Much of design/ described work that has since shipped. Trim each doc to
its durable rationale + still-open items (the code is the source of truth
for shipped detail; git history holds the full originals).
- Shipped plans -> status stubs: stats-capture, gamestream-host-plan,
apple-stage2-presenter, windows-service.
- Trimmed completed-out / open-kept: implementation-plan, hdr-pipeline,
host-latency, gpu-contention (fixed stale status table), game-library,
linux-setup (fixed m0->spike + stale zero-copy claim),
session-aware-host-followups, windows-client-bootstrap,
windows-dualsense-{scoping,game-detection}, windows-virtual-display,
security-review (per-finding status table; #12 still open),
apollo-comparison (shipped backlog collapsed to one-liners).
- Windows-host cluster consolidated: windows-host.md -> redirect into
windows-host-rewrite.md (whose stale scorecard is corrected -- goal1 is
merged, M4 done); windows-secure-desktop.md archived (now a fallback
behind IDD-push primary).
- Kept evergreen: ci.md, gamescope-multiuser.md, windows-build-and-packaging.md.
- New design/README.md: per-doc status table + consolidated open-items
roll-up so nothing is tracked in only one buried doc.
- Repoint 5 code comments to the archived secure-desktop doc path.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
NVIDIA/AMD Vulkan ICDs refuse to *advertise* an HDR color space for a surface on an
IddCx indirect/virtual display, so Vulkan games (Doom: The Dark Ages, id Tech, Indiana
Jones, …) report "device does not support HDR" — even though Windows HDR, DWM compose,
and the client PQ stream all work, and the ICD happily *accepts + presents* a forced HDR
swapchain there. The whole gap is enumeration; the community (Apollo/Sunshine/VDD) wrote
this off as kernel-side / unfixable.
Add VK_LAYER_PUNKTFUNK_hdr_inject (packaging/windows/pf-vkhdr-layer/): a standalone
cdylib Vulkan implicit layer that appends {A2B10G10R10, HDR10_ST2084} + {RGBA16F, scRGB}
to vkGetPhysicalDeviceSurfaceFormats[2]KHR (no need to hook vkCreateSwapchainKHR — the
ICD doesn't validate the color space there). Self-gated on the surface monitor's actual
advanced-color state (DisplayConfig GET_ADVANCED_COLOR_INFO), so it is a complete no-op
on SDR sessions and real monitors (dedup). Always-on (registry-discovered) so it works
regardless of how a game is launched — env-scoping silently fails for already-running
Steam. Escape hatches: DISABLE_PF_VKHDR, PF_VKHDR_EXCLUDE, and a built-in kernel-anti-
cheat denylist.
The installer builds/signs/stages it and registers it under
HKLM64\SOFTWARE\Khronos\Vulkan\ImplicitLayers (opt-out "Install the HDR Vulkan layer"
task); windows-host CI fmt+clippy-gates it (msvc-only FFI).
Live-validated on the RTX box: Doom: The Dark Ages enables HDR over the pf-vdisplay
virtual display.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler