Root cause: Window::bbox() stayed at 0x0 because Window::on_commit()
was never called after surface commits. The Space then never associated
the window with the output (no overlap), so render_elements_for_output
returned empty.
Two fixes:
- Call window.on_commit() in CompositorHandler::commit() to update
the window's bounding box from the committed surface tree
- Call space.refresh() each frame to update output-element mappings
Also: send xdg_toplevel configure with suggested 800x600 size.
renderer_gl and backend_winit pulled in backend_egl, which changed the
ImportAll blanket impl to require ImportEgl — a trait PixmanRenderer
doesn't implement. This caused render_output to silently skip client
surface compositing (only the clear color rendered).
Fix: move renderer_gl and backend_winit behind a "winit" cargo feature.
Default build uses only renderer_pixman, which satisfies ImportAll via
the simpler ImportMemWl + ImportDmaWl blanket impl.
Winit backend: cargo build -p wrsrvd --features winit
Headless (default): cargo build -p wrsrvd
ExportMem::copy_framebuffer may not capture composited client surfaces.
Read pixels directly from the pixman Image's CPU memory after rendering,
since PixmanRenderer composites in-place. This should fix missing
client windows in the remote display.
Start QUIC server in wrsrvd main.rs before dispatching to backend,
passing NetworkHandle to the headless backend. The headless render loop
now encodes each frame as XOR diff against the previous frame, compresses
damage regions with zstd, and sends FrameUpdate messages to connected
clients via the network channel.
Network input from remote clients is drained each iteration of the main
event loop and injected into the compositor via inject_network_input().
Connection state (client connected/disconnected) is tracked to avoid
encoding frames when no client is listening.
Restructure wrsrvd to support two backends: a headless PixmanRenderer
(default) for running without a display server, and the existing Winit
backend (via --backend winit). The render logic is split into per-backend
modules, and the old render.rs is removed.
