kc3-lang/harfbuzz/src/hb-ot-maxp-table.hh

Branch - branch -main

• Show log

  Commit

• Hash : 7ee7e2e3
  Author :
  Date : 2023-11-04T15:02:28
  

  [sanitize] Add remaining hb_barrier() annotations
  
  I'm sure I've forgot some. But this is a good start.
  

Download

• src/hb-ot-maxp-table.hh

• /*
   * Copyright © 2011,2012  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
   */
  
  #ifndef HB_OT_MAXP_TABLE_HH
  #define HB_OT_MAXP_TABLE_HH
  
  #include "hb-open-type.hh"
  
  namespace OT {
  
  
  /*
   * maxp -- Maximum Profile
   * https://docs.microsoft.com/en-us/typography/opentype/spec/maxp
   */
  
  #define HB_OT_TAG_maxp HB_TAG('m','a','x','p')
  
  struct maxpV1Tail
  {
    bool sanitize (hb_sanitize_context_t *c) const
    {
      TRACE_SANITIZE (this);
      return_trace (c->check_struct (this));
    }
  
    HBUINT16 maxPoints;		  /* Maximum points in a non-composite glyph. */
    HBUINT16 maxContours;		  /* Maximum contours in a non-composite glyph. */
    HBUINT16 maxCompositePoints;	  /* Maximum points in a composite glyph. */
    HBUINT16 maxCompositeContours;  /* Maximum contours in a composite glyph. */
    HBUINT16 maxZones;		  /* 1 if instructions do not use the twilight zone (Z0),
  				   * or 2 if instructions do use Z0; should be set to 2 in
  				   * most cases. */
    HBUINT16 maxTwilightPoints;	  /* Maximum points used in Z0. */
    HBUINT16 maxStorage;		  /* Number of Storage Area locations. */
    HBUINT16 maxFunctionDefs;	  /* Number of FDEFs, equal to the highest function number + 1. */
    HBUINT16 maxInstructionDefs;	  /* Number of IDEFs. */
    HBUINT16 maxStackElements;	  /* Maximum stack depth. (This includes Font and CVT
  				   * Programs, as well as the instructions for each glyph.) */
    HBUINT16 maxSizeOfInstructions; /* Maximum byte count for glyph instructions. */
    HBUINT16 maxComponentElements;  /* Maximum number of components referenced at
  				   * "top level" for any composite glyph. */
    HBUINT16 maxComponentDepth;	  /* Maximum levels of recursion; 1 for simple components. */
   public:
    DEFINE_SIZE_STATIC (26);
  };
  
  
  struct maxp
  {
    static constexpr hb_tag_t tableTag = HB_OT_TAG_maxp;
  
    unsigned int get_num_glyphs () const { return numGlyphs; }
  
    void set_num_glyphs (unsigned int count)
    {
      numGlyphs = count;
    }
  
    bool sanitize (hb_sanitize_context_t *c) const
    {
      TRACE_SANITIZE (this);
      if (unlikely (!c->check_struct (this)))
        return_trace (false);
      hb_barrier ();
      if (version.major == 1)
      {
        const maxpV1Tail &v1 = StructAfter<maxpV1Tail> (*this);
        return_trace (v1.sanitize (c));
      }
      return_trace (likely (version.major == 0 && version.minor == 0x5000u));
    }
  
    bool subset (hb_subset_context_t *c) const
    {
      TRACE_SUBSET (this);
      maxp *maxp_prime = c->serializer->embed (this);
      if (unlikely (!maxp_prime)) return_trace (false);
  
      maxp_prime->numGlyphs = hb_min (c->plan->num_output_glyphs (), 0xFFFFu);
      if (maxp_prime->version.major == 1)
      {
        hb_barrier ();
        const maxpV1Tail *src_v1 = &StructAfter<maxpV1Tail> (*this);
        maxpV1Tail *dest_v1 = c->serializer->embed<maxpV1Tail> (src_v1);
        if (unlikely (!dest_v1)) return_trace (false);
  
        if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
  	drop_hint_fields (dest_v1);
  
        if (c->plan->normalized_coords)
          instancing_update_fields (c->plan->head_maxp_info, dest_v1);
      }
  
      return_trace (true);
    }
  
    void instancing_update_fields (head_maxp_info_t& maxp_info, maxpV1Tail* dest_v1) const
    {
      dest_v1->maxPoints = maxp_info.maxPoints;
      dest_v1->maxContours = maxp_info.maxContours;
      dest_v1->maxCompositePoints = maxp_info.maxCompositePoints;
      dest_v1->maxCompositeContours = maxp_info.maxCompositeContours;
      dest_v1->maxComponentElements = maxp_info.maxComponentElements;
      dest_v1->maxComponentDepth = maxp_info.maxComponentDepth;
    }
  
    static void drop_hint_fields (maxpV1Tail* dest_v1)
    {
      dest_v1->maxZones = 1;
      dest_v1->maxTwilightPoints = 0;
      dest_v1->maxStorage = 0;
      dest_v1->maxFunctionDefs = 0;
      dest_v1->maxInstructionDefs = 0;
      dest_v1->maxStackElements = 0;
      dest_v1->maxSizeOfInstructions = 0;
    }
  
    protected:
    FixedVersion<>version;/* Version of the maxp table (0.5 or 1.0),
  			 * 0x00005000u or 0x00010000u. */
    HBUINT16	numGlyphs;
  			/* The number of glyphs in the font. */
  /*maxpV1Tail	v1Tail[HB_VAR_ARRAY]; */
    public:
    DEFINE_SIZE_STATIC (6);
  };
  
  
  } /* namespace OT */
  
  
  #endif /* HB_OT_MAXP_TABLE_HH */
  

Download