SDL window centering?

[Dy7SLyTq]

I am trying to do two things that i have an issue with finding on google. the first is im trying to center the main window, but i cant figure out how to do it.
secondly i want to make it full screen but the flag for setvideomode doesnt work. is there another way?

[Peter87]

To center the window you can do

SDL_putenv("SDL_VIDEO_CENTERED=center");

before you call SDL_SetVideoMode.

Unfortunately this use the POSIX function putenv (if available) that takes a non-const char* as argument despite that the documentation say SDL_putenv takes const char* so this could generate a warning or error depending on the compiler.

To avoid that I guess you better store it inside a local array first so that you can pass a non-const char*.

char center_env[] = "SDL_VIDEO_CENTERED=center";
SDL_putenv(center_env);

Make sure that the fullscreen dimensions are supported. You can use SDL_VideoModeOK to test one specific, or use SDL_ListModes to get a list of supported fullscreen dimensions.
http://www.libsdl.org/cgi/docwiki.fcg/SDL_VideoModeOK
http://www.libsdl.org/cgi/docwiki.fcg/SDL_ListModes