public static SFFHEADERv2 LoadFromStream(Stream stream)
{
SFFHEADERv2 ret = new SFFHEADERv2 ();
if (stream == null)
return ret;
var mgr = FilePathMgr.GetInstance ();
ret.signature = mgr.ReadString (stream, 12, System.Text.Encoding.UTF8);
ret.verhi = (byte)stream.ReadByte ();
ret.verlo = (byte)stream.ReadByte ();
ret.verhi2 = (byte)stream.ReadByte ();
ret.verlo2 = (byte)stream.ReadByte ();
ret.reserved1 = (uint)mgr.ReadInt (stream);
ret.reserved2 = (uint)mgr.ReadInt (stream);
ret.compatverlo3 = (byte)stream.ReadByte ();
ret.compatverlo1 = (byte)stream.ReadByte ();
ret.compatverlo2 = (byte)stream.ReadByte ();
ret.compatverhi = (byte)stream.ReadByte ();
ret.reserved3 = (uint)mgr.ReadInt (stream);
ret.reserved4 = (uint)mgr.ReadInt (stream);
ret.offsetSubFile = (uint)mgr.ReadInt (stream);
ret.totalImage = (uint)mgr.ReadInt (stream);
ret.offsetPaletteFile = (uint)mgr.ReadInt (stream);
ret.totalPalette = (uint)mgr.ReadInt (stream);
ret.offsetLData = (uint)mgr.ReadInt (stream);
ret.sizeLData = (uint)mgr.ReadInt (stream);
ret.offsetTData = (uint)mgr.ReadInt (stream);
ret.sizeTData = (uint)mgr.ReadInt (stream);
ret.reserved5 = (uint)mgr.ReadInt (stream);
ret.reserved6 = (uint)mgr.ReadInt (stream);
ret.comments = mgr.ReadString (stream, 436, System.Text.Encoding.UTF8);
return ret;
}
private bool LoadSubFilesV2(SFFHEADERv2 header, Stream stream)
{
if (stream == null || header.offsetSubFile == 0)
return false;
int offset = (int)header.offsetSubFile;
if (offset < 0 || offset >= stream.Length)
return false;
int cnt = (int)header.totalImage;
if (cnt < 0)
return false;
if (stream.Seek (offset, SeekOrigin.Begin) != offset)
return false;
var filePathMgr = FilePathMgr.GetInstance ();
for (int i = 0; i < cnt; ++i) {
SFFSUBHEADERv2 subHeader = SFFSUBHEADERv2.LoadFromStream (stream);
SubHeadersV2.Add (subHeader);
}
if (mSubHeadersV2 != null) {
for (int i = 0; i < mSubHeadersV2.Count; ++i) {
var subHeader = mSubHeadersV2 [i];
KeyValuePair<uint, uint> key = new KeyValuePair<uint, uint> ((uint)subHeader.GroubNumber, (uint)subHeader.ImageNumber);
if (mPcxDataMap.ContainsKey (key))
continue;
// 读取pcx
if (subHeader.subfileLength == 0 && subHeader.IndexOfPrevious != 0) {
// LINK模式
} else {
if (subHeader.subfileLength == 0)
continue;
int off = (int)subHeader.offsetData;
if (off > 0) {
stream.Seek (off, SeekOrigin.Begin);
byte[] buffer = new byte[subHeader.subfileLength];
stream.Read (buffer, 0, buffer.Length);
buffer = DeCompressBuffer (buffer, (PcxCompressType)subHeader.fmt);
}
}
}
}
return true;
}
private bool Load(byte[] bytes)
{
mPcxDataMap.Clear();
if (mSubHeaders != null)
mSubHeaders.Clear();
if ((bytes == null) || (bytes.Length <= 0))
{
mIsVaild = false;
return false;
}
// 判断是否是v2的文件
if (bytes.Length < 16)
{
mIsVaild = false;
return false;
}
byte v1 = bytes[15];
byte v2;
byte v3;
byte v4;
if (v1 == 2)
{
SFFHEADERv2 header = new SFFHEADERv2();
int headerSize = Marshal.SizeOf(header);
IntPtr headerBuffer = Marshal.AllocHGlobal(headerSize);
try
{
Marshal.Copy(bytes, 0, headerBuffer, headerSize);
header = (SFFHEADERv2)Marshal.PtrToStructure(headerBuffer, typeof(SFFHEADERv2));
}
finally
{
Marshal.FreeHGlobal(headerBuffer);
}
MemoryStream stream = new MemoryStream (bytes);
try
{
// SFFHEADERv2 header = SFFHEADERv2.LoadFromStream (stream);
int comp = string.Compare(header.signature, _cElecbyteSpr, true);
if (comp != 0)
return false;
v1 = header.verlo2;
v2 = header.verlo;
v3 = header.verhi2;
v4 = header.verhi;
if (!LoadSubFilesV2(header, stream))
return false;
} finally {
stream.Close ();
stream.Dispose ();
}
}
else if (v1 == 1)
{
SFFHEADER header = new SFFHEADER();
int headerSize = Marshal.SizeOf(header);
IntPtr headerBuffer = Marshal.AllocHGlobal(headerSize);
try
{
Marshal.Copy(bytes, 0, headerBuffer, headerSize);
header = (SFFHEADER)Marshal.PtrToStructure(headerBuffer, typeof(SFFHEADER));
}
finally
{
Marshal.FreeHGlobal(headerBuffer);
}
if (string.Compare(header.signature, _cElecbyteSpr, true) != 0)
return false;
v1 = header.verlo2;
v2 = header.verlo;
v3 = header.verhi2;
v4 = header.verhi;
if (v1 > 1)
{
Debug.LogErrorFormat("sff file not supoort v{0:D}.{1:D}.{2:D}.{3:D}", v1, v2, v3, v4);
return false;
}
// MemoryStream stream = new MemoryStream(bytes);
try
{
if (!LoadSubFiles(header, bytes))
return false;
// if (!LoadSubFiles(header, stream))
// return false;
if (!LoadPcxs(header, bytes))
return false;
} finally
{
// stream.Close();
// stream.Dispose();
}
} else
{
Debug.LogErrorFormat("sff file not supoort v{0:D}", v1);
return false;
}
if (v1 > 1)
{
Debug.LogErrorFormat("sff file not supoort v{0:D}.{1:D}.{2:D}.{3:D}", v1, v2, v3, v4);
return false;
}
mIsVaild = true;
return true;
}
