MetalVertexDeclaration.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    MetalVertexDeclaration.h: Metal RHI Vertex Declaration.
=============================================================================*/
 
#pragma once
 
#include "MetalHashedVertexDescriptor.h"
#include "MetalRHIPrivate.h"
#include "RHI.h"
#include "RHIResources.h"
 
//------------------------------------------------------------------------------
 
#pragma mark - Metal Vertex Declaration Class
 
 
class FMetalVertexDeclaration : public FRHIVertexDeclaration
{
public:
    FMetalVertexDeclaration(const FVertexDeclarationElementList& InElements);
    ~FMetalVertexDeclaration();
 
#if METAL_USE_METAL_SHADER_CONVERTER
    IRVersionedInputLayoutDescriptor InputDescriptor;
    TStaticArray<uint32, MaxVertexElementCount> InputDescriptorBufferStrides;
#endif
    FVertexDeclarationElementList Elements;
 
    FMetalHashedVertexDescriptor Layout;
 
    uint32 BaseHash;
 
    virtual bool GetInitializer(FVertexDeclarationElementList& Init) override final;
    virtual uint32 GetPrecachePSOHash() const override final { return BaseHash; }
 
protected:
    void GenerateLayout(const FVertexDeclarationElementList& Elements);
};