Mercurial > sdl-ios-xcode
annotate docs/html/sdljoysticknumbuttons.html @ 3335:b8d313de8a65
Adam Strzelecki to SDL
Since current DirectFB implementation is incomplete for YUV surfaces (actually causes segmentation faults when trying Lock and use YUV planar textures) I decided to fix it a bit.
Here's a patch that should make DirectFB properly support YUV both packed and planar (3 planes).
(1) Removed SDL_BYTESPERPIXEL at all in favor of DFB_BYTES_PER_PIXEL(SDLToDFBPixelFormat(fmt)) which does return always proper BPP for YUVs too, coz SDL_BYTESPERPIXEL returns incorrect values for FOURCCs
(2) Fixed data->pixels allocation for planar YUVs in CreateTexture, it should allocate 150% more space
(3) Copy other planes for planar YUVs in UpdateTexture
(4) Moved checking if format is supported at all with DirectFB on CreateTexture at the beginning of the code
Waiting for comments,
--
Adam Strzelecki | nanoant.com
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 04 Oct 2009 04:03:37 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_JoystickNumButtons</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="Joystick" | |
14 HREF="joystick.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_JoystickNumHats" | |
17 HREF="sdljoysticknumhats.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_JoystickUpdate" | |
20 HREF="sdljoystickupdate.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="sdljoysticknumhats.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="sdljoystickupdate.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="SDLJOYSTICKNUMBUTTONS" | |
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74 ></A |
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75 >SDL_JoystickNumButtons</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN6268" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_JoystickNumButtons -- Get the number of joysitck buttons</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN6271" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN6272" |
0 | 95 ></A |
96 ><P | |
97 ></P | |
98 ><PRE | |
99 CLASS="FUNCSYNOPSISINFO" | |
100 >#include "SDL.h"</PRE | |
101 ><P | |
102 ><CODE | |
103 ><CODE | |
104 CLASS="FUNCDEF" | |
105 >int <B | |
106 CLASS="FSFUNC" | |
107 >SDL_JoystickNumButtons</B | |
108 ></CODE | |
109 >(SDL_Joystick *joystick);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN6278" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Return the number of buttons available from a previously opened <SPAN | |
124 CLASS="STRUCTNAME" | |
125 >SDL_Joystick</SPAN | |
126 >.</P | |
127 ></DIV | |
128 ><DIV | |
129 CLASS="REFSECT1" | |
130 ><A | |
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131 NAME="AEN6282" |
0 | 132 ></A |
133 ><H2 | |
134 >Return Value</H2 | |
135 ><P | |
136 >Number of buttons.</P | |
137 ></DIV | |
138 ><DIV | |
139 CLASS="REFSECT1" | |
140 ><A | |
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141 NAME="AEN6285" |
0 | 142 ></A |
143 ><H2 | |
144 >See Also</H2 | |
145 ><P | |
146 ><A | |
147 HREF="sdljoystickgetbutton.html" | |
148 ><TT | |
149 CLASS="FUNCTION" | |
150 >SDL_JoystickGetButton</TT | |
151 ></A | |
152 >, | |
153 <A | |
154 HREF="sdljoystickopen.html" | |
155 ><TT | |
156 CLASS="FUNCTION" | |
157 >SDL_JoystickOpen</TT | |
158 ></A | |
159 ></P | |
160 ></DIV | |
161 ><DIV | |
162 CLASS="NAVFOOTER" | |
163 ><HR | |
164 ALIGN="LEFT" | |
165 WIDTH="100%"><TABLE | |
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166 SUMMARY="Footer navigation table" |
0 | 167 WIDTH="100%" |
168 BORDER="0" | |
169 CELLPADDING="0" | |
170 CELLSPACING="0" | |
171 ><TR | |
172 ><TD | |
173 WIDTH="33%" | |
174 ALIGN="left" | |
175 VALIGN="top" | |
176 ><A | |
177 HREF="sdljoysticknumhats.html" | |
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178 ACCESSKEY="P" |
0 | 179 >Prev</A |
180 ></TD | |
181 ><TD | |
182 WIDTH="34%" | |
183 ALIGN="center" | |
184 VALIGN="top" | |
185 ><A | |
186 HREF="index.html" | |
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187 ACCESSKEY="H" |
0 | 188 >Home</A |
189 ></TD | |
190 ><TD | |
191 WIDTH="33%" | |
192 ALIGN="right" | |
193 VALIGN="top" | |
194 ><A | |
195 HREF="sdljoystickupdate.html" | |
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196 ACCESSKEY="N" |
0 | 197 >Next</A |
198 ></TD | |
199 ></TR | |
200 ><TR | |
201 ><TD | |
202 WIDTH="33%" | |
203 ALIGN="left" | |
204 VALIGN="top" | |
205 >SDL_JoystickNumHats</TD | |
206 ><TD | |
207 WIDTH="34%" | |
208 ALIGN="center" | |
209 VALIGN="top" | |
210 ><A | |
211 HREF="joystick.html" | |
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212 ACCESSKEY="U" |
0 | 213 >Up</A |
214 ></TD | |
215 ><TD | |
216 WIDTH="33%" | |
217 ALIGN="right" | |
218 VALIGN="top" | |
219 >SDL_JoystickUpdate</TD | |
220 ></TR | |
221 ></TABLE | |
222 ></DIV | |
223 ></BODY | |
224 ></HTML | |
225 > |