SceneViewStateSystemMemory.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Map.h"
#include "RHIResources.h"
 
class FRHIGPUTextureReadback;
struct IPooledRenderTarget;
 
struct FSceneViewStateSystemMemoryTexture
{
    FRHITextureDesc Desc;
    const TCHAR* DebugName;
    TUniquePtr<FRHIGPUTextureReadback> Readback;
    TMap<int32, TArray<uint8>> Instances;
};
 
// Context to handle mirroring of scene view state textures and buffers to system memory.  Provides a mechanism for very high
// resolution tiled rendering, beyond what can fit in GPU memory.
struct FSceneViewStateSystemMemoryMirror
{
    // Key is an offset in the FSceneView structure for the texture reference being mirrored.  Value is an array of 
    // unique texture descriptions, and readback and storage for instances of those textures per view key.  Assumption
    // is that with tiled rendering, all the tiles have the same resolution, and a single readback buffer can be shared
    // for all of them.
    TMap<int64, TArray<FSceneViewStateSystemMemoryTexture>> TextureMirrors;
 
    // Transient used internally
    TArray<TRefCountPtr<IPooledRenderTarget>> TemporaryTextures;
};