Mercurial > sdl-ios-xcode
annotate docs/html/sdlglsetattribute.html @ 1151:be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
if SDL is built with a non-cdecl calling convention, and it's just generally
bad practice anyhow.
Now programs explicitly call SDL_Quit() where appropriate, wrap SDL_Quit() in
a cdecl function where it can't be avoided, and rely on the parachute where
a crash might have hit the atexit() before (these ARE test programs, after
all!).
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 28 Sep 2005 11:36:20 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_GL_SetAttribute</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_GL_GetAttribute" | |
| 17 HREF="sdlglgetattribute.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_GL_SwapBuffers" | |
| 20 HREF="sdlglswapbuffers.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="sdlglgetattribute.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="sdlglswapbuffers.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="SDLGLSETATTRIBUTE" | |
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74 ></A |
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75 >SDL_GL_SetAttribute</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN2742" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_GL_SetAttribute -- Set a special SDL/OpenGL attribute</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN2745" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN2746" |
| 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_GL_SetAttribute</B | |
| 108 ></CODE | |
| 109 >(SDL_GLattr attr, int value);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN2752" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >Sets the OpenGL <A | |
| 124 HREF="sdlglattr.html" | |
| 125 >attribute</A | |
| 126 > <TT | |
| 127 CLASS="PARAMETER" | |
| 128 ><I | |
| 129 >attr</I | |
| 130 ></TT | |
| 131 > to <TT | |
| 132 CLASS="PARAMETER" | |
| 133 ><I | |
| 134 >value</I | |
| 135 ></TT | |
| 136 >. The attributes you set don't take effect until after a call to <A | |
| 137 HREF="sdlsetvideomode.html" | |
| 138 ><TT | |
| 139 CLASS="FUNCTION" | |
| 140 >SDL_SetVideoMode</TT | |
| 141 ></A | |
| 142 >. You should use <A | |
| 143 HREF="sdlglgetattribute.html" | |
| 144 ><TT | |
| 145 CLASS="FUNCTION" | |
| 146 >SDL_GL_GetAttribute</TT | |
| 147 ></A | |
| 148 > to check the values after a <TT | |
| 149 CLASS="FUNCTION" | |
| 150 >SDL_SetVideoMode</TT | |
| 151 > call.</P | |
| 152 ></DIV | |
| 153 ><DIV | |
| 154 CLASS="REFSECT1" | |
| 155 ><A | |
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156 NAME="AEN2763" |
| 0 | 157 ></A |
| 158 ><H2 | |
| 159 >Return Value</H2 | |
| 160 ><P | |
| 161 >Returns <SPAN | |
| 162 CLASS="RETURNVALUE" | |
| 163 >0</SPAN | |
| 164 > on success, or <SPAN | |
| 165 CLASS="RETURNVALUE" | |
| 166 >-1</SPAN | |
| 167 > on error.</P | |
| 168 ></DIV | |
| 169 ><DIV | |
| 170 CLASS="REFSECT1" | |
| 171 ><A | |
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172 NAME="AEN2768" |
| 0 | 173 ></A |
| 174 ><H2 | |
| 175 >Example</H2 | |
| 176 ><PRE | |
| 177 CLASS="PROGRAMLISTING" | |
| 178 >SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 ); | |
| 179 SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 ); | |
| 180 SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 ); | |
| 181 SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 ); | |
| 182 SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); | |
| 183 if ( (screen=SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL )) == NULL ) { | |
| 184 fprintf(stderr, "Couldn't set GL mode: %s\n", SDL_GetError()); | |
| 185 SDL_Quit(); | |
| 186 return; | |
| 187 }</PRE | |
| 188 ><DIV | |
| 189 CLASS="NOTE" | |
| 190 ><BLOCKQUOTE | |
| 191 CLASS="NOTE" | |
| 192 ><P | |
| 193 ><B | |
| 194 >Note: </B | |
| 195 >The <TT | |
| 196 CLASS="LITERAL" | |
| 197 >SDL_DOUBLEBUF</TT | |
| 198 > flag is not required to enable double buffering when setting an OpenGL video mode. Double buffering is enabled or disabled using the SDL_GL_DOUBLEBUFFER attribute.</P | |
| 199 ></BLOCKQUOTE | |
| 200 ></DIV | |
| 201 ></DIV | |
| 202 ><DIV | |
| 203 CLASS="REFSECT1" | |
| 204 ><A | |
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205 NAME="AEN2774" |
| 0 | 206 ></A |
| 207 ><H2 | |
| 208 >See Also</H2 | |
| 209 ><P | |
| 210 ><A | |
| 211 HREF="sdlglgetattribute.html" | |
| 212 ><TT | |
| 213 CLASS="FUNCTION" | |
| 214 >SDL_GL_GetAttribute</TT | |
| 215 ></A | |
| 216 >, | |
| 217 <A | |
| 218 HREF="sdlglattr.html" | |
| 219 >GL Attributes</A | |
| 220 ></P | |
| 221 ></DIV | |
| 222 ><DIV | |
| 223 CLASS="NAVFOOTER" | |
| 224 ><HR | |
| 225 ALIGN="LEFT" | |
| 226 WIDTH="100%"><TABLE | |
|
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227 SUMMARY="Footer navigation table" |
| 0 | 228 WIDTH="100%" |
| 229 BORDER="0" | |
| 230 CELLPADDING="0" | |
| 231 CELLSPACING="0" | |
| 232 ><TR | |
| 233 ><TD | |
| 234 WIDTH="33%" | |
| 235 ALIGN="left" | |
| 236 VALIGN="top" | |
| 237 ><A | |
| 238 HREF="sdlglgetattribute.html" | |
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239 ACCESSKEY="P" |
| 0 | 240 >Prev</A |
| 241 ></TD | |
| 242 ><TD | |
| 243 WIDTH="34%" | |
| 244 ALIGN="center" | |
| 245 VALIGN="top" | |
| 246 ><A | |
| 247 HREF="index.html" | |
|
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248 ACCESSKEY="H" |
| 0 | 249 >Home</A |
| 250 ></TD | |
| 251 ><TD | |
| 252 WIDTH="33%" | |
| 253 ALIGN="right" | |
| 254 VALIGN="top" | |
| 255 ><A | |
| 256 HREF="sdlglswapbuffers.html" | |
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257 ACCESSKEY="N" |
| 0 | 258 >Next</A |
| 259 ></TD | |
| 260 ></TR | |
| 261 ><TR | |
| 262 ><TD | |
| 263 WIDTH="33%" | |
| 264 ALIGN="left" | |
| 265 VALIGN="top" | |
| 266 >SDL_GL_GetAttribute</TD | |
| 267 ><TD | |
| 268 WIDTH="34%" | |
| 269 ALIGN="center" | |
| 270 VALIGN="top" | |
| 271 ><A | |
| 272 HREF="video.html" | |
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273 ACCESSKEY="U" |
| 0 | 274 >Up</A |
| 275 ></TD | |
| 276 ><TD | |
| 277 WIDTH="33%" | |
| 278 ALIGN="right" | |
| 279 VALIGN="top" | |
| 280 >SDL_GL_SwapBuffers</TD | |
| 281 ></TR | |
| 282 ></TABLE | |
| 283 ></DIV | |
| 284 ></BODY | |
| 285 ></HTML | |
| 286 > |