private void LoadBundleFromFile(AssetLoadTask task)
{
string path = GetResPath(task.path);
AssetBundle ab = AssetBundle.LoadFromFile(path);
OnBundleLoaded(task, ab);
}
private void DoTask(AssetLoadTask task)
{
if (task.dependencies == null)
{
DoImmediateTask(task);
}
else
{
if (task.loadedDependenciesCount >= task.dependencies.Count)
{
DoImmediateTask(task);
}
else
{
int i = task.loadedDependenciesCount;
for (; i < task.dependencies.Count; ++i)
{
if (_assetBundlesObj.ContainsKey(task.dependencies[i]) || _persistantObjects.ContainsKey(task.dependencies[i]))
{
task.loadedDependenciesCount += 1;
if (task.loadedDependenciesCount >= task.dependencies.Count)
{
DoImmediateTask(task);
return;
}
}
else
{
AddTask(task.dependencies[i], null, task.loadType, task.id);
}
}
}
}
}
//资源加载操作
private IEnumerator LoadBundleFromWWW(AssetLoadTask task)
{
string path = GetResPath(task.path);
var www = new WWW(path);
yield return(www);
if (null != www.error)
{
Debug.LogErrorFormat("LoadBundleAsync: {0} failed! www error:{1}", task.path, www.error);
}
OnBundleLoaded(task, www.assetBundle);
www.Dispose();
}
public void RemoveTask(uint taskId, Action <Object> action)
{
if (IsLoading(taskId))
{
AssetLoadTask oldTask = null;
if (_loadingTasks.TryGetValue(taskId, out oldTask))
{
if (null != action)
{
oldTask.actions -= action;
}
}
}
}
private void DoImmediateTask(AssetLoadTask task)
{
_currentTaskCount += 1;
if ((task.loadType & (int)ResourceLoadType.LoadBundleFromWWW) != 0)
{
Client.Ins.StartCoroutine(LoadBundleFromWWW(task));
}
else if ((task.loadType & (int)ResourceLoadType.LoadBundleFromFile) != 0)
{
LoadBundleFromFile(task);
}
else
{
_currentTaskCount -= 1;
Debug.LogErrorFormat("Unknown task loadtype:{0} path:{1}", task.loadType, task.path);
}
}
//AssetBundle加载完毕
private void OnBundleLoaded(AssetLoadTask task, AssetBundle ab)
{
_currentTaskCount -= 1;
Object obj = null;
if (ab == null)
{
Debug.LogErrorFormat("LoadBundle: {0} failed! assetBundle == NULL!", task.path);
OnAseetsLoaded(task, ab, obj);
}
else
{
var loadTask = _loadTaskPool.Get();
loadTask.task = task;
loadTask.bundle = ab;
_delayLoadTask.Enqueue(loadTask);
}
}
private void DoDelayTasks()
{
if (_delayAssetLoadTask.Count > 0)
{
while (_delayAssetLoadTask.Count > 0 && _currentTaskCount < MaxTaskCount)
{
AssetLoadTask task = _delayAssetLoadTask.Dequeue();
DoTask(task);
}
}
if (_delayLoadTask.Count > 0)
{
var maxLoadTime = 0.02f;
var startTime = Time.realtimeSinceStartup;
while (_delayLoadTask.Count > 0 && Time.realtimeSinceStartup - startTime < maxLoadTime)
{
CompleteTask loadTask = _delayLoadTask.Dequeue();
var task = loadTask.task;
var bundle = loadTask.bundle;
Object obj = null;
if (bundle != null)
{
if (!bundle.isStreamedSceneAssetBundle)
{
var objs = bundle.LoadAllAssets();
if (objs.Length > 0)
{
obj = objs[0];
}
if (obj == null)
{
Debug.LogErrorFormat("LoadBundle: {0} ! No Assets in Bundle!", task.path);
}
}
}
OnAseetsLoaded(task, bundle, obj);
_loadTaskPool.Release(loadTask);
}
}
}
//Asset加载完毕,可能是依赖资源,也可能是主资源
private void OnAseetsLoaded(AssetLoadTask task, AssetBundle ab, Object obj)
{
if (_assetDependencies.ContainsKey(task.path))
{
RemoveRefCount(task.path);
}
_loadingFiles.Remove(task.path);
_loadingTasks.Remove(task.id);
//主资源加载完毕
if (task.actions != null && task.parentTaskIds == null)
{
Delegate[] delegates = task.actions.GetInvocationList();
foreach (var dele in delegates)
{
var action = (Action <Object>)dele;
try
{
if ((task.loadType & (int)ResourceLoadType.ReturnAssetBundle) > 0)
{
action(ab);
}
else
{
action(obj);
}
}
catch (Exception e)
{
Debug.LogErrorFormat("Load Bundle {0} DoAction Exception: {1}", task.path, e);
}
}
}
//缓存加载的资源对象[非AB]
if (ab != null && task.parentTaskIds == null)
{
if ((task.loadType & (int)ResourceLoadType.Persistent) > 0)
{
_persistantObjects[task.path] = obj;
if ((task.loadType & (int)ResourceLoadType.UnLoad) > 0)
{
ab.Unload(false);
}
}
else
{
if ((task.loadType & (int)ResourceLoadType.Cache) > 0)
{
var cacheObject = new CacheObject
{
lastUseTime = Time.realtimeSinceStartup,
obj = obj
};
_cacheObjects[task.path] = cacheObject;
}
if ((task.loadType & (int)ResourceLoadType.ReturnAssetBundle) == 0)
{
ab.Unload(false);
}
}
}
//依赖资源加载完毕
if (task.parentTaskIds != null)
{
_assetBundlesObj[task.path] = ab;
for (int i = 0; i < task.parentTaskIds.Count; ++i)
{
uint taskid = task.parentTaskIds[i];
AssetLoadTask pt = null;
if (_loadingTasks.TryGetValue(taskid, out pt))
{
pt.loadedDependenciesCount += 1;
if (pt.loadedDependenciesCount >= pt.dependencies.Count)
{
DoTask(pt);
}
}
}
}
task.Reset();
_assetLoadTaskPool.Release(task);
}
