protected Layer(BinaryReader reader, ushort flags, Ase ase)
{
Level
= reader.ReadUInt16();
var defaultWidth
= reader.ReadUInt16();
var defaultHeight
= reader.ReadUInt16();
mode
= (BlendMode)reader.ReadUInt16();
opacity
= reader.ReadByte();
var future
= reader.ReadBytes(3);
Name
= Ase.ReadString(reader);
this.flags = flags;
Ase = ase;
if (Level == 0)
{
Parent = null;
}
else
{
Parent = ase.Layers.Last() as GroupLayer;
if (Parent == null)
{
throw new ArgumentException($"Layer at level {Level} (i.e. greater than 0) expects a non-null previous layer.");
}
var delta = Level - Parent.Level;
if (delta > 1)
{
throw new ArgumentException($"Level difference between this Layer and the previous is {delta} (i.e. greater than 1).");
}
try
{
while (delta++ < 1)
{
Parent = Parent.Parent;
}
Parent.GetHashCode(); // smelly null check
}
catch (NullReferenceException ex)
{
throw new ArgumentNullException("Layer heirarchy is broken.", ex);
}
}
}
private static FrameTag FromReader(BinaryReader reader)
{
ushort fromFrame
= reader.ReadUInt16();
ushort toFrame
= reader.ReadUInt16();
var direction
= reader.ReadByte();
var future
= reader.ReadBytes(8);
Color color
= Color.FromArgb(reader.ReadByte(), reader.ReadByte(), reader.ReadByte());
var zero
= reader.ReadByte();
string tagName
= Ase.ReadString(reader);
return(new FrameTag(fromFrame, toFrame, (AnimationDirection)direction, color, tagName));
}
internal static Layer FromChunk(Chunk chunk, Ase ase)
{
using (var reader = chunk.GetDataReader())
{
ushort flags
= reader.ReadUInt16();
var layerType
= reader.ReadUInt16();
switch (layerType)
{
case 0:
return(ImageLayer.FromReader(reader, flags, ase));
case 1:
return(GroupLayer.FromReader(reader, flags, ase));
default:
throw new ArgumentException($"{layerType} is not a valid layer type.");
}
}
}
internal static UserData FromChunk(Chunk chunk)
{
using (var reader = chunk.GetDataReader())
{
switch (reader.ReadUInt32())
{
case 0b00:
return(new UserData());
case 0b01:
return(new UserData(Ase.ReadString(reader)));
case 0b10:
return(new UserData(Colorizing.ReadColor(reader)));
case 0b11:
return(new UserData(Ase.ReadString(reader), Colorizing.ReadColor(reader)));
default:
throw new ArgumentException($"Unknown user data flags encountered at {reader.BaseStream.Position - 4}.");
}
}
}
internal static ImageLayer FromReader(BinaryReader reader, ushort flags, Ase ase) => new ImageLayer(reader, flags, ase);
protected ImageLayer(BinaryReader reader, ushort flags, Ase ase) : base(reader, flags, ase)
{
}
internal Frame(FrameHeader header, Ase ase)
{
this.header = header;
Ase = ase;
}
internal static GroupLayer FromReader(BinaryReader reader, ushort flags, Ase ase) => new GroupLayer(reader, flags, ase);