public override ArcFile TryOpen(ArcView file)
{
if (!file.View.AsciiEqual(4, "X200"))
{
return(null);
}
using (var gal = file.CreateStream())
{
var info = GalXFormat.ReadMetaData(gal) as GalXMetaData;
if (null == info || !IsSaneCount(info.FrameCount))
{
return(null);
}
var base_name = Path.GetFileNameWithoutExtension(file.Name);
gal.Position = info.DataOffset;
var dir = new List <Entry> (info.FrameCount);
foreach (XmlNode node in info.FrameXml.SelectNodes("Frame"))
{
var layers = node.SelectSingleNode("Layers");
var entry = new GalXEntry {
Name = string.Format("{0}#{1:D4}", base_name, dir.Count),
Type = "image",
Offset = gal.Position,
Layers = layers,
Info = info,
};
var nodes = layers.SelectNodes("Layer");
entry.AlphaOn = nodes.Count > 0 && nodes[0].Attributes["AlphaOn"].Value != "0";
foreach (XmlNode layer in nodes)
{
bool alpha_on = layer.Attributes["AlphaOn"].Value != "0";
uint layer_size = gal.ReadUInt32();
gal.Seek(layer_size, SeekOrigin.Current);
if (alpha_on)
{
uint alpha_size = gal.ReadUInt32();
gal.Seek(alpha_size, SeekOrigin.Current);
}
}
entry.Size = (uint)(gal.Position - entry.Offset);
dir.Add(entry);
}
return(new ArcFile(file, this, dir));
}
}
public GalXDecoder(IBinaryStream input, GalXEntry entry) : base(input, entry.Info, 0)
{
m_frames.Add(GetFrameFromLayers(entry.Layers));
m_alpha_on = entry.AlphaOn;
}