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128 Commits

Author SHA1 Message Date
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
David Turner e3654532ea * src/base/ftbitmap.c: fixing memory stomping bug in the 
bitmap embolderner when the pitch of the source bitmap is
        *much* larger than its width

        * src/truetype/ttinterp.c: fixing aliasing-related compilation
        warning
 2007-01-13 00:19:18 +00:00
Werner Lemberg 2bad8ffbdf cosmetics 2006-11-22 09:37:03 +00:00
Werner Lemberg 82ee38e585 formatting 2006-11-20 09:19:26 +00:00
David Turner 7bab6ae3e9 * src/truetype/ttinterp.c: undefined the FIX_BYTECODE macro, 
since the interpreter "enhancements" are still too buggy for
      general use
 2006-11-13 11:25:06 +00:00
David Turner 6aa260ce61 support for "automatic unpatented hinting" added 
we still need to determine the list of "trick" CJK fonts
that are going to toggle the bytecode interpreter instead
of the auto-hinter
 2006-08-25 22:45:13 +00:00
Werner Lemberg 1234299620 formatting 2006-08-19 11:18:09 +00:00
David Turner 33f5f24957 * include/freetype/internal/ftgloadr.h, 
include/freetype/internal/tttypes.h, src/base/ftgloadr.c,
    src/base/ftobjs.c, src/truetype/ttgload.c, src/truetype/ttinterp.c,
    src/truetype/ttobjs.c: improvements to native TrueType hinting,
    this is a first try, controlled by the FIX_BYTECODE macro in
    src/truetype/ttinterp.c
 2006-08-16 16:50:55 +00:00
Werner Lemberg a2da05c2c5 Fix two hinting bugs as reported in 
http://lists.nongnu.org/archive/html/freetype-devel/2006-06/msg00057.html.

* include/freetype/internal/tttypes.h (TT_GlyphZoneRec): Add
`first_point' member.

* src/truetype/ttgload.c (tt_prepare_zone): Initialize
`first_point'.
(TT_Process_Composite_Glyph): Always untouch points.

* src/truetype/ttinterp.c (Ins_SHC): Fix computation of
`first_point' and `last_point' in case of composite glyphs.
(Ins_IUP): Fix computation of `end_point'.
 2006-06-25 06:27:27 +00:00
Werner Lemberg 8e6f8c4d79 Formatting, copyright years, documentation improvements. 2006-02-17 08:07:09 +00:00