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137 Commits

Author SHA1 Message Date
suzuki toshiya 5edc2f339a Fix Savannah bug #31040. 
* src/truetype/ttinterp.c (free_buffer_in_size): Remove.
(TT_RunIns): Updated.
 2010-10-01 08:15:55 +02:00
suzuki toshiya db053ec9a5 [truetype] Don't duplicate size->twilight structure to be freed. 
* src/truetype/ttinterp.c (free_buffer_in_size): Don't duplicate
FT_GlyphZoneRec size->twilight to be freed.  If duplicated,
FT_FREE() erases the duplicated pointers only and leave original
pointers.  They can cause the double-free crash when the burst
errors occur in TrueType interpreter and free_buffer_in_size()
is invoked repeatedly.  See Savannah bug #31040 for detail.
 2010-09-17 23:20:00 +09:00
Werner Lemberg afd89d309d Make bytecode debugging with FontForge work again. 
* src/truetype/ttinterp.c (TT_RunIns): Don't call
`free_buffer_in_size' in case of error if a debugger is active.
 2010-09-15 13:02:35 +02:00
Werner Lemberg 6abb9232b6 Improve tracing messages. 
* src/truetype/ttinterp.c (TT_RunIns): Improve wording of tracing
message.
* src/truetype/ttobjs.c (tt_size_run_fpgm, tt_size_run_prep): Add
tracing message.
* src/truetype/ttgload.c (tt_loader_init): Add tracing message.
* src/cache/ftcsbits.c (ftc_snode_load): Emit tracing message if
glyph doesn't fit into a small bitmap container.
 2010-09-14 09:02:10 +02:00
Werner Lemberg 5220ef58c5 Fix minor issues reported by <muktha.narayan@wipro.com>. 
* src/autofit/aflatin.c (af_latin_compute_stem_width): Remove
redundant conditional check.
* src/base/ftsynth.c (FT_GlyphSlot_Embolden): Ditto.
* src/cff/cffload.c (cff_encoding_load): Remove conditional check
which always evaluates to `true'.
* src/pshinter/pshalgo.c (ps_glyph_interpolate_strong_points):
Ditto.
* src/truetype/ttinterp.c (Ins_IUP): Ditto.
* src/cid/cidgload.c (cid_slot_load_glyph): Don't check for NULL if
value is already dereferenced.
* src/winfonts/winfnt.c (FNT_Load_Glyph): Fix check of `face'.
 2010-09-13 07:32:22 +02:00
suzuki toshiya 0eb657b0aa [truetype] Decrease the trace level catching the interpreter error. 
* src/truetype/ttinterp.c (TT_RunIns): Decrease the trace level
showing the error when the interpreter returns with an error,
from FT_TRACE7() to FT_TRACE1().
 2010-08-31 13:29:05 +09:00
suzuki toshiya 29e044a4af [truetype] Prevent bytecode reuse after the interpretation error. 
* src/truetype/ttinterp.c (free_buffer_in_size): New function to
free the buffer allocated during the interpretation of this glyph.
(TT_RunIns): Unset FT_Face->size->{cvt_ready,bytecode_ready} if
an error occurs in the bytecode interpretation.  The interpretation
of invalid bytecode may break the function definitions and referring
them in later interpretation is danger.  By unsetting these flags,
`fpgm' and `prep' tables are executed again in next interpretation.

Fix Savannah bug #30798, reported by Robert Swiecki.
 2010-08-31 01:23:30 +09:00
Werner Lemberg 346f1867fd Fix Savannah bug #30657. 
* src/truetype/ttinterp.c (BOUNDSL): New macro.
Change `BOUNDS' to `BOUNDSL' where appropriate.

* src/truetype/ttinterp.h (TT_ExecContextRec): Fix type of
`cvtSize'.
 2010-08-06 00:47:57 +02:00
Werner Lemberg 888cd1843e Fix Savannah bug #30361. 
* src/truetype/ttinterp.c (Ins_IUP): Fix bounds check.
 2010-07-08 07:29:42 +02:00
Werner Lemberg a2d225e322 [truetype] Protect against code range underflow. 
* src/truetype/ttinterp.c (DO_JROT, DO_JMPR, DO_JROF): Don't allow
negative IP values.
 2010-07-01 11:37:09 +02:00
Werner Lemberg 462ddb4072 [truetype] Add rudimentary tracing for bytecode instructions. 
* src/truetype/ttinterp.c (opcode_name) [FT_DEBUG_LEVEL_TRACE]: New
array.
(TT_RunIns): Trace opcodes.
 2010-07-01 11:28:43 +02:00
Werner Lemberg 370aea802c Formatting. 2010-06-08 08:37:11 +02:00
Werner Lemberg 6da023d1ff TrueType: Make FreeType ignore maxSizeOfInstructions in `maxp'. 
Acroread does the same.

* src/truetype/ttgload.c (TT_Process_Composite_Glyph): Call
`Update_Max' to adjust size of instructions array if necessary and
add a rough safety check.

(load_truetype_glyph): Save `loader->byte_len' before recursive
call.

* src/truetype/ttinterp.h, src/truetype/ttinterp.c (Update_Max):
Declare it as FT_LOCAL.
 2010-05-20 15:38:00 +02:00
suzuki toshiya a115142057 truetype: Check invalid function number in IDEF instruction. 2009-08-01 00:32:18 +09:00
suzuki toshiya d1c23082b6 truetype: Check invalid function number in FDEF instruction. 2009-08-01 00:32:17 +09:00
suzuki toshiya 6dc27526a9 truetype: Cast the numerical operands to 32-bit for LP64 systems. 2009-08-01 00:32:15 +09:00
suzuki toshiya 3b56c4d390 truetype: Cast the project vector to 32-bit for LP64 system. 2009-08-01 00:32:15 +09:00
Werner Lemberg c6788a389d Fix some potential out-of-memory crashes. 
* src/base/ftobjs.c (ft_glyphslot_done): Check `slot->internal'.
* src/base/ftstream.c (FT_Stream_ReleaseFrame): Check `stream'.
* src/truetype/ttinterp.c (TT_New_Context): Avoid double-free of
`exec' in case of failure.
 2009-06-07 13:09:21 +02:00
Werner Lemberg 1e5e7aa073 Fix SCANCTRL handling in TTFs. 
Problem reported by Alexey Kryukov <anagnost@yandex.ru>.

* src/truetype/ttinterp.c (Ins_SCANCTRL): Fix threshold handling.
 2009-01-25 16:27:04 +00:00
Werner Lemberg 1a5d561dce * src/autofit/afcjk.c, src/base/ftoutln.c, src/base/ftrfork.c, 
src/bdf/bdfdrivr.c, src/gxvalid/gxvmorx.c, src/otvalid/otvmath.c,
src/pcf/pcfdrivr.c, src/psnames/pstables.h, src/smooth/ftgrays.c,
src/tools/glnames.py, src/truetype/ttinterp.c, src/type1/t1load.c,
src/type42/t42objs.c, src/winfonts/winfnt.c: Fix compiler warnings
(Atari PureC).
 2008-11-29 22:50:24 +00:00
Werner Lemberg 105721a5a6 * src/truetype/ttinterp.c (tt_default_graphics_state): The default 
value for `scan_type' is zero, as confirmed by Greg Hitchcock from
Microsoft.  Problem reported by Michal Nowakowski
<miszka@limes.com.pl>.
 2008-11-15 10:35:51 +00:00
Werner Lemberg ce8853af81 * src/truetype/ttinterp. (Ins_SCANTYPE): Don't check rendering mode. 
* src/raster/ftraster.c (Render_Glyph, Render_Gray_Glyph,
Draw_Sweep): No-dropout mode is value 2, not value 0.
(Draw_Sweep): Really skip dropout handling for no-dropout mode.
 2008-06-24 11:19:03 +00:00
Werner Lemberg 5df5dbb722 Enable access to the various dropout rules of the B&W rasterizer. 
Pass dropout rules from the TT bytecode interpreter to the
rasterizer; temporarily this is enabled only if
`USE_SCAN_CONVERSION_RULES' is defined.

* include/freetype/ftimage.h (FT_OUTLINE_SMART_DROPOUTS,
FT_OUTLINE_EXCLUDE_STUBS): New flags for for FT_Outline.

* src/raster/ftraster.c (Vertical_Sweep_Drop, Horizontal_Sweep_Drop,
Horizontal_Gray_Sweep_Drop): Use same mode numbers as given in the
OpenType specification.
Fix mode 4 computation.
(Render_Glyph, Render_Gray_Glyph): Handle new outline flags.

* src/truetype/ttgload.c (TT_Load_Glyph)
[USE_SCAN_CONVERSION_RULES]: Convert scan conversion mode to
FT_OUTLINE_XXX flags.

* src/truetype/ttinterp.c (Ins_SCANCTRL): Enable ppem check.
 2008-06-22 13:40:08 +00:00
Werner Lemberg 7cb9ec0f1c * src/type1/t1parse.h (T1_ParserRec): Make `base_len' and 
`private_len' unsigned.

* src/type1/t1parse.c (read_pfb_tag): Make `asize' unsigned and read
it as such.
(T1_New_Parser, T1_Get_Private_Dict): Make `size' unsigned.


* src/base/ftstream.c (FT_Stream_Skip): Reject negative values.


* src/type1/t1load.c (parse_blend_design_positions): Check `n_axis'
for sane value.
Fix typo.


* src/psaux/psobjs.c (ps_table_add): Check `idx' correctly.


* src/truetype/ttinterp (Ins_SHC): Use BOUNDS() to check
`last_point'.


* src/sfnt/ttload.c (tt_face_load_max_profile): Limit
`maxTwilightPoints'.
 2008-06-09 20:49:29 +00:00
Werner Lemberg d77e72295e * src/truetype/ttinterp.c (Ins_IP): Handle case `org_dist == 0' 
correctly.  This fixes glyphs `t' and `h' of Arial Narrow at 12ppem.
 2008-06-05 22:07:19 +00:00
Werner Lemberg 2b0b4221ab Cosmetic code changes. 2008-05-28 22:17:28 +00:00
Werner Lemberg c94fa6699c * src/truetype/ttinterp.c (Ins_MD): The MD instruction also uses 
original, unscaled input values.  Confirmed by Greg Hitchcock from
Microsoft.
 2008-05-27 23:24:07 +00:00
Werner Lemberg 28464c48a1 * src/truetype/ttinterp.c (Ins_IUP): Check number of points. Fix 
from Savannah bug #22356.
 2008-02-18 20:34:42 +00:00
David Turner 74cc0e9ee4 * src/truetype/ttinterp.c: add missing variable initialization, 
gets rid of Valgrind fixes.

	* src/autofit/aflatin.c: get rid of an infinite loop in the case
	of degenerate fonts.
 2007-06-30 22:54:12 +00:00
Werner Lemberg e12ed563d6 * src/tools/ftrandom.c (font_size): New global variable. 
(TestFace): Use it.
(main): Handle new option `--size' to set `font_size'.
(Usage): Updated.

Formatting.
 2007-06-17 05:31:23 +00:00
David Turner 815911ae2a * src/truetype/ttgload.c (TT_Load_Simple_Glyph): check the well-formedness 
of the contours array when loading a glyph

	* src/truetype/ttinterp.c (Ins_IP): check argument ranges to reject
	bogus operations properly
 2007-06-16 17:07:20 +00:00
Werner Lemberg c793d90fca * src/truetype/ttinterp.c (Null_Vector, NULL_Vector): Removed, 
unused.
 2007-06-01 20:51:11 +00:00
Werner Lemberg 94be20ea82 * src/truetype/ttinterp.c (Ins_IP), src/autofit/aflatin.c 
(af_latin_metrics_scale_dim): Fix compiler warnings.
 2007-05-09 20:02:55 +00:00
David Turner 3b242d3619 last (tiny) fix to the bytecode interpreter and code cleanup 2007-03-26 12:03:04 +00:00
Werner Lemberg c9f6c66f95 formatting 2007-03-21 13:30:14 +00:00
David Turner 64a9ef20d5 another bytecode regression fix. Hopefully, this should be the latest 2007-03-18 07:35:08 +00:00
David Turner 74c34eba39 another bytecode interpreter regression fix 2007-03-18 07:19:31 +00:00
David Turner 89020d9749 fixing TrueType bytecode interpreter regression for HLB_____.TTF, needs more testing with other fonts 2007-03-17 17:48:57 +00:00
Werner Lemberg a091517a04 * src/truetype/ttinterp.c (Ins_MD): Remove unused variable. 
* src/autofit/aflatin.c (af_latin_hints_link_segments): Ditto.
 2007-02-16 08:12:50 +00:00
Werner Lemberg 3cd6cc24f2 formatting 2007-02-16 08:10:17 +00:00
David Turner 2c4500e981 improving TrueType bytecode interpreter to better match Windows behaviour 
on tricky cases... FIX_BYTECODE is now the default to allow large testing
 2007-02-14 15:08:47 +00:00
Werner Lemberg c6a14086d2 * src/truetype/ttinterp.c (Project_x, Project_y): Remove compiler 
warnings.

* src/pcf/pcfread.c (pcf_interpret_style), src/bdf/bdfdrivr.c
(bdf_interpret_style): Ditto.
 2007-02-12 22:08:15 +00:00
Werner Lemberg 406d25f379 more formatting and copyright years 2007-02-12 22:01:18 +00:00
David Turner 72a0dd247d some simplifications of the TrueType interpreter projection code 
(preliminaries to various interpreter fixes)
 2007-02-12 15:24:51 +00:00
Werner Lemberg 6e87ed9f04 Spelling fixes from Alexei. 2007-01-26 22:18:56 +00:00
Werner Lemberg 555258fffe * docs/CHANGES: Document SHZ fix. 
* src/truetype/ttinterp.c (Ins_SHZ): SHZ doesn't move phantom
points.
 2007-01-21 09:46:37 +00:00
Werner Lemberg b4142d5126 Whitespace and spelling fixes from Alexei. 
Formatting, copyright years.
 2007-01-17 12:45:26 +00:00
David Turner 2212272992 * src/autofit/aflatin.c, src/cff/cffdriver.c, src/truetype/ttobjs.c, 
src/truetype/ttinterp.c: fixing compiler warnings
 2007-01-16 20:06:44 +00:00
Werner Lemberg 8c4120d0a3 Fix various compiler warnings. 
* src/truetype/ttdriver.c (tt_size_select), src/cff/cffobjs.h,
src/cff/cffobjs.c (cff_size_request), src/type42/t42objs.h:
s/index/strike_index/.
* src/base/ftobjs.c (FT_Match_Size): s/index/size_index/.

* src/gxvalid/gxvmorx5.c
(gxv_morx_subtable_type5_InsertList_validate): s/index/table_index/.

* src/truetype/ttinterp.c (Compute_Point_Displacement),
src/pcf/pcfread.c (pcf_seek_to_table_type): Avoid possibly
uninitialized variables.
 2007-01-15 06:42:40 +00:00
Werner Lemberg 27cf9de104 formatting, copyright years 2007-01-13 07:34:23 +00:00