#ifndef OT_LAYOUT_GPOS_MARKBASEPOSFORMAT1_HH
#define OT_LAYOUT_GPOS_MARKBASEPOSFORMAT1_HH
#include "MarkArray.hh"
namespace OT {
namespace Layout {
namespace GPOS_impl {
typedef AnchorMatrix BaseArray; /* base-major--
* in order of BaseCoverage Index--,
* mark-minor--
* ordered by class--zero-based. */
template <typename Types>
struct MarkBasePosFormat1_2
{
protected:
HBUINT16 format; /* Format identifier--format = 1 */
typename Types::template OffsetTo<Coverage>
markCoverage; /* Offset to MarkCoverage table--from
* beginning of MarkBasePos subtable */
typename Types::template OffsetTo<Coverage>
baseCoverage; /* Offset to BaseCoverage table--from
* beginning of MarkBasePos subtable */
HBUINT16 classCount; /* Number of classes defined for marks */
typename Types::template OffsetTo<MarkArray>
markArray; /* Offset to MarkArray table--from
* beginning of MarkBasePos subtable */
typename Types::template OffsetTo<BaseArray>
baseArray; /* Offset to BaseArray table--from
* beginning of MarkBasePos subtable */
public:
DEFINE_SIZE_STATIC (4 + 4 * Types::size);
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
markCoverage.sanitize (c, this) &&
baseCoverage.sanitize (c, this) &&
markArray.sanitize (c, this) &&
baseArray.sanitize (c, this, (unsigned int) classCount));
}
bool intersects (const hb_set_t *glyphs) const
{
return (this+markCoverage).intersects (glyphs) &&
(this+baseCoverage).intersects (glyphs);
}
void closure_lookups (hb_closure_lookups_context_t *c) const {}
void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
{
+ hb_zip (this+markCoverage, this+markArray)
| hb_filter (c->glyph_set, hb_first)
| hb_map (hb_second)
| hb_apply ([&] (const MarkRecord& record) { record.collect_variation_indices (c, &(this+markArray)); })
;
hb_map_t klass_mapping;
Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, *c->glyph_set, &klass_mapping);
unsigned basecount = (this+baseArray).rows;
auto base_iter =
+ hb_zip (this+baseCoverage, hb_range (basecount))
| hb_filter (c->glyph_set, hb_first)
| hb_map (hb_second)
;
hb_sorted_vector_t<unsigned> base_indexes;
for (const unsigned row : base_iter)
{
+ hb_range ((unsigned) classCount)
| hb_filter (klass_mapping)
| hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; })
| hb_sink (base_indexes)
;
}
(this+baseArray).collect_variation_indices (c, base_indexes.iter ());
}
void collect_glyphs (hb_collect_glyphs_context_t *c) const
{
if (unlikely (!(this+markCoverage).collect_coverage (c->input))) return;
if (unlikely (!(this+baseCoverage).collect_coverage (c->input))) return;
}
const Coverage &get_coverage () const { return this+markCoverage; }
bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
hb_buffer_t *buffer = c->buffer;
unsigned int mark_index = (this+markCoverage).get_coverage (buffer->cur().codepoint);
if (likely (mark_index == NOT_COVERED)) return_trace (false);
/* Now we search backwards for a non-mark glyph */
hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input;
skippy_iter.reset (buffer->idx, 1);
skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks);
do {
unsigned unsafe_from;
if (!skippy_iter.prev (&unsafe_from))
{
buffer->unsafe_to_concat_from_outbuffer (unsafe_from, buffer->idx + 1);
return_trace (false);
}
/* We only want to attach to the first of a MultipleSubst sequence.
* https://github.com/harfbuzz/harfbuzz/issues/740
* Reject others...
* ...but stop if we find a mark in the MultipleSubst sequence:
* https://github.com/harfbuzz/harfbuzz/issues/1020 */
if (!_hb_glyph_info_multiplied (&buffer->info[skippy_iter.idx]) ||
0 == _hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx]) ||
(skippy_iter.idx == 0 ||
_hb_glyph_info_is_mark (&buffer->info[skippy_iter.idx - 1]) ||
!_hb_glyph_info_multiplied (&buffer->info[skippy_iter.idx - 1]) ||
_hb_glyph_info_get_lig_id (&buffer->info[skippy_iter.idx]) !=
_hb_glyph_info_get_lig_id (&buffer->info[skippy_iter.idx - 1]) ||
_hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx]) !=
_hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx - 1]) + 1
))
break;
skippy_iter.reject ();
} while (true);
/* Checking that matched glyph is actually a base glyph by GDEF is too strong; disabled */
//if (!_hb_glyph_info_is_base_glyph (&buffer->info[skippy_iter.idx])) { return_trace (false); }
unsigned int base_index = (this+baseCoverage).get_coverage (buffer->info[skippy_iter.idx].codepoint);
if (base_index == NOT_COVERED)
{
buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1);
return_trace (false);
}
return_trace ((this+markArray).apply (c, mark_index, base_index, this+baseArray, classCount, skippy_iter.idx));
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
const hb_map_t &glyph_map = *c->plan->glyph_map;
auto *out = c->serializer->start_embed (*this);
if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
out->format = format;
hb_map_t klass_mapping;
Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, glyphset, &klass_mapping);
if (!klass_mapping.get_population ()) return_trace (false);
out->classCount = klass_mapping.get_population ();
auto mark_iter =
+ hb_zip (this+markCoverage, this+markArray)
| hb_filter (glyphset, hb_first)
;
hb_sorted_vector_t<hb_codepoint_t> new_coverage;
+ mark_iter
| hb_map (hb_first)
| hb_map (glyph_map)
| hb_sink (new_coverage)
;
if (!out->markCoverage.serialize_serialize (c->serializer, new_coverage.iter ()))
return_trace (false);
out->markArray.serialize_subset (c, markArray, this,
(this+markCoverage).iter (),
&klass_mapping);
unsigned basecount = (this+baseArray).rows;
auto base_iter =
+ hb_zip (this+baseCoverage, hb_range (basecount))
| hb_filter (glyphset, hb_first)
;
new_coverage.reset ();
+ base_iter
| hb_map (hb_first)
| hb_map (glyph_map)
| hb_sink (new_coverage)
;
if (!out->baseCoverage.serialize_serialize (c->serializer, new_coverage.iter ()))
return_trace (false);
hb_sorted_vector_t<unsigned> base_indexes;
for (const unsigned row : + base_iter
| hb_map (hb_second))
{
+ hb_range ((unsigned) classCount)
| hb_filter (klass_mapping)
| hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; })
| hb_sink (base_indexes)
;
}
out->baseArray.serialize_subset (c, baseArray, this,
base_iter.len (),
base_indexes.iter ());
return_trace (true);
}
};
}
}
}
#endif /* OT_LAYOUT_GPOS_MARKBASEPOSFORMAT1_HH */