| /* |
| * 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-private.hh" |
| |
| #include "hb-face-private.hh" |
| #include "hb-open-file-private.hh" |
| #include "hb-ot-head-table.hh" |
| #include "hb-ot-maxp-table.hh" |
| |
| |
| /* |
| * hb_face_t |
| */ |
| |
| const hb_face_t _hb_face_nil = { |
| HB_OBJECT_HEADER_STATIC, |
| |
| true, /* immutable */ |
| |
| nullptr, /* reference_table_func */ |
| nullptr, /* user_data */ |
| nullptr, /* destroy */ |
| |
| 0, /* index */ |
| 1000, /* upem */ |
| 0, /* num_glyphs */ |
| |
| { |
| #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID, |
| #include "hb-shaper-list.hh" |
| #undef HB_SHAPER_IMPLEMENT |
| }, |
| |
| nullptr, /* shape_plans */ |
| }; |
| |
| |
| /** |
| * 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->upem = 0; |
| face->num_glyphs = (unsigned int) -1; |
| |
| 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 = *OT::Sanitizer<OT::OpenTypeFontFile>::lock_instance (data->blob); |
| const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index); |
| |
| const OT::OpenTypeTable &table = ot_face.get_table_by_tag (tag); |
| |
| hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, 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 (OT::Sanitizer<OT::OpenTypeFontFile>::sanitize (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 (void) |
| { |
| return const_cast<hb_face_t *> (&_hb_face_nil); |
| } |
| |
| |
| /** |
| * 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; |
| } |
| |
| #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, face); |
| #include "hb-shaper-list.hh" |
| #undef HB_SHAPER_IMPLEMENT |
| |
| 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 (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 (unlikely (hb_object_is_inert (face))) |
| return; |
| |
| face->immutable = true; |
| } |
| |
| /** |
| * hb_face_is_immutable: |
| * @face: a face. |
| * |
| * |
| * |
| * Return value: |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_bool_t |
| hb_face_is_immutable (hb_face_t *face) |
| { |
| return face->immutable; |
| } |
| |
| |
| /** |
| * hb_face_reference_table: |
| * @face: a face. |
| * @tag: |
| * |
| * |
| * |
| * Return value: (transfer full): |
| * |
| * Since: 0.9.2 |
| **/ |
| hb_blob_t * |
| hb_face_reference_table (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 (face->immutable) |
| return; |
| |
| face->index = index; |
| } |
| |
| /** |
| * hb_face_get_index: |
| * @face: a face. |
| * |
| * |
| * |
| * Return value: |
| * |
| * Since: 0.9.2 |
| **/ |
| unsigned int |
| hb_face_get_index (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 (face->immutable) |
| return; |
| |
| face->upem = upem; |
| } |
| |
| /** |
| * hb_face_get_upem: |
| * @face: a face. |
| * |
| * |
| * |
| * Return value: |
| * |
| * Since: 0.9.2 |
| **/ |
| unsigned int |
| hb_face_get_upem (hb_face_t *face) |
| { |
| return face->get_upem (); |
| } |
| |
| void |
| hb_face_t::load_upem (void) const |
| { |
| hb_blob_t *head_blob = OT::Sanitizer<OT::head>::sanitize (reference_table (HB_OT_TAG_head)); |
| const OT::head *head_table = OT::Sanitizer<OT::head>::lock_instance (head_blob); |
| upem = head_table->get_upem (); |
| hb_blob_destroy (head_blob); |
| } |
| |
| /** |
| * 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 (face->immutable) |
| return; |
| |
| face->num_glyphs = glyph_count; |
| } |
| |
| /** |
| * hb_face_get_glyph_count: |
| * @face: a face. |
| * |
| * |
| * |
| * Return value: |
| * |
| * Since: 0.9.7 |
| **/ |
| unsigned int |
| hb_face_get_glyph_count (hb_face_t *face) |
| { |
| return face->get_num_glyphs (); |
| } |
| |
| void |
| hb_face_t::load_num_glyphs (void) const |
| { |
| hb_blob_t *maxp_blob = OT::Sanitizer<OT::maxp>::sanitize (reference_table (HB_OT_TAG_maxp)); |
| const OT::maxp *maxp_table = OT::Sanitizer<OT::maxp>::lock_instance (maxp_blob); |
| num_glyphs = maxp_table->get_num_glyphs (); |
| hb_blob_destroy (maxp_blob); |
| } |
| |
| /** |
| * hb_face_get_table_tags: |
| * @face: a face. |
| * |
| * 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 (hb_face_t *face, |
| unsigned int start_offset, |
| unsigned int *table_count, /* IN/OUT */ |
| hb_tag_t *table_tags /* OUT */) |
| { |
| if (face->destroy != _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 = *OT::Sanitizer<OT::OpenTypeFontFile>::lock_instance (data->blob); |
| const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index); |
| |
| return ot_face.get_table_tags (start_offset, table_count, table_tags); |
| } |