Root cause: Every GraphicsUpdate copied the full 8.3MB decoded image
into the front buffer, cloned all 8.3MB for IPC, and transferred all
8.3MB to the frontend — even when only a 100x100 pixel region changed.
During window drag, this created a 25MB/frame pipeline backup.
Fix:
- Track dirty rectangles from ironrdp's GraphicsUpdate(InclusiveRectangle)
- Write path: only copy changed rows from decoded image to front buffer
(e.g. 100 rows × 1920 pixels = 768KB vs 8.3MB full frame)
- Accumulate dirty region as union of all rects since last get_frame
- Read path: if dirty region < 50% of frame, extract only the dirty
rectangle bytes; otherwise fall back to full frame
- Binary IPC format: 8-byte header [x,y,w,h as u16 LE] + pixel data
- Frontend: putImageData at dirty rect offset instead of full frame
- Status bar: h-9 text-sm for 3440x1440 readability
During window drag (typical 300x400 dirty rect):
Before: 8.3MB write + 8.3MB clone + 8.3MB IPC = 24.9MB per frame
After: 480KB write + 480KB extract + 480KB IPC = 1.4MB per frame
~17x reduction in data movement per frame.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Root cause: RDP was unresponsive due to frame pipeline bottleneck.
- get_frame() held tokio::Mutex while cloning 8.3MB, blocking the
RDP session thread from writing new frames (mutex contention)
- Frontend fetched on every backend event with no coalescing
- Every GraphicsUpdate emitted an IPC event, flooding the frontend
Fix:
- Double-buffer: back_buffer (tokio::Mutex, write path) and
front_buffer (std::sync::RwLock, read path) — reads never block writes
- get_frame() now synchronous, reads from front_buffer via RwLock
- Backend throttles frame events to every other GraphicsUpdate
- Frontend coalesces events via requestAnimationFrame
- RdpView props now reactive (computed) for correct resize behavior
- rdp_get_frame command no longer async (no .await needed)
- screenshot_png_base64 no longer async
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- TabBar: move listen() into onMounted, store UnlistenFn
- Session store: track per-session unlisten fns, clean on close
- useRdp: store frame unlisten in composable scope, call in stopFrameLoop
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
RDP performance overhaul:
- Switched from polling (rAF loop calling rdp_get_frame every tick)
to event-driven rendering (backend emits rdp:frame:{id} when
frame buffer updates, frontend fetches on demand)
- Eliminates thousands of empty IPC round-trips per second when
the screen is idle
- Backend passes AppHandle into run_active_session for event emission
- Frontend uses listen() instead of requestAnimationFrame polling
MCP terminal fix:
- terminal_type and terminal_execute now send \r (carriage return)
instead of \n (newline) — PTY terminals expect CR to submit
- Fixes commands not auto-sending, requiring manual Enter press
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
1. Clipboard paste (rdp_send_clipboard): simulates typing each character
via scancode key press/release events. Full ASCII coverage including
all symbols, numbers, and shifted characters. Handles 32-char
generated passwords without manual typing.
2. Keyboard grab defaults to ON so RDP sessions accept keyboard input
immediately without requiring the user to click the toolbar toggle.
3. Frame dirty flag: GraphicsUpdate sets an AtomicBool, get_frame only
encodes + returns base64 when dirty (returns empty string otherwise).
Eliminates ~8MB/frame base64 encoding on unchanged frames at 30fps.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Rust RDP service: ironrdp client with full connection handshake
(TCP -> TLS -> CredSSP -> NLA), pixel buffer frame delivery,
mouse/keyboard input via scancode mapping, graceful disconnect.
Runs in dedicated thread with own tokio runtime to avoid Send
lifetime issues with ironrdp trait objects.
Vue frontend: RdpView canvas renderer with 30fps polling,
mouse/keyboard capture, RdpToolbar with Ctrl+Alt+Del and
clipboard. SessionContainer handles both SSH and RDP tabs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
