1 files changed, 136 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-ot-vorg-table.hh b/gfx/harfbuzz/src/hb-ot-vorg-table.hh
new file mode 100644
index 0000000000..811e13919e
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-ot-vorg-table.hh
@@ -0,0 +1,136 @@
+/*
+ * Copyright © 2018 Adobe 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.
+ *
+ * Adobe Author(s): Michiharu Ariza
+ */
+
+#ifndef HB_OT_VORG_TABLE_HH
+#define HB_OT_VORG_TABLE_HH
+
+#include "hb-open-type.hh"
+
+/*
+ * VORG -- Vertical Origin Table
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/vorg
+ */
+#define HB_OT_TAG_VORG HB_TAG('V','O','R','G')
+
+namespace OT {
+
+struct VertOriginMetric
+{
+  int cmp (hb_codepoint_t g) const { return glyph.cmp (g); }
+
+  bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (c->check_struct (this));
+  }
+
+  public:
+  HBGlyphID16	glyph;
+  FWORD		vertOriginY;
+
+  public:
+  DEFINE_SIZE_STATIC (4);
+};
+
+struct VORG
+{
+  static constexpr hb_tag_t tableTag = HB_OT_TAG_VORG;
+
+  bool has_data () const { return version.to_int (); }
+
+  int get_y_origin (hb_codepoint_t glyph) const
+  {
+    unsigned int i;
+    if (!vertYOrigins.bfind (glyph, &i))
+      return defaultVertOriginY;
+    return vertYOrigins[i].vertOriginY;
+  }
+
+  template <typename Iterator,
+	    hb_requires (hb_is_iterator (Iterator))>
+  void serialize (hb_serialize_context_t *c,
+		  Iterator it,
+		  FWORD defaultVertOriginY)
+  {
+
+    if (unlikely (!c->extend_min ((*this))))  return;
+
+    this->version.major = 1;
+    this->version.minor = 0;
+
+    this->defaultVertOriginY = defaultVertOriginY;
+    this->vertYOrigins.len = it.len ();
+
+    c->copy_all (it);
+  }
+
+  bool subset (hb_subset_context_t *c) const
+  {
+    TRACE_SUBSET (this);
+    VORG *vorg_prime = c->serializer->start_embed<VORG> ();
+    if (unlikely (!c->serializer->check_success (vorg_prime))) return_trace (false);
+
+    auto it =
+    + vertYOrigins.as_array ()
+    | hb_filter (c->plan->glyphset (), &VertOriginMetric::glyph)
+    | hb_map ([&] (const VertOriginMetric& _)
+	      {
+		hb_codepoint_t new_glyph = HB_SET_VALUE_INVALID;
+		c->plan->new_gid_for_old_gid (_.glyph, &new_glyph);
+
+		VertOriginMetric metric;
+		metric.glyph = new_glyph;
+		metric.vertOriginY = _.vertOriginY;
+		return metric;
+	      })
+    ;
+
+    /* serialize the new table */
+    vorg_prime->serialize (c->serializer, it, defaultVertOriginY);
+    return_trace (true);
+  }
+
+  bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (c->check_struct (this) &&
+		  version.major == 1 &&
+		  vertYOrigins.sanitize (c));
+  }
+
+  protected:
+  FixedVersion<>version;	/* Version of VORG table. Set to 0x00010000u. */
+  FWORD		defaultVertOriginY;
+				/* The default vertical origin. */
+  SortedArray16Of<VertOriginMetric>
+		vertYOrigins;	/* The array of vertical origins. */
+
+  public:
+  DEFINE_SIZE_ARRAY(8, vertYOrigins);
+};
+} /* namespace OT */
+
+#endif /* HB_OT_VORG_TABLE_HH */