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view docs/html/sdlwmgrabinput.html @ 1157:baf35853ad54
Date: Mon, 10 Oct 2005 13:09:32 +0300
From: Tommi Kyntola <tommi.kyntola@ray.fi>
To: sdl@libsdl.org
Subject: [SDL] [RFC] get_ticks broken on linux
It uses gettimeofday to calculate the timedifference.
Gettimeofday returns current time which is seldom monotonous.
This breaks SDL timer subsystem. (time callbacks and all that
get borked when the time difference ms is suddenly ~ 2^32)
I posted a message about this earlier but got no response.
Some thoughts on this matter would be appreciated.
(Or even an explanation for the lack of interest.)
A patch below would use the posix timers that have been around
since posix 93 and do provide a good source of monotonous time
on linux boxes (and on few others too).
The following patch is also availabe at:
http://www.hut.fi/u/tkyntola/SDL-1.2.9-clockfix.patch
It's against 1.2.9, but I can easily rediffit against
the cvs branch is needed.
cheers,
Tommi Kyntola tommi.kyntola@ray.fi
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Tue, 11 Oct 2005 18:16:12 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_WM_GrabInput</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="Window Management" HREF="wm.html"><LINK REL="PREVIOUS" TITLE="SDL_WM_ToggleFullScreen" HREF="sdlwmtogglefullscreen.html"><LINK REL="NEXT" TITLE="Events" HREF="event.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="sdlwmtogglefullscreen.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="event.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLWMGRABINPUT" ></A >SDL_WM_GrabInput</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN3663" ></A ><H2 >Name</H2 >SDL_WM_GrabInput -- Grabs mouse and keyboard input.</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN3666" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN3667" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >SDL_GrabMode <B CLASS="FSFUNC" >SDL_WM_GrabInput</B ></CODE >(SDL_GrabMode mode);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN3673" ></A ><H2 >Description</H2 ><P >Grabbing means that the mouse is confined to the application window, and nearly all keyboard input is passed directly to the application, and not interpreted by a window manager, if any.</P ><P >When <TT CLASS="PARAMETER" ><I >mode</I ></TT > is <TT CLASS="LITERAL" >SDL_GRAB_QUERY</TT > the grab mode is not changed, but the current grab mode is returned.</P ><P ><PRE CLASS="PROGRAMLISTING" >typedef enum { SDL_GRAB_QUERY, SDL_GRAB_OFF, SDL_GRAB_ON } SDL_GrabMode;</PRE > </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN3681" ></A ><H2 >Return Value</H2 ><P >The current/new <SPAN CLASS="STRUCTNAME" >SDL_GrabMode</SPAN >.</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="sdlwmtogglefullscreen.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="event.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_WM_ToggleFullScreen</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="wm.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Events</TD ></TR ></TABLE ></DIV ></BODY ></HTML >