Mercurial > sdl-ios-xcode
annotate docs/html/sdlfreesurface.html @ 1157:baf35853ad54
Date: Mon, 10 Oct 2005 13:09:32 +0300
From: Tommi Kyntola <tommi.kyntola@ray.fi>
To: sdl@libsdl.org
Subject: [SDL] [RFC] get_ticks broken on linux
It uses gettimeofday to calculate the timedifference.
Gettimeofday returns current time which is seldom monotonous.
This breaks SDL timer subsystem. (time callbacks and all that
get borked when the time difference ms is suddenly ~ 2^32)
I posted a message about this earlier but got no response.
Some thoughts on this matter would be appreciated.
(Or even an explanation for the lack of interest.)
A patch below would use the posix timers that have been around
since posix 93 and do provide a good source of monotonous time
on linux boxes (and on few others too).
The following patch is also availabe at:
http://www.hut.fi/u/tkyntola/SDL-1.2.9-clockfix.patch
It's against 1.2.9, but I can easily rediffit against
the cvs branch is needed.
cheers,
Tommi Kyntola tommi.kyntola@ray.fi
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Tue, 11 Oct 2005 18:16:12 +0000 |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_FreeSurface</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_CreateRGBSurfaceFrom" | |
17 HREF="sdlcreatergbsurfacefrom.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_LockSurface" | |
20 HREF="sdllocksurface.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="sdlcreatergbsurfacefrom.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="sdllocksurface.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="SDLFREESURFACE" | |
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74 ></A |
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75 >SDL_FreeSurface</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN1893" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
55
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83 >SDL_FreeSurface -- Frees (deletes) a SDL_Surface</DIV |
0 | 84 ><DIV |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN1896" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN1897" |
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_FreeSurface</B | |
108 ></CODE | |
109 >(SDL_Surface *surface);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN1903" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Frees the resources used by a previously created <SPAN | |
124 CLASS="STRUCTNAME" | |
125 >SDL_Surface</SPAN | |
126 >. If the surface was created using | |
127 <A | |
128 HREF="sdlcreatergbsurfacefrom.html" | |
129 >SDL_CreateRGBSurfaceFrom</A | |
130 > then the pixel data is not freed.</P | |
131 ></DIV | |
132 ><DIV | |
133 CLASS="REFSECT1" | |
134 ><A | |
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135 NAME="AEN1908" |
0 | 136 ></A |
137 ><H2 | |
138 >See Also</H2 | |
139 ><P | |
140 ><A | |
141 HREF="sdlcreatergbsurface.html" | |
142 ><TT | |
143 CLASS="FUNCTION" | |
144 >SDL_CreateRGBSurface</TT | |
145 ></A | |
146 > | |
147 <A | |
148 HREF="sdlcreatergbsurfacefrom.html" | |
149 ><TT | |
150 CLASS="FUNCTION" | |
151 >SDL_CreateRGBSurfaceFrom</TT | |
152 ></A | |
153 ></P | |
154 ></DIV | |
155 ><DIV | |
156 CLASS="NAVFOOTER" | |
157 ><HR | |
158 ALIGN="LEFT" | |
159 WIDTH="100%"><TABLE | |
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160 SUMMARY="Footer navigation table" |
0 | 161 WIDTH="100%" |
162 BORDER="0" | |
163 CELLPADDING="0" | |
164 CELLSPACING="0" | |
165 ><TR | |
166 ><TD | |
167 WIDTH="33%" | |
168 ALIGN="left" | |
169 VALIGN="top" | |
170 ><A | |
171 HREF="sdlcreatergbsurfacefrom.html" | |
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172 ACCESSKEY="P" |
0 | 173 >Prev</A |
174 ></TD | |
175 ><TD | |
176 WIDTH="34%" | |
177 ALIGN="center" | |
178 VALIGN="top" | |
179 ><A | |
180 HREF="index.html" | |
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181 ACCESSKEY="H" |
0 | 182 >Home</A |
183 ></TD | |
184 ><TD | |
185 WIDTH="33%" | |
186 ALIGN="right" | |
187 VALIGN="top" | |
188 ><A | |
189 HREF="sdllocksurface.html" | |
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190 ACCESSKEY="N" |
0 | 191 >Next</A |
192 ></TD | |
193 ></TR | |
194 ><TR | |
195 ><TD | |
196 WIDTH="33%" | |
197 ALIGN="left" | |
198 VALIGN="top" | |
199 >SDL_CreateRGBSurfaceFrom</TD | |
200 ><TD | |
201 WIDTH="34%" | |
202 ALIGN="center" | |
203 VALIGN="top" | |
204 ><A | |
205 HREF="video.html" | |
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206 ACCESSKEY="U" |
0 | 207 >Up</A |
208 ></TD | |
209 ><TD | |
210 WIDTH="33%" | |
211 ALIGN="right" | |
212 VALIGN="top" | |
213 >SDL_LockSurface</TD | |
214 ></TR | |
215 ></TABLE | |
216 ></DIV | |
217 ></BODY | |
218 ></HTML | |
219 > |