public NutTexture ToNutTexture()
{
NutTexture tex = new NutTexture();
tex.isDds = true;
tex.HashId = 0x48415348;
tex.Height = (int)header.height;
tex.Width = (int)header.width;
byte surfaceCount = 1;
bool isCubemap = (header.caps2 & (uint)DDSCAPS2.CUBEMAP) == (uint)DDSCAPS2.CUBEMAP;
if (isCubemap)
{
if ((header.caps2 & (uint)DDSCAPS2.CUBEMAP_ALLFACES) == (uint)DDSCAPS2.CUBEMAP_ALLFACES)
{
surfaceCount = 6;
}
else
{
throw new NotImplementedException($"Unsupported cubemap face amount for texture. Six faces are required.");
}
}
bool isBlock = true;
switch (header.ddspf.fourCC)
{
case 0x00000000: //RGBA
isBlock = false;
tex.pixelInternalFormat = PixelInternalFormat.Rgba;
tex.pixelFormat = OpenTK.Graphics.OpenGL.PixelFormat.Rgba;
break;
case 0x31545844: //DXT1
tex.pixelInternalFormat = PixelInternalFormat.CompressedRgbaS3tcDxt1Ext;
break;
case 0x33545844: //DXT3
tex.pixelInternalFormat = PixelInternalFormat.CompressedRgbaS3tcDxt3Ext;
break;
case 0x35545844: //DXT5
tex.pixelInternalFormat = PixelInternalFormat.CompressedRgbaS3tcDxt5Ext;
break;
case 0x31495441: //ATI1
case 0x55344342: //BC4U
tex.pixelInternalFormat = PixelInternalFormat.CompressedRedRgtc1;
break;
case 0x32495441: //ATI2
case 0x55354342: //BC5U
tex.pixelInternalFormat = PixelInternalFormat.CompressedRgRgtc2;
break;
default:
MessageBox.Show("Unsupported DDS format - 0x" + header.ddspf.fourCC.ToString("x"));
break;
}
uint formatSize = getFormatSize(header.ddspf.fourCC);
FileData d = new FileData(bdata);
if (header.mipmapCount == 0)
{
header.mipmapCount = 1;
}
uint off = 0;
for (byte i = 0; i < surfaceCount; ++i)
{
TextureSurface surface = new TextureSurface();
uint w = header.width, h = header.height;
for (int j = 0; j < header.mipmapCount; ++j)
{
//If texture is DXT5 and isn't square, limit the mipmaps to an amount such that width and height are each always >= 4
if (tex.pixelInternalFormat == PixelInternalFormat.CompressedRgbaS3tcDxt5Ext && tex.Width != tex.Height && (w < 4 || h < 4))
{
break;
}
uint s = (w * h); //Total pixels
if (isBlock)
{
s = (uint)(s * ((float)formatSize / 0x10)); //Bytes per 16 pixels
if (s < formatSize) //Make sure it's at least one block
{
s = formatSize;
}
}
else
{
s = (uint)(s * (formatSize)); //Bytes per pixel
}
w /= 2;
h /= 2;
surface.mipmaps.Add(d.getSection((int)off, (int)s));
off += s;
}
tex.surfaces.Add(surface);
}
return(tex);
}
public void ReadNTP3(FileData d, bool skipTextures = true)
{
d.seek(0x6);
ushort count = d.readUShort();
d.skip(0x8);
int headerPtr = 0x10;
for (ushort i = 0; i < count; ++i)
{
d.seek(headerPtr);
NutTexture tex = new NutTexture();
tex.isDds = true;
tex.pixelInternalFormat = PixelInternalFormat.Rgba32ui;
int totalSize = d.readInt();
d.skip(4);
int dataSize = d.readInt();
int headerSize = d.readUShort();
d.skip(2);
//It might seem that mipmapCount and pixelFormat would be shorts, but they're bytes because they stay in the same place regardless of endianness
d.skip(1);
byte mipmapCount = d.readByte();
d.skip(1);
tex.setPixelFormatFromNutFormat(d.readByte());
tex.Width = d.readUShort();
tex.Height = d.readUShort();
d.skip(4); //0 in dds nuts (like NTP3) and 1 in gtx nuts; texture type?
uint caps2 = d.readUInt();
bool isCubemap = false;
byte surfaceCount = 1;
if ((caps2 & (uint)DDS.DDSCAPS2.CUBEMAP) == (uint)DDS.DDSCAPS2.CUBEMAP)
{
//Only supporting all six faces
if ((caps2 & (uint)DDS.DDSCAPS2.CUBEMAP_ALLFACES) == (uint)DDS.DDSCAPS2.CUBEMAP_ALLFACES)
{
isCubemap = true;
surfaceCount = 6;
}
else
{
throw new NotImplementedException($"Unsupported cubemap face amount for texture {i} with hash 0x{tex.HashId:X}. Six faces are required.");
}
}
int dataOffset = 0;
if (Version < 0x0200)
{
dataOffset = headerPtr + headerSize;
d.readInt();
}
else if (Version >= 0x0200)
{
dataOffset = d.readInt() + headerPtr;
}
d.readInt();
d.readInt();
d.readInt();
//The size of a single cubemap face (discounting mipmaps). I don't know why it is repeated. If mipmaps are present, this is also specified in the mipSize section anyway.
int cmapSize1 = 0;
int cmapSize2 = 0;
if (isCubemap)
{
cmapSize1 = d.readInt();
cmapSize2 = d.readInt();
d.skip(8);
}
int[] mipSizes = new int[mipmapCount];
if (mipmapCount == 1)
{
if (isCubemap)
{
mipSizes[0] = cmapSize1;
}
else
{
mipSizes[0] = dataSize;
}
}
else
{
for (byte mipLevel = 0; mipLevel < mipmapCount; ++mipLevel)
{
mipSizes[mipLevel] = d.readInt();
}
d.align(0x10);
}
d.skip(0x10); //eXt data - always the same
d.skip(4); //GIDX
d.readInt(); //Always 0x10
tex.HashOffset = d.pos();
tex.HashId = d.readInt();
d.skip(4); // padding align 8
if (!skipTextures)
{
for (byte surfaceLevel = 0; surfaceLevel < surfaceCount; ++surfaceLevel)
{
TextureSurface surface = new TextureSurface();
for (byte mipLevel = 0; mipLevel < mipmapCount; ++mipLevel)
{
byte[] texArray = d.getSection(dataOffset, mipSizes[mipLevel]);
surface.mipmaps.Add(texArray);
dataOffset += mipSizes[mipLevel];
}
tex.surfaces.Add(surface);
}
if (tex.getNutFormat() == 14 || tex.getNutFormat() == 17)
{
tex.SwapChannelOrderUp();
}
}
if (Version < 0x0200)
{
headerPtr += totalSize;
}
else if (Version >= 0x0200)
{
headerPtr += headerSize;
}
Textures.Add(tex);
}
}