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added skip(), get_next_value() to inc_bimap to subset VarStore with retain-gids

This commit is contained in:
blueshade7 2019-07-12 23:02:29 -07:00
parent 634390ecaf
commit 68ac767e43
2 changed files with 31 additions and 8 deletions
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25
src/hb-bimap.hh
View File

@ -94,6 +94,14 @@ struct hb_bimap_t
/* Inremental bimap: only lhs is given, rhs is incrementally assigned */
struct hb_inc_bimap_t : hb_bimap_t
{
hb_inc_bimap_t () { init (); }
void init ()
{
hb_bimap_t::init ();
next_value = 0;
}
/* Add a mapping from lhs to rhs with a unique value if lhs is unknown.
* Return the rhs value as the result.
*/
@ -102,12 +110,24 @@ struct hb_inc_bimap_t : hb_bimap_t
hb_codepoint_t rhs = forw_map[lhs];
if (rhs == HB_MAP_VALUE_INVALID)
{
rhs = get_population ();
rhs = next_value++;
set (lhs, rhs);
}
return rhs;
}
hb_codepoint_t skip ()
{ return next_value++; }
hb_codepoint_t get_next_value () const
{ return next_value; }
void add_set (const hb_set_t *set)
{
hb_codepoint_t i = HB_SET_VALUE_INVALID;
while (hb_set_next (set, &i)) add (i);
}
/* Create an identity map. */
bool identity (unsigned int size)
{
@ -138,6 +158,9 @@ struct hb_inc_bimap_t : hb_bimap_t
for (hb_codepoint_t rhs = 0; rhs < count; rhs++)
set (work[rhs], rhs);
}
protected:
unsigned int next_value;
};
#endif /* HB_BIMAP_HH */

12
src/hb-ot-layout-common.hh
View File

@ -1786,12 +1786,12 @@ struct VarData
bool serialize (hb_serialize_context_t *c,
const VarData *src,
const hb_bimap_t &inner_map,
const hb_inc_bimap_t &inner_map,
const hb_bimap_t &region_map)
{
TRACE_SERIALIZE (this);
if (unlikely (!c->extend_min (*this))) return_trace (false);
itemCount = inner_map.get_population ();
itemCount = inner_map.get_next_value ();
/* Optimize short count */
unsigned short ri_count = src->regionIndices.len;
@ -1805,7 +1805,7 @@ struct VarData
for (r = 0; r < ri_count; r++)
{
delta_sz[r] = kZero;
for (unsigned int i = 0; i < inner_map.get_population (); i++)
for (unsigned int i = 0; i < inner_map.get_next_value (); i++)
{
unsigned int old = inner_map.backward (i);
int16_t delta = src->get_item_delta (old, r);
@ -1849,13 +1849,13 @@ struct VarData
return_trace (true);
}
void collect_region_refs (hb_inc_bimap_t &region_map, const hb_bimap_t &inner_map) const
void collect_region_refs (hb_inc_bimap_t &region_map, const hb_inc_bimap_t &inner_map) const
{
for (unsigned int r = 0; r < regionIndices.len; r++)
{
unsigned int region = regionIndices[r];
if (region_map.has (region)) continue;
for (unsigned int i = 0; i < inner_map.get_population (); i++)
for (unsigned int i = 0; i < inner_map.get_next_value (); i++)
if (get_item_delta (inner_map.backward (i), r) != 0)
{
region_map.add (region);
@ -1939,7 +1939,7 @@ struct VariationStore
bool serialize (hb_serialize_context_t *c,
const VariationStore *src,
const hb_array_t <hb_bimap_t> &inner_maps)
const hb_array_t <hb_inc_bimap_t> &inner_maps)
{
TRACE_SERIALIZE (this);
unsigned int set_count = 0;