Mercurial > sdl-ios-xcode
annotate docs/html/sdlglgetattribute.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 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_GL_GetAttribute</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="Video" | |
14 HREF="video.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_GL_GetProcAddress" | |
17 HREF="sdlglgetprocaddress.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_GL_SetAttribute" | |
20 HREF="sdlglsetattribute.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="sdlglgetprocaddress.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="sdlglsetattribute.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="SDLGLGETATTRIBUTE" | |
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74 ></A |
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75 >SDL_GL_GetAttribute</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN2708" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_GL_GetAttribute -- Get the value of a special SDL/OpenGL attribute</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN2711" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN2712" |
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 >int <B | |
106 CLASS="FSFUNC" | |
107 >SDL_GL_GetAttribute</B | |
108 ></CODE | |
109 >(SDLGLattr attr, int *value);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN2718" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Places the value of the SDL/OpenGL <A | |
124 HREF="sdlglattr.html" | |
125 >attribute</A | |
126 > <TT | |
127 CLASS="PARAMETER" | |
128 ><I | |
129 >attr</I | |
130 ></TT | |
131 > into <TT | |
132 CLASS="PARAMETER" | |
133 ><I | |
134 >value</I | |
135 ></TT | |
136 >. This is useful after a call to <A | |
137 HREF="sdlsetvideomode.html" | |
138 ><TT | |
139 CLASS="FUNCTION" | |
140 >SDL_SetVideoMode</TT | |
141 ></A | |
142 > to check whether your attributes have been <A | |
143 HREF="sdlglsetattribute.html" | |
144 >set</A | |
145 > as you expected.</P | |
146 ></DIV | |
147 ><DIV | |
148 CLASS="REFSECT1" | |
149 ><A | |
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150 NAME="AEN2727" |
0 | 151 ></A |
152 ><H2 | |
153 >Return Value</H2 | |
154 ><P | |
155 >Returns <SPAN | |
156 CLASS="RETURNVALUE" | |
157 >0</SPAN | |
158 > on success, or <SPAN | |
159 CLASS="RETURNVALUE" | |
160 >-1</SPAN | |
161 > on an error.</P | |
162 ></DIV | |
163 ><DIV | |
164 CLASS="REFSECT1" | |
165 ><A | |
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166 NAME="AEN2732" |
0 | 167 ></A |
168 ><H2 | |
169 >See Also</H2 | |
170 ><P | |
171 ><A | |
172 HREF="sdlglsetattribute.html" | |
173 ><TT | |
174 CLASS="FUNCTION" | |
175 >SDL_GL_SetAttribute</TT | |
176 ></A | |
177 >, | |
178 <A | |
179 HREF="sdlglattr.html" | |
180 >GL Attributes</A | |
181 ></P | |
182 ></DIV | |
183 ><DIV | |
184 CLASS="NAVFOOTER" | |
185 ><HR | |
186 ALIGN="LEFT" | |
187 WIDTH="100%"><TABLE | |
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188 SUMMARY="Footer navigation table" |
0 | 189 WIDTH="100%" |
190 BORDER="0" | |
191 CELLPADDING="0" | |
192 CELLSPACING="0" | |
193 ><TR | |
194 ><TD | |
195 WIDTH="33%" | |
196 ALIGN="left" | |
197 VALIGN="top" | |
198 ><A | |
199 HREF="sdlglgetprocaddress.html" | |
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200 ACCESSKEY="P" |
0 | 201 >Prev</A |
202 ></TD | |
203 ><TD | |
204 WIDTH="34%" | |
205 ALIGN="center" | |
206 VALIGN="top" | |
207 ><A | |
208 HREF="index.html" | |
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209 ACCESSKEY="H" |
0 | 210 >Home</A |
211 ></TD | |
212 ><TD | |
213 WIDTH="33%" | |
214 ALIGN="right" | |
215 VALIGN="top" | |
216 ><A | |
217 HREF="sdlglsetattribute.html" | |
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218 ACCESSKEY="N" |
0 | 219 >Next</A |
220 ></TD | |
221 ></TR | |
222 ><TR | |
223 ><TD | |
224 WIDTH="33%" | |
225 ALIGN="left" | |
226 VALIGN="top" | |
227 >SDL_GL_GetProcAddress</TD | |
228 ><TD | |
229 WIDTH="34%" | |
230 ALIGN="center" | |
231 VALIGN="top" | |
232 ><A | |
233 HREF="video.html" | |
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234 ACCESSKEY="U" |
0 | 235 >Up</A |
236 ></TD | |
237 ><TD | |
238 WIDTH="33%" | |
239 ALIGN="right" | |
240 VALIGN="top" | |
241 >SDL_GL_SetAttribute</TD | |
242 ></TR | |
243 ></TABLE | |
244 ></DIV | |
245 ></BODY | |
246 ></HTML | |
247 > |