The Compositor Mirror tool displays the content that appears within the Rift headset on your computer monitor. It has several display options that are useful for development, troubleshooting, and presentations.
Anything that appears in the Rift headset can be shown in the Compositor Mirror tool, including Oculus Home, Guardian System boundaries, in-game notifications, and transition fades. It is compatible with all games and experiences regardless whether they are developed using the native PC SDK or a game engine.
The Compositor Mirror tool is located in C:\Program Files\Oculus\Support\oculus-diagnostics\OculusMirror.exe
The Compositor Mirror tool provides several display options.
The default mode is recommended for live presentations and demos. If you double-click OculusMirror from Windows Explorer or run from the command line without specifying any options, the tool displays a 1366x768 (pixel) window showing a rectilinear view of the right eye image, along with the Guardian System boundary layer and the Oculus notification layer.
The other display modes are as follows:OculusMirror.exe --LeftEyeOnly Display the left eye image in rectilinear view:
You can change the size of the window by dragging the window borders on the desktop. You can also use the --Size width height command to set the size of the window (in pixels) from the command line. If you exceed the resolution of your main display, the window size is reduced to fit. For example:
OculusMirror.exe --Size 2160 2160 --RightEyeOnly
You can display the Oculus notifications layer by using --IncludeNotifications. For example:
OculusMirror.exe --RectilinearBothEyes --IncludeNotifications
It is possible that the CompositorMirror tool may drop frames that are displayed within the Rift headset. If you wish to clearly see when this happens, use the --FlashFrameDrops command. This will cause the display in the CompositorMirror to flash whenever a frame is dropped. For example:
OculusMirror.exe --FlashFrameDrops --RectilinearBothEyes