Commit Graph

3658 Commits

Author SHA1 Message Date
Nikolaus Waxweiler
b6fd5bc06c * src/autofit/afloader.c (af_loader_load_g): Implement emboldening. 2015-11-03 10:40:58 +01:00
Nikolaus Waxweiler
bf2ba9e3d4 [autofit] Implement darkening computation function.
This is a crude adaption of the original `cf2_computeDarkening'
function.

* src/autofit/afloader.c (af_intToFixed, af_fixedToInt,
af_floatToFixed): New macros, taken from `cf2fixed.h'.
(af_loader_compute_darkening): New function.
* src/autofit/afloader.h: Updated.
2015-11-02 13:12:34 +01:00
Nikolaus Waxweiler
37c401ac0a [autofit] Add functions to get standard widths for writing systems.
We need the computed standard horizontal and vertical widths for the
emboldening calculation.  This method provides a convenient way to
extract it from writing-system-specific metrics structures, which
all script definitions must implement.

* src/autofit/aftypes.h (AF_WritingSystem_GetStdWidthsFunc): New
function type.
(AF_WritingSystemClassRec): New member `style_metrics_getstdw'.
(AF_DEFINE_WRITING_SYSTEM_CLASS): Updated.

* src/autofit/afcjk.c (af_cjk_get_standard_width): New function.
(af_cjk_writing_system_class): Updated.
* src/autofit/afdummy.c	(af_dummy_writing_system_class): Updated.
* src/autofit/afindic.c (af_cjk_get_standard_width): New function.
(af_indic_writing_system_class): Updated.
* src/autofit/aflatin.c (af_latin_get_standard_width): New function.
(af_indic_writing_system_class): Updated.
* src/autofit/aflatin.c (af_latin_get_standard_width): New function.
(af_indic_writing_system_class): Updated.
2015-11-02 09:32:26 +01:00
Nikolaus Waxweiler
b2a85ad32b [autofit] Extend `AF_FaceGlobalsRec' to hold emboldening data.
* src/autofit/afglobal.h (AF_FaceGlobalsRec): Add fields.

* src/autofit/afglobal.c (af_face_globals_new): Initialize new
fields.
(af_face_globals_free): Reset new fields.
2015-11-02 09:20:32 +01:00
Nikolaus Waxweiler
d682e51062 [autofit] Add stem-darkening properties.
Actual code follows in a later commit.

* include/freetype/ftautoh.h: Document `no-stem-darkening' and
`darkening-parameters'.

* src/autofit/afmodule.h: New fields `no_stem_darkening' and
`darken_params'.

* src/autofit/afmodule.c (af_property_set, af_property_get):
Handle them.
(af_autofitter_init): Initialize them.
2015-11-02 09:06:36 +01:00
Werner Lemberg
6bda921da0 [ftfuzzer] Update README file. 2015-11-02 06:53:48 +01:00
Werner Lemberg
bcf618b256 [ftfuzzer] Add support for multiple files (patch #8779).
Currently, libFuzzer only supports mutation of a single file.  We
circumvent this problem by using an uncompressed tar archive as
multiple-file input for the fuzzer.

This patch enables tests of `FT_Attach_Stream' and AFM/PFM parsing;
a constructed tarball should contain a font file as the first
element, and files to be attached as further elements.

* src/tools/ftfuzzer/ftfuzzer.cc: Include libarchive headers.
(archive_read_entry_data, parse_data): New functions.
(LLVMFuzzerTestOneInput): Updated.

* src/tools/ftfuzzer/ftmutator.cc: New file, providing a custom
mutator for libFuzzer that can mutate tarballs in a sensible way.
2015-11-02 06:50:49 +01:00
Werner Lemberg
40cb1dc3ac Formatting. 2015-10-31 19:08:27 +01:00
Werner Lemberg
57cbb8c148 [sfnt] Fix cmap 14 validation (#46346).
* src/sfnt/ttcmap.c (tt_cmap14_validate): Check limit before
accessing `numRanges' and `numMappings'.
Fix size check for non-default UVS table.
2015-10-31 18:47:26 +01:00
Werner Lemberg
009cc15035 [sfnt] Handle infinite recursion in bitmap strikes (#46344).
* src/sfnt/ttsbit.c (TT_SBitDecoder_LoadFunc,
tt_sbit_decoder_load_bitmap, tt_sbit_decoder_load_byte_aligned,
tt_sbit_decoder_load_bit_aligned, tt_sbit_decoder_load_png): Add
argument for recursion depth.
(tt_sbit_decoder_load_compound): Add argument for recursion depth.
Increase recursion counter for recursive call.
(tt_sbit_decoder_load_image): Add argument for recursion depth.
Check recurse depth.
(tt_face_load_sbit_image): Updated.
2015-10-31 17:52:56 +01:00
Werner Lemberg
4188deacf3 Comments. 2015-10-30 08:07:56 +01:00
Werner Lemberg
02cfd71498 * src/autofit/afhints.c (af_glyph_hints_dump_points): Minor. 2015-10-29 20:50:57 +01:00
Werner Lemberg
fba29fabb3 [pfr] Add some safety guards (#46302).
* src/pfr/pfrload.h (PFR_CHECK): Rename to...
(PFR_CHECK_SIZE): ... this.
(PFR_SIZE): [!PFR_CONFIG_NO_CHECKS]: Define to PFR_CHECK_SIZE.

* src/pfr/pfrload.c (pfr_log_font_count): Check `count'.
(pfr_extra_item_load_kerning_pairs): Remove tracing message.
(pfr_phy_font_load): Use PFR_CHECK_SIZE where appropriate.
Allocate `chars' after doing a size checks.

* src/pfr/pfrsbit.c (pfr_load_bitmap_bits): Move test for invalid
bitmap format to...
(pfr_slot_load_bitmap): ... this function.
Check bitmap size.
2015-10-27 21:04:48 +01:00
Werner Lemberg
4a3fce93c2 [pfr] Formatting, improving comments. 2015-10-27 19:27:39 +01:00
Werner Lemberg
6a19a7d332 [truetype] Fix sanitizing logic for `loca' (#46223).
* src/truetype/ttpload.c (tt_face_load_loca): A thinko caused an
incorrect adjustment of the number of glyphs, most often using far
too large values.
2015-10-26 15:40:22 +01:00
Werner Lemberg
7f00fa6462 [autofit] Improve tracing.
* src/autofit/afhints.c (af_print_idx, af_get_segment_index,
af_get_edge_index): New functions.

(af_glyph_hints_dump_points): Remove unnecessary `|', `[', and `]'.
Add segment and edge index for each point.
Slightly change printing order of some elements.
Don't print `-1' but `--' for missing elements.

(af_glyph_hints_dump_segments, af_glyph_hints_dump_edges): Remove
unnecessary `|', `[', and `]'.
Don't print `-1' but `--' for missing elements.
2015-10-25 10:59:59 +01:00
Werner Lemberg
07f27e1e43 Thinkos and omissions. 2015-10-24 15:22:13 +02:00
Werner Lemberg
6f09011fe6 [sfnt] Sanitize bitmap strike glyph height.
Problem reported by Nikolay Sivov <bunglehead@gmail.com>.

* src/sfnt/ttsbit.c (tt_face_load_strike_metrics): Avoid zero value
for `metrics->height' by applying some heuristics.
2015-10-24 10:10:22 +02:00
Werner Lemberg
e93d326c8b [sfnt, type42] Fix clang compiler warnings.
* src/sfnt/sfobjs.c (sfnt_init_face): Initialize `offset'.

* src/type42/t42parse.c (t42_parse_sfnts): Use proper cast.
2015-10-22 10:17:20 +02:00
Werner Lemberg
f1c93439b9 [cff] Avoid overflow/module arithmetic.
This modifies the addition of subroutine number to subroutine bias
from unsigned to signed, but does not change any results.

* src/cff/cf2ft.c (cf2_initGlobalRegionBuffer,
cf2_initLocalRegionBuffer): Change variable names from (unsigned)
`idx' to (signed) `subrNum', since it is not an index until after
the bias is added.
* src/cff/cf2ft.h: Updated.

* src/cff/cf2intrp.c (cf2_interpT2CharString) <cf2_cmdCALLSUBR>:
Updated similarly.
2015-10-22 10:11:23 +02:00
Werner Lemberg
59ae73fe16 [cid] Better check of `SubrCount' dictionary entry (#46272).
* src/cid/cidload.c (cid_face_open): Add more sanity tests for
`fd_bytes', `gd_bytes', `sd_bytes', and `num_subrs'.
2015-10-22 09:26:00 +02:00
Werner Lemberg
e484d36b2b [base] Pacify compiler (#46266).
* src/base/ftoutln.c (FT_Outline_EmboldenXY): Initialize `in' and
`anchor'.
2015-10-21 20:48:27 +02:00
Werner Lemberg
87fefc594e [type42] Fix heap buffer overflow (#46269).
* src/type42/t42parse.c (t42_parse_sfnts): Fix off-by-one error in
bounds checking.
2015-10-21 20:29:12 +02:00
Dave Arnold
3cfd51233c [cff] Fix limit in assert for max hints.
* src/cff/cf2interp.c (cf2_hintmask_setAll): Allow mask equal to the
limit (96 bits).
2015-10-21 14:07:25 +02:00
Werner Lemberg
3066f5f53d Revert erroneously applied commits. 2015-10-21 14:05:41 +02:00
Dave Arnold
748e368173 [cff] Remove an assert (#46107).
* src/cff/cf2hints.c (cf2_hintmap_insertHint): Ignore paired edges
in wrong order.
2015-10-21 13:58:43 +02:00
Werner Lemberg
e6593389cf [sfnt] Avoid unnecessarily large allocation for WOFFs (#46257).
* src/sfnt/sfobjs.c (woff_open_font): Use WOFF's `totalSfntSize'
only after thorough checks.
Add tracing messages.
2015-10-21 08:04:29 +02:00
Werner Lemberg
649ca5562d [type42] Better check invalid `sfnts' array data (#46255).
* src/type42/t42parse.c (t42_parse_sfnts): Table lengths must be
checked individually against available data size.
2015-10-21 07:01:45 +02:00
Werner Lemberg
3eccc3a3f8 [cid] Add a bunch of safety checks.
* src/cid/cidload.c (parse_fd_array): Check `num_dicts' against
stream size.
(cid_read_subrs): Check largest offset against stream size.
(cid_parse_dict): Move safety check to ...
(cid_face_open): ... this function.
Also test length of binary data and values of `SDBytes',
`SubrMapOffset', `SubrCount', `CIDMapOffset', and `CIDCount'.
2015-10-20 22:31:57 +02:00
Werner Lemberg
d47d372c96 [cid] Avoid segfault with malformed input (#46250).
* src/cid/cidload.c (cid_read_subrs): Return a proper error code for
unsorted offsets.
2015-10-20 12:24:36 +02:00
Werner Lemberg
3c582060b2 * src/type1/t1afm.c (T1_Read_Metrics): Fix memory leak (#46229). 2015-10-20 06:57:28 +02:00
Bungeman
ba8a528b19 [cid] Better handle invalid glyph stream offsets (#46221).
* src/cid/cidgload.c (cid_load_glyph): Check minimum size of glyph
length.
2015-10-19 23:27:06 +02:00
Werner Lemberg
24cee3a8a3 [psaux] Fix tracing of negative numbers.
Due to incorrect casting negative numbers were shown as very large
(positive) integers on 64bit systems.

* src/psaux/t1decode.c (t1_decoder_parse_charstrings) <op_none>:
Use division instead of shift.
2015-10-19 23:00:28 +02:00
Werner Lemberg
5179c89f61 Comments. 2015-10-19 08:49:25 +02:00
Werner Lemberg
dcfc4d9c21 [truetype] Better protection against malformed `fpgm' (#46223).
* src/truetype/ttobjs.c (tt_size_init_bytecode): Don't execute a
malformed `fpgm' table more than once.
2015-10-18 16:47:06 +02:00
Werner Lemberg
7643b5839b * src/cid/cidgload.c (cid_load_glyph): Fix memory leak.
Reported by Kostya Serebryany <kcc@google.com>.
2015-10-17 15:51:29 +02:00
Werner Lemberg
b185747dd6 [bdf] Prevent memory leak (#46217).
* src/bdf/bdflib.c (_bdf_parse_glyphs) <STARTCHAR>: Check
_BDF_GLYPH_BITS.
2015-10-17 14:21:41 +02:00
Werner Lemberg
797ca5acb5 Typo. 2015-10-17 11:57:16 +02:00
Werner Lemberg
e1ca18d449 [bdf] Use stream size to adjust number of glyphs.
* src/bdf/bdflib.c (ACMSG17): New message macro.
(_bdf_parse_t): Add member `size'.
(bdf_load_font): Set `size'.
(_bdf_parse_glyphs): Adjust `cnt' if necessary.
2015-10-17 11:51:27 +02:00
Werner Lemberg
0af21dcf13 * src/cid/cidload.c (cid_parse_dict): Check `[FG]DBytes' size. 2015-10-17 09:29:52 +02:00
Werner Lemberg
38a3dd5566 Typo. 2015-10-17 09:15:37 +02:00
Werner Lemberg
0ba98da472 * src/cid/cidgload.c (cid_glyph_load): Check file offsets (#46222). 2015-10-17 09:11:02 +02:00
Werner Lemberg
8edfcbed53 [psaux] Fix heap buffer overflow (#46221).
* src/psaux/t1decode.c (t1_decoder_parse_charstring) <operator 12>:
Fix limit check.
2015-10-17 08:11:16 +02:00
Werner Lemberg
a5ecfb4ce6 * src/cid/cidload.c (cid_parse_dict): Handle invalid input (#46220). 2015-10-17 06:15:55 +02:00
Kostya Serebryany
266976b163 add src/tools/ftfuzzer/README 2015-10-15 22:15:53 -07:00
Bungeman
65d8980491 [bdf] Fix memory leak (#46213).
* src/bdf/bdflib.c (bdf_load_font): Always go to label `Fail' in
case of error.
2015-10-15 23:50:16 +02:00
Werner Lemberg
24a1fcdfce [truetype] Add TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES (#46208).
* devel/ftoption.h, include/freetype/config/ftoption.h
(TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES): New configuration macro.

* src/truetype/ttinterp.c (MAX_RUNNABLE_OPCODES): Removed.
(TT_RunIns): Updated.
2015-10-15 21:50:15 +02:00
Werner Lemberg
837ad9d411 * src/truetype/ttinterp.c (TT_RunIns): Fix bytecode stack tracing.
The used indices were off by 1.
2015-10-15 21:15:45 +02:00
Werner Lemberg
8b76eaf092 * src/tools/ftfuzzer/ftfuzzer.cc: Handle fixed sizes (#46211). 2015-10-15 18:28:43 +02:00
Werner Lemberg
e03214e166 [base] Compute MD5 checksums only if explicitly requested.
This improves profiling accuracy.

* src/base/ftobjs.c (FT_Render_Glyph_Internal): Implement it.
2015-10-15 16:58:13 +02:00