Turn any monitor into a horizontally‑mirrored display you can actually work on — with a cursor that still moves the right way and clicks that land where you expect.
Most "screen flip" tools just capture your screen and redraw it backwards, which leaves you fighting a mirror‑image cursor. ScreenFlip solves the part everyone skips: it puts your real windows and the real pointer on a hidden workspace and shows that workspace flipped, full‑screen on your chosen monitor, drawing a matching cursor at the mirrored spot. Move the mouse and it behaves naturally; click and it hits exactly what you see.
Great for teleprompters / beam‑splitter glass, filming yourself at a screen the camera mirrors, and mirror / practice setups you still need to operate.
| Edition | Stack | Status | |
|---|---|---|---|
| 🍎 | macOS | Swift · ScreenCaptureKit · private CGVirtualDisplay |
Proven (built/tested on Apple Silicon, M3) |
| 🪟 | Windows | C++ · Direct3D 11 · Windows.Graphics.Capture · IddCx | Architected from the macOS app — see its caveats |
Both editions share the same "Model B" architecture: a headless virtual workspace hosts your windows and the real cursor; it is captured and re‑drawn horizontally flipped on the physical monitor; a passive proxy cursor is painted at the mirrored position; and there is no input interception anywhere — clicks, drags and typing are all native. Display arrangement is saved on launch and restored on quit.
The big platform difference is the virtual display:
- macOS uses the private, driver‑free
CGVirtualDisplay. - Windows has no driver‑free equivalent, so the full experience uses an IddCx
virtual‑display driver (an existing signed community one, or the bundled
windows/driver); without one it falls back to a degraded "mirror another display" mode. See the Windows notes andwindows/SPEC.md.
screenflip/
├── macos/ # macOS edition (Swift) — build.sh, Sources/, prebuilt build/
├── windows/ # Windows edition (C++) — build.bat, src/, driver/, SPEC.md
├── assets/ # shared marketing images
└── README.md # you are here
- macOS →
macos/README.md—cd macos && ./build.sh - Windows →
windows/README.md—cd windows && build.bat
Questions, bug reports, or ideas? Email vladimir@vbar.io.
Provided as‑is, for personal use. No warranty.