/// Creates a Mirror Texture which is auto-refreshed to mirror Rift contents produced by this application.
///
/// A second call to ovr_CreateMirrorTextureGL for a given ovrSession before destroying the first one
/// is not supported and will result in an error return.
///
/// \param[in] session Specifies an ovrSession previously returned by ovr_Create.
/// \param[in] desc Specifies the requested mirror texture description.
/// \param[out] out_MirrorTexture Specifies 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 HMD with ovr_Destroy.
///
/// \return Returns an ovrResult indicating success or failure. In the case of failure, use
/// ovr_GetLastErrorInfo to get more information.
///
/// \note The \a format provided should be thought of as the format the distortion compositor will use when writing into the mirror
/// texture. It is highly recommended that mirror textures are requested as sRGB formats because the distortion compositor
/// does sRGB-correct rendering. If the application requests a non-sRGB format (e.g. R8G8B8A8_UNORM) as the mirror texture,
/// then the application might have to apply a manual linear-to-gamma conversion when reading from the mirror texture.
/// Failure to do so can result in incorrect gamma conversions leading to gamma-curve artifacts and color banding.
///
/// \see ovr_GetMirrorTextureBufferGL
/// \see ovr_DestroyMirrorTexture
func (s *Session) CreateMirrorTextureGL(desc *TextureSwapChainDesc) (MirrorTexture, error) {
var cDesc C.ovrMirrorTextureDesc
cDesc.Format = C.ovrTextureFormat(desc.Format)
cDesc.Width = C.int(desc.Width)
cDesc.Height = C.int(desc.Height)
cDesc.MiscFlags = C.uint(desc.MiscFlags)
var cMirrorTexture C.ovrMirrorTexture
result := C.ovr_CreateMirrorTextureGL(s.cSession, &cDesc, &cMirrorTexture)
err := errorForResult(result)
if err != nil {
return MirrorTexture{}, err
}
return MirrorTexture{cMirrorTexture: cMirrorTexture}, nil
}
/// Creates a TextureSwapChain suitable for use with OpenGL.
///
/// \param[in] session Specifies an ovrSession previously returned by ovr_Create.
/// \param[in] desc Specifies the requested texture properties. See notes for more info about texture format.
/// \param[out] out_TextureSwapChain Returns the created ovrTextureSwapChain, which will be valid upon
/// a successful return value, else it will be NULL. This texture swap chain must be eventually
/// destroyed via ovr_DestroyTextureSwapChain before destroying the HMD with ovr_Destroy.
///
/// \return Returns an ovrResult indicating success or failure. In the case of failure, use
/// ovr_GetLastErrorInfo to get more information.
///
/// \note The \a format provided should be thought of as the format the distortion compositor will use when reading
/// the contents of the texture. To that end, it is highly recommended that the application requests texture swap chain
/// formats that are in sRGB-space (e.g. OVR_FORMAT_R8G8B8A8_UNORM_SRGB) as the distortion compositor does sRGB-correct
/// rendering. Furthermore, the app should then make sure "glEnable(GL_FRAMEBUFFER_SRGB);" is called before rendering
/// into these textures. Even though it is not recommended, if the application would like to treat the texture as a linear
/// format and do linear-to-gamma conversion in GLSL, then the application can avoid calling "glEnable(GL_FRAMEBUFFER_SRGB);",
/// but should still pass in an sRGB variant for the \a format. Failure to do so will cause the distortion compositor
/// to apply incorrect gamma conversions leading to gamma-curve artifacts.
///
/// \see ovr_GetTextureSwapChainLength
/// \see ovr_GetTextureSwapChainCurrentIndex
/// \see ovr_GetTextureSwapChainDesc
/// \see ovr_GetTextureSwapChainBufferGL
/// \see ovr_DestroyTextureSwapChain
func (s *Session) CreateTextureSwapChainGL(desc *TextureSwapChainDesc) (TextureSwapChain, error) {
var cDesc C.ovrTextureSwapChainDesc
cDesc.Type = C.ovrTextureType(desc.Typ)
cDesc.Format = C.ovrTextureFormat(desc.Format)
cDesc.ArraySize = C.int(desc.ArraySize)
cDesc.Width = C.int(desc.Width)
cDesc.Height = C.int(desc.Height)
cDesc.MipLevels = C.int(desc.MipLevels)
cDesc.SampleCount = C.int(desc.SampleCount)
cDesc.StaticImage = ovrBool(desc.StaticImage)
cDesc.MiscFlags = C.uint(desc.MiscFlags)
cDesc.BindFlags = C.uint(desc.BindFlags)
var cSwapTextureChain C.ovrTextureSwapChain
result := C.ovr_CreateTextureSwapChainGL(s.cSession, &cDesc, &cSwapTextureChain)
err := errorForResult(result)
if err != nil {
return TextureSwapChain{}, err
}
return TextureSwapChain{cTextureSwapChain: cSwapTextureChain}, nil
}
