Mercurial > sdl-ios-xcode
annotate docs/html/sdlquit.html @ 883:50f5a29c6a17
Date: Sat, 10 Apr 2004 02:25:33 -0400
From: Glenn Maynard
To: sdl@libsdl.org
Subject: [SDL] SDL_SetVideoMode() failing and not setting an error (patch)
Running an OpenGL SDL application off 1.2.7, at SDL_InitSubSystem(SDL_INIT_VIDEO) time:
Warning: Unable to initialize AAlib mouseUsing AAlib driver: Slang driver 1.0 (slang)
SDL_SetVideoMode then fails; SDL_GetError() returns "".
The installation problem is straightforward: X (the higher priority
driver) isn't running, so SDL is falling back on aalib. However,
no error is being set when aalib fails to initialize. This also
happens with the svgalib driver.
SDL_video.c line ~653 sets mode to NULL, since aalib didn't return an
OpenGL surface. Line ~711 ("failed setting a video mode") returns NULL.
The attached patch sets an error. It's a horrible, useless error
message--it should really say eg. "aalib does not support OpenGL"; this
should probably be done earlier in the individual drivers, too.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 11 Apr 2004 19:54:40 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_Quit</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="General" | |
| 14 HREF="general.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_QuitSubSystem" | |
| 17 HREF="sdlquitsubsystem.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_WasInit" | |
| 20 HREF="sdlwasinit.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="sdlquitsubsystem.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="sdlwasinit.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="SDLQUIT" | |
|
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74 ></A |
|
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75 >SDL_Quit</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
|
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79 NAME="AEN585" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_Quit -- Shut down SDL</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
|
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87 NAME="AEN588" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
|
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94 NAME="AEN589" |
| 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_Quit</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="AEN595" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 ><TT | |
| 124 CLASS="FUNCTION" | |
| 125 >SDL_Quit</TT | |
| 126 > shuts down all SDL subsystems and frees the resources allocated to them. This should always be called before you exit. For the sake of simplicity you can set <TT | |
| 127 CLASS="FUNCTION" | |
| 128 >SDL_Quit</TT | |
| 129 > as your <TT | |
| 130 CLASS="FUNCTION" | |
| 131 >atexit</TT | |
| 132 > call, like: | |
| 133 <PRE | |
| 134 CLASS="PROGRAMLISTING" | |
| 135 >SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO); | |
| 136 atexit(SDL_Quit); | |
| 137 . | |
| 138 .</PRE | |
| 139 ></P | |
| 140 ><DIV | |
| 141 CLASS="NOTE" | |
| 142 ><BLOCKQUOTE | |
| 143 CLASS="NOTE" | |
| 144 ><P | |
| 145 ><B | |
| 146 >Note: </B | |
| 147 >While using <TT | |
| 148 CLASS="FUNCTION" | |
| 149 >atexit</TT | |
| 150 > maybe be fine for small programs, more advanced users should shut down SDL in their own cleanup code. Plus, using <TT | |
| 151 CLASS="FUNCTION" | |
| 152 >atexit</TT | |
| 153 > in a library is a sure way to crash dynamically loaded code</P | |
| 154 ></BLOCKQUOTE | |
| 155 ></DIV | |
| 156 ></DIV | |
| 157 ><DIV | |
| 158 CLASS="REFSECT1" | |
| 159 ><A | |
|
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160 NAME="AEN606" |
| 0 | 161 ></A |
| 162 ><H2 | |
| 163 >See Also</H2 | |
| 164 ><P | |
| 165 ><A | |
| 166 HREF="sdlquitsubsystem.html" | |
| 167 ><TT | |
| 168 CLASS="FUNCTION" | |
| 169 >SDL_QuitSubsystem</TT | |
| 170 ></A | |
| 171 >, | |
| 172 <A | |
| 173 HREF="sdlinit.html" | |
| 174 ><TT | |
| 175 CLASS="FUNCTION" | |
| 176 >SDL_Init</TT | |
| 177 ></A | |
| 178 ></P | |
| 179 ></DIV | |
| 180 ><DIV | |
| 181 CLASS="NAVFOOTER" | |
| 182 ><HR | |
| 183 ALIGN="LEFT" | |
| 184 WIDTH="100%"><TABLE | |
|
803
355632dca928
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Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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185 SUMMARY="Footer navigation table" |
| 0 | 186 WIDTH="100%" |
| 187 BORDER="0" | |
| 188 CELLPADDING="0" | |
| 189 CELLSPACING="0" | |
| 190 ><TR | |
| 191 ><TD | |
| 192 WIDTH="33%" | |
| 193 ALIGN="left" | |
| 194 VALIGN="top" | |
| 195 ><A | |
| 196 HREF="sdlquitsubsystem.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
197 ACCESSKEY="P" |
| 0 | 198 >Prev</A |
| 199 ></TD | |
| 200 ><TD | |
| 201 WIDTH="34%" | |
| 202 ALIGN="center" | |
| 203 VALIGN="top" | |
| 204 ><A | |
| 205 HREF="index.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
206 ACCESSKEY="H" |
| 0 | 207 >Home</A |
| 208 ></TD | |
| 209 ><TD | |
| 210 WIDTH="33%" | |
| 211 ALIGN="right" | |
| 212 VALIGN="top" | |
| 213 ><A | |
| 214 HREF="sdlwasinit.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
215 ACCESSKEY="N" |
| 0 | 216 >Next</A |
| 217 ></TD | |
| 218 ></TR | |
| 219 ><TR | |
| 220 ><TD | |
| 221 WIDTH="33%" | |
| 222 ALIGN="left" | |
| 223 VALIGN="top" | |
| 224 >SDL_QuitSubSystem</TD | |
| 225 ><TD | |
| 226 WIDTH="34%" | |
| 227 ALIGN="center" | |
| 228 VALIGN="top" | |
| 229 ><A | |
| 230 HREF="general.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
231 ACCESSKEY="U" |
| 0 | 232 >Up</A |
| 233 ></TD | |
| 234 ><TD | |
| 235 WIDTH="33%" | |
| 236 ALIGN="right" | |
| 237 VALIGN="top" | |
| 238 >SDL_WasInit</TD | |
| 239 ></TR | |
| 240 ></TABLE | |
| 241 ></DIV | |
| 242 ></BODY | |
| 243 ></HTML | |
| 244 > |