77 lines
2.9 KiB
C#
77 lines
2.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.IO.Compression;
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using UnityEngine;
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using UnityEditor.AssetImporters;
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#if !UNITY_2022_1_OR_NEWER
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using UnityEditor.Experimental.AssetImporters;
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#endif
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namespace Proxima.Editor
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{
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[ScriptedImporter(1, "proximastatic")]
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internal class ProximaStaticImporter : ScriptedImporter
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{
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// Custom ZIP file importer because ZipFile isn't supported on older Unity versions.
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public override void OnImportAsset(AssetImportContext ctx)
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{
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var asset = ScriptableObject.CreateInstance<ProximaStatic>();
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asset.Files = new List<ProximaStatic.StaticFile>();
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var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
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var data = File.ReadAllBytes(ctx.assetPath);
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var br = new BinaryReader(new MemoryStream(data));
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br.ReadByte(); // extra byte
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while (true)
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{
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var sig = br.ReadInt32(); // signature
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if (sig != 0x04034b50)
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{
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break;
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}
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br.ReadInt16(); // version
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br.ReadInt16(); // flags
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br.ReadInt16(); // compression
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var lastModifiedTime = br.ReadUInt16(); // last modified time
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var lastModifiedDate = br.ReadUInt16(); // last modified date
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br.ReadInt32(); // crc32
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var compressedSize = br.ReadInt32(); // compressed size
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var uncompressedSize = br.ReadInt32(); // uncompressed size
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var nameLength = br.ReadUInt16();
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var extraLength = br.ReadUInt16();
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var name = new string(br.ReadChars(nameLength));
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var extra = br.ReadBytes(extraLength);
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var compressedData = br.ReadBytes(compressedSize);
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var uncompressedData = new byte[uncompressedSize];
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using (var deflateStream = new DeflateStream(new MemoryStream(compressedData), CompressionMode.Decompress))
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{
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deflateStream.Read(uncompressedData, 0, uncompressedSize);
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}
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var entry = new ProximaStatic.StaticFile();
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entry.Path = name.Replace('\\', '/');
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entry.Bytes = uncompressedData;
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var lastModified = new DateTime(
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1980 + (lastModifiedDate >> 9),
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(lastModifiedDate >> 5) & 0xF,
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lastModifiedDate & 0x1F,
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lastModifiedTime >> 11,
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(lastModifiedTime >> 5) & 0x3F,
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(lastModifiedTime & 0x1F) << 1);
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entry.LastModified = (long)(lastModified - epoch).TotalMilliseconds;
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asset.Files.Add(entry);
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}
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ctx.AddObjectToAsset("main obj", asset);
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ctx.SetMainObject(asset);
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}
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}
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} |