public override IImageDecoder OpenImage(ArcFile arc, Entry entry)
{
const int header_size = 32;
var ement = (EmEntry)entry;
if (ement.SubType != 4)
{
return(base.OpenImage(arc, entry));
}
var emarc = (EmeArchive)arc;
var header = arc.File.View.ReadBytes(entry.Offset, header_size);
Decrypt(header, 0, header_size, emarc.Key);
var info = new EmMetaData {
LzssFrameSize = ement.LzssFrameSize,
LzssInitPos = ement.LzssInitPos,
BPP = header.ToUInt16(0) & 0xFF,
Width = header.ToUInt16(2),
Height = header.ToUInt16(4),
Colors = header.ToUInt16(6),
Stride = header.ToInt32(8),
OffsetX = header.ToInt32(0xC),
OffsetY = header.ToInt32(0x10),
DataOffset = header_size,
};
uint entry_size = entry.Size + header_size;
if (0 != info.Colors && header[0] != 7)
{
entry_size += (uint)Math.Max(info.Colors, 3) * 4;
}
var input = arc.File.CreateStream(entry.Offset, entry_size);
return(new EmeImageDecoder(input, info));
}
public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
stream.ReadInt32();
var info = new EmMetaData();
info.LzssFrameSize = stream.ReadUInt16();
info.LzssInitPos = stream.ReadUInt16();
info.BPP = stream.ReadUInt16() & 0xFF;
info.Width = stream.ReadUInt16();
info.Height = stream.ReadUInt16();
info.Colors = stream.ReadUInt16();
info.Stride = stream.ReadInt32();
info.OffsetX = stream.ReadInt32();
info.OffsetY = stream.ReadInt32();
info.DataOffset = 40;
return(info);
}
public override ImageMetaData ReadMetaData(Stream stream)
{
using (var reader = new ArcView.Reader(stream))
{
reader.ReadInt32();
var info = new EmMetaData();
info.LzssFrameSize = reader.ReadUInt16();
info.LzssInitPos = reader.ReadUInt16();
info.BPP = reader.ReadUInt16() & 0xFF;
info.Width = reader.ReadUInt16();
info.Height = reader.ReadUInt16();
info.Colors = reader.ReadUInt16();
info.Stride = reader.ReadInt32();
info.OffsetX = reader.ReadInt32();
info.OffsetY = reader.ReadInt32();
info.DataOffset = 40;
return(info);
}
}
public EmeImageDecoder(IBinaryStream input, EmMetaData info) : base(input, info)
{
}