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freetype/ChangeLog
Graham Asher e0a9a93330 [smooth] Fix and improve spline flattening. 
This fixes the flattening of cubic, S-shaped curves and speeds up
the handling of both the conic and cubic arcs.

See the discussions on the freetype-devel mailing list in late
August and September 2010 for details.

* src/smooth/ftgrays.c (FT_MAX_CURVE_DEVIATION): New macro.
(TWorker): Remove `conic_level' and `cubic_level' elements.
(gray_render_conic): Simplify algorithm.
(gray_render_cubic): New algorithm; details are given in the code
comments.
(gray_convert_glyph): Remove heuristics.
2010-09-20 09:29:23 +02:00

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2010-09-20 Graham Asher <graham.asher@btinternet.com>
David Bevan <david.bevan@pb.com>
[smooth] Fix and improve spline flattening.
This fixes the flattening of cubic, S-shaped curves and speeds up
the handling of both the conic and cubic arcs.
See the discussions on the freetype-devel mailing list in late
August and September 2010 for details.
* src/smooth/ftgrays.c (FT_MAX_CURVE_DEVIATION): New macro.
(TWorker): Remove `conic_level' and `cubic_level' elements.
(gray_render_conic): Simplify algorithm.
(gray_render_cubic): New algorithm; details are given in the code
comments.
(gray_convert_glyph): Remove heuristics.
2010-09-19 Werner Lemberg <wl@gnu.org>
Minor fixes.
* src/cff/cffload.c (cff_charset_compute_cids): `charset->sids[i]'
is `FT_UShort'.
(cff_index_access_element): Don't use additions in comparison.
* src/sfnt/ttpost.c (load_format_20): Make `post_limit' of type
`FT_Long'.
Don't use additions in comparison.
Improve tracing messages.
(load_format_25, load_post_names): Make `post_limit' of type
`FT_Long'.
2010-09-19 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[cff] Truncate the element length at the end of the stream.
See Savannah bug #30975.
* src/cff/cffload.c (cff_index_access_element): `off2', the offset
to the next element is truncated at the end of the stream to prevent
invalid I/O. As `off1', the offset to the requested element has
been checked by FT_STREAM_SEEK(), `off2' should be checked
similarly.
2010-09-19 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[cff] Ignore CID > 0xFFFFU.
See Savannah bug #30975.
* src/cff/cffload.c (cff_charset_compute_cids): Ignore CID if
greater than 0xFFFFU. CFF font spec does not mention maximum CID in
the font, but PostScript and PDF spec define that maximum CID is
0xFFFFU.
2010-09-19 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[cff] Make trace message in cff_charset_load() verbose.
See Savannah bug #30975.
* src/cff/cffload.c (cff_charset_load): Report the original `nleft'
and truncated `nleft'.
2010-09-19 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[cff] Correct `max_cid' from CID array length to max CID.
See Savannah bug #30975.
* src/cff/cffload.c (cff_charset_compute_cids): Don't increment
max_cid after detecting max CID. The array CFF_Charset->cids is
allocated by max_cid + 1.
(cff_charset_cid_to_gindex): Permit CID is less than or equal to
CFF_Charset->max_cid.
* src/cff/cffobjs.c (cff_face_init): FT_Face->num_glyphs is
calculated as CFF_Charset->max_cid + 1.
2010-09-19 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[truetype] Sanitize the broken offsets in `loca'.
See Savannah bug #31040.
* src/truetype/ttpload.c (tt_face_get_location): If `pos1', the
offset to the requested entry in `glyf' exceeds the end of the
table, return offset=0, length=0. If `pos2', the offset to the next
entry in `glyf' exceeds the end of the table, truncate the entry
length at the end of `glyf' table.
2010-09-19 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[sfnt] Prevent overrunning in `post' table parser.
See Savannah bug #31040.
* src/sfnt/ttpost.c (load_post_names): Get the length of `post'
table and pass the limit of `post' table to load_format_20() and
load_format_25().
(load_format_20): Stop the parsing when we reached at the limit of
`post' table. If more glyph names are required, they are filled by
NULL names.
2010-09-17 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[truetype] Don't duplicate size->twilight structure to be freed.
See Savannah bug #31040 for detail.
* 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.
2010-09-15 Werner Lemberg <wl@gnu.org>
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.
2010-09-14 Werner Lemberg <wl@gnu.org>
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.
2010-09-13 Werner Lemberg <wl@gnu.org>
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'.
2010-08-31 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Ignore the environmental setting of LIBTOOL.
Patch is suggested by Adrian Bunk, to prevent unexpected
reflection of environmental LIBTOOL. See:
http://savannah.nongnu.org/patch/?7290
* builds/unix/unix-cc.in: LIBTOOL is unconditionally set to
$(FT_LIBTOOL_DIR)/libtool. FT_LIBTOOL_DIR is set to $(BUILD_DIR)
by default.
* configure: When configured for the building out of source tee,
FT_LIBTOOL_DIR is set to $(OBJ_DIR).
2010-08-31 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[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().
2010-08-30 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[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.
This fixes Savannah bug #30798, reported by Robert Święcki.
2010-08-29 Werner Lemberg <wl@gnu.org>
[ftraster] Pacify compiler.
* src/raster/ftraster.c (ft_black_new) [_STANDALONE_]: `memory' is
not used.
2010-08-29 Werner Lemberg <wl@gnu.org>
[cff] Allow SIDs >= 65000.
* src/cff/cffload.c (cff_charset_load): Fix change from 2009-03-20:
The threshold for SIDs is not applicable here. I misinterpreted the
`SID values 65000 and above are available for implementation use'
sentence in the CFF specification.
Problem reported by Ivan Ninčić <inincic@pdftron.com>.
2010-08-28 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Force hinting when the font lacks its familyname.
In Type42 or Type11 font embedded in PostScript & PDF, TrueType sfnt
stream may lack `name' table because they are not required. Hinting
for nameless fonts is safer for PDFs including embedded Chinese
fonts. Written by David Bevan, see:
http://lists.gnu.org/archive/html/freetype-devel/2010-08/msg00021.html
http://lists.freedesktop.org/archives/poppler/2010-August/006310.html
* src/truetype/ttobjs.c (tt_check_trickyness): If a NULL pointer by
nameless font is given, TRUE is returned to enable hinting.
2010-08-28 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Register yet another tricky TrueType font.
* src/truetype/ttobjs.c (tt_check_trickyness): Add `HuaTianKaiTi?',
a Kaishu typeface paired with `HuaTianSongTi?' by Huatian
Information Industry.
2010-08-17 Teijo Kinnunen <Teijo.Kinnunen@nuance.com>
Fix Savannah bug #30788.
* src/cache/ftccache.c (FTC_Cache_Clear): Check `cache->buckets' for
NULL too.
2010-08-10 Werner Lemberg <wl@gnu.org>
Try to fix Savannah bug #30717 (and probably #30719 too).
* src/smooth/ftsmooth.c (ft_smooth_render_generic): Add another
overflow test for `width' and `height'.
2010-08-06 Werner Lemberg <wl@gnu.org>
* Version 2.4.2 released.
=========================
Tag sources with `VER-2-4-2'.
* docs/CHANGES: Updated.
* docs/VERSION.DLL: Update documentation and bump version number to
2.4.2
* README, Jamfile (RefDoc),
builds/win32/vc2005/freetype.vcproj, builds/win32/vc2005/index.html,
builds/win32/vc2008/freetype.vcproj, builds/win32/vc2008/index.html,
builds/win32/visualc/freetype.dsp,
builds/win32/visualc/freetype.vcproj,
builds/win32/visualc/index.html, builds/win32/visualce/freetype.dsp,
builds/win32/visualce/freetype.vcproj,
builds/win32/visualce/index.html,
builds/wince/vc2005-ce/freetype.vcproj,
builds/wince/vc2005-ce/index.html,
builds/wince/vc2008-ce/freetype.vcproj,
builds/wince/vc2008-ce/index.html: s/2.4.1/2.4.2/, s/241/242/.
* include/freetype/freetype.h (FREETYPE_PATCH): Set to 2.
* builds/unix/configure.raw (version_info): Set to 12:0:6.
2010-08-06 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Fix Savannah bug #30648.
* src/base/ftobjs.c (FT_Done_Library): Specify the order of font
drivers during the face closing process. Type42 faces should be
closed before TrueType faces, because a Type42 face refers to
another internal TrueType face which is created from sfnt[] array on
the memory.
2010-08-06 Yuriy Kaminskiy <yumkam@mail.ru>
[raster] Fix valgrind warning.
* src/raster/ftraster.c (Decompose_Curve) <default>: Access point[0]
only if we don't hit `limit'.
2010-08-06 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Fix Savannah bug #30658.
* src/base/ftobjs.c (Mac_Read_POST_Resource): Check that the total
length of collected POST segments does not overrun the allocated
buffer.
2010-08-06 Yuriy Kaminskiy <yumkam@mail.ru>
Fix conditional usage of FT_MulFix_i386.
With -ansi flag, gcc does not define `i386', only `__i386__'.
* include/freetype/config/ftconfig.h, builds/unix/ftconfig.in:
s/i386/__i386__/.
2010-08-05 Werner Lemberg <wl@gnu.org>
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'.
2010-08-05 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30656.
* src/type42/t42parse.c (t42_parse_sfnts): Protect against negative
string_size.
Fix comparison.
2010-08-05 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[cff] Don't use any values in decoder after parsing error.
* src/cff/cffgload.c (cff_slot_load): Skip the evaluations
of the values in decoder, if cff_decoder_parse_charstrings()
returns any error.
2010-08-04 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30644.
* src/base/ftstream.c (FT_Stream_EnterFrame): Fix comparison.
2010-08-04 Werner Lemberg <wl@gnu.org>
`make devel' fails if FT_CONFIG_OPTION_OLD_INTERNALS is set.
* devel/ftoption.h: Synchronize with
include/freetype/config/ftoption.h.
2010-08-04 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[cff] Improve stack overflow test.
* src/cff/cffgload.c (cff_decoder_parse_charstrings): Check stack
after execution of operations too.
2010-07-18 Werner Lemberg <wl@gnu.org>
Add reference counters and to FT_Library and FT_Face objects.
* include/freetype/freetype.h (FT_Reference_Face): New function.
* include/freetype/ftmodapi.h (FT_Rererence_Library): New function.
* include/freetype/internal/ftobjs.h (FT_Face_InternalRec,
FT_LibraryRec): New field `refcount'.
* src/base/ftobjs.c (FT_Open_Face, FT_New_Library): Handle
`refcount'.
(FT_Reference_Face, FT_Reference_Library): Implement new functions.
(FT_Done_Face, FT_Done_Library): Handle `refcount'.
* docs/CHANGES: Updated.
2010-07-18 Werner Lemberg <wl@gnu.org>
* Version 2.4.1 released.
=========================
Tag sources with `VER-2-4-1'.
* docs/CHANGES: Updated.
* docs/VERSION.DLL: Update documentation and bump version number to
2.4.1.
* README, Jamfile (RefDoc),
builds/win32/vc2005/freetype.vcproj, builds/win32/vc2005/index.html,
builds/win32/vc2008/freetype.vcproj, builds/win32/vc2008/index.html,
builds/win32/visualc/freetype.dsp,
builds/win32/visualc/freetype.vcproj,
builds/win32/visualc/index.html, builds/win32/visualce/freetype.dsp,
builds/win32/visualce/freetype.vcproj,
builds/win32/visualce/index.html,
builds/wince/vc2005-ce/freetype.vcproj,
builds/wince/vc2005-ce/index.html,
builds/wince/vc2008-ce/freetype.vcproj,
builds/wince/vc2008-ce/index.html: s/2.4.0/2.4.1/, s/240/241/.
* include/freetype/freetype.h (FREETYPE_PATCH): Set to 1.
* builds/unix/configure.raw (version_info): Set to 11:1:5.
2010-07-17 Werner Lemberg <wl@gnu.org>
[cff] Final try to fix `hintmask' and `cntrmask' limit check.
Problem reported by Tobias Wolf <towolf@gmail.com>.
* src/cff/cffgload.c (cff_decoder_parse_charstrings)
<cff_op_hintmask>: Sigh. I'm apparently too silly to fix this
correctly in less than three tries.
2010-07-12 Werner Lemberg <wl@gnu.org>
* Version 2.4.0 released.
=========================
Tag sources with `VER-2-4-0'.
* docs/CHANGES: Updated.
* docs/VERSION.DLL: Update documentation and bump version number to
2.4.0.
* README, Jamfile (RefDoc),
builds/win32/vc2005/freetype.vcproj, builds/win32/vc2005/index.html,
builds/win32/vc2008/freetype.vcproj, builds/win32/vc2008/index.html,
builds/win32/visualc/freetype.dsp,
builds/win32/visualc/freetype.vcproj,
builds/win32/visualc/index.html, builds/win32/visualce/freetype.dsp,
builds/win32/visualce/freetype.vcproj,
builds/win32/visualce/index.html,
builds/wince/vc2005-ce/freetype.vcproj,
builds/wince/vc2005-ce/index.html,
builds/wince/vc2008-ce/freetype.vcproj,
builds/wince/vc2008-ce/index.html: s/2.3.12/2.4.0/, s/2312/240/.
* include/freetype/freetype.h (FREETYPE_MINOR): Set to 4.
(FREETYPE_PATCH): Set to 0.
* builds/unix/configure.raw (version_info): Set to 11:0:5.
2010-07-12 Werner Lemberg <wl@gnu.org>
Remove C++ warnings.
*/*: Initialize pointers where necessary to make g++ happy.
2010-07-12 malc <av1474@comtv.ru>
Richard Henderson <rth@redhat.com>
Fix type-punning issues with C++.
* include/freetype/internal/ftmemory.h (FT_ASSIGNP) [__cplusplus]:
Emulate a `typeof' operator with an inline template which uses
`static_cast'.
2010-07-11 Werner Lemberg <wl@gnu.org>
Fix C++ compilation issue.
* src/tools/apinames.c (names_dump) <OUTPUT_WATCOM_LBC>: Fix
type of `dot' variable.
2010-07-10 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Fix another case reported in Savannah bug #30373.
Permit a face for Type1, Type42 and CFF without charmap,
patch by Tor Andersson.
* src/type1/t1objs.c (T1_Face_Init): Reset the error if it
is FT_Err_No_Unicode_Glyph_Name.
* src/type42/t42objs.c (T42_Face_Init): Ditto.
* src/cff/cffobjs.c (cff_face_init): Ditto.
2010-07-09 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Use defined macros to set {platform,encoding}_id.
* src/bdf/bdfdrivr.c: Include ttnameid.h and use macros to
set charmap.{platfom,encoding}_id.
* src/pcf/pcfdrivr.c: Ditto.
* src/winfonts/winfnt.c: Ditto.
* src/type1/t1objs.c: Ditto.
* src/type42/t42objs.c: Ditto.
* src/cff/cffobjs.c: Ditto.
* src/pfr/pfrobjs.c: Ditto.
2010-07-09 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Fix Savannah bug #30373.
Too serious check of errors by `FT_CMap_New' since 2010-07-04
is fixed. Reported by Tor Andersson.
* include/freetype/fterrdef.h
(PSnames_Err_No_Unicode_Glyph_Name): New error code to
indicate the Unicode charmap synthesis failed because
no Unicode glyph name is found.
* src/psnames/psmodule.c (ps_unicodes_init): Return
PSnames_Err_No_Unicode_Glyph_Name when no Unicode glyph name
is found in the font.
* src/cff/cffcmap.c (cff_cmap_unicode_init): Return
CFF_Err_No_Unicode_Glyph_Name when no SID is available.
* src/type1/t1objs.c (T1_Face_Init): Proceed if `FT_CMap_New'
is failed by the lack of Unicode glyph name.
* src/type42/t42objs.c (T42_Face_Init): Ditto.
* src/cff/cffobjs.c (cff_face_init): Ditto.
2010-07-09 Ken Sharp <ken.sharp@artifex.com>
Make ftraster.c compile in stand-alone mode with MSVC compiler.
* src/raster/ftmisc.h (FT_Int64) [_WIN32, _WIN64]: Fix typedef
since there is no `inttypes.h' for MSVC.
2010-07-08 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30361.
* src/truetype/ttinterp.c (Ins_IUP): Fix bounds check.
2010-07-06 Werner Lemberg <wl@gnu.org>
Pacify compiler.
* src/cff/cffload.c (cff_index_get_pointers): Initialize
`new_bytes'.
2010-07-05 Eugene A. Shatokhin <spectre@ispras.ru>
Fix Savannah bug #27648.
* src/base/ftobjs.c (ft_remove_renderer, FT_Add_Module): Call
`raster_done' only if we have an outline glyph format.
2010-07-05 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30030.
* builds/win32/*/freetype.vcproj: Add ftxf86.c.
2010-07-05 Werner Lemberg <wl@gnu.org>
[cff] Next try to fix `hintmask' and `cntrmask' limit check.
Problem reported by malc <av1474@comtv.ru>.
* src/cff/cffgload.c (cff_decoder_parse_charstrings)
<cff_op_hintmask>: It is possible that there is just a single byte
after the `hintmask' or `cntrmask', e.g., a `return' instruction.
2010-07-04 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Restrict the number of the charmaps in a rogue-compatible mode.
Fix for Savannah bug #30059.
* src/cache/ftccmap.c (FTC_CMapCache_Lookup): Replace `16' the
minimum character code passed by a legacy rogue client by...
* include/freetype/config/ftoption.h (FT_MAX_CHARMAP_CACHEABLE):
This. It is undefined when FT_CONFIG_OPTION_OLD_INTERNALS is
undefined (thus the rogue client compatibility is not required).
* src/cff/cffobjs.c (cff_face_init): Abort the automatic
selection or synthesis of Unicode cmap subtable when the charmap
index exceeds FT_MAX_CHARMAP_CACHEABLE.
* src/sfnt/ttcmap.c (tt_face_build_cmaps): Issue error message
when the charmap index exceeds FT_MAX_CHARMAP_CACHEABLE.
* src/base/ftobjs.c (find_unicode_charmap): When Unicode charmap
is found after FT_MAX_CHARMAP_CACHEABLE, ignore it and search
earlier one.
(find_variant_selector_charmap): When UVS charmap is found after
FT_MAX_CHARMAP_CACHEABLE, ignore it and search earlier one.
(FT_Select_Charmap): When a charmap matching with requested
encoding but after FT_MAX_CHARMAP_CACHEABLE, ignore and search
earlier one.
(FT_Set_Charmap): When a charmap matching with requested
charmap but after FT_MAX_CHARMAP_CACHEABLE, ignore and search
earlier one.
(FT_Get_Charmap_Index): When a requested charmap is found
after FT_MAX_CHARMAP_CACHEABLE, return the inverted charmap
index.
2010-07-04 Werner Lemberg <wl@gnu.org>
TrueType hinting is no longer patented.
* include/freetype/config/ftoption.h, devel/ftoption.h
(TT_CONFIG_OPTION_BYTECODE_INTERPRETER): Define.
(TT_CONFIG_OPTION_UNPATENTED_HINTING): Undefine.
* docs/CHANGES, docs/INSTALL, include/freetype/freetype.h: Updated.
* docs/TRUETYPE, docs/PATENTS: Removed.
2010-07-04 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Check error value by `FT_CMap_New'.
* src/cff/cffobjs.c (cff_face_init): Check error value by
`FT_CMap_New'.
* src/pfr/pfrobjs.c (pfr_face_init): Ditto.
* src/type1/t1jobjs.c (T1_Face_Init): Ditto.
* src/type42/t42jobjs.c (T42_Face_Init): Ditto.
2010-07-03 Werner Lemberg <wl@gnu.org>
Make ftgrays.c compile stand-alone again.
* src/smooth/ftgrays.c [_STANDALONE_]: Include `stddef.h'.
(FT_INT_MAX, FT_PtrDist)[_STANDALONE_]: Define.
2010-07-02 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Additional fix for Savannah bug #30306.
* src/base/ftobjs.c (Mac_Read_POST_Resource): If the type of the
POST fragment is 0, the segment is completely ignored. The declared
length of the segment is not cared at all. According to Adobe
Technical Note 5040, type 0 segment is a comment only and should not
be loaded for the interpreter. Reported by Robert Święcki.
2010-07-01 Werner Lemberg <wl@gnu.org>
[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 Werner Lemberg <wl@gnu.org>
[truetype] Add rudimentary tracing for bytecode instructions.
* src/truetype/ttinterp.c (opcode_name) [FT_DEBUG_LEVEL_TRACE]: New
array.
(TT_RunIns): Trace opcodes.
2010-06-30 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30263.
* src/smooth/ftgrays.c (gray_render_span): Use cast to `unsigned
int' to avoid integer overflow.
* src/smooth/ftsmooth.c (ft_smooth_render_generic): Use smaller
threshold values for `width' and `height'. This is not directly
related to the bug fix but makes sense anyway.
2010-07-01 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Initial fix for Savannah bug #30306.
* src/base/ftobjs.c (Mac_Read_POST_Resource): Check `rlen', the
length of fragment declared in the POST fragment header, and prevent
an underflow in length calculation. Some fonts set the length to
zero in spite of the existence of a following 16bit `type'.
Reported by Robert Święcki.
2010-07-01 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Additional fix for Savannah bug #30248 and #30249.
* src/base/ftobjs.c (Mac_Read_POST_Resource): Check the buffer size
during gathering PFB fragments embedded in LaserWriter PS font for
Macintosh. Reported by Robert Święcki.
2010-06-30 Alexei Podtelezhnikov <apodtele@gmail.com>
Minor optimizations by avoiding divisions.
* src/sfnt/ttkern.c (tt_face_load_kern, tt_face_get_kerning):
Replace divisions with multiplication in comparisons.
2010-06-29 Werner Lemberg <wl@gnu.org>
Fix minor tracing issues.
* src/cff/cffgload.c, src/truetype/ttgload.c: Adjust tracing levels.
2010-06-27 Werner Lemberg <wl@gnu.org>
[cff] Really fix `hintmask' and `cntrmask' limit check.
* src/cff/cffgload.c (cff_decoder_parse_charstrings)
<cff_op_hintmask>: Fix thinko and handle tracing also.
2010-06-27 Werner Lemberg <wl@gnu.org>
Fix valgrind warning.
* src/base/ftoutln.c (FT_Outline_Get_Orientation): Initialize
`result' array.
2010-06-27 Werner Lemberg <wl@gnu.org>
[cff] Fix memory leak.
* src/cff/cffgload.c (cff_operator_seac): Free charstrings even in
case of errors.
2010-06-27 Werner Lemberg <wl@gnu.org>
[cff] Protect against invalid `hintmask' and `cntrmask' operators.
* src/cff/cffgload.c (cff_decoder_parse_charstrings)
<cff_op_hintmask>: Ensure that we don't exceed `limit' while parsing
the bit masks of the `hintmask' and `cntrmask' operators.
2010-06-26 Werner Lemberg <wl@gnu.org>
Fix PFR change 2010-06-24.
* src/pfr/pfrgload.c (pfr_glyph_load_simple): Really protect against
invalid indices.
2010-06-26 Werner Lemberg <wl@gnu.org>
Improve PFR tracing messages.
* src/pfr/pfrgload.c (pfr_glyph_load_rec): Emit tracing messages for
simple and compound glyph offsets.
2010-06-26 Werner Lemberg <wl@gnu.org>
Fix last PFR change.
* src/pfr/pfrobjs.c (pfr_face_init): Fix rejection logic.
2010-06-26 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30262.
* src/sfnt/ttload.c (tt_face_load_maxp): Limit `maxComponentDepth'
arbitrarily to 100 to avoid stack exhaustion.
2010-06-26 Werner Lemberg <wl@gnu.org>
Add some memory checks (mainly for debugging).
* src/base/ftstream.c (FT_Stream_EnterFrame): Exit with error
if the frame size is larger than the stream size.
* src/base/ftsystem.c (ft_ansi_stream_io): Exit with error if
seeking a position larger than the stream size.
2010-06-25 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30261.
* src/pfr/pfrobjs.c (pfr_face_init): Reject fonts which contain
neither outline nor bitmap glyphs.
2010-06-25 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30254.
* src/cff/cffload.c (cff_index_get_pointers): Do sanity check for
first offset also.
2010-06-25 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Initial fix for Savannah bug #30248 and #30249.
* src/base/ftobjs.c (Mac_Read_POST_Resource): Check the error during
reading a PFB fragment embedded in LaserWriter PS font for Macintosh.
Reported by Robert Święcki.
2010-06-24 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30247.
* src/pcf/pcfread.c (pcf_get_metrics): Disallow (invalid) fonts with
zero metrics.
2010-06-24 Graham Asher <graham.asher@btinternet.com>
* src/smooth/ftgrays.c (gray_render_cubic): Fix algorithm.
The previous version was too aggressive, as demonstrated in
http://lists.gnu.org/archive/html/freetype-devel/2010-06/msg00020.html.
2010-06-24 Werner Lemberg <wl@gnu.org>
*/*: Use module specific error names where appropriate.
2010-06-24 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30236.
* src/sfnt/ttcmap.c (tt_face_build_cmaps): Improve check for pointer
to `cmap_table'.
2010-06-24 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30235.
* src/pfr/pfrgload.c (pfr_glyph_load_simple): Protect against
invalid indices if there aren't any coordinates for indexing.
2010-06-24 Werner Lemberg <wl@gnu.org>
[bdf]: Font properties are optional.
* src/bdf/bdflib.c (_bdf_readstream): Use special error code to
indicate a redo operation.
(_bdf_parse_start): Handle `CHARS' keyword here too and pass current
input line to `_bdf_parse_glyph'.
2010-06-23 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30220.
* include/freetype/fterrdef.h
(BDF_Err_Missing_Fontboundingbox_Field): New error code.
* src/bdf/bdflib.c (_bdf_parse_start): Check for missing
`FONTBOUNDINGBOX' field.
Avoid memory leak if there are multiple `FONT' lines (which is
invalid but doesn't hurt).
2010-06-21 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30168.
* src/pfr/pfrgload.c (pfr_glyph_load_compound): Limit the number of
subglyphs to avoid endless recursion.
2010-06-20 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30145.
* src/psaux/psobjs.c (t1_builder_add_contour): Protect against
`outline == NULL' which might happen in invalid fonts.
2010-06-19 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30135.
* src/bdf/bdflib.c (_bdf_list_join): Don't modify value in static
string `empty'.
(_bdf_parse_glyph): Avoid memory leak in case of error.
2010-06-15 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30108.
* src/autofit/afglobal.c (af_face_globals_compute_script_coverage):
Properly mask AF_DIGIT bit in comparison.
2010-06-11 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30106.
Point numbers for FreeType's implementation of hinting masks are
collected before the final number of points of a glyph has been
determined; in particular, the code for handling the `endchar'
opcode can reduce the number of points.
* src/pshinter/pshalgo.c (psh_glyph_find_strong_points): Assure that
`end_point' is not larger than `glyph->num_points'.
2010-06-11 Werner Lemberg <wl@gnu.org>
[cff]: Improve debugging output.
* src/cff/cffgload.c (cff_decoder_parse_charstrings)
<cff_op_hintmask>: Implement it.
2010-06-10 Graham Asher <graham.asher@btinternet.com>
ftgrays: Speed up rendering of small cubic splines.
* src/smooth/ftgrays.c (gray_render_cubic): Implement new,
simplified algorithm to find out whether the spline can be replaced
with two straight lines. See this thread for more:
http://lists.gnu.org/archive/html/freetype-devel/2010-06/msg00000.html
2010-06-09 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30082.
* src/cff/cffgload.c (cff_decoder_parse_charstrings)
<cff_op_callothersubr>: Protect against stack underflow.
2010-06-08 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30053.
* src/cff/cffparse.c (cff_parse_real): Handle border case where
`fraction_length' has value 10.
2010-06-07 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30052.
This bug has been introduced with commit 2415cbf3.
* src/base/ftobjs.c (FT_Get_First_Char, FT_Get_Next_Char): Protect
against endless loop in case of corrupted font header data.
2010-05-26 Werner Lemberg <wl@gnu.org>
Remove unused variable.
Found by Graham.
* src/autofit/afhints.c (af_glyph_hints_reload): Remove unused
variable `first' in first block.
2010-05-22 Werner Lemberg <wl@gnu.org>
Fix various memory problems found by linuxtesting.org.
* src/base/ftgxval.c (FT_TrueTypeGX_Free, FT_ClassicKern_Free),
src/base/ftotval.c (FT_OpenType_Free), src/base/ftpfr.c
(ft_pfr_check): Check `face'.
* src/base/ftobjs.c (FT_Get_Charmap_Index): Check `charmap' and
`charmap->face'.
(FT_Render_Glyph): Check `slot->face'.
(FT_Get_SubGlyph_Info): Check `glyph->subglyphs'.
2010-05-22 Werner Lemberg <wl@gnu.org>
autofit: Remove dead code.
Suggested by Graham.
* src/autofit/afhints.c (af_glyph_hints_compute_inflections):
Removed.
(af_glyph_hints_reload): Remove third argument.
Update all callers.
2010-05-21 Bram Tassyns <bramt@enfocus.be>
Fix Savannah bug #27987.
* src/cff/cffobjs.c (remove_subset_prefix): New function.
(cff_face_init): Use it to adjust `cffface->family_name'.
2010-05-20 Werner Lemberg <wl@gnu.org>
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.
2010-05-18 Hongbo Ni <hongbo@njstar.com>
Apply Savannah patch #7196.
* src/cff/cffgload.c (cff_slot_load): Prevent crash if CFF subfont
index is out of range.
2010-05-11 Werner Lemberg <wl@gnu.org>
* docs/formats.txt: Give pointer to PCF documentation.
Information provided by Alan Coopersmith
<alan.coopersmith@oracle.com>.
2010-05-10 Ken Sharp <ken.sharp@artifex.com>
Fix Savannah bug #29846.
Previously we discovered fonts which used `setcurrentpoint' to set
the initial point of a contour to 0,0. This caused FreeType to
raise an error, because the `setcurrentpoint' operator is only
supposed to be used with the results from an OtherSubr subroutine.
This was fixed by simply ignoring the error and carrying on.
Now we have found a font which uses setcurrentpoint to actually
establish a non-zero point for a contour during the course of a
glyph program. FWIW, these files may be produced by an application
called `Intaglio' on the Mac, when converting TrueType fonts to
Type 1.
The fix allows the new invalid behaviour, the old invalid behaviour
and real proper usage of the operator to work the same way as Adobe
interpreters apparently do.
(t1_decoder_parse_charstrings): Make `setcurrentpoint' use the top
two elements of the stack to establish unconditionally the current x
and y coordinates.
Make the `flex' subroutine handling (OtherSubr 0) put the current
x,y coordinates onto the stack, instead of two dummy uninitialised
values.
2010-04-14 Ken Sharp <ken.sharp@artifex.com>
Fix Savannah bug #29444.
* src/psaux/psobjs.c (t1_builder_start_point): Accept (invalid)
`lineto' immediately after `hsbw', in accordance with Acrobat, GS,
and others.
2010-04-14 Michał Cichoń <thedmd@artifexmundi.com>
Fix Savannah bug #27999.
* src/cache/ftcmanag.c (FTC_Manager_RemoveFaceID): Only remove
selected entry, not all.
2010-04-06 Jonathan Kew <jfkthame@gmail.com>
Add overflow check to `fvar' table.
* src/truetype/ttgxvar.c (TT_Get_MM_Var): Check axis and instance
count.
2010-04-05 Ken Sharp <ken.sharp@artifex.com>
Fix Savannah bug #29335.
* src/raster/ftraster.c (Line_Up): Use slow multiplication to
prevent overflow. This shouldn't have any serious impact on speed,
however.
2010-04-05 Werner Lemberg <wl@gnu.org>
Add new function `FT_Library_SetLcdFilterWeights'.
This is based on code written by Lifter
<http://unixforum.org/index.php?showuser=11691>. It fixes
FreeDesktop bug #27386.
* src/base/ftlcdfil.c (FT_Library_SetLcdFilterWeights): New
function.
* include/freetype/ftlcdfil.h: Updated.
* docs/CHANGES: Updated.
2010-04-01 John Tytgat <John.Tytgat@esko.com>
Fix Savannah bug #29404.
* src/truetype/ttgload.c: Revert change 2752bd1a (check on bit 1
of `head' table of TrueType fonts).
2010-03-14 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Fix `multi build' for Tytgat's CFF driver improvement.
* src/base/cffload.h (cff_index_get_name): Added.
2010-03-12 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Remove duplicated inclusion of `FT_OUTLINE_H' in ftobjs.c.
* src/base/ftobjs.c: Remove 2nd inclusion of `FT_OUTLINE_H'.
2010-03-11 Chris Liddell <chris.liddell@artifex.com>
Fix Savannah bug #27442.
* src/raster/ftraster.c (ft_black_reset): Fix `buffer_size'.
2010-03-09 Werner Lemberg <wl@gnu.org>
Remove unused variable.
Reported by Graham.
* src/cff/cffparse.c (cff_parse_real): Remove `rest'.
2010-03-02 John Tytgat <John.Tytgat@esko.com>
Improve CFF string (especially glyphname) lookup performance.
We do this by avoiding memory allocation and file I/O. This is
Savannah patch #7104.
* src/cff/cfftypes.h: Include PS cmaps service and
FT_INTERNAL_POSTSCRIPT_HINTS_H.
(CFF_SubFontRec): Remove `num_local_subrs'.
(CFF_FontRec): Add `num_strings', `strings', and `string_pool'
fields.
Remove `string_index' and `num_global_subrs' fields.
Use real types instead of `void' for `pshinter' and `psnames' fields.
* src/cff/cffload.c: Don't include PS cmaps service.
(cff_index_get_pointers): Add `pool' parameter which allows to
insert an extra NUL character for each String INDEX entry.
(cff_index_get_name): Make it a local function.
(cff_index_get_string): New function.
(cff_subfont_load): Updated.
(cff_font_load): Initialize `num_strings', `strings', and
`string_pool' fields in the `CFF_FontRec' structure.
(cff_index_get_sid_string): Use `cff_index_get_string' instead of
`cff_index_get_name'.
(cff_font_done): Updated.
* src/cff/cffload.h: Don't include PS cmaps service.
(cff_index_get_string): Added.
(cff_index_get_sid_string): Updated.
* src/cff/cffobjs.c: Don't include PS cmaps service and
FT_INTERNAL_POSTSCRIPT_HINTS_H.
(cff_size_get_globals_funcs, cff_slot_init): Updated.
(cff_face_init): Follow `cff_index_get_name',
`cff_index_get_string', and `cff_index_get_sid_string' changes.
* src/cff/cffcmap.c (cff_sid_free_glyph_name): Removed.
(cff_sid_to_glyph_name): Use `cff_index_get_cid_string'.
(cff_cmap_unicode_init): Updated.
* src/cff/cffdrivr.c: Don't include PS cmap service.
(cff_get_glyph_name): Avoid unnecessary lookup for POSTSCRIPT_CMAPS
service.
(cff_get_glyph_name, cff_ps_get_font_info, cff_get_ros): Follow API
`cff_index_get_sid_string' change.
(cff_get_name_index): Use `cff_index_get_string' instead of
`cff_index_get_name'.
* src/cff/cffgload.c: Don't include FT_INTERNAL_POSTSCRIPT_HINTS_H.
(cff_decoder_init, cff_decoder_prepare): Updated.
2010-02-27 Werner Lemberg <wl@gnu.org>
Simplify code.
Suggested by Behdad.
* src/base/ftobjs.c (FT_Get_First_Char): Don't use a loop since we
call FT_Get_Next_Char anyway if necessary.
2010-02-26 Behdad Esfahbod <behdad@behdad.org>
Improve handling of invalid glyph indices in char->index functions.
* src/base/ftobjs.c (FT_Get_First_Char, FT_Get_Next_Char): Use a
loop.
2010-02-18 Chris Liddell <chris.liddell@artifex.com>
Fix Savannah bug #28905.
Initialize phantom points before calling the incremental interface
to update glyph metrics.
* src/truetype/ttgload.c (tt_get_metrics_incr_overrides)
[FT_CONFIG_OPTION_INCREMENTAL]: New function, split off from...
(tt_get_metrics): This.
Updated.
(load_truetype_glyph): Use tt_get_metrics_incr_overrides.
----------------------------------------------------------------------------
Copyright 2010 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used, modified,
and distributed under the terms of the FreeType project license,
LICENSE.TXT. By continuing to use, modify, or distribute this file you
indicate that you have read the license and understand and accept it
fully.
Local Variables:
version-control: never
coding: utf-8
End:
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