void PushVolumetricLightingGlobalParams(HDCamera hdCamera, CommandBuffer cmd, int frameIndex)
{
if (!Fog.IsVolumetricLightingEnabled(hdCamera))
{
cmd.SetGlobalTexture(HDShaderIDs._VBufferLighting, HDUtils.clearTexture3D);
return;
}
// Get the interpolated anisotropy value.
var fog = VolumeManager.instance.stack.GetComponent <Fog>();
SetPreconvolvedAmbientLightProbe(cmd, fog.globalLightProbeDimmer.value, fog.anisotropy.value);
var currFrameParams = hdCamera.vBufferParams[0];
var prevFrameParams = hdCamera.vBufferParams[1];
// The lighting & density buffers are shared by all cameras.
// The history & feedback buffers are specific to the camera.
// These 2 types of buffers can have different sizes.
// Additionally, history buffers can have different sizes, since they are not resized at the same time
// (every frame, we swap the buffers, and resize the feedback buffer but not the history buffer).
// The viewport size is the same for all of these buffers.
// All of these buffers may have sub-native-resolution viewports.
// The 3rd dimension (number of slices) is the same for all of these buffers.
Vector2Int sharedBufferSize = new Vector2Int(m_LightingBufferHandle.rt.width, m_LightingBufferHandle.rt.height);
Debug.Assert(m_LightingBufferHandle.rt.width == m_DensityBufferHandle.rt.width);
Debug.Assert(m_LightingBufferHandle.rt.height == m_DensityBufferHandle.rt.height);
Vector2Int historyBufferSize = Vector2Int.zero;
if (hdCamera.IsVolumetricReprojectionEnabled())
{
var historyRT = hdCamera.GetPreviousFrameRT((int)HDCameraFrameHistoryType.VolumetricLighting);
historyBufferSize = new Vector2Int(historyRT.rt.width, historyRT.rt.height);
}
var cvp = currFrameParams.viewportSize;
var pvp = prevFrameParams.viewportSize;
// Adjust slices for XR rendering: VBuffer is shared for all single-pass views
int sliceCount = cvp.z / hdCamera.viewCount;
cmd.SetGlobalVector(HDShaderIDs._VBufferViewportSize, new Vector4(cvp.x, cvp.y, 1.0f / cvp.x, 1.0f / cvp.y));
cmd.SetGlobalInt(HDShaderIDs._VBufferSliceCount, sliceCount);
cmd.SetGlobalFloat(HDShaderIDs._VBufferRcpSliceCount, 1.0f / sliceCount);
cmd.SetGlobalVector(HDShaderIDs._VBufferSharedUvScaleAndLimit, currFrameParams.ComputeUvScaleAndLimit(sharedBufferSize));
cmd.SetGlobalVector(HDShaderIDs._VBufferDistanceEncodingParams, currFrameParams.depthEncodingParams);
cmd.SetGlobalVector(HDShaderIDs._VBufferDistanceDecodingParams, currFrameParams.depthDecodingParams);
cmd.SetGlobalFloat(HDShaderIDs._VBufferLastSliceDist, currFrameParams.ComputeLastSliceDistance(sliceCount));
cmd.SetGlobalFloat(HDShaderIDs._VBufferRcpInstancedViewCount, 1.0f / hdCamera.viewCount);
cmd.SetGlobalVector(HDShaderIDs._VBufferPrevViewportSize, new Vector4(pvp.x, pvp.y, 1.0f / pvp.x, 1.0f / pvp.y));
cmd.SetGlobalVector(HDShaderIDs._VBufferHistoryPrevUvScaleAndLimit, prevFrameParams.ComputeUvScaleAndLimit(historyBufferSize));
cmd.SetGlobalVector(HDShaderIDs._VBufferPrevDepthEncodingParams, prevFrameParams.depthEncodingParams);
cmd.SetGlobalVector(HDShaderIDs._VBufferPrevDepthDecodingParams, prevFrameParams.depthDecodingParams);
cmd.SetGlobalTexture(HDShaderIDs._VBufferLighting, m_LightingBufferHandle);
}
public TextureHandle Render(RenderGraph renderGraph, HDCamera hdCamera, TextureHandle depthPyramid, TextureHandle motionVectors, int frameCount)
{
var settings = hdCamera.volumeStack.GetComponent <AmbientOcclusion>();
TextureHandle result;
// AO has side effects (as it uses an imported history buffer)
// So we can't rely on automatic pass stripping. This is why we have to be explicit here.
if (IsActive(hdCamera, settings))
{
{
EnsureRTSize(settings, hdCamera);
var historyRT = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.AmbientOcclusion);
var currentHistory = renderGraph.ImportTexture(historyRT);
var outputHistory = renderGraph.ImportTexture(hdCamera.GetPreviousFrameRT((int)HDCameraFrameHistoryType.AmbientOcclusion));
Vector2 historySize = new Vector2(historyRT.referenceSize.x * historyRT.scaleFactor.x,
historyRT.referenceSize.y * historyRT.scaleFactor.y);
var rtScaleForHistory = hdCamera.historyRTHandleProperties.rtHandleScale;
var aoParameters = PrepareRenderAOParameters(hdCamera, renderGraph.rtHandleProperties, historySize * rtScaleForHistory, frameCount);
var packedData = RenderAO(renderGraph, aoParameters, depthPyramid);
result = DenoiseAO(renderGraph, aoParameters, motionVectors, packedData, currentHistory, outputHistory);
}
}
else
{
result = renderGraph.ImportTexture(TextureXR.GetBlackTexture(), HDShaderIDs._AmbientOcclusionTexture);
}
return(result);
}
public RenderGraphResource Render(RenderGraph renderGraph, HDCamera hdCamera, RenderGraphResource depthPyramid, RenderGraphResource motionVectors, int frameCount)
{
var settings = VolumeManager.instance.stack.GetComponent <AmbientOcclusion>();
RenderGraphResource result;
// AO has side effects (as it uses an imported history buffer)
// So we can't rely on automatic pass stripping. This is why we have to be explicit here.
if (IsActive(hdCamera, settings))
{
{
EnsureRTSize(settings, hdCamera);
var aoParameters = PrepareRenderAOParameters(hdCamera, renderGraph.rtHandleProperties, frameCount);
var currentHistory = renderGraph.ImportTexture(hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.AmbientOcclusion));
var outputHistory = renderGraph.ImportTexture(hdCamera.GetPreviousFrameRT((int)HDCameraFrameHistoryType.AmbientOcclusion));
var packedData = RenderAO(renderGraph, aoParameters, depthPyramid);
result = DenoiseAO(renderGraph, aoParameters, motionVectors, packedData, currentHistory, outputHistory);
}
}
else
{
result = renderGraph.ImportTexture(TextureXR.GetBlackTexture(), HDShaderIDs._AmbientOcclusionTexture);
}
return(result);
}
TraceOutput TraceSSGI(RenderGraph renderGraph, HDCamera hdCamera, GlobalIllumination giSettings, TextureHandle depthPyramid, TextureHandle normalBuffer, TextureHandle motionVectorsBuffer)
{
using (var builder = renderGraph.AddRenderPass <TraceSSGIPassData>("Trace SSGI", out var passData, ProfilingSampler.Get(HDProfileId.SSGITrace)))
{
builder.EnableAsyncCompute(false);
passData.parameters = PrepareSSGITraceParameters(hdCamera, giSettings);
passData.depthTexture = builder.ReadTexture(depthPyramid);
passData.normalBuffer = builder.ReadTexture(normalBuffer);
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.ObjectMotionVectors))
{
passData.motionVectorsBuffer = builder.ReadTexture(renderGraph.defaultResources.blackTextureXR);
}
else
{
passData.motionVectorsBuffer = builder.ReadTexture(motionVectorsBuffer);
}
var colorPyramid = hdCamera.GetPreviousFrameRT((int)HDCameraFrameHistoryType.ColorBufferMipChain);
passData.colorPyramid = colorPyramid != null?builder.ReadTexture(renderGraph.ImportTexture(colorPyramid)) : renderGraph.defaultResources.blackTextureXR;
var historyDepth = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.Depth);
passData.historyDepth = historyDepth != null?builder.ReadTexture(renderGraph.ImportTexture(historyDepth)) : renderGraph.defaultResources.blackTextureXR;
passData.hitPointBuffer = builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "SSGI Hit Point"
});
passData.outputBuffer0 = builder.WriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "SSGI Signal0"
}));
passData.outputBuffer1 = builder.WriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "SSGI Signal1"
}));
builder.SetRenderFunc(
(TraceSSGIPassData data, RenderGraphContext ctx) =>
{
// We need to fill the structure that holds the various resources
SSGITraceResources resources = new SSGITraceResources();
resources.depthTexture = data.depthTexture;
resources.normalBuffer = data.normalBuffer;
resources.motionVectorsBuffer = data.motionVectorsBuffer;
resources.colorPyramid = data.colorPyramid;
resources.historyDepth = data.historyDepth;
resources.hitPointBuffer = data.hitPointBuffer;
resources.outputBuffer0 = data.outputBuffer0;
resources.outputBuffer1 = data.outputBuffer1;
ExecuteSSGITrace(ctx.cmd, data.parameters, resources);
});
TraceOutput traceOutput = new TraceOutput();
traceOutput.outputBuffer0 = passData.outputBuffer0;
traceOutput.outputBuffer1 = passData.outputBuffer1;
return(traceOutput);
}
}
SSGITraceResources PrepareSSGITraceResources(HDCamera hdCamera, RTHandle outputBuffer, RTHandle hitPointBuffer)
{
SSGITraceResources ssgiTraceResources = new SSGITraceResources();
// Input buffers
ssgiTraceResources.depthTexture = m_SharedRTManager.GetDepthTexture();
ssgiTraceResources.normalBuffer = m_SharedRTManager.GetNormalBuffer();
ssgiTraceResources.motionVectorsBuffer = m_SharedRTManager.GetMotionVectorsBuffer();
var previousColorPyramid = hdCamera.GetPreviousFrameRT((int)HDCameraFrameHistoryType.ColorBufferMipChain);
ssgiTraceResources.colorPyramid = previousColorPyramid != null ? previousColorPyramid : TextureXR.GetBlackTexture();
var historyDepthBuffer = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.Depth);
ssgiTraceResources.historyDepth = historyDepthBuffer != null ? historyDepthBuffer : TextureXR.GetBlackTexture();
// Output buffers
ssgiTraceResources.hitPointBuffer = hitPointBuffer;
// Output buffers
ssgiTraceResources.outputBuffer = outputBuffer;
return(ssgiTraceResources);
}
static RTHandle RequestPreviousVolumetricCloudsHistoryTexture1(HDCamera hdCamera)
{
return(hdCamera.GetPreviousFrameRT((int)HDCameraFrameHistoryType.VolumetricClouds1)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.VolumetricClouds1,
VolumetricClouds1HistoryBufferAllocatorFunction, 2));
}
TraceOutput TraceSSGI(RenderGraph renderGraph, HDCamera hdCamera, GlobalIllumination giSettings, TextureHandle depthPyramid, TextureHandle normalBuffer, TextureHandle stencilBuffer, TextureHandle motionVectorsBuffer)
{
using (var builder = renderGraph.AddRenderPass <TraceSSGIPassData>("Trace SSGI", out var passData, ProfilingSampler.Get(HDProfileId.SSGITrace)))
{
builder.EnableAsyncCompute(false);
//if (true)
{
passData.texWidth = hdCamera.actualWidth;
passData.texHeight = hdCamera.actualHeight;
passData.halfScreenSize.Set(passData.texWidth * 0.5f, passData.texHeight * 0.5f, 2.0f / passData.texWidth, 2.0f / passData.texHeight);
}
/*
* else
* {
* passData.texWidth = hdCamera.actualWidth / 2;
* passData.texHeight = hdCamera.actualHeight / 2;
* passData.halfScreenSize.Set(passData.texWidth, passData.texHeight, 1.0f / passData.texWidth, 1.0f / passData.texHeight);
* }
*/
passData.viewCount = hdCamera.viewCount;
// Set the generation parameters
passData.nearClipPlane = hdCamera.camera.nearClipPlane;
passData.farClipPlane = hdCamera.camera.farClipPlane;
passData.fullResolutionSS = true;
passData.thickness = giSettings.depthBufferThickness.value;
passData.raySteps = giSettings.maxRaySteps;
passData.frameIndex = RayTracingFrameIndex(hdCamera, 16);
passData.colorPyramidUvScaleAndLimitPrevFrame = HDUtils.ComputeViewportScaleAndLimit(hdCamera.historyRTHandleProperties.previousViewportSize, hdCamera.historyRTHandleProperties.previousRenderTargetSize);
// Grab the right kernel
passData.ssGICS = asset.renderPipelineResources.shaders.screenSpaceGlobalIlluminationCS;
passData.traceKernel = true ? m_TraceGlobalIlluminationKernel : m_TraceGlobalIlluminationHalfKernel;
passData.projectKernel = true ? m_ReprojectGlobalIlluminationKernel : m_ReprojectGlobalIlluminationHalfKernel;
BlueNoise blueNoise = GetBlueNoiseManager();
passData.ditheredTextureSet = blueNoise.DitheredTextureSet8SPP();
passData.shaderVariablesRayTracingCB = m_ShaderVariablesRayTracingCB;
passData.offsetBuffer = m_DepthBufferMipChainInfo.GetOffsetBufferData(m_DepthPyramidMipLevelOffsetsBuffer);
passData.depthTexture = builder.ReadTexture(depthPyramid);
passData.normalBuffer = builder.ReadTexture(normalBuffer);
passData.stencilBuffer = builder.ReadTexture(stencilBuffer);
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.ObjectMotionVectors))
{
passData.motionVectorsBuffer = builder.ReadTexture(renderGraph.defaultResources.blackTextureXR);
}
else
{
passData.motionVectorsBuffer = builder.ReadTexture(motionVectorsBuffer);
}
// History buffers
var colorPyramid = hdCamera.GetPreviousFrameRT((int)HDCameraFrameHistoryType.ColorBufferMipChain);
passData.colorPyramid = colorPyramid != null?builder.ReadTexture(renderGraph.ImportTexture(colorPyramid)) : renderGraph.defaultResources.blackTextureXR;
var historyDepth = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.Depth);
passData.historyDepth = historyDepth != null?builder.ReadTexture(renderGraph.ImportTexture(historyDepth)) : renderGraph.defaultResources.blackTextureXR;
// Temporary textures
passData.hitPointBuffer = builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16_SFloat, enableRandomWrite = true, name = "SSGI Hit Point"
});
// Output textures
passData.outputBuffer0 = builder.WriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.B10G11R11_UFloatPack32, enableRandomWrite = true, name = "SSGI Color"
}));
passData.outputBuffer1 = builder.WriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16_SFloat, enableRandomWrite = true, name = "SSGI Additional Data"
}));
builder.SetRenderFunc(
(TraceSSGIPassData data, RenderGraphContext ctx) =>
{
int ssgiTileSize = 8;
int numTilesXHR = (data.texWidth + (ssgiTileSize - 1)) / ssgiTileSize;
int numTilesYHR = (data.texHeight + (ssgiTileSize - 1)) / ssgiTileSize;
// Inject all the input scalars
float n = data.nearClipPlane;
float f = data.farClipPlane;
float thicknessScale = 1.0f / (1.0f + data.thickness);
float thicknessBias = -n / (f - n) * (data.thickness * thicknessScale);
ctx.cmd.SetComputeFloatParam(data.ssGICS, HDShaderIDs._RayMarchingThicknessScale, thicknessScale);
ctx.cmd.SetComputeFloatParam(data.ssGICS, HDShaderIDs._RayMarchingThicknessBias, thicknessBias);
ctx.cmd.SetComputeIntParam(data.ssGICS, HDShaderIDs._RayMarchingSteps, data.raySteps);
ctx.cmd.SetComputeIntParam(data.ssGICS, HDShaderIDs._RayMarchingReflectSky, 1);
ctx.cmd.SetComputeIntParam(data.ssGICS, HDShaderIDs._IndirectDiffuseFrameIndex, data.frameIndex);
// Inject half screen size if required
if (!data.fullResolutionSS)
{
ctx.cmd.SetComputeVectorParam(data.ssGICS, HDShaderIDs._HalfScreenSize, data.halfScreenSize);
}
// Inject the ray-tracing sampling data
BlueNoise.BindDitheredTextureSet(ctx.cmd, data.ditheredTextureSet);
// Inject all the input textures/buffers
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.traceKernel, HDShaderIDs._DepthTexture, data.depthTexture);
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.traceKernel, HDShaderIDs._NormalBufferTexture, data.normalBuffer);
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.traceKernel, HDShaderIDs._IndirectDiffuseHitPointTextureRW, data.hitPointBuffer);
ctx.cmd.SetComputeBufferParam(data.ssGICS, data.traceKernel, HDShaderIDs._DepthPyramidMipLevelOffsets, data.offsetBuffer);
// Do the ray marching
ctx.cmd.DispatchCompute(data.ssGICS, data.traceKernel, numTilesXHR, numTilesYHR, data.viewCount);
// 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 updated here.
ConstantBuffer.PushGlobal(ctx.cmd, data.shaderVariablesRayTracingCB, HDShaderIDs._ShaderVariablesRaytracing);
// Inject all the input scalars
ctx.cmd.SetComputeVectorParam(data.ssGICS, HDShaderIDs._ColorPyramidUvScaleAndLimitPrevFrame, data.colorPyramidUvScaleAndLimitPrevFrame);
ctx.cmd.SetComputeIntParam(data.ssGICS, HDShaderIDs._ObjectMotionStencilBit, (int)StencilUsage.ObjectMotionVector);
// Bind all the input buffers
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.projectKernel, HDShaderIDs._DepthTexture, data.depthTexture);
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.projectKernel, HDShaderIDs._StencilTexture, data.stencilBuffer, 0, RenderTextureSubElement.Stencil);
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.projectKernel, HDShaderIDs._NormalBufferTexture, data.normalBuffer);
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.projectKernel, HDShaderIDs._CameraMotionVectorsTexture, data.motionVectorsBuffer);
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.projectKernel, HDShaderIDs._IndirectDiffuseHitPointTexture, data.hitPointBuffer);
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.projectKernel, HDShaderIDs._ColorPyramidTexture, data.colorPyramid);
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.projectKernel, HDShaderIDs._HistoryDepthTexture, data.historyDepth);
ctx.cmd.SetComputeBufferParam(data.ssGICS, data.projectKernel, HDShaderIDs._DepthPyramidMipLevelOffsets, data.offsetBuffer);
// Bind the output texture
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.projectKernel, HDShaderIDs._IndirectDiffuseTexture0RW, data.outputBuffer0);
ctx.cmd.SetComputeTextureParam(data.ssGICS, data.projectKernel, HDShaderIDs._IndirectDiffuseTexture1RW, data.outputBuffer1);
// Do the reprojection
ctx.cmd.DispatchCompute(data.ssGICS, data.projectKernel, numTilesXHR, numTilesYHR, data.viewCount);
});
TraceOutput traceOutput = new TraceOutput();
traceOutput.outputBuffer0 = passData.outputBuffer0;
traceOutput.outputBuffer1 = passData.outputBuffer1;
return(traceOutput);
}
}
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);
}
}
