Conversation
The jpackage Linux launcher pipe-transfers the serialized config with a single read; with many jars it exceeds the pipe capacity, truncates, and SIGSEGVs in jvmLauncherStartJvm. Collapse app.classpath to a directory wildcard in the packaged .cfg files.
XWayland never alpha-blends child windows, so the composite-redirect + snapshot pipeline paid a per-frame cost and misbehaved on some drivers. Present the controls as a separate managed borderless toplevel, transient for the app window and geometry-synced to the host canvas: the compositor blends its ARGB surface with real alpha, and normal window management covers/minimizes/stacks it with the app instead of floating over other applications. NUVIO_OVERLAY_SNAPSHOT=1 restores the legacy pipeline.
The managed transient overlay would otherwise appear as its own alt-tab entry next to the app window. _KDE_NET_WM_STATE_SKIP_SWITCHER is appended post-map (EWMH client-initiated state change) so GDK's initial _NET_WM_STATE write cannot drop it, and is ignored harmlessly by compositors that do not know the atom.
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yeah... no, we tried this approach. It does not work. It causes too many problems |
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Tested this branch on a setup not covered by the original validation: hybrid GPU laptop on Hyprland. Setup: Arch Linux, Hyprland (Wayland), Nuvio 0.1.21-alpha via XWayland, Intel Iris Xe + NVIDIA RTX 2050 (proprietary driver), system libmpv 0.41. How: compiled Result: on the stock snapshot pipeline the controls overlay was completely invisible on this driver combo (video played, GUI never rendered). With this PR the controls render and are fully interactive, and the player closes back to the library correctly. Log confirms toplevel mode engaged: Happy to share build flags or fuller logs if useful. |
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Problem
On XWayland the Linux player's controls were composited by snapshotting a composite-redirected WebKitGTK child window into mpv (
overlay-add). That pipeline:Solution
Present the controls as a separate managed borderless toplevel, transient for the app window (
XSetTransientForHint) and geometry-synced to the host canvas:skip_taskbar/skip_pagerhints plus KDE's_KDE_NET_WM_STATE_SKIP_SWITCHERkeep it out of the taskbar, pager, and alt-tab switcherNUVIO_WEBKIT_ALLOW_GPUopts out);NUVIO_OVERLAY_SNAPSHOT=1restores the legacy snapshot pipeline as an escape hatchTesting
Validated interactively on KWin/Wayland + Mesa (amdgpu): controls render and animate at full frame rate during 4K playback, minimize/restore and alt-tab behave like any owned window, keyboard shortcuts and cursor show/hide work through player open/close cycles.
Note: stacked on #511 (jpackage classpath fix) — that commit is included here since this work was verified in packaged builds.