📄 sdlwasinit.html

📁 VC5.6.7的一个扩展库。跟DirectX的功能差不多。
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<HTML><HEAD><TITLE>SDL_WasInit</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="SDL Library Documentation"HREF="index.html"><LINKREL="UP"TITLE="General"HREF="general.html"><LINKREL="PREVIOUS"TITLE="SDL_Quit"HREF="sdlquit.html"><LINKREL="NEXT"TITLE="SDL_GetError"HREF="sdlgeterror.html"></HEAD><BODYCLASS="REFENTRY"BGCOLOR="#FFF8DC"TEXT="#000000"LINK="#0000ee"VLINK="#551a8b"ALINK="#ff0000"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">SDL Library Documentation</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="sdlquit.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="sdlgeterror.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="SDLWASINIT"></A>SDL_WasInit</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN617"></A><H2>Name</H2>SDL_WasInit&nbsp;--&nbsp;Check which subsystems are initialized</DIV><DIVCLASS="REFSYNOPSISDIV"><ANAME="AEN620"></A><H2>Synopsis</H2><DIVCLASS="FUNCSYNOPSIS"><ANAME="AEN621"></A><P></P><PRECLASS="FUNCSYNOPSISINFO">#include "SDL.h"</PRE><P><CODE><CODECLASS="FUNCDEF">Uint32 <BCLASS="FSFUNC">SDL_WasInit</B></CODE>(Uint32 flags);</CODE></P><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN627"></A><H2>Description</H2><P><TTCLASS="FUNCTION">SDL_WasInit</TT> allows you to see which SDL subsytems have been <AHREF="sdlinit.html">initialized</A>. <TTCLASS="PARAMETER"><I>flags</I></TT> is a bitwise OR'd combination of the subsystems you wish to check (see <AHREF="sdlinit.html"><TTCLASS="FUNCTION">SDL_Init</TT></A> for a list of subsystem flags).</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN635"></A><H2>Return Value</H2><P><TTCLASS="FUNCTION">SDL_WasInit</TT> returns a bitwised OR'd combination of the initialized subsystems.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN639"></A><H2>Examples</H2><PRECLASS="PROGRAMLISTING">&#13;/* Here are several ways you can use SDL_WasInit() *//* Get init data on all the subsystems */Uint32 subsystem_init;subsystem_init=SDL_WasInit(SDL_INIT_EVERYTHING);if(subsystem_init&#38;SDL_INIT_VIDEO)  printf("Video is initialized.\n");else  printf("Video is not initialized.\n");/* Just check for one specfic subsystem */if(SDL_WasInit(SDL_INIT_VIDEO)!=0)  printf("Video is initialized.\n");else  printf("Video is not initialized.\n");/* Check for two subsystems */Uint32 subsystem_mask=SDL_INIT_VIDEO|SDL_INIT_AUDIO;if(SDL_WasInit(subsystem_mask)==subsystem_mask)  printf("Video and Audio initialized.\n");else  printf("Video and Audio not initialized.\n");&#13;</PRE></DIV><DIVCLASS="REFSECT1"><ANAME="AEN642"></A><H2>See Also</H2><P><AHREF="sdlinit.html"><TTCLASS="FUNCTION">SDL_Init</TT></A>,<AHREF="sdlinitsubsystem.html"><TTCLASS="FUNCTION">SDL_Subsystem</TT></A></P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="sdlquit.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="index.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="sdlgeterror.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">SDL_Quit</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="general.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">SDL_GetError</TD></TR></TABLE></DIV></BODY></HTML>
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