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freetype2
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[psaux] Extend Adobe interpreter. (callsubr) 

* src/psaux/psintrp.c (cf2_interpT2CharString)
<callsubr>: Type 1 mode.

* src/psaux/psft.c (cf2_initLocalRegionBuffer): Add Type 1 mode.
This commit is contained in:
Ewald Hew 2017-07-24 11:41:14 +08:00
parent 1252a41976
commit f69fcb0ede
2 changed files with 34 additions and 7 deletions
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34
src/psaux/psft.c
View File

@ -718,14 +718,40 @@
FT_ZERO( buf );
idx = (CF2_UInt)( subrNum + decoder->locals_bias );
if ( idx >= decoder->num_locals )
if ( idx < 0 || idx >= decoder->num_locals )
return TRUE; /* error */
FT_ASSERT( decoder->locals );
buf->start =
buf->ptr = decoder->locals[idx];
buf->end = decoder->locals[idx + 1];
buf->start = decoder->locals[idx];
if ( decoder->builder.is_t1 )
{
/* The Type 1 driver stores subroutines without the seed bytes. */
/* The CID driver stores subroutines with seed bytes. This */
/* case is taken care of when decoder->subrs_len == 0. */
if ( decoder->locals_len )
buf->end = buf->start + decoder->locals_len[idx];
else
{
/* We are using subroutines from a CID font. We must adjust */
/* for the seed bytes. */
buf->start += ( decoder->lenIV >= 0 ? decoder->lenIV : 0 );
buf->end = decoder->locals[idx + 1];
}
if ( !buf->start )
{
FT_ERROR(( "cf2_initLocalRegionBuffer (Type 1 mode):"
" invoking empty subrs\n" ));
}
}
else
{
buf->end = decoder->locals[idx + 1];
}
buf->ptr = buf->start;
return FALSE; /* success */
}

7
src/psaux/psintrp.c
View File

@ -975,7 +975,8 @@
FT_TRACE4(( op1 == cf2_cmdCALLGSUBR ? " callgsubr"
: " callsubr" ));
if ( charstringIndex > CF2_MAX_SUBR )
if ( ( !font->isT1 && charstringIndex > CF2_MAX_SUBR ) ||
( font->isT1 && charstringIndex > T1_MAX_SUBRS_CALLS ) )
{
/* max subr plus one for charstring */
lastError = FT_THROW( Invalid_Glyph_Format );
@ -991,10 +992,10 @@
/* set up the new CFF region and pointer */
subrNum = cf2_stack_popInt( opStack );
if ( font->isT1 && decoder->subrs_hash )
if ( font->isT1 && decoder->locals_hash )
{
size_t* val = ft_hash_num_lookup( subrNum,
decoder->subrs_hash );
decoder->locals_hash );
if ( val )
subrNum = *val;