Mercurial > sdl-ios-xcode
annotate docs/html/sdlwasinit.html @ 914:bbf8dcc8aed6
Date: Wed, 23 Jun 2004 17:05:33 -0400
From: Chris Nelson
Subject: [SDL] [Patch] WiseGroup MP-8800 / MP-8866 (PS2 Joystick)
In the current cvs version, SDL doesn't handle these Playstation2
controller => USB adapters correctly, in linux.
It will always assume that the maximum number of joysticks (2 in the
case of the MP-8866, 4 in the case of the 8800) are plugged in. This is
bad not only because it allows SDL to exaggerate the number of logical
joysticks, but primarily because the joystick axes are mapped
incorrectly, all over the place, such that the devices are effectively
unusable unless you have the maximum number of joysticks plugged in.
My changes to src/joystick/linux/SDL_sysjoystick.c build on another's
previous work (which was a special case for this very joystick,
actually), and fix both of these problems, as well as making the current
code a little more general, to allow for others to more easily drop in
code for quirky joysticks such as these.
I've tested this code under 2.6.7 as well as 2.4.24... Both work as
advertised (provided you load the JOYDEV linux code as a module,
otherwise they won't work at all, new code or old, but that's another
issue entirely).
Though this sounds horribly formal, you have my permission to distribute
all of my work on this issue under the LGPL. So there.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 25 Jul 2004 18:31:50 +0000 |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_WasInit</TITLE | |
5 ><META | |
6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
0 | 8 "><LINK |
9 REL="HOME" | |
10 TITLE="SDL Library Documentation" | |
11 HREF="index.html"><LINK | |
12 REL="UP" | |
13 TITLE="General" | |
14 HREF="general.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_Quit" | |
17 HREF="sdlquit.html"><LINK | |
18 REL="NEXT" | |
181
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19 TITLE="SDL_GetError" |
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20 HREF="sdlgeterror.html"></HEAD |
0 | 21 ><BODY |
22 CLASS="REFENTRY" | |
23 BGCOLOR="#FFF8DC" | |
24 TEXT="#000000" | |
25 LINK="#0000ee" | |
26 VLINK="#551a8b" | |
27 ALINK="#ff0000" | |
28 ><DIV | |
29 CLASS="NAVHEADER" | |
30 ><TABLE | |
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31 SUMMARY="Header navigation table" |
0 | 32 WIDTH="100%" |
33 BORDER="0" | |
34 CELLPADDING="0" | |
35 CELLSPACING="0" | |
36 ><TR | |
37 ><TH | |
38 COLSPAN="3" | |
39 ALIGN="center" | |
40 >SDL Library Documentation</TH | |
41 ></TR | |
42 ><TR | |
43 ><TD | |
44 WIDTH="10%" | |
45 ALIGN="left" | |
46 VALIGN="bottom" | |
47 ><A | |
48 HREF="sdlquit.html" | |
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49 ACCESSKEY="P" |
0 | 50 >Prev</A |
51 ></TD | |
52 ><TD | |
53 WIDTH="80%" | |
54 ALIGN="center" | |
55 VALIGN="bottom" | |
56 ></TD | |
57 ><TD | |
58 WIDTH="10%" | |
59 ALIGN="right" | |
60 VALIGN="bottom" | |
61 ><A | |
181
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62 HREF="sdlgeterror.html" |
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63 ACCESSKEY="N" |
0 | 64 >Next</A |
65 ></TD | |
66 ></TR | |
67 ></TABLE | |
68 ><HR | |
69 ALIGN="LEFT" | |
70 WIDTH="100%"></DIV | |
71 ><H1 | |
72 ><A | |
73 NAME="SDLWASINIT" | |
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74 ></A |
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75 >SDL_WasInit</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
55
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79 NAME="AEN617" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_WasInit -- Check which subsystems are initialized</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN620" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN621" |
0 | 95 ></A |
96 ><P | |
97 ></P | |
98 ><PRE | |
99 CLASS="FUNCSYNOPSISINFO" | |
100 >#include "SDL.h"</PRE | |
101 ><P | |
102 ><CODE | |
103 ><CODE | |
104 CLASS="FUNCDEF" | |
105 >Uint32 <B | |
106 CLASS="FSFUNC" | |
107 >SDL_WasInit</B | |
108 ></CODE | |
109 >(Uint32 flags);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN627" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 ><TT | |
124 CLASS="FUNCTION" | |
125 >SDL_WasInit</TT | |
126 > allows you to see which SDL subsytems have been <A | |
127 HREF="sdlinit.html" | |
128 >initialized</A | |
129 >. <TT | |
130 CLASS="PARAMETER" | |
131 ><I | |
132 >flags</I | |
133 ></TT | |
134 > is a bitwise OR'd combination of the subsystems you wish to check (see <A | |
135 HREF="sdlinit.html" | |
136 ><TT | |
137 CLASS="FUNCTION" | |
138 >SDL_Init</TT | |
139 ></A | |
140 > for a list of subsystem flags).</P | |
141 ></DIV | |
142 ><DIV | |
143 CLASS="REFSECT1" | |
144 ><A | |
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145 NAME="AEN635" |
0 | 146 ></A |
147 ><H2 | |
148 >Return Value</H2 | |
149 ><P | |
150 ><TT | |
151 CLASS="FUNCTION" | |
152 >SDL_WasInit</TT | |
153 > returns a bitwised OR'd combination of the initialized subsystems.</P | |
154 ></DIV | |
155 ><DIV | |
156 CLASS="REFSECT1" | |
157 ><A | |
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158 NAME="AEN639" |
0 | 159 ></A |
160 ><H2 | |
161 >Examples</H2 | |
162 ><PRE | |
163 CLASS="PROGRAMLISTING" | |
164 > /* Here are several ways you can use SDL_WasInit() */ | |
165 | |
166 /* Get init data on all the subsystems */ | |
167 Uint32 subsystem_init; | |
168 | |
169 subsystem_init=SDL_WasInit(SDL_INIT_EVERYTHING); | |
170 | |
171 if(subsystem_init&SDL_INIT_VIDEO) | |
172 printf("Video is initialized.\n"); | |
173 else | |
174 printf("Video is not initialized.\n"); | |
175 | |
176 | |
177 | |
178 /* Just check for one specfic subsystem */ | |
179 | |
180 if(SDL_WasInit(SDL_INIT_VIDEO)!=0) | |
181 printf("Video is initialized.\n"); | |
182 else | |
183 printf("Video is not initialized.\n"); | |
184 | |
185 | |
186 | |
187 | |
188 /* Check for two subsystems */ | |
189 | |
190 Uint32 subsystem_mask=SDL_INIT_VIDEO|SDL_INIT_AUDIO; | |
191 | |
192 if(SDL_WasInit(subsystem_mask)==subsystem_mask) | |
193 printf("Video and Audio initialized.\n"); | |
194 else | |
195 printf("Video and Audio not initialized.\n"); </PRE | |
196 ></DIV | |
197 ><DIV | |
198 CLASS="REFSECT1" | |
199 ><A | |
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200 NAME="AEN642" |
0 | 201 ></A |
202 ><H2 | |
203 >See Also</H2 | |
204 ><P | |
205 ><A | |
206 HREF="sdlinit.html" | |
207 ><TT | |
208 CLASS="FUNCTION" | |
209 >SDL_Init</TT | |
210 ></A | |
211 >, | |
212 <A | |
213 HREF="sdlinitsubsystem.html" | |
214 ><TT | |
215 CLASS="FUNCTION" | |
216 >SDL_Subsystem</TT | |
217 ></A | |
218 ></P | |
219 ></DIV | |
220 ><DIV | |
221 CLASS="NAVFOOTER" | |
222 ><HR | |
223 ALIGN="LEFT" | |
224 WIDTH="100%"><TABLE | |
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225 SUMMARY="Footer navigation table" |
0 | 226 WIDTH="100%" |
227 BORDER="0" | |
228 CELLPADDING="0" | |
229 CELLSPACING="0" | |
230 ><TR | |
231 ><TD | |
232 WIDTH="33%" | |
233 ALIGN="left" | |
234 VALIGN="top" | |
235 ><A | |
236 HREF="sdlquit.html" | |
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237 ACCESSKEY="P" |
0 | 238 >Prev</A |
239 ></TD | |
240 ><TD | |
241 WIDTH="34%" | |
242 ALIGN="center" | |
243 VALIGN="top" | |
244 ><A | |
245 HREF="index.html" | |
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246 ACCESSKEY="H" |
0 | 247 >Home</A |
248 ></TD | |
249 ><TD | |
250 WIDTH="33%" | |
251 ALIGN="right" | |
252 VALIGN="top" | |
253 ><A | |
181
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254 HREF="sdlgeterror.html" |
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255 ACCESSKEY="N" |
0 | 256 >Next</A |
257 ></TD | |
258 ></TR | |
259 ><TR | |
260 ><TD | |
261 WIDTH="33%" | |
262 ALIGN="left" | |
263 VALIGN="top" | |
264 >SDL_Quit</TD | |
265 ><TD | |
266 WIDTH="34%" | |
267 ALIGN="center" | |
268 VALIGN="top" | |
269 ><A | |
270 HREF="general.html" | |
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271 ACCESSKEY="U" |
0 | 272 >Up</A |
273 ></TD | |
274 ><TD | |
275 WIDTH="33%" | |
276 ALIGN="right" | |
277 VALIGN="top" | |
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278 >SDL_GetError</TD |
0 | 279 ></TR |
280 ></TABLE | |
281 ></DIV | |
282 ></BODY | |
283 ></HTML | |
284 > |