84 lines
2.6 KiB
C#
84 lines
2.6 KiB
C#
using System;
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using UnityEngine;
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using UnityEngine.Networking;
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using UnityEngine.Scripting;
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namespace TTSDK
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{
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/**
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* 只是用来承载 asset bundle 的获取，
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* TTAssetBundle.load 触发下载后，这里并不会获取到真正的 Asset Bundle 数据
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*/
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public class DownloadHandlerTTAssetBundle : DownloadHandlerScript
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{
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public bool isDone;
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private string _uri;
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private uint _crc;
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private AssetBundle _assetBundle;
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private byte[] _contentBytes;
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private int _contentLength;
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private static bool _isFallbackNoticed = false;
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public DownloadHandlerTTAssetBundle(string uri, uint crc)
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{
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_uri = uri;
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_crc = crc;
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}
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[Preserve]
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public AssetBundle assetBundle
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{
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get
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{
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if (_assetBundle == null)
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{
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if (TTAssetBundle.isAbfsReady)
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{
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if (_contentLength != 0)
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{
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Debug.LogError($"DownloadHandlerTTAssetBundle contentLength not 0!");
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return null;
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}
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_assetBundle = AssetBundle.LoadFromFile(_uri, _crc);
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TTAssetBundle.bundle2path.Add(_assetBundle, _uri);
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}
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else
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{
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_assetBundle = AssetBundle.LoadFromMemory(_contentBytes);
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}
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}
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return _assetBundle;
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}
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}
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[Preserve]
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protected override byte[] GetData() => _contentBytes;
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[Preserve]
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protected override bool ReceiveData(byte[] data, int dataLength)
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{
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if (data == null || dataLength < 1)
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return false;
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#if !(UNITY_WEBGL && !UNITY_EDITOR)
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if (!_isFallbackNoticed)
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{
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_isFallbackNoticed = true;
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Debug.LogWarning("TTAssetBundle 仅在 WebGL 方案有优化效果，当前环境下回滚到 UnityWebRequestAssetBundle 加载实现。");
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}
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#endif
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_contentBytes = _contentBytes != null ? _contentBytes : Array.Empty<byte>();
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Array.Resize(ref _contentBytes, _contentBytes.Length + dataLength);
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data.CopyTo(_contentBytes, _contentLength);
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_contentLength += dataLength;
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return true;
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}
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[Preserve]
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protected override void CompleteContent() => isDone = true;
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}
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} |