Mercurial > sdl-ios-xcode
annotate docs/html/sdlinitsubsystem.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_InitSubSystem</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_Init" | |
| 17 HREF="sdlinit.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_QuitSubSystem" | |
| 20 HREF="sdlquitsubsystem.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="sdlinit.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="sdlquitsubsystem.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="SDLINITSUBSYSTEM" | |
|
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74 ></A |
|
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75 >SDL_InitSubSystem</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
|
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79 NAME="AEN510" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_InitSubSystem -- Initialize subsystems</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN513" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
|
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94 NAME="AEN514" |
| 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_InitSubSystem</B | |
| 108 ></CODE | |
| 109 >(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="AEN520" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >After SDL has been initialized with <A | |
| 124 HREF="sdlinit.html" | |
| 125 ><TT | |
| 126 CLASS="FUNCTION" | |
| 127 >SDL_Init</TT | |
| 128 ></A | |
| 129 > you may initialize uninitialized subsystems with <TT | |
| 130 CLASS="FUNCTION" | |
| 131 >SDL_InitSubSystem</TT | |
| 132 >. The <TT | |
| 133 CLASS="PARAMETER" | |
| 134 ><I | |
| 135 >flags</I | |
| 136 ></TT | |
| 137 > parameter is the same as that used in <A | |
| 138 HREF="sdlinit.html" | |
| 139 ><TT | |
| 140 CLASS="FUNCTION" | |
| 141 >SDL_Init</TT | |
| 142 ></A | |
| 143 >.</P | |
| 144 ></DIV | |
| 145 ><DIV | |
| 146 CLASS="REFSECT1" | |
| 147 ><A | |
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148 NAME="AEN529" |
| 0 | 149 ></A |
| 150 ><H2 | |
| 151 >Examples</H2 | |
| 152 ><PRE | |
| 153 CLASS="PROGRAMLISTING" | |
| 154 >/* Seperating Joystick and Video initialization. */ | |
| 155 SDL_Init(SDL_INIT_VIDEO); | |
| 156 . | |
| 157 . | |
| 158 SDL_SetVideoMode(640, 480, 16, SDL_DOUBLEBUF|SDL_FULLSCREEN); | |
| 159 . | |
| 160 /* Do Some Video stuff */ | |
| 161 . | |
| 162 . | |
| 163 /* Initialize the joystick subsystem */ | |
| 164 SDL_InitSubSystem(SDL_INIT_JOYSTICK); | |
| 165 | |
| 166 /* Do some stuff with video and joystick */ | |
| 167 . | |
| 168 . | |
| 169 . | |
| 170 /* Shut them both down */ | |
| 171 SDL_Quit();</PRE | |
| 172 ></DIV | |
| 173 ><DIV | |
| 174 CLASS="REFSECT1" | |
| 175 ><A | |
|
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176 NAME="AEN532" |
| 0 | 177 ></A |
| 178 ><H2 | |
| 179 >Return Value</H2 | |
| 180 ><P | |
| 181 >Returns <SPAN | |
| 182 CLASS="RETURNVALUE" | |
| 183 >-1</SPAN | |
| 184 > on an error or <SPAN | |
| 185 CLASS="RETURNVALUE" | |
| 186 >0</SPAN | |
| 187 > on success.</P | |
| 188 ></DIV | |
| 189 ><DIV | |
| 190 CLASS="REFSECT1" | |
| 191 ><A | |
|
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192 NAME="AEN537" |
| 0 | 193 ></A |
| 194 ><H2 | |
| 195 >See Also</H2 | |
| 196 ><P | |
| 197 ><A | |
| 198 HREF="sdlinit.html" | |
| 199 ><TT | |
| 200 CLASS="FUNCTION" | |
| 201 >SDL_Init</TT | |
| 202 ></A | |
| 203 >, | |
| 204 <A | |
| 205 HREF="sdlquit.html" | |
| 206 ><TT | |
| 207 CLASS="FUNCTION" | |
| 208 >SDL_Quit</TT | |
| 209 ></A | |
| 210 >, | |
| 211 <A | |
| 212 HREF="sdlquitsubsystem.html" | |
| 213 ><TT | |
| 214 CLASS="FUNCTION" | |
| 215 >SDL_QuitSubSystem</TT | |
| 216 ></A | |
| 217 ></P | |
| 218 ></DIV | |
| 219 ><DIV | |
| 220 CLASS="NAVFOOTER" | |
| 221 ><HR | |
| 222 ALIGN="LEFT" | |
| 223 WIDTH="100%"><TABLE | |
|
803
355632dca928
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parents:
55
diff
changeset
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224 SUMMARY="Footer navigation table" |
| 0 | 225 WIDTH="100%" |
| 226 BORDER="0" | |
| 227 CELLPADDING="0" | |
| 228 CELLSPACING="0" | |
| 229 ><TR | |
| 230 ><TD | |
| 231 WIDTH="33%" | |
| 232 ALIGN="left" | |
| 233 VALIGN="top" | |
| 234 ><A | |
| 235 HREF="sdlinit.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
236 ACCESSKEY="P" |
| 0 | 237 >Prev</A |
| 238 ></TD | |
| 239 ><TD | |
| 240 WIDTH="34%" | |
| 241 ALIGN="center" | |
| 242 VALIGN="top" | |
| 243 ><A | |
| 244 HREF="index.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
245 ACCESSKEY="H" |
| 0 | 246 >Home</A |
| 247 ></TD | |
| 248 ><TD | |
| 249 WIDTH="33%" | |
| 250 ALIGN="right" | |
| 251 VALIGN="top" | |
| 252 ><A | |
| 253 HREF="sdlquitsubsystem.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
254 ACCESSKEY="N" |
| 0 | 255 >Next</A |
| 256 ></TD | |
| 257 ></TR | |
| 258 ><TR | |
| 259 ><TD | |
| 260 WIDTH="33%" | |
| 261 ALIGN="left" | |
| 262 VALIGN="top" | |
| 263 >SDL_Init</TD | |
| 264 ><TD | |
| 265 WIDTH="34%" | |
| 266 ALIGN="center" | |
| 267 VALIGN="top" | |
| 268 ><A | |
| 269 HREF="general.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
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270 ACCESSKEY="U" |
| 0 | 271 >Up</A |
| 272 ></TD | |
| 273 ><TD | |
| 274 WIDTH="33%" | |
| 275 ALIGN="right" | |
| 276 VALIGN="top" | |
| 277 >SDL_QuitSubSystem</TD | |
| 278 ></TR | |
| 279 ></TABLE | |
| 280 ></DIV | |
| 281 ></BODY | |
| 282 ></HTML | |
| 283 > |