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[repacker] Begin implementing MarkBasePosFormat1::shrink.

This commit is contained in:
Garret Rieger 2022-08-11 22:53:30 +00:00
parent c9ddf0815a
commit bbe14417ad
1 changed files with 42 additions and 30 deletions
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72
src/graph/markbasepos-graph.hh
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@ -204,6 +204,18 @@ struct MarkBasePosFormat1 : public OT::Layout::GPOS_impl::MarkBasePosFormat1_2<S
hb_hashmap_t<unsigned, unsigned> mark_array_links;
hb_hashmap_t<unsigned, unsigned> base_array_links;
hb_set_t marks_for (unsigned start, unsigned end)
{
hb_set_t marks;
for (unsigned klass = start; klass < end; klass++)
{
+ class_to_info[klass].marks.iter ()
| hb_sink (marks)
;
}
return marks;
}
unsigned original_count ()
{
return thiz->classCount;
@ -259,37 +271,38 @@ struct MarkBasePosFormat1 : public OT::Layout::GPOS_impl::MarkBasePosFormat1_2<S
return class_to_info;
}
bool shrink (split_context_t& c,
bool shrink (split_context_t& sc,
unsigned this_index,
unsigned count)
{
/*
DEBUG_MSG (SUBSET_REPACK, nullptr,
" Shrinking PairPosFormat1 (%u) to [0, %u).",
" Shrinking MarkBasePosFormat1 (%u) to [0, %u).",
this_index,
count);
unsigned old_count = pairSet.len;
unsigned old_count = classCount;
if (count >= old_count)
return true;
pairSet.len = count;
c.graph.vertices_[this_index].obj.tail -= (old_count - count) * SmallTypes::size;
classCount = count;
unsigned coverage_id = c.graph.mutable_index_for_offset (this_index, &coverage);
unsigned coverage_size = c.graph.vertices_[coverage_id].table_size ();
auto& coverage_v = c.graph.vertices_[coverage_id];
Coverage* coverage_table = (Coverage*) coverage_v.obj.head;
if (!coverage_table || !coverage_table->sanitize (coverage_v))
auto mark_coverage = sc.c.graph.as_table<Coverage> (this_index,
&markCoverage);
if (!mark_coverage) return false;
hb_set_t marks = sc.marks_for (0, count);
auto new_coverage =
+ hb_zip (hb_range (), mark_coverage.table->iter ())
| hb_filter (marks, hb_first)
| hb_map_retains_sorting (hb_second)
;
if (!Coverage::make_coverage (sc.c, + new_coverage,
mark_coverage.index,
4 + 2 * marks.get_population ()))
return false;
auto new_coverage =
+ hb_zip (coverage_table->iter (), hb_range ())
| hb_filter ([&] (hb_pair_t<unsigned, unsigned> p) {
return p.second < count;
})
| hb_map_retains_sorting (hb_first)
;
// TODO: markArray, baseArray
/*
return Coverage::make_coverage (c, new_coverage, coverage_id, coverage_size);
*/
@ -305,8 +318,6 @@ struct MarkBasePosFormat1 : public OT::Layout::GPOS_impl::MarkBasePosFormat1_2<S
DEBUG_MSG (SUBSET_REPACK, nullptr,
" Cloning MarkBasePosFormat1 (%u) range [%u, %u).", this_index, start, end);
// TODO
graph_t& graph = sc.c.graph;
unsigned prime_size = OT::Layout::GPOS_impl::MarkBasePosFormat1_2<SmallTypes>::static_size;
@ -322,18 +333,19 @@ struct MarkBasePosFormat1 : public OT::Layout::GPOS_impl::MarkBasePosFormat1_2<S
graph.add_link (&(prime->baseCoverage), prime_id, base_coverage_id);
graph.duplicate (prime_id, base_coverage_id);
hb_set_t marks;
for (unsigned klass = start; klass < end; klass++)
{
+ sc.class_to_info[klass].marks.iter ()
| hb_sink (marks)
;
}
auto mark_coverage = sc.c.graph.as_table<Coverage> (this_index,
&markCoverage);
if (!mark_coverage) return false;
hb_set_t marks = sc.marks_for (start, end);
auto new_coverage =
+ hb_zip (hb_range (), mark_coverage.table->iter ())
| hb_filter (marks, hb_first)
| hb_map_retains_sorting (hb_second)
;
if (!Coverage::add_coverage (sc.c,
prime_id,
2,
+ marks.iter (),
+ new_coverage,
marks.get_population () * 2 + 4))
return -1;