HDShadowData CreateShadowData(HDShadowRequest shadowRequest, HDShadowAtlas atlas)
{
HDShadowData data = new HDShadowData();
var devProj = shadowRequest.deviceProjection;
var view = shadowRequest.view;
data.proj = new Vector4(devProj.m00, devProj.m11, devProj.m22, devProj.m23);
data.pos = shadowRequest.position;
data.rot0 = new Vector3(view.m00, view.m01, view.m02);
data.rot1 = new Vector3(view.m10, view.m11, view.m12);
data.rot2 = new Vector3(view.m20, view.m21, view.m22);
data.shadowToWorld = shadowRequest.shadowToWorld;
data.cacheTranslationDelta = new Vector3(0.0f, 0.0f, 0.0f);
// Compute the scale and offset (between 0 and 1) for the atlas coordinates
float rWidth = 1.0f / atlas.width;
float rHeight = 1.0f / atlas.height;
data.atlasOffset = Vector2.Scale(new Vector2(rWidth, rHeight), new Vector2(shadowRequest.atlasViewport.x, shadowRequest.atlasViewport.y));
data.shadowMapSize = new Vector4(shadowRequest.atlasViewport.width, shadowRequest.atlasViewport.height, 1.0f / shadowRequest.atlasViewport.width, 1.0f / shadowRequest.atlasViewport.height);
data.normalBias = shadowRequest.normalBias;
data.worldTexelSize = shadowRequest.worldTexelSize;
data.shadowFilterParams0.x = shadowRequest.shadowSoftness;
data.shadowFilterParams0.y = HDShadowUtils.Asfloat(shadowRequest.blockerSampleCount);
data.shadowFilterParams0.z = HDShadowUtils.Asfloat(shadowRequest.filterSampleCount);
data.shadowFilterParams0.w = shadowRequest.minFilterSize;
data.zBufferParam = shadowRequest.zBufferParam;
if (atlas.HasBlurredEVSM())
{
data.shadowFilterParams0 = shadowRequest.evsmParams;
}
return(data);
}
void BuildLightCluster(HDCamera hdCamera, CommandBuffer cmd)
{
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingBuildCluster)))
{
// Grab the kernel
ComputeShader lightClusterCS = m_RenderPipelineRayTracingResources.lightClusterBuildCS;
int lightClusterKernel = lightClusterCS.FindKernel(m_LightClusterKernelName);
// Inject all the parameters
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, HDShaderIDs._RaytracingLightClusterRW, m_LightCluster);
cmd.SetComputeVectorParam(lightClusterCS, _ClusterCellSize, clusterCellSize);
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _LightVolumes, m_LightVolumeGPUArray);
cmd.SetComputeFloatParam(lightClusterCS, _LightVolumeCount, HDShadowUtils.Asfloat(totalLightCount));
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _RaytracingLightCullResult, m_LightCullResult);
// Dispatch a compute
int numGroupsX = 8;
int numGroupsY = 8;
int numGroupsZ = 4;
cmd.DispatchCompute(lightClusterCS, lightClusterKernel, numGroupsX, numGroupsY, numGroupsZ);
}
}
void BuildLightCluster(HDCamera hdCamera, CommandBuffer cmd)
{
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingBuildCluster)))
{
var lightClusterSettings = hdCamera.volumeStack.GetComponent <LightCluster>();
numLightsPerCell = lightClusterSettings.maxNumLightsPercell.value;
// Make sure the Cluster buffer has the right size
int bufferSize = 64 * 64 * 32 * (numLightsPerCell + 4);
if (m_LightCluster.count != bufferSize)
{
ResizeClusterBuffer(bufferSize);
}
// Grab the kernel
ComputeShader lightClusterCS = m_RenderPipelineRayTracingResources.lightClusterBuildCS;
int lightClusterKernel = lightClusterCS.FindKernel(m_LightClusterKernelName);
// Inject all the parameters
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, HDShaderIDs._RaytracingLightCluster, m_LightCluster);
cmd.SetComputeVectorParam(lightClusterCS, HDShaderIDs._MinClusterPos, minClusterPos);
cmd.SetComputeVectorParam(lightClusterCS, HDShaderIDs._MaxClusterPos, maxClusterPos);
cmd.SetComputeVectorParam(lightClusterCS, _ClusterCellSize, clusterCellSize);
cmd.SetComputeFloatParam(lightClusterCS, HDShaderIDs._LightPerCellCount, HDShadowUtils.Asfloat(numLightsPerCell));
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _LightVolumes, m_LightVolumeGPUArray);
cmd.SetComputeFloatParam(lightClusterCS, _LightVolumeCount, HDShadowUtils.Asfloat(totalLightCount));
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _RaytracingLightCullResult, m_LightCullResult);
// Dispatch a compute
int numGroupsX = 8;
int numGroupsY = 8;
int numGroupsZ = 4;
cmd.DispatchCompute(lightClusterCS, lightClusterKernel, numGroupsX, numGroupsY, numGroupsZ);
}
}
SSGIUpscaleParameters PrepareSSGIUpscaleParameters(HDCamera hdCamera, GlobalIllumination settings)
{
SSGIUpscaleParameters parameters = new SSGIUpscaleParameters();
// Set the camera parameters
parameters.texWidth = hdCamera.actualWidth;
parameters.texHeight = hdCamera.actualHeight;
parameters.viewCount = hdCamera.viewCount;
parameters.halfScreenSize.Set(parameters.texWidth / 2, parameters.texHeight / 2, 1.0f / (parameters.texWidth * 0.5f), 1.0f / (parameters.texHeight * 0.5f));
// Set the generation parameters
var info = m_SharedRTManager.GetDepthBufferMipChainInfo();
parameters.firstMipOffset.Set(HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].x), HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].y));
// Grab the right kernel
parameters.bilateralUpsampleCS = m_Asset.renderPipelineResources.shaders.bilateralUpsampleCS;
parameters.upscaleKernel = m_BilateralUpSampleColorKernel;
return(parameters);
}
SSGIDenoiserParameters PrepareSSGIDenoiserParameters(HDCamera hdCamera, bool halfResolution, float historyValidity, bool historyNeedsClear, HDUtils.PackedMipChainInfo depthMipInfo)
{
var giSettings = hdCamera.volumeStack.GetComponent <UnityEngine.Rendering.HighDefinition.GlobalIllumination>();
SSGIDenoiserParameters parameters = new SSGIDenoiserParameters();
// Compute the dispatch parameters based on if we are half res or not
int tileSize = 8;
EvaluateDispatchParameters(hdCamera, halfResolution, tileSize, out parameters.numTilesX, out parameters.numTilesY, out parameters.halfScreenSize);
parameters.firstMipOffset.Set(HDShadowUtils.Asfloat((uint)depthMipInfo.mipLevelOffsets[1].x), HDShadowUtils.Asfloat((uint)depthMipInfo.mipLevelOffsets[1].y));
parameters.historyValidity = historyValidity;
parameters.viewCount = hdCamera.viewCount;
// Denoising parameters
parameters.filterRadius = giSettings.filterRadius;
parameters.halfResolution = halfResolution;
parameters.historyValidity = historyValidity;
parameters.historyNeedsClear = historyNeedsClear;
// Compute shader
parameters.ssgiDenoiserCS = m_SSGIDenoiserCS;
// Kernels
parameters.spatialFilterKernel = halfResolution ? m_SpatialFilterHalfKernel : m_SpatialFilterKernel;
parameters.temporalFilterKernel = halfResolution ? m_TemporalFilterHalfKernel : m_TemporalFilterKernel;
parameters.copyHistory = m_CopyHistory;
return(parameters);
}
void BuildLightCluster(CommandBuffer cmd, ComputeShader lightClusterCS, HDRaytracingEnvironment currentEnv)
{
using (new ProfilingSample(cmd, "Build Light Cluster", CustomSamplerId.RaytracingBuildCluster.GetSampler()))
{
var lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
numLightsPerCell = lightClusterSettings.maxNumLightsPercell.value;
// Make sure the Cluster buffer has the right size
int bufferSize = 64 * 64 * 32 * (numLightsPerCell + 4);
if (m_LightCluster.count != bufferSize)
{
ResizeClusterBuffer(bufferSize);
}
// Grab the kernel
int lightClusterKernel = lightClusterCS.FindKernel(m_LightClusterKernelName);
// Inject all the parameters
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, HDShaderIDs._RaytracingLightCluster, m_LightCluster);
cmd.SetComputeVectorParam(lightClusterCS, HDShaderIDs._MinClusterPos, minClusterPos);
cmd.SetComputeVectorParam(lightClusterCS, HDShaderIDs._MaxClusterPos, maxClusterPos);
cmd.SetComputeVectorParam(lightClusterCS, _ClusterCellSize, clusterCellSize);
cmd.SetComputeFloatParam(lightClusterCS, HDShaderIDs._LightPerCellCount, HDShadowUtils.Asfloat(numLightsPerCell));
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _LightVolumes, m_LightVolumeGPUArray);
cmd.SetComputeFloatParam(lightClusterCS, _LightVolumeCount, HDShadowUtils.Asfloat(totalLightCount));
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _RaytracingLightCullResult, m_LightCullResult);
// Dispatch a compute
int numGroupsX = 8;
int numGroupsY = 8;
int numGroupsZ = 4;
cmd.DispatchCompute(lightClusterCS, lightClusterKernel, numGroupsX, numGroupsY, numGroupsZ);
}
}
TextureHandle UpscaleSSGI(RenderGraph renderGraph, HDCamera hdCamera, GlobalIllumination giSettings, HDUtils.PackedMipChainInfo info, TextureHandle depthPyramid, TextureHandle inputBuffer)
{
using (var builder = renderGraph.AddRenderPass <UpscaleSSGIPassData>("Upscale SSGI", out var passData, ProfilingSampler.Get(HDProfileId.SSGIUpscale)))
{
builder.EnableAsyncCompute(false);
// Set the camera parameters
passData.texWidth = hdCamera.actualWidth;
passData.texHeight = hdCamera.actualHeight;
passData.viewCount = hdCamera.viewCount;
passData.halfScreenSize.Set(passData.texWidth / 2, passData.texHeight / 2, 1.0f / (passData.texWidth * 0.5f), 1.0f / (passData.texHeight * 0.5f));
// Set the generation parameters
passData.firstMipOffset.Set(HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].x), HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].y));
// Grab the right kernel
passData.bilateralUpsampleCS = m_Asset.renderPipelineResources.shaders.bilateralUpsampleCS;
passData.upscaleKernel = m_BilateralUpSampleColorKernel;
passData.depthTexture = builder.ReadTexture(depthPyramid);
passData.inputBuffer = builder.ReadTexture(inputBuffer);
passData.outputBuffer = builder.WriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "SSGI Final"
}));
builder.SetRenderFunc(
(UpscaleSSGIPassData data, RenderGraphContext ctx) =>
{
// Re-evaluate the dispatch parameters (we are evaluating the upsample in full resolution)
int ssgiTileSize = 8;
int numTilesXHR = (data.texWidth + (ssgiTileSize - 1)) / ssgiTileSize;
int numTilesYHR = (data.texHeight + (ssgiTileSize - 1)) / ssgiTileSize;
// Inject the input scalars
ctx.cmd.SetComputeVectorParam(data.bilateralUpsampleCS, HDShaderIDs._HalfScreenSize, data.halfScreenSize);
ctx.cmd.SetComputeVectorParam(data.bilateralUpsampleCS, HDShaderIDs._DepthPyramidFirstMipLevelOffset, data.firstMipOffset);
// Inject all the input buffers
ctx.cmd.SetComputeTextureParam(data.bilateralUpsampleCS, data.upscaleKernel, HDShaderIDs._DepthTexture, data.depthTexture);
ctx.cmd.SetComputeTextureParam(data.bilateralUpsampleCS, data.upscaleKernel, HDShaderIDs._LowResolutionTexture, data.inputBuffer);
// Inject the output textures
ctx.cmd.SetComputeTextureParam(data.bilateralUpsampleCS, data.upscaleKernel, HDShaderIDs._OutputUpscaledTexture, data.outputBuffer);
// Upscale the buffer to full resolution
ctx.cmd.DispatchCompute(data.bilateralUpsampleCS, data.upscaleKernel, numTilesXHR, numTilesYHR, data.viewCount);
});
return(passData.outputBuffer);
}
}
public SSGIDenoiserOutput Denoise(RenderGraph renderGraph, HDCamera hdCamera,
TextureHandle depthPyramid, TextureHandle normalBuffer, TextureHandle motionVectorsBuffer, TextureHandle inputBuffer0, TextureHandle inputBuffer1,
HDUtils.PackedMipChainInfo depthMipInfo, bool halfResolution = false, float historyValidity = 1.0f)
{
using (var builder = renderGraph.AddRenderPass <DenoiseSSGIPassData>("Denoise SSGI", out var passData, ProfilingSampler.Get(HDProfileId.SSGIDenoise)))
{
builder.EnableAsyncCompute(false);
// Prepass buffers
passData.depthTexture = builder.ReadTexture(depthPyramid);
passData.normalBuffer = builder.ReadTexture(normalBuffer);
passData.motionVectorsBuffer = builder.ReadTexture(motionVectorsBuffer);
// History buffers
bool historyRequireClear = false;
RTHandle indirectDiffuseHistory0 = RequestIndirectDiffuseHistory0(hdCamera, out historyRequireClear);
passData.indirectDiffuseHistory0 = builder.ReadWriteTexture(renderGraph.ImportTexture(indirectDiffuseHistory0));
RTHandle indirectDiffuseHistory1 = RequestIndirectDiffuseHistory1(hdCamera, out historyRequireClear);
passData.indirectDiffuseHistory1 = builder.ReadWriteTexture(renderGraph.ImportTexture(indirectDiffuseHistory1));
var historyDepthBuffer = halfResolution ? hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.Depth1) : hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.Depth);
passData.historyDepthBuffer = historyDepthBuffer != null?builder.ReadTexture(renderGraph.ImportTexture(historyDepthBuffer)) : renderGraph.defaultResources.blackTextureXR;
// Input buffers
passData.inputBuffer0 = builder.ReadTexture(inputBuffer0);
passData.inputBuffer1 = builder.ReadTexture(inputBuffer1);
// Output buffers
passData.outputBuffer0 = builder.WriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.B10G11R11_UFloatPack32, enableRandomWrite = true, name = "SSGI Denoised 0"
}));
passData.outputBuffer1 = builder.WriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16_SFloat, enableRandomWrite = true, name = "SSGI Denoised 1"
}));
// Parameters
var giSettings = hdCamera.volumeStack.GetComponent <UnityEngine.Rendering.HighDefinition.GlobalIllumination>();
// Compute the dispatch parameters based on if we are half res or not
int tileSize = 8;
EvaluateDispatchParameters(hdCamera, halfResolution, tileSize, out passData.numTilesX, out passData.numTilesY, out passData.halfScreenSize);
passData.firstMipOffset.Set(HDShadowUtils.Asfloat((uint)depthMipInfo.mipLevelOffsets[1].x), HDShadowUtils.Asfloat((uint)depthMipInfo.mipLevelOffsets[1].y));
passData.historyValidity = historyValidity;
passData.viewCount = hdCamera.viewCount;
passData.pixelSpreadTangent = HDRenderPipeline.GetPixelSpreadTangent(hdCamera.camera.fieldOfView, hdCamera.actualWidth, hdCamera.actualHeight);
// Denoising parameters
passData.filterRadius = giSettings.filterRadius;
passData.halfResolution = halfResolution;
passData.historyValidity = historyValidity;
passData.historyNeedsClear = historyRequireClear;
passData.exclusiveMode = !hdCamera.frameSettings.IsEnabled(FrameSettingsField.ProbeVolume);
// Compute shader
passData.ssgiDenoiserCS = m_SSGIDenoiserCS;
// Kernels
passData.spatialFilterKernel = halfResolution ? m_SpatialFilterHalfKernel : m_SpatialFilterKernel;
passData.temporalFilterKernel = halfResolution ? m_TemporalFilterHalfKernel : m_TemporalFilterKernel;
passData.copyHistory = m_CopyHistory;
builder.SetRenderFunc(
(DenoiseSSGIPassData data, RenderGraphContext ctx) =>
{
int effectiveRadius = data.exclusiveMode ? data.filterRadius / 2 : data.filterRadius;
if (data.exclusiveMode)
{
// Horizontal Filter
SpatialFilter(ctx.cmd, data, effectiveRadius, new Vector2(1.0f, 0.0f), data.inputBuffer0, data.inputBuffer1, data.outputBuffer0, data.outputBuffer1);
// Vertical Filter
SpatialFilter(ctx.cmd, data, effectiveRadius, new Vector2(0.0f, 1.0f), data.outputBuffer0, data.outputBuffer1, data.inputBuffer0, data.inputBuffer1);
}
// Grab the history buffer
if (data.historyNeedsClear)
{
// clear it to black if this is the first pass to avoid nans
CoreUtils.SetRenderTarget(ctx.cmd, data.indirectDiffuseHistory0, ClearFlag.Color, Color.black);
CoreUtils.SetRenderTarget(ctx.cmd, data.indirectDiffuseHistory1, ClearFlag.Color, Color.black);
}
// Bind the input buffers
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._DepthTexture, data.depthTexture);
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._NormalBufferTexture, data.normalBuffer);
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._CameraMotionVectorsTexture, data.motionVectorsBuffer);
ctx.cmd.SetComputeFloatParam(data.ssgiDenoiserCS, HDShaderIDs._HistoryValidity, data.historyValidity);
if (data.halfResolution)
{
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._HistoryDepthTexture, data.historyDepthBuffer);
ctx.cmd.SetComputeVectorParam(data.ssgiDenoiserCS, HDShaderIDs._DepthPyramidFirstMipLevelOffset, data.firstMipOffset);
}
else
{
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._HistoryDepthTexture, data.historyDepthBuffer);
}
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._HistoryBuffer0, data.indirectDiffuseHistory0);
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._HistoryBuffer1, data.indirectDiffuseHistory1);
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._InputNoisyBuffer0, data.inputBuffer0);
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._InputNoisyBuffer1, data.inputBuffer1);
// Bind the output buffer
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._OutputFilteredBuffer0, data.outputBuffer0);
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.temporalFilterKernel, HDShaderIDs._OutputFilteredBuffer1, data.outputBuffer1);
// Do the temporal pass
ctx.cmd.DispatchCompute(data.ssgiDenoiserCS, data.temporalFilterKernel, data.numTilesX, data.numTilesY, data.viewCount);
// Copy the new version into the history buffer
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.copyHistory, HDShaderIDs._InputNoisyBuffer0, data.outputBuffer0);
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.copyHistory, HDShaderIDs._InputNoisyBuffer1, data.outputBuffer1);
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.copyHistory, HDShaderIDs._OutputFilteredBuffer0, data.indirectDiffuseHistory0);
ctx.cmd.SetComputeTextureParam(data.ssgiDenoiserCS, data.copyHistory, HDShaderIDs._OutputFilteredBuffer1, data.indirectDiffuseHistory1);
ctx.cmd.DispatchCompute(data.ssgiDenoiserCS, data.copyHistory, data.numTilesX, data.numTilesY, data.viewCount);
// Horizontal Filter
SpatialFilter(ctx.cmd, data, effectiveRadius, new Vector2(1.0f, 0.0f), data.outputBuffer0, data.outputBuffer1, data.inputBuffer0, data.inputBuffer1);
// Vertical Filter
SpatialFilter(ctx.cmd, data, effectiveRadius, new Vector2(0.0f, 1.0f), data.inputBuffer0, data.inputBuffer1, data.outputBuffer0, data.outputBuffer1);
});
SSGIDenoiserOutput denoiserOutput = new SSGIDenoiserOutput();
denoiserOutput.outputBuffer0 = passData.outputBuffer0;
denoiserOutput.outputBuffer1 = passData.outputBuffer1;
return(denoiserOutput);
}
}
public void Denoise(CommandBuffer cmd, HDCamera hdCamera,
RTHandle noisyBuffer, RTHandle outputBuffer,
bool halfResolution = false, float historyValidity = 1.0f)
{
// Grab the global illumination volume component
var giSettings = hdCamera.volumeStack.GetComponent <UnityEngine.Rendering.HighDefinition.GlobalIllumination>();
var historyDepthBuffer = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.Depth);
var historyDepthBuffer1 = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.Depth1);
// If the depth textures are not available, we can't denoise
if (historyDepthBuffer == null || historyDepthBuffer1 == null)
{
HDUtils.BlitCameraTexture(cmd, noisyBuffer, outputBuffer);
return;
}
// Compute the dispatch parameters based on if we are half res or not
int tileSize = 8;
int numTilesX, numTilesY;
Vector4 halfScreenSize;
EvaluateDispatchParameters(hdCamera, halfResolution, tileSize, out numTilesX, out numTilesY, out halfScreenSize);
// Pick the right kernel to use
int m_KernelFilter = halfResolution ? m_SpatialFilterHalfKernel : m_SpatialFilterKernel;
// Bind the input scalars
var info = m_SharedRTManager.GetDepthBufferMipChainInfo();
firstMipOffset.Set(HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].x), HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].y));
cmd.SetComputeVectorParam(m_SSGIDenoiserCS, HDShaderIDs._DepthPyramidFirstMipLevelOffset, firstMipOffset);
cmd.SetComputeIntParam(m_SSGIDenoiserCS, HDShaderIDs._IndirectDiffuseSpatialFilter, giSettings.filterRadius);
// Inject half screen size if required
if (halfResolution)
{
cmd.SetComputeVectorParam(m_SSGIDenoiserCS, HDShaderIDs._HalfScreenSize, halfScreenSize);
}
// Bind the input buffers
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthTexture());
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._InputNoisyBuffer, noisyBuffer);
// Bind the output buffer
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._OutputFilteredBuffer, outputBuffer);
// Do the spatial pass
cmd.DispatchCompute(m_SSGIDenoiserCS, m_KernelFilter, numTilesX, numTilesY, hdCamera.viewCount);
// Grab the history buffer
RTHandle indirectDiffuseHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuseHF);
if (indirectDiffuseHistory == null)
{
indirectDiffuseHistory = hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuseHF, IndirectDiffuseHistoryBufferAllocatorFunction, 1);
// clear it to black if this is the first pass to avoid nans
CoreUtils.SetRenderTarget(cmd, indirectDiffuseHistory, ClearFlag.Color, clearColor: Color.black);
}
// Pick the right kernel to use
m_KernelFilter = halfResolution ? m_TemporalFilterHalfKernel : m_TemporalFilterKernel;
// Bind the input buffers
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthTexture());
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeFloatParam(m_SSGIDenoiserCS, HDShaderIDs._HistoryValidity, historyValidity);
if (halfResolution)
{
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._HistoryDepthTexture, historyDepthBuffer1);
cmd.SetComputeVectorParam(m_SSGIDenoiserCS, HDShaderIDs._DepthPyramidFirstMipLevelOffset, firstMipOffset);
}
else
{
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._HistoryDepthTexture, historyDepthBuffer);
}
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._HistoryBuffer, indirectDiffuseHistory);
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._InputNoisyBuffer, outputBuffer);
// Bind the output buffer
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_KernelFilter, HDShaderIDs._OutputFilteredBuffer, noisyBuffer);
// Do the temporal pass
cmd.DispatchCompute(m_SSGIDenoiserCS, m_KernelFilter, numTilesX, numTilesY, hdCamera.viewCount);
// Copy the new version into the history buffer
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_CopyHistory, HDShaderIDs._InputNoisyBuffer, noisyBuffer);
cmd.SetComputeTextureParam(m_SSGIDenoiserCS, m_CopyHistory, HDShaderIDs._OutputFilteredBuffer, indirectDiffuseHistory);
cmd.DispatchCompute(m_SSGIDenoiserCS, m_CopyHistory, numTilesX, numTilesY, hdCamera.viewCount);
}
void RenderSSGI(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// Grab the global illumination volume component
GlobalIllumination giSettings = hdCamera.volumeStack.GetComponent <GlobalIllumination>();
// Grab the noise texture manager
BlueNoise blueNoise = GetBlueNoiseManager();
// Grab the shaders we shall be using
ComputeShader ssGICS = m_Asset.renderPipelineResources.shaders.screenSpaceGlobalIlluminationCS;
// Evaluate the dispatch parameters
int texWidth, texHeight;
if (giSettings.fullResolutionSS)
{
texWidth = hdCamera.actualWidth;
texHeight = hdCamera.actualHeight;
halfScreenSize.Set(texWidth * 0.5f, texHeight * 0.5f, 2.0f / texWidth, 2.0f / texHeight);
}
else
{
texWidth = hdCamera.actualWidth / 2;
texHeight = hdCamera.actualHeight / 2;
halfScreenSize.Set(texWidth, texHeight, 1.0f / texWidth, 1.0f / texHeight);
}
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Based on if we are doing it in half resolution or full, we need to define initial and final buffer to avoid a useless blit
RTHandle buffer0, buffer1;
if (!giSettings.fullResolutionSS)
{
buffer0 = m_IndirectDiffuseBuffer0;
buffer1 = m_IndirectDiffuseBuffer1;
}
else
{
buffer0 = m_IndirectDiffuseBuffer1;
buffer1 = m_IndirectDiffuseBuffer0;
}
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.SsgiPass)))
{
// Fetch the right tracing kernel
int currentKernel = giSettings.fullResolutionSS ? m_TraceGlobalIlluminationKernel : m_TraceGlobalIlluminationHalfKernel;
// Inject all the input scalars
float n = hdCamera.camera.nearClipPlane;
float f = hdCamera.camera.farClipPlane;
float thickness = giSettings.depthBufferThickness.value;
float thicknessScale = 1.0f / (1.0f + thickness);
float thicknessBias = -n / (f - n) * (thickness * thicknessScale);
cmd.SetComputeFloatParam(ssGICS, HDShaderIDs._IndirectDiffuseThicknessScale, thicknessScale);
cmd.SetComputeFloatParam(ssGICS, HDShaderIDs._IndirectDiffuseThicknessBias, thicknessBias);
cmd.SetComputeIntParam(ssGICS, HDShaderIDs._IndirectDiffuseSteps, giSettings.raySteps);
cmd.SetComputeFloatParam(ssGICS, HDShaderIDs._IndirectDiffuseMaximalRadius, giSettings.maximalRadius);
// Inject half screen size if required
if (!giSettings.fullResolutionSS)
{
cmd.SetComputeVectorParam(ssGICS, HDShaderIDs._HalfScreenSize, halfScreenSize);
}
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData1SPP(cmd);
// Inject all the input textures/buffers
cmd.SetComputeTextureParam(ssGICS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthTexture());
cmd.SetComputeTextureParam(ssGICS, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(ssGICS, currentKernel, HDShaderIDs._IndirectDiffuseHitPointTextureRW, m_IndirectDiffuseHitPointBuffer);
var info = m_SharedRTManager.GetDepthBufferMipChainInfo();
cmd.SetComputeBufferParam(ssGICS, currentKernel, HDShaderIDs._DepthPyramidMipLevelOffsets, info.GetOffsetBufferData(m_DepthPyramidMipLevelOffsetsBuffer));
cmd.SetGlobalBuffer(HDShaderIDs.g_vLightListGlobal, m_TileAndClusterData.lightList);
// Do the ray marching
cmd.DispatchCompute(ssGICS, currentKernel, numTilesXHR, numTilesYHR, hdCamera.viewCount);
// Fetch the right kernel to use
currentKernel = giSettings.fullResolutionSS ? m_ReprojectGlobalIlluminationKernel : m_ReprojectGlobalIlluminationHalfKernel;
// Update global constant buffer.
// This should probably be a shader specific uniform instead of reusing the global constant buffer one since it's the only one udpated here.
m_ShaderVariablesRayTracingCB._RaytracingIntensityClamp = giSettings.clampValueSS;
ConstantBuffer.PushGlobal(cmd, m_ShaderVariablesRayTracingCB, HDShaderIDs._ShaderVariablesRaytracing);
// Inject all the input scalars
cmd.SetComputeVectorParam(ssGICS, HDShaderIDs._ColorPyramidUvScaleAndLimitPrevFrame, HDUtils.ComputeViewportScaleAndLimit(hdCamera.historyRTHandleProperties.previousViewportSize, hdCamera.historyRTHandleProperties.previousRenderTargetSize));
// Bind all the input buffers
cmd.SetComputeTextureParam(ssGICS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(ssGICS, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(ssGICS, currentKernel, HDShaderIDs._IndirectDiffuseHitPointTexture, m_IndirectDiffuseHitPointBuffer);
var previousColorPyramid = hdCamera.GetPreviousFrameRT((int)HDCameraFrameHistoryType.ColorBufferMipChain);
cmd.SetComputeTextureParam(ssGICS, currentKernel, HDShaderIDs._ColorPyramidTexture, previousColorPyramid != null ? previousColorPyramid : TextureXR.GetBlackTexture());
var historyDepthBuffer = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.Depth);
cmd.SetComputeTextureParam(ssGICS, currentKernel, HDShaderIDs._HistoryDepthTexture, historyDepthBuffer != null ? historyDepthBuffer : TextureXR.GetBlackTexture());
cmd.SetComputeBufferParam(ssGICS, currentKernel, HDShaderIDs._DepthPyramidMipLevelOffsets, info.GetOffsetBufferData(m_DepthPyramidMipLevelOffsetsBuffer));
// Bind the output texture
cmd.SetComputeTextureParam(ssGICS, currentKernel, HDShaderIDs._IndirectDiffuseTextureRW, buffer1);
// Do the reprojection
cmd.DispatchCompute(ssGICS, currentKernel, numTilesXHR, numTilesYHR, hdCamera.viewCount);
float historyValidity = 1.0f;
#if UNITY_HDRP_DXR_TESTS_DEFINE
if (Application.isPlaying)
{
historyValidity = 0.0f;
}
else
#endif
// We need to check if something invalidated the history buffers
historyValidity *= ValidRayTracingHistory(hdCamera) ? 1.0f : 0.0f;
// Do the denoising part
SSGIDenoiser ssgiDenoiser = GetSSGIDenoiser();
ssgiDenoiser.Denoise(cmd, hdCamera, buffer1, buffer0, halfResolution: !giSettings.fullResolutionSS, historyValidity: historyValidity);
// If this was a half resolution effect, we still have to upscale it
if (!giSettings.fullResolutionSS)
{
ComputeShader bilateralUpsampleCS = m_Asset.renderPipelineResources.shaders.bilateralUpsampleCS;
// Re-evaluate the dispatch parameters (we are evaluating the upsample in full resolution)
numTilesXHR = (hdCamera.actualWidth + (areaTileSize - 1)) / areaTileSize;
numTilesYHR = (hdCamera.actualHeight + (areaTileSize - 1)) / areaTileSize;
// Inject the input scalars
cmd.SetComputeVectorParam(bilateralUpsampleCS, HDShaderIDs._HalfScreenSize, halfScreenSize);
firstMipOffset.Set(HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].x), HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].y));
cmd.SetComputeVectorParam(bilateralUpsampleCS, HDShaderIDs._DepthPyramidFirstMipLevelOffset, firstMipOffset);
// Inject all the input buffers
cmd.SetComputeTextureParam(bilateralUpsampleCS, m_BilateralUpSampleColorTMKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthTexture());
cmd.SetComputeTextureParam(bilateralUpsampleCS, m_BilateralUpSampleColorTMKernel, HDShaderIDs._LowResolutionTexture, buffer1);
cmd.SetComputeBufferParam(bilateralUpsampleCS, m_BilateralUpSampleColorTMKernel, HDShaderIDs._DepthPyramidMipLevelOffsets, info.GetOffsetBufferData(m_DepthPyramidMipLevelOffsetsBuffer));
// Inject the output textures
cmd.SetComputeTextureParam(bilateralUpsampleCS, m_BilateralUpSampleColorTMKernel, HDShaderIDs._OutputUpscaledTexture, buffer0);
// Upscale the buffer to full resolution
cmd.DispatchCompute(bilateralUpsampleCS, m_BilateralUpSampleColorTMKernel, numTilesXHR, numTilesYHR, hdCamera.viewCount);
}
(RenderPipelineManager.currentPipeline as HDRenderPipeline).PushFullScreenDebugTexture(hdCamera, cmd, m_IndirectDiffuseBuffer0, FullScreenDebugMode.ScreenSpaceGlobalIllumination);
}
}
void EvaluateClusterDebugView(CommandBuffer cmd, HDCamera hdCamera, HDRaytracingEnvironment currentEnv)
{
ComputeShader lightClusterDebugCS = m_RenderPipelineRayTracingResources.lightClusterDebugCS;
if (lightClusterDebugCS == null)
{
return;
}
Texture2D gradientTexture = m_RenderPipelineResources.textures.colorGradient;
if (gradientTexture == null)
{
return;
}
// Grab the kernel
int m_LightClusterDebugKernel = lightClusterDebugCS.FindKernel("DebugLightCluster");
// Inject all the parameters to the debug compute
cmd.SetComputeBufferParam(lightClusterDebugCS, m_LightClusterDebugKernel, HDShaderIDs._RaytracingLightCluster, m_LightCluster);
cmd.SetComputeVectorParam(lightClusterDebugCS, HDShaderIDs._MinClusterPos, minClusterPos);
cmd.SetComputeVectorParam(lightClusterDebugCS, HDShaderIDs._MaxClusterPos, maxClusterPos);
cmd.SetComputeVectorParam(lightClusterDebugCS, _ClusterCellSize, clusterCellSize);
cmd.SetComputeFloatParam(lightClusterDebugCS, HDShaderIDs._LightPerCellCount, HDShadowUtils.Asfloat(numLightsPerCell));
cmd.SetComputeTextureParam(lightClusterDebugCS, m_LightClusterDebugKernel, _DebugColorGradientTexture, gradientTexture);
cmd.SetComputeTextureParam(lightClusterDebugCS, m_LightClusterDebugKernel, HDShaderIDs._CameraDepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
// Target output texture
cmd.SetComputeTextureParam(lightClusterDebugCS, m_LightClusterDebugKernel, _DebutLightClusterTexture, m_DebugLightClusterTexture);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Dispatch the compute
int lightVolumesTileSize = 8;
int numTilesX = (texWidth + (lightVolumesTileSize - 1)) / lightVolumesTileSize;
int numTilesY = (texHeight + (lightVolumesTileSize - 1)) / lightVolumesTileSize;
cmd.DispatchCompute(lightClusterDebugCS, m_LightClusterDebugKernel, numTilesX, numTilesY, 1);
}
