refactor(state): split 1598-LOC state.rs into directory + extract 13 Dispatch impls

Step 4a + 4b combined.

- src/state.rs (1594 LOC) -> src/state/mod.rs (struct + inherent methods +
  types + helpers; 999 LOC) + src/state/dispatch/ (13 Dispatch impls across
  6 files: registry.rs / wl_output.rs / dmabuf.rs / screencopy.rs /
  output_mgr.rs / buffer.rs).

Per Oracle audit: orphan rule permits Dispatch impls in submodules because
Dispatch is a foreign trait on local type State<S>. All State fields the
impls touch are already pub/pub(crate) — no visibility widening needed.

Verification (all green):
- cargo build / cargo build --release
- cargo test (79 lib + 3 integration = 82 pass, 1 ignored — unchanged)
- cargo clippy --all-targets -- -D warnings
- cargo fmt --check
- cargo check --bin vaapi_import_bench --bin sw_encode_bench

src/state/dispatch/buffer.rs

@@ -0,0 +1,19 @@
+use wayland_client::protocol::wl_buffer::WlBuffer;
+use wayland_client::{Dispatch, Proxy, QueueHandle};
+
+use crate::state::{CaptureSource, State};
+
+impl<S: CaptureSource> Dispatch<WlBuffer, ()> for State<S> {
+    fn event(
+        _state: &mut Self,
+        _proxy: &WlBuffer,
+        event: <WlBuffer as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+        if let wayland_client::protocol::wl_buffer::Event::Release = event {
+            tracing::trace!("WlBuffer released");
+        }
+    }
+}

src/state/dispatch/dmabuf.rs

@@ -0,0 +1,115 @@
+use std::mem;
+use std::path::PathBuf;
+
+use wayland_client::{Dispatch, Proxy, QueueHandle};
+use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_buffer_params_v1::{
+    Event as BufferParamsEvent, ZwpLinuxBufferParamsV1,
+};
+use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_dmabuf_feedback_v1::{
+    Event as DmabufFeedbackEvent, ZwpLinuxDmabufFeedbackV1,
+};
+use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_dmabuf_v1::{
+    Event as DmabufEvent, ZwpLinuxDmabufV1,
+};
+
+use crate::state::{CaptureSource, EncConstructionStage, InFlightSurface, State};
+
+impl<S: CaptureSource> Dispatch<ZwpLinuxDmabufV1, ()> for State<S> {
+    fn event(
+        _state: &mut Self,
+        _proxy: &ZwpLinuxDmabufV1,
+        event: <ZwpLinuxDmabufV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+        match event {
+            DmabufEvent::Format { .. } => {}
+            DmabufEvent::Modifier { .. } => {}
+            _ => {}
+        }
+    }
+}
+
+impl<S: CaptureSource> Dispatch<ZwpLinuxDmabufFeedbackV1, ()> for State<S> {
+    fn event(
+        state: &mut Self,
+        _proxy: &ZwpLinuxDmabufFeedbackV1,
+        event: <ZwpLinuxDmabufFeedbackV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+        match event {
+            DmabufFeedbackEvent::MainDevice { device } => {
+                if device.len() >= 8 {
+                    let dev_bytes: [u8; 8] = device[..8].try_into().unwrap_or([0u8; 8]);
+                    let dev = u64::from_ne_bytes(dev_bytes);
+                    let minor = ((dev & 0xFF) | ((dev >> 12) & 0xFFFFFF00)) as u32;
+                    let path = PathBuf::from(format!("/dev/dri/renderD{}", minor));
+                    if path.exists() {
+                        tracing::info!(
+                            "Compositor DRM device: {} (dev_t: {})",
+                            path.display(),
+                            dev
+                        );
+                        state.drm_device_from_compositor = Some(path);
+                    } else {
+                        tracing::warn!(
+                            "Compositor reported DRM device {} (dev_t: {}) but path does not exist",
+                            path.display(),
+                            dev
+                        );
+                    }
+                } else {
+                    tracing::warn!(
+                        "main_device event with unexpected data length: {}",
+                        device.len()
+                    );
+                }
+            }
+            DmabufFeedbackEvent::FormatTable { .. } => {}
+            DmabufFeedbackEvent::Done => {}
+            DmabufFeedbackEvent::TrancheDone => {}
+            DmabufFeedbackEvent::TrancheTargetDevice { .. } => {}
+            DmabufFeedbackEvent::TrancheFormats { .. } => {}
+            DmabufFeedbackEvent::TrancheFlags { .. } => {}
+            _ => {}
+        }
+    }
+}
+
+impl<S: CaptureSource> Dispatch<ZwpLinuxBufferParamsV1, ()> for State<S> {
+    fn event(
+        state: &mut Self,
+        proxy: &ZwpLinuxBufferParamsV1,
+        event: <ZwpLinuxBufferParamsV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+        match event {
+            BufferParamsEvent::Created { .. } => {
+                tracing::debug!("DMA-BUF buffer created");
+            }
+            BufferParamsEvent::Failed => {
+                tracing::error!("DMA-BUF buffer creation failed");
+                let taken = mem::replace(&mut state.in_flight_surface, InFlightSurface::None);
+                match taken {
+                    InFlightSurface::CopyQueued { buffer, frame, .. } => {
+                        drop(buffer);
+                        if let EncConstructionStage::Streaming { cap, .. } = &mut state.stage {
+                            cap.on_done_with_frame(frame);
+                        }
+                    }
+                    other => {
+                        state.in_flight_surface = other;
+                    }
+                }
+                proxy.destroy();
+                state.errored = true;
+            }
+            _ => {}
+        }
+    }
+}

src/state/dispatch/mod.rs

@@ -0,0 +1,6 @@
+mod buffer;
+mod dmabuf;
+mod output_mgr;
+mod registry;
+mod screencopy;
+mod wl_output;

src/state/dispatch/output_mgr.rs

@@ -0,0 +1,109 @@
+use wayland_client::{event_created_child, Dispatch, Proxy, QueueHandle};
+use wayland_protocols::xdg::xdg_output::zv1::client::zxdg_output_manager_v1::ZxdgOutputManagerV1;
+use wayland_protocols_wlr::output_management::v1::client::zwlr_output_head_v1::{
+    self, Event as WlrHeadEvent, ZwlrOutputHeadV1,
+};
+use wayland_protocols_wlr::output_management::v1::client::zwlr_output_manager_v1::{
+    self, Event as WlrOutputManagerEvent, ZwlrOutputManagerV1,
+};
+use wayland_protocols_wlr::output_management::v1::client::zwlr_output_mode_v1::ZwlrOutputModeV1;
+
+use crate::state::{CaptureSource, EncConstructionStage, State, WlrHeadInfo};
+
+impl<S: CaptureSource> Dispatch<ZxdgOutputManagerV1, ()> for State<S> {
+    fn event(
+        _state: &mut Self,
+        _proxy: &ZxdgOutputManagerV1,
+        _event: <ZxdgOutputManagerV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+    }
+}
+
+impl<S: CaptureSource> Dispatch<ZwlrOutputManagerV1, ()> for State<S> {
+    fn event(
+        state: &mut Self,
+        _proxy: &ZwlrOutputManagerV1,
+        event: <ZwlrOutputManagerV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+        match event {
+            WlrOutputManagerEvent::Head { head } => {
+                let _head: ZwlrOutputHeadV1 = head;
+                tracing::debug!("wlr output head advertised");
+            }
+            WlrOutputManagerEvent::Done { .. } => {
+                if let EncConstructionStage::ProbingOutputs {
+                    wlr_manager_done,
+                    outputs,
+                    ..
+                } = &mut state.stage
+                {
+                    *wlr_manager_done = true;
+                    let count = outputs.len();
+                    for idx in 0..count {
+                        state.try_finalize_output(idx);
+                    }
+                }
+            }
+            WlrOutputManagerEvent::Finished => {
+                tracing::warn!("zwlr_output_manager_v1::Finished received during probing");
+            }
+            _ => {}
+        }
+    }
+
+    event_created_child!(State<S>, ZwlrOutputManagerV1, [
+        zwlr_output_manager_v1::EVT_HEAD_OPCODE => (ZwlrOutputHeadV1, ()),
+    ]);
+}
+
+impl<S: CaptureSource> Dispatch<ZwlrOutputHeadV1, ()> for State<S> {
+    fn event(
+        state: &mut Self,
+        proxy: &ZwlrOutputHeadV1,
+        event: <ZwlrOutputHeadV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+        match event {
+            WlrHeadEvent::Name { name } => {
+                if let EncConstructionStage::ProbingOutputs {
+                    wlr_heads,
+                    wlr_head_proxy_to_name,
+                    ..
+                } = &mut state.stage
+                {
+                    wlr_heads.entry(name.clone()).or_insert(WlrHeadInfo {});
+                    wlr_head_proxy_to_name.insert(proxy.id(), name);
+                }
+            }
+            WlrHeadEvent::Position { .. } => {}
+            WlrHeadEvent::Finished => {
+                tracing::debug!("zwlr_output_head_v1::Finished received");
+            }
+            _ => {}
+        }
+    }
+
+    event_created_child!(State<S>, ZwlrOutputHeadV1, [
+        zwlr_output_head_v1::EVT_MODE_OPCODE => (ZwlrOutputModeV1, ()),
+    ]);
+}
+
+impl<S: CaptureSource> Dispatch<ZwlrOutputModeV1, ()> for State<S> {
+    fn event(
+        _state: &mut Self,
+        _proxy: &ZwlrOutputModeV1,
+        _event: <ZwlrOutputModeV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+    }
+}

src/state/dispatch/registry.rs

@@ -0,0 +1,116 @@
+use wayland_client::globals::GlobalListContents;
+use wayland_client::protocol::wl_output::WlOutput;
+use wayland_client::protocol::wl_registry::WlRegistry;
+use wayland_client::{Dispatch, QueueHandle};
+use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_dmabuf_v1::ZwpLinuxDmabufV1;
+use wayland_protocols::xdg::xdg_output::zv1::client::zxdg_output_manager_v1::ZxdgOutputManagerV1;
+use wayland_protocols_wlr::output_management::v1::client::zwlr_output_manager_v1::ZwlrOutputManagerV1;
+use wayland_protocols_wlr::screencopy::v1::client::zwlr_screencopy_manager_v1::ZwlrScreencopyManagerV1;
+
+use crate::state::{CaptureSource, EncConstructionStage, OutputId, PartialOutputInfo, State};
+
+impl<S: CaptureSource> Dispatch<WlRegistry, GlobalListContents> for State<S> {
+    fn event(
+        state: &mut Self,
+        registry: &WlRegistry,
+        event: wayland_client::protocol::wl_registry::Event,
+        _data: &GlobalListContents,
+        _conn: &wayland_client::Connection,
+        qhandle: &QueueHandle<State<S>>,
+    ) {
+        use wayland_client::protocol::wl_registry::Event as RegistryEvent;
+
+        match event {
+            RegistryEvent::Global {
+                name,
+                interface,
+                version,
+            } => match interface.as_str() {
+                "zwlr_screencopy_manager_v1" => {
+                    let v = version.min(3);
+                    tracing::debug!("Binding zwlr_screencopy_manager_v1 v{v} (name={name})");
+                    let mgr: ZwlrScreencopyManagerV1 = registry.bind(name, v, qhandle, ());
+                    if let EncConstructionStage::ProbingOutputs {
+                        screencopy_manager, ..
+                    } = &mut state.stage
+                    {
+                        *screencopy_manager = Some(mgr);
+                    }
+                }
+                "zwp_linux_dmabuf_v1" => {
+                    let v = version.min(4);
+                    tracing::debug!("Binding zwp_linux_dmabuf_v1 v{v} (name={name})");
+                    let proxy: ZwpLinuxDmabufV1 = registry.bind(name, v, qhandle, ());
+                    if let EncConstructionStage::ProbingOutputs {
+                        dmabuf,
+                        dmabuf_feedback,
+                        ..
+                    } = &mut state.stage
+                    {
+                        *dmabuf = Some(proxy.clone());
+                        if v >= 4 {
+                            let feedback = proxy.get_default_feedback(qhandle, ());
+                            *dmabuf_feedback = Some(feedback);
+                        }
+                    }
+                }
+                "wl_output" => {
+                    let v = version.min(4);
+                    tracing::debug!("Binding wl_output v{v} (name={name})");
+                    let output: WlOutput = registry.bind(name, v, qhandle, OutputId(name));
+                    if let EncConstructionStage::ProbingOutputs {
+                        outputs,
+                        bound_outputs,
+                        output_names,
+                        xdg_output_manager,
+                        ..
+                    } = &mut state.stage
+                    {
+                        outputs.push(PartialOutputInfo::default());
+                        bound_outputs.push(output.clone());
+                        output_names.push(name);
+                        if let Some(xdg_mgr) = xdg_output_manager {
+                            let output_id = OutputId(name);
+                            xdg_mgr.get_xdg_output(&output, qhandle, output_id);
+                        }
+                    }
+                }
+                "zxdg_output_manager_v1" => {
+                    let v = version.min(3);
+                    tracing::debug!("Binding zxdg_output_manager_v1 v{v} (name={name})");
+                    let xdg_mgr: ZxdgOutputManagerV1 = registry.bind(name, v, qhandle, ());
+                    if let EncConstructionStage::ProbingOutputs {
+                        bound_outputs,
+                        xdg_output_manager,
+                        output_names,
+                        ..
+                    } = &mut state.stage
+                    {
+                        for (i, output) in bound_outputs.iter().enumerate() {
+                            let oname = output_names.get(i).copied().unwrap_or(0);
+                            let output_id = OutputId(oname);
+                            xdg_mgr.get_xdg_output(output, qhandle, output_id);
+                        }
+                        *xdg_output_manager = Some(xdg_mgr);
+                    }
+                }
+                "zwlr_output_manager_v1" => {
+                    let v = version.min(4);
+                    tracing::debug!("Binding zwlr_output_manager_v1 v{v} (name={name})");
+                    let mgr: ZwlrOutputManagerV1 = registry.bind(name, v, qhandle, ());
+                    if let EncConstructionStage::ProbingOutputs {
+                        wlr_output_manager, ..
+                    } = &mut state.stage
+                    {
+                        *wlr_output_manager = Some(mgr);
+                    }
+                }
+                _ => {}
+            },
+            RegistryEvent::GlobalRemove { name } => {
+                tracing::debug!("Global removed: name={name}");
+            }
+            _ => {}
+        }
+    }
+}

src/state/dispatch/screencopy.rs

@@ -0,0 +1,93 @@
+use wayland_client::{Dispatch, Proxy, QueueHandle};
+use wayland_protocols_wlr::screencopy::v1::client::zwlr_screencopy_frame_v1::{
+    Event as ScreencopyFrameEvent, ZwlrScreencopyFrameV1,
+};
+use wayland_protocols_wlr::screencopy::v1::client::zwlr_screencopy_manager_v1::ZwlrScreencopyManagerV1;
+
+use crate::cap_wlr_screencopy::CapWlrScreencopy;
+use crate::state::{EncConstructionStage, InFlightSurface, State};
+
+impl Dispatch<ZwlrScreencopyFrameV1, ()> for State<CapWlrScreencopy> {
+    fn event(
+        state: &mut Self,
+        proxy: &ZwlrScreencopyFrameV1,
+        event: <ZwlrScreencopyFrameV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<CapWlrScreencopy>>,
+    ) {
+        match event {
+            // SHM buffer offer — in v3 the compositor enumerates supported buffer
+            // types (buffer and/or linux_dmabuf) before buffer_done.  We only
+            // support DMA-BUF, so just log and wait for linux_dmabuf / buffer_done.
+            ScreencopyFrameEvent::Buffer { .. } => {
+                tracing::debug!("Received SHM Buffer offer — only DMA-BUF capture is supported");
+            }
+            ScreencopyFrameEvent::LinuxDmabuf {
+                format,
+                width,
+                height,
+            } => {
+                tracing::debug!("Screencopy LinuxDmabuf: format={format}, {width}x{height}");
+
+                if !matches!(state.in_flight_surface, InFlightSurface::AllocQueued) {
+                    tracing::warn!("Received LinuxDmabuf while no frame allocation was queued");
+                    return;
+                }
+
+                if matches!(state.stage, EncConstructionStage::EverythingButFmt { .. }) {
+                    state.negotiate_format(format, width, height);
+                    if state.errored {
+                        return;
+                    }
+                }
+                if let EncConstructionStage::Streaming { cap, .. } = &mut state.stage {
+                    cap.current_frame = Some(proxy.clone());
+                }
+                state.on_frame_allocd((), format, width, height);
+            }
+            // v3 terminal event: all buffer offers have been enumerated.
+            // If still AllocQueued, the compositor never sent linux_dmabuf —
+            // DMA-BUF screencopy is unsupported, so we must error out.
+            ScreencopyFrameEvent::BufferDone => {
+                if matches!(state.in_flight_surface, InFlightSurface::AllocQueued) {
+                    tracing::error!(
+                        "Compositor did not offer DMA-BUF screencopy (only SHM); \
+                         DMA-BUF capture is required"
+                    );
+                    state.in_flight_surface = InFlightSurface::None;
+                    proxy.destroy();
+                    state.errored = true;
+                }
+            }
+            ScreencopyFrameEvent::Ready {
+                tv_sec_hi,
+                tv_sec_lo,
+                tv_nsec,
+            } => {
+                let tv_sec = (tv_sec_hi as u64) << 32 | tv_sec_lo as u64;
+                let tv_usec = tv_nsec / 1000;
+                tracing::trace!("Screencopy ready: tv_sec={tv_sec}, tv_usec={tv_usec}");
+                state.on_copy_complete(tv_sec, tv_usec);
+            }
+            ScreencopyFrameEvent::Failed => {
+                tracing::error!("Screencopy frame failed");
+                state.on_copy_fail();
+            }
+            ScreencopyFrameEvent::Damage { .. } => {}
+            _ => {}
+        }
+    }
+}
+
+impl<S: crate::state::CaptureSource> Dispatch<ZwlrScreencopyManagerV1, ()> for State<S> {
+    fn event(
+        _state: &mut Self,
+        _proxy: &ZwlrScreencopyManagerV1,
+        _event: <ZwlrScreencopyManagerV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+    }
+}

src/state/dispatch/wl_output.rs

@@ -0,0 +1,133 @@
+use wayland_client::protocol::wl_output::WlOutput;
+use wayland_client::{Dispatch, Proxy, QueueHandle};
+use wayland_protocols::xdg::xdg_output::zv1::client::zxdg_output_v1::{
+    Event as XdgOutputEvent, ZxdgOutputV1,
+};
+
+use crate::state::{CaptureSource, EncConstructionStage, OutputId, State, Transform};
+
+impl<S: CaptureSource> Dispatch<WlOutput, OutputId> for State<S> {
+    fn event(
+        state: &mut Self,
+        _proxy: &WlOutput,
+        event: wayland_client::protocol::wl_output::Event,
+        data: &OutputId,
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+        use wayland_client::protocol::wl_output::Event as OutputEvent;
+        use wayland_client::protocol::wl_output::Mode as WlMode;
+        use wayland_client::protocol::wl_output::Transform as WlTransform;
+
+        let OutputId(target_name) = data;
+        let idx = match &state.stage {
+            EncConstructionStage::ProbingOutputs { output_names, .. } => {
+                output_names.iter().position(|&n| n == *target_name)
+            }
+            _ => None,
+        };
+        let idx = match idx {
+            Some(i) => i,
+            None => return,
+        };
+
+        match event {
+            OutputEvent::Geometry { transform, .. } => {
+                let t = match transform {
+                    wayland_client::WEnum::Value(WlTransform::Normal) => Transform::Normal,
+                    wayland_client::WEnum::Value(WlTransform::_90) => Transform::Normal90,
+                    wayland_client::WEnum::Value(WlTransform::_180) => Transform::Normal180,
+                    wayland_client::WEnum::Value(WlTransform::_270) => Transform::Normal270,
+                    wayland_client::WEnum::Value(WlTransform::Flipped) => Transform::Flipped,
+                    wayland_client::WEnum::Value(WlTransform::Flipped90) => Transform::Flipped90,
+                    wayland_client::WEnum::Value(WlTransform::Flipped180) => Transform::Flipped180,
+                    wayland_client::WEnum::Value(WlTransform::Flipped270) => Transform::Flipped270,
+                    _ => Transform::Normal,
+                };
+                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
+                    if let Some(info) = outputs.get_mut(idx) {
+                        info.transform = Some(t);
+                    }
+                }
+            }
+            OutputEvent::Mode {
+                width,
+                height,
+                flags,
+                ..
+            } => {
+                let is_current = matches!(flags, wayland_client::WEnum::Value(WlMode::Current));
+                if is_current {
+                    if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
+                        if let Some(info) = outputs.get_mut(idx) {
+                            info.mode_size = Some((width, height));
+                        }
+                    }
+                }
+            }
+            OutputEvent::Done => {
+                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
+                    if let Some(info) = outputs.get_mut(idx) {
+                        info.done_count += 1;
+                        if info.done_count >= 1 {
+                            state.try_finalize_output(idx);
+                        }
+                    }
+                }
+            }
+            OutputEvent::Name { name } => {
+                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
+                    if let Some(info) = outputs.get_mut(idx) {
+                        info.wl_name = Some(name);
+                    }
+                }
+            }
+            _ => {}
+        }
+    }
+}
+
+impl<S: CaptureSource> Dispatch<ZxdgOutputV1, OutputId> for State<S> {
+    fn event(
+        state: &mut Self,
+        _proxy: &ZxdgOutputV1,
+        event: <ZxdgOutputV1 as Proxy>::Event,
+        data: &OutputId,
+        _conn: &wayland_client::Connection,
+        _qhandle: &QueueHandle<State<S>>,
+    ) {
+        let target_name = data.0;
+        let idx = match &state.stage {
+            EncConstructionStage::ProbingOutputs { output_names, .. } => {
+                output_names.iter().position(|&n| n == target_name)
+            }
+            _ => None,
+        };
+        let idx = match idx {
+            Some(i) => i,
+            None => return,
+        };
+
+        match event {
+            XdgOutputEvent::Name { name } => {
+                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
+                    if let Some(info) = outputs.get_mut(idx) {
+                        info.name = Some(name);
+                    }
+                }
+            }
+            XdgOutputEvent::LogicalSize { .. } => {}
+            XdgOutputEvent::Done => {
+                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
+                    if let Some(info) = outputs.get_mut(idx) {
+                        info.done_count += 1;
+                        if info.done_count >= 1 {
+                            state.try_finalize_output(idx);
+                        }
+                    }
+                }
+            }
+            _ => {}
+        }
+    }
+}

src/state/mod.rs

@@ -9,34 +9,16 @@ use std::time::Instant;
 
 use anyhow::Result;
 use wayland_client::backend::ObjectId;
-use wayland_client::globals::{GlobalList, GlobalListContents};
+use wayland_client::globals::GlobalList;
 use wayland_client::protocol::wl_buffer::WlBuffer;
 use wayland_client::protocol::wl_output::WlOutput;
-use wayland_client::protocol::wl_registry::WlRegistry;
+use wayland_client::{Dispatch, QueueHandle};
-use wayland_client::{event_created_child, Dispatch, Proxy, QueueHandle};
+use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_buffer_params_v1::Flags as BufferParamsFlags;
-use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_buffer_params_v1::{
+use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_dmabuf_feedback_v1::ZwpLinuxDmabufFeedbackV1;
-    Event as BufferParamsEvent, Flags as BufferParamsFlags, ZwpLinuxBufferParamsV1,
+use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_dmabuf_v1::ZwpLinuxDmabufV1;
-};
-use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_dmabuf_feedback_v1::{
-    Event as DmabufFeedbackEvent, ZwpLinuxDmabufFeedbackV1,
-};
-use wayland_protocols::wp::linux_dmabuf::zv1::client::zwp_linux_dmabuf_v1::{
-    Event as DmabufEvent, ZwpLinuxDmabufV1,
-};
 use wayland_protocols::xdg::xdg_output::zv1::client::zxdg_output_manager_v1::ZxdgOutputManagerV1;
-use wayland_protocols::xdg::xdg_output::zv1::client::zxdg_output_v1::{
+use wayland_protocols_wlr::output_management::v1::client::zwlr_output_manager_v1::ZwlrOutputManagerV1;
-    Event as XdgOutputEvent, ZxdgOutputV1,
+use wayland_protocols_wlr::screencopy::v1::client::zwlr_screencopy_frame_v1::ZwlrScreencopyFrameV1;
-};
-use wayland_protocols_wlr::output_management::v1::client::zwlr_output_head_v1::{
-    self, Event as WlrHeadEvent, ZwlrOutputHeadV1,
-};
-use wayland_protocols_wlr::output_management::v1::client::zwlr_output_manager_v1::{
-    self, Event as WlrOutputManagerEvent, ZwlrOutputManagerV1,
-};
-use wayland_protocols_wlr::output_management::v1::client::zwlr_output_mode_v1::ZwlrOutputModeV1;
-use wayland_protocols_wlr::screencopy::v1::client::zwlr_screencopy_frame_v1::{
-    Event as ScreencopyFrameEvent, ZwlrScreencopyFrameV1,
-};
 use wayland_protocols_wlr::screencopy::v1::client::zwlr_screencopy_manager_v1::ZwlrScreencopyManagerV1;
 
 use ffmpeg_next as ff;
@@ -44,12 +26,13 @@ use ffmpeg_next::ffi;
 
 use crate::args::Args;
 use crate::avhw::{AvHwDevCtx, EncState, EncodedH264Frame, SwEncState};
-use crate::cap_wlr_screencopy::CapWlrScreencopy;
 use crate::fps_limit::FpsLimit;
 use crate::stats::{FrameTimings, PipelineStats};
 use crate::transform::{transpose_if_transform_transposed, Transform};
 use crate::webrtc::WebRtcState;
 
+mod dispatch;
+
 // ---------------------------------------------------------------------------
 // CaptureSource trait
 // ---------------------------------------------------------------------------
@@ -1014,581 +997,3 @@ impl<S: CaptureSource> State<S> {
         true
     }
 }
-
-// ---------------------------------------------------------------------------
-// Dispatch<WlRegistry, GlobalListContents>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<WlRegistry, GlobalListContents> for State<S> {
-    fn event(
-        state: &mut Self,
-        registry: &WlRegistry,
-        event: wayland_client::protocol::wl_registry::Event,
-        _data: &GlobalListContents,
-        _conn: &wayland_client::Connection,
-        qhandle: &QueueHandle<State<S>>,
-    ) {
-        use wayland_client::protocol::wl_registry::Event as RegistryEvent;
-
-        match event {
-            RegistryEvent::Global {
-                name,
-                interface,
-                version,
-            } => match interface.as_str() {
-                "zwlr_screencopy_manager_v1" => {
-                    let v = version.min(3);
-                    tracing::debug!("Binding zwlr_screencopy_manager_v1 v{v} (name={name})");
-                    let mgr: ZwlrScreencopyManagerV1 = registry.bind(name, v, qhandle, ());
-                    if let EncConstructionStage::ProbingOutputs {
-                        screencopy_manager, ..
-                    } = &mut state.stage
-                    {
-                        *screencopy_manager = Some(mgr);
-                    }
-                }
-                "zwp_linux_dmabuf_v1" => {
-                    let v = version.min(4);
-                    tracing::debug!("Binding zwp_linux_dmabuf_v1 v{v} (name={name})");
-                    let proxy: ZwpLinuxDmabufV1 = registry.bind(name, v, qhandle, ());
-                    if let EncConstructionStage::ProbingOutputs {
-                        dmabuf,
-                        dmabuf_feedback,
-                        ..
-                    } = &mut state.stage
-                    {
-                        *dmabuf = Some(proxy.clone());
-                        if v >= 4 {
-                            let feedback = proxy.get_default_feedback(qhandle, ());
-                            *dmabuf_feedback = Some(feedback);
-                        }
-                    }
-                }
-                "wl_output" => {
-                    let v = version.min(4);
-                    tracing::debug!("Binding wl_output v{v} (name={name})");
-                    let output: WlOutput = registry.bind(name, v, qhandle, OutputId(name));
-                    if let EncConstructionStage::ProbingOutputs {
-                        outputs,
-                        bound_outputs,
-                        output_names,
-                        xdg_output_manager,
-                        ..
-                    } = &mut state.stage
-                    {
-                        outputs.push(PartialOutputInfo::default());
-                        bound_outputs.push(output.clone());
-                        output_names.push(name);
-                        if let Some(xdg_mgr) = xdg_output_manager {
-                            let output_id = OutputId(name);
-                            xdg_mgr.get_xdg_output(&output, qhandle, output_id);
-                        }
-                    }
-                }
-                "zxdg_output_manager_v1" => {
-                    let v = version.min(3);
-                    tracing::debug!("Binding zxdg_output_manager_v1 v{v} (name={name})");
-                    let xdg_mgr: ZxdgOutputManagerV1 = registry.bind(name, v, qhandle, ());
-                    if let EncConstructionStage::ProbingOutputs {
-                        bound_outputs,
-                        xdg_output_manager,
-                        output_names,
-                        ..
-                    } = &mut state.stage
-                    {
-                        for (i, output) in bound_outputs.iter().enumerate() {
-                            let oname = output_names.get(i).copied().unwrap_or(0);
-                            let output_id = OutputId(oname);
-                            xdg_mgr.get_xdg_output(output, qhandle, output_id);
-                        }
-                        *xdg_output_manager = Some(xdg_mgr);
-                    }
-                }
-                "zwlr_output_manager_v1" => {
-                    let v = version.min(4);
-                    tracing::debug!("Binding zwlr_output_manager_v1 v{v} (name={name})");
-                    let mgr: ZwlrOutputManagerV1 = registry.bind(name, v, qhandle, ());
-                    if let EncConstructionStage::ProbingOutputs {
-                        wlr_output_manager, ..
-                    } = &mut state.stage
-                    {
-                        *wlr_output_manager = Some(mgr);
-                    }
-                }
-                _ => {}
-            },
-            RegistryEvent::GlobalRemove { name } => {
-                tracing::debug!("Global removed: name={name}");
-            }
-            _ => {}
-        }
-    }
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<WlOutput, ()>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<WlOutput, OutputId> for State<S> {
-    fn event(
-        state: &mut Self,
-        _proxy: &WlOutput,
-        event: wayland_client::protocol::wl_output::Event,
-        data: &OutputId,
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-        use wayland_client::protocol::wl_output::Event as OutputEvent;
-        use wayland_client::protocol::wl_output::Mode as WlMode;
-        use wayland_client::protocol::wl_output::Transform as WlTransform;
-
-        let OutputId(target_name) = data;
-        let idx = match &state.stage {
-            EncConstructionStage::ProbingOutputs { output_names, .. } => {
-                output_names.iter().position(|&n| n == *target_name)
-            }
-            _ => None,
-        };
-        let idx = match idx {
-            Some(i) => i,
-            None => return,
-        };
-
-        match event {
-            OutputEvent::Geometry { transform, .. } => {
-                let t = match transform {
-                    wayland_client::WEnum::Value(WlTransform::Normal) => Transform::Normal,
-                    wayland_client::WEnum::Value(WlTransform::_90) => Transform::Normal90,
-                    wayland_client::WEnum::Value(WlTransform::_180) => Transform::Normal180,
-                    wayland_client::WEnum::Value(WlTransform::_270) => Transform::Normal270,
-                    wayland_client::WEnum::Value(WlTransform::Flipped) => Transform::Flipped,
-                    wayland_client::WEnum::Value(WlTransform::Flipped90) => Transform::Flipped90,
-                    wayland_client::WEnum::Value(WlTransform::Flipped180) => Transform::Flipped180,
-                    wayland_client::WEnum::Value(WlTransform::Flipped270) => Transform::Flipped270,
-                    _ => Transform::Normal,
-                };
-                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
-                    if let Some(info) = outputs.get_mut(idx) {
-                        info.transform = Some(t);
-                    }
-                }
-            }
-            OutputEvent::Mode {
-                width,
-                height,
-                flags,
-                ..
-            } => {
-                let is_current = matches!(flags, wayland_client::WEnum::Value(WlMode::Current));
-                if is_current {
-                    if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
-                        if let Some(info) = outputs.get_mut(idx) {
-                            info.mode_size = Some((width, height));
-                        }
-                    }
-                }
-            }
-            OutputEvent::Done => {
-                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
-                    if let Some(info) = outputs.get_mut(idx) {
-                        info.done_count += 1;
-                        if info.done_count >= 1 {
-                            state.try_finalize_output(idx);
-                        }
-                    }
-                }
-            }
-            OutputEvent::Name { name } => {
-                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
-                    if let Some(info) = outputs.get_mut(idx) {
-                        info.wl_name = Some(name);
-                    }
-                }
-            }
-            _ => {}
-        }
-    }
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<ZxdgOutputV1, OutputId>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<ZxdgOutputV1, OutputId> for State<S> {
-    fn event(
-        state: &mut Self,
-        _proxy: &ZxdgOutputV1,
-        event: <ZxdgOutputV1 as Proxy>::Event,
-        data: &OutputId,
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-        let target_name = data.0;
-        let idx = match &state.stage {
-            EncConstructionStage::ProbingOutputs { output_names, .. } => {
-                output_names.iter().position(|&n| n == target_name)
-            }
-            _ => None,
-        };
-        let idx = match idx {
-            Some(i) => i,
-            None => return,
-        };
-
-        match event {
-            XdgOutputEvent::Name { name } => {
-                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
-                    if let Some(info) = outputs.get_mut(idx) {
-                        info.name = Some(name);
-                    }
-                }
-            }
-            XdgOutputEvent::LogicalSize { .. } => {}
-            XdgOutputEvent::Done => {
-                if let EncConstructionStage::ProbingOutputs { outputs, .. } = &mut state.stage {
-                    if let Some(info) = outputs.get_mut(idx) {
-                        info.done_count += 1;
-                        if info.done_count >= 1 {
-                            state.try_finalize_output(idx);
-                        }
-                    }
-                }
-            }
-            _ => {}
-        }
-    }
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<ZwpLinuxDmabufV1, ()>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<ZwpLinuxDmabufV1, ()> for State<S> {
-    fn event(
-        _state: &mut Self,
-        _proxy: &ZwpLinuxDmabufV1,
-        event: <ZwpLinuxDmabufV1 as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-        match event {
-            DmabufEvent::Format { .. } => {}
-            DmabufEvent::Modifier { .. } => {}
-            _ => {}
-        }
-    }
-}
-
-impl<S: CaptureSource> Dispatch<ZwpLinuxDmabufFeedbackV1, ()> for State<S> {
-    fn event(
-        state: &mut Self,
-        _proxy: &ZwpLinuxDmabufFeedbackV1,
-        event: <ZwpLinuxDmabufFeedbackV1 as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-        match event {
-            DmabufFeedbackEvent::MainDevice { device } => {
-                if device.len() >= 8 {
-                    let dev_bytes: [u8; 8] = device[..8].try_into().unwrap_or([0u8; 8]);
-                    let dev = u64::from_ne_bytes(dev_bytes);
-                    let minor = ((dev & 0xFF) | ((dev >> 12) & 0xFFFFFF00)) as u32;
-                    let path = PathBuf::from(format!("/dev/dri/renderD{}", minor));
-                    if path.exists() {
-                        tracing::info!(
-                            "Compositor DRM device: {} (dev_t: {})",
-                            path.display(),
-                            dev
-                        );
-                        state.drm_device_from_compositor = Some(path);
-                    } else {
-                        tracing::warn!(
-                            "Compositor reported DRM device {} (dev_t: {}) but path does not exist",
-                            path.display(),
-                            dev
-                        );
-                    }
-                } else {
-                    tracing::warn!(
-                        "main_device event with unexpected data length: {}",
-                        device.len()
-                    );
-                }
-            }
-            DmabufFeedbackEvent::FormatTable { .. } => {}
-            DmabufFeedbackEvent::Done => {}
-            DmabufFeedbackEvent::TrancheDone => {}
-            DmabufFeedbackEvent::TrancheTargetDevice { .. } => {}
-            DmabufFeedbackEvent::TrancheFormats { .. } => {}
-            DmabufFeedbackEvent::TrancheFlags { .. } => {}
-            _ => {}
-        }
-    }
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<ZwpLinuxBufferParamsV1, ()>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<ZwpLinuxBufferParamsV1, ()> for State<S> {
-    fn event(
-        state: &mut Self,
-        proxy: &ZwpLinuxBufferParamsV1,
-        event: <ZwpLinuxBufferParamsV1 as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-        match event {
-            BufferParamsEvent::Created { .. } => {
-                tracing::debug!("DMA-BUF buffer created");
-            }
-            BufferParamsEvent::Failed => {
-                tracing::error!("DMA-BUF buffer creation failed");
-                let taken = mem::replace(&mut state.in_flight_surface, InFlightSurface::None);
-                match taken {
-                    InFlightSurface::CopyQueued { buffer, frame, .. } => {
-                        drop(buffer);
-                        if let EncConstructionStage::Streaming { cap, .. } = &mut state.stage {
-                            cap.on_done_with_frame(frame);
-                        }
-                    }
-                    other => {
-                        state.in_flight_surface = other;
-                    }
-                }
-                proxy.destroy();
-                state.errored = true;
-            }
-            _ => {}
-        }
-    }
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<ZwlrScreencopyFrameV1, ()> for CapWlrScreencopy
-// ---------------------------------------------------------------------------
-
-impl Dispatch<ZwlrScreencopyFrameV1, ()> for State<CapWlrScreencopy> {
-    fn event(
-        state: &mut Self,
-        proxy: &ZwlrScreencopyFrameV1,
-        event: <ZwlrScreencopyFrameV1 as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<CapWlrScreencopy>>,
-    ) {
-        match event {
-            // SHM buffer offer — in v3 the compositor enumerates supported buffer
-            // types (buffer and/or linux_dmabuf) before buffer_done.  We only
-            // support DMA-BUF, so just log and wait for linux_dmabuf / buffer_done.
-            ScreencopyFrameEvent::Buffer { .. } => {
-                tracing::debug!("Received SHM Buffer offer — only DMA-BUF capture is supported");
-            }
-            ScreencopyFrameEvent::LinuxDmabuf {
-                format,
-                width,
-                height,
-            } => {
-                tracing::debug!("Screencopy LinuxDmabuf: format={format}, {width}x{height}");
-
-                if !matches!(state.in_flight_surface, InFlightSurface::AllocQueued) {
-                    tracing::warn!("Received LinuxDmabuf while no frame allocation was queued");
-                    return;
-                }
-
-                if matches!(state.stage, EncConstructionStage::EverythingButFmt { .. }) {
-                    state.negotiate_format(format, width, height);
-                    if state.errored {
-                        return;
-                    }
-                }
-                if let EncConstructionStage::Streaming { cap, .. } = &mut state.stage {
-                    cap.current_frame = Some(proxy.clone());
-                }
-                state.on_frame_allocd((), format, width, height);
-            }
-            // v3 terminal event: all buffer offers have been enumerated.
-            // If still AllocQueued, the compositor never sent linux_dmabuf —
-            // DMA-BUF screencopy is unsupported, so we must error out.
-            ScreencopyFrameEvent::BufferDone => {
-                if matches!(state.in_flight_surface, InFlightSurface::AllocQueued) {
-                    tracing::error!(
-                        "Compositor did not offer DMA-BUF screencopy (only SHM); \
-                         DMA-BUF capture is required"
-                    );
-                    state.in_flight_surface = InFlightSurface::None;
-                    proxy.destroy();
-                    state.errored = true;
-                }
-            }
-            ScreencopyFrameEvent::Ready {
-                tv_sec_hi,
-                tv_sec_lo,
-                tv_nsec,
-            } => {
-                let tv_sec = (tv_sec_hi as u64) << 32 | tv_sec_lo as u64;
-                let tv_usec = tv_nsec / 1000;
-                tracing::trace!("Screencopy ready: tv_sec={tv_sec}, tv_usec={tv_usec}");
-                state.on_copy_complete(tv_sec, tv_usec);
-            }
-            ScreencopyFrameEvent::Failed => {
-                tracing::error!("Screencopy frame failed");
-                state.on_copy_fail();
-            }
-            ScreencopyFrameEvent::Damage { .. } => {}
-            _ => {}
-        }
-    }
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<ZxdgOutputManagerV1, ()>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<ZxdgOutputManagerV1, ()> for State<S> {
-    fn event(
-        _state: &mut Self,
-        _proxy: &ZxdgOutputManagerV1,
-        _event: <ZxdgOutputManagerV1 as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-    }
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<ZwlrOutputManagerV1, ()>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<ZwlrOutputManagerV1, ()> for State<S> {
-    fn event(
-        state: &mut Self,
-        _proxy: &ZwlrOutputManagerV1,
-        event: <ZwlrOutputManagerV1 as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-        match event {
-            WlrOutputManagerEvent::Head { head } => {
-                let _head: ZwlrOutputHeadV1 = head;
-                tracing::debug!("wlr output head advertised");
-            }
-            WlrOutputManagerEvent::Done { .. } => {
-                if let EncConstructionStage::ProbingOutputs {
-                    wlr_manager_done,
-                    outputs,
-                    ..
-                } = &mut state.stage
-                {
-                    *wlr_manager_done = true;
-                    let count = outputs.len();
-                    for idx in 0..count {
-                        state.try_finalize_output(idx);
-                    }
-                }
-            }
-            WlrOutputManagerEvent::Finished => {
-                tracing::warn!("zwlr_output_manager_v1::Finished received during probing");
-            }
-            _ => {}
-        }
-    }
-
-    event_created_child!(State<S>, ZwlrOutputManagerV1, [
-        zwlr_output_manager_v1::EVT_HEAD_OPCODE => (ZwlrOutputHeadV1, ()),
-    ]);
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<ZwlrOutputHeadV1, ()>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<ZwlrOutputHeadV1, ()> for State<S> {
-    fn event(
-        state: &mut Self,
-        proxy: &ZwlrOutputHeadV1,
-        event: <ZwlrOutputHeadV1 as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-        match event {
-            WlrHeadEvent::Name { name } => {
-                if let EncConstructionStage::ProbingOutputs {
-                    wlr_heads,
-                    wlr_head_proxy_to_name,
-                    ..
-                } = &mut state.stage
-                {
-                    wlr_heads.entry(name.clone()).or_insert(WlrHeadInfo {});
-                    wlr_head_proxy_to_name.insert(proxy.id(), name);
-                }
-            }
-            WlrHeadEvent::Position { .. } => {}
-            WlrHeadEvent::Finished => {
-                tracing::debug!("zwlr_output_head_v1::Finished received");
-            }
-            _ => {}
-        }
-    }
-
-    event_created_child!(State<S>, ZwlrOutputHeadV1, [
-        zwlr_output_head_v1::EVT_MODE_OPCODE => (ZwlrOutputModeV1, ()),
-    ]);
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<ZwlrOutputModeV1, ()>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<ZwlrOutputModeV1, ()> for State<S> {
-    fn event(
-        _state: &mut Self,
-        _proxy: &ZwlrOutputModeV1,
-        _event: <ZwlrOutputModeV1 as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-    }
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<ZwlrScreencopyManagerV1, ()>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<ZwlrScreencopyManagerV1, ()> for State<S> {
-    fn event(
-        _state: &mut Self,
-        _proxy: &ZwlrScreencopyManagerV1,
-        _event: <ZwlrScreencopyManagerV1 as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-    }
-}
-
-// ---------------------------------------------------------------------------
-// Dispatch<WlBuffer, ()>
-// ---------------------------------------------------------------------------
-
-impl<S: CaptureSource> Dispatch<WlBuffer, ()> for State<S> {
-    fn event(
-        _state: &mut Self,
-        _proxy: &WlBuffer,
-        event: <WlBuffer as Proxy>::Event,
-        _data: &(),
-        _conn: &wayland_client::Connection,
-        _qhandle: &QueueHandle<State<S>>,
-    ) {
-        if let wayland_client::protocol::wl_buffer::Event::Release = event {
-            tracing::trace!("WlBuffer released");
-        }
-    }
-}