Mercurial > sdl-ios-xcode
annotate docs/html/sdlsetcolorkey.html @ 914:bbf8dcc8aed6
Date: Wed, 23 Jun 2004 17:05:33 -0400
From: Chris Nelson
Subject: [SDL] [Patch] WiseGroup MP-8800 / MP-8866 (PS2 Joystick)
In the current cvs version, SDL doesn't handle these Playstation2
controller => USB adapters correctly, in linux.
It will always assume that the maximum number of joysticks (2 in the
case of the MP-8866, 4 in the case of the 8800) are plugged in. This is
bad not only because it allows SDL to exaggerate the number of logical
joysticks, but primarily because the joystick axes are mapped
incorrectly, all over the place, such that the devices are effectively
unusable unless you have the maximum number of joysticks plugged in.
My changes to src/joystick/linux/SDL_sysjoystick.c build on another's
previous work (which was a special case for this very joystick,
actually), and fix both of these problems, as well as making the current
code a little more general, to allow for others to more easily drop in
code for quirky joysticks such as these.
I've tested this code under 2.6.7 as well as 2.4.24... Both work as
advertised (provided you load the JOYDEV linux code as a module,
otherwise they won't work at all, new code or old, but that's another
issue entirely).
Though this sounds horribly formal, you have my permission to distribute
all of my work on this issue under the LGPL. So there.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 25 Jul 2004 18:31:50 +0000 |
parents | 355632dca928 |
children |
rev | line source |
---|---|
0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_SetColorKey</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="Video" | |
14 HREF="video.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_SaveBMP" | |
17 HREF="sdlsavebmp.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_SetAlpha" | |
20 HREF="sdlsetalpha.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="sdlsavebmp.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="sdlsetalpha.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="SDLSETCOLORKEY" | |
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_SetColorKey</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="AEN2045" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_SetColorKey -- Sets the color key (transparent pixel) in a blittable surface and | |
84 RLE acceleration.</DIV | |
85 ><DIV | |
86 CLASS="REFSYNOPSISDIV" | |
87 ><A | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
88 NAME="AEN2048" |
0 | 89 ></A |
90 ><H2 | |
91 >Synopsis</H2 | |
92 ><DIV | |
93 CLASS="FUNCSYNOPSIS" | |
94 ><A | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
95 NAME="AEN2049" |
0 | 96 ></A |
97 ><P | |
98 ></P | |
99 ><PRE | |
100 CLASS="FUNCSYNOPSISINFO" | |
101 >#include "SDL.h"</PRE | |
102 ><P | |
103 ><CODE | |
104 ><CODE | |
105 CLASS="FUNCDEF" | |
106 >int <B | |
107 CLASS="FSFUNC" | |
108 >SDL_SetColorKey</B | |
109 ></CODE | |
110 >(SDL_Surface *surface, Uint32 flag, Uint32 key);</CODE | |
111 ></P | |
112 ><P | |
113 ></P | |
114 ></DIV | |
115 ></DIV | |
116 ><DIV | |
117 CLASS="REFSECT1" | |
118 ><A | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
119 NAME="AEN2055" |
0 | 120 ></A |
121 ><H2 | |
122 >Description</H2 | |
123 ><P | |
124 > Sets the color key (transparent pixel) in a blittable surface and enables or | |
125 disables RLE blit acceleration.</P | |
126 ><P | |
127 >RLE acceleration can substantially speed up blitting of images with large | |
128 horizontal runs of transparent pixels (i.e., pixels that match the | |
129 <TT | |
130 CLASS="PARAMETER" | |
131 ><I | |
132 >key</I | |
133 ></TT | |
134 > value). The <TT | |
135 CLASS="PARAMETER" | |
136 ><I | |
137 >key</I | |
138 ></TT | |
139 > must be of the same pixel format as the <TT | |
140 CLASS="PARAMETER" | |
141 ><I | |
142 >surface</I | |
143 ></TT | |
144 >, <A | |
145 HREF="sdlmaprgb.html" | |
146 ><TT | |
147 CLASS="FUNCTION" | |
148 >SDL_MapRGB</TT | |
149 ></A | |
150 > is often useful for obtaining an acceptable value.</P | |
151 ><P | |
152 >If <TT | |
153 CLASS="PARAMETER" | |
154 ><I | |
155 >flag</I | |
156 ></TT | |
157 > is <TT | |
158 CLASS="LITERAL" | |
159 >SDL_SRCCOLORKEY</TT | |
160 > then | |
161 <TT | |
162 CLASS="PARAMETER" | |
163 ><I | |
164 >key</I | |
165 ></TT | |
166 > is the transparent pixel value in the source image of a | |
167 blit.</P | |
168 ><P | |
169 >If <TT | |
170 CLASS="PARAMETER" | |
171 ><I | |
172 >flag</I | |
173 ></TT | |
174 > is OR'd with | |
175 <TT | |
176 CLASS="LITERAL" | |
177 >SDL_RLEACCEL</TT | |
178 > then the surface will be draw using RLE | |
179 acceleration when drawn with | |
180 <A | |
181 HREF="sdlblitsurface.html" | |
182 >SDL_BlitSurface</A | |
183 >. The surface will | |
184 actually be encoded for RLE acceleration the first time | |
185 <A | |
186 HREF="sdlblitsurface.html" | |
187 >SDL_BlitSurface</A | |
188 > or | |
189 <A | |
190 HREF="sdldisplayformat.html" | |
191 >SDL_DisplayFormat</A | |
192 > is called on the | |
193 surface.</P | |
194 ><P | |
195 >If <TT | |
196 CLASS="PARAMETER" | |
197 ><I | |
198 >flag</I | |
199 ></TT | |
200 > is 0, this function clears | |
201 any current color key.</P | |
202 ></DIV | |
203 ><DIV | |
204 CLASS="REFSECT1" | |
205 ><A | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
206 NAME="AEN2076" |
0 | 207 ></A |
208 ><H2 | |
209 >Return Value</H2 | |
210 ><P | |
211 >This function returns <SPAN | |
212 CLASS="RETURNVALUE" | |
213 >0</SPAN | |
214 >, or | |
215 <SPAN | |
216 CLASS="RETURNVALUE" | |
217 >-1</SPAN | |
218 > if there was an error.</P | |
219 ></DIV | |
220 ><DIV | |
221 CLASS="REFSECT1" | |
222 ><A | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
223 NAME="AEN2081" |
0 | 224 ></A |
225 ><H2 | |
226 >See Also</H2 | |
227 ><P | |
228 ><A | |
229 HREF="sdlblitsurface.html" | |
230 ><TT | |
231 CLASS="FUNCTION" | |
232 >SDL_BlitSurface</TT | |
233 ></A | |
234 >, | |
235 <A | |
236 HREF="sdldisplayformat.html" | |
237 ><TT | |
238 CLASS="FUNCTION" | |
239 >SDL_DisplayFormat</TT | |
240 ></A | |
241 >, | |
242 <A | |
243 HREF="sdlmaprgb.html" | |
244 ><TT | |
245 CLASS="FUNCTION" | |
246 >SDL_MapRGB</TT | |
247 ></A | |
248 >, | |
249 <A | |
250 HREF="sdlsetalpha.html" | |
251 ><TT | |
252 CLASS="FUNCTION" | |
253 >SDL_SetAlpha</TT | |
254 ></A | |
255 ></P | |
256 ></DIV | |
257 ><DIV | |
258 CLASS="NAVFOOTER" | |
259 ><HR | |
260 ALIGN="LEFT" | |
261 WIDTH="100%"><TABLE | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
262 SUMMARY="Footer navigation table" |
0 | 263 WIDTH="100%" |
264 BORDER="0" | |
265 CELLPADDING="0" | |
266 CELLSPACING="0" | |
267 ><TR | |
268 ><TD | |
269 WIDTH="33%" | |
270 ALIGN="left" | |
271 VALIGN="top" | |
272 ><A | |
273 HREF="sdlsavebmp.html" | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
274 ACCESSKEY="P" |
0 | 275 >Prev</A |
276 ></TD | |
277 ><TD | |
278 WIDTH="34%" | |
279 ALIGN="center" | |
280 VALIGN="top" | |
281 ><A | |
282 HREF="index.html" | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
283 ACCESSKEY="H" |
0 | 284 >Home</A |
285 ></TD | |
286 ><TD | |
287 WIDTH="33%" | |
288 ALIGN="right" | |
289 VALIGN="top" | |
290 ><A | |
291 HREF="sdlsetalpha.html" | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
292 ACCESSKEY="N" |
0 | 293 >Next</A |
294 ></TD | |
295 ></TR | |
296 ><TR | |
297 ><TD | |
298 WIDTH="33%" | |
299 ALIGN="left" | |
300 VALIGN="top" | |
301 >SDL_SaveBMP</TD | |
302 ><TD | |
303 WIDTH="34%" | |
304 ALIGN="center" | |
305 VALIGN="top" | |
306 ><A | |
307 HREF="video.html" | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
308 ACCESSKEY="U" |
0 | 309 >Up</A |
310 ></TD | |
311 ><TD | |
312 WIDTH="33%" | |
313 ALIGN="right" | |
314 VALIGN="top" | |
315 >SDL_SetAlpha</TD | |
316 ></TR | |
317 ></TABLE | |
318 ></DIV | |
319 ></BODY | |
320 ></HTML | |
321 > |