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/*
* Copyright © 2021 Google, 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.
*
*/
#ifndef HB_OT_POST_TABLE_V2SUBSET_HH
#define HB_OT_POST_TABLE_V2SUBSET_HH
#include "hb-open-type.hh"
#include "hb-ot-post-table.hh"
/*
* post -- PostScript
* https://docs.microsoft.com/en-us/typography/opentype/spec/post
*/
namespace OT {
template<typename Iterator>
HB_INTERNAL bool postV2Tail::serialize (hb_serialize_context_t *c,
Iterator it,
const void* _post) const
{
TRACE_SERIALIZE (this);
auto *out = c->start_embed (this);
if (unlikely (!c->check_success (out))) return_trace (false);
if (!out->glyphNameIndex.serialize (c, + it
| hb_map (hb_second)))
return_trace (false);
hb_set_t copied_indices;
for (const auto& _ : + it )
{
unsigned glyph_id = _.first;
unsigned new_index = _.second;
if (new_index < 258) continue;
if (copied_indices.has (new_index)) continue;
copied_indices.add (new_index);
hb_bytes_t s = reinterpret_cast<const post::accelerator_t*> (_post)->find_glyph_name (glyph_id);
HBUINT8 *o = c->allocate_size<HBUINT8> (HBUINT8::static_size * (s.length + 1));
if (unlikely (!o)) return_trace (false);
if (!c->check_assign (o[0], s.length, HB_SERIALIZE_ERROR_INT_OVERFLOW)) return_trace (false);
hb_memcpy (o+1, s.arrayZ, HBUINT8::static_size * s.length);
}
return_trace (true);
}
HB_INTERNAL bool postV2Tail::subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
const hb_map_t &reverse_glyph_map = *c->plan->reverse_glyph_map;
unsigned num_glyphs = c->plan->num_output_glyphs ();
hb_map_t old_new_index_map, old_gid_new_index_map;
unsigned i = 0;
post::accelerator_t _post (c->plan->source);
hb_hashmap_t<hb_bytes_t, uint32_t, true> glyph_name_to_new_index;
for (hb_codepoint_t new_gid = 0; new_gid < num_glyphs; new_gid++)
{
hb_codepoint_t old_gid = reverse_glyph_map.get (new_gid);
unsigned old_index = glyphNameIndex[old_gid];
unsigned new_index;
const uint32_t *new_index2;
if (old_index <= 257) new_index = old_index;
else if (old_new_index_map.has (old_index, &new_index2))
{
new_index = *new_index2;
} else {
hb_bytes_t s = _post.find_glyph_name (old_gid);
new_index = glyph_name_to_new_index.get (s);
if (new_index == (unsigned)-1)
{
int standard_glyph_index = -1;
for (unsigned i = 0; i < format1_names_length; i++)
{
if (s == format1_names (i))
{
standard_glyph_index = i;
break;
}
}
if (standard_glyph_index == -1)
{
new_index = 258 + i;
i++;
}
else
{ new_index = standard_glyph_index; }
glyph_name_to_new_index.set (s, new_index);
}
old_new_index_map.set (old_index, new_index);
}
old_gid_new_index_map.set (old_gid, new_index);
}
auto index_iter =
+ hb_range (num_glyphs)
| hb_map (reverse_glyph_map)
| hb_map_retains_sorting ([&](hb_codepoint_t old_gid)
{
unsigned new_index = old_gid_new_index_map.get (old_gid);
return hb_pair_t<unsigned, unsigned> (old_gid, new_index);
})
;
return_trace (serialize (c->serializer, index_iter, &_post));
}
} /* namespace OT */
#endif /* HB_OT_POST_TABLE_V2SUBSET_HH */
|