Commit Graph

167 Commits

Author SHA1 Message Date
Alexei Podtelezhnikov 857038399a Use FT_INT64 instead of FT_LONG64.
* include/freetype/config/integer-types.h: Remove synonymous FT_LONG64.
* include/freetype/internal/ftcalc.h: s/FT_LONG64/FT_INT64/.
* src/base/ftcalc.c: Ditto.
* src/base/fttrigon.c: Ditto.
* src/smooth/ftgrays.c: Ditto.
2021-08-18 23:05:51 -04:00
Werner Lemberg 08f66322e3 More various documentation improvements and fixes. 2021-06-08 18:23:16 +02:00
Werner Lemberg b6e8a71266 Update all copyright notices. 2021-01-17 07:18:48 +01:00
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 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 77f0814a31 Add macros for handling over-/underflowing `FT_Int64' values.
* include/freetype/internal/ftcalc.h (ADD_INT64, SUB_INT64,
MUL_INT64, DIV_INT64) [FT_LONG64]: New macros.

* src/base/ftcalc.c (ft_corner_orientation) [FT_LONG64]: Use
`SUB_INT64' and `MUL_INT64'.

Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10028
2018-08-23 17:53:54 +02:00
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 5b904409fc * src/base/ftcalc.c (FT_Matrix_Check): Fix integer overflow.
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9811
2018-08-11 06:41:35 +02:00
Werner Lemberg cc3333902b New base function `FT_Matrix_Check' (#54019).
* src/base/ftcalc.c (FT_Matrix_Check): New base function to properly
reject degenerate font matrices.

* include/freetype/internal/ftcalc.h: Updated.

* src/cff/cffparse.c (cff_parse_font_matrix), src/cid/cidload.c
(cid_parse_font_matrix), src/type1/t1load.c (t1_parse_font_matrix),
src/type42/t42parse.c (t42_parse_font_matrix): Use
`FT_Matrix_Check'.
2018-06-24 06:26:09 +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 39ce3ac499 * Version 2.8.1 released.
=========================

Tag sources with `VER-2-8-1'.

* docs/VERSION.TXT: Add entry for version 2.8.1.
* 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/2.8/2.8.1/, s/28/281/.

* include/freetype/freetype.h (FREETYPE_PATCH): Set to 1.

* builds/unix/configure.raw (version_info): Set to 21:0:15.
* CMakeLists.txt (VERSION_PATCH): Set to 1.
2017-09-16 19:08:17 +02:00
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 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 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 dcd8de272f */*: Remove `OVERFLOW_' prefix.
This increases readability.
2017-06-09 11:21:58 +02:00
Werner Lemberg fbe2fe4c75 Handle some integer overflow run-time errors (#46149, #48979).
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.
2017-05-29 13:29:28 +02:00
Werner Lemberg 9357219082 Fix negation of INT_MIN and LONG_MIN (#46149).
* src/base/ftcalc.c (FT_MOVE_SIGN): Add argument to pass unsigned
value, to be used as the result.
(FT_MulDiv, FT_MulDiv_No_Round, FT_DivFix, FT_MulFix,
FT_Vector_NormLen): Updated.
2017-05-28 07:20:09 +02:00
Werner Lemberg 563ae78022 Update copyright year. 2017-01-04 20:16:34 +01:00
Werner Lemberg 37c72f66a5 Minor formatting. 2016-12-25 22:55:25 +01:00
Werner Lemberg fc11af1ea2 Various minor clang fixes.
* src/autofit/afcjk.c (af_cjk_metrics_init_widths),
src/autofit/aflatin.c (af_latin_metrics_init_widths): Initialize
`ch'.

* src/base/ftcalc.c (FT_MulFix) [FT_LONG64]: Add cast.

* src/base/ftdbgmem.c (ft_mem_table_destroy): Add cast.

* src/base/fthash.c (hash_num_lookup): Add cast.

* src/base/fttrigon.c (ft_trig_downscale) [FT_LONG64]: Fix cast.

* src/gxvalid/gxvcommn.c (gxv_EntryTable_validate): Comment out
redundant code.

* src/type1/t1driver.c (t1_get_ps_font_value) <PS_DICT_SUBR>: Add
cast.

* src/type1/t1load.c (parse_subrs): Fix type of `count'.
2016-01-19 19:15:54 +01:00
Werner Lemberg 9adeab6452 Update copyright year. 2016-01-13 11:54:10 +01:00
Alexei Podtelezhnikov 3ea0d2c65a * src/base/ftcalc.c (FT_MulFix) [FT_LONG64]: Improve. 2015-09-13 23:19:34 -04:00
Alexei Podtelezhnikov 09948e426e * src/base/ftcalc.c (FT_RoundFix): Improve. 2015-09-09 21:30:15 -04:00
Wojciech Mamrak 822acb0252 * src/base/ftcalc.c (FT_CeilFix, FT_FloorFix): Normalize.
This commit makes the functions behave as expected, this is,
rounding towards plus or minus infinity.
2015-09-09 07:59:10 +02:00
Alexei Podtelezhnikov 00d899507c [base] Reoptimize aritmetic.
* src/base/ftcalc.c (FT_MulDiv, FT_MulFix) [!FT_LONG64]: Remove
special cases that slow down the general use.
2015-08-16 22:57:34 -04:00
Alexei Podtelezhnikov 7e6c321a58 [base] Fix `ft_corner_orientation'.
Remove casting from `FT_Long' to `FT_Int' that might change the sign
of the return value and make it faster too.

* src/base/ftcalc.c (ft_corner_orientation): On 32-bit systems, stay
with 32-bit arithmetic when safe. Use plain math on 64-bit systems.
* src/pshinter/pshalgo.c: Remove old unused code.
2015-08-03 23:26:13 -04:00
Alexei Podtelezhnikov 2b07a5ae3d * src/base/ftcalc.c (FT_Vector_NormLen): Clarify. 2015-07-28 23:14:30 -04:00
Werner Lemberg a50a045890 Minor. 2015-07-28 07:37:19 +02:00
Alexei Podtelezhnikov e8b186eedb * src/base/ftcalc.c (FT_Vector_NormLen): Explicate type conversions. 2015-07-27 23:22:34 -04:00
Alexei Podtelezhnikov 884e4e67ee [base] Implement fast vector normalization.
The function uses Newton's iterations instead of dividing vector
components by its length, which needs a square root. This is,
literally, a bit less accurate but a lot faster.

* src/base/ftcalc.c (FT_Vector_NormLen): New function.
2015-06-29 22:32:05 -04:00
Werner Lemberg d3240c56e5 [base] Fix Savannah bug #44284.
* src/base/ftcalc.c (FT_MulFix): Typos.
2015-02-17 20:30:36 +01:00
Werner Lemberg 6d7d636b46 [base] Clean up signedness in arithmetic functions.
This makes the code more readable and reduces compiler warnings.

* src/base/ftcalc.c (FT_MulDiv, FT_MulDiv_No_Round, FT_MulFix,
FT_DivFix): Convert input parameters to unsigned, do the
computation, then convert the result back to signed.
(ft_corner_orientation): Fix casts.
2015-02-15 12:30:42 +01:00
Werner Lemberg f57fc59e01 Run `src/tools/update-copyright'. 2015-01-17 20:41:43 +01:00
Alexei Podtelezhnikov 7024155328 [base] Formatting and nanooptimizations.
* src/base/ftcalc.c,
* src/base/fttrigon.c: Revise sign restoration.
2014-12-24 12:11:46 -05:00
Werner Lemberg 9870d6dacf */*: Decorate hex constants with `U' and `L' where appropriate. 2014-12-07 09:40:47 +01:00
Alexei Podtelezhnikov 237c0abfdc Trailing space. 2014-11-19 22:10:29 -05:00
Werner Lemberg d8632a842e Improve comments, remove dead code. 2014-10-25 06:28:18 +02:00
Alexei Podtelezhnikov aba0f498c3 Improve flat corner definition.
* include/internal/ftcalc.h (FT_HYPOT): Macro to approximate Euclidean
distance with the alpha max plus beta min algorithm.
* src/base/ftcalc.c (ft_corner_is_flat): Use it instead of Taxicab metric.
2014-10-24 23:50:57 -04:00
Alexei Podtelezhnikov 7abdb8ccea [base] Significant optimization of `ft_div64by32'
We shift as many bits as we can into the high register, perform
32-bit division with modulo there, then work through the remaining
bits with long division. This optimization is especially noticeable
for smaller dividends that barely use the high register.

* src/base/ftcalc.c (ft_div64by32): Updated.
2014-10-02 23:13:33 -04:00
Werner Lemberg c0ce72a6de Formatting. 2014-10-02 06:44:43 +02:00
Alexei Podtelezhnikov 74d0aad22c * src/base/ftcalc.c: Remove miscellaneous type casts. 2014-10-01 23:27:15 -04:00
Alexei Podtelezhnikov 418e18f3df [base] Use more common `FT_MSB' implementation with masks.
* src/base/ftcalc.c (FT_MSB): Updated.
2014-10-01 22:36:40 -04:00
Alexei Podtelezhnikov 955aff12c0 [base] Clean up.
* src/base/ftcalc.c (FT_MOVE_SIGN): New macro for frequently used code.
2014-09-30 23:09:39 -04:00
Alexei Podtelezhnikov f78ca0dbb9 Remove commented out code. 2014-09-30 22:53:38 -04:00
Alexei Podtelezhnikov 7f49111f81 [base] Avoid unnecessary long division.
This applies to `FT_MulDiv' but not to `FT_DivFix', where overflows or
lack thereof are predicted accurately.

* src/base/ftcalc.c (ft_div64by32): Improve readability.
(FT_MulDiv, FT_MulDiv_No_Round) [!FT_LONG64]: Use straight division
when multiplication stayed within 32 bits.
2014-09-25 22:54:38 -04:00
Alexei Podtelezhnikov 5c894842d3 * src/base/ftcalc.c: Harmonize code. 2014-09-19 22:03:15 -04:00