[SDL] Need some help: cross platform resource loading(Windows/Linux/OSX)...

[Holmes Futrell]

Hi Jesse,

My primary experience is with Mac OS X, so let me comment on that.

On Mac OS X, executables and their related resources are typically  
grouped together into application "bundles".  These bundles are just  
special folders, but they appear as applications to users (who can  
double click them to launch them).  In XCode you can add a resource to  
the application bundle by placing it under the "resources" grouping in  
the side bar.  After compilation, XCode will place the resource into  
the Contents/Resources directory of the application bundle.

To locate the resources within the bundle you can use the Objective-C  
class NSBundle or you can use CFBundle if you're working in straight  
C.  I guess you could also locate the resources manually within your  
bundle, if you were so inclined.

To make your app look like a "real" Mac OS X application, you should  
keep the executable in an application bundle, but if you'd prefer, you  
could still keep your resources in external folders in the same way  
that you are doing on windows.  Just keep in mind that when you launch  
your Mac OS X application, the current working directory will be the  
executable's directory (which is located within the application  
bundle) rather than the directory of the application bundle.  So on  
Mac OS X you'll have to go through the extra step of changing the  
working directory.  This can be done with chdir or by the following  
method using CFURL and CFBundle:

     CFURLRef resourceURL =   
CFBundleCopyResourcesDirectoryURL(CFBundleGetMainBundle());
     char resourcePath[4096];
     CFURLGetFileSystemRepresentation((__CFURL*)resourceURL, TRUE,  
(UInt8*)resourcePath, 4096);	
     chdir(resourcePath);	
     CFRelease(resourceURL);

- Holmes


On May 22, 2008, at 4:27 AM, Jesse P. wrote:

> Need some help: cross platform resource loading(Windows/Linux/OSX)...
>
>
> Hi,
>
> I wrote an SDL based game for Windows.
>
> I have a friend working on the Linux and Mac OSX version now.
> He is having some difficulty in the porting to these platforms.
>
> Here is a sample of my code:
> *Spritebmp[0] = SDL_LoadBMP("Graphics/Title Screen Graphics/ 
> SimpleDirectmediaLayer_Logo.bmp"); *
>
> The above code is the Windows implementation.
> (on Windows platform, the resources are stored in a folder in the  
> executables folder)
>
> How would we load resources on Linux and Mac OSX platforms ?
> (solution must work on Windows, Linux, and Max OSX platforms)
>
> Thanks in advanced!
>
>
> PS - This is the game:
> http://www.silentheroproductions.com/games_pc_windows_lettersfall_100percent.htm
>
>
>
> Jesse "JeZ+Lee"
> slnthero at aol.com
> Silent Hero Productions(R)
> http://www.SilentHeroProductions.com
>
> _______________________________________________
> SDL mailing list
> SDL at lists.libsdl.org
> http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

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