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+/*
+ * 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 */