Mercurial > sdl-ios-xcode
annotate docs/html/sdlmousemotionevent.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> |
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date | Sat, 29 Dec 2007 02:23:48 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_MouseMotionEvent</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 Event Structures." | |
14 HREF="eventstructures.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_KeyboardEvent" | |
17 HREF="sdlkeyboardevent.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_MouseButtonEvent" | |
20 HREF="sdlmousebuttonevent.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="sdlkeyboardevent.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="sdlmousebuttonevent.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="SDLMOUSEMOTIONEVENT" | |
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74 ></A |
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75 >SDL_MouseMotionEvent</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN4079" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_MouseMotionEvent -- Mouse motion event structure</DIV | |
84 ><DIV | |
85 CLASS="REFSECT1" | |
86 ><A | |
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87 NAME="AEN4082" |
0 | 88 ></A |
89 ><H2 | |
90 >Structure Definition</H2 | |
91 ><PRE | |
92 CLASS="PROGRAMLISTING" | |
93 >typedef struct{ | |
94 Uint8 type; | |
95 Uint8 state; | |
96 Uint16 x, y; | |
97 Sint16 xrel, yrel; | |
98 } SDL_MouseMotionEvent;</PRE | |
99 ></DIV | |
100 ><DIV | |
101 CLASS="REFSECT1" | |
102 ><A | |
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103 NAME="AEN4085" |
0 | 104 ></A |
105 ><H2 | |
106 >Structure Data</H2 | |
107 ><DIV | |
108 CLASS="INFORMALTABLE" | |
109 ><A | |
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110 NAME="AEN4087" |
0 | 111 ></A |
112 ><P | |
113 ></P | |
114 ><TABLE | |
115 BORDER="0" | |
116 CLASS="CALSTABLE" | |
117 ><TBODY | |
118 ><TR | |
119 ><TD | |
120 ALIGN="LEFT" | |
121 VALIGN="TOP" | |
122 ><TT | |
123 CLASS="STRUCTFIELD" | |
124 ><I | |
125 >type</I | |
126 ></TT | |
127 ></TD | |
128 ><TD | |
129 ALIGN="LEFT" | |
130 VALIGN="TOP" | |
131 ><TT | |
132 CLASS="LITERAL" | |
133 >SDL_MOUSEMOTION</TT | |
134 ></TD | |
135 ></TR | |
136 ><TR | |
137 ><TD | |
138 ALIGN="LEFT" | |
139 VALIGN="TOP" | |
140 ><TT | |
141 CLASS="STRUCTFIELD" | |
142 ><I | |
143 >state</I | |
144 ></TT | |
145 ></TD | |
146 ><TD | |
147 ALIGN="LEFT" | |
148 VALIGN="TOP" | |
149 >The current button state</TD | |
150 ></TR | |
151 ><TR | |
152 ><TD | |
153 ALIGN="LEFT" | |
154 VALIGN="TOP" | |
155 ><TT | |
156 CLASS="STRUCTFIELD" | |
157 ><I | |
158 >x</I | |
159 ></TT | |
160 >, <TT | |
161 CLASS="STRUCTFIELD" | |
162 ><I | |
163 >y</I | |
164 ></TT | |
165 ></TD | |
166 ><TD | |
167 ALIGN="LEFT" | |
168 VALIGN="TOP" | |
169 >The X/Y coordinates of the mouse</TD | |
170 ></TR | |
171 ><TR | |
172 ><TD | |
173 ALIGN="LEFT" | |
174 VALIGN="TOP" | |
175 ><TT | |
176 CLASS="STRUCTFIELD" | |
177 ><I | |
178 >xrel</I | |
179 ></TT | |
180 >, <TT | |
181 CLASS="STRUCTFIELD" | |
182 ><I | |
183 >yrel</I | |
184 ></TT | |
185 ></TD | |
186 ><TD | |
187 ALIGN="LEFT" | |
188 VALIGN="TOP" | |
189 >Relative motion in the X/Y direction</TD | |
190 ></TR | |
191 ></TBODY | |
192 ></TABLE | |
193 ><P | |
194 ></P | |
195 ></DIV | |
196 ></DIV | |
197 ><DIV | |
198 CLASS="REFSECT1" | |
199 ><A | |
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200 NAME="AEN4109" |
0 | 201 ></A |
202 ><H2 | |
203 >Description</H2 | |
204 ><P | |
205 ><SPAN | |
206 CLASS="STRUCTNAME" | |
207 >SDL_MouseMotionEvent</SPAN | |
208 > is a member of the <A | |
209 HREF="sdlevent.html" | |
210 ><SPAN | |
211 CLASS="STRUCTNAME" | |
212 >SDL_Event</SPAN | |
213 ></A | |
214 > union and is used when an event of type <TT | |
215 CLASS="LITERAL" | |
216 >SDL_MOUSEMOTION</TT | |
217 > is reported.</P | |
218 ><P | |
219 >Simply put, a <TT | |
220 CLASS="LITERAL" | |
221 >SDL_MOUSEMOTION</TT | |
222 > type event occurs when a user moves the mouse within the application window or when <A | |
223 HREF="sdlwarpmouse.html" | |
224 ><TT | |
225 CLASS="FUNCTION" | |
226 >SDL_WarpMouse</TT | |
227 ></A | |
228 > is called. Both the absolute (<TT | |
229 CLASS="STRUCTFIELD" | |
230 ><I | |
231 >x</I | |
232 ></TT | |
233 > and <TT | |
234 CLASS="STRUCTFIELD" | |
235 ><I | |
236 >y</I | |
237 ></TT | |
238 >) and relative (<TT | |
239 CLASS="STRUCTFIELD" | |
240 ><I | |
241 >xrel</I | |
242 ></TT | |
243 > and <TT | |
244 CLASS="STRUCTFIELD" | |
245 ><I | |
246 >yrel</I | |
247 ></TT | |
248 >) coordinates are reported along with the current button states (<TT | |
249 CLASS="STRUCTFIELD" | |
250 ><I | |
251 >state</I | |
252 ></TT | |
253 >). The button state can be interpreted using the <TT | |
254 CLASS="LITERAL" | |
255 >SDL_BUTTON</TT | |
256 > macro (see <A | |
257 HREF="sdlgetmousestate.html" | |
258 ><TT | |
259 CLASS="FUNCTION" | |
260 >SDL_GetMouseState</TT | |
261 ></A | |
262 >).</P | |
263 ><P | |
264 >If the cursor is hidden (<A | |
265 HREF="sdlshowcursor.html" | |
266 ><TT | |
267 CLASS="FUNCTION" | |
268 >SDL_ShowCursor</TT | |
269 >(0)</A | |
270 >) and the input is grabbed (<A | |
271 HREF="sdlwmgrabinput.html" | |
272 ><TT | |
273 CLASS="FUNCTION" | |
274 >SDL_WM_GrabInput</TT | |
275 >(SDL_GRAB_ON)</A | |
276 >), then the mouse will give relative motion events even when the cursor reaches the edge fo the screen. This is currently only implemented on Windows and Linux/Unix-a-likes.</P | |
277 ></DIV | |
278 ><DIV | |
279 CLASS="REFSECT1" | |
280 ><A | |
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281 NAME="AEN4133" |
0 | 282 ></A |
283 ><H2 | |
284 >See Also</H2 | |
285 ><P | |
286 ><A | |
287 HREF="sdlevent.html" | |
288 ><SPAN | |
289 CLASS="STRUCTNAME" | |
290 >SDL_Event</SPAN | |
291 ></A | |
292 >, | |
293 <A | |
294 HREF="sdlmousebuttonevent.html" | |
295 ><SPAN | |
296 CLASS="STRUCTNAME" | |
297 >SDL_MouseButtonEvent</SPAN | |
298 ></A | |
299 ></P | |
300 ></DIV | |
301 ><DIV | |
302 CLASS="NAVFOOTER" | |
303 ><HR | |
304 ALIGN="LEFT" | |
305 WIDTH="100%"><TABLE | |
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306 SUMMARY="Footer navigation table" |
0 | 307 WIDTH="100%" |
308 BORDER="0" | |
309 CELLPADDING="0" | |
310 CELLSPACING="0" | |
311 ><TR | |
312 ><TD | |
313 WIDTH="33%" | |
314 ALIGN="left" | |
315 VALIGN="top" | |
316 ><A | |
317 HREF="sdlkeyboardevent.html" | |
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318 ACCESSKEY="P" |
0 | 319 >Prev</A |
320 ></TD | |
321 ><TD | |
322 WIDTH="34%" | |
323 ALIGN="center" | |
324 VALIGN="top" | |
325 ><A | |
326 HREF="index.html" | |
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327 ACCESSKEY="H" |
0 | 328 >Home</A |
329 ></TD | |
330 ><TD | |
331 WIDTH="33%" | |
332 ALIGN="right" | |
333 VALIGN="top" | |
334 ><A | |
335 HREF="sdlmousebuttonevent.html" | |
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336 ACCESSKEY="N" |
0 | 337 >Next</A |
338 ></TD | |
339 ></TR | |
340 ><TR | |
341 ><TD | |
342 WIDTH="33%" | |
343 ALIGN="left" | |
344 VALIGN="top" | |
345 >SDL_KeyboardEvent</TD | |
346 ><TD | |
347 WIDTH="34%" | |
348 ALIGN="center" | |
349 VALIGN="top" | |
350 ><A | |
351 HREF="eventstructures.html" | |
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352 ACCESSKEY="U" |
0 | 353 >Up</A |
354 ></TD | |
355 ><TD | |
356 WIDTH="33%" | |
357 ALIGN="right" | |
358 VALIGN="top" | |
359 >SDL_MouseButtonEvent</TD | |
360 ></TR | |
361 ></TABLE | |
362 ></DIV | |
363 ></BODY | |
364 ></HTML | |
365 > |