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  3. FAssetThumbnailPool

FAssetThumbnailPool

Utility class for keeping track of, rendering, and recycling thumbnails rendered in Slate

Unreal Engine C++ API Reference > Editor > UnrealEd

Inheritance Hierarchy

References

   
Module UnrealEd
Header /Engine/Source/Editor/UnrealEd/Public/AssetThumbnail.h
Include #include "AssetThumbnail.h"

Syntax

class FAssetThumbnailPool : public FTickableEditorObject

Remarks

Utility class for keeping track of, rendering, and recycling thumbnails rendered in Slate

Constructors

  Type Name Description
Public function  

FAssetThumbnailPool ( uint32 InNumInPool,
double InMaxFrameTimeAllowance,
uint32 InMaxRealTimeThumbnailsPerFrame
)

 Constructor

Destructors

  Type Name Description
Public function   Destructor to free all remaining resources

Functions

  Type Name Description
Public function FSlateTexture2DRHIRef *

AccessTexture ( const FAssetData& AssetData,
uint32 Width,
uint32 Height
)

 Accesses the texture for an object.
Public function void

AddReferencer ( const FAssetThumbnail& AssetThumbnail
)

 Adds a referencer to keep textures around as long as they are needed
Public function Const bool

IsInRenderStack ( const TSharedPtr< FAssetThumbnail >& Thumbnail
)

 Returns true if the thumbnail for the specified asset in the specified size is in the stack of thumbnails to render
Public function Const bool

IsRendered ( const TSharedPtr< FAssetThumbnail >& Thumbnail
)

 Returns true if the thumbnail for the specified asset in the specified size has been rendered
Public function FThumbnailRendered &  
Public function FThumbnailRenderFailed &  
Public function void

PrioritizeThumbnails ( const TArray< TSharedPtr< FAssetThumbnail > >& ThumbnailsToPrioritize,
uint32 Width,
uint32 Height
)

 Brings all items in ThumbnailsToPrioritize to the front of the render stack if they are actually in the stack
Public function void

RefreshThumbnail ( const TSharedPtr< FAssetThumbnail >& ThumbnailToRefresh
)

 Re-renders the specified thumbnail
Public function void

RemoveReferencer ( const FAssetThumbnail& AssetThumbnail
)

 Removes a referencer to clean up textures that are no longer needed
Public function void

SetRealTimeThumbnail ( const TSharedPtr< FAssetThumbnail >& Thumbnail,
bool bRealTimeThumbnail
)

 Enables/disables realtime thumbnail behavior

Overridden from FTickableObjectBase

  Type Name Description
Public function Virtual Const TStatId Return the stat id to use for this tickable
Public function Virtual Const bool Checks if any new thumbnails are queued
Public function Virtual void

Tick ( float DeltaTime
)

 Ticks the pool, rendering new thumbnails as needed

Classes

  Type Name Description
Public class FThumbnailRendered Register/Unregister a callback for when thumbnails are rendered  
Public class FThumbnailRenderFailed Register/Unregister a callback for when thumbnails fail to render  

Constants

Name Description
CustomThumbnailTagName  

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