[Mono-devel-list] mono SDL linux/win32 SDL.DLL - my brain hurts!

[ted leslie]

I got it working on the really old SDL.NET package that had Make/Build support for Mono,
I needed to put up the SDL-Dev libs too !! arggh!!! :(

But still, i'd love to be able to get a recent  (this year) build for SDL.NET working,
as it looks really different (the new one) then the older one.

Also if anyone could write a small, or "point to" a resource talking to the:
"How you write a wrapper in C#/Mono/Linux to wrap a standard library in linux"
that would be appreciated.

and if someone could build the latest SDL.NET and post it somewhere that would be very much appreciated as well.

-tl


On Thu, Jul 21, 2005 at 03:36:48PM +1200, David Mitchell wrote:
> Try this:
> 
> http://prdownloads.sourceforge.net/cs-sdl/SdlDotNet-3.1.2-1.zip?download
> 
> Looks like the latest linux version to me.
> 
> David
> 
> ted leslie wrote:
> >(After my preamble, I am essentially asking .. how does a wrapper to 
> >.Net/Mono work .....)
> >
> >There must not be to many people writting cross platform apps
> >that need sound? Searching for sound (audio, mp3, sound) on 
> >mono-project.com via mail list, etc
> >returns almost nothing.
> >
> >Anyways I came across SDL on the Resources page!!!! wow!!! this will solve 
> >my problems!
> >
> >I go to   cs-sdl.sourceforge.net
> >and check it out, 
> >It has SDL.NET for Win32 and Linux (mono is supported, it says)
> >So i download the support libraries for SDL.NET which are the traditional 
> >SDL libs .. put them on Win32 and updated
> >my ones on my Suse box.
> >I ran the Examples just fine on Win32
> >
> >Now on to Linux and Mono ...............
> >
> >First off the latest SDL.NET downloads on sourceforge seem to be for Win32 
> >only (as an aside they have a nice installer that does everything for you 
> >on the Win32 side of things)
> >
> >So i dig back a COUPLE years and get a gz file (of SDL.NET) that has linux 
> >support
> >	(incidently i see screen caps in SDL.NET project page of SDL apps 
> >	running on linux so even thought
> >		the linux support in the project seems old, it infact looks 
> >		like it run and works)
> >
> >I build the SDL.NET on Linux (using latest stable release Mono), but there 
> >is an error in the Makefile,
> >the pathing slash is of the windows variety (hmmmmm...?), so i fix that 
> >and Makefile the SDL.NET DLL's
> >and the examples.
> >
> >The Examples compile/build fine but the give a Mono runtime error that 
> >they can't
> >find System DLL:SDL.dll
> >
> >
> >>--An exception was thrown by the type initializer for SdlDotNet.Music 
> >>---> System.DllNotFoundException: SDL.dll
> >
> >
> >So this is were I hit a dead end because I don't know anything about 
> >.Net/C# wrappers to traditional C based libraries on Linux.
> >I looked at the gtk-sharp wrapper (cause i know it works), I see a mixer 
> >of C and CS files and traditional
> >gcc references in makefiles, but basically it looks like a big job to 
> >figure out gtk-sharp's process of a wrapper.
> >
> >On that note, is there a doucmentation section somewhere on that - i.e. 
> >building wrappers?
> >
> >To me, I am thinking in the end SDL.NET has to get hold of the routines in 
> >the
> >SDL ".so" file right? 
> >how does that happen? I know how it happens in a traditional C/gcc 
> >compile, link, create a .so file, and compile your apps with dynamic 
> >support againt the ".so" ....  what bit of magic get Mono to see/do that 
> >(with its wrapper)?
> >
> >I check around the SDL.NET code and see in the Natives.cs file this:
> >
> >                const string SDL_DLL = "SDL";
> >                const string MIX_DLL = "SDL_mixer";
> >                // General
> >                [DllImport(SDL_DLL, 
> >                CallingConvention=CallingConvention.Cdecl), 
> >                SuppressUnmanagedCodeSecurity]
> >                public static extern int SDL_Init(int flags);
> >
> >which I am thinking is pretty key to the process ...
> >but why reference   SDL.DLL  ... I don't have that on Linux, thats on 
> >Win32.
> >
> >Anyone shed light?
> >
> >Also, would it be a hard job making the same wrapper to the SDL lib on 
> >MAC-OSX to complete a good cross-platfrom
> >SDL.NET class for Mono ? 
> >
> >-tl
> > 
> >
> >
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> >
> >
> 
> 
> -- 
> David Mitchell
> Software Engineer
> Telogis
> 
>