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CFF1 no-desubr fixes 

make sure charstring/subrs not ending with endchar/return handled correctly
if no local subrs, skip serializing Subrs op in Private
misc fixes
This commit is contained in:
Michiharu Ariza 2018-11-03 22:42:22 -07:00
parent 1da4de7e7b
commit 191ca0f15b
3 changed files with 62 additions and 37 deletions
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13
src/hb-ot-cff-common.hh
View File

@ -198,7 +198,7 @@ struct CFFIndex
{ return (const char *)this + min_size + offset_array_size (); }
inline unsigned int data_size (void) const
{ return HBINT8::static_size; };
{ return HBINT8::static_size; }
ByteStr operator [] (unsigned int index) const
{
@ -331,6 +331,17 @@ struct Dict : UnsizedByteStr
}
/* in parallel to above */
template <typename DICTVAL, typename OP_SERIALIZER, typename PARAM>
inline static unsigned int calculate_serialized_size (const DICTVAL &dictval,
OP_SERIALIZER& opszr,
PARAM& param)
{
unsigned int size = 0;
for (unsigned int i = 0; i < dictval.get_count (); i++)
size += opszr.calculate_serialized_size (dictval[i], param);
return size;
}
template <typename DICTVAL, typename OP_SERIALIZER>
inline static unsigned int calculate_serialized_size (const DICTVAL &dictval,
OP_SERIALIZER& opszr)

55
src/hb-subset-cff-common.hh
View File

@ -255,7 +255,7 @@ struct CFFPrivateDict_OpSerializer : OpSerializer
return true;
if (opstr.op == OpCode_Subrs)
{
if (desubroutinize)
if (desubroutinize || (subrsOffset == 0))
return_trace (true);
else
return_trace (FontDict::serialize_offset4_op (c, opstr.op, subrsOffset));
@ -264,13 +264,14 @@ struct CFFPrivateDict_OpSerializer : OpSerializer
return_trace (copy_opstr (c, opstr));
}
inline unsigned int calculate_serialized_size (const OpStr &opstr) const
inline unsigned int calculate_serialized_size (const OpStr &opstr,
bool has_localsubr=true) const
{
if (drop_hints && DictOpSet::is_hint_op (opstr.op))
return 0;
if (opstr.op == OpCode_Subrs)
{
if (desubroutinize)
if (desubroutinize || !has_localsubr)
return 0;
else
return OpCode_Size (OpCode_longintdict) + 4 + OpCode_Size (opstr.op);
@ -487,34 +488,32 @@ struct SubrSubsetParam
drop_hints = drop_hints_;
}
template <typename ENV>
inline void set_current_str (ENV &env)
inline ParsedCStr *get_parsed_str_for_context (CallContext &context)
{
const CallContext &context = env.context;
switch (context.type)
{
case CSType_CharString:
current_parsed_str = parsed_charstring;
break;
return parsed_charstring;
case CSType_LocalSubr:
if (likely (context.subr_num < parsed_local_subrs->len))
current_parsed_str = &(*parsed_local_subrs)[context.subr_num];
else
env.set_error ();
break;
return &(*parsed_local_subrs)[context.subr_num];
case CSType_GlobalSubr:
if (likely (context.subr_num < parsed_global_subrs->len))
current_parsed_str = &(*parsed_global_subrs)[context.subr_num];
return &(*parsed_global_subrs)[context.subr_num];
}
return nullptr;
}
template <typename ENV>
inline void set_current_str (ENV &env)
{
ParsedCStr *parsed_str = get_parsed_str_for_context (env.context);
if (likely (parsed_str != nullptr))
current_parsed_str = parsed_str;
else
env.set_error ();
break;
default:
assert (0);
}
}
ParsedCStr *current_parsed_str;
@ -559,7 +558,9 @@ struct SubrRemap : Remap
inline int biased_num (unsigned int old_num) const
{
return (int)(*this)[old_num] - bias;
hb_codepoint_t new_num = (*this)[old_num];
assert (new_num != CFF_UNDEF_CODE);
return (int)new_num - bias;
}
protected:
@ -670,8 +671,8 @@ struct SubrSubsetter
if (unlikely (!interp.interpret (param)))
return false;
/* copy CFF1 width or CFF2 vsindex to the parsed charstring for encoding */
SUBSETTER::set_parsed_prefix (interp.env, parsed_charstrings[i]);
/* finalize parsed string esp. copy CFF1 width or CFF2 vsindex to the parsed charstring for encoding */
SUBSETTER::finalize_parsed_str (interp.env, param, parsed_charstrings[i]);
}
if (drop_hints)
@ -692,7 +693,7 @@ struct SubrSubsetter
parsed_charstrings[i].set_hint_removed ();
}
/* after dropping hints recreate closures from subrs actually used */
/* after dropping hints recreate closures of actually used subrs */
closures.reset ();
for (unsigned int i = 0; i < glyphs.len; i++)
{
@ -724,7 +725,7 @@ struct SubrSubsetter
return true;
}
inline bool encode_subrs (const ParsedCStrs &subrs, const SubrRemap& remap, StrBuffArray &buffArray) const
inline bool encode_subrs (const ParsedCStrs &subrs, const SubrRemap& remap, unsigned int fd, StrBuffArray &buffArray) const
{
unsigned int count = remap.get_count ();
@ -735,7 +736,7 @@ struct SubrSubsetter
hb_codepoint_t new_num = remap[old_num];
if (new_num != CFF_UNDEF_CODE)
{
if (unlikely (!encode_str (subrs[old_num], 0, buffArray[new_num])))
if (unlikely (!encode_str (subrs[old_num], fd, buffArray[new_num])))
return false;
}
}
@ -744,12 +745,12 @@ struct SubrSubsetter
inline bool encode_globalsubrs (StrBuffArray &buffArray)
{
return encode_subrs (parsed_global_subrs, remaps.global_remap, buffArray);
return encode_subrs (parsed_global_subrs, remaps.global_remap, 0, buffArray);
}
inline bool encode_localsubrs (unsigned int fd, StrBuffArray &buffArray) const
{
return encode_subrs (parsed_local_subrs[fd], remaps.local_remaps[fd], buffArray);
return encode_subrs (parsed_local_subrs[fd], remaps.local_remaps[fd], fd, buffArray);
}
protected:

27
src/hb-subset-cff1.cc
View File

@ -390,9 +390,6 @@ struct CFF1CSOpSet_SubrSubset : CFF1CSOpSet<CFF1CSOpSet_SubrSubset, SubrSubsetPa
param.current_parsed_str->add_call_op (op, substr, env.context.subr_num);
hb_set_add (closure, env.context.subr_num);
param.set_current_str (env);
if ( unlikely (!param.current_parsed_str->is_parsed ()
&& (param.current_parsed_str->values.len > 0)))
env.set_error ();
}
private:
@ -401,10 +398,24 @@ struct CFF1CSOpSet_SubrSubset : CFF1CSOpSet<CFF1CSOpSet_SubrSubset, SubrSubsetPa
struct CFF1SubrSubsetter : SubrSubsetter<CFF1SubrSubsetter, CFF1Subrs, const OT::cff1::accelerator_subset_t, CFF1CSInterpEnv, CFF1CSOpSet_SubrSubset>
{
static inline void set_parsed_prefix (const CFF1CSInterpEnv &env, ParsedCStr &charstring)
static inline void finalize_parsed_str (CFF1CSInterpEnv &env, SubrSubsetParam& param, ParsedCStr &charstring)
{
/* insert width at the beginning of the charstring as necessary */
if (env.has_width)
charstring.set_prefix (env.width);
/* subroutines/charstring left on the call stack are legally left unmarked
* unmarked when a subroutine terminates with endchar. mark them.
*/
param.current_parsed_str->set_parsed ();
for (unsigned int i = 0; i < env.callStack.get_count (); i++)
{
ParsedCStr *parsed_str = param.get_parsed_str_for_context (env.callStack[i]);
if (likely (parsed_str != nullptr))
parsed_str->set_parsed ();
else
env.set_error ();
}
}
};
@ -774,15 +785,16 @@ struct cff_subset_plan {
{
if (fdmap.includes (i))
{
bool has_localsubrs = offsets.localSubrsInfos[i].size > 0;
CFFPrivateDict_OpSerializer privSzr (desubroutinize, plan->drop_hints);
unsigned int priv_size = PrivateDict::calculate_serialized_size (acc.privateDicts[i], privSzr);
unsigned int priv_size = PrivateDict::calculate_serialized_size (acc.privateDicts[i], privSzr, has_localsubrs);
TableInfo privInfo = { final_size, priv_size, 0 };
FontDictValuesMod fontdict_mod;
fontdict_mod.init ( &acc.fontDicts[i], sidmap[acc.fontDicts[i].fontName], privInfo );
fontdicts_mod.push (fontdict_mod);
final_size += privInfo.size;
if (!plan->desubroutinize && (offsets.localSubrsInfos[i].size > 0))
if (!plan->desubroutinize && has_localsubrs)
{
offsets.localSubrsInfos[i].offset = final_size;
final_size += offsets.localSubrsInfos[i].size;
@ -1014,7 +1026,8 @@ static inline bool _write_cff1 (const cff_subset_plan &plan,
bool result;
CFFPrivateDict_OpSerializer privSzr (plan.desubroutinize, plan.drop_hints);
/* N.B. local subrs immediately follows its corresponding private dict. i.e., subr offset == private dict size */
result = pd->serialize (&c, acc.privateDicts[i], privSzr, priv_size);
unsigned int subroffset = (plan.offsets.localSubrsInfos[i].size > 0)? priv_size: 0;
result = pd->serialize (&c, acc.privateDicts[i], privSzr, subroffset);
if (unlikely (!result))
{
DEBUG_MSG (SUBSET, nullptr, "failed to serialize CFF Private Dict[%d]", i);