Re: Palette Quantization without unsafe code
From: Bob Powell [MVP] (bob_at__spamkiller_bobpowell.net)
Date: 08/11/04
- Next message: smartkid: "need Dispose?"
- Previous message: Stoitcho Goutsev \(100\) [C# MVP]: "Re: Error creating window handle"
- In reply to: MattB: "Re: Palette Quantization without unsafe code"
- Messages sorted by: [ date ] [ thread ]
Date: Wed, 11 Aug 2004 16:06:52 +0200
There's a difference between unsafe code which enables C# programs to access
memory directly via pointers and marshaling between managed and unmanaged
memory.
The Marshal class is the correct way to access unmanaged memory locations
from managed code and is suitable for any .net language, not just C#.
You may be confused over the issue of garbage collection. The ability of
Marshal to access unmanaged memory does not make that memory managed or
cause it to become subject to garbage-collection. Marshal itself is subject
to garbage collection but it can access any memory, even that which isn't
subject to GC control.
-- Bob Powell [MVP] Visual C#, System.Drawing The Image Transition Library wraps up and LED style instrumentation is available in the June of Well Formed for C# or VB programmers http://www.bobpowell.net/currentissue.htm Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/gdiplus_faq.htm The GDI+ FAQ RSS feed: http://www.bobpowell.net/faqfeed.xml Windows Forms Tips and Tricks RSS: http://www.bobpowell.net/tipstricks.xml Bob's Blog: http://bobpowelldotnet.blogspot.com/atom.xml "MattB" <MBaskey2002@yahoo.co.uk> wrote in message news:b4a90122.0408110054.7c3669a9@posting.google.com... > As I understand it using the Marshall class is essentially doing > unmanaged code. Is the code I write using Marshall have the benefits > of safe, managed code, such as garbage collection, etc? > > Thanks, > Matt > > > "Bob Powell [MVP]" <bob@_spamkiller_bobpowell.net> wrote in message news:<eraioZxfEHA.140@TK2MSFTNGP12.phx.gbl>... > > The unsafe code is a lazy way of doing it and very convenient for old C++ > > programmers. Anything you can do in unsafe code can be done with the Marshal > > class anyway. > > > > Take a look at the GDI+ FAQ. It has examples where C# uses unsafe code and > > the VB uses the Marshal class. Just google on my site for "Marshal." > > > > -- > > Bob Powell [MVP] > > Visual C#, System.Drawing > > > > The Image Transition Library wraps up and LED style instrumentation is > > available in the June of Well Formed for C# or VB programmers > > http://www.bobpowell.net/currentissue.htm > > > > Answer those GDI+ questions with the GDI+ FAQ > > http://www.bobpowell.net/gdiplus_faq.htm > > > > The GDI+ FAQ RSS feed: http://www.bobpowell.net/faqfeed.xml > > Windows Forms Tips and Tricks RSS: http://www.bobpowell.net/tipstricks.xml > > Bob's Blog: http://bobpowelldotnet.blogspot.com/atom.xml > > > > > > > > > > > > > > "MattB" <MBaskey2002@yahoo.co.uk> wrote in message > > news:b4a90122.0408100838.3da845c6@posting.google.com... > > > I have seen > > > http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q319061 > > > and > > > > > http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspp/html/colorquant.asp > > > > > > Is there anyway to do this without unsafe code??? > > > > > > > > > Thanks, > > > Matt
- Next message: smartkid: "need Dispose?"
- Previous message: Stoitcho Goutsev \(100\) [C# MVP]: "Re: Error creating window handle"
- In reply to: MattB: "Re: Palette Quantization without unsafe code"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
