forked from unom/punktfunk
enricobuehlerandClaude Opus 5
028462ef6d
The per-monitor capture feature shipped with gamescope written off as "nested, therefore no physical heads of its own", and `monitors::list` returned a hard-coded empty Vec for it. That premise holds for a gamescope nested in another compositor and for the headless ones this crate spawns — but not for the deployment people actually stream from: a Bazzite/SteamOS Game Mode session is the DRM master and drives the TV directly. On such a box the console's picker was permanently empty, on exactly the hardware the feature was asked for. `gamescope/heads.rs` answers the narrow question instead — is this gamescope on the DRM backend, and which connector is it lighting? — from `/proc/<pid>/cmdline` (the backend flag and `--prefer-output`; gamescope publishes no protocol that reports its own output) and `/sys/class/drm` (what is plugged in, plus each connector's EDID for the picker label and the panel's preferred timing). The nested/headless shapes still answer an empty list, which is what they always meant. Mirroring needs no new capture code: gamescope composites its one head into a PipeWire node it already publishes, so the mirror arm is an ATTACH to that node — the gaming session is not stopped, relaunched or re-moded, which is the whole difference between "stream the panel I am looking at" and the MANAGED takeover that deliberately blanks it. Refresh comes from the EDID and never from `--nested-refresh`: that flag is the rate gamescope composites the nested game at, and reading it as the connector's rate would let a session launched at 60 cap a 120 Hz TV for the whole stream. Verified against home-bazzite-1's live EDID: manufacturer `1e6d` -> GSM, name descriptor -> "LG TV SSCR2", preferred timing 594 MHz / 4400x2250 -> 3840x2160@60. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>