/*
* Given a display pointer and screen number, determine the name of
* the DRI driver for the screen. (I.e. "r128", "tdfx", etc).
* Return True for success, False for failure.
*/
static Bool GetDriverName(Display *dpy, int scrNum, char **driverName)
{
int directCapable;
Bool b;
int driverMajor, driverMinor, driverPatch;
*driverName = NULL;
if (!XF86DRIQueryDirectRenderingCapable(dpy, scrNum, &directCapable)) {
ErrorMessageF("XF86DRIQueryDirectRenderingCapable failed\n");
return False;
}
if (!directCapable) {
ErrorMessageF("XF86DRIQueryDirectRenderingCapable returned false\n");
return False;
}
b = XF86DRIGetClientDriverName(dpy, scrNum, &driverMajor, &driverMinor,
&driverPatch, driverName);
if (!b) {
ErrorMessageF("Cannot determine driver name for screen %d\n", scrNum);
return False;
}
InfoMessageF("XF86DRIGetClientDriverName: %d.%d.%d %s (screen %d)\n",
driverMajor, driverMinor, driverPatch, *driverName, scrNum);
return True;
}
/*
* Given a display pointer and screen number, determine the name of
* the DRI driver for the screen (i.e., "i965", "radeon", "nouveau", etc).
* Return True for success, False for failure.
*/
static Bool
driGetDriverName(Display * dpy, int scrNum, char **driverName)
{
int directCapable;
Bool b;
int event, error;
int driverMajor, driverMinor, driverPatch;
*driverName = NULL;
if (XF86DRIQueryExtension(dpy, &event, &error)) { /* DRI1 */
if (!XF86DRIQueryDirectRenderingCapable(dpy, scrNum, &directCapable)) {
ErrorMessageF("XF86DRIQueryDirectRenderingCapable failed\n");
return False;
}
if (!directCapable) {
ErrorMessageF("XF86DRIQueryDirectRenderingCapable returned false\n");
return False;
}
b = XF86DRIGetClientDriverName(dpy, scrNum, &driverMajor, &driverMinor,
&driverPatch, driverName);
if (!b) {
ErrorMessageF("Cannot determine driver name for screen %d\n",
scrNum);
return False;
}
InfoMessageF("XF86DRIGetClientDriverName: %d.%d.%d %s (screen %d)\n",
driverMajor, driverMinor, driverPatch, *driverName,
scrNum);
return True;
}
else if (DRI2QueryExtension(dpy, &event, &error)) { /* DRI2 */
char *dev;
Bool ret = DRI2Connect(dpy, RootWindow(dpy, scrNum), driverName, &dev);
if (ret)
free(dev);
return ret;
}
return False;
}
/**
* Try to \c dlopen the named driver.
*
* This function adds the "_dri.so" suffix to the driver name and searches the
* directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
* order to find the driver.
*
* \param driverName - a name like "i965", "radeon", "nouveau", etc.
*
* \returns
* A handle from \c dlopen, or \c NULL if driver file not found.
*/
_X_HIDDEN void *
driOpenDriver(const char *driverName)
{
void *glhandle, *handle;
const char *libPaths, *p, *next;
char realDriverName[200];
int len;
/* Attempt to make sure libGL symbols will be visible to the driver */
glhandle = dlopen(GL_LIB_NAME, RTLD_NOW | RTLD_GLOBAL);
libPaths = NULL;
if (geteuid() == getuid()) {
/* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
libPaths = getenv("LIBGL_DRIVERS_PATH");
if (!libPaths)
libPaths = getenv("LIBGL_DRIVERS_DIR"); /* deprecated */
}
if (libPaths == NULL)
libPaths = DEFAULT_DRIVER_DIR;
handle = NULL;
for (p = libPaths; *p; p = next) {
next = strchr(p, ':');
if (next == NULL) {
len = strlen(p);
next = p + len;
}
else {
len = next - p;
next++;
}
#ifdef GLX_USE_TLS
snprintf(realDriverName, sizeof realDriverName,
"%.*s/tls/%s_dri.so", len, p, driverName);
InfoMessageF("OpenDriver: trying %s\n", realDriverName);
handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
#endif
if (handle == NULL) {
snprintf(realDriverName, sizeof realDriverName,
"%.*s/%s_dri.so", len, p, driverName);
InfoMessageF("OpenDriver: trying %s\n", realDriverName);
handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
}
if (handle != NULL)
break;
else
InfoMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
}
if (!handle)
ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);
if (glhandle)
dlclose(glhandle);
return handle;
}
/**
* Try to \c dlopen the named driver.
*
* This function adds the "_dri.so" suffix to the driver name and searches the
* directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
* order to find the driver.
*
* \param driverName - a name like "tdfx", "i810", "mga", etc.
*
* \returns
* A handle from \c dlopen, or \c NULL if driver file not found.
*/
static __DRIdriver *OpenDriver(const char *driverName)
{
char *libPaths = NULL;
char libDir[1000];
int i;
__DRIdriver *driver;
/* First, search Drivers list to see if we've already opened this driver */
for (driver = Drivers; driver; driver = driver->next) {
if (strcmp(driver->name, driverName) == 0) {
/* found it */
return driver;
}
}
if (geteuid() == getuid()) {
/* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
libPaths = getenv("LIBGL_DRIVERS_PATH");
if (!libPaths)
libPaths = getenv("LIBGL_DRIVERS_DIR"); /* deprecated */
}
if (!libPaths)
libPaths = DEFAULT_DRIVER_DIR;
for ( i = 0 ; ExtractDir(i, libPaths, 1000, libDir) != 0 ; i++ ) {
char realDriverName[200];
void *handle = NULL;
/* If TLS support is enabled, try to open the TLS version of the driver
* binary first. If that fails, try the non-TLS version.
*/
#ifdef GLX_USE_TLS
snprintf(realDriverName, 200, "%s/tls/%s_dri.so", libDir, driverName);
InfoMessageF("OpenDriver: trying %s\n", realDriverName);
handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
#endif
if ( handle == NULL ) {
snprintf(realDriverName, 200, "%s/%s_dri.so", libDir, driverName);
InfoMessageF("OpenDriver: trying %s\n", realDriverName);
handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
}
if ( handle != NULL ) {
/* allocate __DRIdriver struct */
driver = (__DRIdriver *) Xmalloc(sizeof(__DRIdriver));
if (!driver)
return NULL; /* out of memory! */
/* init the struct */
driver->name = __glXstrdup(driverName);
if (!driver->name) {
Xfree(driver);
return NULL; /* out of memory! */
}
driver->createNewScreenFunc = (PFNCREATENEWSCREENFUNC)
dlsym(handle, createNewScreenName);
if ( driver->createNewScreenFunc == NULL ) {
/* If the driver doesn't have this symbol then something's
* really, really wrong.
*/
ErrorMessageF("%s not defined in %s_dri.so!\n"
"Your driver may be too old for this libGL.\n",
createNewScreenName, driverName);
Xfree(driver);
dlclose(handle);
continue;
}
driver->handle = handle;
/* put at head of linked list */
driver->next = Drivers;
Drivers = driver;
return driver;
}
else {
ErrorMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
}
}
ErrorMessageF("unable to find driver: %s_dri.so\n", driverName);
return NULL;
}