Since this font driver is by default enabled in `modules.cfg` and its
availability controlled by `FT_CONFIG_OPTION_HVF`, we need to provide some
stubs so that HVF fonts can be correctly rejected if there is no HVF library
available.
Fixes issue #1409.
* src/hvf/hvfdrv.c (hvf_driver_class): Provide `hvf_face_init` and
`hvf_slot_load_glyph` unconditionally.
* src/hvf/hvfload.c, src/hvf/hvfload.h (hvf_slot_load_glyph)
[!FT_CONFIG_OPTION_HVF]: Define stub.
* src/hvf/hvfobjs.c, src/hvf/hvfobjs.h (hvf_face_init)
[!FT_CONFIG_OPTION_HVF]: Define stub.
The new 'hvf' module is a thin wrapper around 'libhvf' with the necessary
boilerplate stuff to integrate it into FreeType. Note that this currently
works on macOS >= 15.4 and iOS >= 18.4 only.
* include/freetype/tttags.h (TTAG_hvgl, TTAG_hvpm): New macros.
* include/freetype/config/ftmodule.h: Add `hvf_driver_class`.
* include/freetype/internal/fttrace.h: Add tracing tags `hvfdrv`, `hvfobjs`,
and `hvfload`
* include/freetype/internal/services/svfntfmt.h (FT_FONT_FORMAT_HVF): New
macro.
* modules.cfg (FONT_MODULES): Add `hvf` module.
* src/sfnt/sfobjc.s (sfnt_init_face): Handle 'hvgl' table.
* src/hvf/*: New files.
==========================
Tag sources with `VER-2-14-3'.
* docs/VERSION.TXT: Add entry for version 2.14.3.
* docs/CHANGES: Updated.
* docs/release, docs/README, builds/macs/README: Updated.
* README, src/base/ftver.rc, builds/windows/vc2010/index.html,
builds/windows/visualc/index.html, builds/windows/visualce/index.html,
builds/wince/vc2005-ce/index.html, builds/wince/vc2008-ce/index.html,
docs/freetype-config.1: s/2.14.2/2.14.3/, s/2142/2143/.
* include/freetype/freetype.h (FREETYPE_PATCH): Set to 3.
* builds/unix/configure.raw (version_info): Set to 26:6:20.
* CMakeLists.txt (VERSION_PATCH): Set to 3.
During charstring processing, the `decoder->len_buildchar` field can be
corrupted. Avoid this by caching this value in a local variable at function
entry.
Based on a patch submitted by David Pokora <david.pokora@trailofbits.com>.
Fixes issue #1405.
==========================
Tag sources with `VER-2-14-2'.
* docs/VERSION.TXT: Add entry for version 2.14.2.
* docs/CHANGES: Updated.
* docs/release, docs/README, builds/macs/README: Updated.
* README, src/base/ftver.rc, builds/windows/vc2010/index.html,
builds/windows/visualc/index.html, builds/windows/visualce/index.html,
builds/wince/vc2005-ce/index.html, builds/wince/vc2008-ce/index.html,
docs/freetype-config.1: s/2.14.1/2.14.2/, s/2141/2142/.
* include/freetype/freetype.h (FREETYPE_PATCH): Set to 2.
* builds/unix/configure.raw (version_info): Set to 26:5:20.
* CMakeLists.txt (VERSION_PATCH): Set to 2.
* src/base/src/base/ftobjs.c (ft_glyphslot_alloc_bitmap): Use preset
dimensions and call FT_MEM_ALLOC_MULT.
* include/freetype/internal/ftobjs.h (ft_glyphslot_alloc_bitmap):
Updated signature...
* src/*: ... and all callers.
Any point on the horizontal or vertical segment, which can either
be either extreme or inflection point is now marked. This makes
separate inflection algorithm unnecessary. This simplifies the
algorithm without noticeable rendering differences.
* src/pshinter/pshalgo.c (psh_glyph_compute_extrema): Rewrite
to detect both extrema and inflection points. Determine the
their direction instantly.
Applying an LCD filter to spans rather than the entire image improves
the performance of ClearType-like rendering by about 40% at 32 ppem
and much more at larger sizes. Small rounding differences are expected.
* src/smooth/ftsmooth.c (ft_smooth_raster_lcd, ft_smooth_lcd_spans,
ft_smooth_raster_lcdv, ft_smooth_lcdv_spans, TOrigin): Implement it.
* include/freetype/internal/ftobjs.h (FT_LibraryRec): lcd_filter_func gone.
* src/base/ftlcdfil.c (ft_lcd_filter_fir): Removed.
(ft_lcd_padding): Use padding sufficient for any 5-tap filter.
(FT_Library_SetLcdFilterWeights, FT_Library_SetLcdFilter): Updated.
* docs/CHANGES: Updated.
This removes the internal face property that sets the filtering weights.
The global filtering algorithms and weights are now optimized to work
well under all conditions.
* include/freetype/internal/ftobjs.h (FT_Face_InternalRec): Do it.
* include/freetype/freetype.h (FT_Face_Properties): Revised docs.
* include/freetype/ftparams.h (FT_PARAM_TAG_LCD_FILTER_WEIGHTS): Ditto.
* src/base/ftlcdfil.c (ft_lcd_padding): Updated.
* src/base/ftobjs.c (ft_open_face_internal, FT_Face_Properties): Ditto.
* src/smooth/ftsmooth.c (ft_smooth_render): Ditto.
* docs/CHANGES: Updated.
