ui/dbus: do not require opengl & gbm

Allow to build & use the DBus display without 3d/GPU acceleration support.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

ui/dbus.c

@@ -30,8 +30,10 @@
 #include "qom/object_interfaces.h"
 #include "sysemu/sysemu.h"
 #include "ui/dbus-module.h"
+#ifdef CONFIG_OPENGL
 #include "ui/egl-helpers.h"
 #include "ui/egl-context.h"
+#endif
 #include "audio/audio.h"
 #include "audio/audio_int.h"
 #include "qapi/error.h"
@@ -41,6 +43,7 @@
 
 static DBusDisplay *dbus_display;
 
+#ifdef CONFIG_OPENGL
 static QEMUGLContext dbus_create_context(DisplayGLCtx *dgc,
                                          QEMUGLParams *params)
 {
@@ -84,6 +87,7 @@ static const DisplayGLCtxOps dbus_gl_ops = {
     .dpy_gl_ctx_destroy_texture = dbus_destroy_texture,
     .dpy_gl_ctx_update_texture = dbus_update_texture,
 };
+#endif
 
 static NotifierList dbus_display_notifiers =
     NOTIFIER_LIST_INITIALIZER(dbus_display_notifiers);
@@ -112,10 +116,12 @@ dbus_display_init(Object *o)
     DBusDisplay *dd = DBUS_DISPLAY(o);
     g_autoptr(GDBusObjectSkeleton) vm = NULL;
 
+#ifdef CONFIG_OPENGL
     dd->glctx.ops = &dbus_gl_ops;
     if (display_opengl) {
         dd->glctx.gls = qemu_gl_init_shader();
     }
+#endif
     dd->iface = qemu_dbus_display1_vm_skeleton_new();
     dd->consoles = g_ptr_array_new_with_free_func(g_object_unref);
 
@@ -152,7 +158,9 @@ dbus_display_finalize(Object *o)
     g_clear_object(&dd->iface);
     g_free(dd->dbus_addr);
     g_free(dd->audiodev);
+#ifdef CONFIG_OPENGL
     g_clear_pointer(&dd->glctx.gls, qemu_gl_fini_shader);
+#endif
     dbus_display = NULL;
 }