eleni.mutantstargoat.com Git - libgliar/blob - src/gliar.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <stdlib.h>
   4 #include <unistd.h>
   5 #include <dlfcn.h>
   6 #include <pwd.h>
   7 #include <GL/gl.h>
   8 #include "cfg.h"
   9
  10 static int done_init;
  11 static const GLubyte* (*gl_get_string)(GLenum);
  12 static struct cfgopt *cfglist;
  13
  14 static int init(void)
  15 {
  16         if(done_init) {
  17                 return 0;
  18         }
  19
  20         if(!(cfglist = gliar_load_cfg("gliar.conf"))) {
  21                 struct passwd *pw;
  22                 char *homedir, *path;
  23
  24                 if((pw = getpwuid(getuid()))) {
  25                         homedir = pw->pw_dir;
  26                 } else {
  27                         homedir = getenv("HOME");
  28                 }
  29
  30                 if(homedir) {
  31                         path = alloca(strlen(homedir) + strlen(".gliar.conf") + 2);
  32                         sprintf(path, "%s/.gliar.conf", homedir);
  33
  34                         cfglist = gliar_load_cfg(path);
  35                 }
  36         }
  37
  38         gl_get_string = dlsym(RTLD_NEXT, "glGetString");
  39
  40         done_init = 1;
  41         return 0;
  42 }
  43
  44 const GLubyte *glGetString(GLenum name)
  45 {
  46         const char *key, *value;
  47
  48         init();
  49
  50         switch(name) {
  51         case GL_VENDOR:
  52                 key = "vendor";
  53                 break;
  54
  55         case GL_VERSION:
  56                 key = "version";
  57                 break;
  58
  59         case GL_EXTENSIONS:
  60                 key = "extensions";
  61                 break;
  62
  63         default:
  64                 key = 0;
  65         }
  66
  67         if(key && (value = gliar_find_opt(cfglist, key))) {
  68                 return value;
  69         }
  70
  71         return gl_get_string(name);
  72 }