forked from unom/punktfunk
enricobuehlerandClaude Fable 5
f407f41855
The DCP "mismatched swapID's" kernel panic reproduced on a 240 Hz Mac Studio with stage-3 glass pacing active: a fully serialized, one-in-flight present stream still races WindowServer's own swap submissions. So the mitigation has to change the MECHANISM, not the rate — the CAMetalLayer image queue itself is the racing path in a composited (windowed) session. Windowed PyroWave now presents the way video players do: the planar CSC renders into a pooled IOSurface (4 × BGRA8, in-use-aware LRU reuse) and the render thread hands it to a plain CALayer's `contents` on main inside an ordinary CATransaction. WindowServer treats that as normal layer damage on its own composite cadence — no out-of-band image-queue swaps to race. Fullscreen keeps the CAMetalLayer path (direct scanout, no compositing, no panic reports); the hosting view pushes the window's composited state on every layout, and flipping modes just covers/uncovers the metal layer (no black flash). VT codecs keep the metal path everywhere: no panic reports there, and their HDR/EDR presentation has no surface-contents equivalent wired. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>