#1151: Preferences › Performance › Linux display server opens the window through Xwayland, where file drops work

winit 0.30 delivers no file drops on native Wayland. The new Linux Display
Server preference (Automatic / X11 (XWayland), shown on Linux only, read at
startup) has winit open the window on X11 when the session is Wayland,
DISPLAY is set and the X11 libraries winit loads are installed (ldconfig
check ported from PhotoCraft); otherwise the window opens on Wayland and
the log says why. README, development notes, parity docs, ROADMAP and the
complete catalogs updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/target-app-parity.md

@@ -353,7 +353,7 @@ since 2026-10-01.
 | **Bundled content:** brush, symbol, style and swatch libraries | ~30% | Ours are original and generated in code, and far fewer than Illustrator ships; brush and symbol libraries are still missing |
 | **Performance** | unverified | Multithreaded, off-thread rendering and caches are in place. The last budget run (2026-10-01, loaded machine) measured 290 ms for a 50k-path fit against a 16 ms budget. Re-run `vectorcraft-cli perf` on an idle machine |
 | **Robustness** | good, new | ~2,840 tests, property tests, no panics in shipped code (lints, the `guard` safety net, import fuzzing), Data Recovery. Missing: a corpus of real-world files, Windows/Linux/browser QA |
-| **Platforms and 1.0 polish** | ~60% | The macOS app and the web build work, and Finder opens every readable format with the macOS app (#295, #354); on macOS the menus are in the system menu bar, laid out as a Mac app's, with the in-window menus as a fallback (`--in-window-menus`; verified on Windows and by cross-compilation, not yet by hand on a Mac); hybrid-graphics laptops render on the power-saving GPU by default on Windows and macOS (#306), and Windows starts on Direct3D 12, falling back to OpenGL, and loads no Vulkan driver unless `WGPU_BACKEND` asks for it (#545: Vulkan flickered black on an Intel GPU, DX12 and OpenGL didn't; #806: a faulty Vulkan driver crashed the app before its window appeared; verified by unit tests and the reporter's runs with `WGPU_BACKEND`), and Linux on the GPU the desktop runs on, since a Wayland compositor may refuse frames from the other one; a window that fails on its GPU while starting up starts again on the next one instead of crashing (#502; the dual-GPU Wayland case is verified by unit tests and cross-compilation, not on such hardware); web drops land in the document they were dropped on (#359); desktop drops carry no pointer position (winit 0.30), so a dropped document opens as a tab of its own and a picture or text is placed in the middle of the view, while the web places anything dropped on the canvas and opens what is dropped off it, as Illustrator does (#472); a web page that loses its WebGPU device or WebGL context restarts its graphics with the same documents (#369); on Linux/Wayland the clipboard reads the compositor's own (data-control) and copied image files paste, but files can't be dropped on the window under Wayland until eframe moves to winit 0.31 (#398; the Wayland side is verified by compilation only); on Linux the Paste menu checks the system clipboard on a background thread, so a clipboard owner that never answers no longer freezes the window, while Windows and macOS keep their quick in-line check (#510; the X11 hang verified by the contributor, here by headless tests); on KDE Plasma 6.3+ under Wayland, pens and pen displays reach the app only under XWayland (`WAYLAND_DISPLAY=`) or with KWin's `KWIN_WAYLAND_EMULATE_TABLET=1`, since winit 0.30 has no Wayland tablet input (#491, not verified on hardware); Windows/Linux packaging and accessibility are pending; an experimental, unsupported Windows 7 x64 OpenGL build exists (community-contributed, not verified by maintainers) |
+| **Platforms and 1.0 polish** | ~60% | The macOS app and the web build work, and Finder opens every readable format with the macOS app (#295, #354); on macOS the menus are in the system menu bar, laid out as a Mac app's, with the in-window menus as a fallback (`--in-window-menus`; verified on Windows and by cross-compilation, not yet by hand on a Mac); hybrid-graphics laptops render on the power-saving GPU by default on Windows and macOS (#306), and Windows starts on Direct3D 12, falling back to OpenGL, and loads no Vulkan driver unless `WGPU_BACKEND` asks for it (#545: Vulkan flickered black on an Intel GPU, DX12 and OpenGL didn't; #806: a faulty Vulkan driver crashed the app before its window appeared; verified by unit tests and the reporter's runs with `WGPU_BACKEND`), and Linux on the GPU the desktop runs on, since a Wayland compositor may refuse frames from the other one; a window that fails on its GPU while starting up starts again on the next one instead of crashing (#502; the dual-GPU Wayland case is verified by unit tests and cross-compilation, not on such hardware); web drops land in the document they were dropped on (#359); desktop drops carry no pointer position (winit 0.30), so a dropped document opens as a tab of its own and a picture or text is placed in the middle of the view, while the web places anything dropped on the canvas and opens what is dropped off it, as Illustrator does (#472); a web page that loses its WebGPU device or WebGL context restarts its graphics with the same documents (#369); on Linux/Wayland the clipboard reads the compositor's own (data-control) and copied image files paste, but files can't be dropped on the window under native Wayland until eframe moves to winit 0.31 (#398; the Wayland side is verified by compilation only), so Preferences › Performance › Linux Display Server › X11 (XWayland) opens the window through XWayland, where drops work (#1151; verified by unit tests and cross-compilation, not on a Wayland desktop); on Linux the Paste menu checks the system clipboard on a background thread, so a clipboard owner that never answers no longer freezes the window, while Windows and macOS keep their quick in-line check (#510; the X11 hang verified by the contributor, here by headless tests); on KDE Plasma 6.3+ under Wayland, pens and pen displays reach the app only under XWayland (`WAYLAND_DISPLAY=`) or with KWin's `KWIN_WAYLAND_EMULATE_TABLET=1`, since winit 0.30 has no Wayland tablet input (#491, not verified on hardware); Windows/Linux packaging and accessibility are pending; an experimental, unsupported Windows 7 x64 OpenGL build exists (community-contributed, not verified by maintainers) |
 | **Agent automation** | beyond Illustrator | Every command, gesture and dialog is drivable over MCP, the CLI and the control channel; what an agent reads and writes on disk can be confined to chosen folders (`--automation-read-root` / `--automation-write-root`, as in PhotoCraft, #832) |
 | **Scrubby numeric fields** | beyond Illustrator | As in Photoshop, dragging a numeric field's label (`W:`, `Opacity:`, the Character panel's icons) left or right steps its value live; one undo step per drag, Escape cancels (#400) |
 
@@ -460,6 +460,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-11 | minor | Platforms: Preferences › Performance › Linux Display Server opens the window through XWayland, where file drops work (#1151); score unchanged (estimated) |
 | 2026-10-11 | minor | Drawing tools: Live Corners on corners between curved sides (#1144) leaves the missing list; score and hours unchanged at this rounding (estimated) |
 | 2026-10-11 | minor | Type advanced: Proportional Metrics in vertical type (`vpal`, #966) leaves the missing list; score and hours unchanged at this rounding (estimated) |
 | 2026-10-11 | minor | Shape Builder #893 fixed (planar-map faces share their corners exactly, so merges leave no seams); Path operations stays 80% and Shape Builder 70% while #937 is open (estimated) |