Mercurial > sdl-ios-xcode
annotate docs/html/sdlcd.html @ 1295:c3e36ac8a94c
Date: Sun, 6 Mar 2005 17:06:20 +0100
From: Per Inge Mathisen
Subject: [SDL] Fullscreen refresh on win32
Windows has a terrible default for fullscreen 3D apps of 60mhz refresh
rate. This can be fixed by the user by going into his driver's
control panel and forcing the refresh rate higher. However, this not a
very user friendly way about it, and in any case SDL contains no code
that could figure out this that condition has afflicted the user.
So the question is, could SDL fix this for the user? It is possible
under Windows to request a higher refresh rate. The danger is of
course that if the user has an old monitor, and you request a too high
refresh rate, the monitor could be damaged. However, I believe there
might be a way around that: Check before switching what refresh rate
the user's desktop runs in, and if our fullscreen dimensions are equal
or less than those of the desktop, use the higher refresh rate of 60
and the desktop rate.
Since most users run their desktops in the same or higher resolution
something sane, this should fix this problem for most users.
Thoughts?
An alternative is to add an SDL_GL_GetAttribute(SDL_GL_REFRESH_RATE)
option so that programs can bitch at their users at their own
convenience.
- Per
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 30 Jan 2006 06:56:10 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
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| 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 1.76b+ |
| 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 | |
|
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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="sdlcdclose.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="sdlcdtrack.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="SDLCD" | |
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74 ></A |
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75 >SDL_CD</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN7566" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_CD -- CDROM Drive Information</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN7569" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 int id; | |
| 95 CDstatus status; | |
| 96 int numtracks; | |
| 97 int cur_track; | |
| 98 int cur_frame; | |
| 99 SDL_CDtrack track[SDL_MAX_TRACKS+1]; | |
| 100 } SDL_CD;</PRE | |
| 101 ></DIV | |
| 102 ><DIV | |
| 103 CLASS="REFSECT1" | |
| 104 ><A | |
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105 NAME="AEN7572" |
| 0 | 106 ></A |
| 107 ><H2 | |
| 108 >Structure Data</H2 | |
| 109 ><DIV | |
| 110 CLASS="INFORMALTABLE" | |
| 111 ><A | |
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112 NAME="AEN7574" |
| 0 | 113 ></A |
| 114 ><P | |
| 115 ></P | |
| 116 ><TABLE | |
| 117 BORDER="0" | |
| 118 CLASS="CALSTABLE" | |
| 119 ><TBODY | |
| 120 ><TR | |
| 121 ><TD | |
| 122 ALIGN="LEFT" | |
| 123 VALIGN="TOP" | |
| 124 ><TT | |
| 125 CLASS="STRUCTFIELD" | |
| 126 ><I | |
| 127 >id</I | |
| 128 ></TT | |
| 129 ></TD | |
| 130 ><TD | |
| 131 ALIGN="LEFT" | |
| 132 VALIGN="TOP" | |
| 133 >Private drive identifier</TD | |
| 134 ></TR | |
| 135 ><TR | |
| 136 ><TD | |
| 137 ALIGN="LEFT" | |
| 138 VALIGN="TOP" | |
| 139 ><TT | |
| 140 CLASS="STRUCTFIELD" | |
| 141 ><I | |
| 142 >status</I | |
| 143 ></TT | |
| 144 ></TD | |
| 145 ><TD | |
| 146 ALIGN="LEFT" | |
| 147 VALIGN="TOP" | |
| 148 >Drive <A | |
| 149 HREF="sdlcdstatus.html" | |
| 150 >status</A | |
| 151 ></TD | |
| 152 ></TR | |
| 153 ><TR | |
| 154 ><TD | |
| 155 ALIGN="LEFT" | |
| 156 VALIGN="TOP" | |
| 157 ><TT | |
| 158 CLASS="STRUCTFIELD" | |
| 159 ><I | |
| 160 >numtracks</I | |
| 161 ></TT | |
| 162 ></TD | |
| 163 ><TD | |
| 164 ALIGN="LEFT" | |
| 165 VALIGN="TOP" | |
| 166 >Number of tracks on the CD</TD | |
| 167 ></TR | |
| 168 ><TR | |
| 169 ><TD | |
| 170 ALIGN="LEFT" | |
| 171 VALIGN="TOP" | |
| 172 ><TT | |
| 173 CLASS="STRUCTFIELD" | |
| 174 ><I | |
| 175 >cur_track</I | |
| 176 ></TT | |
| 177 ></TD | |
| 178 ><TD | |
| 179 ALIGN="LEFT" | |
| 180 VALIGN="TOP" | |
| 181 >Current track</TD | |
| 182 ></TR | |
| 183 ><TR | |
| 184 ><TD | |
| 185 ALIGN="LEFT" | |
| 186 VALIGN="TOP" | |
| 187 ><TT | |
| 188 CLASS="STRUCTFIELD" | |
| 189 ><I | |
| 190 >cur_frame</I | |
| 191 ></TT | |
| 192 ></TD | |
| 193 ><TD | |
| 194 ALIGN="LEFT" | |
| 195 VALIGN="TOP" | |
| 196 >Current frame offset within the track</TD | |
| 197 ></TR | |
| 198 ><TR | |
| 199 ><TD | |
| 200 ALIGN="LEFT" | |
| 201 VALIGN="TOP" | |
| 202 ><TT | |
| 203 CLASS="STRUCTFIELD" | |
| 204 ><I | |
| 205 >track</I | |
| 206 ></TT | |
| 207 >[SDL_MAX_TRACKS+1]</TD | |
| 208 ><TD | |
| 209 ALIGN="LEFT" | |
| 210 VALIGN="TOP" | |
| 211 >Array of track descriptions. (see <A | |
| 212 HREF="sdlcdtrack.html" | |
| 213 ><SPAN | |
| 214 CLASS="STRUCTNAME" | |
| 215 >SDL_CDtrack</SPAN | |
| 216 ></A | |
| 217 >)</TD | |
| 218 ></TR | |
| 219 ></TBODY | |
| 220 ></TABLE | |
| 221 ><P | |
| 222 ></P | |
| 223 ></DIV | |
| 224 ></DIV | |
| 225 ><DIV | |
| 226 CLASS="REFSECT1" | |
| 227 ><A | |
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228 NAME="AEN7604" |
| 0 | 229 ></A |
| 230 ><H2 | |
| 231 >Description</H2 | |
| 232 ><P | |
| 233 >An <SPAN | |
| 234 CLASS="STRUCTNAME" | |
| 235 >SDL_CD</SPAN | |
| 236 > structure is returned by <A | |
| 237 HREF="sdlcdopen.html" | |
| 238 ><TT | |
| 239 CLASS="FUNCTION" | |
| 240 >SDL_CDOpen</TT | |
| 241 ></A | |
| 242 >. It represents an opened CDROM device and stores information on the layout of the tracks on the disc.</P | |
| 243 ><P | |
| 244 >A frame is the base data unit of a CD. <TT | |
| 245 CLASS="LITERAL" | |
| 246 >CD_FPS</TT | |
| 247 > frames is equal to 1 second of music. SDL provides two macros for converting between time and frames: <TT | |
| 248 CLASS="LITERAL" | |
| 249 >FRAMES_TO_MSF(f, M,S,F)</TT | |
| 250 > and <TT | |
| 251 CLASS="LITERAL" | |
| 252 >MSF_TO_FRAMES</TT | |
| 253 >.</P | |
| 254 ></DIV | |
| 255 ><DIV | |
| 256 CLASS="REFSECT1" | |
| 257 ><A | |
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258 NAME="AEN7614" |
| 0 | 259 ></A |
| 260 ><H2 | |
| 261 >Examples</H2 | |
| 262 ><PRE | |
| 263 CLASS="PROGRAMLISTING" | |
| 264 >int min, sec, frame; | |
| 265 int frame_offset; | |
| 266 | |
| 267 FRAMES_TO_MSF(cdrom->cur_frame, &min, &sec, &frame); | |
| 268 printf("Current Position: %d minutes, %d seconds, %d frames\n", min, sec, frame); | |
| 269 | |
| 270 frame_offset=MSF_TO_FRAMES(min, sec, frame);</PRE | |
| 271 ></DIV | |
| 272 ><DIV | |
| 273 CLASS="REFSECT1" | |
| 274 ><A | |
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275 NAME="AEN7617" |
| 0 | 276 ></A |
| 277 ><H2 | |
| 278 >See Also</H2 | |
| 279 ><P | |
| 280 ><A | |
| 281 HREF="sdlcdopen.html" | |
| 282 ><TT | |
| 283 CLASS="FUNCTION" | |
| 284 >SDL_CDOpen</TT | |
| 285 ></A | |
| 286 >, | |
| 287 <A | |
| 288 HREF="sdlcdtrack.html" | |
| 289 ><SPAN | |
| 290 CLASS="STRUCTNAME" | |
| 291 >SDL_CDtrack</SPAN | |
| 292 ></A | |
| 293 ></P | |
| 294 ></DIV | |
| 295 ><DIV | |
| 296 CLASS="NAVFOOTER" | |
| 297 ><HR | |
| 298 ALIGN="LEFT" | |
| 299 WIDTH="100%"><TABLE | |
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300 SUMMARY="Footer navigation table" |
| 0 | 301 WIDTH="100%" |
| 302 BORDER="0" | |
| 303 CELLPADDING="0" | |
| 304 CELLSPACING="0" | |
| 305 ><TR | |
| 306 ><TD | |
| 307 WIDTH="33%" | |
| 308 ALIGN="left" | |
| 309 VALIGN="top" | |
| 310 ><A | |
| 311 HREF="sdlcdclose.html" | |
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312 ACCESSKEY="P" |
| 0 | 313 >Prev</A |
| 314 ></TD | |
| 315 ><TD | |
| 316 WIDTH="34%" | |
| 317 ALIGN="center" | |
| 318 VALIGN="top" | |
| 319 ><A | |
| 320 HREF="index.html" | |
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321 ACCESSKEY="H" |
| 0 | 322 >Home</A |
| 323 ></TD | |
| 324 ><TD | |
| 325 WIDTH="33%" | |
| 326 ALIGN="right" | |
| 327 VALIGN="top" | |
| 328 ><A | |
| 329 HREF="sdlcdtrack.html" | |
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330 ACCESSKEY="N" |
| 0 | 331 >Next</A |
| 332 ></TD | |
| 333 ></TR | |
| 334 ><TR | |
| 335 ><TD | |
| 336 WIDTH="33%" | |
| 337 ALIGN="left" | |
| 338 VALIGN="top" | |
| 339 >SDL_CDClose</TD | |
| 340 ><TD | |
| 341 WIDTH="34%" | |
| 342 ALIGN="center" | |
| 343 VALIGN="top" | |
| 344 ><A | |
| 345 HREF="cdrom.html" | |
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346 ACCESSKEY="U" |
| 0 | 347 >Up</A |
| 348 ></TD | |
| 349 ><TD | |
| 350 WIDTH="33%" | |
| 351 ALIGN="right" | |
| 352 VALIGN="top" | |
| 353 >SDL_CDtrack</TD | |
| 354 ></TR | |
| 355 ></TABLE | |
| 356 ></DIV | |
| 357 ></BODY | |
| 358 ></HTML | |
| 359 > |