Mercurial > sdl-ios-xcode
annotate docs/html/sdlkeysym.html @ 2787:93764fe8601a
It turns out both the software and the OpenGL renderer had the same problem.
According to the spec, when SDL_SRCALPHA is set, the colorkey is ignored, so
we just need to convert the colorkey into the alpha channel.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 25 Nov 2008 05:29:14 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_keysym</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="SDL Event Structures." | |
| 14 HREF="eventstructures.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_QuitEvent" | |
| 17 HREF="sdlquitevent.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDLKey" | |
| 20 HREF="sdlkey.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="sdlquitevent.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="sdlkey.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="SDLKEYSYM" | |
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74 ></A |
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75 >SDL_keysym</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN4659" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_keysym -- Keysym structure</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN4662" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 Uint8 scancode; | |
| 95 SDLKey sym; | |
| 96 SDLMod mod; | |
| 97 Uint16 unicode; | |
| 98 } SDL_keysym;</PRE | |
| 99 ></DIV | |
| 100 ><DIV | |
| 101 CLASS="REFSECT1" | |
| 102 ><A | |
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103 NAME="AEN4665" |
| 0 | 104 ></A |
| 105 ><H2 | |
| 106 >Structure Data</H2 | |
| 107 ><DIV | |
| 108 CLASS="INFORMALTABLE" | |
| 109 ><A | |
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110 NAME="AEN4667" |
| 0 | 111 ></A |
| 112 ><P | |
| 113 ></P | |
| 114 ><TABLE | |
| 115 BORDER="0" | |
| 116 CLASS="CALSTABLE" | |
| 117 ><TBODY | |
| 118 ><TR | |
| 119 ><TD | |
| 120 ALIGN="LEFT" | |
| 121 VALIGN="TOP" | |
| 122 ><TT | |
| 123 CLASS="STRUCTFIELD" | |
| 124 ><I | |
| 125 >scancode</I | |
| 126 ></TT | |
| 127 ></TD | |
| 128 ><TD | |
| 129 ALIGN="LEFT" | |
| 130 VALIGN="TOP" | |
| 131 >Hardware specific scancode</TD | |
| 132 ></TR | |
| 133 ><TR | |
| 134 ><TD | |
| 135 ALIGN="LEFT" | |
| 136 VALIGN="TOP" | |
| 137 ><TT | |
| 138 CLASS="STRUCTFIELD" | |
| 139 ><I | |
| 140 >sym</I | |
| 141 ></TT | |
| 142 ></TD | |
| 143 ><TD | |
| 144 ALIGN="LEFT" | |
| 145 VALIGN="TOP" | |
| 146 >SDL virtual keysym</TD | |
| 147 ></TR | |
| 148 ><TR | |
| 149 ><TD | |
| 150 ALIGN="LEFT" | |
| 151 VALIGN="TOP" | |
| 152 ><TT | |
| 153 CLASS="STRUCTFIELD" | |
| 154 ><I | |
| 155 >mod</I | |
| 156 ></TT | |
| 157 ></TD | |
| 158 ><TD | |
| 159 ALIGN="LEFT" | |
| 160 VALIGN="TOP" | |
| 161 >Current key modifiers</TD | |
| 162 ></TR | |
| 163 ><TR | |
| 164 ><TD | |
| 165 ALIGN="LEFT" | |
| 166 VALIGN="TOP" | |
| 167 ><TT | |
| 168 CLASS="STRUCTFIELD" | |
| 169 ><I | |
| 170 >unicode</I | |
| 171 ></TT | |
| 172 ></TD | |
| 173 ><TD | |
| 174 ALIGN="LEFT" | |
| 175 VALIGN="TOP" | |
| 176 >Translated character</TD | |
| 177 ></TR | |
| 178 ></TBODY | |
| 179 ></TABLE | |
| 180 ><P | |
| 181 ></P | |
| 182 ></DIV | |
| 183 ></DIV | |
| 184 ><DIV | |
| 185 CLASS="REFSECT1" | |
| 186 ><A | |
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187 NAME="AEN4686" |
| 0 | 188 ></A |
| 189 ><H2 | |
| 190 >Description</H2 | |
| 191 ><P | |
| 192 >The <SPAN | |
| 193 CLASS="STRUCTNAME" | |
| 194 >SDL_keysym</SPAN | |
| 195 > structure is used by reporting key presses and releases since it is a part of the <A | |
| 196 HREF="sdlkeyboardevent.html" | |
| 197 ><SPAN | |
| 198 CLASS="STRUCTNAME" | |
| 199 >SDL_KeyboardEvent</SPAN | |
| 200 ></A | |
| 201 >.</P | |
| 202 ><P | |
| 203 >The <TT | |
| 204 CLASS="STRUCTFIELD" | |
| 205 ><I | |
| 206 >scancode</I | |
| 207 ></TT | |
| 208 > field should generally be left alone, it is the hardware dependent scancode returned by the keyboard. The <TT | |
| 209 CLASS="STRUCTFIELD" | |
| 210 ><I | |
| 211 >sym</I | |
| 212 ></TT | |
| 213 > field is extremely useful. It is the SDL-defined value of the key (see <A | |
| 214 HREF="sdlkey.html" | |
| 215 >SDL Key Syms</A | |
| 216 >. This field is very useful when you are checking for certain key presses, like so: | |
| 217 <PRE | |
| 218 CLASS="PROGRAMLISTING" | |
| 219 >. | |
| 220 . | |
| 221 while(SDL_PollEvent(&event)){ | |
| 222 switch(event.type){ | |
| 223 case SDL_KEYDOWN: | |
| 224 if(event.key.keysym.sym==SDLK_LEFT) | |
| 225 move_left(); | |
| 226 break; | |
| 227 . | |
| 228 . | |
| 229 . | |
| 230 } | |
| 231 } | |
| 232 . | |
| 233 .</PRE | |
| 234 > | |
| 235 <TT | |
| 236 CLASS="STRUCTFIELD" | |
| 237 ><I | |
| 238 >mod</I | |
| 239 ></TT | |
| 240 > stores the current state of the keyboard modifiers as explained in <A | |
| 241 HREF="sdlgetmodstate.html" | |
| 242 ><TT | |
| 243 CLASS="FUNCTION" | |
| 244 >SDL_GetModState</TT | |
| 245 ></A | |
| 246 >. The <TT | |
| 247 CLASS="STRUCTFIELD" | |
| 248 ><I | |
| 249 >unicode</I | |
| 250 ></TT | |
| 251 > is only used when UNICODE translation is enabled with <A | |
| 252 HREF="sdlenableunicode.html" | |
| 253 ><TT | |
| 254 CLASS="FUNCTION" | |
| 255 >SDL_EnableUNICODE</TT | |
| 256 ></A | |
| 257 >. If <TT | |
| 258 CLASS="STRUCTFIELD" | |
| 259 ><I | |
| 260 >unicode</I | |
| 261 ></TT | |
| 262 > is non-zero then this a the UNICODE character corresponding to the keypress. If the high 9 bits of the character are 0, then this maps to the equivalent ASCII character: | |
| 263 <PRE | |
| 264 CLASS="PROGRAMLISTING" | |
| 265 >char ch; | |
| 266 if ( (keysym.unicode & 0xFF80) == 0 ) { | |
| 267 ch = keysym.unicode & 0x7F; | |
| 268 } | |
| 269 else { | |
| 270 printf("An International Character.\n"); | |
| 271 }</PRE | |
| 272 > | |
| 273 UNICODE translation does have a slight overhead so don't enable it unless its needed.</P | |
| 274 ></DIV | |
| 275 ><DIV | |
| 276 CLASS="REFSECT1" | |
| 277 ><A | |
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parents:
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278 NAME="AEN4705" |
| 0 | 279 ></A |
| 280 ><H2 | |
| 281 >See Also</H2 | |
| 282 ><P | |
| 283 ><A | |
| 284 HREF="sdlkey.html" | |
| 285 ><SPAN | |
| 286 CLASS="STRUCTNAME" | |
| 287 >SDLKey</SPAN | |
| 288 ></A | |
| 289 ></P | |
| 290 ></DIV | |
| 291 ><DIV | |
| 292 CLASS="NAVFOOTER" | |
| 293 ><HR | |
| 294 ALIGN="LEFT" | |
| 295 WIDTH="100%"><TABLE | |
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296 SUMMARY="Footer navigation table" |
| 0 | 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="sdlquitevent.html" | |
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308 ACCESSKEY="P" |
| 0 | 309 >Prev</A |
| 310 ></TD | |
| 311 ><TD | |
| 312 WIDTH="34%" | |
| 313 ALIGN="center" | |
| 314 VALIGN="top" | |
| 315 ><A | |
| 316 HREF="index.html" | |
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317 ACCESSKEY="H" |
| 0 | 318 >Home</A |
| 319 ></TD | |
| 320 ><TD | |
| 321 WIDTH="33%" | |
| 322 ALIGN="right" | |
| 323 VALIGN="top" | |
| 324 ><A | |
| 325 HREF="sdlkey.html" | |
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803
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parents:
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326 ACCESSKEY="N" |
| 0 | 327 >Next</A |
| 328 ></TD | |
| 329 ></TR | |
| 330 ><TR | |
| 331 ><TD | |
| 332 WIDTH="33%" | |
| 333 ALIGN="left" | |
| 334 VALIGN="top" | |
| 335 >SDL_QuitEvent</TD | |
| 336 ><TD | |
| 337 WIDTH="34%" | |
| 338 ALIGN="center" | |
| 339 VALIGN="top" | |
| 340 ><A | |
| 341 HREF="eventstructures.html" | |
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803
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parents:
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342 ACCESSKEY="U" |
| 0 | 343 >Up</A |
| 344 ></TD | |
| 345 ><TD | |
| 346 WIDTH="33%" | |
| 347 ALIGN="right" | |
| 348 VALIGN="top" | |
| 349 >SDLKey</TD | |
| 350 ></TR | |
| 351 ></TABLE | |
| 352 ></DIV | |
| 353 ></BODY | |
| 354 ></HTML | |
| 355 > |