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[truetype] Various minor fixes. 

* src/truetype/ttgload.c (TT_Load_Simple_Glyph): Check instruction
size only if we do native hinting.
(TT_Load_Glyph): Trace returned error code.

* src/truetype/ttobjs.c (tt_size_run_fpgm, tt_size_run_prep): Trace
returned error code.
(tt_size_ready_bytecode): Don't run `prep' table if `fpgm' table is
invalid.
This commit is contained in:
Werner Lemberg 2017-01-03 09:46:19 +01:00
parent 624b680289
commit 8982405f0c
3 changed files with 52 additions and 13 deletions
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13
ChangeLog
View File

@ -1,3 +1,16 @@
2017-01-03 Werner Lemberg <wl@gnu.org>
[truetype] Various minor fixes.
* src/truetype/ttgload.c (TT_Load_Simple_Glyph): Check instruction
size only if we do native hinting.
(TT_Load_Glyph): Trace returned error code.
* src/truetype/ttobjs.c (tt_size_run_fpgm, tt_size_run_prep): Trace
returned error code.
(tt_size_ready_bytecode): Don't run `prep' table if `fpgm' table is
invalid.
2017-01-03 Werner Lemberg <wl@gnu.org>
[sfnt] Don't fail if PCLT, EBLC (and similar tables) are invalid.

35
src/truetype/ttgload.c
View File

@ -398,18 +398,18 @@
FT_TRACE5(( " Instructions size: %u\n", n_ins ));
/* check it */
if ( ( limit - p ) < n_ins )
{
FT_TRACE0(( "TT_Load_Simple_Glyph: instruction count mismatch\n" ));
error = FT_THROW( Too_Many_Hints );
goto Fail;
}
#ifdef TT_USE_BYTECODE_INTERPRETER
if ( IS_HINTED( load->load_flags ) )
{
/* check instructions size */
if ( ( limit - p ) < n_ins )
{
FT_TRACE1(( "TT_Load_Simple_Glyph: instruction count mismatch\n" ));
error = FT_THROW( Too_Many_Hints );
goto Fail;
}
/* we don't trust `maxSizeOfInstructions' in the `maxp' table */
/* and thus update the bytecode array size by ourselves */
@ -2649,14 +2649,20 @@
/* if FT_LOAD_NO_SCALE is not set, `ttmetrics' must be valid */
if ( !( load_flags & FT_LOAD_NO_SCALE ) && !size->ttmetrics.valid )
return FT_THROW( Invalid_Size_Handle );
{
error = FT_THROW( Invalid_Size_Handle );
goto Exit;
}
if ( load_flags & FT_LOAD_SBITS_ONLY )
return FT_THROW( Invalid_Argument );
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
error = tt_loader_init( &loader, size, glyph, load_flags, FALSE );
if ( error )
return error;
goto Exit;
glyph->format = FT_GLYPH_FORMAT_OUTLINE;
glyph->num_subglyphs = 0;
@ -2731,6 +2737,13 @@
size->root.metrics.y_ppem < 24 )
glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
Exit:
#ifdef FT_DEBUG_LEVEL_TRACE
if ( error )
FT_TRACE1(( " failed (error code 0x%x)\n",
error ));
#endif
return error;
}

17
src/truetype/ttobjs.c
View File

@ -819,6 +819,11 @@
FT_TRACE4(( "Executing `fpgm' table.\n" ));
error = face->interpreter( exec );
#ifdef FT_DEBUG_LEVEL_TRACE
if ( error )
FT_TRACE4(( " interpretation failed with error code 0x%x\n",
error ));
#endif
}
else
error = FT_Err_Ok;
@ -882,8 +887,12 @@
TT_Goto_CodeRange( exec, tt_coderange_cvt, 0 );
FT_TRACE4(( "Executing `prep' table.\n" ));
error = face->interpreter( exec );
#ifdef FT_DEBUG_LEVEL_TRACE
if ( error )
FT_TRACE4(( " interpretation failed with error code 0x%x\n",
error ));
#endif
}
else
error = FT_Err_Ok;
@ -1075,8 +1084,10 @@
if ( size->bytecode_ready < 0 )
error = tt_size_init_bytecode( (FT_Size)size, pedantic );
else
error = size->bytecode_ready;
if ( error || size->bytecode_ready )
if ( error )
goto Exit;
/* rescale CVT when needed */
@ -1108,6 +1119,8 @@
error = tt_size_run_prep( size, pedantic );
}
else
error = size->cvt_ready;
Exit:
return error;