byte[] ReadEntry(CatEntry e)
{
_datStream.Seek(e.OrigStreamPos, SeekOrigin.Begin);
var data = new byte[e.OrigSize];
_datStream.Read(data, 0, (int)e.OrigSize);
return(data);
}
private bool DoReduceDDS(CatEntry e, TextureEntry.TECategory cat, long pos, int levels, Res res)
{
var oldData = new byte[e.OrigSize];
_datStream.Seek(pos, SeekOrigin.Begin);
_datStream.Read(oldData, 0, oldData.Length);
bool replaced = false;
var h = new GCHandle();
try
{
if (e.Compressed)
{
oldData = Decompress(oldData);
}
h = GCHandle.Alloc(oldData, GCHandleType.Pinned);
var img = DirectXTexNet.TexHelper.Instance.LoadFromDDSMemory(
h.AddrOfPinnedObject(),
oldData.Length,
DirectXTexNet.DDS_FLAGS.NONE);
var imgCount = img.GetImageCount();
if (imgCount > 1)
{
for (int i = 0; i < Math.Min(imgCount - 1, levels); ++i)
{
img.FreeFirstImage(); // TODO: replace loop
}
var ufs = img.SaveToDDSMemory(DirectXTexNet.DDS_FLAGS.NONE);
var newData = new byte[ufs.Length];
ufs.Read(newData, 0, newData.Length);
res.RemovedBytes += oldData.LongLength - newData.LongLength;
++res.Count;
replaced = true;
e.Data = e.Compressed ? Compress(newData) : newData;
}
}
catch (Exception ex)
{
throw new IOException(string.Format("Category: {0}, Path: {1}", cat, e.Path), ex);
}
finally
{
if (h.IsAllocated)
{
h.Free();
}
}
return(replaced);
}
static private string GetChecksum(CatEntry e)
{
using (var alg = System.Security.Cryptography.MD5.Create())
{
byte[] hash = alg.ComputeHash(e.Data);
var sb = new StringBuilder();
for (int i = 0; i < hash.Length; i++)
{
sb.Append(hash[i].ToString("x2"));
}
return(sb.ToString());
}
}
private List <CatEntry> ParseCat(List <string> lines)
{
var sep = new char[] { ' ' };
var list = new List <CatEntry>(lines.Count);
long currentPos = 0;
foreach (var l in lines)
{
var entry = new CatEntry();
var sl = l.Split(sep, StringSplitOptions.RemoveEmptyEntries);
if (sl.Length != 4)
{
entry.ChkSum = sl[sl.Length - 1];
entry.TimeStamp = sl[sl.Length - 2];
entry.OrigSize = long.Parse(sl[sl.Length - 3]); // let exception propagate
entry.Path = sl[0];
for (int i = 1; i < sl.Length - 3; ++i)
{
entry.Path += string.Format(" {0}", sl[i]);
}
}
else
{
entry.Path = sl[0];
entry.OrigSize = long.Parse(sl[1]); // let exception propagate
entry.TimeStamp = sl[2];
entry.ChkSum = sl[3];
}
entry.OrigStreamPos = currentPos;
entry.Compressed = entry.Path.EndsWith(".gz");
currentPos += entry.OrigSize;
list.Add(entry);
}
return(list);
}
