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doc: foot.ini: gamma-correct-blending: mention colors being off

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Daniel Eklöf 2025-04-19 09:16:28 +02:00
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@ -220,11 +220,12 @@ empty string to be set, but it must be quoted: *KEY=""*)
than intended when rendered with gamma-correct blending, since the
font designer set the font weight based on incorrect rendering.
You may also want to enable 10-bit image buffers when
gamma-correct blending is enabled. Though probably only if you do
not use a transparent background (with 10-bit buffers, you only
get 2 bits alpha). See *tweak.surface-bit-depth*.
Note that some colors (especially dark ones) will look a bit
off. The reason for this is loss of color precision, due to foot
using 8-bit surfaces (i.e. each color channel is 8 bits). The
amount of errors can be reduced by using 10-bit surfaces; see
*tweak.surface-bit-depth*.
Default: enabled when compositor support is available
*box-drawings-uses-font-glyphs*
@ -1978,13 +1979,13 @@ any of these options.
best option.
When *gamma-correct-blending* is enabled, you may want to enable
10-bit surfaces, as that improves the color resolution. Be aware
10-bit surfaces, as that improves color precision. Be aware
however, that in this mode, the alpha channel is only 2 bits
instead of 8 bits. Thus, if you are using a transparent
background, you may want to use the default, *8-bit*, even if you
have gamma-correct blending enabled.
You should also note that 10-bit surface is slower. This will
You should also note that 10-bit surface is much slower. This will
increase input latency and decrease rendering throughput.
Default: _8-bit_