TextureFallbacks.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "GlobalRenderResources.h"
 
inline FRHITexture* OrWhite2DIfNull(FRHITexture* Tex)
{
    FRHITexture* Result = Tex ? Tex : GWhiteTexture->TextureRHI.GetReference();
    check(Result);
    return Result;
}
 
inline FRHITexture* OrBlack2DIfNull(FRHITexture* Tex)
{
    FRHITexture* Result = Tex ? Tex : GBlackTexture->TextureRHI.GetReference();
    check(Result);
    return Result;
}
 
inline FRHITexture* OrBlack2DArrayIfNull(FRHITexture* Tex)
{
    FRHITexture* Result = Tex ? Tex : GBlackArrayTexture->TextureRHI.GetReference();
    check(Result);
    return Result;
}
 
inline FRHITexture* OrBlack3DIfNull(FRHITexture* Tex)
{
    // we fall back to 2D which are unbound mobile parameters
    return OrBlack2DIfNull(Tex ? Tex : GBlackVolumeTexture->TextureRHI.GetReference());
}
 
inline FRHITexture* OrBlack3DAlpha1IfNull(FRHITexture* Tex)
{
    // we fall back to 2D which are unbound mobile parameters
    return OrBlack2DIfNull(Tex ? Tex : GBlackAlpha1VolumeTexture->TextureRHI.GetReference());
}
 
inline FRHITexture* OrBlack3DUintIfNull(FRHITexture* Tex)
{
    // we fall back to 2D which are unbound mobile parameters
    return OrBlack2DIfNull(Tex ? Tex : GBlackUintVolumeTexture->TextureRHI.GetReference());
}
 
inline void SetBlack2DIfNull(FRHITexture*& Tex)
{
    if (!Tex)
    {
        Tex = GBlackTexture->TextureRHI.GetReference();
        check(Tex);
    }
}
 
inline void SetBlack3DIfNull(FRHITexture*& Tex)
{
    if (!Tex)
    {
        Tex = GBlackVolumeTexture->TextureRHI.GetReference();
        // we fall back to 2D which are unbound mobile parameters
        SetBlack2DIfNull(Tex);
    }
}
 
inline void SetBlackAlpha13DIfNull(FRHITexture*& Tex)
{
    if (!Tex)
    {
        Tex = GBlackAlpha1VolumeTexture->TextureRHI.GetReference();
        // we fall back to 2D which are unbound mobile parameters
        SetBlack2DIfNull(Tex); // This is actually a rgb=0, a=1 texture
    }
}