A while back I made the line lengths lazily grown; the reduction
in memory was nice, and it helped with render performance for
really wide screens.
Unfortunately, it puts a bunch of reallocation into the hot path
of the parser and updating the terminal model when people run
the inevitable `cat giant-file.txt` benchmark.
This commit reinstates pre-allocating lines to match the physical
terminal width, and tweaks the code a bit to take advantage of
const Cell allocation and to avoid some clones (a really micro
optimization).
For simple graphemes, we can avoid subsequently calling
grapheme_column_width and cache that information in TeenyString.
Make blank TeenyString and Cell initializations const.
Tag CursorPosition with the seqno of the cursor move instead.
This should avoid over-invalidating lines and the selection
if it was just the cursor that moved.
Terminal now maintains a sequence number that increments
for each Action that is applied to it.
Changes to lines are tagged with the current sequence number.
This makes it a bit easier to reason about when an individual
line has changed relative to some point in "time"; the consumer
of the terminal can sample the current sequence number and then
can later determine which lines have changed since that point
in time.
refs: https://github.com/wez/wezterm/issues/867
We were previously only remembering the most recently pressed
button, but that's a lossy thing to do.
This commit remembers the button presses so that we can correctly
report all press/release events.
refs: #973
An implementation detail in wezterm is that it doesn't model
image placements as a separate entity; they are all bound to
the image cells in the terminal model.
The semantics of the kitty image protocol are that placements
are "permanent" wrt. overwriting a cell with text, except for
the explicit EraseInLine/EraseInDisplay sequences that are
used for clearing.
This commit takes a pass at implementing that semantic in
the wezterm data model.
refs: #986
We were actually moving it during placement, and then restoring
the original placement. That could potentially lead to the
screen being scrolled, so we want to avoid that.
refs: #986
As of this commit, `kitty +kitten icat ~/Downloads/fast-parallax.gif`
(wherein the icat kitten decodes the gif into frames and sends them
to the terminal to animate) behaves equivalently in wezterm and kitty.
(There appears to be an issue with the background color/deltas in
the icat kitten in kitty-0.21.1-1.fc33.x86_64 which I have installed,
so both wezterm and kitty have a funky black background for this
particular gif).
refs: #986
Since we can now mutate individual frames, we need to avoid
falsely caching across a change; switch from using (image_id, frame_idx)
to frame_hash.
refs: #986
Adds a use_image feature to termwiz that enables an optional
dep on the image crate. This in turn allows decoding of animation
formats (gif, apng) from file data, but more crucially, allows
modeling animation frames at the termwiz layer, which is a pre-req
for enabling kitty img protocol animation support.
refs: #986
This adds a simple garbage collection scheme; when adding an image,
check to see if we're over budget on the total amount of RAM used
by the image data.
If we are, remove unreferenced images (images that are not placed)
until we're below the budget.
refs: #986
I noticed when running the notcurses demo that we're spending a
decent amount of time decoding png data whenever we need to
re-do the texture atlas.
Let's avoid that by allowing for ImageData at the termwiz layer
to represent both the image file format and decoded rgba8 data.
This commit is a bit muddy and also includes some stuff to try
to delete placements from the model. It's not perfect by any
means--more expensive than I want, and there's something funky
that causes a large number of images to build up during some
phases of the demo.
refs: #986
This isn't complete; many of the placement options are not supported,
and the status reporting is missing in a number of cases, including
querying/probing, and shared memory objects are not supported yet.
However, this commit is sufficient to allow the kitty-png.py script
(that was copied from
https://sw.kovidgoyal.net/kitty/graphics-protocol/#a-minimal-example)
to render a PNG in the terminal.
This implementation routes the basic image display via the same
code that we use for iterm2 and sixel protocols, but it isn't
sufficient to support the rest of the placement options allowed
by the spec.
Notably, we'll need to add the concept of image placements to
the data model maintained by the terminal state and find a way
to efficiently manage placements both by id and by a viewport
range.
The renderer will need to manage separate quads for placements
and order them by z-index, and adjust the render phases so that
images can appear in the correct plane.
refs: #986
This teaches termwiz to recognize and encode the APC
sequences used by the kitty image protocol.
This doesn't include support for animations, just the
transmit, placement and delete requests.
refs: #986
This commit hooks up DECRQM so that we can report that we implement
synchronized updates, and then refines the code that manages sending
data to the terminal model; the first cut at synchronized updates
was a bit simplistic, and now we make a point of "flushing" pending
actions when we start a sync point, and again as soon as we release
the sync point.
This smooths out the jaggies around the orca that I mentioned in
dcbbda7702
and while testing this, I realized that recent parser changes had
mangled processing bundled dec private mode sequences where multiple
modes were specified in the same overall escape sequence. I've
added the missing unit test case for this and made that work again.
refs: https://github.com/wez/wezterm/issues/955
refs: https://github.com/wez/wezterm/issues/882
This implementation doesn't include a timeout, but should be
recoverable via a SoftReset.
There's no query response either: I think I'm missing DECRQM
entirely at the moment.
refs: https://github.com/wez/wezterm/issues/882
This commit introduces a 4th draw pass for rendering sixel and
iterm images that are attached to cells.
Previously, a cell could container either text or an image from
the perspective of the renderer. If it had an image then the glyph
bitmap would be ignored in favor of the image.
However, that causes sixel behavior to diverge from other terminals
(https://github.com/wez/wezterm/issues/942) so we need to be render
both of these.
The simplest way to achieve this is to add a distinct set of texture
coordinates for the attached image and then add a draw pass to alpha
blend it over the glyph content.
The sixel/iterm image processing stage is also adjusted to preserve
the prior cell information and "simply" attach the image info to
the cell. Previously, the cell would be replaced with a blank cell
with the image attached.
The result of this is that the notcurses-demo intro section can
now render the orca "enveloped in the soft glow of glyphs" rather
than caged in a black box.
Note that there are some cases where the render turns blocky but
I suspect that that is due to some other misunderstanding between
wezterm and notcurses and that we'll root cause it as a follow up.
This commit causes a window-config-reloaded event to trigger
when the appearance (dark/light mode) is changed on macos.
It also arranges to propagate the window level config to newly
spawned panes and tabs, created both via the gui and via the
CLI/mux interface.
refs: https://github.com/wez/wezterm/issues/894
refs: https://github.com/wez/wezterm/issues/806
