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docs: clarify HDR is supported on the Windows host (Linux still blocked)

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HDR (10-bit BT.2020 PQ) works end-to-end with the Windows host — it captures
an HDR desktop (WGC FP16 / Desktop-Duplication FP16 for the secure desktop)
and encodes HEVC Main10 to HDR-capable clients (Windows, Android). Only the
Linux host is blocked upstream (no 10-bit compositor capture). Corrected the
roadmap (grid + shipped/blocked), Windows Host page, status, and CLAUDE.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Enrico Bühler
2026-06-20 22:13:09 +02:00
parent 30179ccbab
commit 750f3676bb
4 changed files with 21 additions and 11 deletions
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docs-site/content/docs/windows-host.md
+5 -4
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@@ -7,8 +7,9 @@ description: "Run the punktfunk streaming host on a Windows PC with an NVIDIA GP
**Status: implemented and shipping — NVIDIA-only, x64-only.** punktfunk is Linux-first, but it also
runs as a native **Windows host**: a signed installer registers a `LocalSystem` service that streams
your Windows desktop or games to any punktfunk or Moonlight client, at the client's exact resolution
via a virtual display. It's newer and less battle-tested than the Linux host, and it is built
specifically around NVIDIA hardware.
via a virtual display — including **HDR10** (10-bit BT.2020 PQ) when your Windows desktop is in HDR
mode. It's newer and less battle-tested than the Linux host, and it is built specifically around
NVIDIA hardware. (The Linux host is 8-bit only — HDR there is blocked upstream.)
> This page is about the Windows **host** (streaming *from* a Windows PC). To stream *to* a Windows
> PC, see the [Windows client](/docs/clients#windows-desktop-client).
@@ -48,9 +49,9 @@ pipeline orchestration are all shared with the Linux host. The Windows host is a
| Subsystem | Linux backend | Windows backend |
|---|---|---|
| **Capture** | xdg ScreenCast portal → PipeWire (dmabuf) | **DXGI Desktop Duplication** → D3D11 texture |
| **Capture** | xdg ScreenCast portal → PipeWire (dmabuf) | **Windows.Graphics.Capture** (+ Desktop Duplication for the secure desktop) → D3D11 texture; FP16/10-bit when the desktop is HDR |
| **Virtual display** | KWin / Mutter / Sway / gamescope | **SudoVDA** signed IDD — create a `WxH@Hz` monitor per session, capture it, tear it down |
| **Encode** | `ffmpeg-next` NVENC (CUDA hwframes) | **NVENC** with a D3D11 device (`--features nvenc`) |
| **Encode** | `ffmpeg-next` NVENC (CUDA hwframes) | **NVENC** with a D3D11 device (`--features nvenc`); HEVC Main10 / BT.2020 PQ for HDR |
| **Input — mouse/keyboard** | libei / wlr protocols | **SendInput** (Win32 VK + absolute mouse) |
| **Input — gamepads** | uinput Xbox 360 pad + rumble | **ViGEm** virtual pad + rumble back-channel |
| **Audio capture** | PipeWire sink-monitor | **WASAPI loopback** |