MeshPaintVirtualTexture.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Engine/Texture2D.h"
#include "RHIFwd.h"
 
#include "MeshPaintVirtualTexture.generated.h"
 
UCLASS(ClassGroup = Rendering, hidecategories = Texture, hidecategories = Compression, hidecategories = Adjustments, hidecategories = Compositing, MinimalAPI)
class UMeshPaintVirtualTexture : public UTexture2D
{
    GENERATED_UCLASS_BODY()
 
    
    UPROPERTY()
    TWeakObjectPtr<UPrimitiveComponent> OwningComponent;
 
    //~ Begin UTexture Interface.
    virtual void GetVirtualTextureBuildSettings(FVirtualTextureBuildSettings& OutSettings) const override;
    virtual void UpdateResourceWithParams(EUpdateResourceFlags InFlags) override;
    virtual bool IsVirtualTexturedWithSinglePhysicalPool() const override { return true; }
 
#if WITH_EDITOR
    virtual void BeginCacheForCookedPlatformData(const ITargetPlatform* TargetPlatform) override;
    virtual bool IsCachedCookedPlatformDataLoaded(const ITargetPlatform* TargetPlatform) override;
    virtual void ClearCachedCookedPlatformData(const ITargetPlatform* TargetPlatform) override;
#endif
    //~ End UTexture Interface.
};
 
namespace MeshPaintVirtualTexture
{
    ENGINE_API bool IsSupported(EShaderPlatform InShaderPlatform);
    ENGINE_API bool IsSupported(ITargetPlatform const* InTargetPlatform);
 
    inline uint32 GetDefaultFallbackColor() { return 0xFFFFFFFF; }
 
    ENGINE_API uint32 GetAlignedTextureSize(int32 InSize);
    ENGINE_API uint32 GetDefaultTextureSize(int32 InNumVertices);
 
    FUintVector2 GetTextureDescriptor(FTextureResource* InTextureResource, uint32 InOptionalCoordinateIndex = 0);
 
    struct FUniformParams
    {
        FTextureRHIRef PageTableTexture;
        FTextureRHIRef PhysicalTexture;
        FUintVector4 PackedUniform = FUintVector4(GetDefaultFallbackColor(), 0, 0, 0);
    };
    
    ENGINE_API FUniformParams GetUniformParams();
}