Mercurial > sdl-ios-xcode
annotate docs/html/event.html @ 4106:12bb6311fd5d SDL-1.2
Hans de Goede fixed bug #495
When running boswars: http://www.boswars.org/ on a machine with intel
integrathed graphics it crashes when it tries to play the initial theora
splashscreen video:
X Error of failed request: BadAlloc (insufficient resources for operation)
Major opcode of failed request: 140 (XVideo)
Minor opcode of failed request: 19 ()
Serial number of failed request: 25
Current serial number in output stream: 26
boswars: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed.
Aborted
I recognized this problem from a few years back, when I encountered it while
working on the Xv blitter for xmame. The problem is that for some reason
creation the Xvport and XvImage succeeds, and failure (lack of resources / hw
capability?) is only indicated during the first XvPut[Shm]Image. I've written a
patch for SDL using the work around for this I developed for xmame (and which
is still used successfully in xmame after many years of usage).
I'll admit it isn't very pretty, but after investigating several possibilities
this was the best option, any other fixes would need changes to the SDL api and
abi.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 29 Dec 2007 02:23:48 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Events</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="SDL Reference" | |
| 14 HREF="reference.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_WM_GrabInput" | |
| 17 HREF="sdlwmgrabinput.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL Event Structures." | |
| 20 HREF="eventstructures.html"><META | |
| 21 NAME="KEYWORD" | |
| 22 CONTENT="events"><META | |
| 23 NAME="KEYWORD" | |
| 24 CONTENT="function"></HEAD | |
| 25 ><BODY | |
| 26 CLASS="CHAPTER" | |
| 27 BGCOLOR="#FFF8DC" | |
| 28 TEXT="#000000" | |
| 29 LINK="#0000ee" | |
| 30 VLINK="#551a8b" | |
| 31 ALINK="#ff0000" | |
| 32 ><DIV | |
| 33 CLASS="NAVHEADER" | |
| 34 ><TABLE | |
|
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35 SUMMARY="Header navigation table" |
| 0 | 36 WIDTH="100%" |
| 37 BORDER="0" | |
| 38 CELLPADDING="0" | |
| 39 CELLSPACING="0" | |
| 40 ><TR | |
| 41 ><TH | |
| 42 COLSPAN="3" | |
| 43 ALIGN="center" | |
| 44 >SDL Library Documentation</TH | |
| 45 ></TR | |
| 46 ><TR | |
| 47 ><TD | |
| 48 WIDTH="10%" | |
| 49 ALIGN="left" | |
| 50 VALIGN="bottom" | |
| 51 ><A | |
| 52 HREF="sdlwmgrabinput.html" | |
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53 ACCESSKEY="P" |
| 0 | 54 >Prev</A |
| 55 ></TD | |
| 56 ><TD | |
| 57 WIDTH="80%" | |
| 58 ALIGN="center" | |
| 59 VALIGN="bottom" | |
| 60 ></TD | |
| 61 ><TD | |
| 62 WIDTH="10%" | |
| 63 ALIGN="right" | |
| 64 VALIGN="bottom" | |
| 65 ><A | |
| 66 HREF="eventstructures.html" | |
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67 ACCESSKEY="N" |
| 0 | 68 >Next</A |
| 69 ></TD | |
| 70 ></TR | |
| 71 ></TABLE | |
| 72 ><HR | |
| 73 ALIGN="LEFT" | |
| 74 WIDTH="100%"></DIV | |
| 75 ><DIV | |
| 76 CLASS="CHAPTER" | |
| 77 ><H1 | |
| 78 ><A | |
| 79 NAME="EVENT" | |
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80 ></A |
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81 >Chapter 8. Events</H1 |
| 0 | 82 ><DIV |
| 83 CLASS="TOC" | |
| 84 ><DL | |
| 85 ><DT | |
| 86 ><B | |
| 87 >Table of Contents</B | |
| 88 ></DT | |
| 89 ><DT | |
| 90 ><A | |
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91 HREF="event.html#AEN3691" |
| 0 | 92 >Introduction</A |
| 93 ></DT | |
| 94 ><DT | |
| 95 ><A | |
| 96 HREF="eventstructures.html" | |
| 97 >SDL Event Structures.</A | |
| 98 ></DT | |
| 99 ><DT | |
| 100 ><A | |
| 101 HREF="eventfunctions.html" | |
| 102 >Event Functions.</A | |
| 103 ></DT | |
| 104 ></DL | |
| 105 ></DIV | |
| 106 ><DIV | |
| 107 CLASS="SECT1" | |
| 108 ><H1 | |
| 109 CLASS="SECT1" | |
| 110 ><A | |
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111 NAME="AEN3691" |
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112 ></A |
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113 >Introduction</H1 |
| 0 | 114 ><P |
| 115 >Event handling allows your application to receive input from the user. Event handling is initalised (along with video) with a call to: | |
| 116 <PRE | |
| 117 CLASS="PROGRAMLISTING" | |
| 118 >SDL_Init(SDL_INIT_VIDEO);</PRE | |
| 119 > | |
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120 Internally, SDL stores all the events waiting to be handled in an event queue. Using functions like <A |
| 0 | 121 HREF="sdlpollevent.html" |
| 122 ><TT | |
| 123 CLASS="FUNCTION" | |
| 124 >SDL_PollEvent</TT | |
| 125 ></A | |
| 126 > and <A | |
| 127 HREF="sdlpeepevents.html" | |
| 128 ><TT | |
| 129 CLASS="FUNCTION" | |
| 130 >SDL_PeepEvents</TT | |
| 131 ></A | |
| 132 > you can observe and handle waiting input events.</P | |
| 133 ><P | |
| 134 >The key to event handling in SDL is the <A | |
| 135 HREF="sdlevent.html" | |
| 136 ><SPAN | |
| 137 CLASS="STRUCTNAME" | |
| 138 >SDL_Event</SPAN | |
| 139 ></A | |
| 140 > union. The event queue itself is composed of a series of <SPAN | |
| 141 CLASS="STRUCTNAME" | |
| 142 >SDL_Event</SPAN | |
| 143 > unions, one for each waiting event. <SPAN | |
| 144 CLASS="STRUCTNAME" | |
| 145 >SDL_Event</SPAN | |
| 146 > unions are read from the queue with the <TT | |
| 147 CLASS="FUNCTION" | |
| 148 >SDL_PollEvent</TT | |
| 149 > function and it is then up to the application to process the information stored with them.</P | |
| 150 ></DIV | |
| 151 ></DIV | |
| 152 ><DIV | |
| 153 CLASS="NAVFOOTER" | |
| 154 ><HR | |
| 155 ALIGN="LEFT" | |
| 156 WIDTH="100%"><TABLE | |
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157 SUMMARY="Footer navigation table" |
| 0 | 158 WIDTH="100%" |
| 159 BORDER="0" | |
| 160 CELLPADDING="0" | |
| 161 CELLSPACING="0" | |
| 162 ><TR | |
| 163 ><TD | |
| 164 WIDTH="33%" | |
| 165 ALIGN="left" | |
| 166 VALIGN="top" | |
| 167 ><A | |
| 168 HREF="sdlwmgrabinput.html" | |
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parents:
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169 ACCESSKEY="P" |
| 0 | 170 >Prev</A |
| 171 ></TD | |
| 172 ><TD | |
| 173 WIDTH="34%" | |
| 174 ALIGN="center" | |
| 175 VALIGN="top" | |
| 176 ><A | |
| 177 HREF="index.html" | |
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parents:
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178 ACCESSKEY="H" |
| 0 | 179 >Home</A |
| 180 ></TD | |
| 181 ><TD | |
| 182 WIDTH="33%" | |
| 183 ALIGN="right" | |
| 184 VALIGN="top" | |
| 185 ><A | |
| 186 HREF="eventstructures.html" | |
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parents:
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187 ACCESSKEY="N" |
| 0 | 188 >Next</A |
| 189 ></TD | |
| 190 ></TR | |
| 191 ><TR | |
| 192 ><TD | |
| 193 WIDTH="33%" | |
| 194 ALIGN="left" | |
| 195 VALIGN="top" | |
| 196 >SDL_WM_GrabInput</TD | |
| 197 ><TD | |
| 198 WIDTH="34%" | |
| 199 ALIGN="center" | |
| 200 VALIGN="top" | |
| 201 ><A | |
| 202 HREF="reference.html" | |
|
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parents:
181
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203 ACCESSKEY="U" |
| 0 | 204 >Up</A |
| 205 ></TD | |
| 206 ><TD | |
| 207 WIDTH="33%" | |
| 208 ALIGN="right" | |
| 209 VALIGN="top" | |
| 210 >SDL Event Structures.</TD | |
| 211 ></TR | |
| 212 ></TABLE | |
| 213 ></DIV | |
| 214 ></BODY | |
| 215 ></HTML | |
| 216 > |