for an upcoming 2.2.2 release
* include/freetype/ftlcdfil.h, src/freetype/ftlcdfil.c:
added a new API to support color filtering of subpixel glyph
bitmaps. In default build, the function FT_Library_SetLcdFilter
returns FT_Err_Unimplemented_Feature; you need to #define
FT_CONFIG_OPTION_SUBPIXEL_RENDERING in ftoption.h to compile
the real implementation
* src/smooth/ftsmooth.c: adding support for sub-pixel color
filtering; simplifying a few function calls
* include/freetype/config/ftheader.h: adding FT_LCD_FILTER_H
macro that points to <freetype/ftlcdfil.h>
I. IMPORTANT BUG FIXES
- Various integer overflows have been fixed.
- PFB fonts with MacOS resource fork weren't handled correctly on
non-MacOS platforms.
- The PCF font loarder has been seriously hardened against malformed
font files.
II. IMPORTANT CHANGES
- the unpatented hinter is now part of the default build of the
library, and we added code to automatically support "tricky"
fonts that need it.
what this means is that FreeType should "just work" with certain
Asian fonts, like MingLiu, which cannot properly load without a
bytecode interpreter, but fortunately do not use any of the
patented bytecode opcodes.
Note that the API didn't change, so you can still force
unpatented hinting with a special parameter to FT_Open_Face
as well.
if you're an embedded systems developer, you might want to
*disable* the feature to save code space by undefining
TT_CONFIG_OPTION_UNPATENTED_HINTING in ftoption.h.
- LCD-optimized rendering is now disabled in all default builds
of the library, mainly due to patent reasons. For more information
see:
http://lists.gnu.org/archive/html/freetype/2006-09/msg00064.html
a new configuration macro FT_CONFIG_OPTION_SUBPIXEL_RENDERING has
been introduced in ftoption.h; manually define it in this file
if you want to re-enable the feature.
the change only affects the implementation, not the FreeType API.
This means that clients don't need to be modified, because the
library still generates LCD decimated bitmaps, but with the added
constraint that R=G=B on each triplet.
- Some computation bugs in the TrueType bytecode interpreter were found,
which allow us to get rid of very subtle and rare differences we had
with the Windows renderer.
III. MISCELLANEOUS
- TrueType glyph loading is now about 25% faster.
- the anti-aliased rasterizer has been optimized and is now 15% to 25%
percent faster than the previous one, depending on content
- the Type 1 loader has been improved; as an example, it now skips
over top-level dictionaries properly
======================================================================
which report their English names through an Apple Roman
(platform,encoding) pair, with language_id != English
if the font uses another name entry with language_id == English,
it will be selected correctly though.
* src/truetype/ttobjs.c: add unpatent-hinting selection for
"mingli.ttf"
values which have the upper two bytes set to 0xFF instead of 0xFF
(as it happens in at least two CJKV fonts, `HAN NOM A.ttf' and
`HAN NOM B.ttf').
* src/smooth/ftgrays.c [GRAYS_USE_GAMMA]: Really remove all code.
Formatting.
Fix miscellaneous compiler warnings.
* freetype2/include/freetype/internal/ftobjs.h: close
comment with `*/' to avoid `/* in comment' compiler warning.
* freetype2/src/base/ftdbgmem.c (ft_mem_table_get_source): Turn
cast `(FT_UInt32)(void*)' into `(FT_UInt32)(FT_PtrDist)(void*)'
since on 64-bit platforms void* is larger than FT_UInt32.
* freetype2/src/base/ftobjs.c (t_validator_error): cast
away volatileness of argument to ft_longjmp. Spotted by
Werner `Putzfrau' Lemberg.
* freetype2/src/bdf/bdflib.c (bdf_load_font): initialize
local variable `lineno'.
* freetype2/src/gxvalid/gxvmod.c (classic_kern_validate):
mark local variable `error' volatile.
Fix for previous commit, which caused many compiler warnings/errors
about addresses of volatile objects passed as function arguments
as non-volatile pointers.
* freetype2/include/freetype/internal/ftvalid.h: Make
FT_Validator typedef a pointer to a volatile object.
* freetype2/src/gxvalid/gxvmod.c (gxv_load_table): Make function
argument `table' a pointer to a volatile object.
* freetype2/src/otvalid/otvmod.c (otv_load_table): Make function
argument `table' a pointer to a volatile object.
* freetype2/src/gxvalid/gxvmod.c (GXV_TABLE_DECL): Mark local
variable `_sfnt' as volatile since it must keep its value across
a call to ft_setjmp.
(gxv_validate): Same for local variables `memory' and `valid'.
(classic_kern_validate): Same for local variables `memory',
`ckern', and `valid'.
* freetype2/src/otvalid/otvmod.c (otv_validate): Same for function
parameter `face' and local variables `base', `gdef', `gpos', `gsub',
`jstf', and 'valid'.
* freetype2/src/sfnt/ttcmap.c (tt_face_build_cmaps): Same for
local variable `cmap'.
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
add T1_TOKEN_TYPE_KEY. (struct T1_FieldRec_) add `dict'. Add macros
T1_FIELD_DICT_FONTDICT and T1_FIELD_DICT_PRIVATE. Change T1_NEW_XXX and
T1_FIELD_XXX macros to take the dictionary where the PS keywords is
expected as an additional argument.
* freetype2/src/cid/cidload.c: (T1_FieldRec): Adjust invocations
of T1_FIELD_XXX.
* freetype2/src/cid/cidtoken.h: Adjust invocations of T1_FIELD_XXX.
* freetype2/src/psaux/psobjs.c: Add macro FT_COMPONENT for tracing.
(ps_parser_to_token): Report a PostScript key as T1_TOKEN_TYPE_KEY
instead as T1_TOKEN_TYPE_ANY. (ps_parser_load_field): Make sure a token
that should be a string or name is a string or name indeed. Avoid
memory leak if a keyword has been already encountered and its value
is overwritten.
* freetype2/src/type1/t1load.c: (T1_FieldRec): Adjust invocations of
T1_FIELD_XXX. (parse_dict): Ignore keywords that occur in the wrong
dictionary (e.g., in Private instead of FontDict).
* freetype2/src/type1/t1tokens.h: Adjust invocations of T1_FIELD_XXX.
`t1_decoder_init' and let the caller of `t1_decoder_init' take care
of it.
Call the finisher for T1_Decoder in `cid_face_compute_max_advance'
and `T1_Compute_Max_Advance'.
* freetype2/include/freetype/internal/psaux.h (T1_DecoderRec):
Remove field `face', add `len_buildchar'.
* freetype2/include/freetype/internal/t1types.h (T1_FaceRec): Add
field `buildchar'.
* freetype2/src/cid/cidgload.c (cid_face_compute_max_advance): Call
finisher for T1_Decoder.
(cid_slot_load_glyph): Do not ignore failure when initializing the
T1_Decoder.
* freetype2/src/psaux/t1decode.c (t1_decoder_parse_charstrings):
Updated.
(t1_decoder_init): Remove initialization of fields `buildchar' and
`len_buildchar'.
(t1_decoder_done): Remove deallocation of field `buildchar'.
* freetype/src/type1/t1gload.c (T1_Compute_Max_Advance): Initialize
T1_Decoder's `buildchar' and `len_buildchar'; call finisher for
T1_Decoder.
(T1_Load_Glyph): Initialize T1_Decoder's `buildchar' and
`len_buildchar'; make sure to call finisher for T1_Decoder even in
case of error.
* freetype2/src/type1/t1load.c (T1_Open_Face): Allocate new field
`buildchar' of T1_FaceRec.
* freetype2/src/type1/t1objs.c (T1_Face_Done): Free new field
`buildchar' of T1_FaceRec.
IS_PS_NEWLINE, IS_PS_SPACE, IS_PS_SPECIAL, IS_PS_DELIM, IS_PS_DIGIT,
IS_PS_XDIGIT, and IS_PS_BASE85 (from freetype2/src/psaux/psconv.h).
(T1_FieldLocation): Add T1_FIELD_LOCATION_LOADER,
T1_FIELD_LOCATION_FACE, and T1_FIELD_LOCATION_BLEND.
(T1_DecoderRec): New fields `buildchar' and `face'.
(IS_PS_TOKEN): New macro.
* freetype2/include/freetype/internal/t1types.h (T1_FaceRec): New
fields `ndv_idx', `cdv_idx', and `len_buildchar'.
* freetype2/include/freetype/t1tables.h (PS_BlendRec): New fields
`default_design_vector' and `num_default_design_vector'.
* freetype2/src/psaux/psconv.h: Move macros IS_PS_NEWLINE,
IS_PS_SPACE, IS_PS_SPECIAL, IS_PS_DELIM, IS_PS_DIGIT, IS_PS_XDIGIT,
and IS_PS_BASE85 to freetype2/include/freetype/internal/psaux.h.
* freetype2/src/psaux/psobjs.c (ps_parser_to_token_array): Allow
`token' argument to be NULL if we want only to count the number of
tokens.
(ps_tocoordarray): Allow `coords' argument to be NULL if we just
want to skip the array.
(ps_tofixedarray): Allow `values' argument to be NULL if we just
want to skip the array.
* freetype2/src/psaux/t1decode.c (t1_decoder_parse_charstrings): Add
support for (partially commented out) othersubrs 19-25, 27, and 28.
(t1_decoder_init): Initialize new fields `face' and `buildchar'.
(t1_decoder_done): Release new field `buildchar'.
* freetype2/src/type1/t1load.c (parse_buildchar, parse_private): New
functions.
(t1_keywords): Register them.
(t1_allocate_blend): Updated.
(t1_load_keyword): Handle field types T1_FIELD_LOCATION_LOADER,
T1_FIELD_LOCATION_FACE and T1_FIELD_LOCATION_BLEND.
(parse_dict): Remove `keyword_flags' argument.
Use new macro IS_PS_TOKEN.
Changed function so that later PostScript definitions override
earlier ones.
(t1_init_loader): Initialize new field `keywords_encountered'.
(T1_Open_Face): Initialize new fields `ndv_idx', `cdv_idx', and
`len_buildchar'.
Remove `keywords_flags'.
* freetype2/src/type1/t1load.h (T1_LoaderRect): New field
`keywords_encountered'.
(T1_PRIVATE, T1_FONTDIR_AFTER_PRIVATE): New macros.
* freetype2/src/type1/t1tokens.h [!T1_CONFIG_OPTION_NO_MM_SUPPORT]:
New entries for parsing /NDV, /CDV, and /DesignVector.
* src/pcf/pcfdrivr.c (PCF_Face_Done): Protect against NULL pointers.
(PCF_Face_Init): Add calls to PCF_Face_Done in case of errors.
* src/pcf/pcfread.c (pcf_read_TOC): Protect against malformed table
data and check that tables don't overlap (using a simple
bubblesort).
(PCF_METRIC_SIZE, PCF_COMPRESSED_METRIC_SIZE, PCF_PROPERTY_SIZE):
New macros which give the size of data structures in the data
stream.
(pcf_get_properties): Use rough estimates to get array size limits.
Assign `face->nprops' and `face->properties' earlier so that a call
to PCF_Face_Done can do the clean-up in case of error.
Protect against invalid string offsets.
(pcf_get_metrics): Clean up code.
Adjust tracing message levels.
Use rough estimate to get array size limit.
(pcf_get_bitmaps): Clean up code.
Adjust tracing message levels.
Use rough estimates to get offset limits.
(pcf_get_encodings): Adjust tracing message level.
(pcf_get_accel): Clean up code.
(t1_decoder_parse_charstrings): Operator with
opcode 15 pops its two arguments.
Handle the case where the pops of an othersubr may be part of a
subroutine.
Handle unknown othersubrs gracefully: count their operands and let
the following pop operators push the operands as the results onto
the Type1 stack.
Improve handling of setcurrentpoint opcode.
for a `Simplified Parser'. This makes the parser more robust as it
doesn't poke around in PostScript code. Additionally, it makes the
FontDirectory hackery in src/type1/t1load.c unnecessary.
* src/psaux/psobjs.c (IS_OCTAL_DIGIT): New macro.
(skip_literal_string): Add FT_Error as return value.
Handle escapes better.
(skip_string): Add FT_Error as return value.
Don't set `parser->error' but return error code directly.
(skip_procedure): New function.
(ps_parser_skip_PS_token): Handle procedures.
Update code.
(ps_parser_to_token): Update code.
(ps_parser_load_field_table): Handle bbox entries also.
* src/type1/t1load.c (parse_dict): Remove FontDirectory hackery.
Add commented-out code for synthetic fonts.
src/psaux/t1cmap.c, src/psnames/psmodule.c: Fix for the memory
leak described in bug #16759.
We change 'ps_unicodes_init' so that it also takes a 'free_glyph_name'
callback to release the glyph names returned by 'get_glyph_name'
of 'face->num_glyphs' which missed the last glyph, due to
the offset-by-1 computation, since the PFR format doesn't
guarantee that glyph index 0 corresponds to the "missing
glyph"
should fix bug #16668
