read stream to unmanaged memory

[ZejulioZ]

Is there any ways to read directly and rapidly from a stream to an unmanaged buffer ( IntPtr or byte* ) without having to do a convertion from the byte[] to the IntPtr through Marshal.Copy method ? More clearly, I want to avoid this Marshal.Copy : byte[] b = new byte[1024]; int size = theStream.Read(b, 0, 1024); IntPtr bufferPtr = Marshal.AllocHGlobal(size); Marshal.Copy(b, 0, bufferPtr, size); Apparently there is a UnmanagedMemoryStream class coming along with winFx doing the job, but I'm looking for something usable with the framework 1.1 Thanks a lot, Julien.

[leppie]

Here is an example of how I load a memory font from resources: PrivateFontCollection col = new PrivateFontCollection(); Stream fontStream = GetType().Assembly.GetManifestResourceStream("somefont.ttf"); byte[] fontdata = new byte[fontStream.Length]; fontStream.Read(fontdata,0,(int)fontStream.Length); fontStream.Close(); GCHandle gc = GCHandle.Alloc(fontdata, GCHandleType.Pinned); col.AddMemoryFont(gc.AddrOfPinnedObject(),fontdata.Length); gc.Free(); xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots

[ZejulioZ]

That's interesting. Do you know what is actually GCHandle.AddrOfPinnedObject doing behind ? Because I'm not sure C# arrays are contiguous like C/C++ arrays are. And I profit to ask you; have you compared both methods efficiency ( GCHandle / standard Marshal.Copy ) ? Thanks for the hint anyway :D Julien

[leppie]

ZejulioZ wrote: Because I'm not sure C# arrays are contiguous like C/C++ arrays are. If you pinned it, they are :) ZejulioZ wrote: And I profit to ask you; have you compared both methods efficiency ( GCHandle / standard Marshal.Copy ) ? Sorry cant help you there... xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots