public DDSMetadata(uint width, uint height, uint mipscount = 0,
ETextureFormat format = ETextureFormat.TEXFMT_R8G8B8A8, uint bpp = 16,
bool iscubemap = false, uint slicecount = 0, bool normal = false)
{
Width = width;
Height = height;
Mipscount = mipscount;
Format = format;
Bpp = bpp;
Iscubemap = iscubemap;
Slicecount = slicecount;
Normal = normal;
}
public void Extract(Stream output)
{
using (var file = MemoryMappedFile.CreateFromFile(this.ParentFile, FileMode.Open))
{
// generate header
ETextureFormat format = formats[Type1];
var metadata = new DDSMetadata(
BaseWidth,
BaseHeight,
(uint)Mipcount,
format,
BaseAlignment,
IsCube == 1,
SliceCount,
false
);
DDSUtils.GenerateAndWriteHeader(output, metadata);
if (IsCube == 0)
{
using (var viewstream = file.CreateViewStream((PageOFfset * 4096) + 9, ZSize, MemoryMappedFileAccess.Read))
{
//if ( format != ETextureFormat.TEXFMT_R8G8B8A8)
new ZlibStream(viewstream, CompressionMode.Decompress).CopyTo(output);
}
for (int i = 0; i < NumMipOffsets; i++)
{
var mippageoffset = MipMapInfo[i].Item1;
var mipzsize = MipMapInfo[i].Item2;
using (var viewstream = file.CreateViewStream((mippageoffset), mipzsize, MemoryMappedFileAccess.Read))
{
//if ( format != ETextureFormat.TEXFMT_R8G8B8A8)
new ZlibStream(viewstream, CompressionMode.Decompress).CopyTo(output);
}
}
}
else
{
using (var imagestream = new MemoryStream())
using (var mipmapstream = new MemoryStream())
using (var imagereader = new BinaryReader(imagestream))
using (var mipmapreader = new BinaryReader(mipmapstream))
{
// extract to memory
// image
using (var vs = file.CreateViewStream((PageOFfset * 4096) + 9, ZSize, MemoryMappedFileAccess.Read))
{
//if ( format != ETextureFormat.TEXFMT_R8G8B8A8)
new ZlibStream(vs, CompressionMode.Decompress).CopyTo(imagestream);
}
//mipmaps
var mipmapoffsets = new List <Tuple <long, long> >();
foreach (Tuple <uint, uint> v in MipMapInfo)
{
var beginoffset = mipmapstream.Position;
var mipoffset = v.Item1;
var mipZsize = v.Item2;
using (var temp_vs = file.CreateViewStream((mipoffset), mipZsize, MemoryMappedFileAccess.Read))
{
new ZlibStream(temp_vs, CompressionMode.Decompress).CopyTo(mipmapstream);
}
mipmapoffsets.Add(new Tuple <long, long>(beginoffset, mipmapstream.Position - beginoffset));
}
//assemble mipmaps
for (int i = 0; i < 6; i++)
{
var offset = 0 + (i * imagestream.Length / 6);
imagereader.BaseStream.Seek(offset, SeekOrigin.Begin);
var facesize = (int)imagestream.Length / 6;
var face = imagereader.ReadBytes(facesize);
output.Write(face, 0, face.Length);
foreach (var o in mipmapoffsets)
{
var mipsize = (o.Item2 / 6);
var moffset = o.Item1 + (i * mipsize);
mipmapreader.BaseStream.Seek(moffset, SeekOrigin.Begin);
var mipmap = mipmapreader.ReadBytes((int)(mipsize));
output.Write(mipmap, 0, mipmap.Length);
}
}
}
}
}
}
