VertexStreamComponent.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "RHIDefinitions.h"
#include "Containers/EnumAsByte.h"
 
class FVertexBuffer;
 
enum class EVertexStreamUsage : uint8
{
    Default = 0 << 0,
    Instancing = 1 << 0,
    Overridden = 1 << 1,
    ManualFetch = 1 << 2
};
 
struct FVertexStreamComponent
{
    const FVertexBuffer* VertexBuffer = nullptr;
 
    uint32 StreamOffset = 0;
 
    uint8 Offset = 0;
 
    uint8 Stride = 0;
 
    TEnumAsByte<EVertexElementType> Type = VET_None;
 
    EVertexStreamUsage VertexStreamUsage = EVertexStreamUsage::Default;
 
    FVertexStreamComponent()
    {}
 
    FVertexStreamComponent(const FVertexBuffer* InVertexBuffer, uint32 InOffset, uint32 InStride, EVertexElementType InType, EVertexStreamUsage Usage = EVertexStreamUsage::Default) :
        VertexBuffer(InVertexBuffer),
        StreamOffset(0),
        Offset((uint8)InOffset),
        Stride((uint8)InStride),
        Type(InType),
        VertexStreamUsage(Usage)
    {
        check(InStride <= 0xFF);
        check(InOffset <= 0xFF);
    }
 
    FVertexStreamComponent(const FVertexBuffer* InVertexBuffer, uint32 InStreamOffset, uint32 InOffset, uint32 InStride, EVertexElementType InType, EVertexStreamUsage Usage = EVertexStreamUsage::Default) :
        VertexBuffer(InVertexBuffer),
        StreamOffset(InStreamOffset),
        Offset((uint8)InOffset),
        Stride((uint8)InStride),
        Type(InType),
        VertexStreamUsage(Usage)
    {
        check(InStride <= 0xFF);
        check(InOffset <= 0xFF);
    }
};