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annotate docs/html/sdlconvertsurface.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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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_ConvertSurface</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_GetClipRect" | |
17 HREF="sdlgetcliprect.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_BlitSurface" | |
20 HREF="sdlblitsurface.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="sdlgetcliprect.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="sdlblitsurface.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="SDLCONVERTSURFACE" | |
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74 ></A |
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75 >SDL_ConvertSurface</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN2258" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_ConvertSurface -- Converts a surface to the same format as another surface.</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN2261" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN2262" |
0 | 95 ></A |
96 ><P | |
97 ></P | |
98 ><PRE | |
99 CLASS="FUNCSYNOPSISINFO" | |
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100 >#include "SDL/SDL.h"</PRE |
0 | 101 ><P |
102 ><CODE | |
103 ><CODE | |
104 CLASS="FUNCDEF" | |
105 >SDL_Surface *<B | |
106 CLASS="FSFUNC" | |
107 >SDL_ConvertSurface</B | |
108 ></CODE | |
109 >(SDL_Surface *src, SDL_PixelFormat *fmt, 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="AEN2268" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Creates a new surface of the specified format, and then copies and maps | |
124 the given surface to it. If this function fails, it returns | |
125 <TT | |
126 CLASS="LITERAL" | |
127 >NULL</TT | |
128 >.</P | |
129 ><P | |
130 >The <TT | |
131 CLASS="PARAMETER" | |
132 ><I | |
133 >flags</I | |
134 ></TT | |
135 > parameter is passed to | |
136 <A | |
137 HREF="sdlcreatergbsurface.html" | |
138 ><TT | |
139 CLASS="FUNCTION" | |
140 >SDL_CreateRGBSurface</TT | |
141 ></A | |
142 > | |
143 and has those semantics.</P | |
144 ><P | |
145 >This function is used internally by | |
146 <A | |
147 HREF="sdldisplayformat.html" | |
148 ><TT | |
149 CLASS="FUNCTION" | |
150 >SDL_DisplayFormat</TT | |
151 ></A | |
152 >.</P | |
181
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153 ><P |
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154 >This function can only be called after SDL_Init.</P |
0 | 155 ></DIV |
156 ><DIV | |
157 CLASS="REFSECT1" | |
158 ><A | |
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159 NAME="AEN2280" |
0 | 160 ></A |
161 ><H2 | |
162 >Return Value</H2 | |
163 ><P | |
164 >Returns either a pointer to the new surface, or | |
165 <TT | |
166 CLASS="LITERAL" | |
167 >NULL</TT | |
168 > on error.</P | |
169 ></DIV | |
170 ><DIV | |
171 CLASS="REFSECT1" | |
172 ><A | |
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173 NAME="AEN2284" |
0 | 174 ></A |
175 ><H2 | |
176 >See Also</H2 | |
177 ><P | |
178 ><A | |
179 HREF="sdlcreatergbsurface.html" | |
180 ><TT | |
181 CLASS="FUNCTION" | |
182 >SDL_CreateRGBSurface</TT | |
183 ></A | |
184 >, | |
185 <A | |
186 HREF="sdldisplayformat.html" | |
187 ><TT | |
188 CLASS="FUNCTION" | |
189 >SDL_DisplayFormat</TT | |
190 ></A | |
191 >, | |
192 <A | |
193 HREF="sdlpixelformat.html" | |
194 ><SPAN | |
195 CLASS="STRUCTNAME" | |
196 >SDL_PixelFormat</SPAN | |
197 ></A | |
198 >, | |
199 <A | |
200 HREF="sdlsurface.html" | |
201 ><SPAN | |
202 CLASS="STRUCTNAME" | |
203 >SDL_Surface</SPAN | |
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" |
0 | 213 WIDTH="100%" |
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="sdlgetcliprect.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 ><A | |
241 HREF="sdlblitsurface.html" | |
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242 ACCESSKEY="N" |
0 | 243 >Next</A |
244 ></TD | |
245 ></TR | |
246 ><TR | |
247 ><TD | |
248 WIDTH="33%" | |
249 ALIGN="left" | |
250 VALIGN="top" | |
251 >SDL_GetClipRect</TD | |
252 ><TD | |
253 WIDTH="34%" | |
254 ALIGN="center" | |
255 VALIGN="top" | |
256 ><A | |
257 HREF="video.html" | |
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258 ACCESSKEY="U" |
0 | 259 >Up</A |
260 ></TD | |
261 ><TD | |
262 WIDTH="33%" | |
263 ALIGN="right" | |
264 VALIGN="top" | |
265 >SDL_BlitSurface</TD | |
266 ></TR | |
267 ></TABLE | |
268 ></DIV | |
269 ></BODY | |
270 ></HTML | |
271 > |