UE4中实现截图功能并保存到指定路径_ue如何修改截图保存路径

为方便起见，都是用全局函数和变量，而不是在类中实现

代码如下：

FDelegateHandle GCaptureHandle;
static void OnCaptureScreenshotComplete(int32 InWidth, int32 InHeight, const TArray<FColor>& InColors)
{
	FString ScreenShotName = FPaths::GameSavedDir() + TEXT("ScreenShot.png");
	TArray<uint8> CompressedBitmap;
	FImageUtils::CompressImageArray(InWidth, InHeight, InColors, CompressedBitmap);
	FFileHelper::SaveArrayToFile(CompressedBitmap, *ScreenShotName);
	UGameViewportClient::OnScreenshotCaptured().Remove(GCaptureHandle);
}
 
void CaptureScreenshot()
{
	if (GEngine && GEngine->GameViewport)
	{
		GCaptureHandle = UGameViewportClient::OnScreenshotCaptured().AddStatic(&OnCaptureScreenshotComplete);
		GEngine->GameViewport->Exec(nullptr, TEXT("HighResShot 1080x720"), *GLog);//分辨率可自己设定
	}
}

图片保存为png格式，如果想保存为jpg格式，可改为如下代码：

 
static void OnCaptureScreenshotComplete(int32 InWidth, int32 InHeight, const TArray<FColor>& InColors)
{
	FString ScreenShotName = FPaths::GameSavedDir() + TEXT("ScreenShot.jpg");
	IImageWrapperModule& ImageWrapperModule = FModuleManager::Get().LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper"));
	IImageWrapperPtr ImageWrapper = ImageWrapperModule.CreateImageWrapper(EImageFormat::JPEG);
	if (ImageWrapper->SetRaw(InColors.GetData(), InColors.Num()* sizeof(FColor), InWidth, InHeight, ERGBFormat::BGRA, 8))
	{
		int32 Quality = 100;//压缩质量0~100
		FFileHelper::SaveArrayToFile(ImageWrapper->GetCompressed(Quality), *ScreenShotName);
	}
	UGameViewportClient::OnScreenshotCaptured().Remove(GCaptureHandle);
}

XXX.build.cs文件需要包含"ImageWrapper"模块

PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "HeadMountedDisplay", "ImageWrapper" });

头文件包含

#include"IImageWrapperModule.h"
#include"ModuleManager.h"
#include"IImageWrapper.h"
#include"ImageUtils.h"