DroidDeck/tools/gamescope/PATCHES.md

gamescope patches carried by the app

Built by .github/workflows/build-gamescope.yml on top of the exact gamescope the Linux runtime ships (3.16.29, Arch Linux ARM's package, same build options), and staged from the apk over /usr/local/bin/gamescope at each session start - the hosted runtime image is never touched. The binary's shared-library needs are checked against runtime-sonames.txt, the runtime's own library list, before anything is published.

• 0002-steamcompmgr-fallback-appid-focus.patch - Armada (armada-os/armada), verbatim.

• 0009-fix-arm64-steam-night-mode.patch - Armada, verbatim: the ARM64 client packs the night-mode property differently; the slider did nothing.

• 0019-steamcompmgr-arm64-virtual-white.patch - Armada, verbatim: the colour-temperature slider's (x, y) arrives as one 64-bit element from the ARM64 client; y is recovered from x.

• 0020-color-p3-red-is-wide-gamut.patch - Armada, verbatim.

• 0100-realtime-queue-and-gamepad-cursor.patch - this app, two of Armada's ported by hand onto 3.16.29: realtime-priority Vulkan queues on request (GAMESCOPE_FORCE_VULKAN_REALTIME=1) without CAP_SYS_NICE, which proot can never have (a no-op on KGSL Turnip, which has a single submit-queue priority); and the gamepad-driven cursor sprite following the X pointer that XTest moves (it sat frozen). The X pointer is asked for only while a cursor image is drawn - every vblank while shown, every 50 ms while hidden for inactivity - since each ask is a blocking round trip to Xwayland on the paint thread; with no image, wlserver's position is used as upstream does.

• 0110-wayland-backend-touch.patch - this app: the nested Wayland backend bound only the host's pointer and keyboard, so a finger on the phone's screen never reached Steam. It now binds wl_touch too and hands each finger to wlserver's touch path (wlserver_touchdown / motion / up) - the one a Steam Deck's touchscreen drives - so what a touch does follows the client's touch mode (Steam's Big Picture sets Passthrough: a real touch, rows scroll under a finger). Finger ids are offset by one, since the nested pointer already moves wlserver's touch 0.

• 0111-wayland-pointer-warps-in-passthrough.patch - this app: the nested pointer's motion goes to wlserver as touch 0, and in Passthrough (Big Picture's touch mode) a motion for a touch that is not down moves nothing - so in the app's touchpad mode the Steam client saw no hover and a click landed wherever the pointer had last been. The motion now always warps the real pointer as well (bAlwaysWarpCursor), which the other touch modes did already.

• 0112-restore-iconified-game-on-resume.patch - this app: the Steam menu is an overlay that takes input without changing the focus window, and a fullscreen wine game minimizes itself when it loses input. gamescope only takes a window out of iconic when the focus window changes, and wine will not activate a window it believes iconic, so after Resume the game stayed minimized: a black screen with its small caption in the top-left corner (Titanfall 2, GE-Proton 11). The iconify request is remembered and the window goes back to NormalState before input returns to it, then focus is handed over again. GAMESCOPE_RESTORE_FOCUS_WINDOW on the root window asks for the same restore from outside (the session script's resume watcher).

• 0113-steam-overlay-keeps-game-keyboard-focus.patch - this app: the Steam client opens the Quick Access Menu and Steam menu over a game with STEAM_INPUT_FOCUS 1, which moves X keyboard focus to its overlay; wine then deactivates the game and a fullscreen game minimizes itself, freezing behind the menu instead of running on as on a Steam Deck. Steam's own overlay taking input now keeps keyboard focus on the game, as mode 2 does; its input comes from the controller through Steam Input, not the X keyboard. The pointer warps gamescope makes as input moves to Steam and back are skipped around it, since the game - still taking input - saw them as a mouse jump.

Sixteen more of Armada's patches are DRM/lease/HDR-on-KMS work for a native display, which this app's Wayland-hosted gamescope never reaches, or need a newer gamescope than the runtime has.