Mercurial > sdl-ios-xcode
annotate docs/html/sdlsetcolors.html @ 2429:2c55b72ba46e gsoc2008_iphone
testdyngles is exactly what it sounds like -- a version of testdyngl that uses OpenGL ES calls instead of OpenGL. Was necessary to create because glOrtho is called glOrthof in OpenGL ES, and OpenGL ES doesn't have glBegin() type semantics for specifying geometry.
| author | Holmes Futrell <hfutrell@umail.ucsb.edu> |
|---|---|
| date | Fri, 15 Aug 2008 00:52:52 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_SetColors</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="Video" | |
| 14 HREF="video.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_Flip" | |
| 17 HREF="sdlflip.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_SetPalette" | |
| 20 HREF="sdlsetpalette.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="sdlflip.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="sdlsetpalette.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="SDLSETCOLORS" | |
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74 ></A |
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75 >SDL_SetColors</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN1462" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_SetColors -- Sets a portion of the colormap for the given 8-bit surface.</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN1465" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN1466" |
| 0 | 95 ></A |
| 96 ><P | |
| 97 ></P | |
| 98 ><PRE | |
| 99 CLASS="FUNCSYNOPSISINFO" | |
| 100 >#include "SDL.h"</PRE | |
| 101 ><P | |
| 102 ><CODE | |
| 103 ><CODE | |
| 104 CLASS="FUNCDEF" | |
| 105 >int <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_SetColors</B | |
| 108 ></CODE | |
| 109 >(SDL_Surface *surface, SDL_Color *colors, int firstcolor, int ncolors);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN1472" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >Sets a portion of the colormap for the given 8-bit surface.</P | |
| 124 ><P | |
| 125 >When <TT | |
| 126 CLASS="PARAMETER" | |
| 127 ><I | |
| 128 >surface</I | |
| 129 ></TT | |
| 130 > is the surface associated with the current | |
| 131 display, the display colormap will be updated with the requested colors. If | |
| 132 <TT | |
| 133 CLASS="LITERAL" | |
| 134 >SDL_HWPALETTE</TT | |
| 135 > was set in <A | |
| 136 HREF="sdlsetvideomode.html" | |
| 137 >SDL_SetVideoMode</A | |
| 138 > flags, | |
| 139 <TT | |
| 140 CLASS="FUNCTION" | |
| 141 >SDL_SetColors</TT | |
| 142 > will always return <SPAN | |
| 143 CLASS="RETURNVALUE" | |
| 144 >1</SPAN | |
| 145 >, | |
| 146 and the palette is guaranteed to be set the way you desire, even if the window | |
| 147 colormap has to be warped or run under emulation.</P | |
| 148 ><P | |
| 149 >The color components of a | |
| 150 <A | |
| 151 HREF="sdlcolor.html" | |
| 152 ><SPAN | |
| 153 CLASS="STRUCTNAME" | |
| 154 >SDL_Color</SPAN | |
| 155 ></A | |
| 156 > | |
| 157 structure are 8-bits in size, giving you a total of 256<SUP | |
| 158 >3</SUP | |
| 159 > | |
| 160 =16777216 colors.</P | |
| 161 ><P | |
| 162 >Palettized (8-bit) screen surfaces with the <TT | |
| 163 CLASS="LITERAL" | |
| 164 >SDL_HWPALETTE</TT | |
| 165 > | |
| 166 flag have two palettes, a logical palette that is used for mapping blits | |
| 167 to/from the surface and a physical palette (that determines how the | |
| 168 hardware will map the colors to the display). <TT | |
| 169 CLASS="FUNCTION" | |
| 170 >SDL_SetColors</TT | |
| 171 > | |
| 172 modifies both palettes (if present), and is equivalent to calling | |
| 173 <A | |
| 174 HREF="sdlsetpalette.html" | |
| 175 >SDL_SetPalette</A | |
| 176 > with the | |
| 177 <TT | |
| 178 CLASS="PARAMETER" | |
| 179 ><I | |
| 180 >flags</I | |
| 181 ></TT | |
| 182 > set to | |
| 183 <TT | |
| 184 CLASS="LITERAL" | |
| 185 >(SDL_LOGPAL | SDL_PHYSPAL)</TT | |
| 186 >.</P | |
| 187 ></DIV | |
| 188 ><DIV | |
| 189 CLASS="REFSECT1" | |
| 190 ><A | |
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191 NAME="AEN1491" |
| 0 | 192 ></A |
| 193 ><H2 | |
| 194 >Return Value</H2 | |
| 195 ><P | |
| 196 >If <TT | |
| 197 CLASS="PARAMETER" | |
| 198 ><I | |
| 199 >surface</I | |
| 200 ></TT | |
| 201 > is not a palettized surface, this function | |
| 202 does nothing, returning <SPAN | |
| 203 CLASS="RETURNVALUE" | |
| 204 >0</SPAN | |
| 205 >. If all of the colors were set | |
| 206 as passed to <TT | |
| 207 CLASS="FUNCTION" | |
| 208 >SDL_SetColors</TT | |
| 209 >, it will return | |
| 210 <SPAN | |
| 211 CLASS="RETURNVALUE" | |
| 212 >1</SPAN | |
| 213 >. If not all the color entries were set exactly as | |
| 214 given, it will return <SPAN | |
| 215 CLASS="RETURNVALUE" | |
| 216 >0</SPAN | |
| 217 >, and you should look at the | |
| 218 surface palette to determine the actual color palette.</P | |
| 219 ></DIV | |
| 220 ><DIV | |
| 221 CLASS="REFSECT1" | |
| 222 ><A | |
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223 NAME="AEN1499" |
| 0 | 224 ></A |
| 225 ><H2 | |
| 226 >Example</H2 | |
| 227 ><PRE | |
| 228 CLASS="PROGRAMLISTING" | |
| 229 >/* Create a display surface with a grayscale palette */ | |
| 230 SDL_Surface *screen; | |
| 231 SDL_Color colors[256]; | |
| 232 int i; | |
| 233 . | |
| 234 . | |
| 235 . | |
| 236 /* Fill colors with color information */ | |
| 237 for(i=0;i<256;i++){ | |
| 238 colors[i].r=i; | |
| 239 colors[i].g=i; | |
| 240 colors[i].b=i; | |
| 241 } | |
| 242 | |
| 243 /* Create display */ | |
| 244 screen=SDL_SetVideoMode(640, 480, 8, SDL_HWPALETTE); | |
| 245 if(!screen){ | |
| 246 printf("Couldn't set video mode: %s\n", SDL_GetError()); | |
| 247 exit(-1); | |
| 248 } | |
| 249 | |
| 250 /* Set palette */ | |
| 251 SDL_SetColors(screen, colors, 0, 256); | |
| 252 . | |
| 253 . | |
| 254 . | |
| 255 .</PRE | |
| 256 ></DIV | |
| 257 ><DIV | |
| 258 CLASS="REFSECT1" | |
| 259 ><A | |
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260 NAME="AEN1502" |
| 0 | 261 ></A |
| 262 ><H2 | |
| 263 >See Also</H2 | |
| 264 ><P | |
| 265 ><A | |
| 266 HREF="sdlcolor.html" | |
| 267 ><SPAN | |
| 268 CLASS="STRUCTNAME" | |
| 269 >SDL_Color</SPAN | |
| 270 ></A | |
| 271 > | |
| 272 <A | |
| 273 HREF="sdlsurface.html" | |
| 274 ><SPAN | |
| 275 CLASS="STRUCTNAME" | |
| 276 >SDL_Surface</SPAN | |
| 277 ></A | |
| 278 >, | |
| 279 <A | |
| 280 HREF="sdlsetpalette.html" | |
| 281 ><TT | |
| 282 CLASS="FUNCTION" | |
| 283 >SDL_SetPalette</TT | |
| 284 ></A | |
| 285 >, | |
| 286 <A | |
| 287 HREF="sdlsetvideomode.html" | |
| 288 ><TT | |
| 289 CLASS="FUNCTION" | |
| 290 >SDL_SetVideoMode</TT | |
| 291 ></A | |
| 292 ></P | |
| 293 ></DIV | |
| 294 ><DIV | |
| 295 CLASS="NAVFOOTER" | |
| 296 ><HR | |
| 297 ALIGN="LEFT" | |
| 298 WIDTH="100%"><TABLE | |
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299 SUMMARY="Footer navigation table" |
| 0 | 300 WIDTH="100%" |
| 301 BORDER="0" | |
| 302 CELLPADDING="0" | |
| 303 CELLSPACING="0" | |
| 304 ><TR | |
| 305 ><TD | |
| 306 WIDTH="33%" | |
| 307 ALIGN="left" | |
| 308 VALIGN="top" | |
| 309 ><A | |
| 310 HREF="sdlflip.html" | |
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311 ACCESSKEY="P" |
| 0 | 312 >Prev</A |
| 313 ></TD | |
| 314 ><TD | |
| 315 WIDTH="34%" | |
| 316 ALIGN="center" | |
| 317 VALIGN="top" | |
| 318 ><A | |
| 319 HREF="index.html" | |
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320 ACCESSKEY="H" |
| 0 | 321 >Home</A |
| 322 ></TD | |
| 323 ><TD | |
| 324 WIDTH="33%" | |
| 325 ALIGN="right" | |
| 326 VALIGN="top" | |
| 327 ><A | |
| 328 HREF="sdlsetpalette.html" | |
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329 ACCESSKEY="N" |
| 0 | 330 >Next</A |
| 331 ></TD | |
| 332 ></TR | |
| 333 ><TR | |
| 334 ><TD | |
| 335 WIDTH="33%" | |
| 336 ALIGN="left" | |
| 337 VALIGN="top" | |
| 338 >SDL_Flip</TD | |
| 339 ><TD | |
| 340 WIDTH="34%" | |
| 341 ALIGN="center" | |
| 342 VALIGN="top" | |
| 343 ><A | |
| 344 HREF="video.html" | |
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345 ACCESSKEY="U" |
| 0 | 346 >Up</A |
| 347 ></TD | |
| 348 ><TD | |
| 349 WIDTH="33%" | |
| 350 ALIGN="right" | |
| 351 VALIGN="top" | |
| 352 >SDL_SetPalette</TD | |
| 353 ></TR | |
| 354 ></TABLE | |
| 355 ></DIV | |
| 356 ></BODY | |
| 357 ></HTML | |
| 358 > |