C++ CLUTTER_NOTE函数代码示例

static ClutterStageWindow *
clutter_backend_egl_create_stage (ClutterBackend  *backend,
                                  ClutterStage    *wrapper,
                                  GError         **error)
{
  ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
  ClutterStageX11 *stage_x11;
  ClutterStageWindow *stage;

  CLUTTER_NOTE (BACKEND, "Creating stage of type '%s'",
                g_type_name (CLUTTER_STAGE_TYPE));
  
  stage = g_object_new (CLUTTER_TYPE_STAGE_EGL, NULL);
  
  /* copy backend data into the stage */
  stage_x11 = CLUTTER_STAGE_X11 (stage);
  stage_x11->wrapper = wrapper;
  
  CLUTTER_NOTE (MISC, "EGLX stage created (display:%p, screen:%d, root:%u)",
                backend_x11->xdpy,
                backend_x11->xscreen_num,
                (unsigned int) backend_x11->xwin_root);
  
  return stage;
}

static ClutterFeatureFlags
clutter_backend_real_get_features (ClutterBackend *backend)
{
  ClutterFeatureFlags flags = 0;

  if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_MULTIPLE_ONSCREEN))
    {
      CLUTTER_NOTE (BACKEND, "Cogl supports multiple onscreen framebuffers");
      flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
    }
  else
    {
      CLUTTER_NOTE (BACKEND, "Cogl only supports one onscreen framebuffer");
      flags |= CLUTTER_FEATURE_STAGE_STATIC;
    }

  if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_THROTTLE))
    {
      CLUTTER_NOTE (BACKEND, "Cogl supports swap buffers throttling");
      flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
    }
  else
    CLUTTER_NOTE (BACKEND, "Cogl doesn't support swap buffers throttling");

  if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_BUFFERS_EVENT))
    {
      CLUTTER_NOTE (BACKEND, "Cogl supports swap buffers complete events");
      flags |= CLUTTER_FEATURE_SWAP_EVENTS;
    }

  return flags;
}

static void
wait_for_vblank (ClutterBackendGLX *backend_glx)
{
  if (backend_glx->vblank_type == CLUTTER_VBLANK_NONE)
    return;

  if (backend_glx->wait_video_sync)
    {
      unsigned int retraceCount;

      CLUTTER_NOTE (BACKEND, "Waiting for vblank (wait_video_sync)");
      backend_glx->get_video_sync (&retraceCount);
      backend_glx->wait_video_sync (2,
                                    (retraceCount + 1) % 2,
                                    &retraceCount);
    }
  else
    {
#ifdef HAVE_DRM
      drm_wait_vblank_t blank;

      CLUTTER_NOTE (BACKEND, "Waiting for vblank (drm)");
      blank.request.type     = _DRM_VBLANK_RELATIVE;
      blank.request.sequence = 1;
      blank.request.signal   = 0;
      drm_wait_vblank (backend_glx->dri_fd, &blank);
#else
      CLUTTER_NOTE (BACKEND, "No vblank mechanism found");
#endif /* HAVE_DRM */
    }
}

static void
set_foreign_window_callback (ClutterActor *actor,
                             void         *data)
{
  ForeignWindowData *fwd = data;

  CLUTTER_NOTE (BACKEND, "Setting foreign window (0x%x)",
                (guint) fwd->hwnd);

  if (fwd->destroy_old_hwnd && fwd->stage_win32->hwnd != NULL)
    {
      CLUTTER_NOTE (BACKEND, "Destroying previous window (0x%x)",
                    (guint) fwd->stage_win32->hwnd);
      DestroyWindow (fwd->stage_win32->hwnd);
    }

  fwd->stage_win32->hwnd = fwd->hwnd;
  fwd->stage_win32->is_foreign_win = TRUE;

  fwd->stage_win32->win_width = fwd->geom.width;
  fwd->stage_win32->win_height = fwd->geom.height;

  clutter_actor_set_size (actor, fwd->geom.width, fwd->geom.height);

  /* calling this with the stage unrealized will unset the stage
   * from the GL context; once the stage is realized the GL context
   * will be set again
   */
  clutter_stage_ensure_current (CLUTTER_STAGE (actor));
}

gboolean
_clutter_feature_init (GError **error)
{
  ClutterMainContext *context;

  CLUTTER_NOTE (MISC, "checking features");

  if (!__features)
    {
      CLUTTER_NOTE (MISC, "allocating features data");
      __features = g_new0 (ClutterFeatures, 1);
      __features->features_set = FALSE; /* don't rely on zero-ing */
    }

  if (__features->features_set)
    return TRUE;

  context = _clutter_context_get_default ();

  /* makes sure we have a GL context; if we have, this is a no-op */
  if (!_clutter_backend_create_context (context->backend, error))
    return FALSE;

  __features->flags = (clutter_features_from_cogl (cogl_get_features ())
                    | _clutter_backend_get_features (context->backend));

  __features->features_set = TRUE;

  CLUTTER_NOTE (MISC, "features checked");

  return TRUE;
}

static void
clutter_device_manager_win32_constructed (GObject *gobject)
{
  ClutterDeviceManager *manager = CLUTTER_DEVICE_MANAGER (gobject);
  ClutterDeviceManagerWin32 *manager_win32;
  ClutterInputDevice *device;

  device = g_object_new (CLUTTER_TYPE_INPUT_DEVICE,
                         "id", 0,
                         "name", "Core Pointer",
                         "device-type", CLUTTER_POINTER_DEVICE,
                         "device-mode", CLUTTER_INPUT_MODE_MASTER,
                         "has-cursor", TRUE,
                         "enabled", TRUE,
                         NULL);
  CLUTTER_NOTE (BACKEND, "Added core pointer device");
  _clutter_device_manager_add_device (manager, device);

  device = g_object_new (CLUTTER_TYPE_INPUT_DEVICE,
                         "id", 1,
                         "name", "Core Keyboard",
                         "device-type", CLUTTER_KEYBOARD_DEVICE,
                         "device-mode", CLUTTER_INPUT_MODE_MASTER,
                         "enabled", TRUE,
                         NULL);
  CLUTTER_NOTE (BACKEND, "Added core keyboard device");
  _clutter_device_manager_add_device (manager, device);

  manager_win32 = CLUTTER_DEVICE_MANAGER_WIN32 (manager);

  _clutter_input_device_set_associated_device (manager_win32->core_pointer,
                                               manager_win32->core_keyboard);
  _clutter_input_device_set_associated_device (manager_win32->core_keyboard,
                                               manager_win32->core_pointer);
}

ClutterFeatureFlags
clutter_backend_win32_get_features (ClutterBackend *backend)
{
  ClutterBackendClass *parent_class;
  ClutterFeatureFlags flags;

  parent_class = CLUTTER_BACKEND_CLASS (clutter_backend_win32_parent_class);

  flags = CLUTTER_FEATURE_STAGE_USER_RESIZE | CLUTTER_FEATURE_STAGE_CURSOR;

  if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_MULTIPLE_ONSCREEN))
    {
      CLUTTER_NOTE (BACKEND, "Cogl supports multiple onscreen framebuffers");
      flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
    }
  else
    {
      CLUTTER_NOTE (BACKEND, "Cogl only supports one onscreen framebuffer");
      flags |= CLUTTER_FEATURE_STAGE_STATIC;
    }

  if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_THROTTLE))
    {
      CLUTTER_NOTE (BACKEND, "Cogl supports swap buffers throttling");
      flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
    }
  else
    CLUTTER_NOTE (BACKEND, "Cogl doesn't support swap buffers throttling");

  CLUTTER_NOTE (BACKEND, "backend features checked");

  return flags;
}

static void
clutter_backend_win32_dispose (GObject *gobject)
{
  ClutterBackend *backend = CLUTTER_BACKEND (gobject);
  ClutterBackendWin32 *backend_win32 = CLUTTER_BACKEND_WIN32 (gobject);
  ClutterStageManager *stage_manager;

  CLUTTER_NOTE (BACKEND, "Disposing the of stages");
  stage_manager = clutter_stage_manager_get_default ();

  g_object_unref (stage_manager);

  CLUTTER_NOTE (BACKEND, "Removing the event source");
  _clutter_backend_win32_events_uninit (CLUTTER_BACKEND (backend_win32));

  /* Unrealize all shaders, since the GL context is going away */
  _clutter_shader_release_all ();

  G_OBJECT_CLASS (clutter_backend_win32_parent_class)->dispose (gobject);

  if (backend->cogl_context)
    {
      cogl_object_unref (backend->cogl_context);
      backend->cogl_context = NULL;
    }
}

static void
notify_cb (GObject          *object,
           GParamSpec       *param_spec,
           ClutterBehaviour *behave)
{
  ClutterBehaviourClass *klass;

  klass = CLUTTER_BEHAVIOUR_GET_CLASS (behave);

  CLUTTER_NOTE (BEHAVIOUR, "notify::alpha");

  /* no actors, we can stop right here */
  if (behave->priv->actors == NULL)
    return;

  if (klass->alpha_notify)
    {
      gdouble alpha_value = clutter_alpha_get_alpha (behave->priv->alpha);

      CLUTTER_NOTE (BEHAVIOUR, "calling %s::alpha_notify (%p, %.4f)",
                    g_type_name (G_TYPE_FROM_CLASS (klass)),
                    behave, alpha_value);

      klass->alpha_notify (behave, alpha_value);
    }
}

void
_clutter_feature_init (void)
{
  ClutterMainContext *context;

  CLUTTER_NOTE (MISC, "checking features");

  if (!__features)
    {
      CLUTTER_NOTE (MISC, "allocating features data");
      __features = g_new0 (ClutterFeatures, 1);
      __features->features_set = FALSE; /* don't rely on zero-ing */
    }

  if (__features->features_set)
    return;

  context = _clutter_context_get_default ();

  __features->flags = (_clutter_features_from_cogl (cogl_get_features ())
                    | _clutter_backend_get_features (context->backend));

  __features->features_set = TRUE;

  CLUTTER_NOTE (MISC, "features checked");
}

static ClutterStageWindow *
clutter_backend_glx_create_stage (ClutterBackend  *backend,
                                  ClutterStage    *wrapper,
                                  GError         **error)
{
  ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
  ClutterStageWindow *stage_window;
  ClutterStageX11 *stage_x11;

  CLUTTER_NOTE (BACKEND, "Creating stage of type '%s'",
                g_type_name (CLUTTER_STAGE_TYPE));

  stage_window = g_object_new (CLUTTER_TYPE_STAGE_GLX, NULL);

  /* copy backend data into the stage */
  stage_x11 = CLUTTER_STAGE_X11 (stage_window);
  stage_x11->wrapper = wrapper;

  CLUTTER_NOTE (BACKEND,
                "GLX stage created[%p] (dpy:%p, screen:%d, root:%u, wrap:%p)",
                stage_window,
                backend_x11->xdpy,
                backend_x11->xscreen_num,
                (unsigned int) backend_x11->xwin_root,
                wrapper);

  return stage_window;
}

static void
clutter_glx_texture_pixmap_update_area (ClutterX11TexturePixmap *texture,
                                        gint                     x,
                                        gint                     y,
                                        gint                     width,
                                        gint                     height)
{
  ClutterGLXTexturePixmapPrivate       *priv;
  Display                              *dpy;


  CLUTTER_NOTE (TEXTURE, "Updating texture pixmap");

  priv = CLUTTER_GLX_TEXTURE_PIXMAP (texture)->priv;
  dpy = clutter_x11_get_default_display();

  if (!CLUTTER_ACTOR_IS_REALIZED (texture))
    return;

  if (priv->use_fallback)
    {
      CLUTTER_NOTE (TEXTURE, "Falling back to X11");
      parent_class->update_area (texture,
                                 x, y,
                                 width, height);
      return;
    }

  if (priv->glx_pixmap == None)
    return;

  if (texture_bind (CLUTTER_GLX_TEXTURE_PIXMAP(texture)))
    {
      CLUTTER_NOTE (TEXTURE, "Really updating via GLX");

      clutter_x11_trap_x_errors ();

      (_gl_bind_tex_image) (dpy,
                            priv->glx_pixmap,
                            GLX_FRONT_LEFT_EXT,
                            NULL);

      XSync (clutter_x11_get_default_display(), FALSE);

      /* Note above fires X error for non name pixmaps - but
       * things still seem to work - i.e pixmap updated
       */
      if (clutter_x11_untrap_x_errors ())
        CLUTTER_NOTE (TEXTURE, "Update bind_tex_image failed");

      priv->bound = TRUE;
    }
  else
    g_warning ("Failed to bind initial tex");

  if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(texture)))
    clutter_actor_queue_redraw (CLUTTER_ACTOR(texture));

}

void
_clutter_backend_ensure_context (ClutterBackend *backend,
                                 ClutterStage   *stage)
{
  static ClutterStage *current_context_stage = NULL;
  ClutterBackendClass *klass;

  g_return_if_fail (CLUTTER_IS_BACKEND (backend));
  g_return_if_fail (CLUTTER_IS_STAGE (stage));

  if (current_context_stage != stage || !CLUTTER_ACTOR_IS_REALIZED (stage))
    {
      ClutterStage *new_stage = NULL;

      if (!CLUTTER_ACTOR_IS_REALIZED (stage))
        {
          new_stage = NULL;

          CLUTTER_NOTE (MULTISTAGE,
                        "Stage [%p] is not realized, unsetting the stage",
                        stage);
        }
      else
        {
          new_stage = stage;

          CLUTTER_NOTE (MULTISTAGE,
                        "Setting the new stage [%p]",
                        new_stage);
        }

      klass = CLUTTER_BACKEND_GET_CLASS (backend);
      if (G_LIKELY (klass->ensure_context))
        klass->ensure_context (backend, new_stage);
      
      /* FIXME: With a NULL stage and thus no active context it may make more
       * sense to clean the context but then re call with the default stage 
       * so at least there is some kind of context in place (as to avoid
       * potential issue of GL calls with no context)
       */
      current_context_stage = new_stage;

      /* if the new stage has a different size than the previous one
       * we need to update the viewport; we do it by simply setting the
       * SYNC_MATRICES flag and letting the next redraw cycle take care
       * of calling glViewport()
       */
      if (current_context_stage)
        {
          CLUTTER_SET_PRIVATE_FLAGS (current_context_stage,
                                     CLUTTER_ACTOR_SYNC_MATRICES);
        }
    }
  else
    CLUTTER_NOTE (MULTISTAGE, "Stage is the same");
}

static void
clutter_backend_x11_create_device_manager (ClutterBackendX11 *backend_x11)
{
  ClutterEventTranslator *translator;
  ClutterBackend *backend;

#ifdef HAVE_XINPUT_2
  if (clutter_enable_xinput)
    {
      int event_base, first_event, first_error;

      if (XQueryExtension (backend_x11->xdpy, "XInputExtension",
                           &event_base,
                           &first_event,
                           &first_error))
        {
          int major = 2;
          int minor = 3;

          if (XIQueryVersion (backend_x11->xdpy, &major, &minor) != BadRequest)
            {
              CLUTTER_NOTE (BACKEND, "Creating XI2 device manager");
              backend_x11->has_xinput = TRUE;
              backend_x11->device_manager =
                g_object_new (CLUTTER_TYPE_DEVICE_MANAGER_XI2,
                              "backend", backend_x11,
                              "opcode", event_base,
                              NULL);

              backend_x11->xi_minor = minor;
            }
        }
    }

  if (backend_x11->device_manager == NULL)
#endif /* HAVE_XINPUT_2 */
    {
      CLUTTER_NOTE (BACKEND, "Creating Core device manager");
      backend_x11->has_xinput = FALSE;
      backend_x11->device_manager =
        g_object_new (CLUTTER_TYPE_DEVICE_MANAGER_X11,
                      "backend", backend_x11,
                      NULL);

      backend_x11->xi_minor = -1;
    }

  backend = CLUTTER_BACKEND (backend_x11);
  backend->device_manager = backend_x11->device_manager;

  translator = CLUTTER_EVENT_TRANSLATOR (backend_x11->device_manager);
  _clutter_backend_add_event_translator (backend, translator);
}

static void
clutter_group_real_paint (ClutterActor *actor)
{
  ClutterGroupPrivate *priv = CLUTTER_GROUP (actor)->priv;

  CLUTTER_NOTE (PAINT, "ClutterGroup paint enter '%s'",
                _clutter_actor_get_debug_name (actor));

  g_list_foreach (priv->children, (GFunc) clutter_actor_paint, NULL);

  CLUTTER_NOTE (PAINT, "ClutterGroup paint leave '%s'",
                _clutter_actor_get_debug_name (actor));
}