//通过路径获取单张图片，转为Texture2D
UFUNCTION(BlueprintCallable, Category = "Image")
static UTexture2D* LoadTexture2D(const FString ImagePath);
//获取指定路径下的所以有图片的名称
UFUNCTION(BlueprintCallable, Category = "Image")
static TArray GetFolderFiles(FString ImagePath);
//将指定路径下的所有图片转为Texture2D
UFUNCTION(BlueprintCallable, Category = "Image")
static TArray GetAllImageFromFiles(FString ImagePath);
//判断图片类型
static TSharedPtrGetImageWrapperByExtention(const FString ImagePath);
UTexture2D* ULoadImageToTexture::LoadTexture2D(const FString ImagePath)
{
UTexture2D* Texture = nullptr;
if (!FPlatformFileManager::Get().GetPlatformFile().FileExists(*ImagePath))
{
return nullptr;
}
TArray RawFileData;
if (!FFileHelper::LoadFileToArray(RawFileData, *ImagePath))
{
return nullptr;
}
TSharedPtr ImageWrapper = GetImageWrapperByExtention(ImagePath);
if (ImageWrapper.IsValid() && ImageWrapper->SetCompressed(RawFileData.GetData(), RawFileData.Num()))
{
TArray UncompressedRGBBA;
if (ImageWrapper->GetRaw(ERGBFormat::RGBA, 8, UncompressedRGBBA))
{
Texture = UTexture2D::CreateTransient(ImageWrapper->GetWidth(), ImageWrapper->GetHeight(), PF_R8G8B8A8);
if (Texture != nullptr)
{
void* TextureData = Texture->PlatformData->Mips[0].BulkData.Lock(LOCK_READ_WRITE);
FMemory::Memcpy(TextureData, UncompressedRGBBA.GetData(), UncompressedRGBBA.Num());
Texture->PlatformData->Mips[0].BulkData.Unlock();
Texture->UpdateResource();
}
}
}
return Texture;
}
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TArray ULoadImageToTexture::GetFolderFiles(FString ImagePath)
{
TArrayfiles;
FPaths::NormalizeDirectoryName(ImagePath);
IFileManager& FileManager = IFileManager::Get();
FString FinalPath = ImagePath / TEXT("*");
FileManager.FindFiles(files, *FinalPath, true, true);
return files;
}
===============================================================================
TArray ULoadImageToTexture::GetAllImageFromFiles(FString ImagePath)
{
TArray ImgPath = GetFolderFiles(ImagePath);
TArrayTexture2DArr;
for (auto path : ImgPath)
{
UTexture2D* Texture2D = LoadTexture2D(ImagePath + "/" + path);
Texture2DArr.Add(Texture2D);
}
return Texture2DArr;
}
===============================================================================
TSharedPtr ULoadImageToTexture::GetImageWrapperByExtention(const FString ImagePath)
{
IImageWrapperModule& module = FModuleManager::LoadModuleChecked(FName("ImageWrapper"));
if (ImagePath.EndsWith(".png"))
{
return module.CreateImageWrapper(EImageFormat::PNG);
}
if (ImagePath.EndsWith(".jpg") || ImagePath.EndsWith("jpeg"))
{
return module.CreateImageWrapper(EImageFormat::JPEG);
}
return nullptr;
}