__Desc

__Time__: 2024-06-05 16:30
__Author__: Yblackd
__Desc__: UE5.2 加载本地图片 转 UTexture2D, 给材质 和 UMG 使用

使用方式

1. 新建继承BlueprintFunctionLibrary c++ 类
2. 复制下面源码，修改类名
3. 实测加载 jpg,jpeg, png 都可以; 其他未测试

源码

// .h
UFUNCTION(BlueprintCallable, Category = "UtilityBPLibrary | Texture")
static bool LoadImageToTexture(const FString& ImgPath, UTexture2D*& Texture2D);

// .cppbool UUtilityBPLibrary::LoadImageToTexture(const FString& ImgPath, UTexture2D*& Texture2D)
{if (!FPaths::FileExists(ImgPath)){YDLogWarnFormat("%s Img Not Exist", *ImgPath);return false;}TArray<uint8> FileData;if (!FFileHelper::LoadFileToArray(FileData, *ImgPath)){YDLogWarnFormat("%s Img Loading Failed ", *ImgPath);return false;}// 使用图像包装器模块 创建 图像包装器IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper"));EImageFormat ImageFormat = ImageWrapperModule.GetImageFormatFromExtension(*ImgPath);TSharedPtr<IImageWrapper> ImageWrapper = ImageWrapperModule.CreateImageWrapper(ImageFormat);if (!ImageWrapper.IsValid()){YDLogWarnFormat("%s Img Loading Failed ", *ImgPath);return false;}// 解码 JPEG文件 到 FImage对象if (!ImageWrapper->SetCompressed(FileData.GetData(), FileData.Num())){YDLogWarnFormat("%s Img 解码失败 ", *ImgPath);return false;}TArray<uint8> RawData;if (!ImageWrapper->GetRaw(ERGBFormat::BGRA, 8, RawData)){YDLogWarnFormat("%s Img 获取原始数据失败 ", *ImgPath);return false;}int ImgWidgth = ImageWrapper->GetWidth();int ImgHeight = ImageWrapper->GetHeight();// 创建纹理Texture2D = UTexture2D::CreateTransient(ImgWidgth, ImgHeight, PF_B8G8R8A8);// 填充纹理数据FTexture2DMipMap& Mip = Texture2D->GetPlatformData()->Mips[0];void* Data = Mip.BulkData.Lock(LOCK_READ_WRITE);FMemory::Memcpy(Data, RawData.GetData(), RawData.Num());Mip.BulkData.Unlock();// 设置纹理参数Texture2D->UpdateResource();return true;
}