Mercurial > sdl-ios-xcode
annotate docs/html/sdllockaudio.html @ 1295:c3e36ac8a94c
Date: Sun, 6 Mar 2005 17:06:20 +0100
From: Per Inge Mathisen
Subject: [SDL] Fullscreen refresh on win32
Windows has a terrible default for fullscreen 3D apps of 60mhz refresh
rate. This can be fixed by the user by going into his driver's
control panel and forcing the refresh rate higher. However, this not a
very user friendly way about it, and in any case SDL contains no code
that could figure out this that condition has afflicted the user.
So the question is, could SDL fix this for the user? It is possible
under Windows to request a higher refresh rate. The danger is of
course that if the user has an old monitor, and you request a too high
refresh rate, the monitor could be damaged. However, I believe there
might be a way around that: Check before switching what refresh rate
the user's desktop runs in, and if our fullscreen dimensions are equal
or less than those of the desktop, use the higher refresh rate of 60
and the desktop rate.
Since most users run their desktops in the same or higher resolution
something sane, this should fix this problem for most users.
Thoughts?
An alternative is to add an SDL_GL_GetAttribute(SDL_GL_REFRESH_RATE)
option so that programs can bitch at their users at their own
convenience.
- Per
author | Sam Lantinga <slouken@libsdl.org> |
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date | Mon, 30 Jan 2006 06:56:10 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_LockAudio</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="Audio" | |
14 HREF="audio.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_MixAudio" | |
17 HREF="sdlmixaudio.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_UnlockAudio" | |
20 HREF="sdlunlockaudio.html"></HEAD | |
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="sdlmixaudio.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 | |
62 HREF="sdlunlockaudio.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="SDLLOCKAUDIO" | |
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74 ></A |
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75 >SDL_LockAudio</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN7134" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_LockAudio -- Lock out the callback function</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN7137" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN7138" |
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 >void <B | |
106 CLASS="FSFUNC" | |
107 >SDL_LockAudio</B | |
108 ></CODE | |
109 >(void);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN7144" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >The lock manipulated by these functions protects the callback function. | |
124 During a LockAudio period, you can be guaranteed that the | |
125 callback function is not running. Do not call these from the callback | |
126 function or you will cause deadlock.</P | |
127 ></DIV | |
128 ><DIV | |
129 CLASS="REFSECT1" | |
130 ><A | |
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131 NAME="AEN7147" |
0 | 132 ></A |
133 ><H2 | |
134 >See Also</H2 | |
135 ><P | |
136 ><A | |
137 HREF="sdlopenaudio.html" | |
138 ><TT | |
139 CLASS="FUNCTION" | |
140 >SDL_OpenAudio</TT | |
141 ></A | |
142 ></P | |
143 ></DIV | |
144 ><DIV | |
145 CLASS="NAVFOOTER" | |
146 ><HR | |
147 ALIGN="LEFT" | |
148 WIDTH="100%"><TABLE | |
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149 SUMMARY="Footer navigation table" |
0 | 150 WIDTH="100%" |
151 BORDER="0" | |
152 CELLPADDING="0" | |
153 CELLSPACING="0" | |
154 ><TR | |
155 ><TD | |
156 WIDTH="33%" | |
157 ALIGN="left" | |
158 VALIGN="top" | |
159 ><A | |
160 HREF="sdlmixaudio.html" | |
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161 ACCESSKEY="P" |
0 | 162 >Prev</A |
163 ></TD | |
164 ><TD | |
165 WIDTH="34%" | |
166 ALIGN="center" | |
167 VALIGN="top" | |
168 ><A | |
169 HREF="index.html" | |
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170 ACCESSKEY="H" |
0 | 171 >Home</A |
172 ></TD | |
173 ><TD | |
174 WIDTH="33%" | |
175 ALIGN="right" | |
176 VALIGN="top" | |
177 ><A | |
178 HREF="sdlunlockaudio.html" | |
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179 ACCESSKEY="N" |
0 | 180 >Next</A |
181 ></TD | |
182 ></TR | |
183 ><TR | |
184 ><TD | |
185 WIDTH="33%" | |
186 ALIGN="left" | |
187 VALIGN="top" | |
188 >SDL_MixAudio</TD | |
189 ><TD | |
190 WIDTH="34%" | |
191 ALIGN="center" | |
192 VALIGN="top" | |
193 ><A | |
194 HREF="audio.html" | |
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195 ACCESSKEY="U" |
0 | 196 >Up</A |
197 ></TD | |
198 ><TD | |
199 WIDTH="33%" | |
200 ALIGN="right" | |
201 VALIGN="top" | |
202 >SDL_UnlockAudio</TD | |
203 ></TR | |
204 ></TABLE | |
205 ></DIV | |
206 ></BODY | |
207 ></HTML | |
208 > |