WindowDisplay

Windows 11 virtual displays with a movable viewer for each monitor. Built on Microsoft’s Indirect Display Driver model (IddCx).

Architecture

Component	Path	Role
Driver	src/driver/WindowDisplayDriver	UMDF IddCx driver — create/remove up to 8 virtual monitors, advertise modes, process swap chains, publish shared frames
Host	src/host/WindowDisplayHost	C++/D3D11 — software device, topology, viewers, input, named-pipe control
Controller	src/controller/WindowDisplay	.NET 8 WPF — home UI, create dialog, app picker, layouts, repair

Shared protocol: src/shared/WindowDisplayProtocol.h

Correct build order (product plan)

1. Prove real virtual monitor create/remove
2. Prove local frame viewing
3. Prove accurate input
4. Prove multi-display
5. Ship simple controller UI
6. Layouts + recovery
7. Signing + installer
8. Polish + release

First internal deliverable: host --prototype with Create Display / Open Viewer / Restart Display / Remove Display.

Prerequisites

• Windows 11
• Visual Studio 2022 Build Tools (C++), Windows SDK 10.0.26100
• Windows Driver Kit 10.0.26100 (headers/libs)
• .NET 8 SDK
• NuGet CLI (winget install Microsoft.NuGet)
• For loading unsigned drivers in development: test signing (tools/enable-testsigning.ps1) + reboot

Build

nuget restore .\packages.config -PackagesDirectory .\packages
.\tools\build.ps1 -Configuration Release

Outputs stage to artifacts\Release\.

Development install

# Elevated
.\tools\enable-testsigning.ps1   # once, then reboot
.\tools\build.ps1
.\tools\install-driver.ps1

Then run the engineering prototype:

.\artifacts\Release\WindowDisplayHost.exe --prototype

Or the full controller:

.\artifacts\Release\WindowDisplay.exe

Uninstall

.\tools\uninstall-driver.ps1

Version 1 scope (summary)

In: real virtual displays, create/remove, ≤8 monitors, auto extend/place, viewers (Fit/Fill/Actual), mouse/keyboard, app move, presets, orientation, names, layouts, reboot persistence, sleep/reset recovery, off-screen rescue, light/dark UI, diagnostics, clean uninstall.

Out: HDR, touch/pen, relative gaming mouse, per-display audio, remote/streaming, high refresh gaming, protected content, macOS/Linux.

Release gates

See docs/GATES.md and docs/DEVELOPMENT.md.

Driver signing for public builds is a formal milestone (Partner Center + EV certificate; WHQL via HLK).

License

Proprietary — all rights reserved. See LICENSE.

You may not copy, modify, redistribute, or reuse this software (or any part of it) in another product without a separate written license from Syenar. Public visibility of this repository does not grant any open-source rights.

Third-party notices (including Microsoft Windows Driver Samples / IddCx patterns under MIT) are listed in NOTICE.