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<HTML
><HEAD
><TITLE
>General</TITLE
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><H1
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>Chapter 5. General</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="sdlinit.html"
>SDL_Init</A
> -- Initializes SDL</DT
><DT
><A
HREF="sdlinitsubsystem.html"
>SDL_InitSubSystem</A
> -- Initialize subsystems</DT
><DT
><A
HREF="sdlquitsubsystem.html"
>SDL_QuitSubSystem</A
> -- Shut down a subsystem</DT
><DT
><A
HREF="sdlquit.html"
>SDL_Quit</A
> -- Shut down SDL</DT
><DT
><A
HREF="sdlwasinit.html"
>SDL_WasInit</A
> -- Check which subsystems are initialized</DT
><DT
><A
HREF="sdlgeterror.html"
>SDL_GetError</A
> -- Get SDL error string</DT
><DT
><A
HREF="sdlenvvars.html"
>SDL_envvars</A
> -- SDL environment variables</DT
></DL
></DIV
><P
>Before SDL can be used in a program it must be initialized with <A
HREF="sdlinit.html"
><TT
CLASS="FUNCTION"
>SDL_Init</TT
></A
>. <TT
CLASS="FUNCTION"
>SDL_Init</TT
> initializes all the subsystems that the user requests (video, audio, joystick, timers and/or cdrom). Once SDL is initialized with <TT
CLASS="FUNCTION"
>SDL_Init</TT
> subsystems can be shut down and initialized as needed using <A
HREF="sdlinitsubsystem.html"
><TT
CLASS="FUNCTION"
>SDL_InitSubSystem</TT
></A
> and <A
HREF="sdlquitsubsystem.html"
><TT
CLASS="FUNCTION"
>SDL_QuitSubSystem</TT
></A
>.</P
><P
>SDL must also be shut down before the program exits to make sure it cleans up correctly. Calling <A
HREF="sdlquit.html"
><TT
CLASS="FUNCTION"
>SDL_Quit</TT
></A
> shuts down all subsystems and frees any resources allocated to SDL.</P
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