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wip: grapheme shaping

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Daniel Eklöf 2020-08-20 19:25:35 +02:00
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22
doc/foot.ini.5.scd
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@ -975,6 +975,28 @@ any of these options.
Default: _no_.
*grapheme-shaping*
Boolean. When enabled, foot will use _utf8proc_ to do grapheme
cluster segmentation while parsing "printed" text. Then, when
rendering, it will use _fcft_ (if compiled with _HarfBuzz_
support) to shape the grapheme clusters.
This is required to render e.g. flag (emoji) sequences, keycap
sequences, modifier sequences, zero-width-joiner (ZWJ) sequences
andn emoji tag sequences.
This is an experimental feature with the following requirements and limitations:
- foot must have been compiled with utf8proc support
- fcft must have been compiled with HarfBuzz support
- This option must be set to true
- Foot will use *wcswidth*(3) to calculate a cluster's display
width. This will typically _not_ match the shaped glyph's width,
but is necessary to not break cursor synchronization with the
application running in foot.
Default: _no_
*max-shm-pool-size-mb*
This option controls the amount of virtual address space used by
the pixmap memory to which the terminal screen content is