Mercurial > sdl-ios-xcode

view docs/html/sdlvideomodeok.html @ 816:428f688f2ad2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Date: Fri, 13 Feb 2004 17:03:16 +0100 From: Max Horn Subject: Modifier key fix The internal modifier state can get out of sync with reality. To trigger this, do for example this: 1) Launch an SDL app 2) Alt-click on the desktop (this will hide the SDL app). 3) Bring the SDL app back to the front 4) SDL will still think alt is pressed (and as such will treat left clicks like middle clicks). If you press and release alt, it'll be fine again. The attached patch cures this by rechecking the modifier state whenever we process an event.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 13 Feb 2004 17:57:16 +0000
parents 355632dca928
children
line wrap: on
line source

<HTML
><HEAD
><TITLE
>SDL_VideoModeOK</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_ListModes"
HREF="sdllistmodes.html"><LINK
REL="NEXT"
TITLE="SDL_SetVideoMode"
HREF="sdlsetvideomode.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"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>SDL Library Documentation</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="sdllistmodes.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="sdlsetvideomode.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="SDLVIDEOMODEOK"
></A
>SDL_VideoModeOK</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN1202"
></A
><H2
>Name</H2
>SDL_VideoModeOK&nbsp;--&nbsp;Check to see if a particular video mode is supported.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN1205"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN1206"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_VideoModeOK</B
></CODE
>(int width, int height, int bpp, Uint32 flags);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN1212"
></A
><H2
>Description</H2
><P
><TT
CLASS="FUNCTION"
>SDL_VideoModeOK</TT
> returns <SPAN
CLASS="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 <A
HREF="sdlsurface.html"
>surface</A
> flags (see <A
HREF="sdlsetvideomode.html"
><TT
CLASS="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 <A
HREF="sdlsetvideomode.html"
>setting</A
>  the video mode and SDL will emulate that color depth with a shadow video surface.</P
><P
>The arguments to <TT
CLASS="FUNCTION"
>SDL_VideoModeOK</TT
> are the same ones you 
would pass to <A
HREF="sdlsetvideomode.html"
>SDL_SetVideoMode</A
></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN1225"
></A
><H2
>Example</H2
><PRE
CLASS="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
><DIV
CLASS="REFSECT1"
><A
NAME="AEN1228"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlsetvideomode.html"
><TT
CLASS="FUNCTION"
>SDL_SetVideoMode</TT
></A
>,
<A
HREF="sdlgetvideoinfo.html"
><TT
CLASS="FUNCTION"
>SDL_GetVideoInfo</TT
></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"
><A
HREF="sdllistmodes.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="sdlsetvideomode.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>SDL_ListModes</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="video.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>SDL_SetVideoMode</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>