* include/freetype/internal/psaux.h, src/psaux/psobjs.{c,h}: Rearrange
ps_builder_init arguments to conventional order.
* src/psaux/psft.c (cf2_decoder_parse_charstrings): Add a check and
notice for SubFont in Type 1 mode.
As the former only contains a single procedure, move it into `psobjs' for
simplicity. Also change the parameter order to the conventional one.
* src/psaux/psdecode.c (ps_decoder_init): Moved to...
* src/psaux/psobjs.c: ...Here.
* src/psaux/psdecode.h, src/psaux/psobjs.h: Ditto.
* include/freetype/internal/psaux.h: Update function signature.
* src/cff/cffgload.c, src/cid/cidgload.c, src/type1/t1gload.c: Update calls.
* src/psaux/psaux.c, src/psaux/psauxmod.c: Update includes.
* src/psaux/Jamfile, src/psaux/rules.mk: Update file references.
Change t1_make_subfont to take in the Private dict record as an argument.
This is because Type 1 and CID font records in FreeType have this in different
places.
* src/psaux/psobjs.c (t1_make_subfont): Change T1_Face to FT_Face so that
CID is also accepted.
Take PS_Private as an argument and let caller figure out where the Private
dict actually is.
Update references.
* include/freetype/internal/psaux.h, src/psaux/psobjs.h: Update declaration.
* src/type1/t1gload.c (T1_Parse_Glyph_And_Get_Char_String): Update call.
Synthesize a SubFont object for Type 1 fonts. This is used in the interpreter
to access Private dict data, which are stored in different places for Type 1
and CFF. This allows the same data to be used in either mode.
* src/psaux/psobjs.c (t1_make_subfont): New procedure to copy required values
to a dummy CFF_SubFont object. This is similar to cff_make_private_dict.
* src/psaux/psobjs.h: Add the new declaration.
* include/freetype/internal/psaux.h, src/psaux/psauxmod.c: Ditto.
Add this to the PSAux Service for future use with CID fonts.
* src/type1/t1gload.c: Add the call.
Move CF2_Font instance to PS_Decoder. This is the context for the interpreter
and since it is currently stored in CFF_Font, is unavailable in Type 1 mode.
* include/freetype/internal/psaux.h (T1_Decoder, PS_Decoder): Add the
cf2_instance field.
* src/psaux/psdecode.c (ps_decoder_init): Copy cf2_instance to PS_Decoder.
Remove unused line.
* src/psaux/t1decode.c (t1_decoder_done): Add finalization code.
* src/psaux/psft.c: Update accesses.
Add the callback and some conditionals to switch between the two
engines.
* include/freetype/internal/psaux.h (T1_Decoder_FuncsRec): Change
function declarations.
* src/psaux/psauxmod.c: Register the callbacks.
* src/psaux/psobjs.c: Add conditionals for number conversion.
* src/type1/t1gload.c: Add code to choose which renderer to use.
* src/cid/cidgload.c: Update call.
* src/base/ftobjs.c, src/psaux/psobjs.c, src/type1/t1gload.c: Update
includes.
Use the previously changed PS_Driver in type1 module to store hinting
engine configuration.
* include/freetype/ftt1drv.h: New file.
Duplicate and rename config options from CFF.
* include/freetype/config/ftheader.h: Define the new file.
* src/type1/t1driver.c: Update declaration.
* src/type1/t1objs.c (T1_Driver_Init): Added.
This is so that we can use the same hinting engine parameters for Type 1.
* include/freetype/internal/cffotypes.h (CFF_Driver): Renamed to PS_Driver...
* include/freetype/internal/psaux.h: ...and moved to here.
* src/cff/cffdrivr.c, src/cff/cffgload.c, src/cff/cffload.c, src/cff/cffobjs.c,
src/cff/cffobjs.h, src/psaux/psft.c, src/psaux/psobjs.c: Updated references.
Make some fields more generic, so that we can access them the same way
regardless of Type 1 or CFF.
* include/freetype/internal/psaux.h (PS_Builder): Change TT_Face to FT_Face.
Remove unused fields.
* src/psaux/psft.c: Update all accesses of PS_Builder.face.
Add some asserts to guard against casting T1_Face as TT_Face.
* src/type1/t1objs.h (T1_GlyphSlot): Reorder fields to follow CFF_GlyphSlot,
so that we can pretend they are the same in the interpreter.
* src/psaux/psobjs.c: Updated with above changes.
* include/freetype/internal/psaux.h, src/psaux/psauxmod.c: Fix switching
between new and old engines.
* src/cff/cffgload.c, src/cff/cffparse.c: Update calls.
* src/psaux/psblues.c, src/psaux/psfont.c, src/psaux/psfont.h,
src/psaux/psft.c, src/psaux/psft.h, src/psaux/psintrp.c: Update all
to use new objects.
Make the new objects copy over values. They are essentially wrapper types
for the different decoders/builders.
* include/freetype/internal/psaux.h: Update declarations.
Add is_t1 flag to PS_Builder.
* src/psaux/psdecode.h, src/psaux/psobjs.h: Update declarations.
* src/psaux/psdecode.c, src/psaux/psobjs.c: Implement copy with two modes.
* src/psaux/psauxmod.c: Add builder and decoder functions to PSAux service.
Introduce PS_Decoder and PS_Builder which include all fields from either
Type 1 or CFF decoders/builders.
* include/freetype/internal/psaux.h: Added new structs.
* src/psaux/psobjs.c, src/psaux/psobjs.h: Added PS_Builder functions.
* src/psaux/psdecode.c, src/psaux/psdecode.h: New file to hold decoder
initialization functions.
* src/psaux/psaux.c, src/psaux/Jamfile, src/psaux/rules.mk: Updated.
NOTE: Does not compile!
Minor fix to allow both `cff' and `psaux' to use cff_random.
* src/cff/cffload.c (cff_random): Moved to...
* src/psaux/psobjs.c: Here.
* src/cff/cffload.h: Move corresponding declaration to src/psaux/psobjs.h.
* include/freetype/internal/psaux.h (PSAux_ServiceRec): Register the function here...
* src/psaux/psauxmod.c: And here.
* src/cff/cffload.c, src/psaux/cf2intrp.c: Updated code.
NOTE: Does not compile!
This is so that the CFF functions moved to `psaux' can access the same
structs that they need.
* src/cff/cfftypes.h: Moved to...
* include/freetype/internal/cfftypes.h: Here.
* src/cff/cffobjs.h: Moved the struct declarations to...
* include/freetype/internal/cffotypes.h: Here.
* include/freetype/internal/internal.h: Added defines for cfftypes.h and
cffotypes.h
* src/cff/cffcmap.h, src/cff/cffdrivr.c, src/cff/cffgload.c,
src/cff/cffgload.h, src/cff/cffload.h, src/cff/cffobjs.c,
src/cff/cffobjs.h, src/cff/cffparse.h, src/psaux/psobjs.h,
include/freetype/internal/psaux.h,
include/freetype/internal/services/svcfftl.h: Update includes.
* src/cff/rules.mk: Updated.
NOTE: Does not compile!
This is to allow CFF functions moved to `psaux' to call functions declared in src/cff/cffload.h.
* include/freetype/internal/services/svcfftl.h: Create new FT_Service_CFFLoad service.
* include/freetype/internal/ftserv.h: Added new macro FT_DEFINE_SERVICEDESCREC10.
Added define for new service header.
* src/cff/cffdrivr.c, src/cff/cffpic.h: Register the new service.
* src/cff/cfftypes.h (CFF_FontRec), src/psaux/cf2font.h (CF2_FontRec): Add service interface.
* src/cff/cffobjs.c, src/psaux/cf2font.c, src/psaux/cf2ft.c, src/psaux/cf2intrp.c, src/psaux/cffdecode.c: Use the new service.
NOTE: Does not compile!
* include/freetype/internal/psaux.h: Add function pointer declarations.
* src/psaux/cffdecode.c (cff_decoder_init): Updated to take in callbacks.
* src/psaux/cffdecode.h: Ditto.
* src/cff/cffgload.c (cff_compute_max_advance, cff_slot_load): Update calls to pass in callbacks.
* src/psaux/cf2ft.c, src/psaux/cffdecode.c: Use them.
NOTE: Does not compile!
* include/freetype/internal/psaux.h: Add declarations for new function tables.
Minor fix for forward declaration of CFF_Builder.
* src/psaux/psauxmod.c: Update the interface.
* include/freetype/internal/tttypes.h (TT_FaceRec): Add service interface to CFF_Face(TT_Face).
* src/cff/cffgload.c, src/cff/cffobjs.c, src/cff/cffparse.c: Update function calls to use psaux service.
NOTE: Does not compile!
* src/cff/cffgload.c (cff_builder_{init,done,add_point,add_point1,add_contour,start_point,close_contour}, cff_check_points): Moved to...
* src/psaux/psobjs.c: Here.
* src/cff/cffgload.h: Moved corresponding declarations to src/psaux/psobjs.h.
* src/cff/cffgload.h (CFF_Builder): Moved struct declaration to...
* include/freetype/internal/psaux.h: Here.
NOTE: Does not compile!
* src/cff/cffgload.c (CFF_Operator,
CFF_COUNT_{CHECK_WIDTH,EXACT,CLEAR_STACK}, cff_argument_counts,
cff_operator_seac, cff_compute_bias, cff_lookup_glyph_by_stdcharcode,
cff_decoder_{parse_charstrings,init,prepare}): Moved to...
* src/psaux/cffdecode.c: This new file.
* src/cff/cffgload.h: Moved corresponding declarations to...
* src/psaux/cffdecode.h: This new file.
* src/cff/cffgload.h (CFF_MAX_{OPERANDS,SUBRS_CALLS,TRANS_ELEMENTS},
CFF_Decoder_Zone, CFF_Decoder): Moved declarations to...
* include/freetype/internal/psaux.h: Here.
* src/psaux/cf2ft.h: Updated include.
* src/psaux/psaux.c, src/psaux/rules.mk: Updated with the new file.
Requested by Behdad.
Modern bitmap-only SFNTs like `NotoColorEmoji.ttf' don't contain
entries in the bitmap strike(s) for empty glyphs. Instead, they
rely that a space glyph gets created from the font's metrics data.
This commit makes FreeType behave accordingly.
* include/freetype/fterrdef.h (FT_Err_Missing_Bitmap): New error
code.
* src/sfnt/ttsbit.c (tt_sbit_decoder_load_image): Change error codes
to make a distinction between a missing bitmap in a composite and a
simple missing bitmap.
* src/truetype/ttgload.c (TT_Load_Glyph): For a missing bitmap (in a
bitmap-only font), synthesize an empty bitmap glyph if metrics are
available.
This is a new technology for LCD-optimized rendering. It capitalizes
on the fact that each color channel grid is shifted by a third of a
pixel. Therefore it is logical to render 3 separate monochrome
bitmaps shifting the outline by 1/3 pixel, and then combine them.
Importantly, the resulting output does not require additional LCD
filtering.
* src/smooth/ftsmooth.c (ft_smooth_render_generic)
[!FT_CONFIG_OPTION_SUBPIXEL_RENDERING]: Implement new LCD-optimized
rendering.
* include/freetype/ftlcdfil.h, include/freetype/freetype.h,
include/freetype/config/ftoption.h, devel/ftoption.h: Updated
documentation.
The reserved `flags' field got a value in OpenType version 1.8.2;
unfortunately, the public `FT_Var_Axis' structure misses the
corresponding element. Since we can't add a new field, we add an
access function.
* src/base/ftmm.c (FT_Get_Var_Axis_Flags): New function.
* include/freetype/ftmm.h (FT_VAR_AXIS_FLAG_HIDDEN): New macro.
Updated.
* src/truetype/ttgxvar.c (TT_Get_MM_Var): Increase allocated memory
of `mmvar' to hold axis flags.
Fill the axis flags array.
* docs/CHANGES: Updated.
While clang's sanitizer recommends a cast to unsigned for safe
negation (to handle -INT_MIN), both MSVC and Visualc emit warning
C4146 if an unsigned value gets negated.
* include/freetype/internal/ftcalc.h (NEG_LONG, NEG_INT32),
src/base/ftcalc.c (FT_MOVE_SIGN): Replace negation with a
subtraction.
These versions don't produce run-time errors due to integer
overflow.
* include/freetype/internal/ftobjs.h: Include FT_INTERNAL_CALC_H.
(FT_PAD_ROUND_LONG, FT_PAD_CEIL_LONG, FT_PIX_ROUND_LONG,
FT_PIX_CEIL_LONG): New macros.
(FT_PAD_ROUND_INT32, FT_PAD_CEIL_INT32, FT_PIX_ROUND_INT32,
FT_PIX_CEIL_INT32): New macros.
This commit handles the new engine.
* include/freetype/internal/ftcalc.h (OVERFLOW_ADD_INT32,
OVERFLOW_SUB_INT32, OVERFLOW_MUL_INT32, NEG_INT, NEG_LONG,
NEG_INT32): New macros.
* src/cff/cf2ft.c (cf2_getScaleAndHintFlag): Use OVERFLOW_ADD_INT32.
* src/cff/cf2hints.c (cf2_getWindingMomentum, cf2_hint_init,
cf2_hintmap_map, cf2_glyphpath_hintPoint,
cf2_glyphpath_computeIntersection, cf2_glyphpath_computeOffset,
cf2_glyphpath_lineTo, cf2_glyphpath_curveTo): Use
OVERFLOW_ADD_INT32, OVERFLOW_SUB_INT32, OVERFLOW_MUL_INT32, and
NEG_INT32 where appropriate.
* src/cff/cf2intrp.c (cf2_doFlex, cf2_doBlend,
cf2_interpT2CharString): Ditto.
Also add some other code where needed to avoid overflow.
This commit (mainly for 32bit CPUs) is the first of a series of
similar commits to handle known integer overflows. Basically, all
of them are harmless, since they affect rendering of glyphs only,
not posing security threats. It is expected that fuzzying will show
up more overflows, to be fixed in due course.
The idea is to mark places where overflows can occur, using macros
that simply cast to unsigned integers, because overflow arithmetic
is well defined in this case. Doing so suppresses run-time errors
of sanitizers without adding computational overhead.
* include/freetype/internal/ftcalc.h (OVERFLOW_ADD_INT,
OVERFLOW_SUB_INT, OVERFLOW_MUL_INT, OVERFLOW_ADD_LONG,
OVERFLOW_SUB_LONG, OVERFLOW_MUL_LONG): New macros.
* src/base/ftcalc.c (FT_RoundFix, FT_CeilFix, FT_Matrix_Multiply,
FT_Matrix_Multiply_Scaled, FT_Vector_Transform_Scaled,
ft_corner_orientation): Use new macros.
* src/base/ftoutln.c (FT_Outline_Get_Orientation): Use new macros.
Extra bitmap padding for LCD filtering depends on the filter. The
default 5-tap filter needs 2 extra subpixels. The light 3-tap filter
needs only 1 extra subpixel. This space could be already available
due to rounding. In order to optimize the padding, we now expand
CBox for the given filter weights before rounding.
This change breakes current Skia (and Firefox).
* include/freetype/internal/ftobjs.h (FT_LibraryRec)
[FT_CONFIG_OPTION_SUBPIXEL_RENDERING]: Remove `lcd_extra' field.
* src/base/ftlcdfil.c (FT_Library_SetLcdFilterWeights,
FT_Library_SetLcdFilter): Remove `lcd_extra' initializations.
* src/smooth/ftsmooth.c (ft_smooth_render_generic): Implement dymanic
LCD padding.
=======================
Tag sources with `VER-2-8'.
* docs/VERSION.TXT: Add entry for version 2.8.
* docs/CHANGES: Updated.
* README, Jamfile (RefDoc), builds/windows/vc2005/freetype.vcproj,
builds/windows/vc2005/index.html,
builds/windows/vc2008/freetype.vcproj,
builds/windows/vc2008/index.html,
builds/windows/vc2010/freetype.vcxproj,
builds/windows/vc2010/index.html,
builds/windows/visualc/freetype.dsp,
builds/windows/visualc/freetype.vcproj,
builds/windows/visualc/index.html,
builds/windows/visualce/freetype.dsp,
builds/windows/visualce/freetype.vcproj,
builds/windows/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/2.7.1/2.8/, s/271/28/.
* include/freetype/freetype.h (FREETYPE_MINOR): Set to 8.
(FREETYPE_PATCH): Set to 0.
* builds/unix/configure.raw (version_info): Set to 20:0:14.
* CMakeLists.txt (VERSION_MINOR): Set to 8.
(VERSION_PATCH): Set to 0.
* include/freetype/config/ftoption.h
(AF_CONFIG_OPTION_TT_SIZE_METRICS): New option, commented out by
default.
* src/autofit/afloader.c (af_loader_load_glyph): Use
AF_CONFIG_OPTION_TT_SIZE_METRICS to guard the corresponding code.
This mode uses fractional advance widths and doesn't scale glyphs
horizontally, only applying vertical scaling and hinting.
At the same time, the behaviour of the `light' auto-hinter gets
restored for backwards compatibility: Both vertical and horizontal
scaling is again based on rounded metrics values (this was changed
in a commit from 2017-03-30 as a side effect). To be more precise,
the behaviour is restored for TrueType fonts only; for other font
formats like Type 1, this is a new feature of the `light' hinting
mode.
* include/freetype/freetype.h (FT_LOAD_TARGET_SLIGHT): New macro.
(FT_RENDER_MODE_SLIGHT): New render mode.
* include/freetype/internal/ftobjs.h (FT_Size_InternalRec): Add
`autohint_mode' and `autohint_metrics' fields.
* src/autofit/afcjk.c (af_cjk_hints_init), src/autofit/aflatin.c
(af_latin_hints_init), src/autofit/aflatin2 (af_latin2_hints_init):
Updated.
* src/autofit/afloader.c (af_loader_embolden_glyph_in_slot): Use
`autohint_metrics'.
(af_loader_load_glyph): s/internal/slot_internal/.
Initialize `autohint_metrics' and `autohint_mode' depending on
current auto-hint mode.
Use `autohint_metrics'.
Updated.
* src/base/ftadvanc.c (LOAD_ADVANCE_FAST_CHECK): Updated.
* src/base/ftobjs.c (FT_Load_Glyph): Updated.
(FT_New_Size): Allocate `internal' object.
* src/pshinter/pshalgo.c (ps_hints_apply): Updated.
* src/smooth/ftsmooth.c (ft_smooth_render): Updated.
Ewald Hew
Werner Lemberg
Alexei Podtelezhnikov
Behdad Esfahbod
Ben Wagner
Hin-Tak Leung