Mercurial > sdl-ios-xcode
annotate docs/html/guideaudioexamples.html @ 664:abfdc08eb289
Date: Sun, 3 Aug 2003 22:07:57 +0200
From: Max Horn
Subject: SDL OSX fullscreen FIX
the attached patch fixes the fullscreen problems on SDL/OSX. The cause
was that click events are bounded by winRect. Now, winRect is set to
the size of the video surface. But if you e.g. request a 640x420
surface, you might get a 640x480 "real" surface. Still,
SDL_VideoSurface->h will be set to 420! Thus, the upper 60 pixels in my
example received no mouse down events.
My fix simply disables this clipping when in full screen mode - after
all, all clicks then should be inside the screen surface. Higher SDL
functions ensure that the coordinates then are clipped to 640x420. It
works fine in all my tests here. I don't know if it's the right thing
to do in multi screen scenarios, though.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 04 Aug 2003 01:00:30 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Audio Examples</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.64 |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="Examples" | |
| 14 HREF="guideexamples.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="Event Examples" | |
| 17 HREF="guideeventexamples.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="CDROM Examples" | |
| 20 HREF="guidecdromexamples.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="SECT1" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
| 31 WIDTH="100%" | |
| 32 BORDER="0" | |
| 33 CELLPADDING="0" | |
| 34 CELLSPACING="0" | |
| 35 ><TR | |
| 36 ><TH | |
| 37 COLSPAN="3" | |
| 38 ALIGN="center" | |
| 39 >SDL Library Documentation</TH | |
| 40 ></TR | |
| 41 ><TR | |
| 42 ><TD | |
| 43 WIDTH="10%" | |
| 44 ALIGN="left" | |
| 45 VALIGN="bottom" | |
| 46 ><A | |
| 47 HREF="guideeventexamples.html" | |
| 48 >Prev</A | |
| 49 ></TD | |
| 50 ><TD | |
| 51 WIDTH="80%" | |
| 52 ALIGN="center" | |
| 53 VALIGN="bottom" | |
| 54 >Chapter 4. Examples</TD | |
| 55 ><TD | |
| 56 WIDTH="10%" | |
| 57 ALIGN="right" | |
| 58 VALIGN="bottom" | |
| 59 ><A | |
| 60 HREF="guidecdromexamples.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><DIV | |
| 69 CLASS="SECT1" | |
| 70 ><H1 | |
| 71 CLASS="SECT1" | |
| 72 ><A | |
| 73 NAME="GUIDEAUDIOEXAMPLES" | |
| 74 >Audio Examples</A | |
| 75 ></H1 | |
| 76 ><P | |
| 77 ></P | |
| 78 ><DIV | |
| 79 CLASS="SECT2" | |
| 80 ><H2 | |
| 81 CLASS="SECT2" | |
| 82 ><A | |
|
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83 NAME="AEN382" |
| 0 | 84 >Opening the audio device</A |
| 85 ></H2 | |
| 86 ><P | |
| 87 ><PRE | |
| 88 CLASS="PROGRAMLISTING" | |
| 89 > SDL_AudioSpec wanted; | |
| 90 extern void fill_audio(void *udata, Uint8 *stream, int len); | |
| 91 | |
| 92 /* Set the audio format */ | |
| 93 wanted.freq = 22050; | |
| 94 wanted.format = AUDIO_S16; | |
| 95 wanted.channels = 2; /* 1 = mono, 2 = stereo */ | |
| 96 wanted.samples = 1024; /* Good low-latency value for callback */ | |
| 97 wanted.callback = fill_audio; | |
| 98 wanted.userdata = NULL; | |
| 99 | |
| 100 /* Open the audio device, forcing the desired format */ | |
| 101 if ( SDL_OpenAudio(&wanted, NULL) < 0 ) { | |
| 102 fprintf(stderr, "Couldn't open audio: %s\n", SDL_GetError()); | |
| 103 return(-1); | |
| 104 } | |
| 105 return(0);</PRE | |
| 106 ></P | |
| 107 ></DIV | |
| 108 ><DIV | |
| 109 CLASS="SECT2" | |
| 110 ><H2 | |
| 111 CLASS="SECT2" | |
| 112 ><A | |
|
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113 NAME="AEN386" |
| 0 | 114 >Playing audio</A |
| 115 ></H2 | |
| 116 ><P | |
| 117 ><PRE | |
| 118 CLASS="PROGRAMLISTING" | |
| 119 > static Uint8 *audio_chunk; | |
| 120 static Uint32 audio_len; | |
| 121 static Uint8 *audio_pos; | |
| 122 | |
| 123 /* The audio function callback takes the following parameters: | |
| 124 stream: A pointer to the audio buffer to be filled | |
| 125 len: The length (in bytes) of the audio buffer | |
| 126 */ | |
| 127 void fill_audio(void *udata, Uint8 *stream, int len) | |
| 128 { | |
| 129 /* Only play if we have data left */ | |
| 130 if ( audio_len == 0 ) | |
| 131 return; | |
| 132 | |
| 133 /* Mix as much data as possible */ | |
| 134 len = ( len > audio_len ? audio_len : len ); | |
|
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135 SDL_MixAudio(stream, audio_pos, len, SDL_MIX_MAXVOLUME); |
| 0 | 136 audio_pos += len; |
| 137 audio_len -= len; | |
| 138 } | |
| 139 | |
| 140 /* Load the audio data ... */ | |
| 141 | |
| 142 ;;;;; | |
| 143 | |
| 144 audio_pos = audio_chunk; | |
| 145 | |
| 146 /* Let the callback function play the audio chunk */ | |
| 147 SDL_PauseAudio(0); | |
| 148 | |
| 149 /* Do some processing */ | |
| 150 | |
| 151 ;;;;; | |
| 152 | |
| 153 /* Wait for sound to complete */ | |
| 154 while ( audio_len > 0 ) { | |
| 155 SDL_Delay(100); /* Sleep 1/10 second */ | |
| 156 } | |
| 157 SDL_CloseAudio();</PRE | |
| 158 ></P | |
| 159 ></DIV | |
| 160 ></DIV | |
| 161 ><DIV | |
| 162 CLASS="NAVFOOTER" | |
| 163 ><HR | |
| 164 ALIGN="LEFT" | |
| 165 WIDTH="100%"><TABLE | |
| 166 WIDTH="100%" | |
| 167 BORDER="0" | |
| 168 CELLPADDING="0" | |
| 169 CELLSPACING="0" | |
| 170 ><TR | |
| 171 ><TD | |
| 172 WIDTH="33%" | |
| 173 ALIGN="left" | |
| 174 VALIGN="top" | |
| 175 ><A | |
| 176 HREF="guideeventexamples.html" | |
| 177 >Prev</A | |
| 178 ></TD | |
| 179 ><TD | |
| 180 WIDTH="34%" | |
| 181 ALIGN="center" | |
| 182 VALIGN="top" | |
| 183 ><A | |
| 184 HREF="index.html" | |
| 185 >Home</A | |
| 186 ></TD | |
| 187 ><TD | |
| 188 WIDTH="33%" | |
| 189 ALIGN="right" | |
| 190 VALIGN="top" | |
| 191 ><A | |
| 192 HREF="guidecdromexamples.html" | |
| 193 >Next</A | |
| 194 ></TD | |
| 195 ></TR | |
| 196 ><TR | |
| 197 ><TD | |
| 198 WIDTH="33%" | |
| 199 ALIGN="left" | |
| 200 VALIGN="top" | |
| 201 >Event Examples</TD | |
| 202 ><TD | |
| 203 WIDTH="34%" | |
| 204 ALIGN="center" | |
| 205 VALIGN="top" | |
| 206 ><A | |
| 207 HREF="guideexamples.html" | |
| 208 >Up</A | |
| 209 ></TD | |
| 210 ><TD | |
| 211 WIDTH="33%" | |
| 212 ALIGN="right" | |
| 213 VALIGN="top" | |
| 214 >CDROM Examples</TD | |
| 215 ></TR | |
| 216 ></TABLE | |
| 217 ></DIV | |
| 218 ></BODY | |
| 219 ></HTML | |
| 220 > |