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|
use tracing::warn;
use super::{HeadlessServer, RenderImpact};
use crate::api;
use crate::protocol::{ServerMessage, MAX_GRAPHICS_FRAME_SIZE};
use crate::server::clients::{render_targets, ClientConnectionMode, DeferredRender};
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub(super) enum RetainedGraphicsOutcome {
Sent,
Deferred,
Fallback,
}
pub(super) fn frame_pane_graphics_for_client(bytes: Vec<u8>) -> Vec<u8> {
if bytes.is_empty() {
return bytes;
}
let mut framed = Vec::with_capacity(bytes.len() + 4);
framed.extend_from_slice(b"\x1b7");
framed.extend_from_slice(&bytes);
framed.extend_from_slice(b"\x1b8");
framed
}
impl HeadlessServer {
pub(super) fn pane_graphics_runtime_active(&self) -> bool {
!self.app.state.pane_graphics_layers.is_empty()
|| !self.app.state.pane_graphics_streams.is_empty()
}
pub(super) fn cancel_inactive_pane_graphics_streams(&self) {
api::cancel_inactive_pane_graphics_streams(|owner| {
self.app
.state
.pane_graphics_streams
.values()
.any(|active_owner| active_owner == owner)
});
}
pub(super) fn handle_pane_graphics_stream_frame(
&mut self,
msg: api::ApiRequestMessage,
) -> RenderImpact {
if self.shutting_down {
let _ = self.handle_api_request_with_shutdown_check_inner(msg, false);
return RenderImpact::None;
}
let internal_changed = self.drain_all_internal_events_with_forwarding();
let response = self
.app
.handle_api_request_after_internal_events_drained(msg.request);
let succeeded = serde_json::from_str::<api::schema::SuccessResponse>(&response).is_ok();
let _ = msg.respond_to.send(response);
if internal_changed {
RenderImpact::Full
} else if succeeded {
RenderImpact::Graphics
} else {
RenderImpact::None
}
}
pub(super) fn render_retained_graphics_update_and_stream(&mut self) -> RetainedGraphicsOutcome {
crate::render_prof::event("retained_graphics.attempt");
if self.app.full_redraw_pending {
crate::render_prof::event("retained_graphics_fallback.full_redraw_pending");
return RetainedGraphicsOutcome::Fallback;
}
let render_targets = render_targets(&self.clients, self.foreground_client_id);
let mut app_view_size = None;
for (_, terminal_size, _, _, mode) in &render_targets {
if !matches!(mode, ClientConnectionMode::App) {
continue;
}
if app_view_size.is_some_and(|size| size != *terminal_size) {
crate::render_prof::event("retained_graphics_fallback.mixed_app_geometry");
return RetainedGraphicsOutcome::Fallback;
}
app_view_size = Some(*terminal_size);
}
let mut deferred = false;
let mut prepared = Vec::new();
for (client_id, (cols, rows), cell_size, _is_foreground, mode) in render_targets {
if !matches!(mode, ClientConnectionMode::App) {
continue;
}
let Some(client) = self.clients.get_mut(&client_id) else {
crate::render_prof::event("retained_graphics_fallback.client_missing");
return RetainedGraphicsOutcome::Fallback;
};
if client.deferred_render() != DeferredRender::None {
deferred = true;
continue;
}
if client.graphics_surface_reset_pending || !cell_size.is_known() {
crate::render_prof::event("retained_graphics_fallback.client_state");
return RetainedGraphicsOutcome::Fallback;
}
let Some(last_frame) = client.render_state.last_frame() else {
crate::render_prof::event("retained_graphics_fallback.no_last_frame");
return RetainedGraphicsOutcome::Fallback;
};
if last_frame.width != cols || last_frame.height != rows {
crate::render_prof::event("retained_graphics_fallback.frame_size_mismatch");
return RetainedGraphicsOutcome::Fallback;
}
if client.writer.is_none() {
crate::render_prof::event("retained_graphics_fallback.writer_missing");
return RetainedGraphicsOutcome::Fallback;
}
let mut next_graphics_cache = client.graphics_cache.clone();
let encode_started = crate::render_prof::timer();
let bytes =
frame_pane_graphics_for_client(crate::kitty_graphics::encode_local_pane_graphics(
&self.app.state,
&self.app.terminal_runtimes,
self.app.state.view.tab_surface(),
cell_size,
&mut next_graphics_cache,
));
crate::render_prof::duration_since("retained_graphics.graphics_encode", encode_started);
if bytes.len() > MAX_GRAPHICS_FRAME_SIZE {
warn!(
client_id,
graphics_bytes = bytes.len(),
max = MAX_GRAPHICS_FRAME_SIZE,
"dropping oversized retained graphics payload"
);
continue;
}
let serialized = if bytes.is_empty() {
None
} else {
let serialize_started = crate::render_prof::timer();
let framed = match Self::frame_server_message_with_max(
&ServerMessage::Graphics { bytes },
MAX_GRAPHICS_FRAME_SIZE,
) {
Ok(framed) => framed,
Err(err) => {
warn!(client_id, err = %err, "failed to serialize retained graphics");
return RetainedGraphicsOutcome::Fallback;
}
};
crate::render_prof::duration_since(
"retained_graphics.serialize",
serialize_started,
);
Some(framed)
};
prepared.push((client_id, serialized, next_graphics_cache));
}
let mut broken_clients = Vec::new();
for (client_id, serialized, next_graphics_cache) in prepared {
let Some(client) = self.clients.get_mut(&client_id) else {
continue;
};
let Some(serialized) = serialized else {
client.graphics_cache = next_graphics_cache;
client.clear_deferred_render();
continue;
};
let Some(writer) = client.writer.as_ref().cloned() else {
broken_clients.push(client_id);
continue;
};
match writer.render.try_send(serialized) {
Ok(()) => {
client.graphics_cache = next_graphics_cache;
client.clear_deferred_render();
crate::render_prof::event("retained_graphics.sent");
}
Err(std::sync::mpsc::TrySendError::Full(_)) => {
client.defer_pane_graphics_render();
deferred = true;
crate::render_prof::event("retained_graphics.deferred");
}
Err(std::sync::mpsc::TrySendError::Disconnected(_)) => {
broken_clients.push(client_id);
}
}
}
for client_id in broken_clients {
self.remove_client_and_resize_if_needed(client_id);
}
if deferred {
RetainedGraphicsOutcome::Deferred
} else {
RetainedGraphicsOutcome::Sent
}
}
}
|
