Mercurial > sdl-ios-xcode
annotate docs/html/sdlactiveevent.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_ActiveEvent</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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="SDL Event Structures." | |
| 14 HREF="eventstructures.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_Event" | |
| 17 HREF="sdlevent.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_KeyboardEvent" | |
| 20 HREF="sdlkeyboardevent.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 | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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="sdlevent.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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="sdlkeyboardevent.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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="SDLACTIVEEVENT" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
74 ></A |
|
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
75 >SDL_ActiveEvent</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
79 NAME="AEN3955" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_ActiveEvent -- Application visibility event structure</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
87 NAME="AEN3958" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 Uint8 type; | |
| 95 Uint8 gain; | |
| 96 Uint8 state; | |
| 97 } SDL_ActiveEvent;</PRE | |
| 98 ></DIV | |
| 99 ><DIV | |
| 100 CLASS="REFSECT1" | |
| 101 ><A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
102 NAME="AEN3961" |
| 0 | 103 ></A |
| 104 ><H2 | |
| 105 >Structure Data</H2 | |
| 106 ><DIV | |
| 107 CLASS="INFORMALTABLE" | |
| 108 ><A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
109 NAME="AEN3963" |
| 0 | 110 ></A |
| 111 ><P | |
| 112 ></P | |
| 113 ><TABLE | |
| 114 BORDER="0" | |
| 115 CLASS="CALSTABLE" | |
| 116 ><TBODY | |
| 117 ><TR | |
| 118 ><TD | |
| 119 ALIGN="LEFT" | |
| 120 VALIGN="TOP" | |
| 121 ><TT | |
| 122 CLASS="STRUCTFIELD" | |
| 123 ><I | |
| 124 >type</I | |
| 125 ></TT | |
| 126 ></TD | |
| 127 ><TD | |
| 128 ALIGN="LEFT" | |
| 129 VALIGN="TOP" | |
| 130 ><TT | |
| 131 CLASS="LITERAL" | |
| 132 >SDL_ACTIVEEVENT.</TT | |
| 133 ></TD | |
| 134 ></TR | |
| 135 ><TR | |
| 136 ><TD | |
| 137 ALIGN="LEFT" | |
| 138 VALIGN="TOP" | |
| 139 ><TT | |
| 140 CLASS="STRUCTFIELD" | |
| 141 ><I | |
| 142 >gain</I | |
| 143 ></TT | |
| 144 ></TD | |
| 145 ><TD | |
| 146 ALIGN="LEFT" | |
| 147 VALIGN="TOP" | |
| 148 >0 if the event is a loss or 1 if it is a gain.</TD | |
| 149 ></TR | |
| 150 ><TR | |
| 151 ><TD | |
| 152 ALIGN="LEFT" | |
| 153 VALIGN="TOP" | |
| 154 ><TT | |
| 155 CLASS="STRUCTFIELD" | |
| 156 ><I | |
| 157 >state</I | |
| 158 ></TT | |
| 159 ></TD | |
| 160 ><TD | |
| 161 ALIGN="LEFT" | |
| 162 VALIGN="TOP" | |
| 163 ><TT | |
| 164 CLASS="LITERAL" | |
| 165 >SDL_APPMOUSEFOCUS</TT | |
| 166 > if mouse focus was gained or lost, <TT | |
| 167 CLASS="LITERAL" | |
| 168 >SDL_APPINPUTFOCUS</TT | |
| 169 > if input focus was gained or lost, or <TT | |
| 170 CLASS="LITERAL" | |
| 171 >SDL_APPACTIVE</TT | |
| 172 > if the application was iconified (<TT | |
| 173 CLASS="STRUCTFIELD" | |
| 174 ><I | |
| 175 >gain</I | |
| 176 ></TT | |
| 177 >=0) or restored(<TT | |
| 178 CLASS="STRUCTFIELD" | |
| 179 ><I | |
| 180 >gain</I | |
| 181 ></TT | |
| 182 >=1).</TD | |
| 183 ></TR | |
| 184 ></TBODY | |
| 185 ></TABLE | |
| 186 ><P | |
| 187 ></P | |
| 188 ></DIV | |
| 189 ></DIV | |
| 190 ><DIV | |
| 191 CLASS="REFSECT1" | |
| 192 ><A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
193 NAME="AEN3984" |
| 0 | 194 ></A |
| 195 ><H2 | |
| 196 >Description</H2 | |
| 197 ><P | |
| 198 ><SPAN | |
| 199 CLASS="STRUCTNAME" | |
| 200 >SDL_ActiveEvent</SPAN | |
| 201 > is a member of the <A | |
| 202 HREF="sdlevent.html" | |
| 203 ><SPAN | |
| 204 CLASS="STRUCTNAME" | |
| 205 >SDL_Event</SPAN | |
| 206 ></A | |
| 207 > union and is used when an event of type <TT | |
| 208 CLASS="LITERAL" | |
| 209 >SDL_ACTIVEEVENT</TT | |
| 210 > is reported.</P | |
| 211 ><P | |
| 212 >When the mouse leaves or enters the window area a <TT | |
| 213 CLASS="LITERAL" | |
| 214 >SDL_APPMOUSEFOCUS</TT | |
| 215 > type activation event occurs, if the mouse entered the window then <TT | |
| 216 CLASS="STRUCTFIELD" | |
| 217 ><I | |
| 218 >gain</I | |
| 219 ></TT | |
| 220 > will be 1, otherwise <TT | |
| 221 CLASS="STRUCTFIELD" | |
| 222 ><I | |
| 223 >gain</I | |
| 224 ></TT | |
| 225 > will be 0. A <TT | |
| 226 CLASS="LITERAL" | |
| 227 >SDL_APPINPUTFOCUS</TT | |
| 228 > type activation event occurs when the application loses or gains keyboard focus. This usually occurs when another application is made active. Finally, a <TT | |
| 229 CLASS="LITERAL" | |
| 230 >SDL_APPACTIVE</TT | |
| 231 > type event occurs when the application is either minimised/iconified (<TT | |
| 232 CLASS="STRUCTFIELD" | |
| 233 ><I | |
| 234 >gain</I | |
| 235 ></TT | |
| 236 >=0) or restored.</P | |
| 237 ><DIV | |
| 238 CLASS="NOTE" | |
| 239 ><BLOCKQUOTE | |
| 240 CLASS="NOTE" | |
| 241 ><P | |
| 242 ><B | |
| 243 >Note: </B | |
| 244 >This event does not occur when an application window is first created.</P | |
| 245 ></BLOCKQUOTE | |
| 246 ></DIV | |
| 247 ></DIV | |
| 248 ><DIV | |
| 249 CLASS="REFSECT1" | |
| 250 ><A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
251 NAME="AEN4000" |
| 0 | 252 ></A |
| 253 ><H2 | |
| 254 >See Also</H2 | |
| 255 ><P | |
| 256 ><A | |
| 257 HREF="sdlevent.html" | |
| 258 ><SPAN | |
| 259 CLASS="STRUCTNAME" | |
| 260 >SDL_Event</SPAN | |
| 261 ></A | |
| 262 >, | |
| 263 <A | |
| 264 HREF="sdlgetappstate.html" | |
| 265 ><TT | |
| 266 CLASS="FUNCTION" | |
| 267 >SDL_GetAppState</TT | |
| 268 ></A | |
| 269 ></P | |
| 270 ></DIV | |
| 271 ><DIV | |
| 272 CLASS="NAVFOOTER" | |
| 273 ><HR | |
| 274 ALIGN="LEFT" | |
| 275 WIDTH="100%"><TABLE | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
276 SUMMARY="Footer navigation table" |
| 0 | 277 WIDTH="100%" |
| 278 BORDER="0" | |
| 279 CELLPADDING="0" | |
| 280 CELLSPACING="0" | |
| 281 ><TR | |
| 282 ><TD | |
| 283 WIDTH="33%" | |
| 284 ALIGN="left" | |
| 285 VALIGN="top" | |
| 286 ><A | |
| 287 HREF="sdlevent.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
288 ACCESSKEY="P" |
| 0 | 289 >Prev</A |
| 290 ></TD | |
| 291 ><TD | |
| 292 WIDTH="34%" | |
| 293 ALIGN="center" | |
| 294 VALIGN="top" | |
| 295 ><A | |
| 296 HREF="index.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
297 ACCESSKEY="H" |
| 0 | 298 >Home</A |
| 299 ></TD | |
| 300 ><TD | |
| 301 WIDTH="33%" | |
| 302 ALIGN="right" | |
| 303 VALIGN="top" | |
| 304 ><A | |
| 305 HREF="sdlkeyboardevent.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
306 ACCESSKEY="N" |
| 0 | 307 >Next</A |
| 308 ></TD | |
| 309 ></TR | |
| 310 ><TR | |
| 311 ><TD | |
| 312 WIDTH="33%" | |
| 313 ALIGN="left" | |
| 314 VALIGN="top" | |
| 315 >SDL_Event</TD | |
| 316 ><TD | |
| 317 WIDTH="34%" | |
| 318 ALIGN="center" | |
| 319 VALIGN="top" | |
| 320 ><A | |
| 321 HREF="eventstructures.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
322 ACCESSKEY="U" |
| 0 | 323 >Up</A |
| 324 ></TD | |
| 325 ><TD | |
| 326 WIDTH="33%" | |
| 327 ALIGN="right" | |
| 328 VALIGN="top" | |
| 329 >SDL_KeyboardEvent</TD | |
| 330 ></TR | |
| 331 ></TABLE | |
| 332 ></DIV | |
| 333 ></BODY | |
| 334 ></HTML | |
| 335 > |