Some large packages using FreeType have to use a broken (deficient)
/bin/sh. The configure scripts (as generated by Autoconf) are
clever enough to find a better shell and put that one into the
environment variable CONFIG_SHELL. If that environment variable is
already set the script skips the test and assumes to be already
running under a good shell.
* builds/unix/detect.mk: Honour CONFIG_SHELL.
* builds/unix/unix-def.in (SHELL): Define.
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.
The idea is to replace code like
return FT_Err_Foo_Bar;
or
return CFF_Err_Foo_Bar;
with
return FT_THROW( Foo_Bar );
The FT_THROW macro has two functions:
. It hides the module specific prefix.
. In debug mode, it calls the empty function `FT_Throw' which can
be thus used to set a breakpoint.
* include/freetype/internal/ftdebug.h (FT_THROW): New macro.
(FT_Throw): New prototype.
* src/base/ftdebug.c (FT_Throw): New function.
The idea is to always have FT_ERR_PREFIX available internally.
* include/freetype/fterrors.h: Use FT2_BUILD_LIBRARY to guard
undefinition of FT_ERR_PREFIX
* src/gxvalid/gxverror.h, src/otvalid/otverror.h,
src/sfnt/sferrors.h: Updated.
* src/base/ftbbox.c (BBox_Cubic_Check): New bisecting algorithm
for extremum search built around simple condition that defines
which half contains the extremum.
* src/tools/test_bbox.c: Add another cubic outline with exact BBox.
(REPEAT): Increase the number of benchmarking cycles.
(profile_outline): Tweak output formatting.
* builds/unix/configure.raw: Don't generate `freetype-config' and
`freetype.pc'.
* builds/unix/unix-def.in (FT2_EXTRA_LIBS, LIBBZ2, LIBZ,
build_libtool_libs, ft_version): New variables to be substituted.
(freetype-config, freetype.pc): New rules to generate those files.
* builds/unix/freetype-config.in: Remove code for handling `rpath'.
The use of $rpath has been accidentally removed in a patch from
2009-12-22, and apparently noone has missed it since.
Use `%' instead of `@' as a variable substitution marker.
Use quotes.
* builds/unix/freetype.in: Use `%' instead of `@' as a variable
substitution marker.
Use quotes.
BTW, Greg agrees that the OpenType specification is missing the list
of GS variables which will always be reset to the default values
after the `prep' table has been executed.
Up to now, we simply took a snapshot of the Graphics State after the
`prep' table has been executed, and right before a glyph's bytecode
was run it got reloaded. However, as Greg Hitchcock has told us in
private communication, reference points get reset to zero in the MS
rasterizer and we follow in due course. While reasonable, this is
undocumented behaviour.
Most notably, this fixes the rendering of Arial's `x' glyph in
subpixel hinting mode.
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.
* 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.
* 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.
Werner Lemberg