Function ovr_sys::directx::ovr_CreateMirrorTextureDX

pub unsafe extern "C" fn ovr_CreateMirrorTextureDX(
    session: ovrSession, 
    d3dPtr: *mut IUnknown, 
    desc: *const ovrMirrorTextureDesc, 
    out_MirrorTexture: *mut ovrMirrorTexture
) -> ovrResult

Create Mirror Texture which is auto-refreshed to mirror Rift contents produced by this application.

A second call to ovr_CreateMirrorTextureDX for a given ovrSession before destroying the first one is not supported and will result in an error return.

in session Specifies an ovrSession previously returned by ovr_Create.

in d3dPtr Specifies the application's D3D11Device to create resources with or the D3D12CommandQueue which must be the same one the application renders to the textures with.

in desc Specifies requested texture properties. See notes for more info about texture format.

out out_MirrorTexture Returns the created ovrMirrorTexture, which will be valid upon a successful return value, else it will be NULL. This texture must be eventually destroyed via ovr_DestroyMirrorTexture before destroying the session with ovr_Destroy.

Returns an ovrResult indicating success or failure. In the case of failure, use ovr_GetLastErrorInfo to get more information.

Note: The texture format provided in the desc should be thought of as the format the compositor will use for the RenderTargetView when writing into mirror texture. To that end, it is highly recommended that the application requests a mirror texture format that is in sRGB-space (e.g. OVR_FORMAT_R8G8B8A8_UNORM_SRGB) as the compositor does sRGB-correct rendering. If however the application wants to still read the mirror texture as a linear format (e.g. OVR_FORMAT_R8G8B8A8_UNORM) and handle the sRGB-to-linear conversion in HLSL code, then it is recommended the application still requests an sRGB format and also use the ovrTextureMisc_DX_Typeless flag in the ovrMirrorTextureDesc's Flags field. This will allow the application to bind a ShaderResourceView that is a linear format while the compositor continues to treat is as sRGB. Failure to do so will cause the compositor to apply unexpected gamma conversions leading to gamma-curve artifacts.

Example code, not translated from C

ovrMirrorTexture     mirrorTexture = nullptr;
ovrMirrorTextureDesc mirrorDesc = {};
mirrorDesc.Format = OVR_FORMAT_R8G8B8A8_UNORM_SRGB;
mirrorDesc.Width  = mirrorWindowWidth;
mirrorDesc.Height = mirrorWindowHeight;
ovrResult result = ovr_CreateMirrorTextureDX(session, d3d11Device, &mirrorDesc, &mirrorTexture);
[...]
// Destroy the texture when done with it.
ovr_DestroyMirrorTexture(session, mirrorTexture);
mirrorTexture = nullptr;

see ovr_GetMirrorTextureBufferDX, ovr_DestroyMirrorTexture