public byte[] Rebuild()
{
FileOutput o = new FileOutput();
FileOutput data = new FileOutput();
//We always want BE for the first six bytes
o.Endian = Endianness.Big;
data.Endian = Endianness.Big;
if (Endian == Endianness.Big)
{
o.writeUInt(0x4E545033); //NTP3
}
else if (Endian == Endianness.Little)
{
o.writeUInt(0x4E545744); //NTWD
}
//Most NTWU NUTs are 0x020E, which isn't valid for NTP3/NTWD
if (Version > 0x0200)
{
Version = 0x0200;
}
o.writeUShort(Version);
//After that, endian is used appropriately
o.Endian = Endian;
data.Endian = Endian;
o.writeUShort((ushort)Textures.Count);
o.writeInt(0);
o.writeInt(0);
//calculate total header size
uint headerLength = 0;
foreach (NutTexture texture in Textures)
{
byte surfaceCount = (byte)texture.surfaces.Count;
bool isCubemap = surfaceCount == 6;
if (surfaceCount < 1 || surfaceCount > 6)
{
throw new NotImplementedException($"Unsupported surface amount {surfaceCount} for texture with hash 0x{texture.HashId:X}. 1 to 6 faces are required.");
}
else if (surfaceCount > 1 && surfaceCount < 6)
{
throw new NotImplementedException($"Unsupported cubemap face amount for texture with hash 0x{texture.HashId:X}. Six faces are required.");
}
byte mipmapCount = (byte)texture.surfaces[0].mipmaps.Count;
ushort headerSize = 0x50;
if (isCubemap)
{
headerSize += 0x10;
}
if (mipmapCount > 1)
{
headerSize += (ushort)(mipmapCount * 4);
while (headerSize % 0x10 != 0)
{
headerSize += 1;
}
}
headerLength += headerSize;
}
// write headers+data
foreach (NutTexture texture in Textures)
{
byte surfaceCount = (byte)texture.surfaces.Count;
bool isCubemap = surfaceCount == 6;
byte mipmapCount = (byte)texture.surfaces[0].mipmaps.Count;
uint dataSize = 0;
foreach (var mip in texture.GetAllMipmaps())
{
dataSize += (uint)mip.Length;
while (dataSize % 0x10 != 0)
{
dataSize += 1;
}
}
ushort headerSize = 0x50;
if (isCubemap)
{
headerSize += 0x10;
}
if (mipmapCount > 1)
{
headerSize += (ushort)(mipmapCount * 4);
while (headerSize % 0x10 != 0)
{
headerSize += 1;
}
}
o.writeUInt(dataSize + headerSize);
o.writeUInt(0);
o.writeUInt(dataSize);
o.writeUShort(headerSize);
o.writeUShort(0);
o.writeByte(0);
o.writeByte(mipmapCount);
o.writeByte(0);
o.writeByte(texture.getNutFormat());
o.writeShort(texture.Width);
o.writeShort(texture.Height);
o.writeInt(0);
o.writeUInt(texture.DdsCaps2);
if (Version < 0x0200)
{
o.writeUInt(0);
}
else if (Version >= 0x0200)
{
o.writeUInt((uint)(headerLength + data.size()));
}
headerLength -= headerSize;
o.writeInt(0);
o.writeInt(0);
o.writeInt(0);
if (isCubemap)
{
o.writeInt(texture.surfaces[0].mipmaps[0].Length);
o.writeInt(texture.surfaces[0].mipmaps[0].Length);
o.writeInt(0);
o.writeInt(0);
}
if (texture.getNutFormat() == 14 || texture.getNutFormat() == 17)
{
texture.SwapChannelOrderDown();
}
for (byte surfaceLevel = 0; surfaceLevel < surfaceCount; ++surfaceLevel)
{
for (byte mipLevel = 0; mipLevel < mipmapCount; ++mipLevel)
{
int ds = data.size();
data.writeBytes(texture.surfaces[surfaceLevel].mipmaps[mipLevel]);
data.align(0x10);
if (mipmapCount > 1 && surfaceLevel == 0)
{
o.writeInt(data.size() - ds);
}
}
}
o.align(0x10);
if (texture.getNutFormat() == 14 || texture.getNutFormat() == 17)
{
texture.SwapChannelOrderUp();
}
o.writeBytes(new byte[] { 0x65, 0x58, 0x74, 0x00 }); // "eXt\0"
o.writeInt(0x20);
o.writeInt(0x10);
o.writeInt(0x00);
o.writeBytes(new byte[] { 0x47, 0x49, 0x44, 0x58 }); // "GIDX"
o.writeInt(0x10);
o.writeInt(texture.HashId);
o.writeInt(0);
if (Version < 0x0200)
{
o.writeOutput(data);
data = new FileOutput();
}
}
if (Version >= 0x0200)
{
o.writeOutput(data);
}
return(o.getBytes());
}