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Diffstat (limited to '')
| -rw-r--r-- | gfx/harfbuzz/src/hb-subset-repacker.cc | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-subset-repacker.cc b/gfx/harfbuzz/src/hb-subset-repacker.cc new file mode 100644 index 0000000000..6a29b35be7 --- /dev/null +++ b/gfx/harfbuzz/src/hb-subset-repacker.cc @@ -0,0 +1,58 @@ +/* + * Copyright © 2022 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. + * + */ +#include "hb-repacker.hh" + +#ifdef HB_EXPERIMENTAL_API + +/** + * hb_subset_repack_or_fail: + * @table_tag: tag of the table being packed, needed to allow table specific optimizations. + * @hb_objects: raw array of struct hb_object_t, which provides + * object graph info + * @num_hb_objs: number of hb_object_t in the hb_objects array. + * + * Given the input object graph info, repack a table to eliminate + * offset overflows. A nullptr is returned if the repacking attempt fails. + * Table specific optimizations (eg. extension promotion in GSUB/GPOS) may be performed. + * Passing HB_TAG_NONE will disable table specific optimizations. + * + * XSince: EXPERIMENTAL + **/ +hb_blob_t* hb_subset_repack_or_fail (hb_tag_t table_tag, + hb_object_t* hb_objects, + unsigned num_hb_objs) +{ + hb_vector_t<const hb_object_t *> packed; + packed.alloc (num_hb_objs + 1); + packed.push (nullptr); + for (unsigned i = 0 ; i < num_hb_objs ; i++) + packed.push (&(hb_objects[i])); + + return hb_resolve_overflows (packed, + table_tag, + 20, + true); +} +#endif |