private string WriteObjectsChunk(Map tileMap, BinaryWriter w)
{
var extBuffer = new MemoryStream(256);
var animDictionary = new Dictionary <string, int>();
var objects = tileMap.Layers
.FlatterLayers <LayerObjects>()
.SelectMany(x => x.Objects, (x, o) => new
{
Layer = x,
Object = o
});
var objectsCount = objects.Count();
if (objectsCount == 0)
{
return(null);
}
w.Write((short)objectsCount);
var headerPos = w.BaseStream.Position;
w.Write((short)0); // RESERVED
w.Write((uint)0); // RESERVED
foreach (var entry in objects)
{
var o = entry.Object;
int flags = 0;
flags = AddFlag(flags, 0, o.Visible);
flags = AddFlag(flags, 1, o.HasShadow);
flags = AddFlag(flags, 2, (int)o.Flip);
flags = AddFlag(flags, 4, (int)o.Direction);
w.Write(Crc32.CalculateDigestAscii(o.Name));
w.Write(Crc32.CalculateDigestAscii(o.Type));
w.Write((uint)CheckEntry(animDictionary, o.AnimationData)); // To replace with Crc32 in future
w.Write(Crc32.CalculateDigestAscii(o.AnimationName));
w.Write((short)(o.X + o.Width / 2));
w.Write((short)(o.Y + o.Height / 2));
w.Write((short)o.Z);
w.Write((byte)0); // depth
w.Write((byte)entry.Layer.GetPriority());
w.Write((short)o.Width);
w.Write((short)o.Height);
w.Write((byte)flags);
w.Write((byte)0);
var extensionId = o.Extension != null?IndexOf(ObjectExtensionDefinitions, o.Extension.Id) : 0;
if (extensionId > 0)
{
extBuffer.SetLength(0);
o.Extension.Write(new BinaryWriter(extBuffer));
if ((extBuffer.Length % Alignment) != 0)
{
Log.Warning($"Extension {extensionId} {o.Extension.GetType().Name} is not aligned!");
var diff = Alignment - (extBuffer.Length % Alignment);
extBuffer.SetLength(extBuffer.Length + diff);
}
w.Write((byte)extensionId);
w.Write((byte)(extBuffer.Length / Alignment));
w.Write(extBuffer.GetBuffer(), 0, (int)extBuffer.Length);
}
else
{
w.Write((byte)0); // Extension ID
w.Write((byte)0); // Extension length
}
}
// Write animation names
var animationNames = animDictionary
.OrderBy(x => x.Value)
.Select(x =>
{
var str = x.Key;
if (Path.GetExtension(str) == ".json")
{
str = str.Substring(0, str.IndexOf(".json"));
}
var data = System.Text.Encoding.UTF8.GetBytes(str);
return(new
{
Name = str,
Data = data,
Length = data.Length
});
});
var animationNamesLength = animationNames.Sum(x => x.Length + 1);
w.Write((ushort)animDictionary.Count);
w.Write((ushort)animationNamesLength);
foreach (var item in animationNames)
{
w.Write(item.Data);
w.Write((byte)0);
}
w.Align(8);
return("OBJ\x01");
}