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[cff] Correctly trace SIDs that contain NULL bytes. 

We need this to properly trace Multiple Master CFFs, which contain
two SIDs that are charstrings.

This commit makes FreeType also show the last SID, omitted
previously due to a bug.

* src/cff/cfftypes.h (CFF_FontRec): Add `string_pool_size' field.

* src/cff/cffload.c (cff_index_get_pointers): Add argument to return
the pool size.
Update all callers.

* src/cff/cffobjs.c (cff_face_init) [FT_DEBUG_LEVEL_TRACE]: Directly
access `cff->strings' to display the non-default strings.
This commit is contained in:
Werner Lemberg 2016-02-15 14:28:28 +01:00
parent 3295039107
commit 658f530ef5
4 changed files with 73 additions and 14 deletions
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19
ChangeLog
View File

@ -1,3 +1,22 @@
2016-02-15 Werner Lemberg <wl@gnu.org>
[cff] Correctly trace SIDs that contain NULL bytes.
We need this to properly trace Multiple Master CFFs, which contain
two SIDs that are charstrings.
This commit makes FreeType also show the last SID, omitted
previously due to a bug.
* src/cff/cfftypes.h (CFF_FontRec): Add `string_pool_size' field.
* src/cff/cffload.c (cff_index_get_pointers): Add argument to return
the pool size.
Update all callers.
* src/cff/cffobjs.c (cff_face_init) [FT_DEBUG_LEVEL_TRACE]: Directly
access `cff->strings' to display the non-default strings.
2016-02-14 Werner Lemberg <wl@gnu.org>
* src/base/fthash.c: Include FT_INTERNAL_MEMORY_H.

30
src/cff/cffload.c
View File

@ -382,13 +382,15 @@
static FT_Error
cff_index_get_pointers( CFF_Index idx,
FT_Byte*** table,
FT_Byte** pool )
FT_Byte** pool,
FT_ULong* pool_size )
{
FT_Error error = FT_Err_Ok;
FT_Memory memory = idx->stream->memory;
FT_Byte** t = NULL;
FT_Byte* new_bytes = NULL;
FT_ULong new_size;
*table = NULL;
@ -400,10 +402,11 @@
goto Exit;
}
if ( idx->count > 0 &&
!FT_NEW_ARRAY( t, idx->count + 1 ) &&
( !pool || !FT_ALLOC( new_bytes,
idx->data_size + idx->count ) ) )
new_size = idx->data_size + idx->count;
if ( idx->count > 0 &&
!FT_NEW_ARRAY( t, idx->count + 1 ) &&
( !pool || !FT_ALLOC( new_bytes, new_size ) ) )
{
FT_ULong n, cur_offset;
FT_ULong extra = 0;
@ -459,6 +462,8 @@
if ( pool )
*pool = new_bytes;
if ( pool_size )
*pool_size = new_size;
}
Exit:
@ -1408,7 +1413,7 @@
goto Exit;
error = cff_index_get_pointers( &font->local_subrs_index,
&font->local_subrs, NULL );
&font->local_subrs, NULL, NULL );
if ( error )
goto Exit;
}
@ -1486,16 +1491,17 @@
/* read the name, top dict, string and global subrs index */
if ( FT_SET_ERROR( cff_index_init( &font->name_index,
stream, 0 ) ) ||
stream, 0 ) ) ||
FT_SET_ERROR( cff_index_init( &font->font_dict_index,
stream, 0 ) ) ||
stream, 0 ) ) ||
FT_SET_ERROR( cff_index_init( &string_index,
stream, 1 ) ) ||
stream, 1 ) ) ||
FT_SET_ERROR( cff_index_init( &font->global_subrs_index,
stream, 1 ) ) ||
stream, 1 ) ) ||
FT_SET_ERROR( cff_index_get_pointers( &string_index,
&font->strings,
&font->string_pool ) ) )
&font->string_pool,
&font->string_pool_size ) ) )
goto Exit;
font->num_strings = string_index.count;
@ -1622,7 +1628,7 @@
font->num_glyphs = font->charstrings_index.count;
error = cff_index_get_pointers( &font->global_subrs_index,
&font->global_subrs, NULL );
&font->global_subrs, NULL, NULL );
if ( error )
goto Exit;

37
src/cff/cffobjs.c
View File

@ -625,11 +625,44 @@
FT_TRACE4(( "SIDs\n" ));
/* dump string index, including default strings for convenience */
for ( idx = 0; idx < cff->num_strings + 390; idx++ )
for ( idx = 0; idx <= 390; idx++ )
{
s = cff_index_get_sid_string( cff, idx );
if ( s )
FT_TRACE4((" %5d %s\n", idx, s ));
FT_TRACE4(( " %5d %s\n", idx, s ));
}
/* In Multiple Master CFFs, two SIDs hold the Normalize Design */
/* Vector (NDV) and Convert Design Vector (CDV) charstrings, */
/* which may contain NULL bytes in the middle of the data, too. */
/* We thus access `cff->strings' directly. */
for ( idx = 1; idx < cff->num_strings; idx++ )
{
FT_Byte* s1 = cff->strings[idx - 1];
FT_Byte* s2 = cff->strings[idx];
size_t s1len = s2 - s1 - 1; /* without the final NULL byte */
size_t l;
FT_TRACE4(( " %5d ", idx + 390, s ));
for ( l = 0; l < s1len; l++ )
FT_TRACE4(( "%c", s1[l] ));
FT_TRACE4(( "\n" ));
}
/* print last element */
if ( cff->num_strings )
{
FT_Byte* s1 = cff->strings[cff->num_strings - 1];
FT_Byte* s2 = cff->string_pool + cff->string_pool_size;
size_t s1len = s2 - s1 - 1;
size_t l;
FT_TRACE4(( " %5d ", cff->num_strings + 390, s ));
for ( l = 0; l < s1len; l++ )
FT_TRACE4(( "%c", s1[l] ));
FT_TRACE4(( "\n" ));
}
}
#endif /* FT_DEBUG_LEVEL_TRACE */

1
src/cff/cfftypes.h
View File

@ -255,6 +255,7 @@ FT_BEGIN_HEADER
FT_UInt num_strings;
FT_Byte** strings;
FT_Byte* string_pool;
FT_ULong string_pool_size;
CFF_SubFontRec top_font;
FT_UInt num_subfonts;