Christian,

Boost is very widely accepted and utilized by game developers, and on the web GameDev.net there are many many articles about various boost sub lib. But I haven't seen many discussions about SDL lib on this boost mail list from boost users/developers. SDL is very convenient cross-platform C++ development platform that can be used not only game developers but also by other developers. It has easy-to-use classes of multithreads, mutex, event queues, timer callbacks, semaphores, key board input handling, audio, video, to name a few. Most of these functionalities are available from Boost lib. But I haven't seen good timer callback available from Boost lib (anybody can correct me if I am not so informed of Boost timer).

I tried to extract the timer functions (classes) from the SDL lib into an individual timer lib, and the work is still in progress. I am not sure other users in the list are interested in knowing about porting SDL timer to Boost. So if you can tell me your email of this email list, I can send you the project file.

What exactly I did was that I included the relevant source files from SDL package, and compile it with testing program. I was able to get the exe file but the project also generated a library file in addition to the exe file. I am confused by the fact that the project generating TimerTest.lib, that I don't want t. Rather, I wanted to link them with TimerTest not intended to. I checked the project configuration file, and there is no setting that will generate a library file. I think it might be set in the program source code, but I did not find it.

I am interested in your idea of implement SDL wrapper in boost lib. Thank you!

Best regards, Fanzhe Cui +++++++++++++++++++++++++++ Goldiom Systems LLC - Information and Communication Technology Provider Email: fanzhe.cui@goldiom.com Tel: 973-210-4254 www.goldiom.com

-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Christian Henning Sent: Wednesday, June 06, 2007 10:06 AM To: boost-users@lists.boost.org Subject: Re: [Boost-users] port of GameDev SDL lib in Boost?

Fanzhe, I have been working on a sdl wrapper for boost::gil. It lets you draw on a canvas and react to event such as a timer event. I was thinking of outsourcing this portion so people can use just that. The good thing is the sdl is supporting almost the same platforms as boost does. The bad thing probably is the license sdl is using, LGPL.

If you want I can give you a pointer for the code.

Christian

On 6/6/07, fanzhe cui wrote:

...

Yes, I was referring to that library and more info could be found from

Your version of the timer wrapper is quite similar to mine: class CallbackTimer { public: ~CallbackTimer(); CallbackTimer(); uint32 getTick(); RTS_TimerID addTimer(Uint32 interval, RTS_Callback callback, void* param); bool removeTimer(RTS_TimerID timrId); bool delay(Uint32 interval); bool setTick(Uint32 interval); bool resetTick(); static Uint32 SDLCALL Ticktock(Uint32 interval); private: static int _Ticks; int init(); int quit(); SDL_mutex *_mut; }; Yours is also class template, which would make it convenient to use. It would be useful if you have separate member function add_timer()/remove_timer(). I noticed that you embedded SDL_AddTimer() in your set_timer() function. In addition I suggest you having a member function delay() as well. It is because win32 has Sleep() and Linux has different function for sleep, and we need an unified one across different platforms, and this is good place to do so. In the case you want to implement only the timer, it might be worth replace other parts with boost library - for example using boost mutex rather than the mutex in SDL, which I plan to do as next step. The reason I wanted to do this is because I noticed SDL used WinMain() function, although in the case of the timer I don't need to use WinMain(). Best regards, Fanzhe Cui ++++++++++++++++++++++++++++++++++++++ Goldiom Systems LLC - Information and Communication Technology Provider Email: fanzhe.cui@goldiom.com Tel: 973-210-4254 www.goldiom.com -----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Christian Henning Sent: Thursday, June 07, 2007 9:56 AM To: boost-users@lists.boost.org Subject: Re: [Boost-users] port of GameDev SDL lib in Boost? My current version is more or less ready to use. you can check it here: http://gil-contributions.googlecode.com/svn/trunk/gil_2/boost/gil/extension/ sdl Let me know what you think. I'm not so sure if you can put your callback timer under the boost license. Maybe somebody else knows the answer. Christian On 6/6/07, fanzhe cui wrote: the

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web: http://www.libsdl.org/. The problem with the boost timer that you mentioned is that it provides the time elapsed, but not the interface like provided by SDL lib. Particularly the kind of timer callback function that is available in SDL lib is not available in Boost lit.

Best regards, Fanzhe Cui

++++++++++++++++++++++ Goldiom Systems LLC - Information and Communication Technology Provider Email: fanzhe.cui@goldiom.com Tel: 973-210-4254 www.goldiom.com

-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Tarjei Knapstad Sent: Wednesday, June 06, 2007 4:02 AM To: boost-users@lists.boost.org Subject: Re: [Boost-users] port of GameDev SDL lib in Boost?

...

I have been using both Boost lib and GameDev SDL lib in same projects. Both of the lib have very good platform independency. But they have some functionalities overlapping each other and I would like to use only one of them. The timer lib in GameDev SDL is very easy to use and I hope such

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or functionally similar one exists in Boost lib. I had a look at boost archive on previous discussion on implementing Boost timers and feel

On 6/6/07, fanzhe cui wrote: lib that

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there is still no good implementation of timer in Boost lib (correct me if I am wrong). Anybody in this email list had a look at GameDev timer and have considered implementing such a lib in Boost?

Are you referring to the Simple Direct Medialayer?

http://lazyfoo.net/SDL_tutorials/lesson12/index.php

What's wrong with/missing in boost::timer ?

http://boost.org/libs/timer/index.html

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