Mercurial > sdl-ios-xcode
annotate docs/html/sdlpalette.html @ 1257:448a9a64537b
[PATCH] SDL_GetVideoMode() does not find best mode, part 2
Following commit 1.51, I come accross a problem when SDL must choose between
several video modes that could suit the one asked.
If I ask 320x240 with this list:
768x480 768x240 640x400 640x200 384x480 384x240 320x400 320x200
The smallest selectables modes are 384x240 and 320x400. And SDL choose the later
in this list, but 384x240 is more suitable. So I added a check to compare
the pixel count (surface) of modes, and select the one which has the smallest
pixel count.
In my example, 384x240 has 92160 pixels, and 320x400 has 128000 pixels. So now
SDL will choose 384x240 for the asked 320x240 mode.
| author | Patrice Mandin <patmandin@gmail.com> |
|---|---|
| date | Thu, 19 Jan 2006 21:28:52 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_Palette</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_Color" | |
| 17 HREF="sdlcolor.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_PixelFormat" | |
| 20 HREF="sdlpixelformat.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="sdlcolor.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="sdlpixelformat.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="SDLPALETTE" | |
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74 ></A |
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75 >SDL_Palette</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN3129" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_Palette -- Color palette for 8-bit pixel formats</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN3132" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 int ncolors; | |
| 95 SDL_Color *colors; | |
| 96 } SDL_Palette;</PRE | |
| 97 ></DIV | |
| 98 ><DIV | |
| 99 CLASS="REFSECT1" | |
| 100 ><A | |
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101 NAME="AEN3135" |
| 0 | 102 ></A |
| 103 ><H2 | |
| 104 >Structure Data</H2 | |
| 105 ><DIV | |
| 106 CLASS="INFORMALTABLE" | |
| 107 ><A | |
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108 NAME="AEN3137" |
| 0 | 109 ></A |
| 110 ><P | |
| 111 ></P | |
| 112 ><TABLE | |
| 113 BORDER="0" | |
| 114 CLASS="CALSTABLE" | |
| 115 ><TBODY | |
| 116 ><TR | |
| 117 ><TD | |
| 118 ALIGN="LEFT" | |
| 119 VALIGN="TOP" | |
| 120 ><TT | |
| 121 CLASS="STRUCTFIELD" | |
| 122 ><I | |
| 123 >ncolors</I | |
| 124 ></TT | |
| 125 ></TD | |
| 126 ><TD | |
| 127 ALIGN="LEFT" | |
| 128 VALIGN="TOP" | |
| 129 >Number of colors used in this palette</TD | |
| 130 ></TR | |
| 131 ><TR | |
| 132 ><TD | |
| 133 ALIGN="LEFT" | |
| 134 VALIGN="TOP" | |
| 135 ><TT | |
| 136 CLASS="STRUCTFIELD" | |
| 137 ><I | |
| 138 >colors</I | |
| 139 ></TT | |
| 140 ></TD | |
| 141 ><TD | |
| 142 ALIGN="LEFT" | |
| 143 VALIGN="TOP" | |
| 144 >Pointer to <A | |
| 145 HREF="sdlcolor.html" | |
| 146 ><SPAN | |
| 147 CLASS="STRUCTNAME" | |
| 148 >SDL_Color</SPAN | |
| 149 ></A | |
| 150 > structures that make up the palette.</TD | |
| 151 ></TR | |
| 152 ></TBODY | |
| 153 ></TABLE | |
| 154 ><P | |
| 155 ></P | |
| 156 ></DIV | |
| 157 ></DIV | |
| 158 ><DIV | |
| 159 CLASS="REFSECT1" | |
| 160 ><A | |
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161 NAME="AEN3150" |
| 0 | 162 ></A |
| 163 ><H2 | |
| 164 >Description</H2 | |
| 165 ><P | |
| 166 >Each pixel in an 8-bit surface is an index into the <TT | |
| 167 CLASS="STRUCTFIELD" | |
| 168 ><I | |
| 169 >colors</I | |
| 170 ></TT | |
| 171 > field of the <SPAN | |
| 172 CLASS="STRUCTNAME" | |
| 173 >SDL_Palette</SPAN | |
| 174 > structure store in <A | |
| 175 HREF="sdlpixelformat.html" | |
| 176 ><SPAN | |
| 177 CLASS="STRUCTNAME" | |
| 178 >SDL_PixelFormat</SPAN | |
| 179 ></A | |
| 180 >. A <SPAN | |
| 181 CLASS="STRUCTNAME" | |
| 182 >SDL_Palette</SPAN | |
| 183 > should never need to be created manually. It is automatically created when SDL allocates a <SPAN | |
| 184 CLASS="STRUCTNAME" | |
| 185 >SDL_PixelFormat</SPAN | |
| 186 > for a surface. The colors values of a <A | |
| 187 HREF="sdlsurface.html" | |
| 188 ><SPAN | |
| 189 CLASS="STRUCTNAME" | |
| 190 >SDL_Surface</SPAN | |
| 191 ></A | |
| 192 >s palette can be set with the <A | |
| 193 HREF="sdlsetcolors.html" | |
| 194 ><TT | |
| 195 CLASS="FUNCTION" | |
| 196 >SDL_SetColors</TT | |
| 197 ></A | |
| 198 >.</P | |
| 199 ></DIV | |
| 200 ><DIV | |
| 201 CLASS="REFSECT1" | |
| 202 ><A | |
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203 NAME="AEN3163" |
| 0 | 204 ></A |
| 205 ><H2 | |
| 206 >See Also</H2 | |
| 207 ><P | |
| 208 ><A | |
| 209 HREF="sdlcolor.html" | |
| 210 ><SPAN | |
| 211 CLASS="STRUCTNAME" | |
| 212 >SDL_Color</SPAN | |
| 213 ></A | |
| 214 >, | |
| 215 <A | |
| 216 HREF="sdlsurface.html" | |
| 217 ><SPAN | |
| 218 CLASS="STRUCTNAME" | |
| 219 >SDL_Surface</SPAN | |
| 220 ></A | |
| 221 >, | |
| 222 <A | |
| 223 HREF="sdlsetcolors.html" | |
| 224 ><TT | |
| 225 CLASS="FUNCTION" | |
| 226 >SDL_SetColors</TT | |
| 227 ></A | |
| 228 > | |
| 229 <A | |
| 230 HREF="sdlsetpalette.html" | |
| 231 ><TT | |
| 232 CLASS="FUNCTION" | |
| 233 >SDL_SetPalette</TT | |
| 234 ></A | |
| 235 ></P | |
| 236 ></DIV | |
| 237 ><DIV | |
| 238 CLASS="NAVFOOTER" | |
| 239 ><HR | |
| 240 ALIGN="LEFT" | |
| 241 WIDTH="100%"><TABLE | |
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242 SUMMARY="Footer navigation table" |
| 0 | 243 WIDTH="100%" |
| 244 BORDER="0" | |
| 245 CELLPADDING="0" | |
| 246 CELLSPACING="0" | |
| 247 ><TR | |
| 248 ><TD | |
| 249 WIDTH="33%" | |
| 250 ALIGN="left" | |
| 251 VALIGN="top" | |
| 252 ><A | |
| 253 HREF="sdlcolor.html" | |
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254 ACCESSKEY="P" |
| 0 | 255 >Prev</A |
| 256 ></TD | |
| 257 ><TD | |
| 258 WIDTH="34%" | |
| 259 ALIGN="center" | |
| 260 VALIGN="top" | |
| 261 ><A | |
| 262 HREF="index.html" | |
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263 ACCESSKEY="H" |
| 0 | 264 >Home</A |
| 265 ></TD | |
| 266 ><TD | |
| 267 WIDTH="33%" | |
| 268 ALIGN="right" | |
| 269 VALIGN="top" | |
| 270 ><A | |
| 271 HREF="sdlpixelformat.html" | |
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parents:
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272 ACCESSKEY="N" |
| 0 | 273 >Next</A |
| 274 ></TD | |
| 275 ></TR | |
| 276 ><TR | |
| 277 ><TD | |
| 278 WIDTH="33%" | |
| 279 ALIGN="left" | |
| 280 VALIGN="top" | |
| 281 >SDL_Color</TD | |
| 282 ><TD | |
| 283 WIDTH="34%" | |
| 284 ALIGN="center" | |
| 285 VALIGN="top" | |
| 286 ><A | |
| 287 HREF="video.html" | |
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288 ACCESSKEY="U" |
| 0 | 289 >Up</A |
| 290 ></TD | |
| 291 ><TD | |
| 292 WIDTH="33%" | |
| 293 ALIGN="right" | |
| 294 VALIGN="top" | |
| 295 >SDL_PixelFormat</TD | |
| 296 ></TR | |
| 297 ></TABLE | |
| 298 ></DIV | |
| 299 ></BODY | |
| 300 ></HTML | |
| 301 > |