forked from unom/punktfunk
enricobuehlerandClaude Opus 5
6a4ffcb15c
The gamepad/console UI looked right on launch, and wrong forever after the first HDR session: connect to an HDR host, disconnect, and the UI came back overblown with wrong colours. The UI is not its own renderer. It is a `pf_presenter::overlay::Overlay` composited into the SAME swapchain the stream used, and it draws plain sRGB with no HDR awareness at all — so the swapchain's colorspace decides how its pixels are read. `present` switches SDR↔HDR10 from the FRAME's colour signalling, and a UI-only present is `FrameInput::Redraw`, which carries none: the mode block is skipped entirely and nothing ever hands HDR10 back. The UI's sRGB mid-tones were then emitted as PQ code points, i.e. near-peak nits. `leave_hdr` drops back to SDR, called where the UI-only present already happens and gated on the existing `browse_idle` — Browse mode with no live connector, i.e. the UI owns the screen. That covers every route back to the UI rather than just the Ended/Failed arms, and it is guarded internally so idle iterations stay free. It also bails when minimized, which is load-bearing rather than an optimization: `recreate_swapchain` keeps the old swapchain at a zero extent, but `set_hdr_mode` would by then have rebuilt the CSC and overlay pipes against the SDR format — mismatched against live HDR10 images. `present` early-returns on a zero extent above its HDR block, so this was unreachable until a caller outside `present` existed. Deliberately not applied to the `resize_scrim` arm of the same present: that scrim is a mid-stream gap in a session that is still HDR, and flipping there would rebuild the swapchain twice per resize. Does not address the adjacent case: an overlay drawn DURING a live HDR session (the stats HUD, the resize scrim) is blown out the same way. That needs the overlay to PQ-encode when `hdr_active`; dropping to SDR is only correct here because the console UI shows exactly when no stream is live. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>