kc3-lang/harfbuzz/src/hb-aat-layout.cc

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• Hash : f07ce661
  Author :
  Date : 2018-01-19T16:52:01
  

  [aat] Embed a sanitizer context in hb_aat_apply_context_t
  
  For run-time checking.
  

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• src/hb-aat-layout.cc

• /*
   * Copyright © 2017  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): Behdad Esfahbod
   */
  
  #include "hb-open-type-private.hh"
  
  #include "hb-ot-layout-private.hh"
  #include "hb-ot-layout-gsubgpos-private.hh"
  
  #include "hb-aat-layout-private.hh"
  #include "hb-aat-layout-morx-table.hh"
  
  /*
   * mort/morx
   */
  
  static inline const AAT::morx&
  _get_morx (hb_face_t *face, hb_blob_t **blob = nullptr)
  {
    if (unlikely (!hb_ot_shaper_face_data_ensure (face)))
    {
      if (blob)
        *blob = hb_blob_get_empty ();
      return OT::Null(AAT::morx);
    }
    hb_ot_layout_t * layout = hb_ot_layout_from_face (face);
    /* XXX this doesn't call set_num_glyphs on sanitizer. */
    const AAT::morx& morx = *(layout->morx.get ());
    if (blob)
      *blob = layout->morx.blob;
    return morx;
  }
  
  static inline void
  _hb_aat_layout_create (hb_face_t *face)
  {
    OT::Sanitizer<AAT::morx> sanitizer;
    sanitizer.set_num_glyphs (face->get_num_glyphs ());
    hb_blob_t *morx_blob = sanitizer.sanitize (face->reference_table (HB_AAT_TAG_MORX));
    OT::Sanitizer<AAT::morx>::lock_instance (morx_blob);
  
    if (0)
    {
      OT::Sanitizer<AAT::Lookup<OT::GlyphID> >::lock_instance (morx_blob)->get_value (1, face->get_num_glyphs ());
    }
  }
  
  void
  hb_aat_layout_substitute (hb_font_t *font, hb_buffer_t *buffer)
  {
    hb_blob_t *blob;
    const AAT::morx& morx = _get_morx (font->face, &blob);
  
    AAT::hb_aat_apply_context_t c (font, buffer, blob);
    morx.apply (&c);
  }
  

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