482 lines
8.7 KiB
C++
482 lines
8.7 KiB
C++
/*
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* Copyright © 2009 Red Hat, Inc.
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* Copyright © 2012 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb-private.hh"
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#include "hb-ot-layout-private.hh"
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#include "hb-font-private.hh"
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#include "hb-open-file-private.hh"
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#include "hb-ot-head-table.hh"
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#include "hb-ot-maxp-table.hh"
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#include "hb-cache-private.hh"
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#include <string.h>
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/*
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* hb_face_t
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*/
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const hb_face_t _hb_face_nil = {
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HB_OBJECT_HEADER_STATIC,
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true, /* immutable */
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NULL, /* reference_table_func */
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NULL, /* user_data */
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NULL, /* destroy */
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0, /* index */
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1000, /* upem */
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0, /* num_glyphs */
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{
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#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
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#include "hb-shaper-list.hh"
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#undef HB_SHAPER_IMPLEMENT
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},
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NULL, /* shape_plans */
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};
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/**
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* hb_face_create_for_tables:
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* @reference_table_func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Return value: (transfer full)
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*
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* Since: 1.0
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**/
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hb_face_t *
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hb_face_create_for_tables (hb_reference_table_func_t reference_table_func,
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void *user_data,
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hb_destroy_func_t destroy)
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{
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hb_face_t *face;
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if (!reference_table_func || !(face = hb_object_create<hb_face_t> ())) {
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if (destroy)
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destroy (user_data);
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return hb_face_get_empty ();
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}
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face->reference_table_func = reference_table_func;
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face->user_data = user_data;
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face->destroy = destroy;
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face->upem = 0;
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face->num_glyphs = (unsigned int) -1;
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return face;
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}
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typedef struct hb_face_for_data_closure_t {
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hb_blob_t *blob;
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unsigned int index;
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} hb_face_for_data_closure_t;
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static hb_face_for_data_closure_t *
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_hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
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{
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hb_face_for_data_closure_t *closure;
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closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t));
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if (unlikely (!closure))
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return NULL;
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closure->blob = blob;
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closure->index = index;
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return closure;
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}
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static void
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_hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
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{
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hb_blob_destroy (closure->blob);
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free (closure);
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}
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static hb_blob_t *
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_hb_face_for_data_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
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{
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hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;
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if (tag == HB_TAG_NONE)
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return hb_blob_reference (data->blob);
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const OT::OpenTypeFontFile &ot_file = *OT::Sanitizer<OT::OpenTypeFontFile>::lock_instance (data->blob);
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const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
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const OT::OpenTypeTable &table = ot_face.get_table_by_tag (tag);
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hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);
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return blob;
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}
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/**
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* hb_face_create: (Xconstructor)
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* @blob:
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* @index:
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*
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*
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*
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* Return value: (transfer full):
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*
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* Since: 1.0
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**/
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hb_face_t *
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hb_face_create (hb_blob_t *blob,
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unsigned int index)
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{
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hb_face_t *face;
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if (unlikely (!blob || !hb_blob_get_length (blob)))
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return hb_face_get_empty ();
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hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (OT::Sanitizer<OT::OpenTypeFontFile>::sanitize (hb_blob_reference (blob)), index);
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if (unlikely (!closure))
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return hb_face_get_empty ();
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face = hb_face_create_for_tables (_hb_face_for_data_reference_table,
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closure,
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(hb_destroy_func_t) _hb_face_for_data_closure_destroy);
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hb_face_set_index (face, index);
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return face;
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}
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/**
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* hb_face_get_empty:
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*
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*
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*
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* Return value: (transfer full)
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*
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* Since: 1.0
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**/
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hb_face_t *
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hb_face_get_empty (void)
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{
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return const_cast<hb_face_t *> (&_hb_face_nil);
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}
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/**
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* hb_face_reference: (skip)
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* @face: a face.
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*
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*
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*
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* Return value:
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*
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* Since: 1.0
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**/
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hb_face_t *
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hb_face_reference (hb_face_t *face)
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{
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return hb_object_reference (face);
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}
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/**
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* hb_face_destroy: (skip)
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* @face: a face.
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*
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*
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*
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* Since: 1.0
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**/
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void
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hb_face_destroy (hb_face_t *face)
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{
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if (!hb_object_destroy (face)) return;
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for (hb_face_t::plan_node_t *node = face->shape_plans; node; )
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{
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hb_face_t::plan_node_t *next = node->next;
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hb_shape_plan_destroy (node->shape_plan);
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free (node);
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node = next;
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}
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#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, face);
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#include "hb-shaper-list.hh"
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#undef HB_SHAPER_IMPLEMENT
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if (face->destroy)
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face->destroy (face->user_data);
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free (face);
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}
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/**
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* hb_face_set_user_data: (skip)
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* @face: a face.
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* @key:
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* @data:
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* @destroy:
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* @replace:
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*
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*
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*
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* Return value:
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*
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* Since: 1.0
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**/
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hb_bool_t
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hb_face_set_user_data (hb_face_t *face,
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hb_user_data_key_t *key,
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void * data,
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hb_destroy_func_t destroy,
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hb_bool_t replace)
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{
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return hb_object_set_user_data (face, key, data, destroy, replace);
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}
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/**
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* hb_face_get_user_data: (skip)
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* @face: a face.
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* @key:
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*
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*
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*
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* Return value: (transfer none):
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*
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* Since: 1.0
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**/
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void *
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hb_face_get_user_data (hb_face_t *face,
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hb_user_data_key_t *key)
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{
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return hb_object_get_user_data (face, key);
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}
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/**
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* hb_face_make_immutable:
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* @face: a face.
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*
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*
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*
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* Since: 1.0
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**/
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void
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hb_face_make_immutable (hb_face_t *face)
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{
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if (unlikely (hb_object_is_inert (face)))
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return;
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face->immutable = true;
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}
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/**
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* hb_face_is_immutable:
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* @face: a face.
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*
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*
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*
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* Return value:
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*
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* Since: 1.0
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**/
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hb_bool_t
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hb_face_is_immutable (hb_face_t *face)
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{
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return face->immutable;
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}
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/**
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* hb_face_reference_table:
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* @face: a face.
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* @tag:
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*
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*
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*
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* Return value: (transfer full):
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*
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* Since: 1.0
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**/
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hb_blob_t *
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hb_face_reference_table (hb_face_t *face,
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hb_tag_t tag)
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{
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return face->reference_table (tag);
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}
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/**
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* hb_face_reference_blob:
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* @face: a face.
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*
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*
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*
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* Return value: (transfer full):
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*
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* Since: 1.0
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**/
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hb_blob_t *
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hb_face_reference_blob (hb_face_t *face)
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{
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return face->reference_table (HB_TAG_NONE);
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}
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/**
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* hb_face_set_index:
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* @face: a face.
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* @index:
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*
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*
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*
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* Since: 1.0
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**/
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void
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hb_face_set_index (hb_face_t *face,
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unsigned int index)
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{
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if (face->immutable)
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return;
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face->index = index;
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}
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/**
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* hb_face_get_index:
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* @face: a face.
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*
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*
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*
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* Return value:
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*
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* Since: 1.0
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**/
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unsigned int
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hb_face_get_index (hb_face_t *face)
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{
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return face->index;
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}
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/**
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* hb_face_set_upem:
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* @face: a face.
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* @upem:
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*
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*
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*
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* Since: 1.0
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**/
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void
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hb_face_set_upem (hb_face_t *face,
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unsigned int upem)
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{
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if (face->immutable)
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return;
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face->upem = upem;
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}
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/**
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* hb_face_get_upem:
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* @face: a face.
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*
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*
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*
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* Return value:
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*
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* Since: 1.0
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**/
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unsigned int
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hb_face_get_upem (hb_face_t *face)
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{
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return face->get_upem ();
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}
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void
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hb_face_t::load_upem (void) const
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{
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hb_blob_t *head_blob = OT::Sanitizer<OT::head>::sanitize (reference_table (HB_OT_TAG_head));
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const OT::head *head_table = OT::Sanitizer<OT::head>::lock_instance (head_blob);
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upem = head_table->get_upem ();
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hb_blob_destroy (head_blob);
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}
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/**
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* hb_face_set_glyph_count:
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* @face: a face.
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* @glyph_count:
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*
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*
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*
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* Since: 1.0
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**/
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void
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hb_face_set_glyph_count (hb_face_t *face,
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unsigned int glyph_count)
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{
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if (face->immutable)
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return;
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face->num_glyphs = glyph_count;
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}
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/**
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* hb_face_get_glyph_count:
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* @face: a face.
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*
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*
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*
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* Return value:
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*
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* Since: 1.0
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**/
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unsigned int
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hb_face_get_glyph_count (hb_face_t *face)
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{
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return face->get_num_glyphs ();
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}
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void
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hb_face_t::load_num_glyphs (void) const
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{
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hb_blob_t *maxp_blob = OT::Sanitizer<OT::maxp>::sanitize (reference_table (HB_OT_TAG_maxp));
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const OT::maxp *maxp_table = OT::Sanitizer<OT::maxp>::lock_instance (maxp_blob);
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num_glyphs = maxp_table->get_num_glyphs ();
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hb_blob_destroy (maxp_blob);
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}
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