Mercurial > sdl-ios-xcode
annotate docs/html/sdlcd.html @ 270:37fa1484f71b
From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
To: slouken@devolution.com
Subject: Re: [SDL] Question about SDL_FillRect()
I benchmarked with and without clipping UpdateRects and was unable to find
any difference on my moderately slow machine. Anyway, I haven't added
clipping in this patch, but fixed a couple of bugs and generally cleaned
up some of the X11 image code. Most importantly, UpdateRects now checks
for both zero height and width. Also, I eliminated the entire code to
byteswap X11 images since X11 can do that automatically if you ask it
nicely :-)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 18 Jan 2002 22:02:03 +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 > |