5 files changed, 45 insertions, 1 deletions
diff --git a/src/gallium/include/state_tracker/st_api.h b/src/gallium/include/state_tracker/st_api.h
index 21f2d639b14..1e343d0e364 100644
--- a/src/gallium/include/state_tracker/st_api.h
+++ b/src/gallium/include/state_tracker/st_api.h
@@ -106,6 +106,13 @@ enum st_context_resource_type {
 };
 
 /**
+ * Value to st_manager->get_param function.
+ */
+enum st_manager_param {
+   ST_MANAGER_TEMP,
+};
+
+/**
  * The return type of st_api->get_proc_address.
  */
 typedef void (*st_proc_t)(void);
@@ -319,6 +326,12 @@ struct st_manager
     */
    boolean (*get_egl_image)(struct st_manager *smapi,
                             struct st_egl_image *stimg);
+
+   /**
+    * Query an manager param.
+    */
+   int (*get_param)(struct st_manager *smapi,
+                    enum st_manager_param param);
 };
 
 /**
diff --git a/src/gallium/state_trackers/dri/common/dri_screen.c b/src/gallium/state_trackers/dri/common/dri_screen.c
index 81523b82ba9..f5c936e1823 100644
--- a/src/gallium/state_trackers/dri/common/dri_screen.c
+++ b/src/gallium/state_trackers/dri/common/dri_screen.c
@@ -337,6 +337,13 @@ dri_get_egl_image(struct st_manager *smapi,
    return TRUE;
 }
 
+static int
+dri_get_param(struct st_manager *smapi,
+              enum st_manager_param param)
+{
+   return 0;
+}
+
 static void
 dri_destroy_option_cache(struct dri_screen * screen)
 {
@@ -391,6 +398,7 @@ dri_init_screen_helper(struct dri_screen *screen,
    }
 
    screen->base.get_egl_image = dri_get_egl_image;
+   screen->base.get_param = dri_get_param;
    screen->st_api = st_gl_api_create();
 
    if (!screen->st_api)
diff --git a/src/gallium/state_trackers/egl/common/egl_g3d_st.c b/src/gallium/state_trackers/egl/common/egl_g3d_st.c
index 1df57d07774..2d459d5a6c9 100644
--- a/src/gallium/state_trackers/egl/common/egl_g3d_st.c
+++ b/src/gallium/state_trackers/egl/common/egl_g3d_st.c
@@ -235,6 +235,13 @@ egl_g3d_st_manager_get_egl_image(struct st_manager *smapi,
    return TRUE;
 }
 
+static int
+egl_g3d_st_manager_get_param(struct st_manager *smapi,
+                             enum st_manager_param param)
+{
+   return 0;
+}
+
 struct st_manager *
 egl_g3d_create_st_manager(_EGLDisplay *dpy)
 {
@@ -247,6 +254,7 @@ egl_g3d_create_st_manager(_EGLDisplay *dpy)
 
       gsmapi->base.screen = gdpy->native->screen;
       gsmapi->base.get_egl_image = egl_g3d_st_manager_get_egl_image;
+      gsmapi->base.get_param = egl_g3d_st_manager_get_param;
    }
 
    return &gsmapi->base;;
diff --git a/src/gallium/state_trackers/glx/xlib/xm_api.c b/src/gallium/state_trackers/glx/xlib/xm_api.c
index a6f808bc964..ae9faeb424e 100644
--- a/src/gallium/state_trackers/glx/xlib/xm_api.c
+++ b/src/gallium/state_trackers/glx/xlib/xm_api.c
@@ -87,6 +87,12 @@ void xmesa_set_driver( const struct xm_driver *templ )
 static struct xmesa_display Displays[MAX_DISPLAYS];
 static int NumDisplays = 0;
 
+static int
+xmesa_get_param(struct st_manager *smapi,
+                enum st_manager_param *param)
+{
+   return 0;
+}
 
 static XMesaDisplay
 xmesa_init_display( Display *display )
@@ -116,8 +122,10 @@ xmesa_init_display( Display *display )
       xmdpy->display = display;
       xmdpy->screen = driver.create_pipe_screen(display);
       xmdpy->smapi = CALLOC_STRUCT(st_manager);
-      if (xmdpy->smapi)
+      if (xmdpy->smapi) {
          xmdpy->smapi->screen = xmdpy->screen;
+         xmdpy->smapi->get_param = xmesa_get_param;
+      }
 
       if (xmdpy->screen && xmdpy->smapi) {
          pipe_mutex_init(xmdpy->mutex);
diff --git a/src/gallium/state_trackers/wgl/stw_device.c b/src/gallium/state_trackers/wgl/stw_device.c
index 61b207525ca..a107c71bdab 100644
--- a/src/gallium/state_trackers/wgl/stw_device.c
+++ b/src/gallium/state_trackers/wgl/stw_device.c
@@ -48,6 +48,12 @@ extern _glthread_Mutex OneTimeLock;
 
 struct stw_device *stw_dev = NULL;
 
+static int
+stw_get_param(struct st_manager *smapi,
+              enum st_manager_param param)
+{
+   return 0;
+}
 
 boolean
 stw_init(const struct stw_winsys *stw_winsys)
@@ -87,6 +93,7 @@ stw_init(const struct stw_winsys *stw_winsys)
       stw_winsys->get_adapter_luid(screen, &stw_dev->AdapterLuid);
 
    stw_dev->smapi->screen = screen;
+   stw_dev->smapi->get_param = stw_get_param;
    stw_dev->screen = screen;
 
    pipe_mutex_init( stw_dev->ctx_mutex );