public SpReader(IBinaryStream input, SpMetaData info)
{
m_input = input;
m_info = info;
m_output = new byte[info.Width * info.Height];
m_stride = (int)info.Width;
}
public override ImageMetaData ReadMetaData(IBinaryStream file)
{
var header = file.ReadHeader(0x22);
if (header.ToInt32(4) != 0)
{
return(null);
}
int flags = header.ToUInt16(0);
if ((flags & ~0xFF) != 0 || header[2] != 1)
{
return(null);
}
var info = new SpMetaData {
Width = header.ToUInt16(0x16),
Height = header.ToUInt16(0x18),
BPP = 8,
Flags = flags,
Colors = header.ToUInt16(0x1E),
};
if (info.Width == 0 || info.Width > 0x2000 || info.Height == 0 || info.Height > 0x2000 ||
info.Colors > 0x100)
{
return(null);
}
if (info.IsEncrypted)
{
if (null == DefaultKey)
{
DefaultKey = QueryKey(file.Name);
if (null == DefaultKey)
{
return(null);
}
}
info.Key = DefaultKey;
}
return(info);
}
