Commit Graph

91 Commits

Author SHA1 Message Date
Alexei Podtelezhnikov 0dc811b548 [truetype] Binary search through `hdmx` records.
The `hdmx` table is supposed to be sorted by ppem size, which
enables binary search.  We also drop the check for the sufficient
length of the record because it is now enforced when the table
is loaded.

* include/freetype/internal/tttypes.h (TT_FaceRec): Store the `hdmx`
record pointers sorted by ppem instead of ppem's themselves.
* src/truetype/ttpload.c (tt_face_load_hdmx): Prudently sort records.
(tt_face_get_device_metrics): Implement binary search to retrieve
advances.
2021-12-10 22:32:05 -05:00
Alexei Podtelezhnikov 36a905e174 * src/truetype/ttpload.c (tt_face_load_hdmx): Added comments. 2021-11-26 09:15:46 -05:00
Alexei Podtelezhnikov 32f13c11a4 [truetype] Quietly reject out-of-spec `hdmx` tables.
The `hdmx` table is optional and can be safely rejected without
an error if it does not follow specifications. The record size
must be equal to the number of glyphs + 2 + 32-bit padding.

* src/truetype/ttpload.c (tt_face_load_hdmx): Thoroughly check
the record size and improve tracing.
2021-11-25 22:38:40 -05:00
Alexei Podtelezhnikov cff026d415 [truetype] Partly revert 5b626281.
Fixes #1118.

* src/truetype/ttpload.c (tt_face_load_hdmx): Do not assume that
`record_size` is rounded even though the records are padded.
2021-11-23 16:05:12 -05:00
Alexei Podtelezhnikov fab94f9fcc [truetype] Avoid some memory zeroing.
* src/truetype/ttgload.c (load_truetype_glyph): Use Q-macro.
* src/truetype/ttinterp.c (Update_Max): Ditto.
* src/truetype/ttpload.c (src/truetype/ttpload.c): Ditto.
2021-09-12 23:30:07 -04:00
Alexei Podtelezhnikov 5b626281f1 [truetype] Tweak `hdmx` checking.
Fixes #1096.

* src/truetype/ttpload.c (tt_face_load_hdmx): Account for padding.
2021-09-10 10:19:07 -04:00
Alexei Podtelezhnikov e942a31007 [truetype] Tweak `loca` clamping.
Fixes #1095.

* src/truetype/ttpload.c (tt_face_load_loca): Fix up clamping.
* include/freetype/internal/tttypes.h (TT_Face): Correct docs.
2021-09-09 22:17:46 -04:00
Alexei Podtelezhnikov 56ae943050 [truetype] Avoid some memory zeroing.
* src/truetype/ttinterp.c (Init_Context): Tweak allocation macro.
* src/truetype/ttpload.c (tt_face_load_cvt): Ditto.
2021-05-01 09:14:04 -04:00
Werner Lemberg d924a66a5c * src/*: Don't use more than one '\n' in `FT_TRACE` and `FT_ERROR`.
This ensures good logging output, with all lines having a proper
prefix (if requested).

This is a continuation of a similar patch from 2020-12-02, which
missed some locations.
2021-02-04 07:46:46 +01:00
Werner Lemberg b6e8a71266 Update all copyright notices. 2021-01-17 07:18:48 +01:00
Priyesh Kumar 53be1753de Fix `-Wformat' compiler warnings.
* src/*: Fix format specifiers.

* builds/unix/ftsystem.c (FT_Stream_Open): Ditto.
2020-07-28 07:33:40 +02:00
Werner Lemberg 1658685967 Remove redundant inclusion of `ft2build.h'.
* */*: Remove `#include <ft2build.h>' where possible.

* include/freetype/freetype.h: Remove cpp error about missing
inclusion of `ft2build.h'.
2020-06-13 21:15:45 +02:00
David Turner e13391333f Make macros for header file names optional.
We no longer have to take care of the 8.3 file name limit; this
allows us (a) to introduce longer, meaningful file names, and (b) to
avoid macro names in `#include' lines altogether since some
compilers (most notably Visual C++) doesn't support this properly.

*/*: Replace

   #include FOO_H

with

   #include <freetype/foo.h>

or something similar.  Also update the documentation.
2020-06-08 13:31:55 +02:00
Werner Lemberg e5038be704 Update all copyright notices. 2020-01-19 17:05:19 +01:00
Werner Lemberg 9df460b632 [truetype] Avoid sanitizer warning (#57289).
* src/truetype/ttpload.c (tt_face_get_device_metrics): Use
`FT_OFFSET'.
2019-11-23 11:09:40 +01:00
Werner Lemberg 37580053b4 [truetype] Use 26.6 format for storing unscaled CVT values.
If `CVAR' data is applied to variation fonts, fractional values are
possible.

* include/freetype/internal/tttypes.h (TT_FaceRec): Change type of
`cvt' from `FT_Short' to `FT_Int32'.

* src/truetype/ttgxvar.c (FT_fdot6ToFixed): New macro.
(tt_face_vary_cvt): Use it to update code to 26.6 format.

* src/truetype/ttobjs.c (tt_size_run_prep): Update code to 26.6
format.

* src/truetype/ttpload.c (tt_face_load_cvt): Stora data in 26.6
format.
2019-05-16 12:15:54 +02:00
Werner Lemberg 7585997024 Update all copyright notices. 2019-02-23 10:07:09 +01:00
Werner Lemberg f686ad46a3 Update copyright years. 2019-01-22 20:31:44 +01:00
Werner Lemberg a0dd16fb3d Don't use `trace_' prefix for FT_COMPONENT arguments.
* include/freetype/internal/ftdebug.h (FT_TRACE_COMP,
FT_TRACE_COMP_): New auxiliary macros to add `trace_' prefix.
(FT_TRACE): Use `FT_TRACE_COMP'.

*/* (FT_COMPONENT): Updated.
2018-08-15 18:13:17 +02:00
Werner Lemberg 9ac9060df0 [GSoC] src/*.*: Convert block comments to `light' style.
This monster commit was created by applying Nikhil's scripts
`docconverter.py' and `markify.py' to all C header and source files,
followed up by minor manual clean-up.

No change in functionality, of course.

I used commit f7419907bc6044b9b7057f9789866426c804ba82 from
https://github.com/nikramakrishnan/freetype-docs.git.
2018-06-03 09:08:41 +02:00
Werner Lemberg 0a0c22569d Update copyright year. 2018-01-02 09:33:57 +01:00
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
Werner Lemberg 563ae78022 Update copyright year. 2017-01-04 20:16:34 +01:00
Werner Lemberg a300c1c3af * src/truetype/ttpload.c (tt_face_load_hdmx): Ignore `version'.
Problem reported by 張俊芝 <418092625@qq.com>.
2016-12-24 09:27:15 +01:00
Werner Lemberg fde0b78cce * src/truetype/ttpload.c (tt_face_load_loca): Sanitize table length.
This trivial fix allows us to accept more fonts.

Problem reported by 張俊芝 <418092625@qq.com>.
2016-12-24 08:17:19 +01:00
Werner Lemberg 7c75b166c8 [sfnt, truetype] Various sanitizing fixes.
* src/sfnt/sfobjs.c (sfnt_init_face): If the axis count in `fvar' is
zero, set `num_instances' to zero.

* src/truetype/ttgxvar.c (TT_Get_MM_Var): Handle `fvar' table with
zero axes as invalid.

* src/truetype/ttobjs.c (tt_face_init): Improve logic of loading
`loca', `cvt', `fpgm', and `prep' table.
2016-12-17 13:28:24 +01:00
Werner Lemberg ddf3872699 [truetype] Fix commit from 2014-11-24.
Problem reported by Hin-Tak Leung  <htl10@users.sourceforge.net>.

* src/truetype/ttpload.c (tt_face_load_hdmx): Fix file checking
logic.
2016-10-27 07:27:27 +02:00
Werner Lemberg e27b8a5598 [truetype] Speed up `TT_Load_Glyph'.
This avoids additional calls to `tt_face_lookup_table' for the
`glyf' table, which can be expensive.

* include/freetype/internal/tttypes.h (TT_LoaderRec): Move
`glyf_offset' field to ...
(TT_FaceRec): ... this structure.
* src/truetype/ttgload.c (load_truetype_glyph): Updated.
(tt_loader_init): Move initialization of `glyf_offset' to ...
* src/truetype/ttpload.c (tt_face_load_loca): .. this function.
2016-09-27 21:21:01 +02:00
Werner Lemberg a764963f26 [truetype] Sanitize only last entry of `loca' table.
Without this patch, a loca sequence like `0 100000 0 100000 ...',
where value 100000 is larger than the `glyf' table size, makes
FreeType handle the whole `glyf' table as a single glyph again and
again, which is certainly invalid (and can be very slow, too).

* src/truetype/ttpload.c (tt_face_get_location): Implement.
Improve tracing messages.
2016-09-25 16:29:05 +02:00
Werner Lemberg 9adeab6452 Update copyright year. 2016-01-13 11:54:10 +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 6de2a355ff Minor. 2015-10-15 08:40:12 +02:00
Werner Lemberg 8651f37ad5 [truetype] Adjust number of glyphs for malformed `loca' tables.
* src/truetype/ttpload.c (tt_face_load_loca): Implement it.
2015-09-30 10:26:10 +02:00
Werner Lemberg 0a33a3984f [truetype] Various signedness fixes.
* include/internal/ftgloadr.h, src/truetype/ttpload.c: Apply.

* src/truetype/ttgload.c: Apply.
(TT_Get_VMetrics): Protect against invalid ascenders and descenders
while constructing advance height.
2015-02-17 08:03:05 +01:00
Werner Lemberg 82235d0474 Next round of minor compiler warning fixes.
* include/internal/ftrfork.h (FT_RFork_Ref): Change `offset' member
type to `FT_Long'.
(CONST_FT_RFORK_RULE_ARRAY_BEGIN): Add `static' keyword.

* include/internal/ftstream.h (FT_Stream_Pos): Return `FT_ULong'.

* src/base/ftoutln.c, src/base/ftrfork.c, src/base/ftstream.c:
Signedess fixes.
2015-02-16 19:35:16 +01:00
Werner Lemberg f57fc59e01 Run `src/tools/update-copyright'. 2015-01-17 20:41:43 +01:00
Werner Lemberg eca0f06706 [truetype] Fix Savannah bug #43679.
* src/truetype/ttpload.c (tt_face_load_hdmx): Check minimum size of
`record_size'.
2014-11-24 10:22:08 +01:00
Werner Lemberg 89f5064765 */*: Use FT_ERR_EQ, FT_ERR_NEQ, and FT_ERR where appropriate.
FT_Err_XXX and friends are no longer directly used in the source
code.
2013-03-14 17:50:49 +01:00
Werner Lemberg e3c9301581 */*: Use FT_Err_Ok only.
This is a purely mechanical conversion.
2013-03-14 11:21:17 +01:00
Werner Lemberg 059bc335ce */*: Use `FT_THROW'.
This is essentially a mechanical conversion, adding inclusion of
`FT_INTERNAL_DEBUG_H' where necessary, and providing the macros for
stand-alone compiling modes of the rasterizer modules.

To convert the remaining occurrences of FT_Err_XXX and friends it is
necessary to rewrite the code.  Note, however, that it doesn't harm
if some cases are not handled since FT_THROW is a no-op.
2013-03-14 10:27:35 +01:00
Werner Lemberg c017f072e4 Fix tracing message for `loca' table.
* src/truetype/ttpload.c (tt_face_get_location): Don't emit a
warning message if the last `loca' entry references an empty glyph.
2012-01-02 22:33:42 +01:00
Werner Lemberg eef90d3d1e Whitespace. 2012-01-02 14:11:43 +01:00
Werner Lemberg 01caf4a7a9 * src/truetype/ttpload.c(tt_face_load_loca): Fix mismatch warning. 2011-03-23 05:19:59 +01:00
Werner Lemberg ec4372f565 [truetype] Fix `loca' handling for inconsistent number of glyphs.
Reported by Johnson Y. Yan <yinsen_yan@foxitsoftware.com>.

* src/truetype/ttpload.c (tt_face_load_loca): While sanitizing,
handle case where `loca' is the last table in the font.
2010-11-18 20:34:22 +01:00
suzuki toshiya 643d49df09 [truetype] Sanitize the broken offsets in `loca'.
* 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.
See Savannah bug #31040.
2010-09-20 01:16:39 +09:00
suzuki toshiya 25dba9cfa8 truetype: Extend TT_Face->num_locations for broken TTFs. 2009-08-01 00:32:09 +09:00
Werner Lemberg 858abbedc0 For warning messages, replace FT_ERROR with FT_TRACE0.
FT_ERROR is now used only if a function produces a non-zero `error'
value.

Formatting, improving and harmonizing debug strings.
2009-06-26 06:15:41 +02:00
Werner Lemberg b47b97db84 Fix comment.
OpenType 1.6 now mentions that data in the `loca' table must be ordered.
2009-04-04 07:51:45 +02:00
Werner Lemberg 1474f439b5 Really fix Savannah bug #25010: An SFNT font with neither outlines
nor bitmaps can be considered as containing space `glyphs' only.

* src/truetype/ttpload.c (tt_face_load_loca): Handle the case where
a `glyf' table is missing.

* src/truetype/ttgload.c (load_truetype_glyph): Abort if we have no
`glyf' table but a non-zero `loca' entry.
(tt_loader_init): Handle missing `glyf' table.

* src/base/ftobjs.c (FT_Load_Glyph): Undo change 2008-12-05.

* src/sfnt/sfobjs.c (sfnt_load_face): A font with neither outlines
nor bitmaps is scalable.
2008-12-09 06:51:56 +00:00
Werner Lemberg 6b19e095be * src/truetype/ttpload.c (tt_face_load_loca): Handle buggy fonts
where num_locations < num_glyphs.  Problem reported by Ding Li.
2008-07-09 06:20:12 +00:00