| 1 | <HTML |
| 2 | ><HEAD |
| 3 | ><TITLE |
| 4 | >SDL_GL_SetAttribute</TITLE |
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| 16 | TITLE="SDL_GL_GetAttribute" |
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| 19 | TITLE="SDL_GL_SwapBuffers" |
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| 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" |
| 49 | ACCESSKEY="P" |
| 50 | >Prev</A |
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| 60 | VALIGN="bottom" |
| 61 | ><A |
| 62 | HREF="sdlglswapbuffers.html" |
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| 68 | ><HR |
| 69 | ALIGN="LEFT" |
| 70 | WIDTH="100%"></DIV |
| 71 | ><H1 |
| 72 | ><A |
| 73 | NAME="SDLGLSETATTRIBUTE" |
| 74 | ></A |
| 75 | >SDL_GL_SetAttribute</H1 |
| 76 | ><DIV |
| 77 | CLASS="REFNAMEDIV" |
| 78 | ><A |
| 79 | NAME="AEN2742" |
| 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 |
| 87 | NAME="AEN2745" |
| 88 | ></A |
| 89 | ><H2 |
| 90 | >Synopsis</H2 |
| 91 | ><DIV |
| 92 | CLASS="FUNCSYNOPSIS" |
| 93 | ><A |
| 94 | NAME="AEN2746" |
| 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 |
| 118 | NAME="AEN2752" |
| 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 |
| 156 | NAME="AEN2763" |
| 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 |
| 172 | NAME="AEN2768" |
| 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 |
| 205 | NAME="AEN2774" |
| 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 |
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| 266 | >SDL_GL_GetAttribute</TD |
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