kc3-lang/harfbuzz/src/hb-subset-plan.hh

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• Hash : 3f00d0b0
  Author :
  Date : 2018-09-03T18:54:32
  

  [subset] Keep glyph set in plan
  
  Should remove the vector version at some point...
  

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• 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"
  
  struct hb_subset_plan_t
  {
    hb_object_header_t header;
    ASSERT_POD ();
  
    bool drop_hints : 1;
    bool drop_layout : 1;
  
    // For each cp that we'd like to retain maps to the corresponding gid.
    hb_set_t *unicodes;
  
    hb_vector_t<hb_codepoint_t> glyphs;
    hb_set_t *glyphset;
  
    hb_map_t *codepoint_to_glyph;
    hb_map_t *glyph_map;
  
    // Plan is only good for a specific source/dest so keep them with it
    hb_face_t *source;
    hb_face_t *dest;
  
    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
    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 */
  

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