Mercurial > sdl-ios-xcode
annotate docs/html/sdlsetcolors.html @ 181:e5bc29de3f0a
Updated from the SDL Documentation Project
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 14 Sep 2001 02:41:09 +0000 |
| parents | 55f1f1b3e27d |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 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 1.64 |
| 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 | |
| 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="sdlflip.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="sdlsetpalette.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="SDLSETCOLORS" | |
| 71 >SDL_SetColors</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN1078" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_SetColors -- Sets a portion of the colormap for the given 8-bit surface.</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
|
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84 NAME="AEN1081" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
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91 NAME="AEN1082" |
| 0 | 92 ></A |
| 93 ><P | |
| 94 ></P | |
| 95 ><PRE | |
| 96 CLASS="FUNCSYNOPSISINFO" | |
| 97 >#include "SDL.h"</PRE | |
| 98 ><P | |
| 99 ><CODE | |
| 100 ><CODE | |
| 101 CLASS="FUNCDEF" | |
| 102 >int <B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_SetColors</B | |
| 105 ></CODE | |
| 106 >(SDL_Surface *surface, SDL_Color *colors, int firstcolor, int ncolors);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN1088" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Sets a portion of the colormap for the given 8-bit surface.</P | |
| 121 ><P | |
| 122 >When <TT | |
| 123 CLASS="PARAMETER" | |
| 124 ><I | |
| 125 >surface</I | |
| 126 ></TT | |
| 127 > is the surface associated with the current | |
| 128 display, the display colormap will be updated with the requested colors. If | |
| 129 <TT | |
| 130 CLASS="LITERAL" | |
| 131 >SDL_HWPALETTE</TT | |
| 132 > was set in <A | |
| 133 HREF="sdlsetvideomode.html" | |
| 134 >SDL_SetVideoMode</A | |
| 135 > flags, | |
| 136 <TT | |
| 137 CLASS="FUNCTION" | |
| 138 >SDL_SetColors</TT | |
| 139 > will always return <SPAN | |
| 140 CLASS="RETURNVALUE" | |
| 141 >1</SPAN | |
| 142 >, | |
| 143 and the palette is guaranteed to be set the way you desire, even if the window | |
| 144 colormap has to be warped or run under emulation.</P | |
| 145 ><P | |
| 146 >The color components of a | |
| 147 <A | |
| 148 HREF="sdlcolor.html" | |
| 149 ><SPAN | |
| 150 CLASS="STRUCTNAME" | |
| 151 >SDL_Color</SPAN | |
| 152 ></A | |
| 153 > | |
| 154 structure are 8-bits in size, giving you a total of 256<SUP | |
| 155 >3</SUP | |
| 156 > | |
| 157 =16777216 colors.</P | |
| 158 ><P | |
| 159 >Palettized (8-bit) screen surfaces with the <TT | |
| 160 CLASS="LITERAL" | |
| 161 >SDL_HWPALETTE</TT | |
| 162 > | |
| 163 flag have two palettes, a logical palette that is used for mapping blits | |
| 164 to/from the surface and a physical palette (that determines how the | |
| 165 hardware will map the colors to the display). <TT | |
| 166 CLASS="FUNCTION" | |
| 167 >SDL_SetColors</TT | |
| 168 > | |
| 169 modifies both palettes (if present), and is equivalent to calling | |
| 170 <A | |
| 171 HREF="sdlsetpalette.html" | |
| 172 >SDL_SetPalette</A | |
| 173 > with the | |
| 174 <TT | |
| 175 CLASS="PARAMETER" | |
| 176 ><I | |
| 177 >flags</I | |
| 178 ></TT | |
| 179 > set to | |
| 180 <TT | |
| 181 CLASS="LITERAL" | |
| 182 >(SDL_LOGPAL | SDL_PHYSPAL)</TT | |
| 183 >.</P | |
| 184 ></DIV | |
| 185 ><DIV | |
| 186 CLASS="REFSECT1" | |
| 187 ><A | |
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188 NAME="AEN1107" |
| 0 | 189 ></A |
| 190 ><H2 | |
| 191 >Return Value</H2 | |
| 192 ><P | |
| 193 >If <TT | |
| 194 CLASS="PARAMETER" | |
| 195 ><I | |
| 196 >surface</I | |
| 197 ></TT | |
| 198 > is not a palettized surface, this function | |
| 199 does nothing, returning <SPAN | |
| 200 CLASS="RETURNVALUE" | |
| 201 >0</SPAN | |
| 202 >. If all of the colors were set | |
| 203 as passed to <TT | |
| 204 CLASS="FUNCTION" | |
| 205 >SDL_SetColors</TT | |
| 206 >, it will return | |
| 207 <SPAN | |
| 208 CLASS="RETURNVALUE" | |
| 209 >1</SPAN | |
| 210 >. If not all the color entries were set exactly as | |
| 211 given, it will return <SPAN | |
| 212 CLASS="RETURNVALUE" | |
| 213 >0</SPAN | |
| 214 >, and you should look at the | |
| 215 surface palette to determine the actual color palette.</P | |
| 216 ></DIV | |
| 217 ><DIV | |
| 218 CLASS="REFSECT1" | |
| 219 ><A | |
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220 NAME="AEN1115" |
| 0 | 221 ></A |
| 222 ><H2 | |
| 223 >Example</H2 | |
| 224 ><PRE | |
| 225 CLASS="PROGRAMLISTING" | |
| 226 >/* Create a display surface with a grayscale palette */ | |
| 227 SDL_Surface *screen; | |
| 228 SDL_Color colors[256]; | |
| 229 int i; | |
| 230 . | |
| 231 . | |
| 232 . | |
| 233 /* Fill colors with color information */ | |
| 234 for(i=0;i<256;i++){ | |
| 235 colors[i].r=i; | |
| 236 colors[i].g=i; | |
| 237 colors[i].b=i; | |
| 238 } | |
| 239 | |
| 240 /* Create display */ | |
| 241 screen=SDL_SetVideoMode(640, 480, 8, SDL_HWPALETTE); | |
| 242 if(!screen){ | |
| 243 printf("Couldn't set video mode: %s\n", SDL_GetError()); | |
| 244 exit(-1); | |
| 245 } | |
| 246 | |
| 247 /* Set palette */ | |
| 248 SDL_SetColors(screen, colors, 0, 256); | |
| 249 . | |
| 250 . | |
| 251 . | |
| 252 .</PRE | |
| 253 ></DIV | |
| 254 ><DIV | |
| 255 CLASS="REFSECT1" | |
| 256 ><A | |
|
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257 NAME="AEN1118" |
| 0 | 258 ></A |
| 259 ><H2 | |
| 260 >See Also</H2 | |
| 261 ><P | |
| 262 ><A | |
| 263 HREF="sdlcolor.html" | |
| 264 ><SPAN | |
| 265 CLASS="STRUCTNAME" | |
| 266 >SDL_Color</SPAN | |
| 267 ></A | |
| 268 > | |
| 269 <A | |
| 270 HREF="sdlsurface.html" | |
| 271 ><SPAN | |
| 272 CLASS="STRUCTNAME" | |
| 273 >SDL_Surface</SPAN | |
| 274 ></A | |
| 275 >, | |
| 276 <A | |
| 277 HREF="sdlsetpalette.html" | |
| 278 ><TT | |
| 279 CLASS="FUNCTION" | |
| 280 >SDL_SetPalette</TT | |
| 281 ></A | |
| 282 >, | |
| 283 <A | |
| 284 HREF="sdlsetvideomode.html" | |
| 285 ><TT | |
| 286 CLASS="FUNCTION" | |
| 287 >SDL_SetVideoMode</TT | |
| 288 ></A | |
| 289 ></P | |
| 290 ></DIV | |
| 291 ><DIV | |
| 292 CLASS="NAVFOOTER" | |
| 293 ><HR | |
| 294 ALIGN="LEFT" | |
| 295 WIDTH="100%"><TABLE | |
| 296 WIDTH="100%" | |
| 297 BORDER="0" | |
| 298 CELLPADDING="0" | |
| 299 CELLSPACING="0" | |
| 300 ><TR | |
| 301 ><TD | |
| 302 WIDTH="33%" | |
| 303 ALIGN="left" | |
| 304 VALIGN="top" | |
| 305 ><A | |
| 306 HREF="sdlflip.html" | |
| 307 >Prev</A | |
| 308 ></TD | |
| 309 ><TD | |
| 310 WIDTH="34%" | |
| 311 ALIGN="center" | |
| 312 VALIGN="top" | |
| 313 ><A | |
| 314 HREF="index.html" | |
| 315 >Home</A | |
| 316 ></TD | |
| 317 ><TD | |
| 318 WIDTH="33%" | |
| 319 ALIGN="right" | |
| 320 VALIGN="top" | |
| 321 ><A | |
| 322 HREF="sdlsetpalette.html" | |
| 323 >Next</A | |
| 324 ></TD | |
| 325 ></TR | |
| 326 ><TR | |
| 327 ><TD | |
| 328 WIDTH="33%" | |
| 329 ALIGN="left" | |
| 330 VALIGN="top" | |
| 331 >SDL_Flip</TD | |
| 332 ><TD | |
| 333 WIDTH="34%" | |
| 334 ALIGN="center" | |
| 335 VALIGN="top" | |
| 336 ><A | |
| 337 HREF="video.html" | |
| 338 >Up</A | |
| 339 ></TD | |
| 340 ><TD | |
| 341 WIDTH="33%" | |
| 342 ALIGN="right" | |
| 343 VALIGN="top" | |
| 344 >SDL_SetPalette</TD | |
| 345 ></TR | |
| 346 ></TABLE | |
| 347 ></DIV | |
| 348 ></BODY | |
| 349 ></HTML | |
| 350 > |