xserver: Branch 'master'

[Keith Packard]

 glx/glxdricommon.c |   24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

New commits:
commit 7ecfab47eb221dbb996ea6c033348b8eceaeb893
Author: Eric Anholt <eric at anholt.net>
Date:   Tue Oct 22 14:22:04 2013 -0700

    glx: Add support for the new DRI loader entrypoint.
    
    This is going to be exposed (and not the old entrypoint) for some DRI
    drivers once the megadrivers series lands, and the plan is to
    eventually transition all drivers to that.  Hopefully this is
    unobtrusive enough to merge to stable X servers so that they can be
    compatible with new Mesa versions.
    
    v2: typo fix in the comment
    
    Signed-off-by: Eric Anholt <eric at anholt.net>
    Reviewed-by: Adam Jackson <ajax at redhat.com>
    Signed-off-by: Keith Packard <keithp at keithp.com>

diff --git a/glx/glxdricommon.c b/glx/glxdricommon.c
index b027f24..0ab3e30 100644
--- a/glx/glxdricommon.c
+++ b/glx/glxdricommon.c
@@ -211,6 +211,14 @@ glxConvertConfigs(const __DRIcoreExtension * core,
 
 static const char dri_driver_path[] = DRI_DRIVER_PATH;
 
+/* Temporary define to allow building without a dri_interface.h from
+ * updated Mesa.  Some day when we don't care about Mesa that old any
+ * more this can be removed.
+ */
+#ifndef __DRI_DRIVER_GET_EXTENSIONS
+#define __DRI_DRIVER_GET_EXTENSIONS "__driDriverGetExtensions"
+#endif
+
 void *
 glxProbeDriver(const char *driverName,
                void **coreExt, const char *coreName, int coreVersion,
@@ -219,7 +227,8 @@ glxProbeDriver(const char *driverName,
     int i;
     void *driver;
     char filename[PATH_MAX];
-    const __DRIextension **extensions;
+    char *get_extensions_name;
+    const __DRIextension **extensions = NULL;
 
     snprintf(filename, sizeof filename, "%s/%s_dri.so",
              dri_driver_path, driverName);
@@ -231,7 +240,18 @@ glxProbeDriver(const char *driverName,
         goto cleanup_failure;
     }
 
-    extensions = dlsym(driver, __DRI_DRIVER_EXTENSIONS);
+    if (asprintf(&get_extensions_name, "%s_%s",
+                 __DRI_DRIVER_GET_EXTENSIONS, driverName) != -1) {
+        const __DRIextension **(*get_extensions)(void);
+
+        get_extensions = dlsym(driver, get_extensions_name);
+        if (get_extensions)
+            extensions = get_extensions();
+        free(get_extensions_name);
+    }
+
+    if (!extensions)
+        extensions = dlsym(driver, __DRI_DRIVER_EXTENSIONS);
     if (extensions == NULL) {
         LogMessage(X_ERROR, "AIGLX error: %s exports no extensions (%s)\n",
                    driverName, dlerror());