256 lines
22 KiB
Plaintext
256 lines
22 KiB
Plaintext
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Allocate A<> Allocate A<> Allocate A<> PatchAllocation.compute ( #pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal glcore ps5
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#pragma kernel Allocate
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#define PATCH_UTIL_USE_RW_IRRADIANCE_BUFFER
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#define PATCH_UTIL_USE_RW_CELL_INDEX_BUFFER
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#define PATCH_UTIL_USE_RW_CELL_ALLOCATION_MARK_BUFFER
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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#include "Packages/com.unity.render-pipelines.core/Runtime/Sampling/Hashes.hlsl"
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#include "SurfaceCacheCore/VectorLogic.hlsl"
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#include "SurfaceCacheCore/IrradianceCompression.hlsl"
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#include "SurfaceCacheCore/PatchUtil.hlsl"
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RWStructuredBuffer<uint> _RingConfigBuffer;
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RWStructuredBuffer<PatchUtil::PatchGeometry> _PatchGeometries;
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RWStructuredBuffer<uint> _PatchCellIndices;
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RWStructuredBuffer<PatchUtil::PatchCounterSet> _PatchCounterSets;
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RWStructuredBuffer<SphericalHarmonics::RGBL1> _PatchIrradiances0;
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RWStructuredBuffer<SphericalHarmonics::RGBL1> _PatchIrradiances1;
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RWStructuredBuffer<uint> _CellAllocationMarks;
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RWStructuredBuffer<uint> _CellPatchIndices;
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StructuredBuffer<int3> _CascadeOffsets;
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Texture2D<float> _CurrentFullResScreenDepths;
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Texture2D<float3> _CurrentFullResScreenFlatNormals;
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Texture2D<float2> _CurrentFullResScreenMotionVectors;
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Texture2D<float3> _PreviousLowResScreenIrradiancesL0;
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Texture2D<float3> _PreviousLowResScreenIrradiancesL10;
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Texture2D<float3> _PreviousLowResScreenIrradiancesL11;
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Texture2D<float3> _PreviousLowResScreenIrradiancesL12;
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Texture2D<float> _PreviousLowResScreenNdcDepths;
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uint _FrameIdx;
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uint _GridSize;
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float _VoxelMinSize;
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uint _CascadeCount;
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uint _RingConfigOffset;
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float4x4 _CurrentClipToWorldTransform;
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float4x4 _PreviousClipToWorldTransform;
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float3 _GridTargetPos;
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uint2 _LowResScreenSize;
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uint2 _FullResPixelOffset;
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int _UseMotionVectorSeeding;
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uint CountLeadingZeroes(uint x)
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{
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// Note that this assumes firstbithigh(0) = -1.
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return 31 - firstbithigh(x);
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}
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// https://andrew-helmer.github.io/permute/
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// https://graphics.pixar.com/library/MultiJitteredSampling/
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uint RandomPermute(uint idx, uint len, uint seed)
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{
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const uint mask = 0xFFFFFFFF >> CountLeadingZeroes(len - 1);
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// This max guard is required and it is not clear why.
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// https://jira.unity3d.com/browse/GFXLIGHT-1616
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const uint iterMax = 16;
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uint iterCount = 0;
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do {
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idx ^= seed;
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idx *= 0xe170893d;
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idx ^= seed >> 16;
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idx ^= (idx & mask) >> 4;
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idx ^= seed >> 8;
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idx *= 0x0929eb3f;
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idx ^= seed >> 23;
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idx ^= (idx & mask) >> 1;
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idx *= 1 | seed >> 27;
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idx *= 0x6935fa69;
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idx ^= (idx & mask) >> 11;
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idx *= 0x74dcb303;
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idx ^= (idx & mask) >> 2;
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idx *= 0x9e501cc3;
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idx ^= (idx & mask) >> 2;
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idx *= 0xc860a3df;
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idx &= mask;
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idx ^= idx >> 5;
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iterCount++;
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} while (idx >= len && iterCount < iterMax);
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return idx;
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}
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#define GROUP_SIZE 8
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[numthreads(GROUP_SIZE, GROUP_SIZE, 1)]
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void Allocate(uint2 lowResPixelPos : SV_DispatchThreadID)
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{
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if (any(lowResPixelPos >= _LowResScreenSize))
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return;
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const uint lowResThreadPosIndex = lowResPixelPos.y * _LowResScreenSize.x + lowResPixelPos.x;
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const uint shuffleHash = LowBiasHash32(_FrameIdx, 1); // We pass a seed of 1 to avoid the degenerate zero case.
|
|||
|
|
const uint shuffledLowResThreadPosIndex = RandomPermute(lowResThreadPosIndex, _LowResScreenSize.x * _LowResScreenSize.y, shuffleHash);
|
|||
|
|
lowResPixelPos = uint2(shuffledLowResThreadPosIndex % _LowResScreenSize.x, shuffledLowResThreadPosIndex / _LowResScreenSize.x);
|
|||
|
|
|
|||
|
|
const uint2 fullResPixelPos = lowResPixelPos * lowResScreenScaling + _FullResPixelOffset;
|
|||
|
|
uint2 fullResScreenSize;
|
|||
|
|
_CurrentFullResScreenDepths.GetDimensions(fullResScreenSize.x, fullResScreenSize.y);
|
|||
|
|
|
|||
|
|
if (any(fullResPixelPos >= fullResScreenSize))
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
const float ndcDepth = LoadNdcDepth(_CurrentFullResScreenDepths, fullResPixelPos);
|
|||
|
|
if (ndcDepth == invalidNdcDepth)
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
const float2 rcpFullResScreenSize = rcp(float2(fullResScreenSize));
|
|||
|
|
|
|||
|
|
const float2 sourceUvPos = PixelPosToUvPos(fullResPixelPos, rcpFullResScreenSize);
|
|||
|
|
const float3 sourceWorldPosition = ComputeWorldSpacePosition(sourceUvPos, ndcDepth, _CurrentClipToWorldTransform);
|
|||
|
|
const float3 sourceWorldFlatNormal = _CurrentFullResScreenFlatNormals[fullResPixelPos];
|
|||
|
|
|
|||
|
|
PatchUtil::VolumePositionResolution patchPosResolution = PatchUtil::ResolveVolumePosition(sourceWorldPosition, _GridTargetPos, _GridSize, _CascadeOffsets, _CascadeCount, _VoxelMinSize);
|
|||
|
|
|
|||
|
|
if (patchPosResolution.isValid())
|
|||
|
|
{
|
|||
|
|
const uint directionIdx = PatchUtil::GetDirectionIndex(sourceWorldFlatNormal, PatchUtil::gridCellAngularResolution);
|
|||
|
|
const uint3 positionStorageSpace = PatchUtil::ConvertGridSpaceToStorageSpace(patchPosResolution.positionGridSpace, _GridSize, _CascadeOffsets[patchPosResolution.cascadeIdx]);
|
|||
|
|
const uint cellIdx = PatchUtil::GetCellIndex(patchPosResolution.cascadeIdx, positionStorageSpace, directionIdx, _GridSize, PatchUtil::gridCellAngularResolution);
|
|||
|
|
|
|||
|
|
PatchUtil::PatchIndexResolutionResult resolutionResult = PatchUtil::ResolvePatchIndex(
|
|||
|
|
_RingConfigBuffer,
|
|||
|
|
_RingConfigOffset,
|
|||
|
|
_CellPatchIndices,
|
|||
|
|
_CellAllocationMarks,
|
|||
|
|
cellIdx);
|
|||
|
|
|
|||
|
|
if (resolutionResult.code != PatchUtil::patchIndexResolutionCodeAllocationFailure)
|
|||
|
|
{
|
|||
|
|
PatchUtil::PatchGeometry geo;
|
|||
|
|
geo.position = sourceWorldPosition;
|
|||
|
|
geo.normal = sourceWorldFlatNormal;
|
|||
|
|
_PatchGeometries[resolutionResult.patchIdx] = geo;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (resolutionResult.code == PatchUtil::patchIndexResolutionCodeAllocationSuccess)
|
|||
|
|
{
|
|||
|
|
_PatchCellIndices[resolutionResult.patchIdx] = cellIdx;
|
|||
|
|
|
|||
|
|
PatchUtil::PatchCounterSet counterSet;
|
|||
|
|
PatchUtil::Reset(counterSet);
|
|||
|
|
PatchUtil::SetLastAccessFrame(counterSet, _FrameIdx);
|
|||
|
|
|
|||
|
|
SphericalHarmonics::RGBL1 irradianceSeed = (SphericalHarmonics::RGBL1)0;
|
|||
|
|
if (_FrameIdx != 0)
|
|||
|
|
{
|
|||
|
|
if (_UseMotionVectorSeeding)
|
|||
|
|
{
|
|||
|
|
const float2 threadUvPos = PixelPosToUvPos(fullResPixelPos, rcpFullResScreenSize);
|
|||
|
|
float2 reprojectedThreadUvPos = threadUvPos - _CurrentFullResScreenMotionVectors[fullResPixelPos];
|
|||
|
|
if (all(VECTOR_LOGIC_AND(0.0f < reprojectedThreadUvPos, reprojectedThreadUvPos < 1.0f)))
|
|||
|
|
{
|
|||
|
|
const uint2 reprojectedThreadPixelPos = reprojectedThreadUvPos * fullResScreenSize;
|
|||
|
|
const uint2 seedLowResPixelPos = reprojectedThreadPixelPos / lowResScreenScaling;
|
|||
|
|
const float seedNdcDepth = _PreviousLowResScreenNdcDepths[seedLowResPixelPos];
|
|||
|
|
|
|||
|
|
if (seedNdcDepth != invalidNdcDepth)
|
|||
|
|
{
|
|||
|
|
const float2 seedFullResUvPos = PixelPosToUvPos(seedLowResPixelPos * lowResScreenScaling, rcpFullResScreenSize);
|
|||
|
|
const float3 seedWorldPosition = ComputeWorldSpacePosition(seedFullResUvPos, seedNdcDepth, _PreviousClipToWorldTransform);
|
|||
|
|
const float voxelSize = PatchUtil::GetVoxelSize(_VoxelMinSize, patchPosResolution.cascadeIdx);
|
|||
|
|
const float patchPlaneToSeedPositionDistance = dot(sourceWorldFlatNormal, seedWorldPosition - sourceWorldPosition);
|
|||
|
|
if (patchPlaneToSeedPositionDistance < voxelSize)
|
|||
|
|
{
|
|||
|
|
irradianceSeed = IrradianceCompression::LoadAndDecompress(
|
|||
|
|
_PreviousLowResScreenIrradiancesL0,
|
|||
|
|
_PreviousLowResScreenIrradiancesL10,
|
|||
|
|
_PreviousLowResScreenIrradiancesL11,
|
|||
|
|
_PreviousLowResScreenIrradiancesL12,
|
|||
|
|
seedLowResPixelPos);
|
|||
|
|
|
|||
|
|
if (PatchUtil::IsValid(irradianceSeed))
|
|||
|
|
PatchUtil::SetUpdateCount(counterSet, PatchUtil::updateMax / 2);
|
|||
|
|
#ifdef SEED_DEBUGGING
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
irradianceSeed = (SphericalHarmonics::RGBL1)0;
|
|||
|
|
PatchUtil::SetUpdateCount(counterSet, PatchUtil::updateMax);
|
|||
|
|
irradianceSeed.l0 = float3(10, 0, 0);
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
}
|
|||
|
|
#ifdef SEED_DEBUGGING
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
PatchUtil::SetUpdateCount(counterSet, PatchUtil::updateMax);
|
|||
|
|
irradianceSeed.l0 = float3(0, 0, 10);
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
irradianceSeed = IrradianceCompression::LoadAndDecompress(
|
|||
|
|
_PreviousLowResScreenIrradiancesL0,
|
|||
|
|
_PreviousLowResScreenIrradiancesL10,
|
|||
|
|
_PreviousLowResScreenIrradiancesL11,
|
|||
|
|
_PreviousLowResScreenIrradiancesL12,
|
|||
|
|
lowResPixelPos);
|
|||
|
|
|
|||
|
|
if (PatchUtil::IsValid(irradianceSeed))
|
|||
|
|
PatchUtil::SetUpdateCount(counterSet, PatchUtil::updateMax / 2);
|
|||
|
|
}
|
|||
|
|
#ifdef SEED_DEBUGGING
|
|||
|
|
// For debugging: Add color to unseeded patches.
|
|||
|
|
if (PatchUtil::GetUpdateCount(counterSet) == 0)
|
|||
|
|
{
|
|||
|
|
PatchUtil::SetUpdateCount(counterSet, PatchUtil::updateMax);
|
|||
|
|
irradianceSeed.l0 = float3(0, 10, 0);
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
_PatchIrradiances0[resolutionResult.patchIdx] = irradianceSeed;
|
|||
|
|
_PatchIrradiances1[resolutionResult.patchIdx] = irradianceSeed;
|
|||
|
|
_PatchCounterSets[resolutionResult.patchIdx] = counterSet;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
m Packages/com.unity.render-pipelines.universal/Runtime/RendererFeatures/SurfaceCacheGI/PatchAllocation.compute Allocate <10><> :f<><66><EFBFBD>q<EFBFBD> M <0B>ʹ{
|