Mercurial > sdl-ios-xcode
annotate docs/html/sdljoystickopen.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 |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_JoystickOpen</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="Joystick" | |
| 14 HREF="joystick.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_JoystickName" | |
| 17 HREF="sdljoystickname.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_JoystickOpened" | |
| 20 HREF="sdljoystickopened.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="sdljoystickname.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="sdljoystickopened.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="SDLJOYSTICKOPEN" | |
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74 ></A |
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75 >SDL_JoystickOpen</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN6096" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_JoystickOpen -- Opens a joystick for use.</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN6099" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN6100" |
| 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 >SDL_Joystick *<B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_JoystickOpen</B | |
| 108 ></CODE | |
| 109 >(int index);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN6106" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >Opens a joystick for use within SDL. The <TT | |
| 124 CLASS="PARAMETER" | |
| 125 ><I | |
| 126 >index</I | |
| 127 ></TT | |
| 128 > refers to the N'th joystick in the system. A joystick must be opened before it game be used.</P | |
| 129 ></DIV | |
| 130 ><DIV | |
| 131 CLASS="REFSECT1" | |
| 132 ><A | |
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133 NAME="AEN6110" |
| 0 | 134 ></A |
| 135 ><H2 | |
| 136 >Return Value</H2 | |
| 137 ><P | |
| 138 >Returns a <SPAN | |
| 139 CLASS="STRUCTNAME" | |
| 140 >SDL_Joystick</SPAN | |
| 141 > structure on success. <SPAN | |
| 142 CLASS="RETURNVALUE" | |
| 143 >NULL</SPAN | |
| 144 > on failure.</P | |
| 145 ></DIV | |
| 146 ><DIV | |
| 147 CLASS="REFSECT1" | |
| 148 ><A | |
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149 NAME="AEN6115" |
| 0 | 150 ></A |
| 151 ><H2 | |
| 152 >Examples</H2 | |
| 153 ><P | |
| 154 ><PRE | |
| 155 CLASS="PROGRAMLISTING" | |
| 156 >SDL_Joystick *joy; | |
| 157 // Check for joystick | |
| 158 if(SDL_NumJoysticks()>0){ | |
| 159 // Open joystick | |
| 160 joy=SDL_JoystickOpen(0); | |
| 161 | |
| 162 if(joy) | |
| 163 { | |
| 164 printf("Opened Joystick 0\n"); | |
| 165 printf("Name: %s\n", SDL_JoystickName(0)); | |
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166 printf("Number of Axes: %d\n", SDL_JoystickNumAxes(joy)); |
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167 printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(joy)); |
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168 printf("Number of Balls: %d\n", SDL_JoystickNumBalls(joy)); |
| 0 | 169 } |
| 170 else | |
| 171 printf("Couldn't open Joystick 0\n"); | |
| 172 | |
| 173 // Close if opened | |
| 174 if(SDL_JoystickOpened(0)) | |
| 175 SDL_JoystickClose(joy); | |
| 176 }</PRE | |
| 177 ></P | |
| 178 ></DIV | |
| 179 ><DIV | |
| 180 CLASS="REFSECT1" | |
| 181 ><A | |
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182 NAME="AEN6119" |
| 0 | 183 ></A |
| 184 ><H2 | |
| 185 >See Also</H2 | |
| 186 ><P | |
| 187 ><A | |
| 188 HREF="sdljoystickclose.html" | |
| 189 ><TT | |
| 190 CLASS="FUNCTION" | |
| 191 >SDL_JoystickClose</TT | |
| 192 ></A | |
| 193 ></P | |
| 194 ></DIV | |
| 195 ><DIV | |
| 196 CLASS="NAVFOOTER" | |
| 197 ><HR | |
| 198 ALIGN="LEFT" | |
| 199 WIDTH="100%"><TABLE | |
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200 SUMMARY="Footer navigation table" |
| 0 | 201 WIDTH="100%" |
| 202 BORDER="0" | |
| 203 CELLPADDING="0" | |
| 204 CELLSPACING="0" | |
| 205 ><TR | |
| 206 ><TD | |
| 207 WIDTH="33%" | |
| 208 ALIGN="left" | |
| 209 VALIGN="top" | |
| 210 ><A | |
| 211 HREF="sdljoystickname.html" | |
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212 ACCESSKEY="P" |
| 0 | 213 >Prev</A |
| 214 ></TD | |
| 215 ><TD | |
| 216 WIDTH="34%" | |
| 217 ALIGN="center" | |
| 218 VALIGN="top" | |
| 219 ><A | |
| 220 HREF="index.html" | |
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221 ACCESSKEY="H" |
| 0 | 222 >Home</A |
| 223 ></TD | |
| 224 ><TD | |
| 225 WIDTH="33%" | |
| 226 ALIGN="right" | |
| 227 VALIGN="top" | |
| 228 ><A | |
| 229 HREF="sdljoystickopened.html" | |
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230 ACCESSKEY="N" |
| 0 | 231 >Next</A |
| 232 ></TD | |
| 233 ></TR | |
| 234 ><TR | |
| 235 ><TD | |
| 236 WIDTH="33%" | |
| 237 ALIGN="left" | |
| 238 VALIGN="top" | |
| 239 >SDL_JoystickName</TD | |
| 240 ><TD | |
| 241 WIDTH="34%" | |
| 242 ALIGN="center" | |
| 243 VALIGN="top" | |
| 244 ><A | |
| 245 HREF="joystick.html" | |
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246 ACCESSKEY="U" |
| 0 | 247 >Up</A |
| 248 ></TD | |
| 249 ><TD | |
| 250 WIDTH="33%" | |
| 251 ALIGN="right" | |
| 252 VALIGN="top" | |
| 253 >SDL_JoystickOpened</TD | |
| 254 ></TR | |
| 255 ></TABLE | |
| 256 ></DIV | |
| 257 ></BODY | |
| 258 ></HTML | |
| 259 > |