強烈建議先看下這篇保存圖片的方法：

https://blog.csdn.net/u011407338/article/details/104184087

主要設置如下：

創建組件和設置組件：

TextureTarget的來源和設置：

創建藍圖庫：

.h 文件

#pragma once

#include “ImageUtils.h”

#include “CoreMinimal.h”

#include “Kismet/BlueprintFunctionLibrary.h”

#include “MyBlueprintFunctionLibrary.generated.h”

/**

*

*/

UCLASS()

class UAV_API UMyBlueprintFunctionLibrary : public UBlueprintFunctionLibrary

{

GENERATED_BODY()

//保存UTextureRenderTarget2D到本地文件

UFUNCTION(BlueprintCallable, meta = (DisplayName = "SaveRenderTargetToFile", Keywords = "SaveRenderTargetToFile"), Category = "SaveToFile")

static bool SaveRenderTargetToFile(UTextureRenderTarget2D* rt, const FString& fileDestination);

};

.cpp 文件

#pragma once

#include “MyBlueprintFunctionLibrary.h”

#include “Engine/TextureRenderTarget2D.h”

#include “Misc/FileHelper.h”

bool UMyBlueprintFunctionLibrary::SaveRenderTargetToFile(UTextureRenderTarget2D* rt, const FString& fileDestination)

{

FTextureRenderTargetResource* rtResource = rt->GameThread_GetRenderTargetResource();

FReadSurfaceDataFlags readPixelFlags(RCM_UNorm);

TArray outBMP;

for (FColor& color : outBMP)

{

color.A = 255;

}

outBMP.AddUninitialized(rt->GetSurfaceWidth() * rt->GetSurfaceHeight());

rtResource->ReadPixels(outBMP, readPixelFlags);

FIntPoint destSize(rt->GetSurfaceWidth(), rt->GetSurfaceHeight());

TArray CompressedBitmap;

FImageUtils::CompressImageArray(destSize.X, destSize.Y, outBMP, CompressedBitmap);

bool imageSavedOk = FFileHelper::SaveArrayToFile(CompressedBitmap, *fileDestination);

return imageSavedOk;

}

編譯完成后測試一下：

效果：

總結

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