Edit
kc3-lang/harfbuzz/src/hb-subset-plan.hh
Qunxin Liu
- src/hb-subset-plan.hh
-
/* * Copyright © 2018 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. * * Google Author(s): Garret Rieger, Roderick Sheeter */ #ifndef HB_SUBSET_PLAN_HH #define HB_SUBSET_PLAN_HH #include "hb.hh" #include "hb-subset.h" #include "hb-subset-input.hh" #include "hb-map.hh" #include "hb-set.hh" struct hb_subset_plan_t { hb_object_header_t header; bool drop_hints : 1; bool drop_layout : 1; bool desubroutinize : 1; // For each cp that we'd like to retain maps to the corresponding gid. hb_set_t *unicodes; // The glyph subset hb_map_t *codepoint_to_glyph; // Old -> New glyph id mapping hb_map_t *glyph_map; hb_map_t *reverse_glyph_map; // Plan is only good for a specific source/dest so keep them with it hb_face_t *source; hb_face_t *dest; unsigned int _num_output_glyphs; hb_set_t *_glyphset; public: /* * The set of input glyph ids which will be retained in the subset. */ inline const hb_set_t * glyphset () const { return _glyphset; } /* * The total number of output glyphs in the final subset. */ inline unsigned int num_output_glyphs () const { return _num_output_glyphs; } /* * Given an output gid , returns true if that glyph id is an empty * glyph (ie. it's a gid that we are dropping all data for). */ inline bool is_empty_glyph (hb_codepoint_t gid) const { return !_glyphset->has (gid); } inline bool new_gid_for_codepoint (hb_codepoint_t codepoint, hb_codepoint_t *new_gid) const { hb_codepoint_t old_gid = codepoint_to_glyph->get (codepoint); if (old_gid == HB_MAP_VALUE_INVALID) return false; return new_gid_for_old_gid (old_gid, new_gid); } inline bool new_gid_for_old_gid (hb_codepoint_t old_gid, hb_codepoint_t *new_gid) const { hb_codepoint_t gid = glyph_map->get (old_gid); if (gid == HB_MAP_VALUE_INVALID) return false; *new_gid = gid; return true; } inline bool old_gid_for_new_gid (hb_codepoint_t new_gid, hb_codepoint_t *old_gid) const { hb_codepoint_t gid = reverse_glyph_map->get (new_gid); if (gid == HB_MAP_VALUE_INVALID) return false; *old_gid = gid; return true; } inline bool add_table (hb_tag_t tag, hb_blob_t *contents) { hb_blob_t *source_blob = source->reference_table (tag); DEBUG_MSG(SUBSET, nullptr, "add table %c%c%c%c, dest %d bytes, source %d bytes", HB_UNTAG(tag), hb_blob_get_length (contents), hb_blob_get_length (source_blob)); hb_blob_destroy (source_blob); return hb_face_builder_add_table (dest, tag, contents); } }; typedef struct hb_subset_plan_t hb_subset_plan_t; HB_INTERNAL hb_subset_plan_t * hb_subset_plan_create (hb_face_t *face, hb_subset_input_t *input); HB_INTERNAL void hb_subset_plan_destroy (hb_subset_plan_t *plan); #endif /* HB_SUBSET_PLAN_HH */