The prior mutually exclusive behavior kept surprising people so let's
just flip this around.
This is potentially a "breaking" change for folks, but I think it is
worth it.
Previously, we'd unconditionally enable dual source blending for the
text foreground layer when rendering. That meant that if the user had
configured the fg color to include an alpha value it would get "stamped
through" the draw all the way to the background, making that whole pixel
take on that alpha value rather than allowing it to blend through the
way you might expect.
In prior releases that didn't matter, but since we now allow configuring
the fg color with alpha, and allow using escape sequences to set the fg
for a span to something with alpha, there is now a much higher chance of
something looking weird.
Dual source blending is only really needed for subpixel-aa and that
isn't enabled by default.
This commit changes the behavior to use regular alpha blending if the
main config (rather than a per-font override) hasn't set the freetype
load/render target to one that enables subpixel-aa.
That means that alpha channel values work as expected for fg color
by default.
If you want to enable subpixel-aa you need to enable it globally
and be aware that it will cause weirdness when trying to use alpha
channels for the fg text color.
The docs now also indicate this behavior.
This limitation could be removed by making text rendering significantly
more complex and I don't fancy doing that at this time.
Consolidate the attributes together rather than having them in separate
versioned sections so that it is a bit more readable.
Make a note about how attributes select from existing fonts rather than
apply styling effects to fonts.
refs: https://github.com/wez/wezterm/issues/2348
They prevented using other types of mouse events!
We don't have a good way to specify that kind of alias, so for now,
take it out and replace the examples in the docs with the more verbose
equivalents.
refs: #2173
refs: #2296
Adjusts how mouse events are matched so that we can now indicate whether
mouse reporting and alt-screen should be considered as part of the event
trigger criteria.
refs: #2173
refs: #581
The recent work on the scrollback made it easier to constrain the
search region, so expose those parameters to the Pane::search
interface and to the mux protocol.
Use those new parameters to constrain quickselect search to
1000 rows above and below the current viewport by default, and
add a new parameter to QuickSelectArgs that allows overriding that
range.
A follow-up commit could make the search/copy overlay issue a series
of searches in chunks so that it avoids blocking the UI when
searching very large scrollback.
refs: https://github.com/wez/wezterm/pull/1317
This allows the hook to choose how to handle eg: `wezterm start -- top`.
Previously, if you had implemented this event you would essentially lose
the ability to specify a command that you wanted to launch.
refs: https://github.com/wez/wezterm/issues/284
This simplifies the "change scheme based on dark mode" example
a lot. This was previously impossible to do because we didn't
have a lua module associated with the gui until recently, so
the only way to reference a gui-related object was via an
event callback.
refs: https://github.com/wez/wezterm/issues/2258
