OptiX 8.0.0 compatibility

[Thomaswang0822]

No description provided.

[Thomaswang0822]

OptiX™ 8.0.0 is released in Aug 2023, and it's better for Falcor to support latest and future OptiX.

[Thomaswang0822]

Here are related lines in optix_types.h of OptiX 8.0.0 SDK

Line 1637

/// Alpha denoising mode
///
/// \see #optixDenoiserCreate()
typedef enum OptixDenoiserAlphaMode
{
    /// Copy alpha (if present) from input layer, no denoising.
    OPTIX_DENOISER_ALPHA_MODE_COPY = 0,

    /// Denoise alpha.
    OPTIX_DENOISER_ALPHA_MODE_DENOISE = 1
} OptixDenoiserAlphaMode;

Line 1646

/// Options used by the denoiser
///
/// \see #optixDenoiserCreate()
typedef struct OptixDenoiserOptions
{
    // if nonzero, albedo image must be given in OptixDenoiserGuideLayer
    unsigned int guideAlbedo;

    // if nonzero, normal image must be given in OptixDenoiserGuideLayer
    unsigned int guideNormal;

    /// alpha denoise mode
    OptixDenoiserAlphaMode denoiseAlpha;
} OptixDenoiserOptions;

Line 1728

/// Various parameters used by the denoiser
///
/// \see #optixDenoiserInvoke()
/// \see #optixDenoiserComputeIntensity()
/// \see #optixDenoiserComputeAverageColor()

typedef struct OptixDenoiserParams
{
    /// average log intensity of input image (default null pointer). points to a single float.
    /// if set to null, autoexposure will be calculated automatically for the input image.
    /// Should be set to average log intensity of the entire image at least if tiling is used to
    /// get consistent autoexposure for all tiles.
    CUdeviceptr  hdrIntensity;

    /// blend factor.
    /// If set to 0 the output is 100% of the denoised input. If set to 1, the output is 100% of
    /// the unmodified input. Values between 0 and 1 will linearly interpolate between the denoised
    /// and unmodified input.
    float        blendFactor;

    /// this parameter is used when the OPTIX_DENOISER_MODEL_KIND_AOV model kind is set.
    /// average log color of input image, separate for RGB channels (default null pointer).
    /// points to three floats.
    /// if set to null, average log color will be calculated automatically. See hdrIntensity for tiling,
    /// this also applies here.
    CUdeviceptr  hdrAverageColor;

    /// In temporal modes this parameter must be set to 1 if previous layers (e.g.
    /// previousOutputInternalGuideLayer) contain valid data. This is the case in the
    /// second and subsequent frames of a sequence (for example after a change of camera
    /// angle). In the first frame of such a sequence this parameter must be set to 0.
    unsigned int temporalModeUsePreviousLayers;
} OptixDenoiserParams;