public AssetFile()
{
Header = new AssetPackHeader(0x52584541, 1, 0);
EntryTable = new AssetPackEntryTable();
DataOffset = 20 + (EntryTable.Entries.Length * 64);
DataOffset += 2048 - (DataOffset % 2048);
}
public AssetFile(byte[] data)
{
if (data == null)
{
Header = new AssetPackHeader(0x52584541, 1, 0);
EntryTable = new AssetPackEntryTable();
DataOffset = 20 + (EntryTable.Entries.Length * 64);
DataOffset += 2048 - (DataOffset % 2048);
return;
}
if (data.Length < 2048)
{
throw new Exception("Invalid asset file size!");
}
var magic = Swap(BitConverter.ToUInt32(data, 0));
if (magic != 0x52584541)
{
throw new Exception("Invalid asset file magic!");
}
var version = Swap(BitConverter.ToUInt32(data, 4));
if (version != 1)
{
throw new NotSupportedException("Unsupported asset file version!");
}
var datasize = Swap(BitConverter.ToUInt32(data, 8));
Header = new AssetPackHeader(magic, version, datasize);
EntryTable = new AssetPackEntryTable(data, 12);
DataOffset = 20 + (EntryTable.Entries.Length * 64);
DataOffset += 2048 - (DataOffset % 2048);
var offset = DataOffset;
for (var i = 0; i < EntryTable.Entries.Length; i++)
{
if (EntryTable.Entries[i].Size <= 0)
{
continue;
}
var tmp = new byte[EntryTable.Entries[i].Size];
Buffer.BlockCopy(data, offset, tmp, 0, tmp.Length);
SetImage(tmp, i);
offset += tmp.Length;
}
}