TextureHandle DenoiseDirectionalScreenSpaceShadow(RenderGraph renderGraph, HDCamera hdCamera,
TextureHandle depthBuffer, TextureHandle normalBuffer, TextureHandle motionVetorsBuffer,
TextureHandle noisyBuffer, TextureHandle velocityBuffer, TextureHandle distanceBuffer)
{
// Is the history still valid?
int dirShadowIndex = m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex & (int)LightDefinitions.s_ScreenSpaceShadowIndexMask;
float historyValidity = EvaluateHistoryValidityDirectionalShadow(hdCamera, dirShadowIndex, m_CurrentSunLightAdditionalLightData);
// Grab the history buffers for shadows
RTHandle shadowHistoryArray = RequestShadowHistoryBuffer(hdCamera);
RTHandle shadowHistoryDistanceArray = RequestShadowHistoryDistanceBuffer(hdCamera);
RTHandle shadowHistoryValidityArray = RequestShadowHistoryValidityBuffer(hdCamera);
// Evaluate the slot of the directional light (given that it may be a color shadow, we need to use the mask to get the actual slot indices)
GetShadowChannelMask(dirShadowIndex, m_CurrentSunLightAdditionalLightData.colorShadow ? ScreenSpaceShadowType.Color : ScreenSpaceShadowType.GrayScale, ref m_ShadowChannelMask0);
GetShadowChannelMask(dirShadowIndex, ScreenSpaceShadowType.GrayScale, ref m_ShadowChannelMask1);
// Apply the temporal denoiser
HDTemporalFilter temporalFilter = GetTemporalFilter();
HDTemporalFilter.TemporalDenoiserArrayOutputData temporalFilterResult = temporalFilter.DenoiseBuffer(renderGraph, hdCamera,
depthBuffer, normalBuffer, motionVetorsBuffer,
noisyBuffer, shadowHistoryArray,
distanceBuffer, shadowHistoryDistanceArray,
velocityBuffer,
shadowHistoryValidityArray,
dirShadowIndex / 4, m_ShadowChannelMask0, m_ShadowChannelMask1,
true, !m_CurrentSunLightAdditionalLightData.colorShadow, historyValidity);
// Apply the spatial denoiser
HDDiffuseShadowDenoiser shadowDenoiser = GetDiffuseShadowDenoiser();
TextureHandle denoisedBuffer = shadowDenoiser.DenoiseBufferDirectional(renderGraph, hdCamera,
depthBuffer, normalBuffer,
temporalFilterResult.outputSignal, temporalFilterResult.outputSignalDistance,
m_CurrentSunLightAdditionalLightData.filterSizeTraced, m_CurrentSunLightAdditionalLightData.angularDiameter * 0.5f, !m_CurrentSunLightAdditionalLightData.colorShadow);
// Now that we have overriden this history, mark is as used by this light
hdCamera.PropagateShadowHistory(m_CurrentSunLightAdditionalLightData, dirShadowIndex, GPULightType.Directional);
return(denoisedBuffer);
}
void DenoiseDirectionalScreenSpaceShadow(CommandBuffer cmd, HDCamera hdCamera, RTHandle velocityBuffer, RTHandle distanceBuffer, RTHandle inoutBuffer)
{
RTHandle intermediateBuffer = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA1);
RTHandle intermediateDistanceBuffer = GetRayTracingBuffer(InternalRayTracingBuffers.RG0);
// Is the history still valid?
int dirShadowIndex = m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex & (int)LightDefinitions.s_ScreenSpaceShadowIndexMask;
float historyValidity = EvaluateHistoryValidityDirectionalShadow(hdCamera, dirShadowIndex, m_CurrentSunLightAdditionalLightData);
// Grab the history buffers for shadows
RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadowHistory)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadowHistory, ShadowHistoryBufferAllocatorFunction, 1);
RTHandle shadowHistoryValidityArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadowHistoryValidity)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadowHistoryValidity, ShadowHistoryValidityBufferAllocatorFunction, 1);
RTHandle shadowHistoryDistanceArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadowDistanceValidity)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadowDistanceValidity, ShadowHistoryDistanceBufferAllocatorFunction, 1);
// Grab the slot of the directional light (given that it may be a color shadow, we need to use the mask to get the actual slot index)
GetShadowChannelMask(dirShadowIndex, m_CurrentSunLightAdditionalLightData.colorShadow ? ScreenSpaceShadowType.Color : ScreenSpaceShadowType.GrayScale, ref m_ShadowChannelMask0);
GetShadowChannelMask(dirShadowIndex, ScreenSpaceShadowType.GrayScale, ref m_ShadowChannelMask1);
// Apply the temporal denoiser
HDTemporalFilter temporalFilter = GetTemporalFilter();
temporalFilter.DenoiseBuffer(cmd, hdCamera, inoutBuffer, shadowHistoryArray,
shadowHistoryValidityArray,
velocityBuffer,
intermediateBuffer,
dirShadowIndex / 4, m_ShadowChannelMask0,
distanceBuffer, shadowHistoryDistanceArray, intermediateDistanceBuffer, m_ShadowChannelMask1,
singleChannel: !m_CurrentSunLightAdditionalLightData.colorShadow, historyValidity: historyValidity);
// Apply the spatial denoiser
HDDiffuseShadowDenoiser shadowDenoiser = GetDiffuseShadowDenoiser();
shadowDenoiser.DenoiseBufferDirectional(cmd, hdCamera, intermediateBuffer, intermediateDistanceBuffer, inoutBuffer, m_CurrentSunLightAdditionalLightData.filterSizeTraced, m_CurrentSunLightAdditionalLightData.angularDiameter * 0.5f, singleChannel: !m_CurrentSunLightAdditionalLightData.colorShadow);
// Now that we have overriden this history, mark is as used by this light
hdCamera.PropagateShadowHistory(m_CurrentSunLightAdditionalLightData, dirShadowIndex, GPULightType.Directional);
}