103 lines
3 KiB
C
103 lines
3 KiB
C
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// Copyright 2020 Phyronnaz
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#pragma once
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#include "CoreMinimal.h"
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#include "VoxelMinimal.h"
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#include "ShaderParameterMacros.h"
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#include "RenderCommandFence.h"
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#include "GlobalShader.h"
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BEGIN_GLOBAL_SHADER_PARAMETER_STRUCT(FVoxelDistanceFieldParameters,)
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SHADER_PARAMETER(uint32, SizeX)
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SHADER_PARAMETER(uint32, SizeY)
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SHADER_PARAMETER(uint32, SizeZ)
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SHADER_PARAMETER(uint32, Step)
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END_GLOBAL_SHADER_PARAMETER_STRUCT()
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#define VOXEL_DISTANCE_FIELD_NUM_THREADS_CS 8
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typedef TUniformBufferRef<FVoxelDistanceFieldParameters> FVoxelDistanceFieldParametersRef;
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class FVoxelDistanceFieldBaseCS : public FGlobalShader
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{
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DECLARE_TYPE_LAYOUT(FVoxelDistanceFieldBaseCS, NonVirtual);
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public:
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FVoxelDistanceFieldBaseCS() = default;
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FVoxelDistanceFieldBaseCS(const ShaderMetaType::CompiledShaderInitializerType& Initializer);
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static bool ShouldCache(EShaderPlatform Platform)
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{
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return IsFeatureLevelSupported(Platform, ERHIFeatureLevel::SM5);
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}
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static bool ShouldCompilePermutation(const FGlobalShaderPermutationParameters& Parameters)
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{
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return IsFeatureLevelSupported(Parameters.Platform, ERHIFeatureLevel::SM5);
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}
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static void ModifyCompilationEnvironment(const FGlobalShaderPermutationParameters& Parameters, FShaderCompilerEnvironment& OutEnvironment);
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void SetBuffers(
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FRHICommandList& RHICmdList,
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const FRWBuffer& SrcBuffer,
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const FRWBuffer& DstBuffer) const;
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void SetUniformBuffers(
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FRHICommandList& RHICmdList,
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const FVoxelDistanceFieldParameters& Parameters) const;
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private:
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LAYOUT_FIELD(FRWShaderParameter, Src);
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LAYOUT_FIELD(FRWShaderParameter, Dst);
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};
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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class FVoxelJumpFloodCS : public FVoxelDistanceFieldBaseCS
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{
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public:
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DECLARE_SHADER_TYPE(FVoxelJumpFloodCS, Global);
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using FVoxelDistanceFieldBaseCS::FVoxelDistanceFieldBaseCS;
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};
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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class VOXEL_API FVoxelDistanceFieldShaderHelper : public TVoxelSharedFromThis<FVoxelDistanceFieldShaderHelper>
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{
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public:
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FVoxelDistanceFieldShaderHelper() = default;
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void WaitForCompletion() const;
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void StartCompute(
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const FIntVector& Size,
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const TVoxelSharedRef<TArray<FVector3f>>& InOutData,
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int32 MaxPasses_Debug = -1);
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void Compute_RenderThread(
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FRHICommandListImmediate& RHICmdList,
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const FIntVector& Size,
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FVector3f* RESTRICT Data,
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int32 Num,
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int32 MaxPasses_Debug = -1);
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private:
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FIntVector AllocatedSize = FIntVector::ZeroValue;
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FRWBuffer SrcBuffer;
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FRWBuffer DstBuffer;
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FRenderCommandFence Fence;
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template<typename T>
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void ApplyComputeShader(
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FRHICommandListImmediate& RHICmdList,
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const FIntVector& Size,
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int32 Step);
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};
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