Mercurial > sdl-ios-xcode
view docs/html/joystick.html @ 3100:7dc982143c06
Date: Sun, 22 Mar 2009 12:52:29 +0000
From: Luke Benstead
Subject: OpenGL 3.0 Context Creation
I've attached a patch which implements OpenGL 3.x context creation on
the latest SVN. I've added two options to SDL_GL_SetAttribute, these
are SDL_GL_CONTEXT_MAJOR_VERSION and SDL_GL_CONTEXT_MINOR_VERSION.
These default to 2 and 1 respectively. If the major version is less
than 3 then the current context creation method is used, otherwise the
appropriate new context creation function is called (depending on the
platform).
Sample code:
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Unable to initialize SDL: %s\n", SDL_GetError());
return 1;
}
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3); //Without these 2 lines, SDL will create a GL 2.x context
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_Surface* screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL | SDL_FULLSCREEN );
I've implemented context creation on both Win32 and X and run basic
tests on both. This patch doesn't provide access to all the options
allowed by the new context creation (e.g. shared contexts, forward
compatible contexts) but they can be added pretty easily.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Tue, 24 Mar 2009 10:43:53 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >Joystick</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="SDL Reference" HREF="reference.html"><LINK REL="PREVIOUS" TITLE="SDL_JoystickEventState" HREF="sdljoystickeventstate.html"><LINK REL="NEXT" TITLE="SDL_NumJoysticks" HREF="sdlnumjoysticks.html"><META NAME="KEYWORD" CONTENT="joystick"><META NAME="KEYWORD" CONTENT="function"></HEAD ><BODY CLASS="CHAPTER" 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="sdljoystickeventstate.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdlnumjoysticks.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="CHAPTER" ><H1 ><A NAME="JOYSTICK" ></A >Chapter 9. Joystick</H1 ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT ><A HREF="sdlnumjoysticks.html" >SDL_NumJoysticks</A > -- Count available joysticks.</DT ><DT ><A HREF="sdljoystickname.html" >SDL_JoystickName</A > -- Get joystick name.</DT ><DT ><A HREF="sdljoystickopen.html" >SDL_JoystickOpen</A > -- Opens a joystick for use.</DT ><DT ><A HREF="sdljoystickopened.html" >SDL_JoystickOpened</A > -- Determine if a joystick has been opened</DT ><DT ><A HREF="sdljoystickindex.html" >SDL_JoystickIndex</A > -- Get the index of an SDL_Joystick.</DT ><DT ><A HREF="sdljoysticknumaxes.html" >SDL_JoystickNumAxes</A > -- Get the number of joystick axes</DT ><DT ><A HREF="sdljoysticknumballs.html" >SDL_JoystickNumBalls</A > -- Get the number of joystick trackballs</DT ><DT ><A HREF="sdljoysticknumhats.html" >SDL_JoystickNumHats</A > -- Get the number of joystick hats</DT ><DT ><A HREF="sdljoysticknumbuttons.html" >SDL_JoystickNumButtons</A > -- Get the number of joysitck buttons</DT ><DT ><A HREF="sdljoystickupdate.html" >SDL_JoystickUpdate</A > -- Updates the state of all joysticks</DT ><DT ><A HREF="sdljoystickgetaxis.html" >SDL_JoystickGetAxis</A > -- Get the current state of an axis</DT ><DT ><A HREF="sdljoystickgethat.html" >SDL_JoystickGetHat</A > -- Get the current state of a joystick hat</DT ><DT ><A HREF="sdljoystickgetbutton.html" >SDL_JoystickGetButton</A > -- Get the current state of a given button on a given joystick</DT ><DT ><A HREF="sdljoystickgetball.html" >SDL_JoystickGetBall</A > -- Get relative trackball motion</DT ><DT ><A HREF="sdljoystickclose.html" >SDL_JoystickClose</A > -- Closes a previously opened joystick</DT ></DL ></DIV ><P >Joysticks, and other similar input devices, have a very strong role in game playing and SDL provides comprehensive support for them. Axes, Buttons, POV Hats and trackballs are all supported.</P ><P >Joystick support is initialized by passed the <TT CLASS="LITERAL" >SDL_INIT_JOYSTICK</TT > flag to <A HREF="sdlinit.html" ><TT CLASS="FUNCTION" >SDL_Init</TT ></A >. Once initilized joysticks must be opened using <A HREF="sdljoystickopen.html" ><TT CLASS="FUNCTION" >SDL_JoystickOpen</TT ></A >.</P ><P >While using the functions describe in this secton may seem like the best way to access and read from joysticks, in most cases they aren't. Ideally joysticks should be read using the <A HREF="event.html" >event</A > system. To enable this, you must set the joystick event processing state with <A HREF="sdljoystickeventstate.html" ><TT CLASS="FUNCTION" >SDL_JoystickEventState</TT ></A >. Joysticks must be <A HREF="sdljoystickopen.html" >opened</A > before they can be used of course.</P ><DIV CLASS="NOTE" ><BLOCKQUOTE CLASS="NOTE" ><P ><B >Note: </B >If you are <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >not</I ></SPAN > handling the joystick via the event queue then you must explicitly request a joystick update by calling <A HREF="sdljoystickupdate.html" ><TT CLASS="FUNCTION" >SDL_JoystickUpdate</TT ></A >.</P ></BLOCKQUOTE ></DIV ><DIV CLASS="NOTE" ><BLOCKQUOTE CLASS="NOTE" ><P ><B >Note: </B >Force Feedback is not yet support. Sam (slouken@libsdl.org) is soliciting suggestions from people with force-feedback experience on the best wat to desgin the API.</P ></BLOCKQUOTE ></DIV ></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="sdljoystickeventstate.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="sdlnumjoysticks.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_JoystickEventState</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="reference.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_NumJoysticks</TD ></TR ></TABLE ></DIV ></BODY ></HTML >