kc3-lang/harfbuzz/src/OT/Layout/GPOS/Anchor.hh

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• Hash : 3a9262cc
  Author :
  Date : 2023-11-04T12:52:46
  

  [sanitize] More hb_barrier() annotations
  

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• src/OT/Layout/GPOS/Anchor.hh

• #ifndef OT_LAYOUT_GPOS_ANCHOR_HH
  #define OT_LAYOUT_GPOS_ANCHOR_HH
  
  #include "AnchorFormat1.hh"
  #include "AnchorFormat2.hh"
  #include "AnchorFormat3.hh"
  
  namespace OT {
  namespace Layout {
  namespace GPOS_impl {
  
  struct Anchor
  {
    protected:
    union {
    HBUINT16              format;         /* Format identifier */
    AnchorFormat1         format1;
    AnchorFormat2         format2;
    AnchorFormat3         format3;
    } u;
    public:
    DEFINE_SIZE_UNION (2, format);
  
    bool sanitize (hb_sanitize_context_t *c) const
    {
      TRACE_SANITIZE (this);
      if (!u.format.sanitize (c)) return_trace (false);
      hb_barrier ();
      switch (u.format) {
      case 1: return_trace (u.format1.sanitize (c));
      case 2: return_trace (u.format2.sanitize (c));
      case 3: return_trace (u.format3.sanitize (c));
      default:return_trace (true);
      }
    }
  
    void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id,
                     float *x, float *y) const
    {
      *x = *y = 0;
      switch (u.format) {
      case 1: u.format1.get_anchor (c, glyph_id, x, y); return;
      case 2: u.format2.get_anchor (c, glyph_id, x, y); return;
      case 3: u.format3.get_anchor (c, glyph_id, x, y); return;
      default:                                          return;
      }
    }
  
    bool subset (hb_subset_context_t *c) const
    {
      TRACE_SUBSET (this);
      switch (u.format) {
      case 1: return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer))));
      case 2:
        if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
        {
          // AnchorFormat 2 just containins extra hinting information, so
          // if hints are being dropped convert to format 1.
          return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer))));
        }
        return_trace (bool (reinterpret_cast<Anchor *> (u.format2.copy (c->serializer))));
      case 3: return_trace (u.format3.subset (c));
      default:return_trace (false);
      }
    }
  
    void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
    {
      switch (u.format) {
      case 1: case 2:
        return;
      case 3:
        u.format3.collect_variation_indices (c);
        return;
      default: return;
      }
    }
  };
  
  }
  }
  }
  
  #endif  // OT_LAYOUT_GPOS_ANCHOR_HH
  

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