//************************************
// Method: try load a general asset (any type inherited from UnityEngine.Object)
//Notice : this will quickly load an asset if it already in cache, but it may fail
//************************************
public bool try_load_asset_immediately(string _asset_path, Type _type, AssetResource _result, bool _lock_asset = true)
{
if (is_destroyed_)
{
return(false);
}
if (_result.get_obj() != null)
{
Debug.LogError("resused an old assetresoure! you should create a new!");
return(false);
}
if (!bundleobj_cache_.is_first_resource_loaded())
{
return(false);
}
if (_lock_asset)
{
if (asset_lock_.is_locked(_asset_path))
{
return(false);
}
}
AssetObject found_obj = assetobj_cache_.get_from_cache(_asset_path);
if (found_obj != null)
{
_result.set_obj(found_obj);
}
else
{
return(false);
}
return(true);
}
/// <summary>
/// <para>加载UnityEngine.Object资源，资源不再使用后要调用AssetResource.Destroy()来销毁</para>
/// <para>_asset_path:资源路径,eg: "Assets/Res/DefaultRes.prefab"</para>
/// <para>_type:加载资源的类型</para>
/// <para>_result:协程结束后返回加载资源的结果</para>
/// <para>_lock_asset:为避免其他协程加载资源，是否进行锁定操作</para>
/// <para>_scene_asset:是否是场景资源</para>
/// <para>_scene_name:场景资源的名字</para>
/// </summary>
public IEnumerator load_asset(string _asset_path, Type _type, AssetResource _result, bool _lock_asset = true, bool _scene_asset = false, string _scene_name = "")
{
if (is_destroyed_)
{
yield break;
}
bool is_ui_asset = _asset_path.Contains("Assets/Res/UI");
if (Const.Language != LanguageType.SIMPLE_CHINESE)
{
LocalizeManager.Instance.LocalizePath(ref _asset_path);
}
#if UNITY_EDITOR
// 在编辑器下检查资源是否添加到打包配置中(因为lightmap的bug,.unity3d场景暂时不进行资源检查)
if (!CheckAssetCfged(_asset_path))
{
Debug.LogError(string.Format("asset {0} is not configured for bundle, load failed!", _asset_path));
yield break;
}
#endif
if (_result.get_obj() != null)
{
Debug.LogError("resused an old assetresoure! you should create a new!");
yield break;
}
//1. 等待first res加载完毕，其中包含bundleinfo
while (!bundleobj_cache_.is_first_resource_loaded())
{
yield return(new WaitForEndOfFrame());
}
loading_ = true;
// 检查资源对应的分包是否已经下载完毕
int patch_id;
if (!xpatch.XPatchManager.Instance.IsAssetDownloaded(_asset_path, out patch_id))
{
Debug.Log(string.Format("asset {0} is not download for bundle!", _asset_path));
yield break;
}
//2. 锁定资源，避免加载同一份asset
IEnumerator ielock = null;
if (_lock_asset)
{
if (!asset_lock_.try_lock(_asset_path))
{
ielock = asset_lock_.try_lock_croutine(_asset_path);
coroutine_locked_assets_.Add(ielock, _asset_path);
yield return(StartCoroutine(ielock));
}
}
//3. 检查Cache中是否已经有对应的bundle，否则需要进行加载
AssetObject found_obj = assetobj_cache_.get_from_cache(_asset_path);
if (found_obj != null)
{
_result.set_obj(found_obj);
if (_scene_asset)
{
//load level
sceneLoadAsyncOp = SceneManager.LoadSceneAsync(_scene_name);
yield return(sceneLoadAsyncOp);
}
}
else
{
#if UNITY_EDITOR
if (!EnableBundleInEditor)
{
//editor enviroment
yield return(StartCoroutine(load_asset_from_assetdatabase(_asset_path, _type, _result, _lock_asset, _scene_asset, _scene_name)));
}
else
#endif
{
//bundle enviroment
//4.从bundleinfo中获取asset的依赖项
AssetBundleInfoItem bundle_info = bundleobj_cache_.get_asset_bundle_info(_asset_path);
if (bundle_info == null)
{
Debug.LogError("Dynamic bundle not find!Editor path is " + _asset_path);
goto EXIT_LOAD_ASSET;
}
UnityEngine.Object loaded_asset = null;
List <BundleObject> all_bundles = new List <BundleObject>();
List <List <string> > sort_depends_list = bundleobj_cache_.get_asset_all_dependence(_asset_path);
foreach (List <string> sub_list in sort_depends_list)
{
// 先判断是否在Cache中
if (bundleobj_cache_.is_all_in_cache(sub_list))
{
foreach (string path in sub_list)
{
load_bundle_from_cache(path, all_bundles);
}
}
else
{
List <string> fail_list = new List <string>();
yield return(StartCoroutine(try_load_bundle_list_coroutine(sub_list, all_bundles, fail_list, is_ui_asset)));
//被其他协程锁定的bundle等待解锁后再进行加载
foreach (string depend_bundle_path in fail_list)
{
//lock
if (!bundle_lock_.try_lock(depend_bundle_path))
{
yield return(StartCoroutine(bundle_lock_.try_lock_croutine(depend_bundle_path)));
}
//load bundle and add ref
if (!load_bundle_from_cache(depend_bundle_path, all_bundles))
{
yield return(StartCoroutine(load_bundle_from_disk_coroutine(depend_bundle_path, all_bundles, is_ui_asset)));
}
//unlock
bundle_lock_.unlock(depend_bundle_path);
}
}
}
//5.锁定asset并进行加载
if (!bundle_lock_.try_lock(_asset_path))
{
yield return(StartCoroutine(bundle_lock_.try_lock_croutine(_asset_path)));
}
//load bundle and add ref
if (!load_bundle_from_cache(_asset_path, all_bundles))
{
yield return(StartCoroutine(load_bundle_from_disk_coroutine(_asset_path, all_bundles, is_ui_asset)));
}
//unlock
bundle_lock_.unlock(_asset_path);
if (all_bundles.Count < 1)
{
goto EXIT_LOAD_ASSET;
}
//6.从bundle中加载mainasset
// 在调用Bundle.Load()之前，需要将缓存所有的依赖bundle
if (!_scene_asset)
{
BundleObject root = all_bundles[all_bundles.Count - 1];
// 获取在bundle中的资源名字
/*string asset_name = root.get_asset_path_;
* int last_path_idx = asset_name.LastIndexOf('/');
* if(last_path_idx != -1)
* asset_name = asset_name.Substring(last_path_idx + 1);
* last_path_idx = asset_name.LastIndexOf('.');
* if (last_path_idx != -1)
* asset_name = asset_name.Substring(0, last_path_idx);*/
//loaded_asset = bundleobj_cache_.load_main_asset(root.get_asset_bundle_, _type, BundleNameDef.MAIN);
var loadReq = root.get_asset_bundle_.LoadAssetAsync(BundleNameDef.MAIN, _type);
yield return(loadReq);
loaded_asset = loadReq.asset;
if (loaded_asset == null)
{
Debug.LogError(string.Format("asset counld not be loaded {0} ,check xls or your project", _asset_path));
// 加载失败后要将依赖的bundle的引用计数减少
foreach (BundleObject bo in all_bundles)
{
bo.decrease_ref();// 因为load bundle的时候增加了引用计数，所以此处需要减少
}
goto EXIT_LOAD_ASSET;
}
}
// 场景资源在缓存bundle之后就可以使用
else
{
sceneLoadAsyncOp = SceneManager.LoadSceneAsync(_scene_name);
yield return(sceneLoadAsyncOp);
}
//7. 创建assetobject并添加到Cache中
AssetObject ao = _scene_asset ? new SceneAssetObject(_asset_path) : new AssetObject(_asset_path, loaded_asset);
foreach (BundleObject bo in all_bundles)
{
AssetBundleInfoItem bundle_item_depend = bundleobj_cache_.get_asset_bundle_info(bo.get_asset_path_);
bool shared = bundle_item_depend.shared;
// 当assetbundle不被多个资源引用时，可以立即将assetbundle的文件镜像卸载，并从Cache中清除
// Atlas经过特殊处理，虽然被多个资源引用，但是也会立即卸载
/// FIXME
/// 在2017版本中，此时unload assetbundle会报错
/*if(!shared)
* {
* bo.destroy(false);
* bundleobj_cache_.remove_bundle_object_from_cache(bo.get_asset_path_);
* }
* else*/
{
ao.add_depend_bundle(bo);
}
bo.decrease_ref();//decrease the ref added by load bundle
}
all_bundles.Clear();
assetobj_cache_.put_to_cache(_asset_path, ao);
_result.set_obj(ao);
}
}
//9.unlock asset
EXIT_LOAD_ASSET:
//unlock
if (_lock_asset)
{
if (ielock != null)
{
coroutine_locked_assets_.Remove(ielock);
}
asset_lock_.unlock(_asset_path);
}
loading_ = false;
}