2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2012 Google, Inc.
5 * This is part of HarfBuzz, a text shaping library.
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod
29 #include "hb-private.hh"
31 #include "hb-ot-layout-private.hh"
33 #include "hb-font-private.hh"
34 #include "hb-open-file-private.hh"
35 #include "hb-ot-head-table.hh"
36 #include "hb-ot-maxp-table.hh"
38 #include "hb-cache-private.hh"
47 const hb_face_t _hb_face_nil = {
48 HB_OBJECT_HEADER_STATIC,
52 NULL, /* reference_table_func */
61 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
62 #include "hb-shaper-list.hh"
63 #undef HB_SHAPER_IMPLEMENT
66 NULL, /* shape_plans */
71 * hb_face_create_for_tables:
72 * @reference_table_func: (closure user_data) (destroy destroy) (scope notified):
78 * Return value: (transfer full)
83 hb_face_create_for_tables (hb_reference_table_func_t reference_table_func,
85 hb_destroy_func_t destroy)
89 if (!reference_table_func || !(face = hb_object_create<hb_face_t> ())) {
92 return hb_face_get_empty ();
95 face->reference_table_func = reference_table_func;
96 face->user_data = user_data;
97 face->destroy = destroy;
100 face->num_glyphs = (unsigned int) -1;
106 typedef struct hb_face_for_data_closure_t {
109 } hb_face_for_data_closure_t;
111 static hb_face_for_data_closure_t *
112 _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
114 hb_face_for_data_closure_t *closure;
116 closure = (hb_face_for_data_closure_t *) calloc (1, sizeof (hb_face_for_data_closure_t));
117 if (unlikely (!closure))
120 closure->blob = blob;
121 closure->index = index;
127 _hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
129 hb_blob_destroy (closure->blob);
134 _hb_face_for_data_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
136 hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;
138 if (tag == HB_TAG_NONE)
139 return hb_blob_reference (data->blob);
141 const OT::OpenTypeFontFile &ot_file = *OT::Sanitizer<OT::OpenTypeFontFile>::lock_instance (data->blob);
142 const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
144 const OT::OpenTypeTable &table = ot_face.get_table_by_tag (tag);
146 hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);
152 * hb_face_create: (Xconstructor)
158 * Return value: (transfer full):
163 hb_face_create (hb_blob_t *blob,
168 if (unlikely (!blob))
169 blob = hb_blob_get_empty ();
171 hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (OT::Sanitizer<OT::OpenTypeFontFile>::sanitize (hb_blob_reference (blob)), index);
173 if (unlikely (!closure))
174 return hb_face_get_empty ();
176 face = hb_face_create_for_tables (_hb_face_for_data_reference_table,
178 (hb_destroy_func_t) _hb_face_for_data_closure_destroy);
180 hb_face_set_index (face, index);
190 * Return value: (transfer full)
195 hb_face_get_empty (void)
197 return const_cast<hb_face_t *> (&_hb_face_nil);
202 * hb_face_reference: (skip)
212 hb_face_reference (hb_face_t *face)
214 return hb_object_reference (face);
218 * hb_face_destroy: (skip)
226 hb_face_destroy (hb_face_t *face)
228 if (!hb_object_destroy (face)) return;
230 for (hb_face_t::plan_node_t *node = face->shape_plans; node; )
232 hb_face_t::plan_node_t *next = node->next;
233 hb_shape_plan_destroy (node->shape_plan);
238 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, face);
239 #include "hb-shaper-list.hh"
240 #undef HB_SHAPER_IMPLEMENT
243 face->destroy (face->user_data);
249 * hb_face_set_user_data: (skip)
263 hb_face_set_user_data (hb_face_t *face,
264 hb_user_data_key_t *key,
266 hb_destroy_func_t destroy,
269 return hb_object_set_user_data (face, key, data, destroy, replace);
273 * hb_face_get_user_data: (skip)
279 * Return value: (transfer none):
284 hb_face_get_user_data (hb_face_t *face,
285 hb_user_data_key_t *key)
287 return hb_object_get_user_data (face, key);
291 * hb_face_make_immutable:
299 hb_face_make_immutable (hb_face_t *face)
301 if (unlikely (hb_object_is_inert (face)))
304 face->immutable = true;
308 * hb_face_is_immutable:
318 hb_face_is_immutable (hb_face_t *face)
320 return face->immutable;
325 * hb_face_reference_table:
331 * Return value: (transfer full):
336 hb_face_reference_table (hb_face_t *face,
339 return face->reference_table (tag);
343 * hb_face_reference_blob:
348 * Return value: (transfer full):
353 hb_face_reference_blob (hb_face_t *face)
355 return face->reference_table (HB_TAG_NONE);
368 hb_face_set_index (hb_face_t *face,
388 hb_face_get_index (hb_face_t *face)
403 hb_face_set_upem (hb_face_t *face,
423 hb_face_get_upem (hb_face_t *face)
425 return face->get_upem ();
429 hb_face_t::load_upem (void) const
431 hb_blob_t *head_blob = OT::Sanitizer<OT::head>::sanitize (reference_table (HB_OT_TAG_head));
432 const OT::head *head_table = OT::Sanitizer<OT::head>::lock_instance (head_blob);
433 upem = head_table->get_upem ();
434 hb_blob_destroy (head_blob);
438 * hb_face_set_glyph_count:
447 hb_face_set_glyph_count (hb_face_t *face,
448 unsigned int glyph_count)
453 face->num_glyphs = glyph_count;
457 * hb_face_get_glyph_count:
467 hb_face_get_glyph_count (hb_face_t *face)
469 return face->get_num_glyphs ();
473 hb_face_t::load_num_glyphs (void) const
475 hb_blob_t *maxp_blob = OT::Sanitizer<OT::maxp>::sanitize (reference_table (HB_OT_TAG_maxp));
476 const OT::maxp *maxp_table = OT::Sanitizer<OT::maxp>::lock_instance (maxp_blob);
477 num_glyphs = maxp_table->get_num_glyphs ();
478 hb_blob_destroy (maxp_blob);