137 lines
3.6 KiB
C++
137 lines
3.6 KiB
C++
/*
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* Copyright © 2018 Adobe Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Adobe Author(s): Michiharu Ariza
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*/
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#ifndef HB_OT_VORG_TABLE_HH
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#define HB_OT_VORG_TABLE_HH
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#include "hb-open-type.hh"
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/*
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* VORG -- Vertical Origin Table
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* https://docs.microsoft.com/en-us/typography/opentype/spec/vorg
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*/
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#define HB_OT_TAG_VORG HB_TAG('V','O','R','G')
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namespace OT {
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struct VertOriginMetric
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{
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int cmp (hb_codepoint_t g) const { return glyph.cmp (g); }
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bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this));
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}
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public:
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HBGlyphID16 glyph;
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FWORD vertOriginY;
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public:
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DEFINE_SIZE_STATIC (4);
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};
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struct VORG
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{
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static constexpr hb_tag_t tableTag = HB_OT_TAG_VORG;
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bool has_data () const { return version.to_int (); }
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int get_y_origin (hb_codepoint_t glyph) const
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{
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unsigned int i;
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if (!vertYOrigins.bfind (glyph, &i))
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return defaultVertOriginY;
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return vertYOrigins[i].vertOriginY;
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}
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template <typename Iterator,
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hb_requires (hb_is_iterator (Iterator))>
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void serialize (hb_serialize_context_t *c,
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Iterator it,
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FWORD defaultVertOriginY)
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{
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if (unlikely (!c->extend_min ((*this)))) return;
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this->version.major = 1;
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this->version.minor = 0;
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this->defaultVertOriginY = defaultVertOriginY;
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this->vertYOrigins.len = it.len ();
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c->copy_all (it);
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}
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bool subset (hb_subset_context_t *c) const
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{
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TRACE_SUBSET (this);
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VORG *vorg_prime = c->serializer->start_embed<VORG> ();
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if (unlikely (!c->serializer->check_success (vorg_prime))) return_trace (false);
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auto it =
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+ vertYOrigins.as_array ()
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| hb_filter (c->plan->glyphset (), &VertOriginMetric::glyph)
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| hb_map ([&] (const VertOriginMetric& _)
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{
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hb_codepoint_t new_glyph = HB_SET_VALUE_INVALID;
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c->plan->new_gid_for_old_gid (_.glyph, &new_glyph);
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VertOriginMetric metric;
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metric.glyph = new_glyph;
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metric.vertOriginY = _.vertOriginY;
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return metric;
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})
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;
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/* serialize the new table */
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vorg_prime->serialize (c->serializer, it, defaultVertOriginY);
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return_trace (true);
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}
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bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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version.major == 1 &&
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vertYOrigins.sanitize (c));
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}
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protected:
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FixedVersion<>version; /* Version of VORG table. Set to 0x00010000u. */
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FWORD defaultVertOriginY;
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/* The default vertical origin. */
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SortedArray16Of<VertOriginMetric>
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vertYOrigins; /* The array of vertical origins. */
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public:
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DEFINE_SIZE_ARRAY(8, vertYOrigins);
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};
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} /* namespace OT */
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#endif /* HB_OT_VORG_TABLE_HH */
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