public TEX(Stream input)
{
using (var br = new BinaryReaderX(input))
{
// Set endianess
if (br.PeekString() == "\0XET")
{
br.ByteOrder = ByteOrder = ByteOrder.BigEndian;
}
// Header
Header = br.ReadType <FileHeader>();
HeaderInfo = new FileHeaderInfo
{
// Block 1
Version = (Version)(Header.Block1 & 0xFFF),
Unknown1 = (int)((Header.Block1 >> 12) & 0xFFF),
Unused1 = (int)((Header.Block1 >> 24) & 0xF),
AlphaChannelFlags = (AlphaChannelFlags)((Header.Block1 >> 28) & 0xF),
// Block 2
MipMapCount = (int)(Header.Block2 & 0x3F),
Width = (int)((Header.Block2 >> 6) & 0x1FFF),
Height = Math.Max((int)((Header.Block2 >> 19) & 0x1FFF), MinHeight),
// Block 3
Unknown2 = (int)(Header.Block3 & 0xFF),
Format = (byte)((Header.Block3 >> 8) & 0xFF),
Unknown3 = (int)((Header.Block3 >> 16) & 0xFFFF)
};
if (HeaderInfo.Version == Version._Switchv1 && !SwitchFormats.ContainsKey(HeaderInfo.Format))
{
throw new ImageFormatException($"Switch texture format 0x{HeaderInfo.Format.ToString("X2")} is not implemented.");
}
else if (!Formats.ContainsKey(HeaderInfo.Format))
{
throw new ImageFormatException($"Texture format 0x{HeaderInfo.Format.ToString("X2")} is not implemented.");
}
// TODO: Consider whether the following settings make more sense if conditioned by the ByteOrder (or Platform)
//var format = HeaderInfo.Format.ToString().StartsWith("DXT1") ? Format.DXT1 : HeaderInfo.Format.ToString().StartsWith("DXT5") ? Format.DXT5 : HeaderInfo.Format;
Settings.Format = (HeaderInfo.Version == Version._Switchv1) ? SwitchFormats[HeaderInfo.Format] : Formats[HeaderInfo.Format];
List <int> mipMaps = null;
if (HeaderInfo.Version == Version._Switchv1)
{
var texOverallSize = br.ReadInt32();
if (texOverallSize > br.BaseStream.Length)
{
br.BaseStream.Position -= 4;
SwitchUnknownData = br.ReadBytes(0x6C);
texOverallSize = br.ReadInt32();
HeaderInfo.MipMapCount++;
}
mipMaps = br.ReadMultiple <int>(HeaderInfo.MipMapCount);
}
else if (HeaderInfo.Version != Version._3DSv1)
{
mipMaps = br.ReadMultiple <int>(HeaderInfo.MipMapCount);
}
for (var i = 0; i < mipMaps.Count; i++)
{
var texDataSize = 0;
if (SwitchUnknownData != null)
{
if (i + 1 == HeaderInfo.MipMapCount)
{
continue;
}
texDataSize = mipMaps[i + 1] - mipMaps[i];
}
else if (HeaderInfo.Version != Version._3DSv1)
{
texDataSize = (i + 1 < HeaderInfo.MipMapCount ? mipMaps[i + 1] : (int)br.BaseStream.Length) - mipMaps[i];
}
else
{
texDataSize = Formats[HeaderInfo.Format].BitDepth * (HeaderInfo.Width >> i) * (HeaderInfo.Height >> i) / 8;
}
Settings.Width = Math.Max(HeaderInfo.Width >> i, 2);
Settings.Height = Math.Max(HeaderInfo.Height >> i, 2);
//Set possible Swizzles
if (HeaderInfo.Version == Version._3DSv1 || HeaderInfo.Version == Version._3DSv2 || HeaderInfo.Version == Version._3DSv3)
{
Settings.Swizzle = new CTRSwizzle(Settings.Width, Settings.Height);
}
else if (HeaderInfo.Version == Version._Switchv1)
{
Settings.Swizzle = new NXSwizzle(Settings.Width, Settings.Height, Settings.Format.BitDepth, GetSwitchSwizzleFormat(Settings.Format.FormatName));
}
else if (Settings.Format.FormatName.Contains("DXT"))
{
Settings.Swizzle = new BlockSwizzle(Settings.Width, Settings.Height);
}
//Set possible pixel shaders
if ((Format)HeaderInfo.Format == Format.DXT5_B)
{
Settings.PixelShader = ToNoAlpha;
}
else if ((Format)HeaderInfo.Format == Format.DXT5_YCbCr)
{
Settings.PixelShader = ToProperColors;
}
Bitmaps.Add(Common.Load(br.ReadBytes(texDataSize), Settings));
}
if (SwitchUnknownData != null)
{
SwitchOverflowingData = br.ReadBytes((int)(br.BaseStream.Length - br.BaseStream.Position));
}
}
}
