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annotate docs/html/sdlbuildaudiocvt.html @ 3100:7dc982143c06
Date: Sun, 22 Mar 2009 12:52:29 +0000
From: Luke Benstead
Subject: OpenGL 3.0 Context Creation
I've attached a patch which implements OpenGL 3.x context creation on
the latest SVN. I've added two options to SDL_GL_SetAttribute, these
are SDL_GL_CONTEXT_MAJOR_VERSION and SDL_GL_CONTEXT_MINOR_VERSION.
These default to 2 and 1 respectively. If the major version is less
than 3 then the current context creation method is used, otherwise the
appropriate new context creation function is called (depending on the
platform).
Sample code:
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Unable to initialize SDL: %s\n", SDL_GetError());
return 1;
}
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3); //Without these 2 lines, SDL will create a GL 2.x context
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_Surface* screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL | SDL_FULLSCREEN );
I've implemented context creation on both Win32 and X and run basic
tests on both. This patch doesn't provide access to all the options
allowed by the new context creation (e.g. shared contexts, forward
compatible contexts) but they can be added pretty easily.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 24 Mar 2009 10:43:53 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_BuildAudioCVT</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="Audio" | |
14 HREF="audio.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_AudioCVT" | |
17 HREF="sdlaudiocvt.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_ConvertAudio" | |
20 HREF="sdlconvertaudio.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="sdlaudiocvt.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="sdlconvertaudio.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="SDLBUILDAUDIOCVT" | |
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74 ></A |
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75 >SDL_BuildAudioCVT</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN7002" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_BuildAudioCVT -- Initializes a SDL_AudioCVT structure for conversion</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN7005" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN7006" |
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_BuildAudioCVT</B | |
108 ></CODE | |
109 >(SDL_AudioCVT *cvt, Uint16 src_format, Uint8 src_channels, int src_rate, Uint16 dst_format, Uint8 dst_channels, int dst_rate);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN7012" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Before an <A | |
124 HREF="sdlaudiocvt.html" | |
125 ><SPAN | |
126 CLASS="STRUCTNAME" | |
127 >SDL_AudioCVT</SPAN | |
128 ></A | |
129 > structure can be used to convert audio data it must be initialized with source and destination information. </P | |
130 ><P | |
131 ><TT | |
132 CLASS="PARAMETER" | |
133 ><I | |
134 >src_format</I | |
135 ></TT | |
136 > and <TT | |
137 CLASS="PARAMETER" | |
138 ><I | |
139 >dst_format</I | |
140 ></TT | |
141 > are the source and destination format of the conversion. (For information on audio formats see <A | |
142 HREF="sdlaudiospec.html" | |
143 ><SPAN | |
144 CLASS="STRUCTNAME" | |
145 > SDL_AudioSpec</SPAN | |
146 ></A | |
147 >). <TT | |
148 CLASS="PARAMETER" | |
149 ><I | |
150 >src_channels</I | |
151 ></TT | |
152 > and <TT | |
153 CLASS="PARAMETER" | |
154 ><I | |
155 >dst_channels</I | |
156 ></TT | |
157 > are the number of channels in the source and destination formats. Finally, <TT | |
158 CLASS="PARAMETER" | |
159 ><I | |
160 >src_rate</I | |
161 ></TT | |
162 > and <TT | |
163 CLASS="PARAMETER" | |
164 ><I | |
165 >dst_rate</I | |
166 ></TT | |
167 > are the frequency or samples-per-second of the source and destination formats. Once again, see <A | |
168 HREF="sdlaudiospec.html" | |
169 ><SPAN | |
170 CLASS="STRUCTNAME" | |
171 >SDL_AudioSpec</SPAN | |
172 ></A | |
173 >.</P | |
174 ></DIV | |
175 ><DIV | |
176 CLASS="REFSECT1" | |
177 ><A | |
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178 NAME="AEN7028" |
0 | 179 ></A |
180 ><H2 | |
181 >Return Values</H2 | |
182 ><P | |
183 >Returns <SPAN | |
184 CLASS="RETURNVALUE" | |
185 >-1</SPAN | |
186 > if the filter could not be built or 1 if it could.</P | |
187 ></DIV | |
188 ><DIV | |
189 CLASS="REFSECT1" | |
190 ><A | |
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191 NAME="AEN7032" |
0 | 192 ></A |
193 ><H2 | |
194 >Examples</H2 | |
195 ><P | |
196 >See <A | |
197 HREF="sdlconvertaudio.html" | |
198 ><TT | |
199 CLASS="FUNCTION" | |
200 >SDL_ConvertAudio</TT | |
201 ></A | |
202 >.</P | |
203 ></DIV | |
204 ><DIV | |
205 CLASS="REFSECT1" | |
206 ><A | |
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207 NAME="AEN7037" |
0 | 208 ></A |
209 ><H2 | |
210 >See Also</H2 | |
211 ><P | |
212 ><A | |
213 HREF="sdlconvertaudio.html" | |
214 ><TT | |
215 CLASS="FUNCTION" | |
216 >SDL_ConvertAudio</TT | |
217 ></A | |
218 >, | |
219 <A | |
220 HREF="sdlaudiocvt.html" | |
221 ><TT | |
222 CLASS="FUNCTION" | |
223 >SDL_AudioCVT</TT | |
224 ></A | |
225 ></P | |
226 ></DIV | |
227 ><DIV | |
228 CLASS="NAVFOOTER" | |
229 ><HR | |
230 ALIGN="LEFT" | |
231 WIDTH="100%"><TABLE | |
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232 SUMMARY="Footer navigation table" |
0 | 233 WIDTH="100%" |
234 BORDER="0" | |
235 CELLPADDING="0" | |
236 CELLSPACING="0" | |
237 ><TR | |
238 ><TD | |
239 WIDTH="33%" | |
240 ALIGN="left" | |
241 VALIGN="top" | |
242 ><A | |
243 HREF="sdlaudiocvt.html" | |
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244 ACCESSKEY="P" |
0 | 245 >Prev</A |
246 ></TD | |
247 ><TD | |
248 WIDTH="34%" | |
249 ALIGN="center" | |
250 VALIGN="top" | |
251 ><A | |
252 HREF="index.html" | |
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253 ACCESSKEY="H" |
0 | 254 >Home</A |
255 ></TD | |
256 ><TD | |
257 WIDTH="33%" | |
258 ALIGN="right" | |
259 VALIGN="top" | |
260 ><A | |
261 HREF="sdlconvertaudio.html" | |
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262 ACCESSKEY="N" |
0 | 263 >Next</A |
264 ></TD | |
265 ></TR | |
266 ><TR | |
267 ><TD | |
268 WIDTH="33%" | |
269 ALIGN="left" | |
270 VALIGN="top" | |
271 >SDL_AudioCVT</TD | |
272 ><TD | |
273 WIDTH="34%" | |
274 ALIGN="center" | |
275 VALIGN="top" | |
276 ><A | |
277 HREF="audio.html" | |
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278 ACCESSKEY="U" |
0 | 279 >Up</A |
280 ></TD | |
281 ><TD | |
282 WIDTH="33%" | |
283 ALIGN="right" | |
284 VALIGN="top" | |
285 >SDL_ConvertAudio</TD | |
286 ></TR | |
287 ></TABLE | |
288 ></DIV | |
289 ></BODY | |
290 ></HTML | |
291 > |