initial commit, 4.5 stable

thirdparty/harfbuzz/src/OT/Layout/GPOS/SinglePos.hh

@@ -0,0 +1,98 @@
+#ifndef OT_LAYOUT_GPOS_SINGLEPOS_HH
+#define OT_LAYOUT_GPOS_SINGLEPOS_HH
+
+#include "SinglePosFormat1.hh"
+#include "SinglePosFormat2.hh"
+
+namespace OT {
+namespace Layout {
+namespace GPOS_impl {
+
+struct SinglePos
+{
+  protected:
+  union {
+  HBUINT16              format;         /* Format identifier */
+  SinglePosFormat1      format1;
+  SinglePosFormat2      format2;
+  } u;
+
+  public:
+  template<typename Iterator,
+           hb_requires (hb_is_iterator (Iterator))>
+  unsigned get_format (Iterator glyph_val_iter_pairs)
+  {
+    hb_array_t<const Value> first_val_iter = hb_second (*glyph_val_iter_pairs);
+
+    for (const auto iter : glyph_val_iter_pairs)
+      for (const auto _ : hb_zip (iter.second, first_val_iter))
+        if (_.first != _.second)
+          return 2;
+
+    return 1;
+  }
+
+  template<typename Iterator,
+      typename SrcLookup,
+      hb_requires (hb_is_iterator (Iterator))>
+  void serialize (hb_serialize_context_t *c,
+                  const SrcLookup* src,
+                  Iterator glyph_val_iter_pairs,
+                  const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map,
+                  unsigned newFormat)
+  {
+    if (unlikely (!c->extend_min (u.format))) return;
+    unsigned format = 2;
+    ValueFormat new_format;
+    new_format = newFormat;
+
+    if (glyph_val_iter_pairs)
+      format = get_format (glyph_val_iter_pairs);
+
+    u.format = format;
+    switch (u.format) {
+    case 1: u.format1.serialize (c,
+                                 src,
+                                 glyph_val_iter_pairs,
+                                 new_format,
+                                 layout_variation_idx_delta_map);
+      return;
+    case 2: u.format2.serialize (c,
+                                 src,
+                                 glyph_val_iter_pairs,
+                                 new_format,
+                                 layout_variation_idx_delta_map);
+      return;
+    default:return;
+    }
+  }
+
+  template <typename context_t, typename ...Ts>
+  typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
+  {
+    if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value ();
+    TRACE_DISPATCH (this, u.format);
+    switch (u.format) {
+    case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...));
+    case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
+    default:return_trace (c->default_return_value ());
+    }
+  }
+};
+
+
+template<typename Iterator, typename SrcLookup>
+static void
+SinglePos_serialize (hb_serialize_context_t *c,
+                     const SrcLookup *src,
+                     Iterator it,
+                     const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map,
+                     unsigned new_format)
+{ c->start_embed<SinglePos> ()->serialize (c, src, it, layout_variation_idx_delta_map, new_format); }
+
+
+}
+}
+}
+
+#endif /* OT_LAYOUT_GPOS_SINGLEPOS_HH */