CHANGES BETWEEN 2.12.0 and 2.12.1
I. IMPORTANT BUG FIXES
- Loading CFF fonts sometimes made FreeType crash (bug introduced in
version 2.12.0)
- Loading a fully hinted TrueType glyph a second time (without
caching) sometimes yielded different rendering results if TrueType
hinting was active (bug introduced in version 2.12.0).
- The generation of the pkg-config file `freetype2.pc` was broken if
the build was done with cmake (bug introduced in version 2.12.0).
II. MISCELLANEOUS
- New option `--with-librsvg` for the `configure` script for better
FreeType demo support.
- The meson build no longer enforces both static and dynamic
versions of the library by default.
- The internal zlib library was updated to version 1.2.12. Note,
however, that FreeType is *not* affected by CVE-2018-25032 since
it only does decompression.
Signed-off-by: Rudi Heitbaum <rudi@heitbaum.com>
CHANGES BETWEEN 2.10.4 and 2.11.0
I. IMPORTANT CHANGES
- A new rendering module has been added to create 8-bit Signed
Distance Field (SDF) bitmaps for both outline and bitmap glyphs.
The new rendering mode is called `FT_RENDER_MODE_SDF`, the pixel
mode is `FT_PIXEL_MODE_GRAY8`, and the corresponding raster flag
is `FT_RASTER_FLAG_SDF`.
This work was Anuj Verma's GSoC 2020 project.
- A new, experimental API is now available for surfacing properties
of 'COLR' v1 color fonts (as the name says, this is an extension
to the 'COLR' table for outline color fonts using the SFNT
container format). 'COLR' v1 fonts are a recently proposed
addition to OFF and OpenType; specification work currently happens
in
https://github.com/googlefonts/colr-gradients-spec/
'COLR' v1 is expected to be merged to OpenType; the ISO
standardisation process for adding 'COLR' v1 as an amendment to
OFF is underway.
Functions similar to the already existing 'COLR' API have been
added to access the corresponding data.
FT_Get_Color_Glyph_Paint
Retrieve the root paint for a given glyph ID.
FT_Get_Paint_Layers
Access the layers of a `PaintColrLayers` table.
FT_Get_Colorline_Stops
Retrieve the 'color stops' on a color line. As an input, a
color stop iterator gets used, which in turn is retrieved from
a paint.
FT_Get_Paint
Dereference an `FT_OpaquePaint` object and retrieve the
corresponding `FT_COLR_Paint` object, which contains details
on how to draw the respective 'COLR' v1 `Paint` table.
II. MISCELLANEOUS
- FreeType has moved its infrastructure to
https://gitlab.freedesktop.org/freetype
A side effect is that the git repositories are now called
`freetype.git` and `freetype-demos.git`, which by default expand
to the directories `freetype` and `freetype-demos`, respectively.
The documentation has been updated accordingly.
FreeType's Savannah repositories will stay; they are now mirrors
of the 'freedesktop.org' repositories.
- A new function `FT_Get_Transform` returns the values set by
`FT_Set_Transform`.
- A new configuration macro `FT_DEBUG_LOGGING` is available. It
provides extended debugging capabilities for FreeType, for example
showing a time stamp or displaying the component a tracing message
comes from. See file `docs/DEBUG` for more information.
This work was Priyesh Kumar's GSoC 2020 project.
- The legacy Type 1 and CFF engines are further demoted due to lack
of CFF2 charstring support. You now need to use `FT_Property_Set`
to enable them besides the `T1_CONFIG_OPTION_OLD_ENGINE` and
`CFF_CONFIG_OPTION_OLD_ENGINE` options, respectively.
- The experimental 'warp' mode (AF_CONFIG_OPTION_USE_WARPER) for the
auto-hinter has been removed.
- The smooth rasterizer performance has been improved by >10%. Note
that due to necessary code changes there might be very subtle
differences in rendering. They are not visible by the eye,
however.
- PCF bitmap fonts compressed with LZW (these are usually files with
the extension `.pcf.Z`) are now handled correctly.
- Improved Meson build files, including support to build the
FreeType demo programs.
- A new demo program `ftsdf` is available to display Signed Distance
Fields of glyphs.
- The `ftlint` demo program has been extended to do more testing of
its input. In particular, it can display horizontal and vertical
acutances for quality assessment, together with computing MD5
checksums of rendered glyphs.
[The acutance measures how sharply the pixel coverage changes at
glyph edges. For monochrome bitmaps, it is always 2.0 in either
X or Y direction. For anti-aliased bitmaps, it depends on the
hinting and the shape of a glyph and might approach or even reach
value 2.0 for glyphs like 'I', 'L', '+', '-', or '=', while it
might be lower for glyphs like 'O', 'S', or 'W'.]
- The `ttdebug` demo program didn't show changed point coordinates
(bug introduced in version 2.10.3).
- It is now possible to adjust the axis increment for variable fonts
in the `ftmulti` demo program.
- It is now possible to change the hinting engine in the `ftstring`
demo program.
- The graphical demo programs work better now in native color depth
on win32 and x11.
Can't set --prefix=$SYSROOT_PREFIX/usr as this creates sysroot-within-sysroot, so
patch it into freetype2.pc.
Once freetype2 is using the correct prefix we can drop the CFLAGS workaround from lcdd.
