/// <summary>
/// Creates a new EDID instance with the provided EDID binary data
/// </summary>
/// <param name="data">An array of bytes holding the EDID binary data</param>
/// <exception cref="InvalidEDIDException">Invalid EDID binary data.</exception>
public EDID(byte[] data)
{
if (data.Length < 128)
{
throw new InvalidEDIDException("EDID data must be at least 128 bytes.");
}
_reader = new BitAwareReader(data);
if (!_reader.ReadBytes(0, 8).SequenceEqual(FixedHeader))
{
throw new InvalidEDIDException("EDID header missing.");
}
if (_reader.Data.Take(128).Aggregate(0, (i, b) => (i + b) % 256) > 0)
{
throw new InvalidEDIDException("EDID checksum failed.");
}
if (EDIDVersion.Major != 1)
{
throw new InvalidEDIDException("Invalid EDID major version.");
}
if (EDIDVersion.Minor == 0)
{
throw new InvalidEDIDException("Invalid EDID minor version.");
}
DisplayParameters = new DisplayParameters(this, _reader);
}
internal static EDIDDescriptor FromData(EDID edid, BitAwareReader reader, int offset)
{
var types =
Assembly.GetAssembly(typeof(EDIDDescriptor))
.GetTypes()
.Where(t => t.IsSubclassOf(typeof(EDIDDescriptor)));
foreach (var type in types)
{
try
{
var value = Activator.CreateInstance(type, BindingFlags.NonPublic | BindingFlags.Instance, null,
new object[] { edid, reader, offset }, null) as EDIDDescriptor;
if (value?.IsValid == true)
{
return(value);
}
}
catch
{
// ignored
}
}
return(null);
}
internal EDIDExtension(EDID edid, BitAwareReader reader, int offset)
{
EDID = edid;
Reader = reader;
Offset = offset;
if (reader.Data.Length - offset < 128)
{
throw new InvalidExtensionException("Extension data must be exactly 128 bytes.");
}
if (reader.Data.Skip(offset).Take(128).Aggregate(0, (i, b) => (i + b) % 256) > 0)
{
throw new InvalidExtensionException("Extension checksum failed.");
}
}
internal ChromaticityCoordinates(BitAwareReader reader)
{
_reader = reader;
}
internal DisplayParameters(EDID edid, BitAwareReader reader)
{
_edid = edid;
_reader = reader;
}
internal EDIDDescriptor(EDID edid, BitAwareReader reader, int offset)
{
EDID = edid;
Reader = reader;
Offset = offset;
}