fa333e34d6
Was good idea, but with C++ types with constructor/destructor, was getting in the way as compiler was destructing those items where it was not desired. Since C++ does not allow zero-sized arrays, just remove it...
724 lines
14 KiB
C++
724 lines
14 KiB
C++
/*
|
|
* Copyright © 2009 Red Hat, Inc.
|
|
* 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.
|
|
*
|
|
* Red Hat Author(s): Behdad Esfahbod
|
|
* Google Author(s): Behdad Esfahbod
|
|
*/
|
|
|
|
#include "hb.hh"
|
|
|
|
#include "hb-face.hh"
|
|
#include "hb-blob.hh"
|
|
#include "hb-open-file.hh"
|
|
#include "hb-ot-face.hh"
|
|
#include "hb-ot-cmap-table.hh"
|
|
|
|
|
|
/**
|
|
* SECTION:hb-face
|
|
* @title: hb-face
|
|
* @short_description: Font face objects
|
|
* @include: hb.h
|
|
*
|
|
* Font face is objects represent a single face in a font family.
|
|
* More exactly, a font face represents a single face in a binary font file.
|
|
* Font faces are typically built from a binary blob and a face index.
|
|
* Font faces are used to create fonts.
|
|
**/
|
|
|
|
|
|
/**
|
|
* hb_face_count:
|
|
* @blob: a blob.
|
|
*
|
|
* Get number of faces in a blob.
|
|
*
|
|
* Return value: Number of faces in @blob
|
|
*
|
|
* Since: 1.7.7
|
|
**/
|
|
unsigned int
|
|
hb_face_count (hb_blob_t *blob)
|
|
{
|
|
if (unlikely (!blob))
|
|
return 0;
|
|
|
|
/* TODO We shouldn't be sanitizing blob. Port to run sanitizer and return if not sane. */
|
|
/* Make API signature const after. */
|
|
hb_blob_t *sanitized = hb_sanitize_context_t ().sanitize_blob<OT::OpenTypeFontFile> (hb_blob_reference (blob));
|
|
const OT::OpenTypeFontFile& ot = *sanitized->as<OT::OpenTypeFontFile> ();
|
|
unsigned int ret = ot.get_face_count ();
|
|
hb_blob_destroy (sanitized);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* hb_face_t
|
|
*/
|
|
|
|
DEFINE_NULL_INSTANCE (hb_face_t) =
|
|
{
|
|
HB_OBJECT_HEADER_STATIC,
|
|
|
|
nullptr, /* reference_table_func */
|
|
nullptr, /* user_data */
|
|
nullptr, /* destroy */
|
|
|
|
0, /* index */
|
|
HB_ATOMIC_INT_INIT (1000), /* upem */
|
|
HB_ATOMIC_INT_INIT (0), /* num_glyphs */
|
|
|
|
/* Zero for the rest is fine. */
|
|
};
|
|
|
|
|
|
/**
|
|
* hb_face_create_for_tables:
|
|
* @reference_table_func: (closure user_data) (destroy destroy) (scope notified):
|
|
* @user_data:
|
|
* @destroy:
|
|
*
|
|
*
|
|
*
|
|
* Return value: (transfer full)
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_face_t *
|
|
hb_face_create_for_tables (hb_reference_table_func_t reference_table_func,
|
|
void *user_data,
|
|
hb_destroy_func_t destroy)
|
|
{
|
|
hb_face_t *face;
|
|
|
|
if (!reference_table_func || !(face = hb_object_create<hb_face_t> ())) {
|
|
if (destroy)
|
|
destroy (user_data);
|
|
return hb_face_get_empty ();
|
|
}
|
|
|
|
face->reference_table_func = reference_table_func;
|
|
face->user_data = user_data;
|
|
face->destroy = destroy;
|
|
|
|
face->num_glyphs.set_relaxed (-1);
|
|
|
|
face->data.init0 (face);
|
|
face->table.init0 (face);
|
|
|
|
return face;
|
|
}
|
|
|
|
|
|
typedef struct hb_face_for_data_closure_t {
|
|
hb_blob_t *blob;
|
|
unsigned int index;
|
|
} hb_face_for_data_closure_t;
|
|
|
|
static hb_face_for_data_closure_t *
|
|
_hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
|
|
{
|
|
hb_face_for_data_closure_t *closure;
|
|
|
|
closure = (hb_face_for_data_closure_t *) calloc (1, sizeof (hb_face_for_data_closure_t));
|
|
if (unlikely (!closure))
|
|
return nullptr;
|
|
|
|
closure->blob = blob;
|
|
closure->index = index;
|
|
|
|
return closure;
|
|
}
|
|
|
|
static void
|
|
_hb_face_for_data_closure_destroy (void *data)
|
|
{
|
|
hb_face_for_data_closure_t *closure = (hb_face_for_data_closure_t *) data;
|
|
|
|
hb_blob_destroy (closure->blob);
|
|
free (closure);
|
|
}
|
|
|
|
static hb_blob_t *
|
|
_hb_face_for_data_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
|
|
{
|
|
hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;
|
|
|
|
if (tag == HB_TAG_NONE)
|
|
return hb_blob_reference (data->blob);
|
|
|
|
const OT::OpenTypeFontFile &ot_file = *data->blob->as<OT::OpenTypeFontFile> ();
|
|
unsigned int base_offset;
|
|
const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index, &base_offset);
|
|
|
|
const OT::OpenTypeTable &table = ot_face.get_table_by_tag (tag);
|
|
|
|
hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, base_offset + table.offset, table.length);
|
|
|
|
return blob;
|
|
}
|
|
|
|
/**
|
|
* hb_face_create: (Xconstructor)
|
|
* @blob:
|
|
* @index:
|
|
*
|
|
*
|
|
*
|
|
* Return value: (transfer full):
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_face_t *
|
|
hb_face_create (hb_blob_t *blob,
|
|
unsigned int index)
|
|
{
|
|
hb_face_t *face;
|
|
|
|
if (unlikely (!blob))
|
|
blob = hb_blob_get_empty ();
|
|
|
|
hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (hb_sanitize_context_t ().sanitize_blob<OT::OpenTypeFontFile> (hb_blob_reference (blob)), index);
|
|
|
|
if (unlikely (!closure))
|
|
return hb_face_get_empty ();
|
|
|
|
face = hb_face_create_for_tables (_hb_face_for_data_reference_table,
|
|
closure,
|
|
_hb_face_for_data_closure_destroy);
|
|
|
|
face->index = index;
|
|
|
|
return face;
|
|
}
|
|
|
|
/**
|
|
* hb_face_get_empty:
|
|
*
|
|
*
|
|
*
|
|
* Return value: (transfer full)
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_face_t *
|
|
hb_face_get_empty ()
|
|
{
|
|
return const_cast<hb_face_t *> (&Null(hb_face_t));
|
|
}
|
|
|
|
|
|
/**
|
|
* hb_face_reference: (skip)
|
|
* @face: a face.
|
|
*
|
|
*
|
|
*
|
|
* Return value:
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_face_t *
|
|
hb_face_reference (hb_face_t *face)
|
|
{
|
|
return hb_object_reference (face);
|
|
}
|
|
|
|
/**
|
|
* hb_face_destroy: (skip)
|
|
* @face: a face.
|
|
*
|
|
*
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
void
|
|
hb_face_destroy (hb_face_t *face)
|
|
{
|
|
if (!hb_object_destroy (face)) return;
|
|
|
|
for (hb_face_t::plan_node_t *node = face->shape_plans; node; )
|
|
{
|
|
hb_face_t::plan_node_t *next = node->next;
|
|
hb_shape_plan_destroy (node->shape_plan);
|
|
free (node);
|
|
node = next;
|
|
}
|
|
|
|
face->data.fini ();
|
|
face->table.fini ();
|
|
|
|
if (face->destroy)
|
|
face->destroy (face->user_data);
|
|
|
|
free (face);
|
|
}
|
|
|
|
/**
|
|
* hb_face_set_user_data: (skip)
|
|
* @face: a face.
|
|
* @key:
|
|
* @data:
|
|
* @destroy:
|
|
* @replace:
|
|
*
|
|
*
|
|
*
|
|
* Return value:
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_bool_t
|
|
hb_face_set_user_data (hb_face_t *face,
|
|
hb_user_data_key_t *key,
|
|
void * data,
|
|
hb_destroy_func_t destroy,
|
|
hb_bool_t replace)
|
|
{
|
|
return hb_object_set_user_data (face, key, data, destroy, replace);
|
|
}
|
|
|
|
/**
|
|
* hb_face_get_user_data: (skip)
|
|
* @face: a face.
|
|
* @key:
|
|
*
|
|
*
|
|
*
|
|
* Return value: (transfer none):
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
void *
|
|
hb_face_get_user_data (const hb_face_t *face,
|
|
hb_user_data_key_t *key)
|
|
{
|
|
return hb_object_get_user_data (face, key);
|
|
}
|
|
|
|
/**
|
|
* hb_face_make_immutable:
|
|
* @face: a face.
|
|
*
|
|
*
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
void
|
|
hb_face_make_immutable (hb_face_t *face)
|
|
{
|
|
if (hb_object_is_immutable (face))
|
|
return;
|
|
|
|
hb_object_make_immutable (face);
|
|
}
|
|
|
|
/**
|
|
* hb_face_is_immutable:
|
|
* @face: a face.
|
|
*
|
|
*
|
|
*
|
|
* Return value:
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_bool_t
|
|
hb_face_is_immutable (const hb_face_t *face)
|
|
{
|
|
return hb_object_is_immutable (face);
|
|
}
|
|
|
|
|
|
/**
|
|
* hb_face_reference_table:
|
|
* @face: a face.
|
|
* @tag:
|
|
*
|
|
*
|
|
*
|
|
* Return value: (transfer full):
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_blob_t *
|
|
hb_face_reference_table (const hb_face_t *face,
|
|
hb_tag_t tag)
|
|
{
|
|
return face->reference_table (tag);
|
|
}
|
|
|
|
/**
|
|
* hb_face_reference_blob:
|
|
* @face: a face.
|
|
*
|
|
*
|
|
*
|
|
* Return value: (transfer full):
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_blob_t *
|
|
hb_face_reference_blob (hb_face_t *face)
|
|
{
|
|
return face->reference_table (HB_TAG_NONE);
|
|
}
|
|
|
|
/**
|
|
* hb_face_set_index:
|
|
* @face: a face.
|
|
* @index:
|
|
*
|
|
*
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
void
|
|
hb_face_set_index (hb_face_t *face,
|
|
unsigned int index)
|
|
{
|
|
if (hb_object_is_immutable (face))
|
|
return;
|
|
|
|
face->index = index;
|
|
}
|
|
|
|
/**
|
|
* hb_face_get_index:
|
|
* @face: a face.
|
|
*
|
|
*
|
|
*
|
|
* Return value:
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
unsigned int
|
|
hb_face_get_index (const hb_face_t *face)
|
|
{
|
|
return face->index;
|
|
}
|
|
|
|
/**
|
|
* hb_face_set_upem:
|
|
* @face: a face.
|
|
* @upem:
|
|
*
|
|
*
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
void
|
|
hb_face_set_upem (hb_face_t *face,
|
|
unsigned int upem)
|
|
{
|
|
if (hb_object_is_immutable (face))
|
|
return;
|
|
|
|
face->upem.set_relaxed (upem);
|
|
}
|
|
|
|
/**
|
|
* hb_face_get_upem:
|
|
* @face: a face.
|
|
*
|
|
*
|
|
*
|
|
* Return value:
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
unsigned int
|
|
hb_face_get_upem (const hb_face_t *face)
|
|
{
|
|
return face->get_upem ();
|
|
}
|
|
|
|
/**
|
|
* hb_face_set_glyph_count:
|
|
* @face: a face.
|
|
* @glyph_count:
|
|
*
|
|
*
|
|
*
|
|
* Since: 0.9.7
|
|
**/
|
|
void
|
|
hb_face_set_glyph_count (hb_face_t *face,
|
|
unsigned int glyph_count)
|
|
{
|
|
if (hb_object_is_immutable (face))
|
|
return;
|
|
|
|
face->num_glyphs.set_relaxed (glyph_count);
|
|
}
|
|
|
|
/**
|
|
* hb_face_get_glyph_count:
|
|
* @face: a face.
|
|
*
|
|
*
|
|
*
|
|
* Return value:
|
|
*
|
|
* Since: 0.9.7
|
|
**/
|
|
unsigned int
|
|
hb_face_get_glyph_count (const hb_face_t *face)
|
|
{
|
|
return face->get_num_glyphs ();
|
|
}
|
|
|
|
/**
|
|
* hb_face_get_table_tags:
|
|
* @face: a face.
|
|
* @start_offset: index of first tag to return.
|
|
* @table_count: input length of @table_tags array, output number of items written.
|
|
* @table_tags: array to write tags into.
|
|
*
|
|
* Retrieves table tags for a face, if possible.
|
|
*
|
|
* Return value: total number of tables, or 0 if not possible to list.
|
|
*
|
|
* Since: 1.6.0
|
|
**/
|
|
unsigned int
|
|
hb_face_get_table_tags (const hb_face_t *face,
|
|
unsigned int start_offset,
|
|
unsigned int *table_count, /* IN/OUT */
|
|
hb_tag_t *table_tags /* OUT */)
|
|
{
|
|
if (face->destroy != (hb_destroy_func_t) _hb_face_for_data_closure_destroy)
|
|
{
|
|
if (table_count)
|
|
*table_count = 0;
|
|
return 0;
|
|
}
|
|
|
|
hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) face->user_data;
|
|
|
|
const OT::OpenTypeFontFile &ot_file = *data->blob->as<OT::OpenTypeFontFile> ();
|
|
const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
|
|
|
|
return ot_face.get_table_tags (start_offset, table_count, table_tags);
|
|
}
|
|
|
|
|
|
/*
|
|
* Character set.
|
|
*/
|
|
|
|
|
|
/**
|
|
* hb_face_collect_unicodes:
|
|
* @face: font face.
|
|
* @out: set to add Unicode characters covered by @face to.
|
|
*
|
|
* Since: 1.9.0
|
|
*/
|
|
void
|
|
hb_face_collect_unicodes (hb_face_t *face,
|
|
hb_set_t *out)
|
|
{
|
|
face->table.cmap->collect_unicodes (out);
|
|
}
|
|
|
|
/**
|
|
* hb_face_collect_variation_selectors:
|
|
* @face: font face.
|
|
* @out: set to add Variation Selector characters covered by @face to.
|
|
*
|
|
*
|
|
*
|
|
* Since: 1.9.0
|
|
*/
|
|
void
|
|
hb_face_collect_variation_selectors (hb_face_t *face,
|
|
hb_set_t *out)
|
|
{
|
|
face->table.cmap->collect_variation_selectors (out);
|
|
}
|
|
|
|
/**
|
|
* hb_face_collect_variation_unicodes:
|
|
* @face: font face.
|
|
* @out: set to add Unicode characters for @variation_selector covered by @face to.
|
|
*
|
|
*
|
|
*
|
|
* Since: 1.9.0
|
|
*/
|
|
void
|
|
hb_face_collect_variation_unicodes (hb_face_t *face,
|
|
hb_codepoint_t variation_selector,
|
|
hb_set_t *out)
|
|
{
|
|
face->table.cmap->collect_variation_unicodes (variation_selector, out);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* face-builder: A face that has add_table().
|
|
*/
|
|
|
|
struct hb_face_builder_data_t
|
|
{
|
|
struct table_entry_t
|
|
{
|
|
int cmp (hb_tag_t t) const
|
|
{
|
|
if (t < tag) return -1;
|
|
if (t > tag) return -1;
|
|
return 0;
|
|
}
|
|
|
|
hb_tag_t tag;
|
|
hb_blob_t *blob;
|
|
};
|
|
|
|
hb_vector_t<table_entry_t> tables;
|
|
};
|
|
|
|
static hb_face_builder_data_t *
|
|
_hb_face_builder_data_create ()
|
|
{
|
|
hb_face_builder_data_t *data = (hb_face_builder_data_t *) calloc (1, sizeof (hb_face_builder_data_t));
|
|
if (unlikely (!data))
|
|
return nullptr;
|
|
|
|
data->tables.init ();
|
|
|
|
return data;
|
|
}
|
|
|
|
static void
|
|
_hb_face_builder_data_destroy (void *user_data)
|
|
{
|
|
hb_face_builder_data_t *data = (hb_face_builder_data_t *) user_data;
|
|
|
|
for (unsigned int i = 0; i < data->tables.length; i++)
|
|
hb_blob_destroy (data->tables[i].blob);
|
|
|
|
data->tables.fini ();
|
|
|
|
free (data);
|
|
}
|
|
|
|
static hb_blob_t *
|
|
_hb_face_builder_data_reference_blob (hb_face_builder_data_t *data)
|
|
{
|
|
|
|
unsigned int table_count = data->tables.length;
|
|
unsigned int face_length = table_count * 16 + 12;
|
|
|
|
for (unsigned int i = 0; i < table_count; i++)
|
|
face_length += hb_ceil_to_4 (hb_blob_get_length (data->tables[i].blob));
|
|
|
|
char *buf = (char *) malloc (face_length);
|
|
if (unlikely (!buf))
|
|
return nullptr;
|
|
|
|
hb_serialize_context_t c (buf, face_length);
|
|
c.propagate_error (data->tables);
|
|
OT::OpenTypeFontFile *f = c.start_serialize<OT::OpenTypeFontFile> ();
|
|
|
|
bool is_cff = data->tables.lsearch (HB_TAG ('C','F','F',' ')) || data->tables.lsearch (HB_TAG ('C','F','F','2'));
|
|
hb_tag_t sfnt_tag = is_cff ? OT::OpenTypeFontFile::CFFTag : OT::OpenTypeFontFile::TrueTypeTag;
|
|
|
|
bool ret = f->serialize_single (&c, sfnt_tag, data->tables.as_array ());
|
|
|
|
c.end_serialize ();
|
|
|
|
if (unlikely (!ret))
|
|
{
|
|
free (buf);
|
|
return nullptr;
|
|
}
|
|
|
|
return hb_blob_create (buf, face_length, HB_MEMORY_MODE_WRITABLE, buf, free);
|
|
}
|
|
|
|
static hb_blob_t *
|
|
_hb_face_builder_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
|
|
{
|
|
hb_face_builder_data_t *data = (hb_face_builder_data_t *) user_data;
|
|
|
|
if (!tag)
|
|
return _hb_face_builder_data_reference_blob (data);
|
|
|
|
hb_face_builder_data_t::table_entry_t *entry = data->tables.lsearch (tag);
|
|
if (entry)
|
|
return hb_blob_reference (entry->blob);
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
/**
|
|
* hb_face_builder_create:
|
|
*
|
|
* Creates a #hb_face_t that can be used with hb_face_builder_add_table().
|
|
* After tables are added to the face, it can be compiled to a binary
|
|
* font file by calling hb_face_reference_blob().
|
|
*
|
|
* Return value: (transfer full): New face.
|
|
*
|
|
* Since: 1.9.0
|
|
**/
|
|
hb_face_t *
|
|
hb_face_builder_create ()
|
|
{
|
|
hb_face_builder_data_t *data = _hb_face_builder_data_create ();
|
|
if (unlikely (!data)) return hb_face_get_empty ();
|
|
|
|
return hb_face_create_for_tables (_hb_face_builder_reference_table,
|
|
data,
|
|
_hb_face_builder_data_destroy);
|
|
}
|
|
|
|
/**
|
|
* hb_face_builder_add_table:
|
|
*
|
|
* Add table for @tag with data provided by @blob to the face. @face must
|
|
* be created using hb_face_builder_create().
|
|
*
|
|
* Since: 1.9.0
|
|
**/
|
|
hb_bool_t
|
|
hb_face_builder_add_table (hb_face_t *face, hb_tag_t tag, hb_blob_t *blob)
|
|
{
|
|
if (unlikely (face->destroy != (hb_destroy_func_t) _hb_face_builder_data_destroy))
|
|
return false;
|
|
|
|
hb_face_builder_data_t *data = (hb_face_builder_data_t *) face->user_data;
|
|
hb_face_builder_data_t::table_entry_t *entry = data->tables.push ();
|
|
|
|
entry->tag = tag;
|
|
entry->blob = hb_blob_reference (blob);
|
|
|
|
return true;
|
|
}
|