DesktopSplitter

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The DesktopSplitter window, showing a 5120×1440 240 Hz monitor and layout options including side by side, columns and a 16:9 centre split.

Cover The DesktopSplitter window, showing a 5120×1440 240 Hz monitor and layout options including side by side, columns and a 16:9 centre split.

DesktopSplitter

Blueprint Class /Game/Projects/Software/BP_DesktopSplitter

Viewport 1 item

Software

Role

Solo developer

When

2026

Status

In development

Platforms

[0] Windows

Links

Source on GitHub

Description

Split one physical monitor into 2–4 virtual monitors that Windows treats as real displays.

DesktopSplitter lets Windows treat parts of one monitor as separate displays — useful for window snapping, full-screen apps, or streaming one region of an ultrawide.

It works at driver level. An Indirect Display (IddCx) driver creates virtual monitors, so Windows, games and capture software all see them as real displays. A Direct3D compositor then draws those virtual monitors back onto the physical monitor at a high refresh rate.

It’s still in development — the installer isn’t published yet.

Under the hood 5 Array elements

Index [ 0 ]

IddCx (UMDF) virtual display driver — no test-signing required

Index [ 1 ]

Each virtual monitor carries its own EDID serial, so segments never swap places

Index [ 2 ]

Direct3D / DXGI compositor that draws the virtual monitors onto the real one, measured at 240 Hz

Index [ 3 ]

A "16:9 Center" layout for gaming on ultrawides

Index [ 4 ]

Experimental: hide the physical monitor from Windows, with a 10-second keep/revert safety countdown

Tech Stack

C++
IddCx / UMDF
Direct3D 11
DXGI
C#
WPF

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