PrimitiveSceneShaderData.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "SceneDefinitions.h"
#include "Containers/StaticArray.h"
#include "InstanceUniformShaderParameters.h"
#include "LightmapUniformShaderParameters.h"
#include "PrimitiveUniformShaderParameters.h"
 
class FPrimitiveSceneProxy;
 
struct FPrimitiveSceneShaderData
{
    static const uint32 DataStrideInFloat4s = PRIMITIVE_SCENE_DATA_STRIDE;
 
    TStaticArray<FVector4f, DataStrideInFloat4s> Data;
 
    FPrimitiveSceneShaderData()
        : Data(InPlace, NoInit)
    {
        Setup(GetIdentityPrimitiveParameters());
    }
 
    explicit FPrimitiveSceneShaderData(const FPrimitiveUniformShaderParameters& PrimitiveUniformShaderParameters)
        : Data(InPlace, NoInit)
    {
        Setup(PrimitiveUniformShaderParameters);
    }
 
    ENGINE_API FPrimitiveSceneShaderData(const FPrimitiveSceneProxy* RESTRICT Proxy);
 
    ENGINE_API static void BuildDataFromProxy(const FPrimitiveSceneProxy* RESTRICT Proxy, FVector4f* RESTRICT OutData);
 
    ENGINE_API static void Setup(const FPrimitiveUniformShaderParameters& PrimitiveUniformShaderParameters, FVector4f* RESTRICT OutData);
 
    ENGINE_API void Setup(const FPrimitiveUniformShaderParameters& PrimitiveUniformShaderParameters);
};
 
class FSinglePrimitiveStructured : public FRenderResource
{
public:
    FSinglePrimitiveStructured()
    {}
 
    ENGINE_API virtual void InitRHI(FRHICommandListBase& RHICmdList) override;
 
    virtual void ReleaseRHI() override
    {
        SkyIrradianceEnvironmentMapRHI.SafeRelease();
        SkyIrradianceEnvironmentMapSRV.SafeRelease();
        PrimitiveSceneDataTextureRHI.SafeRelease();
        PrimitiveSceneDataTextureSRV.SafeRelease();
    }
 
    ENGINE_API void UploadToGPU(FRHICommandListBase& RHICmdList);
 
    EShaderPlatform ShaderPlatform=SP_NumPlatforms;
 
    FBufferRHIRef SkyIrradianceEnvironmentMapRHI;
    FShaderResourceViewRHIRef SkyIrradianceEnvironmentMapSRV;
 
    FTextureRHIRef PrimitiveSceneDataTextureRHI;
    FShaderResourceViewRHIRef PrimitiveSceneDataTextureSRV;
};
 
extern ENGINE_API TGlobalResource<FSinglePrimitiveStructured> GIdentityPrimitiveBuffer;