Mercurial > sdl-ios-xcode
annotate docs/html/sdlsettimer.html @ 983:7f08bd66f1ca
Date: Fri, 19 Nov 2004 06:23:53 -0800 (PST)
From: Eric Wing
Subject: OS X Mouse inversion problem fix (again)
Here's yet another patch for the OS X mouse inversion
problem. This should fix the problem once and for all.
I know I've said this before, but *This time for
sure!* :)
If you recall, my last patch broke the non-OpenGL
windowed code and caused the inversion to occur there
instead. Max submitted a patch that partially reverted
the changes back which included the os version hack
which is currently the most recent CVS.
Aaron Sullivan identified and reported to the mailing
list the other day, that the last partial regression
of the code broke OS X 10.2. Looking over the results,
I'm thinking that I was slightly more successful than
I thought at unifying the code. I think I was trying
to unify the code base for OpenGL and non-OpenGL
windowed modes for all versions of the OS. It looks
like I failed at at unifying the OpenGL and non-OpenGL
code, but I did succeed at unifying the OS versions.
Thus, we no longer need the hack for the OS version
checks. The partial regression still included an OS
check which is what broke things for < 10.3.
Attached is the patch for SDL_QuartzWM.m. It basically
is a half-line change that removes one of the two
checks that decides if the mouse coordinates need to
be inverted, i.e:
if (system_version >= 0x1030 &&
(SDL_VideoSurface->flags & SDL_OPENGL) )
becomes this:
if(SDL_VideoSurface->flags & SDL_OPENGL)
With Aaron's outstanding help, we have collectively
tested:
windowed OpenGL
windowed non-OpenGL
fullscreen OpenGL
fullscreen non-OpenGL
under OS X 10.2 (Jaguar), 10.3 (Panther), and 10.4
(Tiger).
We don't have access to 10.0 or 10.1, but since the
original problem didn't materialize until 10.3, I'm
hopeful that testing 10.2 is sufficient. And now that
the code is uniform, I'm also hoping we'll be safe
moving forward to deal with future revisions of the OS
with this issue.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 21 Nov 2004 00:57:47 +0000 |
parents | 355632dca928 |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_SetTimer</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="Time" | |
14 HREF="time.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_RemoveTimer" | |
17 HREF="sdlremovetimer.html"></HEAD | |
18 ><BODY | |
19 CLASS="REFENTRY" | |
20 BGCOLOR="#FFF8DC" | |
21 TEXT="#000000" | |
22 LINK="#0000ee" | |
23 VLINK="#551a8b" | |
24 ALINK="#ff0000" | |
25 ><DIV | |
26 CLASS="NAVHEADER" | |
27 ><TABLE | |
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28 SUMMARY="Header navigation table" |
0 | 29 WIDTH="100%" |
30 BORDER="0" | |
31 CELLPADDING="0" | |
32 CELLSPACING="0" | |
33 ><TR | |
34 ><TH | |
35 COLSPAN="3" | |
36 ALIGN="center" | |
37 >SDL Library Documentation</TH | |
38 ></TR | |
39 ><TR | |
40 ><TD | |
41 WIDTH="10%" | |
42 ALIGN="left" | |
43 VALIGN="bottom" | |
44 ><A | |
45 HREF="sdlremovetimer.html" | |
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46 ACCESSKEY="P" |
0 | 47 >Prev</A |
48 ></TD | |
49 ><TD | |
50 WIDTH="80%" | |
51 ALIGN="center" | |
52 VALIGN="bottom" | |
53 ></TD | |
54 ><TD | |
55 WIDTH="10%" | |
56 ALIGN="right" | |
57 VALIGN="bottom" | |
58 > </TD | |
59 ></TR | |
60 ></TABLE | |
61 ><HR | |
62 ALIGN="LEFT" | |
63 WIDTH="100%"></DIV | |
64 ><H1 | |
65 ><A | |
66 NAME="SDLSETTIMER" | |
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67 ></A |
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68 >SDL_SetTimer</H1 |
0 | 69 ><DIV |
70 CLASS="REFNAMEDIV" | |
71 ><A | |
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72 NAME="AEN8557" |
0 | 73 ></A |
74 ><H2 | |
75 >Name</H2 | |
76 >SDL_SetTimer -- Set a callback to run after the specified number of milliseconds has | |
77 elapsed.</DIV | |
78 ><DIV | |
79 CLASS="REFSYNOPSISDIV" | |
80 ><A | |
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81 NAME="AEN8560" |
0 | 82 ></A |
83 ><H2 | |
84 >Synopsis</H2 | |
85 ><DIV | |
86 CLASS="FUNCSYNOPSIS" | |
87 ><A | |
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88 NAME="AEN8561" |
0 | 89 ></A |
90 ><P | |
91 ></P | |
92 ><PRE | |
93 CLASS="FUNCSYNOPSISINFO" | |
94 >#include "SDL.h"</PRE | |
95 ><P | |
96 ><CODE | |
97 ><CODE | |
98 CLASS="FUNCDEF" | |
99 >int <B | |
100 CLASS="FSFUNC" | |
101 >SDL_SetTimer</B | |
102 ></CODE | |
103 >(Uint32 interval, SDL_TimerCallback callback);</CODE | |
104 ></P | |
105 ><P | |
106 ></P | |
107 ></DIV | |
108 ></DIV | |
109 ><DIV | |
110 CLASS="REFSECT1" | |
111 ><A | |
112 NAME="SDLTIMERCALLBACK" | |
113 ></A | |
114 ><H2 | |
115 >Callback</H2 | |
116 ><P | |
117 >/* Function prototype for the timer callback function */ | |
118 typedef Uint32 (*SDL_TimerCallback)(Uint32 interval);</P | |
119 ></DIV | |
120 ><DIV | |
121 CLASS="REFSECT1" | |
122 ><A | |
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123 NAME="AEN8570" |
0 | 124 ></A |
125 ><H2 | |
126 >Description</H2 | |
127 ><P | |
128 >Set a callback to run after the specified number of milliseconds has | |
129 elapsed. The callback function is passed the current timer interval | |
130 and returns the next timer interval. If the returned value is the | |
131 same as the one passed in, the periodic alarm continues, otherwise a | |
132 new alarm is scheduled.</P | |
133 ><P | |
134 >To cancel a currently running timer, call | |
135 <TT | |
136 CLASS="FUNCTION" | |
137 >SDL_SetTimer(0, NULL);</TT | |
138 ></P | |
139 ><P | |
140 >The timer callback function may run in a different thread than your | |
141 main constant, and so shouldn't call any functions from within itself.</P | |
142 ><P | |
143 >The maximum resolution of this timer is 10 ms, which means that if | |
144 you request a 16 ms timer, your callback will run approximately 20 ms | |
145 later on an unloaded system. If you wanted to set a flag signaling | |
146 a frame update at 30 frames per second (every 33 ms), you might set a | |
147 timer for 30 ms (see example below).</P | |
148 ><P | |
149 >If you use this function, you need to pass <TT | |
150 CLASS="LITERAL" | |
151 >SDL_INIT_TIMER</TT | |
152 > | |
153 to <TT | |
154 CLASS="FUNCTION" | |
155 >SDL_Init()</TT | |
156 >.</P | |
157 ><DIV | |
158 CLASS="NOTE" | |
159 ><BLOCKQUOTE | |
160 CLASS="NOTE" | |
161 ><P | |
162 ><B | |
163 >Note: </B | |
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164 >This function is kept for compatibility but has been superseded |
0 | 165 by the new timer functions |
166 <A | |
167 HREF="sdladdtimer.html" | |
168 >SDL_AddTimer</A | |
169 > and | |
170 <A | |
171 HREF="sdlremovetimer.html" | |
172 >SDL_RemoveTimer</A | |
173 > which support | |
174 multiple timers.</P | |
175 ></BLOCKQUOTE | |
176 ></DIV | |
177 ></DIV | |
178 ><DIV | |
179 CLASS="REFSECT1" | |
180 ><A | |
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181 NAME="AEN8584" |
0 | 182 ></A |
183 ><H2 | |
184 >Examples</H2 | |
185 ><P | |
186 ><PRE | |
187 CLASS="PROGRAMLISTING" | |
188 >SDL_SetTimer((33/10)*10, my_callback);</PRE | |
189 ></P | |
190 ></DIV | |
191 ><DIV | |
192 CLASS="REFSECT1" | |
193 ><A | |
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194 NAME="AEN8588" |
0 | 195 ></A |
196 ><H2 | |
197 >See Also</H2 | |
198 ><P | |
199 ><A | |
200 HREF="sdladdtimer.html" | |
201 ><TT | |
202 CLASS="FUNCTION" | |
203 >SDL_AddTimer</TT | |
204 ></A | |
205 ></P | |
206 ></DIV | |
207 ><DIV | |
208 CLASS="NAVFOOTER" | |
209 ><HR | |
210 ALIGN="LEFT" | |
211 WIDTH="100%"><TABLE | |
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212 SUMMARY="Footer navigation table" |
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214 BORDER="0" | |
215 CELLPADDING="0" | |
216 CELLSPACING="0" | |
217 ><TR | |
218 ><TD | |
219 WIDTH="33%" | |
220 ALIGN="left" | |
221 VALIGN="top" | |
222 ><A | |
223 HREF="sdlremovetimer.html" | |
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224 ACCESSKEY="P" |
0 | 225 >Prev</A |
226 ></TD | |
227 ><TD | |
228 WIDTH="34%" | |
229 ALIGN="center" | |
230 VALIGN="top" | |
231 ><A | |
232 HREF="index.html" | |
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233 ACCESSKEY="H" |
0 | 234 >Home</A |
235 ></TD | |
236 ><TD | |
237 WIDTH="33%" | |
238 ALIGN="right" | |
239 VALIGN="top" | |
240 > </TD | |
241 ></TR | |
242 ><TR | |
243 ><TD | |
244 WIDTH="33%" | |
245 ALIGN="left" | |
246 VALIGN="top" | |
247 >SDL_RemoveTimer</TD | |
248 ><TD | |
249 WIDTH="34%" | |
250 ALIGN="center" | |
251 VALIGN="top" | |
252 ><A | |
253 HREF="time.html" | |
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254 ACCESSKEY="U" |
0 | 255 >Up</A |
256 ></TD | |
257 ><TD | |
258 WIDTH="33%" | |
259 ALIGN="right" | |
260 VALIGN="top" | |
261 > </TD | |
262 ></TR | |
263 ></TABLE | |
264 ></DIV | |
265 ></BODY | |
266 ></HTML | |
267 > |