/// <summary>
/// Parses a DDS from a buffer.
/// </summary>
/// <param name="buffer">The buffer the DDS is stored in.</param>
/// <param name="offset">The position of the DDS in buffer.</param>
/// <param name="length">The length of the DDS in buffer.</param>
/// <returns></returns>
public static DDS Parse(byte[] buffer, int offset = 0, int length = -1)
{
if (length < 0)
{
length = buffer.Length - offset;
}
var stream = new MemoryStream(buffer, offset, length);
var reader = new BinaryReader(stream);
var dds = new DDS();
if (Encoding.ASCII.GetString(reader.ReadBytes(3)) != Magic)
{
throw new ArgumentException("Invalid Magic!");
}
dds.Variant = (DDSVariant)reader.ReadByte();
dds.Header = DDSHeader.Parse(reader.ReadBytes(DDSHeader.DefaultSize));
if (dds.Header.Flags.HasFlag(DDSHeaderFlags.PixelFormat))
{
if (dds.Header.PixelFormat.Flags.HasFlag(DDSPixelFlags.FourCC))
{
if (dds.Header.PixelFormat.FourCC == "DX10")
{
throw new NotImplementedException("DX10 not implemented!");
}
}
}
dds.ParseMipmaps(reader);
return(dds);
}
public static DDSHeader Parse(byte[] buffer, int offset = 0)
{
int length = buffer.Length - offset;
var stream = new MemoryStream(buffer, offset, length);
var reader = new BinaryReader(stream);
var header = new DDSHeader {
Size = reader.ReadUInt32()
};
if (header.Size != DefaultSize)
{
throw new ArgumentException("Wrong Header Size!");
}
header.Flags = (DDSHeaderFlags)reader.ReadUInt32();
header.Height = reader.ReadUInt32();
header.Width = reader.ReadUInt32();
header.LinearSize = reader.ReadUInt32();
header.Depth = reader.ReadUInt32();
header.MipmapCount = reader.ReadUInt32();
header.Reserved1 = new uint[11];
for (int i = 0; i < header.Reserved1.Length; i++)
{
header.Reserved1[i] = reader.ReadUInt32();
}
header.PixelFormat = DDSPixelFormat.Parse(reader.ReadBytes(32));
header.Caps = (DDSCaps)reader.ReadUInt32();
header.Caps2 = (DDSCaps2)reader.ReadUInt32();
header.Caps3 = reader.ReadUInt32();
header.Caps4 = reader.ReadUInt32();
header.Reserved2 = reader.ReadUInt32();
return(header);
}
