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[subset] use a reference to cached global/loca subrs. 

Previously they were being copied in. Copying is no longer necessary now that hint dropping doesn't mutate the arrays.
This commit is contained in:
Garret Rieger 2022-11-28 20:35:34 +00:00 committed by Behdad Esfahbod
parent ded9de9cd8
commit bd37900e0d
1 changed files with 35 additions and 56 deletions
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91
src/hb-subset-cff-common.hh
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@ -606,33 +606,33 @@ struct subr_subsetter_t
// If we are not dropping hinting then charstrings are not modified so we can
// just use a reference to the cached copies.
cached_charstrings.resize (plan->num_output_glyphs ());
parsed_global_subrs = &cff_accelerator->parsed_global_subrs;
parsed_local_subrs = &cff_accelerator->parsed_local_subrs;
} else {
parsed_charstrings.resize (plan->num_output_glyphs ());
}
parsed_global_subrs_storage.resize (acc.globalSubrs->count);
parsed_global_subrs.resize (acc.globalSubrs->count);
if (unlikely (!parsed_local_subrs_storage.resize (fd_count))) return false;
for (unsigned int i = 0; i < acc.fdCount; i++)
{
unsigned count = acc.privateDicts[i].localSubrs->count;
parsed_local_subrs_storage[i].resize (count);
if (unlikely (parsed_local_subrs_storage[i].in_error ())) return false;
}
parsed_global_subrs = &parsed_global_subrs_storage;
parsed_local_subrs = &parsed_local_subrs_storage;
}
if (unlikely (remaps.in_error()
|| cached_charstrings.in_error ()
|| parsed_charstrings.in_error ()
|| parsed_global_subrs.in_error ())) {
|| parsed_global_subrs->in_error ()
|| closures.in_error ())) {
return false;
}
if (unlikely (!parsed_local_subrs.resize (fd_count))) return false;
for (unsigned int i = 0; i < acc.fdCount; i++)
{
unsigned count = cff_accelerator
? cff_accelerator->parsed_local_subrs[i].length
: acc.privateDicts[i].localSubrs->count;
parsed_local_subrs[i].resize (count);
if (unlikely (parsed_local_subrs[i].in_error ())) return false;
}
if (unlikely (closures.in_error ()))
return false;
/* phase 1 & 2 */
for (unsigned int i = 0; i < plan->num_output_glyphs (); i++)
{
@ -662,8 +662,8 @@ struct subr_subsetter_t
parsed_charstrings[i].alloc (str.length / 2);
subr_subset_param_t param (&parsed_charstrings[i],
&parsed_global_subrs,
&parsed_local_subrs[fd],
&parsed_global_subrs_storage,
&parsed_local_subrs_storage[fd],
&closures.global_closure,
&closures.local_closures[fd],
plan->flags & HB_SUBSET_FLAGS_NO_HINTING);
@ -679,9 +679,9 @@ struct subr_subsetter_t
// to compute the subroutine closures which would have normally happened during
// parsing.
if (cff_accelerator &&
!closure_and_copy_subroutines(!(plan->flags & HB_SUBSET_FLAGS_NO_HINTING),
cff_accelerator->parsed_global_subrs,
cff_accelerator->parsed_local_subrs))
!closure_subroutines(!(plan->flags & HB_SUBSET_FLAGS_NO_HINTING),
*parsed_global_subrs,
*parsed_local_subrs))
return false;
if ((plan->flags & HB_SUBSET_FLAGS_NO_HINTING && !cff_accelerator) ||
@ -697,8 +697,8 @@ struct subr_subsetter_t
if (unlikely (fd >= acc.fdCount))
return false;
subr_subset_param_t param (&parsed_charstrings[i],
&parsed_global_subrs,
&parsed_local_subrs[fd],
&parsed_global_subrs_storage,
&parsed_local_subrs_storage[fd],
&closures.global_closure,
&closures.local_closures[fd],
plan->flags & HB_SUBSET_FLAGS_NO_HINTING);
@ -715,7 +715,7 @@ struct subr_subsetter_t
/* after dropping hints recreate closures of actually used subrs */
if (plan->flags & HB_SUBSET_FLAGS_NO_HINTING &&
!cff_accelerator &&
!closure_subroutines(false, parsed_global_subrs, parsed_local_subrs)) return false;
!closure_subroutines(false, *parsed_global_subrs, *parsed_local_subrs)) return false;
}
remaps.create (closures);
@ -766,12 +766,12 @@ struct subr_subsetter_t
bool encode_globalsubrs (str_buff_vec_t &buffArray)
{
return encode_subrs (parsed_global_subrs, remaps.global_remap, 0, buffArray);
return encode_subrs (*parsed_global_subrs, remaps.global_remap, 0, buffArray);
}
bool encode_localsubrs (unsigned int fd, str_buff_vec_t &buffArray) const
{
return encode_subrs (parsed_local_subrs[fd], remaps.local_remaps[fd], fd, buffArray);
return encode_subrs ((*parsed_local_subrs)[fd], remaps.local_remaps[fd], fd, buffArray);
}
protected:
@ -906,31 +906,6 @@ struct subr_subsetter_t
return seen_hint;
}
bool closure_and_copy_subroutines (bool hinting,
parsed_cs_str_vec_t& global_subrs,
hb_vector_t<parsed_cs_str_vec_t>& local_subrs)
{
if (!closure_subroutines(hinting,
global_subrs,
local_subrs)) return false;
for (unsigned s : closures.global_closure) {
parsed_global_subrs[s] = global_subrs[s];
}
unsigned fd = 0;
for (const hb_set_t& c : closures.local_closures) {
for (unsigned s : c) {
parsed_local_subrs[fd][s] = local_subrs[fd][s];
}
fd++;
}
return true;
}
bool closure_subroutines (bool hinting,
parsed_cs_str_vec_t& global_subrs,
hb_vector_t<parsed_cs_str_vec_t>& local_subrs)
@ -1048,8 +1023,8 @@ struct subr_subsetter_t
plan->inprogress_accelerator->cff_accelerator =
cff_subset_accelerator_t::create(acc.blob,
parsed_charstrings,
parsed_global_subrs,
parsed_local_subrs);
parsed_global_subrs_storage,
parsed_local_subrs_storage);
plan->inprogress_accelerator->destroy_cff_accelerator =
cff_subset_accelerator_t::destroy;
@ -1075,12 +1050,16 @@ struct subr_subsetter_t
hb_vector_t<parsed_cs_str_t*> cached_charstrings;
parsed_cs_str_vec_t parsed_charstrings;
parsed_cs_str_vec_t parsed_global_subrs;
hb_vector_t<parsed_cs_str_vec_t> parsed_local_subrs;
parsed_cs_str_vec_t* parsed_global_subrs;
hb_vector_t<parsed_cs_str_vec_t>* parsed_local_subrs;
subr_remaps_t remaps;
private:
parsed_cs_str_vec_t parsed_global_subrs_storage;
hb_vector_t<parsed_cs_str_vec_t> parsed_local_subrs_storage;
typedef typename SUBRS::count_type subr_count_type;
};