动态创建Texture2D

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直接贴代码

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UTexture2D* ULibNextBridge::CreateTexture2dAsset_ByPixels(FString TextureName, FString Path, const TArray<FColor>& FillPixels,
	int32 Width, int32 Height, EPixelFormat PixelFormat, bool sRGB)
{
	TArray<FColor> Pixels = FillPixels;
	//创建非重复的名字
	FString UniquePackageName;
	FString UniqueAssetName;
	FAssetToolsModule& AssetToolsModule = FModuleManager::Get().LoadModuleChecked<FAssetToolsModule>("AssetTools");
	AssetToolsModule.Get().CreateUniqueAssetName(Path + TextureName, TEXT(""), UniquePackageName, UniqueAssetName);
	//创建包
	UPackage* Package = CreatePackage( *UniquePackageName);
	Package->FullyLoad();
	//创建贴图资源
	UTexture2D* res = NewObject<UTexture2D>(Package, *UniqueAssetName, RF_Public | RF_Standalone | RF_MarkAsRootSet);
	res->AddToRoot();
	res->SRGB = sRGB;
	res->MipGenSettings = TMGS_NoMipmaps;
	//创建PlatformData数据
	FTexturePlatformData* PlatformData = new FTexturePlatformData();
	PlatformData->SizeX = Width;
	PlatformData->SizeY = Height;
	PlatformData->PixelFormat = PixelFormat;
	res->SetPlatformData(PlatformData);
	res->UpdateResource();
	FTexture2DMipMap* Mip = new FTexture2DMipMap();
	res->GetPlatformData()->Mips.Add(Mip);
	Mip->SizeX = Width;
	Mip->SizeY = Height;
 	//写入像素数据
	Mip->BulkData.Lock(LOCK_READ_WRITE);
	uint8* TextureData = static_cast<uint8*>(Mip->BulkData.Realloc(Width * Height * sizeof(FColor)));
	FMemory::Memcpy(TextureData, Pixels.GetData(), Width * Height * sizeof(FColor));
	Mip->BulkData.Unlock();

	res->UpdateResource();
 	//初始化source数据
	res->Source.Init(Width,Height,1, 1, ETextureSourceFormat::TSF_BGRA8, reinterpret_cast<uint8*>(Pixels.GetData()));
	res->UpdateResource();
	Package->MarkPackageDirty();
    //注册资源
	FAssetRegistryModule::AssetCreated(res);
	//创建LongPackageName, 并保存包
	FString PackageFileName = FPackageName::LongPackageNameToFilename(UniquePackageName, FPackageName::GetAssetPackageExtension());
	FSavePackageArgs SavePackageArgs;
	SavePackageArgs.TopLevelFlags = RF_Public | RF_Standalone;
	SavePackageArgs.SaveFlags = SAVE_NoError;
	bool bSaved = UPackage::SavePackage(Package,NULL,*PackageFileName,SavePackageArgs);
	check(bSaved)
	return res;
}