fl_display_monitor.cc File Reference

#include "flutter/shell/platform/linux/fl_display_monitor.h"
#include "flutter/shell/platform/linux/fl_engine_private.h"

Go to the source code of this file.

Classes
struct	_FlDisplayMonitor

Functions
static void	notify_display_update (FlDisplayMonitor *self)
static void	monitor_added_cb (FlDisplayMonitor *self, GdkMonitor *monitor)
static void	monitor_removed_cb (FlDisplayMonitor *self, GdkMonitor *monitor)
static void	fl_display_monitor_dispose (GObject *object)
static void	fl_display_monitor_class_init (FlDisplayMonitorClass *klass)
static void	fl_display_monitor_init (FlDisplayMonitor *self)
FlDisplayMonitor *	fl_display_monitor_new (FlEngine *engine, GdkDisplay *display)
void	fl_display_monitor_start (FlDisplayMonitor *self)
FlutterEngineDisplayId	fl_display_monitor_get_display_id (FlDisplayMonitor *self, GdkMonitor *monitor)

Function Documentation

fl_display_monitor_class_init()

static void fl_display_monitor_class_init ( FlDisplayMonitorClass *  klass )

static

Definition at line 83 of file fl_display_monitor.cc.

                                                                        {
  GObjectClass* object_class = G_OBJECT_CLASS(klass);
  object_class->dispose = fl_display_monitor_dispose;
}

References fl_display_monitor_dispose().

fl_display_monitor_dispose()

static void fl_display_monitor_dispose ( GObject *  object )

static

Definition at line 73 of file fl_display_monitor.cc.

                                                        {
  FlDisplayMonitor* self = FL_DISPLAY_MONITOR(object);
 
  g_weak_ref_clear(&self->engine);
  g_clear_object(&self->display);
  g_clear_pointer(&self->display_ids_by_monitor, g_hash_table_unref);
 
  G_OBJECT_CLASS(fl_display_monitor_parent_class)->dispose(object);
}

References self.

Referenced by fl_display_monitor_class_init().

fl_display_monitor_get_display_id()

FlutterEngineDisplayId fl_display_monitor_get_display_id	(	FlDisplayMonitor *	monitor,
		GdkMonitor *	gdk_monitor
	)

fl_display_monitor_get_display_id: @monitor: an #FlDisplayMonitor. @gdk_monitor: GDK monitor to get display ID for.

Get the ID Flutter is using for a given monitor.

Returns: an ID or 0 if unknown.

Definition at line 115 of file fl_display_monitor.cc.

                                                                              {
  g_return_val_if_fail(FL_IS_DISPLAY_MONITOR(self), 0);
  return GPOINTER_TO_INT(
      g_hash_table_lookup(self->display_ids_by_monitor, monitor));
}

References self.

Referenced by handle_geometry_changed().

fl_display_monitor_init()

static void fl_display_monitor_init ( FlDisplayMonitor *  self )

static

Definition at line 88 of file fl_display_monitor.cc.

                                                            {
  self->display_ids_by_monitor = g_hash_table_new_full(
      g_direct_hash, g_direct_equal, g_object_unref, nullptr);
  self->next_display_id = 1;
}

References self.

fl_display_monitor_new()

FlDisplayMonitor * fl_display_monitor_new	(	FlEngine *	engine,
		GdkDisplay *	display
	)

fl_display_monitor_new: @engine: engine to update. @display: display to monitor.

Creates a new object to keep the engine updated with the currently used displays. In GDK, a display is called a "monitor".

Returns: a new #FlDisplayMontior.

Definition at line 94 of file fl_display_monitor.cc.

                                                              {
  FlDisplayMonitor* self =
      FL_DISPLAY_MONITOR(g_object_new(fl_display_monitor_get_type(), nullptr));
  g_weak_ref_init(&self->engine, engine);
  self->display = GDK_DISPLAY(g_object_ref(display));
  return self;
}

References engine, and self.

Referenced by fl_engine_init(), and TEST().

fl_display_monitor_start()

void fl_display_monitor_start

(

FlDisplayMonitor *

monitor

)

fl_display_monitor_start: @monitor: an #FlDisplayMonitor.

Start monitoring for display changes.

Definition at line 103 of file fl_display_monitor.cc.

                                                      {
  g_return_if_fail(FL_IS_DISPLAY_MONITOR(self));
 
  g_signal_connect_object(self->display, "monitor-added",
                          G_CALLBACK(monitor_added_cb), self,
                          G_CONNECT_SWAPPED);
  g_signal_connect_object(self->display, "monitor-removed",
                          G_CALLBACK(monitor_removed_cb), self,
                          G_CONNECT_SWAPPED);
  notify_display_update(self);
}

References monitor_added_cb(), monitor_removed_cb(), notify_display_update(), and self.

Referenced by fl_engine_start(), and TEST().

monitor_added_cb()

static void monitor_added_cb ( FlDisplayMonitor *  self, GdkMonitor *  monitor  )

static

Definition at line 64 of file fl_display_monitor.cc.

                                                                          {
  notify_display_update(self);
}

References notify_display_update(), and self.

Referenced by fl_display_monitor_start().

monitor_removed_cb()

static void monitor_removed_cb ( FlDisplayMonitor *  self, GdkMonitor *  monitor  )

static

Definition at line 68 of file fl_display_monitor.cc.

                                                                            {
  g_hash_table_remove(self->display_ids_by_monitor, monitor);
  notify_display_update(self);
}

References notify_display_update(), and self.

Referenced by fl_display_monitor_start().

notify_display_update()

static void notify_display_update ( FlDisplayMonitor *  self )

static

Definition at line 27 of file fl_display_monitor.cc.

                                                          {
  g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
  if (engine == nullptr) {
    return;
  }
 
  int n_monitors = gdk_display_get_n_monitors(self->display);
  g_autofree FlutterEngineDisplay* displays =
      g_new0(FlutterEngineDisplay, n_monitors);
  for (int i = 0; i < n_monitors; i++) {
    FlutterEngineDisplay* display = &displays[i];
 
    GdkMonitor* monitor = gdk_display_get_monitor(self->display, i);
    FlutterEngineDisplayId display_id = GPOINTER_TO_INT(
        g_hash_table_lookup(self->display_ids_by_monitor, monitor));
    if (display_id == 0) {
      display_id = self->next_display_id;
      g_hash_table_insert(self->display_ids_by_monitor, g_object_ref(monitor),
                          GINT_TO_POINTER(display_id));
      self->next_display_id++;
    }
 
    GdkRectangle geometry;
    gdk_monitor_get_geometry(monitor, &geometry);
 
    display->struct_size = sizeof(FlutterEngineDisplay);
    display->display_id = display_id;
    display->single_display = false;
    display->refresh_rate = gdk_monitor_get_refresh_rate(monitor) / 1000.0;
    display->width = geometry.width;
    display->height = geometry.height;
    display->device_pixel_ratio = gdk_monitor_get_scale_factor(monitor);
  }
 
  fl_engine_notify_display_update(engine, displays, n_monitors);
}

References FlutterEngineDisplay::device_pixel_ratio, FlutterEngineDisplay::display_id, displays, engine, fl_engine_notify_display_update(), g_autoptr(), g_hash_table_insert(), gdk_display_get_monitor(), gdk_display_get_n_monitors(), gdk_monitor_get_geometry(), gdk_monitor_get_refresh_rate(), gdk_monitor_get_scale_factor(), FlutterEngineDisplay::height, i, FlutterEngineDisplay::refresh_rate, self, FlutterEngineDisplay::single_display, FlutterEngineDisplay::struct_size, and FlutterEngineDisplay::width.

Referenced by fl_display_monitor_start(), monitor_added_cb(), and monitor_removed_cb().