Commit Graph

4139 Commits

Author SHA1 Message Date
Alexei Podtelezhnikov ab02d9e8e7 [base] Small optimization of BBox calculation.
* src/base/ftbbox.c (BBox_Cubic_Check): Use FT_MSB function in
scaling algorithm.
2013-01-28 06:35:19 -05:00
Infinality c574d72ca8 [truetype] Minor formatting fix. 2013-01-26 17:40:44 -06:00
Infinality 97ba5109bd [truetype] Fix rasterizer_version logic in sph. 2013-01-26 17:05:40 -06:00
Infinality a5fe359596 [truetype] Align more to ClearType whitepaper for sph. 2013-01-26 12:29:52 -06:00
Alexei Podtelezhnikov 610ee58e07 [base] Fix broken emboldening at small sizes.
* src/base/ftoutln.c (FT_Outline_EmboldenXY): Do not attempt to
normalize zero-length vectors.
2013-01-25 23:33:00 -05:00
Werner Lemberg f41ee05475 Fix Savannah bug #38167.
This fixes commit 83c0ebab from 2012-06-27.

* src/truetype/ttinterp.h:
s/TT_CONFIG_OPTION_BYTECODE_INTERPRETER/TT_USE_BYTECODE_INTERPRETER/.
2013-01-25 16:41:24 +01:00
Xi Wang ba931be2af [sfnt] Fix broken pointer overflow checks.
Many compilers such as gcc and clang optimize away pointer overflow
checks `p + n < p', because pointer overflow is undefined behavior.
Use a safe form `n > p_limit - p' instead.

Also avoid possible integer overflow issues, for example, using
`num_glyphs > ( p_limit - p ) / 2' rather than `num_glyphs * 2'
given a large `num_glyphs'.

* src/sfnt/ttsbit0.c (tt_sbit_decoder_load_image): Implement it.
2013-01-25 00:57:09 +01:00
Werner Lemberg 817caa9f4f Fix `make multi'
* src/base/ftoutln.c, src/base/fttrigon.c: Include
FT_INTERNAL_CALC_H.
2013-01-25 00:40:56 +01:00
David 'Digit' Turner 72447195ce [truetype] Fix C++ compilation.
* src/truetype/ttsubpix.h: Updated.
(SPH_X_SCALING_RULES_SIZE): Moved and renamed to...
* src/truetype/ttsubpix.c (X_SCALING_RULES_SIZE): This.
(sph_X_SCALING_Rules): Removed.
(scale_test_tweak): Make function static.
(sph_test_tweak_x_scaling): New function.

* src/truetype/ttgload.c (TT_Process_Simple_Glyph): Updated.
2013-01-25 00:36:35 +01:00
Werner Lemberg 4cd5fd463e Remove trailing whitespace. 2013-01-24 13:33:06 +01:00
Werner Lemberg e9f330adf6 [base] Make `FT_Hypot' really internal.
* include/freetype/fttrigon.h (FT_Hypot): Move to...
* include/freetype/internal/ftcalc.h: This file.

* src/base/fttrigon.c (FT_Hypot): Move to...
* src/base/ftcalc.c: This file.
Include FT_TRIGONOMETRY_H.

* src/truetype/ttgload.c: Don't include FT_TRIGONOMETRY_H.
2013-01-24 09:12:56 +01:00
Werner Lemberg a56f95b268 Minor. 2013-01-24 08:45:29 +01:00
Werner Lemberg 87dc86d68c [truetype] Revert change from 2013-01-22.
FreeType's `height' value is the baseline-to-baseline distance...

* src/truetype/ttobjs.c (tt_size_reset): Undo.
2013-01-24 08:39:43 +01:00
Alexei Podtelezhnikov b6de8e6612 [base, truetype] New internal FT_Hypot function.
* include/freetype/fttrigon.h (FT_Hypot): Declare it.
* src/base/fttrigon.c (FT_Hypot): Define it.
* src/truetype/ttgload.c (TT_Process_Composite_Component): Use it
instead of explicit expressions.
* src/truetype/ttinterp.c (Current_Ratio, Normalize): Use it instead
of TT_VecLen.
(TT_VecLen): Removed.
2013-01-23 23:31:41 -05:00
Alexei Podtelezhnikov dcc0d070e0 Typo. 2013-01-23 23:09:59 -05:00
Alexei Podtelezhnikov da11e5e764 [base] Fix integer overflow.
* src/base/ftoutln.c (FT_Outline_EmboldenXY): Normalize incoming and
outgoing vectors and use fixed point arithmetic.
2013-01-23 20:11:40 -05:00
Alexei Podtelezhnikov e1a2ac1900 [base] Fix integer overflow.
* src/base/ftoutln.c (FT_Outline_Get_Orientation): Scale the
coordinates down to avoid overflow.
2013-01-23 19:51:28 -05:00
Alexei Podtelezhnikov 869fb8c49d [base] Split out MSB function.
* src/base/fttrigon.c (ft_trig_prenorm): Borrow from here.
* include/freetype/internal/ftcalc.h (FT_MSB): Declare here.
* src/base/ftcalc.c (FT_MSB): Define here.
2013-01-23 19:43:28 -05:00
Werner Lemberg e0469372be [truetype] Fix font height.
* src/truetype/ttobjs.c (tt_size_reset): The Windows rendering
engine uses rounded values of the ascender and descender to compute
the TrueType font height.
2013-01-22 11:07:07 +01:00
Werner Lemberg 7190098098 Minor. 2013-01-16 20:08:35 +01:00
Werner Lemberg cd3f871e8d [sfnt] Fix optimized sbit loader.
It was not taking bit_depth into consideration when blitting!

* src/sfnt/ttsbit0.c (tt_sbit_decoder_load_byte_aligned,
* tt_sbit_decoder_load_bit_aligned): Handle bit
depth.
2013-01-16 19:56:08 +01:00
David Turner 3a40612723 [truetype] Improve sub-pixel code.
This patches fixes many issues with the ttsubpix implementation.

1. Data tables are defined, instead of declared, in the header, and
   thus copied into each source file that includes it.

2. These tables were defined as global, mutable, visible variables,
   and thus costing private RAM to every process that loads the
   library (> 50 KB / process, this is huge!).

   Additionally, this also made the library export the symbols
   completely needlessly.

3. Missing `sph_' and `SPH_' prefixes to some of the definitions.

Note that this doesn't try to fix the incredibly inefficient storage
format for the data tables used by the code.  This one will require
another pass in the future.

* src/truetype/ttinterp.h (MAX_NAME_SIZE, MAX_CLASS_MEMBERS):
Renamed to...
(SPH_MAX_NAME_SIZE, SPH_MAX_CLASS_MEMBERS): This.
Update all users.

(SPH_TweakRule, SPH_ScaleRule): Decorate with `const' where
appropriate.

(Font_Class): Rename to...
(SPH_Font_Class): This.  Decorate with `const' where appropriate.

* src/truetype/ttsubpix.h (scale_test_tweak, sph_test_tweak):
Decorate arguments with `const' where appropriate.

Move font tweaking tables to...

* src/truetype/ttsubpic.c: This file and decorate them with `static'
and `const' where appropriate.

(X_SCALING_Rules, X_SCALING_RULES_SIZE): Renamed to...
(spu_X_SCALING_Rules, SPH_X_SCALING_RULES_SIZE): This.
Update all users.
2013-01-16 19:48:31 +01:00
Alexei Podtelezhnikov 0e0fdc5dc8 [truetype] Improve accuracy of normalization of short vectors.
Unit vector components are stored as 2.14 fixed-point numbers. In
order to calculate all 14 bits accurately, a short vector to be
normalized has to be upscaled to at least 14 bits before its length
is calculated. This has been safe since accurate CORDIC algorithms
were adopted.

* src/truetype/ttinterp.c (Normalize): Scale short vectors by 0x4000.
2013-01-12 23:05:55 -05:00
Alexei Podtelezhnikov 081aba390a [truetype] Kill very old vector normalization hacks.
Back in the days, vector length calculations were not very accurate
and the vector normalization function, Normalize, had to meticulously
correct the errors for long vectors [commit b7ef2b0968]. It was no
longer necessary after accurate CORDIC algorithms were adopted, but
the code remained. It is time to kill it.

* src/truetype/ttinterp.c (Normalize): Remove error compensation.
(TT_VecLen): Remove any mention of old less accurate implementation.
2013-01-12 22:36:37 -05:00
Alexei Podtelezhnikov a692170a23 Call it fixed-point. 2013-01-12 19:17:05 -05:00
Werner Lemberg e4ecce3bfe Disable FT_CONFIG_OPTION_OLD_INTERNALS.
After the next release we are going to remove the code completely.

* devel/ftoption.h, include/freetype/config/ftoption.h
(FT_CONFIG_OPTION_OLD_INTERNALS): Comment out.
* docs/CHANGES: Document it.
2013-01-11 09:02:22 +01:00
Werner Lemberg 53c0cb59ed Typos, whitespace. 2013-01-11 08:29:22 +01:00
Alexei Podtelezhnikov ad9d5c9726 [base] Update the overflow protection bit.
The recent optimizations of CORDIC iterations drastically reduce
the expansion factor. The vector components with MSB of 29 are now
safe from overflow.

* src/base/fttrigon.c (FT_TRIG_SAFE_MSB): New macro.
(ft_trig_prenorm): Use it and remove dead code.
2013-01-10 22:29:07 -05:00
Werner Lemberg 4412e74de7 Minor comment improvements. 2013-01-10 20:16:20 +01:00
Alexei Podtelezhnikov 6b83a3674c [base, pshinter] Use FT_ABS, FT_MIN, and FT_MAX for readability.
* src/base/ftbbox.c: Updated.
* src/base/ftobjs.c: Updated.
* src/base/fttrigon.c: Updated.
* src/pshinter/pshalgo.c: Updated.
* src/pshinter/pshrec.c: Updated.
2013-01-09 00:25:32 -05:00
Alexei Podtelezhnikov 09dbb059e1 [base] Clean up trigonometric core.
* src/base/fttrigon.c: Document the algorithm in a large comment.
(FT_TRIG_COSCALE): Remove macro.
(FT_Tan: Use `FT_TRIG_SCALE' instead.
(FT_Cos, FT_Vector_Unit): Ditto and round the return values.
2013-01-08 23:29:44 -05:00
Alexei Podtelezhnikov 5dd9657fe8 [base] Use rounding in CORDIC iterations.
* src/base/fttrigon.c (ft_trig_pseudo_rotate,
ft_trig_pseudo_polarize): Improve accuracy by rounding.
2013-01-02 23:45:14 -05:00
Alexei Podtelezhnikov b4ac30b0ed [base] Reduce trigonometric algorithms.
After we get within 45 degrees by means of true 90-degree rotations,
we can remove initial 45-degree CORDIC iteration and start from
atan(1/2) pseudorotation, reducing expansion factor thereby.

* src/base/fttrigon.c (FT_TRIG_SCALE, FT_TRIG_COSCALE): Update macros.
(ft_trig_pseudo_rotate, ft_trig_pseudo_polarize): Update.

* src/tools/cordic.py: Bring up to date with trigonometric core.

* docs/CHANGES: Old typo.
2013-01-02 22:21:37 -05:00
Alexei Podtelezhnikov 50e634abe1 * src/pshinter/pshalgo.h: Remove unused code. 2013-01-02 20:31:56 -05:00
Werner Lemberg 7d6dc907d8 * src/truetype/ttgload.c (tt_loader_init): Add more tracing. 2012-12-27 01:08:24 +01:00
Werner Lemberg 2ef0a19842 [type1] Fix handling of /FontBBox in MM fonts.
Problem reported by Del Merritt <del@alum.mit.edu>

If we have

  /FontBBox { { 11 12 13 14 15 16 17 18 }
              { 21 22 23 24 25 26 27 28 }
              { 31 32 33 34 35 36 37 38 }
              { 41 42 43 44 45 46 47 48 } }

in the /Blend dictionary,  then the first BBox is { 11 21 31 41 },
the second { 12 22 32 42 }, etc.

* include/freetype/internal/psaux.h (T1_FieldType): Add
`T1_FIELD_TYPE_MM_BBOX' (for temporary use).

* src/psaux/psobjs.c (ps_parser_load_field) <T1_FIELD_TYPE_MM_BBOX>:
Implement it.
2012-12-23 21:14:37 +01:00
Werner Lemberg f44f3f0e43 Formatting, minor internal documentation improvement. 2012-12-23 18:30:34 +01:00
Alexei Podtelezhnikov cbf3fb39fd * src/tools/cordic.py: Bring up to date with trigonometric core. 2012-12-21 14:20:25 -05:00
Werner Lemberg 3ffb822e92 Check parameters of `FT_Outline_New'.
Problem reported by Robin Watts <robin.watts@artifex.com>.

* src/base/ftoutln.c (FT_Outline_New_Internal): Ensure that
`numContours' and `numPoints' fit into FT_Outline's `n_points' and
`n_contours', respectively.
2012-12-21 16:45:27 +01:00
Werner Lemberg c6a66b49e6 * Version 2.4.11 released.
==========================

Tag sources with `VER-2-4-11'.

* docs/CHANGES, docs/release: Updated.

* docs/VERSION.DLL: Update documentation and bump version number to
2.4.11.

* README, Jamfile (RefDoc),
builds/win32/vc2005/freetype.vcproj, builds/win32/vc2005/index.html,
builds/win32/vc2008/freetype.vcproj, builds/win32/vc2008/index.html,
builds/win32/vc2010/freetype.vcxproj, builds/win32/vc2010/index.html,
builds/win32/visualc/freetype.dsp,
builds/win32/visualc/freetype.vcproj,
builds/win32/visualc/index.html, builds/win32/visualce/freetype.dsp,
builds/win32/visualce/freetype.vcproj,
builds/win32/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/2.4.10/2.4.11/, s/2410/2411/.

* include/freetype/freetype.h (FREETYPE_PATCH): Set to 10.

* builds/unix/configure.raw (version_info): Set to 16:0:10.

* builds/toplevel.mk (dist): Don't include `.mailmap'.
2012-12-20 08:31:56 +01:00
Alexei Podtelezhnikov d7383b7b86 [base] Improve trigonometric core.
FreeType used to rely on a 24-step iteration CORDIC algorithm to
calculate trigonometric functions and rotate vectors. It turns out
that once the vector is in the right half-plane, the initial rotation
by 63 degrees is not necessary. The algorithm is perfectly capable
to converge to any angle starting from the second 45 degree rotation.
This patch removes the first rotation and makes it a 23-step CORDIC
algorithm.

* src/base/fttrigon.c (FT_TRIG_SCALE, FT_TRIG_COSCALE): Update macro
values.
(ft_trig_pseudo_rotate, ft_trig_pseudo_polarize): Remove initial
rotation.
2012-12-20 01:03:22 -05:00
Werner Lemberg 768590a99d * src/base/ftobjs.c (ft_property_do): Fix compiler warning. 2012-12-20 06:08:23 +01:00
Werner Lemberg df018924d9 Formatting. 2012-12-20 06:07:33 +01:00
Alexei Podtelezhnikov 32fc416f57 * src/base/ftrfork.c (FT_Raccess_Guess): Switch to FT_Int counters. 2012-12-19 23:05:32 -05:00
Alexei Podtelezhnikov 06174dbb20 [base] Clean up trigonometric core.
* src/base/fttrrigon.c (ft_trig_pseudo_polarize): Align algorithm
with `ft_trig_pseudo_rotate'.
2012-12-19 22:46:27 -05:00
Infinality 1749ae20a7 [truetype] Minor performance enhancement. 2012-12-18 07:23:09 -06:00
Infinality 94b79e7453 [truetype] Remove unusued code and variables. 2012-12-17 19:17:30 -06:00
Werner Lemberg a9f6f85e77 Various compiler warning fixes.
* include/freetype/internal/ftserv.h (FT_SERVICE_UNAVAILABLE): Use
`logical not' operator instead of negation.  The idea is that `~'
returns exactly the data type enforced by the cast to a pointer (be
it 32bit or 64bit or whatever), while a negative integer has not
this flexibility.
* src/cache/ftccmap.c (FTC_CMAP_UNKNOWN): Ditto.
* src/truetype/ttgxvar.c (ALL_POINTS, TT_Get_MM_Var): Ditto.
* src/type/t1load.c (T1_Get_MM_Var): Ditto.
(parse_blend_axis_types): Use cast.
* src/bdf/bdflib.c (_bdf_readstream): Use cast.
2012-12-17 09:08:09 +01:00
Infinality 461cc9365c Merge branch 'master' of ssh://git.sv.nongnu.org/srv/git/freetype/freetype2
Conflicts:
	src/truetype/ttinterp.c
2012-12-16 20:02:42 -06:00
Infinality 71f242c26a [truetype ] Remove unusued code. Add minor fixes. 2012-12-16 19:52:01 -06:00