From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- gfx/harfbuzz/src/hb-face-builder.cc | 246 ++++++++++++++++++++++++++++++++++++ 1 file changed, 246 insertions(+) create mode 100644 gfx/harfbuzz/src/hb-face-builder.cc (limited to 'gfx/harfbuzz/src/hb-face-builder.cc') diff --git a/gfx/harfbuzz/src/hb-face-builder.cc b/gfx/harfbuzz/src/hb-face-builder.cc new file mode 100644 index 0000000000..84b14d28d6 --- /dev/null +++ b/gfx/harfbuzz/src/hb-face-builder.cc @@ -0,0 +1,246 @@ +/* + * 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-map.hh" +#include "hb-open-file.hh" +#include "hb-serialize.hh" + + +/* + * face-builder: A face that has add_table(). + */ + +struct face_table_info_t +{ + hb_blob_t* data; + signed order; +}; + +struct hb_face_builder_data_t +{ + hb_hashmap_t tables; +}; + +static int compare_entries (const void* pa, const void* pb) +{ + const auto& a = * (const hb_pair_t *) pa; + const auto& b = * (const hb_pair_t *) pb; + + /* Order by blob size first (smallest to largest) and then table tag */ + + if (a.second.order != b.second.order) + return a.second.order < b.second.order ? -1 : +1; + + if (a.second.data->length != b.second.data->length) + return a.second.data->length < b.second.data->length ? -1 : +1; + + return a.first < b.first ? -1 : a.first == b.first ? 0 : +1; +} + +static hb_face_builder_data_t * +_hb_face_builder_data_create () +{ + hb_face_builder_data_t *data = (hb_face_builder_data_t *) hb_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 (auto info : data->tables.values()) + hb_blob_destroy (info.data); + + data->tables.fini (); + + hb_free (data); +} + +static hb_blob_t * +_hb_face_builder_data_reference_blob (hb_face_builder_data_t *data) +{ + + unsigned int table_count = data->tables.get_population (); + unsigned int face_length = table_count * 16 + 12; + + for (auto info : data->tables.values()) + face_length += hb_ceil_to_4 (hb_blob_get_length (info.data)); + + char *buf = (char *) hb_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 (); + + bool is_cff = (data->tables.has (HB_TAG ('C','F','F',' ')) + || data->tables.has (HB_TAG ('C','F','F','2'))); + hb_tag_t sfnt_tag = is_cff ? OT::OpenTypeFontFile::CFFTag : OT::OpenTypeFontFile::TrueTypeTag; + + // Sort the tags so that produced face is deterministic. + hb_vector_t> sorted_entries; + data->tables.iter () | hb_sink (sorted_entries); + if (unlikely (sorted_entries.in_error ())) + { + hb_free (buf); + return nullptr; + } + + sorted_entries.qsort (compare_entries); + + bool ret = f->serialize_single (&c, + sfnt_tag, + + sorted_entries.iter() + | hb_map ([&] (hb_pair_t _) { + return hb_pair_t (_.first, _.second.data); + })); + + c.end_serialize (); + + if (unlikely (!ret)) + { + hb_free (buf); + return nullptr; + } + + return hb_blob_create (buf, face_length, HB_MEMORY_MODE_WRITABLE, buf, hb_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); + + return hb_blob_reference (data->tables[tag].data); +} + + +/** + * 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: + * @face: A face object created with hb_face_builder_create() + * @tag: The #hb_tag_t of the table to add + * @blob: The blob containing the table data to add + * + * 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; + + if (tag == HB_MAP_VALUE_INVALID) + return false; + + hb_face_builder_data_t *data = (hb_face_builder_data_t *) face->user_data; + + hb_blob_t* previous = data->tables.get (tag).data; + if (!data->tables.set (tag, face_table_info_t {hb_blob_reference (blob), -1})) + { + hb_blob_destroy (blob); + return false; + } + + hb_blob_destroy (previous); + return true; +} + +/** + * hb_face_builder_sort_tables: + * @face: A face object created with hb_face_builder_create() + * @tags: (array zero-terminated=1): ordered list of table tags terminated by + * %HB_TAG_NONE + * + * Set the ordering of tables for serialization. Any tables not + * specified in the tags list will be ordered after the tables in + * tags, ordered by the default sort ordering. + * + * Since: 5.3.0 + **/ +void +hb_face_builder_sort_tables (hb_face_t *face, + const hb_tag_t *tags) +{ + if (unlikely (face->destroy != (hb_destroy_func_t) _hb_face_builder_data_destroy)) + return; + + hb_face_builder_data_t *data = (hb_face_builder_data_t *) face->user_data; + + // Sort all unspecified tables after any specified tables. + for (auto& info : data->tables.values_ref()) + info.order = (unsigned) -1; + + signed order = 0; + for (const hb_tag_t* tag = tags; + *tag; + tag++) + { + face_table_info_t* info; + if (!data->tables.has (*tag, &info)) continue; + info->order = order++; + } +} -- cgit v1.2.3