forked from BilalY/Rasagar
816 lines
33 KiB
C#
816 lines
33 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using System.Threading;
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using UnityEngine.Assertions;
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using Unity.Burst;
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using Unity.Burst.CompilerServices;
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using Unity.Mathematics;
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using Unity.Collections;
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using Unity.Collections.LowLevel.Unsafe;
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using Unity.Jobs;
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using Unity.Jobs.LowLevel.Unsafe;
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using UnityEngine.Experimental.Rendering;
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using UnityEngine.Rendering.RenderGraphModule;
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namespace UnityEngine.Rendering
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{
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internal struct OccluderDerivedData
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{
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/// <summary></summary>
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public Matrix4x4 viewProjMatrix; // from view-centered world space
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/// <summary></summary>
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public Vector4 viewOriginWorldSpace;
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/// <summary></summary>
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public Vector4 radialDirWorldSpace;
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/// <summary></summary>
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public Vector4 facingDirWorldSpace;
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public static OccluderDerivedData FromParameters(in OccluderSubviewUpdate occluderSubviewUpdate)
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{
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var origin = occluderSubviewUpdate.viewOffsetWorldSpace + (Vector3)occluderSubviewUpdate.invViewMatrix.GetColumn(3); // view origin in world space
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var xViewVec = (Vector3)occluderSubviewUpdate.invViewMatrix.GetColumn(0); // positive x axis in world space
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var yViewVec = (Vector3)occluderSubviewUpdate.invViewMatrix.GetColumn(1); // positive y axis in world space
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var towardsVec = (Vector3)occluderSubviewUpdate.invViewMatrix.GetColumn(2); // positive z axis in world space
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var viewMatrixNoTranslation = occluderSubviewUpdate.viewMatrix;
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viewMatrixNoTranslation.SetColumn(3, new Vector4(0.0f, 0.0f, 0.0f, 1.0f));
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return new OccluderDerivedData
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{
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viewOriginWorldSpace = origin,
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facingDirWorldSpace = towardsVec.normalized,
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radialDirWorldSpace = (xViewVec + yViewVec).normalized,
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viewProjMatrix = occluderSubviewUpdate.gpuProjMatrix * viewMatrixNoTranslation,
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};
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}
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}
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internal struct OccluderHandles
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{
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public TextureHandle occluderDepthPyramid;
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public BufferHandle occlusionDebugOverlay;
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public bool IsValid()
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{
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return occluderDepthPyramid.IsValid();
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}
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public void UseForOcclusionTest(IBaseRenderGraphBuilder builder)
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{
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builder.UseTexture(occluderDepthPyramid, AccessFlags.Read);
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if (occlusionDebugOverlay.IsValid())
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builder.UseBuffer(occlusionDebugOverlay, AccessFlags.ReadWrite);
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}
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public void UseForOccluderUpdate(IBaseRenderGraphBuilder builder)
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{
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builder.UseTexture(occluderDepthPyramid, AccessFlags.ReadWrite);
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if (occlusionDebugOverlay.IsValid())
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builder.UseBuffer(occlusionDebugOverlay, AccessFlags.ReadWrite);
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}
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}
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[GenerateHLSL(needAccessors = false)]
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internal enum InstanceOcclusionTestDebugCounter
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{
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Occluded,
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NotOccluded,
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Count,
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}
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[GenerateHLSL(needAccessors = false)]
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internal struct IndirectInstanceInfo
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{
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public int drawOffsetAndSplitMask; // [31:8]=draw_offset, [7:0]=split_mask
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public int instanceIndexAndCrossFade; // DOTS instance index
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}
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[GenerateHLSL(needAccessors = false)]
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internal struct IndirectDrawInfo
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{
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public uint indexCount;
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public uint firstIndex;
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public uint baseVertex;
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public uint firstInstanceGlobalIndex;
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public uint maxInstanceCount;
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}
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internal struct IndirectBufferAllocInfo
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{
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public int drawAllocIndex;
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public int drawCount;
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public int instanceAllocIndex;
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public int instanceCount;
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public bool IsEmpty()
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{
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return drawCount == 0;
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}
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public bool IsWithinLimits(in IndirectBufferLimits limits)
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{
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return drawAllocIndex + drawCount <= limits.maxDrawCount
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&& instanceAllocIndex + instanceCount <= limits.maxInstanceCount;
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}
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public int GetExtraDrawInfoSlotIndex()
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{
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return drawAllocIndex + drawCount;
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}
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}
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internal struct IndirectBufferContext
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{
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public JobHandle cullingJobHandle;
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public enum BufferState
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{
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Pending, // Not synced with culling output yet
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Zeroed, // All draws have zero instances
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NoOcclusionTest, // Copy the results of CPU frustum/LOD culling
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AllInstancesOcclusionTested, // Occlusion test the results of CPU frustum/LOD culling
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OccludedInstancesReTested, // Re-test previously occluded instances (against updated occluders)
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}
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public BufferState bufferState;
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public int occluderVersion;
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public int subviewMask;
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public IndirectBufferContext(JobHandle cullingJobHandle)
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{
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this.cullingJobHandle = cullingJobHandle;
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this.bufferState = BufferState.Pending;
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this.occluderVersion = 0;
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this.subviewMask = 0;
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}
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public bool Matches(BufferState bufferState, int occluderVersion, int subviewMask)
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{
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return this.bufferState == bufferState
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&& this.occluderVersion == occluderVersion
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&& this.subviewMask == subviewMask;
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}
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}
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internal struct OccluderMipBounds
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{
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public Vector2Int offset;
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public Vector2Int size;
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}
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internal struct OccluderContext : IDisposable
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{
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private static class ShaderIDs
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{
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public static readonly int _SrcDepth = Shader.PropertyToID("_SrcDepth");
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public static readonly int _DstDepth = Shader.PropertyToID("_DstDepth");
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public static readonly int OccluderDepthPyramidConstants = Shader.PropertyToID("OccluderDepthPyramidConstants");
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}
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public const int k_FirstDepthMipIndex = 3; // 8x8 tiles
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public const int k_MaxOccluderMips = (int)OcclusionCullingCommonConfig.MaxOccluderMips;
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public const int k_MaxSilhouettePlanes = (int)OcclusionCullingCommonConfig.MaxOccluderSilhouettePlanes;
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public const int k_MaxSubviewsPerView = (int)OcclusionCullingCommonConfig.MaxSubviewsPerView;
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public int version;
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public Vector2Int depthBufferSize;
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public NativeArray<OccluderDerivedData> subviewData;
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public int subviewCount { get { return subviewData.Length; } }
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public int subviewValidMask;
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public bool IsSubviewValid(int subviewIndex)
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{
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return subviewIndex < subviewCount && (subviewValidMask & (1 << subviewIndex)) != 0;
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}
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public NativeArray<OccluderMipBounds> occluderMipBounds;
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public Vector2Int occluderMipLayoutSize; // total size of 2D layout specified by occluderMipBounds
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public Vector2Int occluderDepthPyramidSize; // at least the size of N mip layouts tiled vertically (one per subview)
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public RTHandle occluderDepthPyramid;
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public int occlusionDebugOverlaySize;
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public GraphicsBuffer occlusionDebugOverlay;
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public bool debugNeedsClear;
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public ComputeBuffer constantBuffer;
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public NativeArray<OccluderDepthPyramidConstants> constantBufferData;
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public Vector2 depthBufferSizeInOccluderPixels {
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get
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{
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int occluderPixelSize = 1 << k_FirstDepthMipIndex;
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return new Vector2(
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(float)depthBufferSize.x / (float)occluderPixelSize,
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(float)depthBufferSize.y / (float)occluderPixelSize);
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}
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}
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public void Dispose()
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{
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if (subviewData.IsCreated)
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subviewData.Dispose();
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if (occluderMipBounds.IsCreated)
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occluderMipBounds.Dispose();
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if (occluderDepthPyramid != null)
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{
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occluderDepthPyramid.Release();
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occluderDepthPyramid = null;
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}
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if (occlusionDebugOverlay != null)
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{
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occlusionDebugOverlay.Release();
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occlusionDebugOverlay = null;
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}
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if (constantBuffer != null)
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{
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constantBuffer.Release();
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constantBuffer = null;
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}
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if (constantBufferData.IsCreated)
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constantBufferData.Dispose();
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}
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private void UpdateMipBounds()
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{
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int occluderPixelSize = 1 << k_FirstDepthMipIndex;
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Vector2Int topMipSize = (depthBufferSize + (occluderPixelSize - 1) * Vector2Int.one) / occluderPixelSize;
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Vector2Int totalSize = Vector2Int.zero;
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Vector2Int mipOffset = Vector2Int.zero;
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Vector2Int mipSize = topMipSize;
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if (!occluderMipBounds.IsCreated)
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occluderMipBounds = new NativeArray<OccluderMipBounds>(k_MaxOccluderMips, Allocator.Persistent);
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for (int mipIndex = 0; mipIndex < k_MaxOccluderMips; ++mipIndex)
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{
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occluderMipBounds[mipIndex] = new OccluderMipBounds { offset = mipOffset, size = mipSize };
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totalSize.x = Mathf.Max(totalSize.x, mipOffset.x + mipSize.x);
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totalSize.y = Mathf.Max(totalSize.y, mipOffset.y + mipSize.y);
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if (mipIndex == 0)
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{
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mipOffset.x = 0;
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mipOffset.y += mipSize.y;
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}
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else
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{
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mipOffset.x += mipSize.x;
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}
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mipSize.x = (mipSize.x + 1) / 2;
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mipSize.y = (mipSize.y + 1) / 2;
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}
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occluderMipLayoutSize = totalSize;
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}
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private void AllocateTexturesIfNecessary(bool debugOverlayEnabled)
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{
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Vector2Int minDepthPyramidSize = new Vector2Int(occluderMipLayoutSize.x, occluderMipLayoutSize.y * subviewCount);
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if (occluderDepthPyramidSize.x < minDepthPyramidSize.x || occluderDepthPyramidSize.y < minDepthPyramidSize.y)
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{
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if (occluderDepthPyramid != null)
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occluderDepthPyramid.Release();
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occluderDepthPyramidSize = minDepthPyramidSize;
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occluderDepthPyramid = RTHandles.Alloc(
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occluderDepthPyramidSize.x, occluderDepthPyramidSize.y,
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dimension: TextureDimension.Tex2D,
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colorFormat: GraphicsFormat.R32_SFloat,
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filterMode: FilterMode.Point,
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wrapMode: TextureWrapMode.Clamp,
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enableRandomWrite: true,
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name: "Occluder Depths");
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}
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int newDebugOverlaySize = debugOverlayEnabled ? (minDepthPyramidSize.x * minDepthPyramidSize.y) : 0;
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if (occlusionDebugOverlaySize < newDebugOverlaySize)
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{
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if (occlusionDebugOverlay != null)
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occlusionDebugOverlay.Release();
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occlusionDebugOverlaySize = newDebugOverlaySize;
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debugNeedsClear = true;
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// We use buffer instead of texture, because some platforms don't support atmoic operations for Texture2D<uint>
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occlusionDebugOverlay = new GraphicsBuffer(GraphicsBuffer.Target.Structured, GraphicsBuffer.UsageFlags.None,
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occlusionDebugOverlaySize + (int)OcclusionCullingCommonConfig.DebugPyramidOffset, sizeof(uint));
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}
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if (newDebugOverlaySize == 0)
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{
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if (occlusionDebugOverlay != null)
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{
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occlusionDebugOverlay.Release();
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occlusionDebugOverlay = null;
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}
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occlusionDebugOverlaySize = newDebugOverlaySize;
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}
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if (constantBuffer == null)
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constantBuffer = new ComputeBuffer(1, UnsafeUtility.SizeOf<OccluderDepthPyramidConstants>(), ComputeBufferType.Constant);
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if (!constantBufferData.IsCreated)
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constantBufferData = new NativeArray<OccluderDepthPyramidConstants>(1, Allocator.Persistent);
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}
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internal static void SetKeyword(ComputeCommandBuffer cmd, ComputeShader cs, in LocalKeyword keyword, bool value)
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{
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if (value)
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cmd.EnableKeyword(cs, keyword);
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else
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cmd.DisableKeyword(cs, keyword);
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}
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private OccluderDepthPyramidConstants SetupFarDepthPyramidConstants(ReadOnlySpan<OccluderSubviewUpdate> occluderSubviewUpdates, NativeArray<Plane> silhouettePlanes)
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{
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OccluderDepthPyramidConstants cb = new OccluderDepthPyramidConstants();
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// write globals
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cb._OccluderMipLayoutSizeX = (uint)occluderMipLayoutSize.x;
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cb._OccluderMipLayoutSizeY = (uint)occluderMipLayoutSize.y;
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// write per-subview data
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int updateCount = occluderSubviewUpdates.Length;
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for (int updateIndex = 0; updateIndex < updateCount; ++updateIndex)
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{
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ref readonly OccluderSubviewUpdate update = ref occluderSubviewUpdates[updateIndex];
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int subviewIndex = update.subviewIndex;
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subviewData[subviewIndex] = OccluderDerivedData.FromParameters(update);
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subviewValidMask |= 1 << update.subviewIndex;
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Matrix4x4 viewProjMatrix
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= update.gpuProjMatrix
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* update.viewMatrix
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* Matrix4x4.Translate(-update.viewOffsetWorldSpace);
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Matrix4x4 invViewProjMatrix = viewProjMatrix.inverse;
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unsafe
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{
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for (int j = 0; j < 16; ++j)
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cb._InvViewProjMatrix[16 * updateIndex + j] = invViewProjMatrix[j];
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cb._SrcOffset[4 * updateIndex + 0] = (uint)update.depthOffset.x;
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cb._SrcOffset[4 * updateIndex + 1] = (uint)update.depthOffset.y;
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cb._SrcOffset[4 * updateIndex + 2] = 0;
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cb._SrcOffset[4 * updateIndex + 3] = 0;
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}
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cb._SrcSliceIndices |= (((uint)update.depthSliceIndex & 0xf) << (4 * updateIndex));
|
||
|
|
cb._DstSubviewIndices |= ((uint)subviewIndex << (4 * updateIndex));
|
||
|
|
}
|
||
|
|
|
||
|
|
// TODO: transform these planes from world space into NDC space planes
|
||
|
|
for (int i = 0; i < k_MaxSilhouettePlanes; ++i)
|
||
|
|
{
|
||
|
|
Plane plane = new Plane(Vector3.zero, 0.0f);
|
||
|
|
if (i < silhouettePlanes.Length)
|
||
|
|
plane = silhouettePlanes[i];
|
||
|
|
unsafe
|
||
|
|
{
|
||
|
|
cb._SilhouettePlanes[4 * i + 0] = plane.normal.x;
|
||
|
|
cb._SilhouettePlanes[4 * i + 1] = plane.normal.y;
|
||
|
|
cb._SilhouettePlanes[4 * i + 2] = plane.normal.z;
|
||
|
|
cb._SilhouettePlanes[4 * i + 3] = plane.distance;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
cb._SilhouettePlaneCount = (uint)silhouettePlanes.Length;
|
||
|
|
|
||
|
|
return cb;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void CreateFarDepthPyramid(ComputeCommandBuffer cmd, in OccluderParameters occluderParams, ReadOnlySpan<OccluderSubviewUpdate> occluderSubviewUpdates, in OccluderHandles occluderHandles, NativeArray<Plane> silhouettePlanes, ComputeShader occluderDepthPyramidCS, int occluderDepthDownscaleKernel)
|
||
|
|
{
|
||
|
|
OccluderDepthPyramidConstants cb = SetupFarDepthPyramidConstants(occluderSubviewUpdates, silhouettePlanes);
|
||
|
|
|
||
|
|
var cs = occluderDepthPyramidCS;
|
||
|
|
int kernel = occluderDepthDownscaleKernel;
|
||
|
|
|
||
|
|
var srcKeyword = new LocalKeyword(cs, "USE_SRC");
|
||
|
|
var srcIsArrayKeyword = new LocalKeyword(cs, "SRC_IS_ARRAY");
|
||
|
|
var srcIsMsaaKeyword = new LocalKeyword(cs, "SRC_IS_MSAA");
|
||
|
|
|
||
|
|
bool srcIsArray = occluderParams.depthIsArray;
|
||
|
|
|
||
|
|
RTHandle depthTexture = (RTHandle)occluderParams.depthTexture;
|
||
|
|
bool srcIsMsaa = depthTexture?.isMSAAEnabled ?? false;
|
||
|
|
|
||
|
|
int mipCount = k_FirstDepthMipIndex + k_MaxOccluderMips;
|
||
|
|
for (int mipIndexBase = 0; mipIndexBase < mipCount - 1; mipIndexBase += 4)
|
||
|
|
{
|
||
|
|
cmd.SetComputeTextureParam(cs, kernel, ShaderIDs._DstDepth, occluderHandles.occluderDepthPyramid);
|
||
|
|
|
||
|
|
bool useSrc = (mipIndexBase == 0);
|
||
|
|
SetKeyword(cmd, cs, srcKeyword, useSrc);
|
||
|
|
SetKeyword(cmd, cs, srcIsArrayKeyword, useSrc && srcIsArray);
|
||
|
|
SetKeyword(cmd, cs, srcIsMsaaKeyword, useSrc && srcIsMsaa);
|
||
|
|
if (useSrc)
|
||
|
|
cmd.SetComputeTextureParam(cs, kernel, ShaderIDs._SrcDepth, occluderParams.depthTexture);
|
||
|
|
|
||
|
|
cb._MipCount = (uint)Math.Min(mipCount - 1 - mipIndexBase, 4);
|
||
|
|
|
||
|
|
Vector2Int srcSize = Vector2Int.zero;
|
||
|
|
for (int i = 0; i < 5; ++i)
|
||
|
|
{
|
||
|
|
Vector2Int offset = Vector2Int.zero;
|
||
|
|
Vector2Int size = Vector2Int.zero;
|
||
|
|
int mipIndex = mipIndexBase + i;
|
||
|
|
if (mipIndex == 0)
|
||
|
|
{
|
||
|
|
size = occluderParams.depthSize;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
int occMipIndex = mipIndex - k_FirstDepthMipIndex;
|
||
|
|
if (0 <= occMipIndex && occMipIndex < k_MaxOccluderMips)
|
||
|
|
{
|
||
|
|
offset = occluderMipBounds[occMipIndex].offset;
|
||
|
|
size = occluderMipBounds[occMipIndex].size;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (i == 0)
|
||
|
|
srcSize = size;
|
||
|
|
unsafe
|
||
|
|
{
|
||
|
|
cb._MipOffsetAndSize[4 * i + 0] = (uint)offset.x;
|
||
|
|
cb._MipOffsetAndSize[4 * i + 1] = (uint)offset.y;
|
||
|
|
cb._MipOffsetAndSize[4 * i + 2] = (uint)size.x;
|
||
|
|
cb._MipOffsetAndSize[4 * i + 3] = (uint)size.y;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
constantBufferData[0] = cb;
|
||
|
|
cmd.SetBufferData(constantBuffer, constantBufferData);
|
||
|
|
cmd.SetComputeConstantBufferParam(cs, ShaderIDs.OccluderDepthPyramidConstants, constantBuffer, 0, constantBuffer.stride);
|
||
|
|
|
||
|
|
cmd.DispatchCompute(cs, kernel, (srcSize.x + 15) / 16, (srcSize.y + 15) / 16, occluderSubviewUpdates.Length);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public OccluderHandles Import(RenderGraph renderGraph)
|
||
|
|
{
|
||
|
|
RenderTargetInfo rtInfo = new RenderTargetInfo
|
||
|
|
{
|
||
|
|
width = occluderDepthPyramidSize.x,
|
||
|
|
height = occluderDepthPyramidSize.y,
|
||
|
|
volumeDepth = 1,
|
||
|
|
msaaSamples = 1,
|
||
|
|
format = GraphicsFormat.R32_SFloat,
|
||
|
|
bindMS = false,
|
||
|
|
};
|
||
|
|
OccluderHandles occluderHandles = new OccluderHandles()
|
||
|
|
{
|
||
|
|
occluderDepthPyramid = renderGraph.ImportTexture(occluderDepthPyramid, rtInfo)
|
||
|
|
};
|
||
|
|
if (occlusionDebugOverlay != null)
|
||
|
|
occluderHandles.occlusionDebugOverlay = renderGraph.ImportBuffer(occlusionDebugOverlay);
|
||
|
|
return occluderHandles;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void PrepareOccluders(in OccluderParameters occluderParams)
|
||
|
|
{
|
||
|
|
if (subviewCount != occluderParams.subviewCount)
|
||
|
|
{
|
||
|
|
if (subviewData.IsCreated)
|
||
|
|
subviewData.Dispose();
|
||
|
|
|
||
|
|
subviewData = new NativeArray<OccluderDerivedData>(occluderParams.subviewCount, Allocator.Persistent);
|
||
|
|
subviewValidMask = 0;
|
||
|
|
}
|
||
|
|
depthBufferSize = occluderParams.depthSize;
|
||
|
|
|
||
|
|
// enable debug counters for cameras when the overlay is enabled
|
||
|
|
bool debugOverlayEnabled = GPUResidentDrawer.GetDebugStats()?.occlusionOverlayEnabled ?? false;
|
||
|
|
UpdateMipBounds();
|
||
|
|
AllocateTexturesIfNecessary(debugOverlayEnabled);
|
||
|
|
}
|
||
|
|
|
||
|
|
internal OcclusionCullingDebugOutput GetDebugOutput()
|
||
|
|
{
|
||
|
|
var debugOutput = new OcclusionCullingDebugOutput
|
||
|
|
{
|
||
|
|
occluderDepthPyramid = occluderDepthPyramid,
|
||
|
|
occlusionDebugOverlay = occlusionDebugOverlay,
|
||
|
|
};
|
||
|
|
|
||
|
|
debugOutput.cb._DepthSizeInOccluderPixels = depthBufferSizeInOccluderPixels;
|
||
|
|
debugOutput.cb._OccluderMipLayoutSizeX = (uint)occluderMipLayoutSize.x;
|
||
|
|
debugOutput.cb._OccluderMipLayoutSizeY = (uint)occluderMipLayoutSize.y;
|
||
|
|
for (int i = 0; i < occluderMipBounds.Length; ++i)
|
||
|
|
{
|
||
|
|
var mipBounds = occluderMipBounds[i];
|
||
|
|
unsafe
|
||
|
|
{
|
||
|
|
debugOutput.cb._OccluderMipBounds[4 * i + 0] = (uint)mipBounds.offset.x;
|
||
|
|
debugOutput.cb._OccluderMipBounds[4 * i + 1] = (uint)mipBounds.offset.y;
|
||
|
|
debugOutput.cb._OccluderMipBounds[4 * i + 2] = (uint)mipBounds.size.x;
|
||
|
|
debugOutput.cb._OccluderMipBounds[4 * i + 3] = (uint)mipBounds.size.y;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return debugOutput;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
internal enum IndirectAllocator
|
||
|
|
{
|
||
|
|
NextInstanceIndex,
|
||
|
|
NextDrawIndex,
|
||
|
|
Count // keep last
|
||
|
|
}
|
||
|
|
|
||
|
|
internal struct IndirectBufferLimits
|
||
|
|
{
|
||
|
|
public int maxInstanceCount;
|
||
|
|
public int maxDrawCount;
|
||
|
|
}
|
||
|
|
|
||
|
|
internal struct InstanceOcclusionTestSubviewSettings
|
||
|
|
{
|
||
|
|
public int testCount;
|
||
|
|
public int occluderSubviewIndices;
|
||
|
|
public int occluderSubviewMask;
|
||
|
|
public int cullingSplitIndices;
|
||
|
|
public int cullingSplitMask;
|
||
|
|
|
||
|
|
public static InstanceOcclusionTestSubviewSettings FromSpan(ReadOnlySpan<SubviewOcclusionTest> subviewOcclusionTests)
|
||
|
|
{
|
||
|
|
InstanceOcclusionTestSubviewSettings settings = new InstanceOcclusionTestSubviewSettings();
|
||
|
|
for (int testIndex = 0; testIndex < subviewOcclusionTests.Length; ++testIndex)
|
||
|
|
{
|
||
|
|
SubviewOcclusionTest subviewTest = subviewOcclusionTests[testIndex];
|
||
|
|
settings.occluderSubviewIndices |= subviewTest.occluderSubviewIndex << (4 * testIndex);
|
||
|
|
settings.occluderSubviewMask |= 1 << subviewTest.occluderSubviewIndex;
|
||
|
|
settings.cullingSplitIndices |= subviewTest.cullingSplitIndex << (4 * testIndex);
|
||
|
|
settings.cullingSplitMask |= 1 << subviewTest.cullingSplitIndex;
|
||
|
|
}
|
||
|
|
settings.testCount = subviewOcclusionTests.Length;
|
||
|
|
return settings;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
internal struct IndirectBufferContextHandles
|
||
|
|
{
|
||
|
|
public BufferHandle instanceBuffer;
|
||
|
|
public BufferHandle instanceInfoBuffer;
|
||
|
|
public BufferHandle argsBuffer;
|
||
|
|
public BufferHandle drawInfoBuffer;
|
||
|
|
|
||
|
|
public void UseForOcclusionTest(IBaseRenderGraphBuilder builder)
|
||
|
|
{
|
||
|
|
instanceBuffer = builder.UseBuffer(instanceBuffer, AccessFlags.ReadWrite);
|
||
|
|
instanceInfoBuffer = builder.UseBuffer(instanceInfoBuffer, AccessFlags.Read);
|
||
|
|
argsBuffer = builder.UseBuffer(argsBuffer, AccessFlags.ReadWrite);
|
||
|
|
drawInfoBuffer = builder.UseBuffer(drawInfoBuffer, AccessFlags.Read);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
internal struct IndirectBufferContextStorage : IDisposable
|
||
|
|
{
|
||
|
|
private const int kAllocatorCount = (int)IndirectAllocator.Count;
|
||
|
|
internal const int kExtraDrawAllocationCount = 1; // over-allocate by one for indirect args scratch space GPU-side
|
||
|
|
internal const int kInstanceInfoGpuOffsetMultiplier = 2; // GPU side allocates storage for extra copy of instance list
|
||
|
|
|
||
|
|
private IndirectBufferLimits m_BufferLimits;
|
||
|
|
|
||
|
|
private GraphicsBuffer m_InstanceBuffer;
|
||
|
|
private GraphicsBuffer m_InstanceInfoBuffer;
|
||
|
|
private NativeArray<IndirectInstanceInfo> m_InstanceInfoStaging;
|
||
|
|
|
||
|
|
private GraphicsBuffer m_ArgsBuffer;
|
||
|
|
private GraphicsBuffer m_DrawInfoBuffer;
|
||
|
|
private NativeArray<IndirectDrawInfo> m_DrawInfoStaging;
|
||
|
|
|
||
|
|
private int m_ContextAllocCounter;
|
||
|
|
private NativeHashMap<int, int> m_ContextIndexFromViewID;
|
||
|
|
private NativeList<IndirectBufferContext> m_Contexts;
|
||
|
|
private NativeArray<IndirectBufferAllocInfo> m_ContextAllocInfo;
|
||
|
|
private NativeArray<int> m_AllocationCounters;
|
||
|
|
|
||
|
|
public GraphicsBuffer instanceBuffer { get { return m_InstanceBuffer; } }
|
||
|
|
public GraphicsBuffer instanceInfoBuffer { get { return m_InstanceInfoBuffer; } }
|
||
|
|
public GraphicsBuffer argsBuffer { get { return m_ArgsBuffer; } }
|
||
|
|
public GraphicsBuffer drawInfoBuffer { get { return m_DrawInfoBuffer; } }
|
||
|
|
|
||
|
|
public GraphicsBufferHandle visibleInstanceBufferHandle { get { return m_InstanceBuffer.bufferHandle; } }
|
||
|
|
public GraphicsBufferHandle indirectArgsBufferHandle { get { return m_ArgsBuffer.bufferHandle; } }
|
||
|
|
|
||
|
|
public IndirectBufferContextHandles ImportBuffers(RenderGraph renderGraph)
|
||
|
|
{
|
||
|
|
return new IndirectBufferContextHandles()
|
||
|
|
{
|
||
|
|
instanceBuffer = renderGraph.ImportBuffer(m_InstanceBuffer),
|
||
|
|
instanceInfoBuffer = renderGraph.ImportBuffer(m_InstanceInfoBuffer),
|
||
|
|
argsBuffer = renderGraph.ImportBuffer(m_ArgsBuffer),
|
||
|
|
drawInfoBuffer = renderGraph.ImportBuffer(m_DrawInfoBuffer),
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
public NativeArray<IndirectInstanceInfo> instanceInfoGlobalArray { get { return m_InstanceInfoStaging; } }
|
||
|
|
public NativeArray<IndirectDrawInfo> drawInfoGlobalArray { get { return m_DrawInfoStaging; } }
|
||
|
|
public NativeArray<int> allocationCounters { get { return m_AllocationCounters; } }
|
||
|
|
|
||
|
|
public void Init()
|
||
|
|
{
|
||
|
|
int initialDrawCount = 256;
|
||
|
|
int initialInstanceCount = 64 * initialDrawCount;
|
||
|
|
int initialContextCount = 8;
|
||
|
|
|
||
|
|
AllocateInstanceBuffers(initialInstanceCount);
|
||
|
|
AllocateDrawBuffers(initialDrawCount);
|
||
|
|
|
||
|
|
m_ContextIndexFromViewID = new NativeHashMap<int, int>(initialContextCount, Allocator.Persistent);
|
||
|
|
m_Contexts = new NativeList<IndirectBufferContext>(initialContextCount, Allocator.Persistent);
|
||
|
|
m_ContextAllocInfo = new NativeArray<IndirectBufferAllocInfo>(initialContextCount, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
|
||
|
|
|
||
|
|
m_AllocationCounters = new NativeArray<int>(kAllocatorCount, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
|
||
|
|
|
||
|
|
ResetAllocators();
|
||
|
|
}
|
||
|
|
|
||
|
|
void AllocateInstanceBuffers(int maxInstanceCount)
|
||
|
|
{
|
||
|
|
m_InstanceBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Raw, maxInstanceCount, sizeof(int));
|
||
|
|
m_InstanceInfoBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured, kInstanceInfoGpuOffsetMultiplier * maxInstanceCount, System.Runtime.InteropServices.Marshal.SizeOf<IndirectInstanceInfo>());
|
||
|
|
m_InstanceInfoStaging = new NativeArray<IndirectInstanceInfo>(maxInstanceCount, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
|
||
|
|
m_BufferLimits.maxInstanceCount = maxInstanceCount;
|
||
|
|
}
|
||
|
|
|
||
|
|
void FreeInstanceBuffers()
|
||
|
|
{
|
||
|
|
m_InstanceBuffer.Release();
|
||
|
|
m_InstanceInfoBuffer.Release();
|
||
|
|
m_InstanceInfoStaging.Dispose();
|
||
|
|
m_BufferLimits.maxInstanceCount = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void AllocateDrawBuffers(int maxDrawCount)
|
||
|
|
{
|
||
|
|
m_ArgsBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured | GraphicsBuffer.Target.IndirectArguments, maxDrawCount * (GraphicsBuffer.IndirectDrawIndexedArgs.size / sizeof(int)), sizeof(int));
|
||
|
|
m_DrawInfoBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured, maxDrawCount, System.Runtime.InteropServices.Marshal.SizeOf<IndirectDrawInfo>());
|
||
|
|
m_DrawInfoStaging = new NativeArray<IndirectDrawInfo>(maxDrawCount, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
|
||
|
|
m_BufferLimits.maxDrawCount = maxDrawCount;
|
||
|
|
}
|
||
|
|
|
||
|
|
void FreeDrawBuffers()
|
||
|
|
{
|
||
|
|
m_ArgsBuffer.Release();
|
||
|
|
m_DrawInfoBuffer.Release();
|
||
|
|
m_DrawInfoStaging.Dispose();
|
||
|
|
m_BufferLimits.maxDrawCount = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void Dispose()
|
||
|
|
{
|
||
|
|
SyncContexts();
|
||
|
|
|
||
|
|
FreeInstanceBuffers();
|
||
|
|
FreeDrawBuffers();
|
||
|
|
|
||
|
|
m_ContextIndexFromViewID.Dispose();
|
||
|
|
m_Contexts.Dispose();
|
||
|
|
m_ContextAllocInfo.Dispose();
|
||
|
|
m_AllocationCounters.Dispose();
|
||
|
|
}
|
||
|
|
|
||
|
|
private void SyncContexts()
|
||
|
|
{
|
||
|
|
for (int contextIndex = 0; contextIndex < m_Contexts.Length; ++contextIndex)
|
||
|
|
m_Contexts[contextIndex].cullingJobHandle.Complete();
|
||
|
|
}
|
||
|
|
|
||
|
|
private void ResetAllocators()
|
||
|
|
{
|
||
|
|
m_ContextAllocCounter = 0;
|
||
|
|
m_ContextIndexFromViewID.Clear();
|
||
|
|
m_Contexts.Clear();
|
||
|
|
m_AllocationCounters.FillArray(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
private void GrowBuffers()
|
||
|
|
{
|
||
|
|
if (m_ContextAllocCounter > m_ContextAllocInfo.Length)
|
||
|
|
{
|
||
|
|
// allocate 20% more than the high water mark
|
||
|
|
int newContextCount = (m_ContextAllocCounter * 6) / 5;
|
||
|
|
m_Contexts.Clear();
|
||
|
|
m_Contexts.SetCapacity(newContextCount);
|
||
|
|
m_ContextAllocInfo.Dispose();
|
||
|
|
m_ContextAllocInfo = new NativeArray<IndirectBufferAllocInfo>(newContextCount, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
|
||
|
|
//Debug.Log("Raised indirect context count to " + newContextCount);
|
||
|
|
}
|
||
|
|
int instanceAllocCounter = m_AllocationCounters[(int)IndirectAllocator.NextInstanceIndex];
|
||
|
|
if (instanceAllocCounter > m_BufferLimits.maxInstanceCount)
|
||
|
|
{
|
||
|
|
// allocate 20% more than the high water mark
|
||
|
|
int newInstanceCount = (instanceAllocCounter * 6) / 5;
|
||
|
|
FreeInstanceBuffers();
|
||
|
|
AllocateInstanceBuffers(newInstanceCount);
|
||
|
|
//Debug.Log("Raised indirect instance count to " + newInstanceCount);
|
||
|
|
}
|
||
|
|
int drawAllocCounter = m_AllocationCounters[(int)IndirectAllocator.NextDrawIndex];
|
||
|
|
if (drawAllocCounter > m_BufferLimits.maxDrawCount)
|
||
|
|
{
|
||
|
|
// allocate 20% more than the high water mark
|
||
|
|
int newDrawCount = (drawAllocCounter * 6) / 5;
|
||
|
|
FreeDrawBuffers();
|
||
|
|
AllocateDrawBuffers(newDrawCount);
|
||
|
|
//Debug.Log("Raised indirect draw count to " + newDrawCount);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public void ClearContextsAndGrowBuffers()
|
||
|
|
{
|
||
|
|
SyncContexts();
|
||
|
|
GrowBuffers();
|
||
|
|
ResetAllocators();
|
||
|
|
}
|
||
|
|
|
||
|
|
public int TryAllocateContext(int viewID)
|
||
|
|
{
|
||
|
|
// Disallow using the same viewID multiple times for a frame, since it is used as a UID to update indirect args
|
||
|
|
// This will prevent multiple context being created for example if a custom pass is being used
|
||
|
|
if (m_ContextIndexFromViewID.ContainsKey(viewID))
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
int contextIndex = -1;
|
||
|
|
m_ContextAllocCounter += 1;
|
||
|
|
if (m_Contexts.Length < m_ContextAllocInfo.Length)
|
||
|
|
{
|
||
|
|
contextIndex = m_Contexts.Length;
|
||
|
|
m_Contexts.Add(new IndirectBufferContext());
|
||
|
|
m_ContextIndexFromViewID.Add(viewID, contextIndex);
|
||
|
|
}
|
||
|
|
return contextIndex;
|
||
|
|
}
|
||
|
|
|
||
|
|
public int TryGetContextIndex(int viewID)
|
||
|
|
{
|
||
|
|
if (!m_ContextIndexFromViewID.TryGetValue(viewID, out var contextIndex))
|
||
|
|
contextIndex = -1;
|
||
|
|
return contextIndex;
|
||
|
|
}
|
||
|
|
|
||
|
|
public NativeArray<IndirectBufferAllocInfo> GetAllocInfoSubArray(int contextIndex)
|
||
|
|
{
|
||
|
|
int safeIndex = Mathf.Max(contextIndex, 0);
|
||
|
|
return m_ContextAllocInfo.GetSubArray(safeIndex, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
public IndirectBufferAllocInfo GetAllocInfo(int contextIndex)
|
||
|
|
{
|
||
|
|
IndirectBufferAllocInfo allocInfo = new IndirectBufferAllocInfo();
|
||
|
|
if (0 <= contextIndex && contextIndex < m_Contexts.Length)
|
||
|
|
allocInfo = m_ContextAllocInfo[contextIndex];
|
||
|
|
return allocInfo;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void CopyFromStaging(CommandBuffer cmd, in IndirectBufferAllocInfo allocInfo)
|
||
|
|
{
|
||
|
|
if (!allocInfo.IsEmpty())
|
||
|
|
{
|
||
|
|
cmd.SetBufferData(
|
||
|
|
m_DrawInfoBuffer,
|
||
|
|
m_DrawInfoStaging,
|
||
|
|
allocInfo.drawAllocIndex,
|
||
|
|
allocInfo.drawAllocIndex,
|
||
|
|
allocInfo.drawCount);
|
||
|
|
|
||
|
|
cmd.SetBufferData(
|
||
|
|
m_InstanceInfoBuffer,
|
||
|
|
m_InstanceInfoStaging,
|
||
|
|
allocInfo.instanceAllocIndex,
|
||
|
|
kInstanceInfoGpuOffsetMultiplier * allocInfo.instanceAllocIndex,
|
||
|
|
allocInfo.instanceCount);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public IndirectBufferLimits GetLimits(int contextIndex)
|
||
|
|
{
|
||
|
|
IndirectBufferLimits limits = new IndirectBufferLimits();
|
||
|
|
if (contextIndex >= 0)
|
||
|
|
limits = m_BufferLimits;
|
||
|
|
return limits;
|
||
|
|
}
|
||
|
|
|
||
|
|
public IndirectBufferContext GetBufferContext(int contextIndex)
|
||
|
|
{
|
||
|
|
IndirectBufferContext ctx = new IndirectBufferContext();
|
||
|
|
if (0 <= contextIndex && contextIndex < m_Contexts.Length)
|
||
|
|
ctx = m_Contexts[contextIndex];
|
||
|
|
return ctx;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void SetBufferContext(int contextIndex, IndirectBufferContext ctx)
|
||
|
|
{
|
||
|
|
if (0 <= contextIndex && contextIndex < m_Contexts.Length)
|
||
|
|
m_Contexts[contextIndex] = ctx;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|