CHANGES BETWEEN 2.5.2 and 2.5.3
I. IMPORTANT BUG FIXES
- A vulnerability was identified and fixed in the new CFF driver
(cf.
http://savannah.nongnu.org/bugs/?41697; it doesn't have a
CVE number yet). All users should upgrade.
- More bug fixes related to correct positioning of composite
glyphs.
- Many fixes to better protect against malformed input.
II. IMPORTANT CHANGES
- FreeType can now use the HarfBuzz library to greatly improve the
auto-hinting of fonts that use OpenType features: Many glyphs
that are part of such features but don't have cmap entries are
now handled properly, for example small caps or superscripts.
Define the configuration macro FT_CONFIG_OPTION_USE_HARFBUZZ to
activate HarfBuzz support.
You need HarfBuzz version 0.9.19 or newer.
Note that HarfBuzz depends on FreeType; this currently causes a
chicken-and-egg problem that can be solved as follows in case
HarfBuzz is not yet installed on your system.
1. Compile and install FreeType without the configuration
macro FT_CONFIG_OPTION_USE_HARFBUZZ.
2. Compile and install HarfBuzz.
3. Define macro FT_CONFIG_OPTION_USE_HARFBUZZ, then compile
and install FreeType again.
With FreeType's `configure' script the procedure boils down to
configure, build, and install Freetype, then configure, compile,
and install HarfBuzz, then configure, compile, and install
FreeType again (after executing `make distclean').
- All libraries FreeType depends on are now checked using the
`pkg-config' configuration files first, followed by alternative
methods.
- The new value `auto' for the various `--with-XXX' library
options (for example `--with-harfbuzz=auto') makes the
`configure' script automatically link to the libraries it finds.
This is now the default.
- In case FreeType's `configure' script can't find a library, you
can pass environment variables to circumvent pkg-config, and
those variables have been harmonized as a consequence of the
changes mentioned above:
LIBZ -> removed; use LIBZ_CFLAGS and LIBZ_LIBS
LIBBZ2 -> removed; use BZIP2_CFLAGS and BZIP2_LIBS
LIBPNG_LDFLAGS -> LIBPNG_LIBS
`./configure --help' shows all available environment variables.
- The `freetype-config' script now understands option `--static'
to emit static linking information.
