UThumbnailRenderer | Unreal Engine 5.7 Documentation

API > API/Editor > API/Editor/UnrealEd

This is an abstract base class that is used to define the interface that UnrealEd will use when rendering a given object's thumbnail. The editor only calls the virtual rendering function.


Name	UThumbnailRenderer
Type	class
Header File	/Engine/Source/Editor/UnrealEd/Classes/ThumbnailRendering/ThumbnailRenderer.h
Include Path	#include "ThumbnailRendering/ThumbnailRenderer.h"

Syntax

UCLASS (Abstract, MinimalAPI)  
class UThumbnailRenderer : public UObject

Inheritance Hierarchy

UObjectBase → UObjectBaseUtility → UObject → UThumbnailRenderer

Derived Classes

UThumbnailRenderer derived class hierarchy

Constructors

Name	Remarks	Include Path	Unreal Specifiers
UThumbnailRenderer ( const FObjectInitializer& ObjectInitializer )		ThumbnailRendering/ThumbnailRenderer.h

Functions

Public

Name	Remarks	Include Path
virtual bool AllowsRealtimeThumbnails ( UObject* Object ) const	Checks to see if the specified asset supports realtime thumbnails, which will cause them to always be rerendered to reflect any changes made to the asset.	ThumbnailRendering/ThumbnailRenderer.h
virtual bool CanVisualizeAsset ( UObject* Object )	Returns true if the renderer is capable of producing a thumbnail for the specified asset.	ThumbnailRendering/ThumbnailRenderer.h
virtual void Draw ( UObject* Object, int32 X, int32 Y, uint32 Width, uint32 Height, FRenderTarget* Viewport, FCanvas* Canvas )	Draws a thumbnail for the object that was specified.	ThumbnailRendering/ThumbnailRenderer.h
virtual void Draw ( UObject* Object, int32 X, int32 Y, uint32 Width, uint32 Height, FRenderTarget* Viewport, FCanvas* Canvas, bool bAdditionalViewFamily )	Draws a thumbnail for the object that was specified.	ThumbnailRendering/ThumbnailRenderer.h
virtual EThumbnailRenderFrequency GetThumbnailRenderFrequency ( UObject* Object ) const	Override this method to control the render frequency for thumbnails in your editor Generally speaking you should use Realtime if you want an animated thumbnail, but if not it is expensive to use (per-frame draws) If not using realtime, the next best default is OnAssetSave, which updates the thumbnail only save.	ThumbnailRendering/ThumbnailRenderer.h
virtual void GetThumbnailSize ( UObject* Object, float Zoom, uint32& OutWidth, uint32& OutHeight ) const	Calculates the size the thumbnail would be at the specified zoom level	ThumbnailRendering/ThumbnailRenderer.h

Static

Name	Remarks	Include Path
static FGameTime GetTime()		ThumbnailRendering/ThumbnailRenderer.h
static void RenderViewFamily ( FCanvas* Canvas, FSceneViewFamily* ViewFamily )		ThumbnailRendering/ThumbnailRenderer.h
static void RenderViewFamily ( FCanvas* Canvas, FSceneViewFamily* ViewFamily, FSceneView* View )	Renders the thumbnail's view family.	ThumbnailRendering/ThumbnailRenderer.h

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