annotate docs/html/sdljoyaxisevent.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
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4 >SDL_JoyAxisEvent</TITLE
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6 NAME="GENERATOR"
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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13 TITLE="SDL Event Structures."
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39 ALIGN="center"
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40 >SDL Library Documentation</TH
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49 ACCESSKEY="P"
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61 ><A
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62 HREF="sdljoybuttonevent.html"
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72 ><A
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73 NAME="SDLJOYAXISEVENT"
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74 ></A
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75 >SDL_JoyAxisEvent</H1
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82 >Name</H2
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83 >SDL_JoyAxisEvent&nbsp;--&nbsp;Joystick axis motion event structure</DIV
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84 ><DIV
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90 >Structure Definition</H2
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91 ><PRE
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92 CLASS="PROGRAMLISTING"
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93 >typedef struct{
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94 Uint8 type;
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95 Uint8 which;
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96 Uint8 axis;
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97 Sint16 value;
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98 } SDL_JoyAxisEvent;</PRE
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99 ></DIV
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102 ><A
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105 ><H2
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106 >Structure Data</H2
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131 ><TT
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132 CLASS="LITERAL"
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133 >SDL_JOYAXISMOTION</TT
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134 ></TD
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140 ><TT
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142 ><I
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143 >which</I
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144 ></TT
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149 >Joystick device index</TD
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150 ></TR
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155 ><TT
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156 CLASS="STRUCTFIELD"
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157 ><I
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158 >axis</I
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159 ></TT
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160 ></TD
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161 ><TD
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164 >Joystick axis index</TD
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165 ></TR
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166 ><TR
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170 ><TT
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171 CLASS="STRUCTFIELD"
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172 ><I
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173 >value</I
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174 ></TT
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175 ></TD
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176 ><TD
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177 ALIGN="LEFT"
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178 VALIGN="TOP"
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179 >Axis value (range: -32768 to 32767)</TD
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180 ></TR
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181 ></TBODY
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182 ></TABLE
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183 ><P
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184 ></P
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185 ></DIV
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186 ></DIV
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187 ><DIV
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188 CLASS="REFSECT1"
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189 ><A
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190 NAME="AEN4231"
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191 ></A
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192 ><H2
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193 >Description</H2
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194 ><P
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195 ><SPAN
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196 CLASS="STRUCTNAME"
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197 >SDL_JoyAxisEvent</SPAN
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198 > is a member of the <A
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199 HREF="sdlevent.html"
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200 ><SPAN
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201 CLASS="STRUCTNAME"
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202 >SDL_Event</SPAN
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203 ></A
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204 > union and is used when an event of type <TT
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205 CLASS="LITERAL"
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206 >SDL_JOYAXISMOTION</TT
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207 > is reported.</P
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208 ><P
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209 >A <TT
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210 CLASS="LITERAL"
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211 >SDL_JOYAXISMOTION</TT
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212 > event occurs when ever a user moves an axis on the joystick. The field <TT
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213 CLASS="STRUCTFIELD"
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214 ><I
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215 >which</I
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216 ></TT
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217 > is the index of the joystick that reported the event and <TT
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218 CLASS="STRUCTFIELD"
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219 ><I
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220 >axis</I
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221 ></TT
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222 > is the index of the axis (for a more detailed explaination see the <A
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223 HREF="joystick.html"
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224 >Joystick section</A
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225 >). <TT
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226 CLASS="STRUCTFIELD"
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227 ><I
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228 >value</I
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229 ></TT
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230 > is the current position of the axis.</P
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231 ></DIV
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232 ><DIV
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233 CLASS="REFSECT1"
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234 ><A
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235 NAME="AEN4244"
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236 ></A
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237 ><H2
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238 >See Also</H2
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239 ><P
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240 ><A
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241 HREF="sdlevent.html"
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242 ><SPAN
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243 CLASS="STRUCTNAME"
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244 >SDL_Event</SPAN
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245 ></A
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246 >,
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247 <A
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248 HREF="joystick.html"
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249 >Joystick Functions</A
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250 >,
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251 <A
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252 HREF="sdljoystickeventstate.html"
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253 ><TT
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254 CLASS="FUNCTION"
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255 >SDL_JoystickEventState</TT
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256 ></A
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257 >,
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258 <A
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259 HREF="sdljoystickgetaxis.html"
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260 ><TT
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261 CLASS="FUNCTION"
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262 >SDL_JoystickGetAxis</TT
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263 ></A
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264 ></P
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265 ></DIV
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266 ><DIV
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267 CLASS="NAVFOOTER"
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268 ><HR
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269 ALIGN="LEFT"
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270 WIDTH="100%"><TABLE
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271 SUMMARY="Footer navigation table"
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272 WIDTH="100%"
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273 BORDER="0"
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274 CELLPADDING="0"
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275 CELLSPACING="0"
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276 ><TR
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277 ><TD
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278 WIDTH="33%"
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279 ALIGN="left"
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280 VALIGN="top"
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281 ><A
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282 HREF="sdlmousebuttonevent.html"
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283 ACCESSKEY="P"
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284 >Prev</A
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285 ></TD
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286 ><TD
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287 WIDTH="34%"
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288 ALIGN="center"
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289 VALIGN="top"
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290 ><A
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291 HREF="index.html"
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292 ACCESSKEY="H"
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293 >Home</A
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294 ></TD
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295 ><TD
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296 WIDTH="33%"
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297 ALIGN="right"
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298 VALIGN="top"
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299 ><A
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300 HREF="sdljoybuttonevent.html"
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301 ACCESSKEY="N"
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302 >Next</A
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303 ></TD
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304 ></TR
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305 ><TR
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306 ><TD
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307 WIDTH="33%"
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308 ALIGN="left"
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309 VALIGN="top"
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310 >SDL_MouseButtonEvent</TD
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311 ><TD
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312 WIDTH="34%"
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313 ALIGN="center"
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314 VALIGN="top"
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315 ><A
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316 HREF="eventstructures.html"
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317 ACCESSKEY="U"
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318 >Up</A
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319 ></TD
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320 ><TD
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321 WIDTH="33%"
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322 ALIGN="right"
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323 VALIGN="top"
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324 >SDL_JoyButtonEvent</TD
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325 ></TR
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326 ></TABLE
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327 ></DIV
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328 ></BODY
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329 ></HTML
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330 >