public void LoadFromStream(Stream stream)
{
Contract.Requires <ArgumentNullException>(stream != null);
Contract.Requires(stream.CanRead);
Contract.Requires(stream.CanSeek);
Contract.Requires(stream.Length >= 0x80); // Header Size, Minimum Required
var origin = stream.Position;
if (stream.ReadByte() != 0x54 || stream.ReadByte() != 0x49 || stream.ReadByte() != 0x44)
{
throw new InvalidDataException("This isn't a TID file.");
}
var version = (byte)stream.ReadByte();
if (!Versions.ContainsKey(version))
{
throw new InvalidVersionException($"{version} isn't a valid version that can be read.");
}
using (var reader = new EndianBinaryReader(stream, Encoding.UTF8, true, (version & 0x01) == 0))
{
stream.Seek(0x20 + origin, SeekOrigin.Begin);
var filename = reader.ReadBytes(32);
stream.Seek(0x44 + origin, SeekOrigin.Begin);
var width = reader.ReadInt32();
var height = reader.ReadInt32();
stream.Seek(0x58 + origin, SeekOrigin.Begin);
var dataLength = reader.ReadInt32();
stream.Seek(0x64 + origin, SeekOrigin.Begin);
int compressionValue = reader.ReadInt32();
if (!Enum.IsDefined(typeof(CompressionAlgorithm), compressionValue))
{
throw new InvalidCompressionMethodException($"{compressionValue} represents an incorrect or unknown compression algorithm.");
}
CompressionAlgorithm compression = (CompressionAlgorithm)compressionValue;
if (stream.Length < 0x80 + dataLength)
{
throw new EndOfStreamException();
}
stream.Seek(0x80 + origin, SeekOrigin.Begin);
byte[] data;
if (version == 0x9A)
{
data = reader.ReadBytes(width * height * 4);
}
else
{
data = reader.ReadBytes(dataLength);
}
if (compression == CompressionAlgorithm.None)
{
if (version == 0x9A)
{
}
else if ((version & 0x02) == 0x02)
{
data = BitmapArrayTools.Swap32BppColorChannels(data, 3, 2, 1, 0);
}
else
{
data = BitmapArrayTools.Swap32BppColorChannels(data, 2, 1, 0, 3);
}
}
else
{
data = Squish.DecompressImage(data, width, height, compression.ToSquishFlags());
data = BitmapArrayTools.Swap32BppColorChannels(data, 2, 1, 0, 3);
}
if (compression == CompressionAlgorithm.Dxt1)
{
data = BitmapArrayTools.Fill32BppAlpha(data, 0, 0xFF);
}
var bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
var bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
Marshal.Copy(data, 0, bitmapData.Scan0, data.Length);
bitmap.UnlockBits(bitmapData);
Bitmap = bitmap;
Filename = filename;
Compression = compression;
Version = version;
Loaded = true;
}
}
