public static long FindOffset(byte[] input, string tag)
{
using (var ms = new MemoryStream(input))
{
var reader = new BinaryReader(ms);
var it = new ChunkIterator5(reader, input.Length);
while (it.MoveNext())
{
if (it.Current.Tag == tag)
{
return(reader.BaseStream.Position);
}
}
}
return(-1);
}
public static byte[] ReadData(byte[] input, string tag)
{
using (var ms = new MemoryStream(input))
{
var reader = new BinaryReader(ms);
var it = new ChunkIterator5(reader, input.Length);
while (it.MoveNext())
{
if (it.Current.Tag == tag)
{
return(reader.ReadBytes((int)(it.Current.Size - 8)));
}
}
}
return(new byte[0]);
}
Room ReadRoomCore(long offset, long chunkSize)
{
var room = new Room {
Size = (int)chunkSize
};
var it = new ChunkIterator5(_reader, chunkSize);
var images = new Dictionary <ushort, ObjectData>();
var objCodes = new Dictionary <ushort, ObjectData>();
while (it.MoveNext())
{
switch (it.Current.Tag)
{
case "TRNS":
{
// transparent color
room.TransparentColor = _reader.ReadByte();
var unknown = _reader.ReadByte();
}
break;
case "RMHD":
// ROOM Header
room.Header = ReadRMHD();
break;
case "RMIM":
// room image
ReadRoomImage(room);
break;
case "IMAG":
ReadRoomImages(room);
break;
case "CYCL":
// CYCL
room.ColorCycle = ReadCYCL();
break;
case "EPAL":
// EPAL
ReadEPAL();
break;
case "BOXD":
// box data
{
var numBoxes = ReadNumBoxes();
for (int i = 0; i < numBoxes; i++)
{
var box = ReadBox();
room.Boxes.Add(box);
}
}
break;
case "BOXM":
// box matrix
{
var size = (int)(it.Current.Size - 8);
room.BoxMatrix.Clear();
room.BoxMatrix.AddRange(_reader.ReadBytes(size));
}
break;
case "PALS":
{
room.HasPalette = true;
var palettes = ReadPalettes().ToArray();
room.Palettes.Clear();
room.Palettes.AddRange(palettes);
}
break;
case "SCAL":
// SCAL
if (it.Current.Size > 8)
{
room.Scales = ReadSCAL();
}
break;
case "ENCD":
{
// Entry script
room.EntryScript.Data = _reader.ReadBytes((int)(it.Current.Size - 8));
}
break;
case "EXCD":
{
// exit script
room.ExitScript.Data = _reader.ReadBytes((int)(it.Current.Size - 8));
}
break;
case "NLSC":
{
// number of local scripts
var numLocalScripts = _reader.ReadUInt16();
}
break;
case "LSCR":
{
// local script
var pos = _reader.BaseStream.Position;
var index = ReadScriptIndex();
var size = 8 + _reader.BaseStream.Position - pos;
room.LocalScripts[index - GetNumGlobalScripts()] = new ScriptData
{
Data = _reader.ReadBytes((int)(it.Current.Size - size))
};
}
break;
case "OBIM":
{
// Object Image
var obj = ReadObjectImages(it.Current.Size - 8);
images[obj.Number] = obj;
}
break;
case "OBCD":
{
// object script
var obj = ReadObjectCode(it.Current.Size - 8);
objCodes[obj.Number] = obj;
}
break;
default:
UnknownChunk(it.Current);
break;
}
}
var objIds = objCodes.Values.Concat(images.Values).Select(o => o.Number).Distinct().ToList();
foreach (var objId in objIds)
{
if (images.ContainsKey(objId))
{
if (objCodes.ContainsKey(objId))
{
room.Objects.Add(Merge(images[objId], objCodes[objId]));
}
else
{
room.Objects.Add(images[objId]);
}
}
else
{
room.Objects.Add(objCodes[objId]);
}
}
return(room);
}
