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55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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/**
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* Interface for data deriving backends
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* This API will not be called concurrently, except that Build might be called on different instances if IsBuildThreadsafe.
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**/
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class FDerivedDataPluginInterface
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{
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public:
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virtual ~FDerivedDataPluginInterface()
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{
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}
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/**
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* Get the plugin name, this is used as the first part of the cache key
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* @return Name of the plugin
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**/
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virtual const TCHAR* GetPluginName() const = 0;
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/**
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* Get the version of the plugin, this is used as part of the cache key. This is supposed to
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* be a guid string ( ex. "69C8C8A6-A9F8-4EFC-875C-CFBB72E66486" )
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* @return Version string of the plugin
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**/
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virtual const TCHAR* GetVersionString() const = 0;
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/**
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* Returns the largest and plugin specific part of the cache key. This must be a alphanumeric+underscore
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* @return Version number of the plugin, for licensees.
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**/
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virtual FString GetPluginSpecificCacheKeySuffix() const = 0;
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/**
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* Indicates that this plugin is threadsafe. Note, the system itself will not call it concurrently if this false, however, then you are responsible for not calling the system itself concurrently.
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* @return true if this plugin is threadsafe
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**/
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virtual bool IsBuildThreadsafe() const = 0;
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/** Indicated that this plugin generates deterministic data. This is used for DDC verification */
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virtual bool IsDeterministic() const { return false; }
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/** Indicated that this plugin generates deterministic data. This is used for DDC verification */
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virtual FString GetDebugContextString() const { return TEXT("Unknown Context"); }
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/**
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* Does the work of deriving the data.
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* @param OutData Array of bytes to fill in with the result data
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* @return true if successful, in the event of failure the cache is not updated and failure is propagated to the original caller.
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**/
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virtual bool Build(TArray<uint8>& OutData) = 0;
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};
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