Mercurial > sdl-ios-xcode
annotate docs/html/sdlglgetprocaddress.html @ 693:6c119628180d
Date: Sat, 16 Aug 2003 16:22:56 +0300
From: "Mike Gorchak"
Subject: Package building for QNX6
I'm just completed the package description file for QNX6 - qpg, it is like a\
.spec files for Linux. Please place SDL.qpg.in file in the root of the proj\
ect, where .spec file is placed. And sdl12qpg.diff - just adding the SDL.qpg\
.in. The same for the SDL_image. I'm planning to add .qpg files creation for\
all SDL* projects.
As for shared library building for QNX6. It is very hard to improve the exis\
ting libtool code to support QNX shared libraries. Much easyiest is to remov\
e libtool.m4 code from the acinclude.m4 for those persons, who building shar\
ed libraries for QNX6. I'm described all what they need to do with .so under\
QNX6 in the README.QNX file. And 90% of people used the precompiled librari\
es, so I think it is not big problem :)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 23 Aug 2003 23:25:46 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_GL_GetProcAddress</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_GL_LoadLibrary" | |
| 17 HREF="sdlglloadlibrary.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_GL_GetAttribute" | |
| 20 HREF="sdlglgetattribute.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="sdlglloadlibrary.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="sdlglgetattribute.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="SDLGLGETPROCADDRESS" | |
| 71 >SDL_GL_GetProcAddress</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
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76 NAME="AEN2294" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_GL_GetProcAddress -- Get the address of a GL function</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
|
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84 NAME="AEN2297" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN2298" |
| 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 >void *<B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_GL_GetProcAddress</B | |
| 105 ></CODE | |
| 106 >(const char* proc);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN2304" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Returns the address of the GL function <TT | |
| 121 CLASS="PARAMETER" | |
| 122 ><I | |
| 123 >proc</I | |
| 124 ></TT | |
| 125 >, or <SPAN | |
| 126 CLASS="RETURNVALUE" | |
| 127 >NULL</SPAN | |
| 128 > if the function is not found. If the GL library is loaded at runtime, with <A | |
| 129 HREF="sdlglloadlibrary.html" | |
| 130 ><TT | |
| 131 CLASS="FUNCTION" | |
| 132 >SDL_GL_LoadLibrary</TT | |
| 133 ></A | |
| 134 >, then <I | |
| 135 CLASS="EMPHASIS" | |
| 136 >all</I | |
| 137 > GL functions must be retrieved this way. Usually this is used to retrieve function pointers to OpenGL extensions.</P | |
| 138 ></DIV | |
| 139 ><DIV | |
| 140 CLASS="REFSECT1" | |
| 141 ><A | |
|
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142 NAME="AEN2312" |
| 0 | 143 ></A |
| 144 ><H2 | |
| 145 >Example</H2 | |
| 146 ><PRE | |
| 147 CLASS="PROGRAMLISTING" | |
| 148 >typedef void (*GL_ActiveTextureARB_Func)(unsigned int); | |
| 149 GL_ActiveTextureARB_Func glActiveTextureARB_ptr = 0; | |
| 150 int has_multitexture=1; | |
| 151 . | |
| 152 . | |
| 153 . | |
| 154 /* Get function pointer */ | |
| 155 glActiveTextureARB_ptr=(GL_ActiveTextureARB_Func) SDL_GL_GetProcAddress("glActiveTextureARB"); | |
| 156 | |
| 157 /* Check for a valid function ptr */ | |
| 158 if(!glActiveTextureARB_ptr){ | |
| 159 fprintf(stderr, "Multitexture Extensions not present.\n"); | |
| 160 has_multitexture=0; | |
| 161 } | |
| 162 . | |
| 163 . | |
| 164 . | |
| 165 . | |
| 166 if(has_multitexture){ | |
| 167 glActiveTextureARB_ptr(GL_TEXTURE0_ARB); | |
| 168 . | |
| 169 . | |
| 170 } | |
| 171 else{ | |
| 172 . | |
| 173 . | |
| 174 }</PRE | |
| 175 ></DIV | |
| 176 ><DIV | |
| 177 CLASS="REFSECT1" | |
| 178 ><A | |
|
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179 NAME="AEN2315" |
| 0 | 180 ></A |
| 181 ><H2 | |
| 182 >See Also</H2 | |
| 183 ><P | |
| 184 ><A | |
| 185 HREF="sdlglloadlibrary.html" | |
| 186 ><TT | |
| 187 CLASS="FUNCTION" | |
| 188 >SDL_GL_LoadLibrary</TT | |
| 189 ></A | |
| 190 ></P | |
| 191 ></DIV | |
| 192 ><DIV | |
| 193 CLASS="NAVFOOTER" | |
| 194 ><HR | |
| 195 ALIGN="LEFT" | |
| 196 WIDTH="100%"><TABLE | |
| 197 WIDTH="100%" | |
| 198 BORDER="0" | |
| 199 CELLPADDING="0" | |
| 200 CELLSPACING="0" | |
| 201 ><TR | |
| 202 ><TD | |
| 203 WIDTH="33%" | |
| 204 ALIGN="left" | |
| 205 VALIGN="top" | |
| 206 ><A | |
| 207 HREF="sdlglloadlibrary.html" | |
| 208 >Prev</A | |
| 209 ></TD | |
| 210 ><TD | |
| 211 WIDTH="34%" | |
| 212 ALIGN="center" | |
| 213 VALIGN="top" | |
| 214 ><A | |
| 215 HREF="index.html" | |
| 216 >Home</A | |
| 217 ></TD | |
| 218 ><TD | |
| 219 WIDTH="33%" | |
| 220 ALIGN="right" | |
| 221 VALIGN="top" | |
| 222 ><A | |
| 223 HREF="sdlglgetattribute.html" | |
| 224 >Next</A | |
| 225 ></TD | |
| 226 ></TR | |
| 227 ><TR | |
| 228 ><TD | |
| 229 WIDTH="33%" | |
| 230 ALIGN="left" | |
| 231 VALIGN="top" | |
| 232 >SDL_GL_LoadLibrary</TD | |
| 233 ><TD | |
| 234 WIDTH="34%" | |
| 235 ALIGN="center" | |
| 236 VALIGN="top" | |
| 237 ><A | |
| 238 HREF="video.html" | |
| 239 >Up</A | |
| 240 ></TD | |
| 241 ><TD | |
| 242 WIDTH="33%" | |
| 243 ALIGN="right" | |
| 244 VALIGN="top" | |
| 245 >SDL_GL_GetAttribute</TD | |
| 246 ></TR | |
| 247 ></TABLE | |
| 248 ></DIV | |
| 249 ></BODY | |
| 250 ></HTML | |
| 251 > |