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[repack] implement device table transfer for PairPosFormat2.

This commit is contained in:
Garret Rieger 2022-08-02 21:47:53 +00:00
parent 22eae32b3b
commit 9f2a44640c
1 changed files with 77 additions and 5 deletions
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82
src/graph/pairpos-graph.hh
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@ -273,6 +273,9 @@ struct PairPosFormat2 : public OT::Layout::GPOS_impl::PairPosFormat2_4<SmallType
gsubgpos_graph_context_t& c;
unsigned this_index;
unsigned class1_record_size;
unsigned value_record_len;
unsigned value1_record_len;
unsigned value2_record_len;
const hb_hashmap_t<void*, unsigned>& device_tables;
const hb_vector_t<unsigned>& format1_device_table_indices;
@ -307,7 +310,10 @@ struct PairPosFormat2 : public OT::Layout::GPOS_impl::PairPosFormat2_4<SmallType
pair_pos_prime->valueFormat2 = this->valueFormat2;
pair_pos_prime->class1Count = this->class1Count;
pair_pos_prime->class2Count = this->class2Count;
clone_class1_records (split_context, pair_pos_prime, start, end);
clone_class1_records (split_context,
pair_pos_prime_id,
start,
end);
unsigned coverage_id =
split_context.c.graph.index_for_offset (split_context.this_index, &coverage);
@ -330,16 +336,82 @@ struct PairPosFormat2 : public OT::Layout::GPOS_impl::PairPosFormat2_4<SmallType
new_coverage->iter ()))
return -1;
// TODO: class def 2 (just link to existing)
// classDef2
unsigned class_def_2_id =
split_context.c.graph.index_for_offset (split_context.this_index, &classDef2);
auto* class_def_link = split_context.c.graph.vertices_[pair_pos_prime_id].obj.real_links.push ();
class_def_link->width = SmallTypes::size;
class_def_link->objidx = class_def_2_id;
class_def_link->position = 10;
split_context.c.graph.vertices_[class_def_2_id].parents.push (pair_pos_prime_id);
return -1; // TODO
return pair_pos_prime_id;
}
void clone_class1_records (split_context& split_context,
PairPosFormat2* pair_pos_prime,
unsigned pair_pos_prime_id,
unsigned start, unsigned end) const
{
// TODO: implement, in addition to copying the records, also move device tables as needed.
PairPosFormat2* pair_pos_prime =
(PairPosFormat2*) split_context.c.graph.object (pair_pos_prime_id).head;
char* start_addr = ((char*)&values[0]) + start * split_context.class1_record_size;
unsigned num_records = end - start;
memcpy (&pair_pos_prime->values[0],
start_addr,
num_records * split_context.class1_record_size);
if (!split_context.format1_device_table_indices
&& !split_context.format2_device_table_indices)
// No device tables to move over.
return;
unsigned class2_count = class2Count;
for (unsigned i = start; i < end; i++)
{
for (unsigned j = 0; j < class2_count; j++)
{
unsigned value1_index = split_context.value_record_len * (class2_count * i + j);
unsigned value2_index = value1_index + split_context.value1_record_len;
unsigned new_value1_index = split_context.value_record_len * (class2_count * (i - start) + j);
unsigned new_value2_index = new_value1_index + split_context.value1_record_len;
transfer_device_tables (split_context,
pair_pos_prime_id,
split_context.format1_device_table_indices,
value1_index,
new_value1_index);
transfer_device_tables (split_context,
pair_pos_prime_id,
split_context.format2_device_table_indices,
value2_index,
new_value2_index);
}
}
}
void transfer_device_tables (split_context& split_context,
unsigned pair_pos_prime_id,
const hb_vector_t<unsigned>& device_table_indices,
unsigned old_value_record_index,
unsigned new_value_record_index) const
{
PairPosFormat2* pair_pos_prime =
(PairPosFormat2*) split_context.c.graph.object (pair_pos_prime_id).head;
for (unsigned i : device_table_indices)
{
OT::Offset16* record = (OT::Offset16*) &values[old_value_record_index + i];
if (!split_context.device_tables.has ((void*) record)) continue;
split_context.c.graph.move_child (
split_context.this_index,
record,
pair_pos_prime_id,
(OT::Offset16*) &pair_pos_prime->values[new_value_record_index + i]);
}
}
bool shrink (gsubgpos_graph_context_t& c,