/// <summary>
/// Parses the bytes specified as an InteroperabilityField.
/// </summary>
/// <param name="buffer">The buffer containing the data.</param>
/// <param name="offset">The offset into the buffer to begin parsing.</param>
/// <param name="little_endian">When true, integers are in little endian format, when false integers are in big endian format.</param>
/// <returns>An InteroperabilityField object.</returns>
public static InteroperabilityField FromBytes(byte[] buffer, int offset, bool little_endian)
{
var return_value = new InteroperabilityField();
return_value.IsLittleEndian = little_endian;
return_value.Tag = TIFFHeader.ToUInt16(buffer, offset, little_endian);
return_value.Type = TIFFHeader.ToUInt16(buffer, offset + 2, little_endian);
return_value.Count = TIFFHeader.ToInt32(buffer, offset + 4, little_endian);
return_value.OffsetToValue = TIFFHeader.ToInt32(buffer, offset + 8, little_endian);
return_value.Byte0 = buffer[offset + 8];
return_value.Byte1 = buffer[offset + 9];
return_value.Byte2 = buffer[offset + 10];
return_value.Byte3 = buffer[offset + 11];
return_value.Buffer = buffer;
return(return_value);
}
public bool FromBytes(byte[] buffer, int offset, bool little_endian)
{
Empty();
if (buffer == null || offset < 0 || buffer.Length < 6)
{
return(false);
}
int number_of_entries = TIFFHeader.ToUInt16(buffer, offset, little_endian);
if (number_of_entries > 5460) // 5461 entries in 64KB buffer
{
return(false);
}
Fields = new InteroperabilityField[number_of_entries];
string tag_name = string.Empty;
int entry_index = 0;
while (entry_index < number_of_entries)
{
Fields[entry_index] = InteroperabilityField.FromBytes(buffer, offset + 2 + (entry_index * 12), little_endian);
if (TagNames != null && TagNames.TryGetValue(Fields[entry_index].Tag, out tag_name) == true)
{
Fields[entry_index].TagName = tag_name;
}
entry_index++;
}
NextOffset = TIFFHeader.ToInt32(buffer, offset + 2 + (number_of_entries * 12), little_endian);
return(true);
}
