/**
* Invoke a callback function on each EGL search path.
*
* The first argument of the callback function is the name of the search path.
* The second argument is the length of the name.
*/
void
_eglSearchPathForEach(EGLBoolean (*callback)(const char *, size_t, void *),
void *callback_data)
{
const char *search_path = _eglGetSearchPath();
_eglPreloadForEach(search_path, callback, callback_data);
}
/**
* Add egl_gallium to the module array.
*/
static void
_eglAddGalliumDriver(void)
{
#ifndef _EGL_BUILT_IN_DRIVER_GALLIUM
void *external = (void *) "egl_gallium";
_eglPreloadForEach(_eglGetSearchPath(), _eglLoaderFile, external);
#endif
}
/**
* Add the user driver to the module array.
*
* The user driver is specified by EGL_DRIVER.
*/
static EGLBoolean
_eglAddUserDriver(void)
{
const char *search_path = _eglGetSearchPath();
char *env;
size_t name_len = 0;
env = getenv("EGL_DRIVER");
#if defined(_EGL_OS_UNIX)
if (env && strchr(env, '/')) {
search_path = "";
if ((geteuid() != getuid() || getegid() != getgid())) {
_eglLog(_EGL_DEBUG,
"ignore EGL_DRIVER for setuid/setgid binaries");
env = NULL;
}
}
else if (env) {
char *suffix = strchr(env, '.');
name_len = (suffix) ? suffix - env : strlen(env);
}
#else
if (env)
name_len = strlen(env);
#endif /* _EGL_OS_UNIX */
/*
* Try built-in drivers first if we know the driver name. This makes sure
* we do not load the outdated external driver that is still on the
* filesystem.
*/
if (name_len) {
_EGLModule *mod;
EGLint i;
for (i = 0; _eglBuiltInDrivers[i].name; i++) {
if (strlen(_eglBuiltInDrivers[i].name) == name_len &&
!strncmp(_eglBuiltInDrivers[i].name, env, name_len)) {
mod = _eglAddModule(env);
if (mod)
mod->BuiltIn = _eglBuiltInDrivers[i].main;
return EGL_TRUE;
}
}
}
/* otherwise, treat env as a path */
if (env) {
_eglPreloadForEach(search_path, _eglLoaderFile, (void *) env);
return EGL_TRUE;
}
return EGL_FALSE;
}
/**
* Add drivers to the module array. Drivers will be loaded as they are matched
* to displays.
*/
static EGLBoolean
_eglAddDrivers(void)
{
if (_eglModules)
return EGL_TRUE;
/* the order here decides the priorities of the drivers */
_eglAddUserDriver();
_eglAddDefaultDrivers();
_eglPreloadForEach(_eglGetSearchPath(), _eglLoaderPattern, (void *) "egl_");
return (_eglModules != NULL);
}
/**
* Add the user driver to the module array.
*
* The user driver is specified by EGL_DRIVER.
*/
static void
_eglAddUserDriver(void)
{
const char *search_path = _eglGetSearchPath();
char *env;
env = getenv("EGL_DRIVER");
#if defined(_EGL_OS_UNIX)
if (env && strchr(env, '/')) {
search_path = "";
if ((geteuid() != getuid() || getegid() != getgid())) {
_eglLog(_EGL_DEBUG,
"ignore EGL_DRIVER for setuid/setgid binaries");
env = NULL;
}
}
#endif /* _EGL_OS_UNIX */
if (env)
_eglPreloadForEach(search_path, _eglLoaderFile, (void *) env);
}
/**
* Add default drivers to the module array.
*/
static void
_eglAddDefaultDrivers(void)
{
const char *search_path = _eglGetSearchPath();
EGLint i;
#if defined(_EGL_OS_WINDOWS)
const char *DefaultDriverNames[] = {
"egl_gallium"
};
#elif defined(_EGL_OS_UNIX)
const char *DefaultDriverNames[] = {
"egl_gallium",
"egl_dri2",
"egl_glx"
};
#endif
for (i = 0; i < ARRAY_SIZE(DefaultDriverNames); i++) {
void *name = (void *) DefaultDriverNames[i];
_eglPreloadForEach(search_path, _eglLoaderFile, name);
}
}
