private DdsImage(DdsHeader header, DdsHeaderDxt10 dx10Header, DdsHeaderXbox xboxHeader, byte[] data)
{
this.header = header;
this.dx10Header = dx10Header;
this.xboxHeader = xboxHeader;
this.data = data;
}
/// <summary>
/// Reads a DDS header and pixel data from a stream object.
/// </summary>
/// <param name="stream">The stream to read from.</param>
/// <exception cref="ArgumentNullException" />
/// <exception cref="InvalidOperationException" />
/// <exception cref="InvalidDataException" />
public static DdsImage ReadFromStream(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
using (var reader = new BinaryReader(stream, Encoding.UTF8, true))
{
if (reader.ReadUInt32() != DDS)
{
throw new InvalidOperationException("Data is not a valid DDS file");
}
if (reader.ReadUInt32() != DdsHeader.Size)
{
throw new InvalidDataException("Invalid DDS data");
}
var header = new DdsHeader();
header.Flags = (HeaderFlags)reader.ReadInt32();
header.Height = reader.ReadInt32();
header.Width = reader.ReadInt32();
header.PitchOrLinearSize = reader.ReadInt32();
header.Depth = reader.ReadInt32();
header.MipmapCount = reader.ReadInt32();
for (int i = 0; i < header.Reserved1.Length; i++)
{
header.Reserved1[i] = reader.ReadInt32();
}
if (reader.ReadInt32() != DdsPixelFormat.Size)
{
throw new InvalidDataException("Invalid DDS data");
}
header.PixelFormat.Flags = (FormatFlags)reader.ReadInt32();
header.PixelFormat.FourCC = reader.ReadInt32();
header.PixelFormat.RgbBitCount = reader.ReadInt32();
header.PixelFormat.RBitmask = reader.ReadInt32();
header.PixelFormat.GBitmask = reader.ReadInt32();
header.PixelFormat.BBitmask = reader.ReadInt32();
header.PixelFormat.ABitmask = reader.ReadInt32();
var dx10Header = new DdsHeaderDxt10();
if (header.PixelFormat.FourCC == (uint)FourCC.DX10)
{
dx10Header.DxgiFormat = (DxgiFormat)reader.ReadInt32();
dx10Header.ResourceDimension = (D3D10ResourceDimension)reader.ReadInt32();
dx10Header.MiscFlags = (D3D10ResourceMiscFlags)reader.ReadInt32();
dx10Header.ArraySize = reader.ReadInt32();
dx10Header.MiscFlags2 = (D3D10ResourceMiscFlag2)reader.ReadInt32();
}
var xboxHeader = new DdsHeaderXbox();
if (header.PixelFormat.FourCC == (uint)FourCC.XBOX)
{
xboxHeader.XboxFormat = (XboxFormat)reader.ReadInt32();
xboxHeader.ResourceDimension = (D3D10ResourceDimension)reader.ReadInt32();
xboxHeader.MiscFlags = (D3D10ResourceMiscFlags)reader.ReadInt32();
xboxHeader.ArraySize = reader.ReadInt32();
xboxHeader.MiscFlags2 = (D3D10ResourceMiscFlag2)reader.ReadInt32();
}
var data = reader.ReadBytes((int)(stream.Length - stream.Position));
return(new DdsImage(header, dx10Header, xboxHeader, data));
}
}
