st/eglwayland: Add support for EGL_DEFAULT_DISPLAY

src/gallium/state_trackers/egl/wayland/native_drm.c

@@ -98,6 +98,8 @@ wayland_drm_display_destroy(struct native_display *ndpy)
       FREE(drmdpy->device_name);
    if (drmdpy->base.config)
       FREE(drmdpy->base.config);
+   if (drmdpy->base.own_dpy)
+      wl_display_destroy(drmdpy->base.dpy);
 
    ndpy_uninit(ndpy);
 

src/gallium/state_trackers/egl/wayland/native_shm.c

@@ -65,6 +65,8 @@ wayland_shm_display_destroy(struct native_display *ndpy)
 
    if (shmdpy->base.config)
       FREE(shmdpy->base.config);
+   if (shmdpy->base.own_dpy)
+      wl_display_destroy(shmdpy->base.dpy);
 
    ndpy_uninit(ndpy);
 

src/gallium/state_trackers/egl/wayland/native_wayland.c

@@ -459,9 +459,17 @@ static struct native_display *
 native_create_display(void *dpy, boolean use_sw, void *user_data)
 {
    struct wayland_display *display = NULL;
+   boolean own_dpy = FALSE;
 
    use_sw = use_sw || debug_get_bool_option("EGL_SOFTWARE", FALSE);
 
+   if (dpy == NULL) {
+      dpy = wl_display_connect(NULL);
+      if (dpy == NULL)
+         return NULL;
+      own_dpy = TRUE;
+   }
+
    if (use_sw) {
       _eglLog(_EGL_INFO, "use software fallback");
       display = wayland_create_shm_display((struct wl_display *) dpy,
@@ -482,6 +490,8 @@ native_create_display(void *dpy, boolean use_sw, void *user_data)
    display->base.create_window_surface = wayland_create_window_surface;
    display->base.create_pixmap_surface = wayland_create_pixmap_surface;
 
+   display->own_dpy = own_dpy;
+
    return &display->base;
 }
 

src/gallium/state_trackers/egl/wayland/native_wayland.h

@@ -41,6 +41,7 @@ struct wayland_display {
 
    struct wayland_config *config;
    struct wl_display *dpy;
+   boolean own_dpy;
 
    struct wl_buffer *(*create_buffer)(struct wayland_display *display,
                                       struct wayland_surface *surface,