true; \
|
||
|
|
} \
|
||
|
|
} HB_STMT_END
|
||
|
|
|
||
|
|
if (unlikely (shaper_list))
|
||
|
|
{
|
||
|
|
for (; *shaper_list; shaper_list++)
|
||
|
|
if (false)
|
||
|
|
;
|
||
|
|
#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
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
const hb_shaper_entry_t *shapers = _hb_shapers_get ();
|
||
|
|
for (unsigned int i = 0; i < HB_SHAPERS_COUNT; i++)
|
||
|
|
if (false)
|
||
|
|
;
|
||
|
|
#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
|
||
|
|
}
|
||
|
|
#undef HB_SHAPER_PLAN
|
||
|
|
|
||
|
|
bail:
|
||
|
|
::free (features);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool
|
||
|
|
hb_shape_plan_key_t::user_features_match (const hb_shape_plan_key_t *other)
|
||
|
|
{
|
||
|
|
if (this->num_user_features != other->num_user_features)
|
||
|
|
return false;
|
||
|
|
for (unsigned int i = 0; i < num_user_features; i++)
|
||
|
|
{
|
||
|
|
if (this->user_features[i].tag != other->user_features[i].tag ||
|
||
|
|
this->user_features[i].value != other->user_features[i].value ||
|
||
|
|
(this->user_features[i].start == HB_FEATURE_GLOBAL_START &&
|
||
|
|
this->user_features[i].end == HB_FEATURE_GLOBAL_END) !=
|
||
|
|
(other->user_features[i].start == HB_FEATURE_GLOBAL_START &&
|
||
|
|
other->user_features[i].end == HB_FEATURE_GLOBAL_END))
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool
|
||
|
|
hb_shape_plan_key_t::equal (const hb_shape_plan_key_t *other)
|
||
|
|
{
|
||
|
|
return hb_segment_properties_equal (&this->props, &other->props) &&
|
||
|
|
this->user_features_match (other) &&
|
||
|
|
#ifndef HB_NO_OT_SHAPE
|
||
|
|
this->ot.equal (&other->ot) &&
|
||
|
|
#endif
|
||
|
|
this->shaper_func == other->shaper_func;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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: 0.9.7
|
||
|
|
**/
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
return hb_shape_plan_create2 (face, props,
|
||
|
|
user_features, num_user_features,
|
||
|
|
nullptr, 0,
|
||
|
|
shaper_list);
|
||
|
|
}
|
||
|
|
|
||
|
|
hb_shape_plan_t *
|
||
|
|
hb_shape_plan_create2 (hb_face_t *face,
|
||
|
|
const hb_segment_properties_t *props,
|
||
|
|
const hb_feature_t *user_features,
|
||
|
|
unsigned int num_user_features,
|
||
|
|
const int *coords,
|
||
|
|
unsigned int num_coords,
|
||
|
|
const char * const *shaper_list)
|
||
|
|
{
|
||
|
|
DEBUG_MSG_FUNC (SHAPE_PLAN, nullptr,
|
||
|
|
"face=%p num_features=%d num_coords=%d shaper_list=%p",
|
||
|
|
face,
|
||
|
|
num_user_features,
|
||
|
|
num_coords,
|
||
|
|
shaper_list);
|
||
|
|
|
||
|
|
assert (props->direction != HB_DIRECTION_INVALID);
|
||
|
|
|
||
|
|
hb_shape_plan_t *shape_plan;
|
||
|
|
|
||
|
|
if (unlikely (!props))
|
||
|
|
goto bail;
|
||
|
|
if (!(shape_plan = hb_object_create<hb_shape_plan_t> ()))
|
||
|
|
goto bail;
|
||
|
|
|
||
|
|
if (unlikely (!face))
|
||
|
|
face = hb_face_get_empty ();
|
||
|
|
hb_face_make_immutable (face);
|
||
|
|
shape_plan->face_unsafe = face;
|
||
|
|
|
||
|
|
if (unlikely (!shape_plan->key.init (true,
|
||
|
|
face,
|
||
|
|
props,
|
||
|
|
user_features,
|
||
|
|
num_user_features,
|
||
|
|
coords,
|
||
|
|
num_coords,
|
||
|
|
shaper_list)))
|
||
|
|
goto bail2;
|
||
|
|
#ifndef HB_NO_OT_SHAPE
|
||
|
|
if (unlikely (!shape_plan->ot.init0 (face, &shape_plan->key)))
|
||
|
|
goto bail3;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return shape_plan;
|
||
|
|
|
||
|
|
#ifndef HB_NO_OT_SHAPE
|
||
|
|
bail3:
|
||
|
|
#endif
|
||
|
|
shape_plan->key.free ();
|
||
|
|
bail2:
|
||
|
|
free (shape_plan);
|
||
|
|
bail:
|
||
|
|
return hb_shape_plan_get_empty ();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* hb_shape_plan_get_empty:
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* Return value: (transfer full):
|
||
|
|
*
|
||
|
|
* Since: 0.9.7
|
||
|
|
**/
|
||
|
|
hb_shape_plan_t *
|
||
|
|
hb_shape_plan_get_empty ()
|
||
|
|
{
|
||
|
|
return const_cast<hb_shape_plan_t *> (&Null (hb_shape_plan_t));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* hb_shape_plan_reference: (skip)
|
||
|
|
* @shape_plan: a shape plan.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* Return value: (transfer full):
|
||
|
|
*
|
||
|
|
* Since: 0.9.7
|
||
|
|
**/
|
||
|
|
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: 0.9.7
|
||
|
|
**/
|
||
|
|
void
|
||
|
|
hb_shape_plan_destroy (hb_shape_plan_t *shape_plan)
|
||
|
|
{
|
||
|
|
if (!hb_object_destroy (shape_plan)) return;
|
||
|
|
|
||
|
|
#ifndef HB_NO_OT_SHAPE
|
||
|
|
shape_plan->ot.fini ();
|
||
|
|
#endif
|
||
|
|
shape_plan->key.free ();
|
||
|
|
free (shape_plan);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* hb_shape_plan_set_user_data: (skip)
|
||
|
|
* @shape_plan: a shape plan.
|
||
|
|
* @key:
|
||
|
|
* @data:
|
||
|
|
* @destroy:
|
||
|
|
* @replace:
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* Return value:
|
||
|
|
*
|
||
|
|
* Since: 0.9.7
|
||
|
|
**/
|
||
|
|
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: 0.9.7
|
||
|
|
**/
|
||
|
|
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_get_shaper:
|
||
|
|
* @shape_plan: a shape plan.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* Return value: (transfer none):
|
||
|
|
*
|
||
|
|
* Since: 0.9.7
|
||
|
|
**/
|
||
|
|
const char *
|
||
|
|
hb_shape_plan_get_shaper (hb_shape_plan_t *shape_plan)
|
||
|
|
{
|
||
|
|
return shape_plan->key.shaper_name;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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: 0.9.7
|
||
|
|
**/
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
DEBUG_MSG_FUNC (SHAPE_PLAN, shape_plan,
|
||
|
|
"num_features=%d shaper_func=%p, shaper_name=%s",
|
||
|
|
num_features,
|
||
|
|
shape_plan->key.shaper_func,
|
||
|
|
shape_plan->key.shaper_name);
|
||
|
|
|
||
|
|
if (unlikely (!buffer->len))
|
||
|
|
return true;
|
||
|
|
|
||
|
|
assert (!hb_object_is_immutable (buffer));
|
||
|
|
assert (buffer->content_type == HB_BUFFER_CONTENT_TYPE_UNICODE);
|
||
|
|
|
||
|
|
if (unlikely (hb_object_is_inert (shape_plan)))
|
||
|
|
return false;
|
||
|
|
|
||
|
|
assert (shape_plan->face_unsafe == font->face);
|
||
|
|
assert (hb_segment_properties_equal (&shape_plan->key.props, &buffer->props));
|
||
|
|
|
||
|
|
#define HB_SHAPER_EXECUTE(shaper) \
|
||
|
|
HB_STMT_START { \
|
||
|
|
return font->data.shaper && \
|
||
|
|
_hb_##shaper##_shape (shape_plan, font, buffer, features, num_features); \
|
||
|
|
} HB_STMT_END
|
||
|
|
|
||
|
|
if (false)
|
||
|
|
;
|
||
|
|
#define HB_SHAPER_IMPLEMENT(shaper) \
|
||
|
|
else if (shape_plan->key.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
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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: 0.9.7
|
||
|
|
**/
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
return hb_shape_plan_create_cached2 (face, props,
|
||
|
|
user_features, num_user_features,
|
||
|
|
nullptr, 0,
|
||
|
|
shaper_list);
|
||
|
|
}
|
||
|
|
|
||
|
|
hb_shape_plan_t *
|
||
|
|
hb_shape_plan_create_cached2 (hb_face_t *face,
|
||
|
|
const hb_segment_properties_t *props,
|
||
|
|
const hb_feature_t *user_features,
|
||
|
|
unsigned int num_user_features,
|
||
|
|
const int *coords,
|
||
|
|
unsigned int num_coords,
|
||
|
|
const char * const *shaper_list)
|
||
|
|
{
|
||
|
|
DEBUG_MSG_FUNC (SHAPE_PLAN, nullptr,
|
||
|
|
"face=%p num_features=%d shaper_list=%p",
|
||
|
|
face,
|
||
|
|
num_user_features,
|
||
|
|
shaper_list);
|
||
|
|
|
||
|
|
retry:
|
||
|
|
hb_face_t::plan_node_t *cached_plan_nodes = face->shape_plans;
|
||
|
|
|
||
|
|
bool dont_cache = hb_object_is_inert (face);
|
||
|
|
|
||
|
|
if (likely (!dont_cache))
|
||
|
|
{
|
||
|
|
hb_shape_plan_key_t key;
|
||
|
|
if (!key.init (false,
|
||
|
|
face,
|
||
|
|
props,
|
||
|
|
user_features,
|
||
|
|
num_user_features,
|
||
|
|
coords,
|
||
|
|
num_coords,
|
||
|
|
shaper_list))
|
||
|
|
return hb_shape_plan_get_empty ();
|
||
|
|
|
||
|
|
for (hb_face_t::plan_node_t *node = cached_plan_nodes; node; node = node->next)
|
||
|
|
if (node->shape_plan->key.equal (&key))
|
||
|
|
{
|
||
|
|
DEBUG_MSG_FUNC (SHAPE_PLAN, node->shape_plan, "fulfilled from cache");
|
||
|
|
return hb_shape_plan_reference (node->shape_plan);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
hb_shape_plan_t *shape_plan = hb_shape_plan_create2 (face, props,
|
||
|
|
user_features, num_user_features,
|
||
|
|
coords, num_coords,
|
||
|
|
shaper_list);
|
||
|
|
|
||
|
|
if (unlikely (dont_cache))
|
||
|
|
return shape_plan;
|
||
|
|
|
||
|
|
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 (unlikely (!face->shape_plans.cmpexch (cached_plan_nodes, node)))
|
||
|
|
{
|
||
|
|
hb_shape_plan_destroy (shape_plan);
|
||
|
|
free (node);
|
||
|
|
goto retry;
|
||
|
|
}
|
||
|
|
DEBUG_MSG_FUNC (SHAPE_PLAN, shape_plan, "inserted into cache");
|
||
|
|
|
||
|
|
return hb_shape_plan_reference (shape_plan);
|
||
|
|
}
|