kc3-lang/harfbuzz/src/hb-aat-layout-lcar-table.hh

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• Hash : ef006549
  Author :
  Date : 2019-01-22T12:08:57
  

  Convert tag enum class consts to static constexpr
  
  Part of https://github.com/harfbuzz/harfbuzz/issues/1553
  

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• src/hb-aat-layout-lcar-table.hh

• /*
   * Copyright © 2018  Ebrahim Byagowi
   *
   *  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.
   */
  #ifndef HB_AAT_LAYOUT_LCAR_TABLE_HH
  #define HB_AAT_LAYOUT_LCAR_TABLE_HH
  
  #include "hb-open-type.hh"
  #include "hb-aat-layout-common.hh"
  
  /*
   * lcar -- Ligature caret
   * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6lcar.html
   */
  #define HB_AAT_TAG_lcar HB_TAG('l','c','a','r')
  
  
  namespace AAT {
  
  typedef ArrayOf<HBINT16> LigCaretClassEntry;
  
  struct lcar
  {
    static constexpr hb_tag_t tableTag = HB_AAT_TAG_lcar;
  
    unsigned int get_lig_carets (hb_font_t      *font,
  			       hb_direction_t  direction,
  			       hb_codepoint_t  glyph,
  			       unsigned int    start_offset,
  			       unsigned int   *caret_count /* IN/OUT */,
  			       hb_position_t  *caret_array /* OUT */) const
    {
      const OffsetTo<LigCaretClassEntry>* entry_offset = lookup.get_value (glyph,
  									 font->face->get_num_glyphs ());
      const LigCaretClassEntry& array = entry_offset ? this+*entry_offset : Null (LigCaretClassEntry);
      if (caret_count)
      {
        hb_array_t<const HBINT16> arr = array.sub_array (start_offset, caret_count);
        unsigned int count = arr.length;
        for (unsigned int i = 0; i < count; ++i)
  	switch (format)
  	{
  	case 0: caret_array[i] = font->em_scale_dir (arr[i], direction); break;
  	case 1:
  	  hb_position_t x, y;
  	  font->get_glyph_contour_point_for_origin (glyph, arr[i], direction, &x, &y);
  	  caret_array[i] = HB_DIRECTION_IS_HORIZONTAL (direction) ? x : y;
  	  break;
  	}
      }
      return array.len;
    }
  
    bool sanitize (hb_sanitize_context_t *c) const
    {
      TRACE_SANITIZE (this);
      return_trace (likely (c->check_struct (this) &&
  			  version.major == 1 &&
  			  lookup.sanitize (c, this)));
    }
  
    protected:
    FixedVersion<>version;	/* Version number of the ligature caret table */
    HBUINT16	format;		/* Format of the ligature caret table. */
    Lookup<OffsetTo<LigCaretClassEntry> >
  		lookup;		/* data Lookup table associating glyphs */
  
    public:
    DEFINE_SIZE_MIN (8);
  };
  
  } /* namespace AAT */
  
  #endif /* HB_AAT_LAYOUT_LCAR_TABLE_HH */
  

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