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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:
HBGlyphID 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. */
SortedArrayOf<VertOriginMetric>
vertYOrigins; /* The array of vertical origins. */
public:
DEFINE_SIZE_ARRAY(8, vertYOrigins);
};
} /* namespace OT */
#endif /* HB_OT_VORG_TABLE_HH */
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