distrib/sdl-1.2.15/docs/html/sdlsetvideomode.html - emulator-unstable-refactoring - Git at Google

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 ><H1
 ><A
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 ></A
 >SDL_SetVideoMode</H1
 ><DIV
 CLASS="REFNAMEDIV"
 ><A
 NAME="AEN1239"
 ></A
 ><H2
 >Name</H2
 >SDL_SetVideoMode&nbsp;--&nbsp;Set up a video mode with the specified width, height and bits-per-pixel.</DIV
 ><DIV
 CLASS="REFSYNOPSISDIV"
 ><A
 NAME="AEN1242"
 ></A
 ><H2
 >Synopsis</H2
 ><DIV
 CLASS="FUNCSYNOPSIS"
 ><A
 NAME="AEN1243"
 ></A
 ><P
 ></P
 ><PRE
 CLASS="FUNCSYNOPSISINFO"
 >#include "SDL.h"</PRE
 ><P
 ><CODE
 ><CODE
 CLASS="FUNCDEF"
 >SDL_Surface *<B
 CLASS="FSFUNC"
 >SDL_SetVideoMode</B
 ></CODE
 >(int width, int height, int bpp, Uint32 flags);</CODE
 ></P
 ><P
 ></P
 ></DIV
 ></DIV
 ><DIV
 CLASS="REFSECT1"
 ><A
 NAME="AEN1249"
 ></A
 ><H2
 >Description</H2
 ><P
 >Set up a video mode with the specified width, height and bits-per-pixel.</P
 ><P
 >If <TT
 CLASS="PARAMETER"
 ><I
 >bpp</I
 ></TT
 > is 0, it is treated as the
 current display bits per pixel.</P
 ><P
 >The <TT
 CLASS="PARAMETER"
 ><I
 >flags</I
 ></TT
 > parameter is the same as the <TT
 CLASS="STRUCTFIELD"
 ><I
 >flags</I
 ></TT
 > field of the <A
 HREF="sdlsurface.html"
 ><SPAN
 CLASS="STRUCTNAME"
 >SDL_Surface</SPAN
 ></A
 > structure. OR'd combinations of the following values are valid.</P
 ><DIV
 CLASS="INFORMALTABLE"
 ><A
 NAME="AEN1259"
 ></A
 ><P
 ></P
 ><TABLE
 BORDER="1"
 CLASS="CALSTABLE"
 ><TBODY
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_SWSURFACE</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >Create the video surface in system memory</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_HWSURFACE</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >Create the video surface in video memory</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_ASYNCBLIT</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >Enables the use of asynchronous updates of the display surface. This will
 usually slow down blitting on single CPU machines, but may provide a speed
 increase on SMP systems.</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_ANYFORMAT</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >Normally, if a video surface of the requested bits-per-pixel (<TT
 CLASS="PARAMETER"
 ><I
 >bpp</I
 ></TT
 >) is not available, SDL will emulate one with a shadow surface. Passing <TT
 CLASS="LITERAL"
 >SDL_ANYFORMAT</TT
 > prevents this and causes SDL to use the video surface, regardless of its pixel depth.</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_HWPALETTE</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >Give SDL exclusive palette access. Without this flag you may not always get the the colors you request with <A
 HREF="sdlsetcolors.html"
 ><TT
 CLASS="FUNCTION"
 >SDL_SetColors</TT
 ></A
 > or <A
 HREF="sdlsetpalette.html"
 ><TT
 CLASS="FUNCTION"
 >SDL_SetPalette</TT
 ></A
 >.</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_DOUBLEBUF</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >Enable hardware double buffering; only valid with SDL_HWSURFACE. Calling
 <A
 HREF="sdlflip.html"
 ><TT
 CLASS="FUNCTION"
 >SDL_Flip</TT
 ></A
 > will flip the
 buffers and update the screen. All drawing will take place on the surface
 that is not displayed at the moment. If double buffering could not be enabled
 then <TT
 CLASS="FUNCTION"
 >SDL_Flip</TT
 > will just perform a
 <A
 HREF="sdlupdaterect.html"
 ><TT
 CLASS="FUNCTION"
 >SDL_UpdateRect</TT
 ></A
 >
 on the entire screen.</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_FULLSCREEN</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >SDL will attempt to use a fullscreen mode. If a hardware resolution change is
 not possible (for whatever reason), the next higher resolution will be used and
 the display window centered on a black background.</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_OPENGL</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >Create an OpenGL rendering context. You should have previously set OpenGL video attributes with <A
 HREF="sdlglsetattribute.html"
 ><TT
 CLASS="FUNCTION"
 >SDL_GL_SetAttribute</TT
 ></A
 >.</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_OPENGLBLIT</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >Create an OpenGL rendering context, like above, but allow normal blitting
 operations. The screen (2D) surface may have an alpha channel, and
 <A
 HREF="sdlupdaterects.html"
 ><TT
 CLASS="FUNCTION"
 >SDL_UpdateRects</TT
 ></A
 >
 must be used for updating changes to the screen surface. NOTE: This option
 is kept for compatibility only, and is <SPAN
 CLASS="emphasis"
 ><I
 CLASS="EMPHASIS"
 >not</I
 ></SPAN
 > recommended for
 new code.</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_RESIZABLE</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >Create a resizable window. When the window is resized by the user a <A
 HREF="sdlresizeevent.html"
 ><TT
 CLASS="LITERAL"
 >SDL_VIDEORESIZE</TT
 ></A
 > event is generated and <TT
 CLASS="FUNCTION"
 >SDL_SetVideoMode</TT
 > can be called again with the new size.</TD
 ></TR
 ><TR
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 ><TT
 CLASS="LITERAL"
 >SDL_NOFRAME</TT
 ></TD
 ><TD
 ALIGN="LEFT"
 VALIGN="TOP"
 >If possible, <TT
 CLASS="LITERAL"
 >SDL_NOFRAME</TT
 > causes SDL to create a window with no title bar or frame decoration. Fullscreen modes automatically have this flag set.</TD
 ></TR
 ></TBODY
 ></TABLE
 ><P
 ></P
 ></DIV
 ><DIV
 CLASS="NOTE"
 ><BLOCKQUOTE
 CLASS="NOTE"
 ><P
 ><B
 >Note: </B
 >Whatever <TT
 CLASS="PARAMETER"
 ><I
 >flags</I
 ></TT
 > <TT
 CLASS="FUNCTION"
 >SDL_SetVideoMode</TT
 > could satisfy are set in the <TT
 CLASS="STRUCTFIELD"
 ><I
 >flags</I
 ></TT
 > member of the returned surface.</P
 ></BLOCKQUOTE
 ></DIV
 ><DIV
 CLASS="NOTE"
 ><BLOCKQUOTE
 CLASS="NOTE"
 ><P
 ><B
 >Note: </B
 >The <TT
 CLASS="PARAMETER"
 ><I
 >bpp</I
 ></TT
 > parameter is the number of bits per pixel,
 so a <TT
 CLASS="PARAMETER"
 ><I
 >bpp</I
 ></TT
 > of 24 uses the packed representation of
 3 bytes/pixel. For the more common 4 bytes/pixel mode, use a
 <TT
 CLASS="PARAMETER"
 ><I
 >bpp</I
 ></TT
 > of 32. Somewhat oddly, both 15 and 16 will
 request a 2 bytes/pixel mode, but different pixel formats.</P
 ></BLOCKQUOTE
 ></DIV
 ></DIV
 ><DIV
 CLASS="REFSECT1"
 ><A
 NAME="AEN1336"
 ></A
 ><H2
 >Return Value</H2
 ><P
 >The framebuffer surface, or <SPAN
 CLASS="RETURNVALUE"
 >NULL</SPAN
 > if it fails.
 The surface returned is freed by SDL_Quit() and should nt be freed by
 the caller.</P
 ></DIV
 ><DIV
 CLASS="REFSECT1"
 ><A
 NAME="AEN1340"
 ></A
 ><H2
 >See Also</H2
 ><P
 ><A
 HREF="sdllocksurface.html"
 ><TT
 CLASS="FUNCTION"
 >SDL_LockSurface</TT
 ></A
 >,
 <A
 HREF="sdlsetcolors.html"
 ><TT
 CLASS="FUNCTION"
 >SDL_SetColors</TT
 ></A
 >,
 <A
 HREF="sdlflip.html"
 ><TT
 CLASS="FUNCTION"
 >SDL_Flip</TT
 ></A
 >,
 <A
 HREF="sdlsurface.html"
 ><SPAN
 CLASS="STRUCTNAME"
 >SDL_Surface</SPAN
 ></A
 ></P
 ></DIV
 ><DIV
 CLASS="NAVFOOTER"
 ><HR
 ALIGN="LEFT"
 WIDTH="100%"><TABLE
 SUMMARY="Footer navigation table"
 WIDTH="100%"
 BORDER="0"
 CELLPADDING="0"
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 ><TR
 ><TD
 WIDTH="33%"
 ALIGN="left"
 VALIGN="top"
 ><A
 HREF="sdlvideomodeok.html"
 ACCESSKEY="P"
 >Prev</A
 ></TD
 ><TD
 WIDTH="34%"
 ALIGN="center"
 VALIGN="top"
 ><A
 HREF="index.html"
 ACCESSKEY="H"
 >Home</A
 ></TD
 ><TD
 WIDTH="33%"
 ALIGN="right"
 VALIGN="top"
 ><A
 HREF="sdlupdaterect.html"
 ACCESSKEY="N"
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 ></TD
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 ><TR
 ><TD
 WIDTH="33%"
 ALIGN="left"
 VALIGN="top"
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 >Up</A
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 >SDL_UpdateRect</TD
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 >
	<HTML
	><HEAD
	><TITLE
	>SDL_SetVideoMode</TITLE
	><META
	NAME="GENERATOR"
	CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
	"><LINK
	REL="HOME"
	TITLE="SDL Library Documentation"
	HREF="index.html"><LINK
	REL="UP"
	TITLE="Video"
	HREF="video.html"><LINK
	REL="PREVIOUS"
	TITLE="SDL_VideoModeOK"
	HREF="sdlvideomodeok.html"><LINK
	REL="NEXT"
	TITLE="SDL_UpdateRect"
	HREF="sdlupdaterect.html"></HEAD
	><BODY
	CLASS="REFENTRY"
	BGCOLOR="#FFF8DC"
	TEXT="#000000"
	LINK="#0000ee"
	VLINK="#551a8b"
	ALINK="#ff0000"
	><DIV
	CLASS="NAVHEADER"
	><TABLE
	SUMMARY="Header navigation table"
	WIDTH="100%"
	BORDER="0"
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	>SDL Library Documentation</TH
	></TR
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	WIDTH="10%"
	ALIGN="left"
	VALIGN="bottom"
	><A
	HREF="sdlvideomodeok.html"
	ACCESSKEY="P"
	>Prev</A
	></TD
	><TD
	WIDTH="80%"
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	WIDTH="10%"
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	><A
	HREF="sdlupdaterect.html"
	ACCESSKEY="N"
	>Next</A
	></TD
	></TR
	></TABLE
	><HR
	ALIGN="LEFT"
	WIDTH="100%"></DIV
	><H1
	><A
	NAME="SDLSETVIDEOMODE"
	></A
	>SDL_SetVideoMode</H1
	><DIV
	CLASS="REFNAMEDIV"
	><A
	NAME="AEN1239"
	></A
	><H2
	>Name</H2
	>SDL_SetVideoMode -- Set up a video mode with the specified width, height and bits-per-pixel.</DIV
	><DIV
	CLASS="REFSYNOPSISDIV"
	><A
	NAME="AEN1242"
	></A
	><H2
	>Synopsis</H2
	><DIV
	CLASS="FUNCSYNOPSIS"
	><A
	NAME="AEN1243"
	></A
	><P
	></P
	><PRE
	CLASS="FUNCSYNOPSISINFO"
	>#include "SDL.h"</PRE
	><P
	><CODE
	><CODE
	CLASS="FUNCDEF"
	>SDL_Surface *<B
	CLASS="FSFUNC"
	>SDL_SetVideoMode</B
	></CODE
	>(int width, int height, int bpp, Uint32 flags);</CODE
	></P
	><P
	></P
	></DIV
	></DIV
	><DIV
	CLASS="REFSECT1"
	><A
	NAME="AEN1249"
	></A
	><H2
	>Description</H2
	><P
	>Set up a video mode with the specified width, height and bits-per-pixel.</P
	><P
	>If <TT
	CLASS="PARAMETER"
	><I
	>bpp</I
	></TT
	> is 0, it is treated as the
	current display bits per pixel.</P
	><P
	>The <TT
	CLASS="PARAMETER"
	><I
	>flags</I
	></TT
	> parameter is the same as the <TT
	CLASS="STRUCTFIELD"
	><I
	>flags</I
	></TT
	> field of the <A
	HREF="sdlsurface.html"
	><SPAN
	CLASS="STRUCTNAME"
	>SDL_Surface</SPAN
	></A
	> structure. OR'd combinations of the following values are valid.</P
	><DIV
	CLASS="INFORMALTABLE"
	><A
	NAME="AEN1259"
	></A
	><P
	></P
	><TABLE
	BORDER="1"
	CLASS="CALSTABLE"
	><TBODY
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_SWSURFACE</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>Create the video surface in system memory</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_HWSURFACE</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>Create the video surface in video memory</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_ASYNCBLIT</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>Enables the use of asynchronous updates of the display surface. This will
	usually slow down blitting on single CPU machines, but may provide a speed
	increase on SMP systems.</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_ANYFORMAT</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>Normally, if a video surface of the requested bits-per-pixel (<TT
	CLASS="PARAMETER"
	><I
	>bpp</I
	></TT
	>) is not available, SDL will emulate one with a shadow surface. Passing <TT
	CLASS="LITERAL"
	>SDL_ANYFORMAT</TT
	> prevents this and causes SDL to use the video surface, regardless of its pixel depth.</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_HWPALETTE</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>Give SDL exclusive palette access. Without this flag you may not always get the the colors you request with <A
	HREF="sdlsetcolors.html"
	><TT
	CLASS="FUNCTION"
	>SDL_SetColors</TT
	></A
	> or <A
	HREF="sdlsetpalette.html"
	><TT
	CLASS="FUNCTION"
	>SDL_SetPalette</TT
	></A
	>.</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_DOUBLEBUF</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>Enable hardware double buffering; only valid with SDL_HWSURFACE. Calling
	<A
	HREF="sdlflip.html"
	><TT
	CLASS="FUNCTION"
	>SDL_Flip</TT
	></A
	> will flip the
	buffers and update the screen. All drawing will take place on the surface
	that is not displayed at the moment. If double buffering could not be enabled
	then <TT
	CLASS="FUNCTION"
	>SDL_Flip</TT
	> will just perform a
	<A
	HREF="sdlupdaterect.html"
	><TT
	CLASS="FUNCTION"
	>SDL_UpdateRect</TT
	></A
	>
	on the entire screen.</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_FULLSCREEN</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>SDL will attempt to use a fullscreen mode. If a hardware resolution change is
	not possible (for whatever reason), the next higher resolution will be used and
	the display window centered on a black background.</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_OPENGL</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>Create an OpenGL rendering context. You should have previously set OpenGL video attributes with <A
	HREF="sdlglsetattribute.html"
	><TT
	CLASS="FUNCTION"
	>SDL_GL_SetAttribute</TT
	></A
	>.</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_OPENGLBLIT</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>Create an OpenGL rendering context, like above, but allow normal blitting
	operations. The screen (2D) surface may have an alpha channel, and
	<A
	HREF="sdlupdaterects.html"
	><TT
	CLASS="FUNCTION"
	>SDL_UpdateRects</TT
	></A
	>
	must be used for updating changes to the screen surface. NOTE: This option
	is kept for compatibility only, and is <SPAN
	CLASS="emphasis"
	><I
	CLASS="EMPHASIS"
	>not</I
	></SPAN
	> recommended for
	new code.</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_RESIZABLE</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>Create a resizable window. When the window is resized by the user a <A
	HREF="sdlresizeevent.html"
	><TT
	CLASS="LITERAL"
	>SDL_VIDEORESIZE</TT
	></A
	> event is generated and <TT
	CLASS="FUNCTION"
	>SDL_SetVideoMode</TT
	> can be called again with the new size.</TD
	></TR
	><TR
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	><TT
	CLASS="LITERAL"
	>SDL_NOFRAME</TT
	></TD
	><TD
	ALIGN="LEFT"
	VALIGN="TOP"
	>If possible, <TT
	CLASS="LITERAL"
	>SDL_NOFRAME</TT
	> causes SDL to create a window with no title bar or frame decoration. Fullscreen modes automatically have this flag set.</TD
	></TR
	></TBODY
	></TABLE
	><P
	></P
	></DIV
	><DIV
	CLASS="NOTE"
	><BLOCKQUOTE
	CLASS="NOTE"
	><P
	><B
	>Note: </B
	>Whatever <TT
	CLASS="PARAMETER"
	><I
	>flags</I
	></TT
	> <TT
	CLASS="FUNCTION"
	>SDL_SetVideoMode</TT
	> could satisfy are set in the <TT
	CLASS="STRUCTFIELD"
	><I
	>flags</I
	></TT
	> member of the returned surface.</P
	></BLOCKQUOTE
	></DIV
	><DIV
	CLASS="NOTE"
	><BLOCKQUOTE
	CLASS="NOTE"
	><P
	><B
	>Note: </B
	>The <TT
	CLASS="PARAMETER"
	><I
	>bpp</I
	></TT
	> parameter is the number of bits per pixel,
	so a <TT
	CLASS="PARAMETER"
	><I
	>bpp</I
	></TT
	> of 24 uses the packed representation of
	3 bytes/pixel. For the more common 4 bytes/pixel mode, use a
	<TT
	CLASS="PARAMETER"
	><I
	>bpp</I
	></TT
	> of 32. Somewhat oddly, both 15 and 16 will
	request a 2 bytes/pixel mode, but different pixel formats.</P
	></BLOCKQUOTE
	></DIV
	></DIV
	><DIV
	CLASS="REFSECT1"
	><A
	NAME="AEN1336"
	></A
	><H2
	>Return Value</H2
	><P
	>The framebuffer surface, or <SPAN
	CLASS="RETURNVALUE"
	>NULL</SPAN
	> if it fails.
	The surface returned is freed by SDL_Quit() and should nt be freed by
	the caller.</P
	></DIV
	><DIV
	CLASS="REFSECT1"
	><A
	NAME="AEN1340"
	></A
	><H2
	>See Also</H2
	><P
	><A
	HREF="sdllocksurface.html"
	><TT
	CLASS="FUNCTION"
	>SDL_LockSurface</TT
	></A
	>,
	<A
	HREF="sdlsetcolors.html"
	><TT
	CLASS="FUNCTION"
	>SDL_SetColors</TT
	></A
	>,
	<A
	HREF="sdlflip.html"
	><TT
	CLASS="FUNCTION"
	>SDL_Flip</TT
	></A
	>,
	<A
	HREF="sdlsurface.html"
	><SPAN
	CLASS="STRUCTNAME"
	>SDL_Surface</SPAN
	></A
	></P
	></DIV
	><DIV
	CLASS="NAVFOOTER"
	><HR
	ALIGN="LEFT"
	WIDTH="100%"><TABLE
	SUMMARY="Footer navigation table"
	WIDTH="100%"
	BORDER="0"
	CELLPADDING="0"
	CELLSPACING="0"
	><TR
	><TD
	WIDTH="33%"
	ALIGN="left"
	VALIGN="top"
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