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Author SHA1 Message Date
Alexei Podtelezhnikov
410f3799b6 [smooth] Harmony LCD rendering. 
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.
 2017-08-08 22:29:51 -04:00
Alexei Podtelezhnikov
5710ef989d * src/smooth/ftsmooth.c (ft_smooth_render_generic): Clean up. 2017-08-08 22:00:35 -04:00
Alexei Podtelezhnikov
a9d8e90caf * src/sftnt/ttpost.c (format): Use otspec-compliant versions. 2017-08-08 21:42:37 -04:00
Werner Lemberg
986a21b73a CHANGES update suggested by Nikolaus. 2017-08-06 06:35:19 +02:00
Werner Lemberg
17196b7c74 [truetype] Integer overflow. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2868

* src/truetype/ttinterp.c (Ins_ALIGNRP): Use NEG_LONG.
 2017-08-05 18:58:34 +02:00
Werner Lemberg
f43b3094ef [base, truetype] New function `FT_Get_Var_Axis_Flags'. 
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.
 2017-08-05 18:22:17 +02:00
Nikolaus Waxweiler
24e256ab00 [truetype] Fix metrics of B/W hinting in v40 mode. 
Phantom points are now saved outside v40 backwards compatibility
mode.  This fixes the jumping glyphs when switching between v35 and
v40 monochrome mode.

* src/truetype/ttgload.c (TT_Hint_Glyph): Fix inversed bool logic.
 2017-08-04 08:25:31 +02:00
Nikolaus Waxweiler
7f44c2db24 [truetype] Do not set any ClearType flags in v40 monochrome mode. 
This fixes weird behavior of instructions that resulted in rendering
differences between v35 and v40 in monochrome mode, e.g., in
`timesbi.ttf'.

* src/truetype/ttinterp.c (Ins_GETINFO)
[TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL]: Check
`subpixel_hinting_lean'.
 2017-08-03 06:15:30 +02:00
Werner Lemberg
7e50824288 * src/truetype/ttgxvar.c (TT_Get_MM_Var): Fix thinko. 2017-08-01 12:44:35 +02:00
Werner Lemberg
e6b9b6bafc Update CHANGES file. 2017-08-01 09:34:24 +02:00
Behdad Esfahbod
55bbb98f5c [truetype] Fix loading of named instances. 
* src/truetype/ttgxvar.c (TT_Get_MM_Var): Preserve file position
while loading the `avar' table.
 2017-08-01 09:17:02 +02:00
Werner Lemberg
ce367774d2 [sfnt, truetype] Minor adjustments for OpenType 1.8.2. 
* src/sfnt/sfobjs.c (sfnt_load_face): The units per EM value has now
(tighter) limits.

* src/truetype/ttgload.c (load_truetype_glyph): The new OpenType
version explicitly allows all negative values for the number of
contours if we have a composite glyph (this is for better backwards
compatibility I guess), but it still recommends value -1.
 2017-08-01 08:24:51 +02:00
Werner Lemberg
933f4cbe79 [cff] Integer overflow. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2738

* src/cff/cf2hints.c (cf2_glyphpath_computeOffset,
cf2_glyphpath_curveTo): Use ADD_INT32.
 2017-07-26 23:32:32 +02:00
Werner Lemberg
38bdf22bfe [truetype] Improve code comment. 2017-07-13 10:28:09 +02:00
Werner Lemberg
fe0a7d9df5 [base] Fix memory leak. 
Reported as

  https://bugs.chromium.org/p/chromium/issues/detail?id=738362

* src/base/ftglyph.c (FT_Get_Glyph): Do proper deallocation in case
of error.
 2017-07-13 10:25:42 +02:00
Werner Lemberg
134de096e0 [base] Integer overflow. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2573

* src/base/ftobjs.c (ft_glyphslot_grid_fit_metrics): Use
FT_PIX_CEIL_LONG and FT_PIX_ROUND_LONG.
 2017-07-12 22:16:37 +02:00
Werner Lemberg
b5cab5c9ca Document how to scale manually. 2017-07-12 21:58:35 +02:00
Werner Lemberg
229a5535b5 CHANGES: Add information on global metrics rounding. 
I missed to add this important information.
 2017-07-12 10:48:41 +02:00
Werner Lemberg
3d083fc213 * src/truetype/ttpload.c (tt_face_get_location): Off-by-one typo. 
Also improve tracing message.

Problem reported as

  https://bugs.chromium.org/p/chromium/issues/detail?id=738919
 2017-07-12 00:24:48 +02:00
Hin-Tak Leung
39af82ebbf Changelog: typo, chromium issue id is 2276 instead of 2278 
Signed-off-by: Hin-Tak Leung <htl10@users.sourceforge.net>
 2017-07-11 23:43:08 +02:00
Werner Lemberg
9ea83c7889 [cff] Integer overflow. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2517

* src/cff/cf2blues.c (cf2_blues_capture): Use SUB_INT32.
 2017-07-07 17:09:43 +02:00
Alexei Podtelezhnikov
762de5e285 Tweak suggested use of lsb_delta' and rsb_delta'. 2017-07-06 22:31:57 -04:00
Werner Lemberg
cf8d9b4ce3 * src/sfnt/ttcmap.c (tt_cmap_unicode_class_rec): Fix warning. 2017-07-05 23:07:01 +02:00
Werner Lemberg
4261e497d8 * src/truetype/ttgxvar.c (FT_Stream_SeekSet): Fix warning (#51395). 2017-07-05 23:00:23 +02:00
Werner Lemberg
1c85479d2d [truetype] Prevent address overflow (#51365). 
* src/truetype/ttgxvar.c (FT_Stream_SeekSet): Add guard.
 2017-07-04 08:08:54 +02:00
Alexei Podtelezhnikov
c56d8851ea * src/base/ftlcdfil.c (ft_lcd_filter_fir): Improve code. 2017-07-03 22:49:07 -04:00
Werner Lemberg
ca799e9be5 [truetype] Integer overflow. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2455

* src/truetype/ttinterp.c (Ins_SCFS): Use SUB_LONG.
 2017-07-03 06:27:52 +02:00
Alexei Podtelezhnikov
abeb28f161 * src/sfnt/sfobjs.c (sfnt_load_face): Ignore No_Unicode_Glyph_Name. 2017-07-01 16:48:32 -04:00
Ben Wagner
7819aeb622 Avoid Microsoft compiler warnings (#51331). 
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.
 2017-06-28 22:57:41 +02:00
Werner Lemberg
2e7bb5e825 * src/cff/cffparse.c (do_fixed): Fix typo. 
Spotted by chris <chris@gcjd.org>.
 2017-06-27 16:56:38 +02:00
Werner Lemberg
dde8f5abbe [truetype] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2384
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2391

* src/base/ftcalc.c (FT_MulDiv, FT_MulDiv_No_Round, FT_DivFix): Use
NEG_LONG.

* src/truetype/ttinterp.c (Ins_SxVTL): Use NEG_LONG.
 2017-06-27 06:16:04 +02:00
Werner Lemberg
b27cef27ff [truetype] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2364

* src/truetype/ttinterp.c (Ins_ISECT): Use NEG_LONG.
 2017-06-24 20:17:46 +02:00
Werner Lemberg
298e2ea5a6 [cff, truetype] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2323
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2328

* src/cff/cf2blues.c (cf2_blues_capture): Use ADD_INT32 and
SUB_INT32.

* src/truetype/ttinterp.c (Ins_SDPVTL): Use SUB_LONG and NEG_LONG.
 2017-06-22 11:52:43 +02:00
Alexei Podtelezhnikov
75cb071b3f [sfnt] Synthesize a Unicode charmap if one is missing. 
* src/sfnt/ttcmap.h (tt_cmap_unicode_class_rec): Declare it.
* src/sfnt/ttcmap.c (tt_get_glyph_name, tt_cmap_unicode_init,
tt_cmap_unicode_done, tt_cmap_unicode_char_index,
tt_cmap_unicode_char_next, tt_cmap_unicode_class_rec): Implement
synthetic Unicode charmap class.
(tt_get_cmap_info): Make sure the callback is available.

* src/sfnt/sfobjs.c (sfnt_load_face)
[FT_CONFIG_OPTION_POSTSCRIPT_NAMES]: If Unicode charmap is missing,
synthesize one.

* include/freetype/config/ftoption.h: Document it.
* devel/ftoption.h: Ditto.
 2017-06-21 22:52:37 -04:00
Werner Lemberg
390048fa46 Remove deprecated comment. 2017-06-20 18:03:20 +02:00
Tony Theodore
c8829e4bc1 Fix pkg-config in freetype-config for cross-compiling (#51274). 
* builds/unix/unix-def.in (PKG_CONFIG): New variable.
(freetype-config): Use it in sed expression.

* builds/unix/freetype-config.in: s/pkg-config/%PKG_CONFIG%/.
 2017-06-20 12:24:05 +02:00
Werner Lemberg
8c763fb1be [cff, truetype] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2300
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2313

* src/cff/cf2hints.c (cf2_hintmap_adjustHints): Use ADD_INT32.

* src/truetype/ttinterp.c (Ins_ABS): Avoid FT_ABS.
 2017-06-20 07:49:52 +02:00
Alexei Podtelezhnikov
7b7278334c [base, smooth] LCD filtering cleanups. 
* src/base/ftlcdlil.c (ft_lcd_filter_fir, _ft_lcd_filter_legacy):
Clean up, start filtering from the bottom-left origin.

* src/smooth/ftsmooth.c (ft_smooth_render_generic): Updated.
 2017-06-17 23:28:14 -04:00
Werner Lemberg
4dc00cf5c0 [truetype] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2270
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2278

* src/truetype/ttinterp.c (Ins_MDRP, _iup_worker_interpolate): Use
ADD_LONG and SUB_LONG.
 2017-06-16 13:33:09 +02:00
Werner Lemberg
dbeb7bce7f [bdf, cff] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2244
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2261

* src/bdf/bdfdrivr.c (BDF_Face_Init): Replace calls to FT_ABS with
direct code to avoid value negation.

* src/cff/cf2blues.c (cf2_blues_capture): Use SUB_INT32 and
ADD_INT32.
 2017-06-15 19:39:50 +02:00
Werner Lemberg
79e3789f81 * src/winfonts/winfnt.c (FNT_Face_Init): Don't set active encoding. 
FreeType only sets a default active encoding for Unicode.
 2017-06-14 07:51:04 +02:00
Werner Lemberg
5c402d97af [cff, truetype] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2216
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2218

* src/cff/cf2fixed.h (cf2_fixedAbs): Use NEG_INT32.

* src/truetype/ttinterp.c (Ins_IP): Use SUB_LONG.
 2017-06-13 06:56:48 +02:00
Werner Lemberg
3ed3a96181 [cff] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2200
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2210

* src/cff/cf2hints.c (cf2_hintmap_insertHint): Use SUB_INT32 and
ADD_INT32.

* src/cff/cf2intrp.c (cf2_interpT2CharString) <cf2_cmdVMOVETO>: Use
ADD_INT32.
 2017-06-11 13:50:37 +02:00
Werner Lemberg
5f2a72cbc7 [truetype] Fix TT_Set_Var_Design. 
Reported by Nikolaus Waxweiler <madigens@gmail.com>.

* src/truetype/ttgxvar.c (TT_Set_Var_Design): Correctly handle the
case where we have less input coordinates than axes.
 2017-06-10 11:29:24 +02:00
Werner Lemberg
2c4fba9c91 * src/base/ftcalc.c (FT_DivFix): Fix embarrassing typo. 
Bug introduced 2017-05-28.
 2017-06-10 11:03:41 +02:00
Werner Lemberg
9038837ee2 [cff, truetype] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2144
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2151
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2153
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2173
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2186

* src/cff/cf2blues.c (cf2_blues_init): Use SUB_INT32.

* src/truetype/ttinterp.c (Round_None, Round_To_Grid,
Round_To_Half_Grid, Round_Down_To_Grid, Round_Up_To_Grid,
Round_To_Double_Grid, Round_Super, Round_Super_45): Use ADD_LONG,
SUB_LONG, NEG_LONG, FT_PIX_ROUND_LONG, FT_PIX_CEIL_LONG,
FT_PAD_ROUND_LONG
(Ins_SxVTL, Ins_MIRP): Use SUB_LONG.
(_iup_worker_shift): Use SUB_LONG and ADD_LONG.
 2017-06-09 20:42:46 +02:00
Werner Lemberg
96d26926d1 Provide more macros for flooring, ceiling, and rounding. 
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.
 2017-06-09 20:34:28 +02:00
Werner Lemberg
faf34d29e2 Remove unused macros. 
* include/freetype/internal/ftcalc.h (ADD_INT, SUB_INT, MUL_INT,
NEG_INT): Deleted.
 2017-06-09 20:31:24 +02:00
Werner Lemberg
dcd8de272f */*: Remove `OVERFLOW_' prefix. 
This increases readability.
 2017-06-09 11:21:58 +02:00
Werner Lemberg
7bffeacd7e [cff, truetype] Integer overflows. 
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2133
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2137

* src/cff/cf2hints.c (cf2_hint_init): Use OVERFLOW_SUB_INT32.

* src/truetype/ttinterp.c (PROJECT, DUALPROJ): Use
OVERFLOW_SUB_LONG.
 2017-06-07 17:08:01 +02:00