📄 sdlvideomodeok.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_VideoModeOK</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="SDL Library Documentation"HREF="index.html"><LINKREL="UP"TITLE="Video"HREF="video.html"><LINKREL="PREVIOUS"TITLE="SDL_ListModes"HREF="sdllistmodes.html"><LINKREL="NEXT"TITLE="SDL_SetVideoMode"HREF="sdlsetvideomode.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="sdllistmodes.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="sdlsetvideomode.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="SDLVIDEOMODEOK"></A>SDL_VideoModeOK</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN1202"></A><H2>Name</H2>SDL_VideoModeOK&nbsp;--&nbsp;Check to see if a particular video mode is supported.</DIV><DIVCLASS="REFSYNOPSISDIV"><ANAME="AEN1205"></A><H2>Synopsis</H2><DIVCLASS="FUNCSYNOPSIS"><ANAME="AEN1206"></A><P></P><PRECLASS="FUNCSYNOPSISINFO">#include "SDL.h"</PRE><P><CODE><CODECLASS="FUNCDEF">int <BCLASS="FSFUNC">SDL_VideoModeOK</B></CODE>(int width, int height, int bpp, Uint32 flags);</CODE></P><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN1212"></A><H2>Description</H2><P><TTCLASS="FUNCTION">SDL_VideoModeOK</TT> returns <SPANCLASS="RETURNVALUE">0</SPAN> if the requested mode is not supported under any bit depth, or returns the bits-per-pixel of the closest available mode with the given width, height and requested <AHREF="sdlsurface.html">surface</A> flags (see <AHREF="sdlsetvideomode.html"><TTCLASS="FUNCTION">SDL_SetVideoMode</TT></A>).</P><P>The bits-per-pixel value returned is only a suggested mode. You can usually request and bpp you want when <AHREF="sdlsetvideomode.html">setting</A>  the video mode and SDL will emulate that color depth with a shadow video surface.</P><P>The arguments to <TTCLASS="FUNCTION">SDL_VideoModeOK</TT> are the same ones you would pass to <AHREF="sdlsetvideomode.html">SDL_SetVideoMode</A></P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN1225"></A><H2>Example</H2><PRECLASS="PROGRAMLISTING">SDL_Surface *screen;Uint32 bpp;...printf("Checking mode 640x480@16bpp.\n");bpp=SDL_VideoModeOK(640, 480, 16, SDL_HWSURFACE);if(!bpp){  printf("Mode not available.\n");  exit(-1);}printf("SDL Recommends 640x480@%dbpp.\n", bpp);screen=SDL_SetVideoMode(640, 480, bpp, SDL_HWSURFACE);..</PRE></DIV><DIVCLASS="REFSECT1"><ANAME="AEN1228"></A><H2>See Also</H2><P><AHREF="sdlsetvideomode.html"><TTCLASS="FUNCTION">SDL_SetVideoMode</TT></A>,<AHREF="sdlgetvideoinfo.html"><TTCLASS="FUNCTION">SDL_GetVideoInfo</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="sdllistmodes.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="sdlsetvideomode.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">SDL_ListModes</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="video.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">SDL_SetVideoMode</TD></TR></TABLE></DIV></BODY></HTML>
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