2020-09-02 luaotfload v3.15
* The font database is updated more reliably if fonts get deleted.
* In multiple error cases, error messages are shown instead of silently
generating bad output.
* Write glyph ids instead of internal identifiers to DVI files. This
allows using OpenType fonts when working with dvilualatex.
(This requires additional support from the DVI reader)
* The set of font features which are enabled by default has been
changed to be more similar to HarfBuzz.
Especially Above-base mark Positioning (abvm),
Below-base mark Positioning (blwm), Contextual
Alternates (calt), Cursive Positioning (curs),
Distances (dist), and Required Contextual Alternates
(rclt) are now enabled by default for all scripts.
* Added a mathfontdimen font feature which allows emulating
fontdimen values from xetex or traditional TeX math fonts.
* Initial support for variable fonts in node mode.
2020-12-30 luaotfload v3.16
* The fontloader has been synced with the context code from
2020-12-30
* The entry point is called luaotfload.lua instead of
luaotfload-main.lua (but the old name is still provided for
compatibility).
* pre/post_shaping_filter callbacks has been added.
* The number of lua-files and submodules shown in the log-file
has been reduced. But it is extended again by setting the
environment variable LUAOTFLOAD_TRACE_SUBMODULES=1.
* The HarfBuzz based shaper will in some situations drop
hyphenation points. This happens less frequently now since the new
version uses first/second discretionaries (the mechanism described in
the LuaTeX manual, section 5.6 for the of-f-ice example) to support a
limited amount of nesting.
* When the node shaper is used, experimental support for
OpenType variable fonts has been added. To use them, set the
font feature axis to a comma separated list of axis names and values.
(E.g. axis={weight=600}) The supported axis names and value
range depend on the font.
* The font features upper and lower can be used to map
the text of a font to upper or lowercase before displaying it.
Currently this implements the untailored Unicode case mapping
algorithm, but it is planned to add tailoring later.
* A number of small bugfixes.
2021-01-08 luaotfload v3.17
* The fontloader has been synced with the context code from 2021-01-07.
This improves support for advanced CFF based OpenType variable fonts.
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