Mercurial > sdl-ios-xcode
annotate docs/html/sdlcd.html @ 641:df178851293b
Date: 28 Jun 2003 22:42:52 +0100
From: Alan Swanson
Subject: Re: [SDL] New XFree 4.3 Video Mode Patch
I have a wee amendment that moves the qsort in set_best_resolution
to only occur after failing to find an exact match only. This would
make absolutely sure we get a user set mode.
While I've never had any problems for my normal resolutions (1280x1024,
1024x768, 800x600 & 640,480) while closely examining the output from
qsort I've noticed it doesn't seem to sort the modes fully. These is
one definite wrong at 1152x768 and a few that just look wrong to me.
From a program (attached) I made to examine this more easily. X has
sorted its mode list using the same method as ours (plus frequency),
and our user modes get inserted without any other movement.
On the patch I've made I've also changed cmpmodes to sort on vertical
resolution and then horizontal. Ie vertical is now most significant
bit.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 28 Jun 2003 21:52:26 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_CD</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="CD-ROM" | |
| 14 HREF="cdrom.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_CDClose" | |
| 17 HREF="sdlcdclose.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CDtrack" | |
| 20 HREF="sdlcdtrack.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 | |
| 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="sdlcdclose.html" | |
| 48 >Prev</A | |
| 49 ></TD | |
| 50 ><TD | |
| 51 WIDTH="80%" | |
| 52 ALIGN="center" | |
| 53 VALIGN="bottom" | |
| 54 ></TD | |
| 55 ><TD | |
| 56 WIDTH="10%" | |
| 57 ALIGN="right" | |
| 58 VALIGN="bottom" | |
| 59 ><A | |
| 60 HREF="sdlcdtrack.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><H1 | |
| 69 ><A | |
| 70 NAME="SDLCD" | |
| 71 >SDL_CD</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN7178" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_CD -- CDROM Drive Information</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSECT1" | |
| 83 ><A | |
|
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84 NAME="AEN7181" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Structure Definition</H2 | |
| 88 ><PRE | |
| 89 CLASS="PROGRAMLISTING" | |
| 90 >typedef struct{ | |
| 91 int id; | |
| 92 CDstatus status; | |
| 93 int numtracks; | |
| 94 int cur_track; | |
| 95 int cur_frame; | |
| 96 SDL_CDtrack track[SDL_MAX_TRACKS+1]; | |
| 97 } SDL_CD;</PRE | |
| 98 ></DIV | |
| 99 ><DIV | |
| 100 CLASS="REFSECT1" | |
| 101 ><A | |
|
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102 NAME="AEN7184" |
| 0 | 103 ></A |
| 104 ><H2 | |
| 105 >Structure Data</H2 | |
| 106 ><DIV | |
| 107 CLASS="INFORMALTABLE" | |
| 108 ><A | |
|
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109 NAME="AEN7186" |
| 0 | 110 ></A |
| 111 ><P | |
| 112 ></P | |
| 113 ><TABLE | |
| 114 BORDER="0" | |
| 115 CLASS="CALSTABLE" | |
| 116 ><TBODY | |
| 117 ><TR | |
| 118 ><TD | |
| 119 ALIGN="LEFT" | |
| 120 VALIGN="TOP" | |
| 121 ><TT | |
| 122 CLASS="STRUCTFIELD" | |
| 123 ><I | |
| 124 >id</I | |
| 125 ></TT | |
| 126 ></TD | |
| 127 ><TD | |
| 128 ALIGN="LEFT" | |
| 129 VALIGN="TOP" | |
| 130 >Private drive identifier</TD | |
| 131 ></TR | |
| 132 ><TR | |
| 133 ><TD | |
| 134 ALIGN="LEFT" | |
| 135 VALIGN="TOP" | |
| 136 ><TT | |
| 137 CLASS="STRUCTFIELD" | |
| 138 ><I | |
| 139 >status</I | |
| 140 ></TT | |
| 141 ></TD | |
| 142 ><TD | |
| 143 ALIGN="LEFT" | |
| 144 VALIGN="TOP" | |
| 145 >Drive <A | |
| 146 HREF="sdlcdstatus.html" | |
| 147 >status</A | |
| 148 ></TD | |
| 149 ></TR | |
| 150 ><TR | |
| 151 ><TD | |
| 152 ALIGN="LEFT" | |
| 153 VALIGN="TOP" | |
| 154 ><TT | |
| 155 CLASS="STRUCTFIELD" | |
| 156 ><I | |
| 157 >numtracks</I | |
| 158 ></TT | |
| 159 ></TD | |
| 160 ><TD | |
| 161 ALIGN="LEFT" | |
| 162 VALIGN="TOP" | |
| 163 >Number of tracks on the CD</TD | |
| 164 ></TR | |
| 165 ><TR | |
| 166 ><TD | |
| 167 ALIGN="LEFT" | |
| 168 VALIGN="TOP" | |
| 169 ><TT | |
| 170 CLASS="STRUCTFIELD" | |
| 171 ><I | |
| 172 >cur_track</I | |
| 173 ></TT | |
| 174 ></TD | |
| 175 ><TD | |
| 176 ALIGN="LEFT" | |
| 177 VALIGN="TOP" | |
| 178 >Current track</TD | |
| 179 ></TR | |
| 180 ><TR | |
| 181 ><TD | |
| 182 ALIGN="LEFT" | |
| 183 VALIGN="TOP" | |
| 184 ><TT | |
| 185 CLASS="STRUCTFIELD" | |
| 186 ><I | |
| 187 >cur_frame</I | |
| 188 ></TT | |
| 189 ></TD | |
| 190 ><TD | |
| 191 ALIGN="LEFT" | |
| 192 VALIGN="TOP" | |
| 193 >Current frame offset within the track</TD | |
| 194 ></TR | |
| 195 ><TR | |
| 196 ><TD | |
| 197 ALIGN="LEFT" | |
| 198 VALIGN="TOP" | |
| 199 ><TT | |
| 200 CLASS="STRUCTFIELD" | |
| 201 ><I | |
| 202 >track</I | |
| 203 ></TT | |
| 204 >[SDL_MAX_TRACKS+1]</TD | |
| 205 ><TD | |
| 206 ALIGN="LEFT" | |
| 207 VALIGN="TOP" | |
| 208 >Array of track descriptions. (see <A | |
| 209 HREF="sdlcdtrack.html" | |
| 210 ><SPAN | |
| 211 CLASS="STRUCTNAME" | |
| 212 >SDL_CDtrack</SPAN | |
| 213 ></A | |
| 214 >)</TD | |
| 215 ></TR | |
| 216 ></TBODY | |
| 217 ></TABLE | |
| 218 ><P | |
| 219 ></P | |
| 220 ></DIV | |
| 221 ></DIV | |
| 222 ><DIV | |
| 223 CLASS="REFSECT1" | |
| 224 ><A | |
|
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225 NAME="AEN7216" |
| 0 | 226 ></A |
| 227 ><H2 | |
| 228 >Description</H2 | |
| 229 ><P | |
| 230 >An <SPAN | |
| 231 CLASS="STRUCTNAME" | |
| 232 >SDL_CD</SPAN | |
| 233 > structure is returned by <A | |
| 234 HREF="sdlcdopen.html" | |
| 235 ><TT | |
| 236 CLASS="FUNCTION" | |
| 237 >SDL_CDOpen</TT | |
| 238 ></A | |
| 239 >. It represents an opened CDROM device and stores information on the layout of the tracks on the disc.</P | |
| 240 ><P | |
| 241 >A frame is the base data unit of a CD. <TT | |
| 242 CLASS="LITERAL" | |
| 243 >CD_FPS</TT | |
| 244 > frames is equal to 1 second of music. SDL provides two macros for converting between time and frames: <TT | |
| 245 CLASS="LITERAL" | |
| 246 >FRAMES_TO_MSF(f, M,S,F)</TT | |
| 247 > and <TT | |
| 248 CLASS="LITERAL" | |
| 249 >MSF_TO_FRAMES</TT | |
| 250 >.</P | |
| 251 ></DIV | |
| 252 ><DIV | |
| 253 CLASS="REFSECT1" | |
| 254 ><A | |
|
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255 NAME="AEN7226" |
| 0 | 256 ></A |
| 257 ><H2 | |
| 258 >Examples</H2 | |
| 259 ><PRE | |
| 260 CLASS="PROGRAMLISTING" | |
| 261 >int min, sec, frame; | |
| 262 int frame_offset; | |
| 263 | |
| 264 FRAMES_TO_MSF(cdrom->cur_frame, &min, &sec, &frame); | |
| 265 printf("Current Position: %d minutes, %d seconds, %d frames\n", min, sec, frame); | |
| 266 | |
| 267 frame_offset=MSF_TO_FRAMES(min, sec, frame);</PRE | |
| 268 ></DIV | |
| 269 ><DIV | |
| 270 CLASS="REFSECT1" | |
| 271 ><A | |
|
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272 NAME="AEN7229" |
| 0 | 273 ></A |
| 274 ><H2 | |
| 275 >See Also</H2 | |
| 276 ><P | |
| 277 ><A | |
| 278 HREF="sdlcdopen.html" | |
| 279 ><TT | |
| 280 CLASS="FUNCTION" | |
| 281 >SDL_CDOpen</TT | |
| 282 ></A | |
| 283 >, | |
| 284 <A | |
| 285 HREF="sdlcdtrack.html" | |
| 286 ><SPAN | |
| 287 CLASS="STRUCTNAME" | |
| 288 >SDL_CDtrack</SPAN | |
| 289 ></A | |
| 290 ></P | |
| 291 ></DIV | |
| 292 ><DIV | |
| 293 CLASS="NAVFOOTER" | |
| 294 ><HR | |
| 295 ALIGN="LEFT" | |
| 296 WIDTH="100%"><TABLE | |
| 297 WIDTH="100%" | |
| 298 BORDER="0" | |
| 299 CELLPADDING="0" | |
| 300 CELLSPACING="0" | |
| 301 ><TR | |
| 302 ><TD | |
| 303 WIDTH="33%" | |
| 304 ALIGN="left" | |
| 305 VALIGN="top" | |
| 306 ><A | |
| 307 HREF="sdlcdclose.html" | |
| 308 >Prev</A | |
| 309 ></TD | |
| 310 ><TD | |
| 311 WIDTH="34%" | |
| 312 ALIGN="center" | |
| 313 VALIGN="top" | |
| 314 ><A | |
| 315 HREF="index.html" | |
| 316 >Home</A | |
| 317 ></TD | |
| 318 ><TD | |
| 319 WIDTH="33%" | |
| 320 ALIGN="right" | |
| 321 VALIGN="top" | |
| 322 ><A | |
| 323 HREF="sdlcdtrack.html" | |
| 324 >Next</A | |
| 325 ></TD | |
| 326 ></TR | |
| 327 ><TR | |
| 328 ><TD | |
| 329 WIDTH="33%" | |
| 330 ALIGN="left" | |
| 331 VALIGN="top" | |
| 332 >SDL_CDClose</TD | |
| 333 ><TD | |
| 334 WIDTH="34%" | |
| 335 ALIGN="center" | |
| 336 VALIGN="top" | |
| 337 ><A | |
| 338 HREF="cdrom.html" | |
| 339 >Up</A | |
| 340 ></TD | |
| 341 ><TD | |
| 342 WIDTH="33%" | |
| 343 ALIGN="right" | |
| 344 VALIGN="top" | |
| 345 >SDL_CDtrack</TD | |
| 346 ></TR | |
| 347 ></TABLE | |
| 348 ></DIV | |
| 349 ></BODY | |
| 350 ></HTML | |
| 351 > |