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381de44c5d
mutter/src/compositor/meta-window-actor.c
Georges Basile Stavracas Neto 381de44c5d window-actor: Use logical monitor scale on cursor scale 
When using 'scale-monitor-framebuffer', it's important to use the
monitor's scale on top of the cursor texture scale. This matches
what the monitor screencast source does.

Closes https://gitlab.gnome.org/GNOME/mutter/-/issues/1541

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2737>
2022-12-03 15:22:31 -03:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/**
* SECTION:meta-window-actor
* @title: MetaWindowActor
* @short_description: An actor representing a top-level window in the scene
* graph
*
* #MetaWindowActor is a #ClutterActor that adds a notion of a window to the
* Clutter scene graph. It contains a #MetaWindow which provides the windowing
* API, and the #MetaCompositor that handles it. For the actual content of the
* window, it contains a #MetaSurfaceActor.
*
* #MetaWindowActor takes care of the rendering features you need for your
* window. For example, it will take the windows' requested opacity and use
* that for clutter_actor_set_opacity(). Furthermore, it will also draw a
* shadow around the window (using #MetaShadow) and deal with synchronization
* between events of the window and the actual render loop. See
* MetaWindowActor::first-frame for an example of the latter.
*/
#include "config.h"
#include <gdk/gdk.h>
#include <math.h>
#include <string.h>
#include "backends/meta-screen-cast-window.h"
#include "compositor/compositor-private.h"
#include "compositor/meta-shaped-texture-private.h"
#include "compositor/meta-surface-actor-x11.h"
#include "compositor/meta-surface-actor.h"
#include "compositor/meta-window-actor-private.h"
#include "core/boxes-private.h"
#include "core/window-private.h"
#include "meta/window.h"
#ifdef HAVE_WAYLAND
#include "compositor/meta-surface-actor-wayland.h"
#include "wayland/meta-wayland-surface.h"
#endif
typedef enum
{
INITIALLY_FROZEN,
DRAWING_FIRST_FRAME,
EMITTED_FIRST_FRAME
} FirstFrameState;
typedef struct _MetaWindowActorPrivate
{
MetaWindow *window;
MetaCompositor *compositor;
gulong stage_views_changed_id;
MetaSurfaceActor *surface;
int geometry_scale;
/*
* These need to be counters rather than flags, since more plugins
* can implement same effect; the practicality of stacking effects
* might be dubious, but we have to at least handle it correctly.
*/
gint minimize_in_progress;
gint unminimize_in_progress;
gint size_change_in_progress;
gint map_in_progress;
gint destroy_in_progress;
guint freeze_count;
guint visible : 1;
guint disposed : 1;
guint needs_destroy : 1;
guint updates_frozen : 1;
guint first_frame_state : 2; /* FirstFrameState */
} MetaWindowActorPrivate;
enum
{
FIRST_FRAME,
EFFECTS_COMPLETED,
DAMAGED,
THAWED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
enum
{
PROP_META_WINDOW = 1,
};
static void meta_window_actor_dispose (GObject *object);
static void meta_window_actor_constructed (GObject *object);
static void meta_window_actor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void meta_window_actor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static MetaSurfaceActor * meta_window_actor_real_get_scanout_candidate (MetaWindowActor *self);
static void meta_window_actor_real_assign_surface_actor (MetaWindowActor *self,
MetaSurfaceActor *surface_actor);
static void screen_cast_window_iface_init (MetaScreenCastWindowInterface *iface);
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (MetaWindowActor, meta_window_actor, CLUTTER_TYPE_ACTOR,
G_ADD_PRIVATE (MetaWindowActor)
G_IMPLEMENT_INTERFACE (META_TYPE_SCREEN_CAST_WINDOW, screen_cast_window_iface_init));
static void
meta_window_actor_class_init (MetaWindowActorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GParamSpec *pspec;
object_class->dispose = meta_window_actor_dispose;
object_class->set_property = meta_window_actor_set_property;
object_class->get_property = meta_window_actor_get_property;
object_class->constructed = meta_window_actor_constructed;
klass->get_scanout_candidate = meta_window_actor_real_get_scanout_candidate;
klass->assign_surface_actor = meta_window_actor_real_assign_surface_actor;
/**
* MetaWindowActor::first-frame:
* @actor: the #MetaWindowActor instance
*
* The ::first-frame signal will be emitted the first time a frame
* of window contents has been drawn by the application and Mutter
* has had the chance to drawn that frame to the screen. If the
* window starts off initially hidden, obscured, or on on a
* different workspace, the ::first-frame signal will be emitted
* even though the user doesn't see the contents.
*
* MetaDisplay::window-created is a good place to connect to this
* signal - at that point, the MetaWindowActor for the window
* exists, but the window has reliably not yet been drawn.
* Connecting to an existing window that has already been drawn to
* the screen is not useful.
*/
signals[FIRST_FRAME] =
g_signal_new ("first-frame",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
/**
* MetaWindowActor::effects-completed:
* @actor: the #MetaWindowActor instance
*
* The ::effects-completed signal will be emitted once all pending compositor
* effects are completed.
*/
signals[EFFECTS_COMPLETED] =
g_signal_new ("effects-completed",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
/**
* MetaWindowActor::damaged:
* @actor: the #MetaWindowActor instance
*
* Notify that one or more of the surfaces of the window have been damaged.
*/
signals[DAMAGED] =
g_signal_new ("damaged",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
/**
* MetaWindowActor::thawed:
* @actor: the #MetaWindowActor instance
*/
signals[THAWED] =
g_signal_new ("thawed",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pspec = g_param_spec_object ("meta-window",
"MetaWindow",
"The displayed MetaWindow",
META_TYPE_WINDOW,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_property (object_class,
PROP_META_WINDOW,
pspec);
}
static void
meta_window_actor_init (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
priv->geometry_scale = 1;
}
static void
window_appears_focused_notify (MetaWindow *mw,
GParamSpec *arg1,
gpointer data)
{
clutter_actor_queue_redraw (CLUTTER_ACTOR (data));
}
gboolean
meta_window_actor_is_opaque (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaWindow *window = priv->window;
if (window->opacity != 0xff)
return FALSE;
if (!priv->surface)
return FALSE;
return meta_surface_actor_is_opaque (priv->surface);
}
gboolean
meta_window_actor_is_frozen (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
return priv->surface == NULL || priv->freeze_count > 0;
}
void
meta_window_actor_update_regions (MetaWindowActor *self)
{
META_WINDOW_ACTOR_GET_CLASS (self)->update_regions (self);
}
gboolean
meta_window_actor_can_freeze_commits (MetaWindowActor *self)
{
g_return_val_if_fail (META_IS_WINDOW_ACTOR (self), FALSE);
return META_WINDOW_ACTOR_GET_CLASS (self)->can_freeze_commits (self);
}
static void
meta_window_actor_set_frozen (MetaWindowActor *self,
gboolean frozen)
{
META_WINDOW_ACTOR_GET_CLASS (self)->set_frozen (self, frozen);
}
/**
* meta_window_actor_freeze:
* @self: The #MetaWindowActor
*
* Freezes the #MetaWindowActor, which inhibits updates and geometry
* changes of the window. This property is refcounted, so make sure
* to call meta_window_actor_thaw() the exact same amount of times
* as this function to allow updates again.
*/
void
meta_window_actor_freeze (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv;
g_return_if_fail (META_IS_WINDOW_ACTOR (self));
priv = meta_window_actor_get_instance_private (self);
if (priv->freeze_count == 0 && priv->surface)
meta_window_actor_set_frozen (self, TRUE);
priv->freeze_count ++;
}
static void
meta_window_actor_sync_thawed_state (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
if (priv->first_frame_state == INITIALLY_FROZEN)
priv->first_frame_state = DRAWING_FIRST_FRAME;
if (priv->surface)
meta_window_actor_set_frozen (self, FALSE);
/* We sometimes ignore moves and resizes on frozen windows */
meta_window_actor_sync_actor_geometry (self, FALSE);
}
/**
* meta_window_actor_thaw:
* @self: The #MetaWindowActor
*
* Thaws/unfreezes the #MetaWindowActor to allow updates and geometry
* changes after a window was frozen using meta_window_actor_freeze().
*/
void
meta_window_actor_thaw (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv;
g_return_if_fail (META_IS_WINDOW_ACTOR (self));
priv = meta_window_actor_get_instance_private (self);
if (priv->freeze_count <= 0)
g_error ("Error in freeze/thaw accounting");
priv->freeze_count--;
if (priv->freeze_count > 0)
return;
/* We still might be frozen due to lack of a MetaSurfaceActor */
if (meta_window_actor_is_frozen (self))
return;
meta_window_actor_sync_thawed_state (self);
g_signal_emit (self, signals[THAWED], 0);
}
static void
meta_window_actor_real_assign_surface_actor (MetaWindowActor *self,
MetaSurfaceActor *surface_actor)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
g_clear_object (&priv->surface);
priv->surface = g_object_ref_sink (surface_actor);
if (meta_window_actor_is_frozen (self))
meta_window_actor_set_frozen (self, TRUE);
else
meta_window_actor_sync_thawed_state (self);
}
void
meta_window_actor_assign_surface_actor (MetaWindowActor *self,
MetaSurfaceActor *surface_actor)
{
META_WINDOW_ACTOR_GET_CLASS (self)->assign_surface_actor (self,
surface_actor);
}
static void
init_surface_actor (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaWindow *window = priv->window;
MetaSurfaceActor *surface_actor = NULL;
if (!meta_is_wayland_compositor ())
{
surface_actor = meta_surface_actor_x11_new (window);
}
#ifdef HAVE_WAYLAND
else
{
MetaWaylandSurface *surface = meta_window_get_wayland_surface (window);
surface_actor = surface ? meta_wayland_surface_get_actor (surface) : NULL;
}
#endif
if (surface_actor)
meta_window_actor_assign_surface_actor (self, surface_actor);
}
static void
on_stage_views_changed (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
meta_compositor_window_actor_stage_views_changed (priv->compositor);
}
static void
meta_window_actor_constructed (GObject *object)
{
MetaWindowActor *self = META_WINDOW_ACTOR (object);
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaWindow *window = priv->window;
priv->compositor = window->display->compositor;
priv->stage_views_changed_id =
g_signal_connect (self,
"stage-views-changed",
G_CALLBACK (on_stage_views_changed),
NULL);
/* Hang our compositor window state off the MetaWindow for fast retrieval */
meta_window_set_compositor_private (window, object);
init_surface_actor (self);
meta_window_actor_update_opacity (self);
meta_window_actor_sync_updates_frozen (self);
if (meta_window_actor_is_frozen (self))
priv->first_frame_state = INITIALLY_FROZEN;
else
priv->first_frame_state = DRAWING_FIRST_FRAME;
meta_window_actor_sync_actor_geometry (self, priv->window->placed);
}
static void
meta_window_actor_dispose (GObject *object)
{
MetaWindowActor *self = META_WINDOW_ACTOR (object);
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaCompositor *compositor = priv->compositor;
if (priv->disposed)
{
G_OBJECT_CLASS (meta_window_actor_parent_class)->dispose (object);
return;
}
priv->disposed = TRUE;
g_clear_signal_handler (&priv->stage_views_changed_id, self);
meta_compositor_remove_window_actor (compositor, self);
g_clear_object (&priv->window);
g_clear_object (&priv->surface);
G_OBJECT_CLASS (meta_window_actor_parent_class)->dispose (object);
}
static void
meta_window_actor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MetaWindowActor *self = META_WINDOW_ACTOR (object);
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
switch (prop_id)
{
case PROP_META_WINDOW:
priv->window = g_value_dup_object (value);
g_signal_connect_object (priv->window, "notify::appears-focused",
G_CALLBACK (window_appears_focused_notify), self, 0);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_window_actor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MetaWindowActor *self = META_WINDOW_ACTOR (object);
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
switch (prop_id)
{
case PROP_META_WINDOW:
g_value_set_object (value, priv->window);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* meta_window_actor_get_meta_window:
* @self: a #MetaWindowActor
*
* Gets the #MetaWindow object that the the #MetaWindowActor is displaying
*
* Return value: (transfer none) (nullable): the displayed #MetaWindow
*/
MetaWindow *
meta_window_actor_get_meta_window (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
return priv->window;
}
/**
* meta_window_actor_get_texture:
* @self: a #MetaWindowActor
*
* Gets the ClutterActor that is used to display the contents of the window,
* or NULL if no texture is shown yet, because the window is not mapped.
*
* Return value: (transfer none) (nullable): the #ClutterActor for the contents
*/
MetaShapedTexture *
meta_window_actor_get_texture (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
if (priv->surface)
return meta_surface_actor_get_texture (priv->surface);
else
return NULL;
}
/**
* meta_window_actor_get_surface:
* @self: a #MetaWindowActor
*
* Gets the MetaSurfaceActor that draws the content of this window,
* or NULL if there is no surface yet associated with this window.
*
* Return value: (transfer none) (nullable): the #MetaSurfaceActor for the
* contents
*/
MetaSurfaceActor *
meta_window_actor_get_surface (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
return priv->surface;
}
static MetaSurfaceActor *
meta_window_actor_real_get_scanout_candidate (MetaWindowActor *self)
{
return NULL;
}
MetaSurfaceActor *
meta_window_actor_get_scanout_candidate (MetaWindowActor *self)
{
return META_WINDOW_ACTOR_GET_CLASS (self)->get_scanout_candidate (self);
}
/**
* meta_window_actor_is_destroyed:
* @self: a #MetaWindowActor
*
* Gets whether the X window that the actor was displaying has been destroyed
*
* Return value: %TRUE when the window is destroyed, otherwise %FALSE
*/
gboolean
meta_window_actor_is_destroyed (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
return priv->disposed || priv->needs_destroy;
}
void
meta_window_actor_queue_frame_drawn (MetaWindowActor *self,
gboolean no_delay_frame)
{
META_WINDOW_ACTOR_GET_CLASS (self)->queue_frame_drawn (self,
no_delay_frame);
}
gboolean
meta_window_actor_effect_in_progress (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
return (priv->minimize_in_progress ||
priv->size_change_in_progress ||
priv->map_in_progress ||
priv->destroy_in_progress);
}
static gboolean
is_freeze_thaw_effect (MetaPluginEffect event)
{
switch (event)
{
case META_PLUGIN_DESTROY:
return TRUE;
break;
default:
return FALSE;
}
}
static gboolean
start_simple_effect (MetaWindowActor *self,
MetaPluginEffect event)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaCompositor *compositor = priv->compositor;
MetaPluginManager *plugin_mgr =
meta_compositor_get_plugin_manager (compositor);
gint *counter = NULL;
gboolean use_freeze_thaw = FALSE;
g_assert (plugin_mgr != NULL);
switch (event)
{
case META_PLUGIN_NONE:
return FALSE;
case META_PLUGIN_MINIMIZE:
counter = &priv->minimize_in_progress;
break;
case META_PLUGIN_UNMINIMIZE:
counter = &priv->unminimize_in_progress;
break;
case META_PLUGIN_MAP:
counter = &priv->map_in_progress;
break;
case META_PLUGIN_DESTROY:
counter = &priv->destroy_in_progress;
break;
case META_PLUGIN_SIZE_CHANGE:
case META_PLUGIN_SWITCH_WORKSPACE:
g_assert_not_reached ();
break;
}
g_assert (counter);
use_freeze_thaw = is_freeze_thaw_effect (event);
if (use_freeze_thaw)
meta_window_actor_freeze (self);
(*counter)++;
if (!meta_plugin_manager_event_simple (plugin_mgr, self, event))
{
(*counter)--;
if (use_freeze_thaw)
meta_window_actor_thaw (self);
return FALSE;
}
return TRUE;
}
static void
meta_window_actor_after_effects (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
ClutterStage *stage;
ClutterSeat *seat;
stage = CLUTTER_STAGE (clutter_actor_get_stage (CLUTTER_ACTOR (self)));
seat = clutter_backend_get_default_seat (clutter_get_default_backend ());
if (priv->needs_destroy)
{
clutter_actor_destroy (CLUTTER_ACTOR (self));
}
else
{
g_signal_emit (self, signals[EFFECTS_COMPLETED], 0);
meta_window_actor_sync_visibility (self);
meta_window_actor_sync_actor_geometry (self, FALSE);
}
clutter_stage_repick_device (stage, clutter_seat_get_pointer (seat));
}
void
meta_window_actor_effect_completed (MetaWindowActor *self,
MetaPluginEffect event)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
gboolean inconsistent = FALSE;
/* NB: Keep in mind that when effects get completed it possible
* that the corresponding MetaWindow may have be been destroyed.
* In this case priv->window will == NULL */
switch (event)
{
case META_PLUGIN_NONE:
break;
case META_PLUGIN_MINIMIZE:
{
priv->minimize_in_progress--;
if (priv->minimize_in_progress < 0)
{
g_warning ("Error in minimize accounting.");
priv->minimize_in_progress = 0;
inconsistent = TRUE;
}
}
break;
case META_PLUGIN_UNMINIMIZE:
{
priv->unminimize_in_progress--;
if (priv->unminimize_in_progress < 0)
{
g_warning ("Error in unminimize accounting.");
priv->unminimize_in_progress = 0;
inconsistent = TRUE;
}
}
break;
case META_PLUGIN_MAP:
/*
* Make sure that the actor is at the correct place in case
* the plugin fscked.
*/
priv->map_in_progress--;
if (priv->map_in_progress < 0)
{
g_warning ("Error in map accounting.");
priv->map_in_progress = 0;
inconsistent = TRUE;
}
break;
case META_PLUGIN_DESTROY:
priv->destroy_in_progress--;
if (priv->destroy_in_progress < 0)
{
g_warning ("Error in destroy accounting.");
priv->destroy_in_progress = 0;
inconsistent = TRUE;
}
break;
case META_PLUGIN_SIZE_CHANGE:
priv->size_change_in_progress--;
if (priv->size_change_in_progress < 0)
{
g_warning ("Error in size change accounting.");
priv->size_change_in_progress = 0;
inconsistent = TRUE;
}
break;
case META_PLUGIN_SWITCH_WORKSPACE:
g_assert_not_reached ();
break;
}
if (is_freeze_thaw_effect (event) && !inconsistent)
meta_window_actor_thaw (self);
if (!meta_window_actor_effect_in_progress (self))
meta_window_actor_after_effects (self);
}
void
meta_window_actor_queue_destroy (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaWindow *window = priv->window;
MetaWindowType window_type = meta_window_get_window_type (window);
meta_window_set_compositor_private (window, NULL);
META_WINDOW_ACTOR_GET_CLASS (self)->queue_destroy (self);
if (window_type == META_WINDOW_DROPDOWN_MENU ||
window_type == META_WINDOW_POPUP_MENU ||
window_type == META_WINDOW_TOOLTIP ||
window_type == META_WINDOW_NOTIFICATION ||
window_type == META_WINDOW_COMBO ||
window_type == META_WINDOW_DND ||
window_type == META_WINDOW_OVERRIDE_OTHER)
{
/*
* No effects, just kill it.
*/
clutter_actor_destroy (CLUTTER_ACTOR (self));
return;
}
priv->needs_destroy = TRUE;
if (!meta_window_actor_effect_in_progress (self))
clutter_actor_destroy (CLUTTER_ACTOR (self));
}
MetaWindowActorChanges
meta_window_actor_sync_actor_geometry (MetaWindowActor *self,
gboolean did_placement)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaRectangle actor_rect;
ClutterActor *actor = CLUTTER_ACTOR (self);
MetaWindowActorChanges changes = 0;
meta_window_get_buffer_rect (priv->window, &actor_rect);
/* When running as a Wayland compositor we catch size changes when new
* buffers are attached */
if (META_IS_SURFACE_ACTOR_X11 (priv->surface))
meta_surface_actor_x11_set_size (META_SURFACE_ACTOR_X11 (priv->surface),
actor_rect.width, actor_rect.height);
/* Normally we want freezing a window to also freeze its position; this allows
* windows to atomically move and resize together, either under app control,
* or because the user is resizing from the left/top. But on initial placement
* we need to assign a position, since immediately after the window
* is shown, the map effect will go into effect and prevent further geometry
* updates.
*/
if (meta_window_actor_is_frozen (self) && !did_placement)
return META_WINDOW_ACTOR_CHANGE_POSITION | META_WINDOW_ACTOR_CHANGE_SIZE;
META_WINDOW_ACTOR_GET_CLASS (self)->sync_geometry (self, &actor_rect);
if (clutter_actor_has_allocation (actor))
{
ClutterActorBox box;
float old_x, old_y;
float old_width, old_height;
clutter_actor_get_allocation_box (actor, &box);
old_x = box.x1;
old_y = box.y1;
old_width = box.x2 - box.x1;
old_height = box.y2 - box.y1;
if (old_x != actor_rect.x || old_y != actor_rect.y)
changes |= META_WINDOW_ACTOR_CHANGE_POSITION;
if (old_width != actor_rect.width || old_height != actor_rect.height)
changes |= META_WINDOW_ACTOR_CHANGE_SIZE;
}
else
{
changes = META_WINDOW_ACTOR_CHANGE_POSITION | META_WINDOW_ACTOR_CHANGE_SIZE;
}
if (changes & META_WINDOW_ACTOR_CHANGE_POSITION)
clutter_actor_set_position (actor, actor_rect.x, actor_rect.y);
if (changes & META_WINDOW_ACTOR_CHANGE_SIZE)
clutter_actor_set_size (actor, actor_rect.width, actor_rect.height);
return changes;
}
void
meta_window_actor_show (MetaWindowActor *self,
MetaCompEffect effect)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaCompositor *compositor = priv->compositor;
MetaPluginEffect event;
g_return_if_fail (!priv->visible);
priv->visible = TRUE;
switch (effect)
{
case META_COMP_EFFECT_CREATE:
event = META_PLUGIN_MAP;
break;
case META_COMP_EFFECT_UNMINIMIZE:
event = META_PLUGIN_UNMINIMIZE;
break;
case META_COMP_EFFECT_NONE:
event = META_PLUGIN_NONE;
break;
default:
g_assert_not_reached();
}
if (event == META_PLUGIN_MAP)
meta_window_actor_sync_actor_geometry (self, TRUE);
if (meta_compositor_is_switching_workspace (compositor) ||
!start_simple_effect (self, event))
{
clutter_actor_show (CLUTTER_ACTOR (self));
}
}
void
meta_window_actor_hide (MetaWindowActor *self,
MetaCompEffect effect)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaCompositor *compositor = priv->compositor;
MetaPluginEffect event;
g_return_if_fail (priv->visible);
priv->visible = FALSE;
/* If a plugin is animating a workspace transition, we have to
* hold off on hiding the window, and do it after the workspace
* switch completes
*/
if (meta_compositor_is_switching_workspace (compositor))
return;
switch (effect)
{
case META_COMP_EFFECT_DESTROY:
event = META_PLUGIN_DESTROY;
break;
case META_COMP_EFFECT_MINIMIZE:
event = META_PLUGIN_MINIMIZE;
break;
case META_COMP_EFFECT_NONE:
event = META_PLUGIN_NONE;
break;
default:
g_assert_not_reached();
}
if (!start_simple_effect (self, event))
clutter_actor_hide (CLUTTER_ACTOR (self));
}
void
meta_window_actor_size_change (MetaWindowActor *self,
MetaSizeChange which_change,
MetaRectangle *old_frame_rect,
MetaRectangle *old_buffer_rect)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaCompositor *compositor = priv->compositor;
MetaPluginManager *plugin_mgr =
meta_compositor_get_plugin_manager (compositor);
priv->size_change_in_progress++;
if (!meta_plugin_manager_event_size_change (plugin_mgr, self,
which_change, old_frame_rect, old_buffer_rect))
priv->size_change_in_progress--;
}
#if 0
/* Print out a region; useful for debugging */
static void
print_region (cairo_region_t *region)
{
int n_rects;
int i;
n_rects = cairo_region_num_rectangles (region);
g_print ("[");
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (region, i, &rect);
g_print ("+%d+%dx%dx%d ",
rect.x, rect.y, rect.width, rect.height);
}
g_print ("]\n");
}
#endif
#if 0
/* Dump a region to a PNG file; useful for debugging */
static void
see_region (cairo_region_t *region,
int width,
int height,
char *filename)
{
cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_A8, width, height);
cairo_t *cr = cairo_create (surface);
gdk_cairo_region (cr, region);
cairo_fill (cr);
cairo_surface_write_to_png (surface, filename);
cairo_destroy (cr);
cairo_surface_destroy (surface);
}
#endif
void
meta_window_actor_sync_visibility (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
if (CLUTTER_ACTOR_IS_VISIBLE (self) != priv->visible)
{
if (priv->visible)
clutter_actor_show (CLUTTER_ACTOR (self));
else
clutter_actor_hide (CLUTTER_ACTOR (self));
}
}
void
meta_window_actor_before_paint (MetaWindowActor *self,
ClutterStageView *stage_view)
{
if (meta_window_actor_is_destroyed (self))
return;
META_WINDOW_ACTOR_GET_CLASS (self)->before_paint (self, stage_view);
}
void
meta_window_actor_after_paint (MetaWindowActor *self,
ClutterStageView *stage_view)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
META_WINDOW_ACTOR_GET_CLASS (self)->after_paint (self, stage_view);
if (meta_window_actor_is_destroyed (self))
return;
if (priv->first_frame_state == DRAWING_FIRST_FRAME)
{
priv->first_frame_state = EMITTED_FIRST_FRAME;
g_signal_emit (self, signals[FIRST_FRAME], 0);
}
}
void
meta_window_actor_frame_complete (MetaWindowActor *self,
ClutterFrameInfo *frame_info,
gint64 presentation_time)
{
META_WINDOW_ACTOR_GET_CLASS (self)->frame_complete (self,
frame_info,
presentation_time);
}
void
meta_window_actor_update_opacity (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaWindow *window = priv->window;
if (priv->surface)
clutter_actor_set_opacity (CLUTTER_ACTOR (priv->surface), window->opacity);
}
static void
meta_window_actor_set_updates_frozen (MetaWindowActor *self,
gboolean updates_frozen)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
updates_frozen = updates_frozen != FALSE;
if (priv->updates_frozen != updates_frozen)
{
priv->updates_frozen = updates_frozen;
if (updates_frozen)
meta_window_actor_freeze (self);
else
meta_window_actor_thaw (self);
}
}
void
meta_window_actor_sync_updates_frozen (MetaWindowActor *self)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaWindow *window = priv->window;
meta_window_actor_set_updates_frozen (self, meta_window_updates_are_frozen (window));
}
MetaWindowActor *
meta_window_actor_from_window (MetaWindow *window)
{
return META_WINDOW_ACTOR (meta_window_get_compositor_private (window));
}
void
meta_window_actor_set_geometry_scale (MetaWindowActor *window_actor,
int geometry_scale)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (window_actor);
graphene_matrix_t child_transform;
if (priv->geometry_scale == geometry_scale)
return;
priv->geometry_scale = geometry_scale;
graphene_matrix_init_scale (&child_transform,
geometry_scale,
geometry_scale,
1);
clutter_actor_set_child_transform (CLUTTER_ACTOR (window_actor),
&child_transform);
}
int
meta_window_actor_get_geometry_scale (MetaWindowActor *window_actor)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (window_actor);
return priv->geometry_scale;
}
static void
meta_window_actor_get_buffer_bounds (MetaScreenCastWindow *screen_cast_window,
MetaRectangle *bounds)
{
MetaWindowActor *window_actor = META_WINDOW_ACTOR (screen_cast_window);
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (window_actor);
MetaShapedTexture *stex;
int buffer_scale;
stex = meta_surface_actor_get_texture (priv->surface);
buffer_scale = meta_shaped_texture_get_buffer_scale (stex);
*bounds = (MetaRectangle) {
.width = meta_shaped_texture_get_width (stex) * buffer_scale,
.height = meta_shaped_texture_get_height (stex) * buffer_scale,
};
}
static void
meta_window_actor_transform_relative_position (MetaScreenCastWindow *screen_cast_window,
double x,
double y,
double *x_out,
double *y_out)
{
MetaWindowActor *window_actor = META_WINDOW_ACTOR (screen_cast_window);
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (window_actor);
MetaRectangle bounds;
graphene_point3d_t v1 = { 0.f, }, v2 = { 0.f, };
meta_window_actor_get_buffer_bounds (screen_cast_window, &bounds);
v1.x = CLAMP ((float) x,
bounds.x,
bounds.x + bounds.width);
v1.y = CLAMP ((float) y,
bounds.y,
bounds.y + bounds.height);
clutter_actor_apply_transform_to_point (CLUTTER_ACTOR (priv->surface),
&v1,
&v2);
*x_out = (double) v2.x;
*y_out = (double) v2.y;
}
static gboolean
meta_window_actor_transform_cursor_position (MetaScreenCastWindow *screen_cast_window,
MetaCursorSprite *cursor_sprite,
graphene_point_t *cursor_position,
float *out_cursor_scale,
MetaMonitorTransform *out_cursor_transform,
graphene_point_t *out_relative_cursor_position)
{
MetaWindowActor *window_actor = META_WINDOW_ACTOR (screen_cast_window);
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (window_actor);
MetaWindow *window;
window = priv->window;
if (!meta_window_has_pointer (window))
return FALSE;
if (cursor_sprite &&
meta_cursor_sprite_get_cogl_texture (cursor_sprite) &&
out_cursor_scale)
{
MetaLogicalMonitor *logical_monitor;
float view_scale;
float cursor_texture_scale;
logical_monitor = meta_window_get_main_logical_monitor (window);
if (meta_is_stage_views_scaled ())
view_scale = meta_logical_monitor_get_scale (logical_monitor);
else
view_scale = 1.0;
cursor_texture_scale = meta_cursor_sprite_get_texture_scale (cursor_sprite);
*out_cursor_scale = view_scale * cursor_texture_scale;
}
if (cursor_sprite &&
meta_cursor_sprite_get_cogl_texture (cursor_sprite) &&
out_cursor_transform)
{
*out_cursor_transform =
meta_cursor_sprite_get_texture_transform (cursor_sprite);
}
if (out_relative_cursor_position)
{
float resource_scale;
clutter_actor_transform_stage_point (CLUTTER_ACTOR (priv->surface),
cursor_position->x,
cursor_position->y,
&out_relative_cursor_position->x,
&out_relative_cursor_position->y);
resource_scale =
clutter_actor_get_resource_scale (CLUTTER_ACTOR (window_actor));
out_relative_cursor_position->x *= resource_scale;
out_relative_cursor_position->y *= resource_scale;
}
return TRUE;
}
static void
meta_window_actor_capture_into (MetaScreenCastWindow *screen_cast_window,
MetaRectangle *bounds,
uint8_t *data)
{
MetaWindowActor *window_actor = META_WINDOW_ACTOR (screen_cast_window);
cairo_surface_t *image;
uint8_t *cr_data;
int cr_stride;
int cr_width;
int cr_height;
int bpp = 4;
if (meta_window_actor_is_destroyed (window_actor))
return;
image = meta_window_actor_get_image (window_actor, bounds);
cr_data = cairo_image_surface_get_data (image);
cr_width = cairo_image_surface_get_width (image);
cr_height = cairo_image_surface_get_height (image);
cr_stride = cairo_image_surface_get_stride (image);
if (cr_width == bounds->width && cr_height == bounds->height)
{
memcpy (data, cr_data, cr_height * cr_stride);
}
else
{
int width = MIN (bounds->width, cr_width);
int height = MIN (bounds->height, cr_height);
int stride = width * bpp;
uint8_t *src, *dst;
src = cr_data;
dst = data;
for (int i = 0; i < height; i++)
{
memcpy (dst, src, stride);
if (width < bounds->width)
memset (dst + stride, 0, (bounds->width * bpp) - stride);
src += cr_stride;
dst += bounds->width * bpp;
}
for (int i = height; i < bounds->height; i++)
{
memset (dst, 0, bounds->width * bpp);
dst += bounds->width * bpp;
}
}
cairo_surface_destroy (image);
}
static gboolean
meta_window_actor_blit_to_framebuffer (MetaScreenCastWindow *screen_cast_window,
MetaRectangle *bounds,
CoglFramebuffer *framebuffer)
{
MetaWindowActor *window_actor = META_WINDOW_ACTOR (screen_cast_window);
ClutterActor *actor = CLUTTER_ACTOR (window_actor);
ClutterPaintContext *paint_context;
MetaRectangle scaled_clip;
CoglColor clear_color;
float resource_scale;
float width, height;
float x, y;
if (meta_window_actor_is_destroyed (window_actor))
return FALSE;
clutter_actor_get_size (actor, &width, &height);
if (width == 0 || height == 0)
return FALSE;
resource_scale = clutter_actor_get_resource_scale (actor);
clutter_actor_inhibit_culling (actor);
width = ceilf (width * resource_scale);
height = ceilf (height * resource_scale);
clutter_actor_get_position (actor, &x, &y);
cogl_color_init_from_4ub (&clear_color, 0, 0, 0, 0);
cogl_framebuffer_clear (framebuffer, COGL_BUFFER_BIT_COLOR, &clear_color);
cogl_framebuffer_orthographic (framebuffer, 0, 0, width, height, 0, 1.0);
cogl_framebuffer_set_viewport (framebuffer, 0, 0, width, height);
meta_rectangle_scale_double (bounds, resource_scale,
META_ROUNDING_STRATEGY_GROW,
&scaled_clip);
meta_rectangle_intersect (&scaled_clip,
&(MetaRectangle) {
.width = width,
.height = height,
},
&scaled_clip);
cogl_framebuffer_push_rectangle_clip (framebuffer,
scaled_clip.x, scaled_clip.y,
scaled_clip.x + scaled_clip.width,
scaled_clip.y + scaled_clip.height);
cogl_framebuffer_push_matrix (framebuffer);
cogl_framebuffer_scale (framebuffer, resource_scale, resource_scale, 1);
cogl_framebuffer_translate (framebuffer, -x, -y, 0);
paint_context =
clutter_paint_context_new_for_framebuffer (framebuffer, NULL,
CLUTTER_PAINT_FLAG_NONE);
clutter_actor_paint (actor, paint_context);
clutter_paint_context_destroy (paint_context);
cogl_framebuffer_pop_matrix (framebuffer);
cogl_framebuffer_pop_clip (framebuffer);
clutter_actor_uninhibit_culling (actor);
return TRUE;
}
static gboolean
meta_window_actor_has_damage (MetaScreenCastWindow *screen_cast_window)
{
return clutter_actor_has_damage (CLUTTER_ACTOR (screen_cast_window));
}
static void
screen_cast_window_iface_init (MetaScreenCastWindowInterface *iface)
{
iface->get_buffer_bounds = meta_window_actor_get_buffer_bounds;
iface->transform_relative_position = meta_window_actor_transform_relative_position;
iface->transform_cursor_position = meta_window_actor_transform_cursor_position;
iface->capture_into = meta_window_actor_capture_into;
iface->blit_to_framebuffer = meta_window_actor_blit_to_framebuffer;
iface->has_damage = meta_window_actor_has_damage;
}
MetaWindowActor *
meta_window_actor_from_actor (ClutterActor *actor)
{
if (!META_IS_SURFACE_ACTOR (actor))
return NULL;
do
{
actor = clutter_actor_get_parent (actor);
if (META_IS_WINDOW_ACTOR (actor))
return META_WINDOW_ACTOR (actor);
}
while (actor != NULL);
return NULL;
}
void
meta_window_actor_notify_damaged (MetaWindowActor *window_actor)
{
g_signal_emit (window_actor, signals[DAMAGED], 0);
}
static CoglFramebuffer *
create_framebuffer_from_window_actor (MetaWindowActor *self,
MetaRectangle *clip,
GError **error)
{
ClutterActor *actor = CLUTTER_ACTOR (self);
MetaBackend *backend = meta_get_backend ();
ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend);
CoglContext *cogl_context =
clutter_backend_get_cogl_context (clutter_backend);
CoglTexture2D *texture;
CoglOffscreen *offscreen;
CoglFramebuffer *framebuffer;
CoglColor clear_color;
ClutterPaintContext *paint_context;
float resource_scale;
resource_scale = clutter_actor_get_resource_scale (actor);
texture = cogl_texture_2d_new_with_size (cogl_context,
clip->width * resource_scale,
clip->height * resource_scale);
if (!texture)
return NULL;
cogl_primitive_texture_set_auto_mipmap (COGL_PRIMITIVE_TEXTURE (texture),
FALSE);
offscreen = cogl_offscreen_new_with_texture (COGL_TEXTURE (texture));
framebuffer = COGL_FRAMEBUFFER (offscreen);
cogl_object_unref (texture);
if (!cogl_framebuffer_allocate (framebuffer, error))
{
g_object_unref (framebuffer);
return NULL;
}
cogl_color_init_from_4ub (&clear_color, 0, 0, 0, 0);
cogl_framebuffer_clear (framebuffer, COGL_BUFFER_BIT_COLOR, &clear_color);
cogl_framebuffer_orthographic (framebuffer, 0, 0, clip->width, clip->height,
0, 1.0);
cogl_framebuffer_translate (framebuffer, -clip->x, -clip->y, 0);
paint_context =
clutter_paint_context_new_for_framebuffer (framebuffer, NULL,
CLUTTER_PAINT_FLAG_NONE);
clutter_actor_paint (actor, paint_context);
clutter_paint_context_destroy (paint_context);
return framebuffer;
}
static gboolean
meta_window_actor_is_single_surface_actor (MetaWindowActor *self)
{
return META_WINDOW_ACTOR_GET_CLASS (self)->is_single_surface_actor (self);
}
/**
* meta_window_actor_get_image:
* @self: A #MetaWindowActor
* @clip: (nullable): A clipping rectangle, to help prevent extra processing.
* In the case that the clipping rectangle is partially or fully
* outside the bounds of the actor, the rectangle will be clipped.
*
* Flattens the layers of @self into one ARGB32 image by alpha blending
* the images, and returns the flattened image.
*
* Returns: (nullable) (transfer full): a new cairo surface to be freed with
* cairo_surface_destroy().
*/
cairo_surface_t *
meta_window_actor_get_image (MetaWindowActor *self,
MetaRectangle *clip)
{
MetaWindowActorPrivate *priv = meta_window_actor_get_instance_private (self);
ClutterActor *actor = CLUTTER_ACTOR (self);
MetaShapedTexture *stex;
cairo_surface_t *surface = NULL;
CoglFramebuffer *framebuffer;
MetaRectangle framebuffer_clip;
float resource_scale;
float x, y, width, height;
if (!priv->surface)
return NULL;
clutter_actor_inhibit_culling (actor);
stex = meta_surface_actor_get_texture (priv->surface);
if (!meta_shaped_texture_should_get_via_offscreen (stex) &&
meta_window_actor_is_single_surface_actor (self))
{
MetaRectangle *surface_clip = NULL;
if (clip)
{
int geometry_scale;
geometry_scale =
meta_window_actor_get_geometry_scale (self);
surface_clip = g_alloca (sizeof (MetaRectangle));
surface_clip->x = clip->x / geometry_scale,
surface_clip->y = clip->y / geometry_scale;
surface_clip->width = clip->width / geometry_scale;
surface_clip->height = clip->height / geometry_scale;
}
surface = meta_shaped_texture_get_image (stex, surface_clip);
goto out;
}
clutter_actor_get_position (actor, &x, &y);
clutter_actor_get_size (actor, &width, &height);
if (width == 0 || height == 0)
goto out;
framebuffer_clip = (MetaRectangle) {
.x = floorf (x),
.y = floorf (y),
.width = ceilf (width),
.height = ceilf (height),
};
if (clip)
{
MetaRectangle tmp_clip;
MetaRectangle intersected_clip;
tmp_clip = *clip;
tmp_clip.x += floorf (x);
tmp_clip.y += floorf (y);
if (!meta_rectangle_intersect (&framebuffer_clip,
&tmp_clip,
&intersected_clip))
goto out;
framebuffer_clip = intersected_clip;
}
framebuffer = create_framebuffer_from_window_actor (self,
&framebuffer_clip,
NULL);
if (!framebuffer)
goto out;
resource_scale = clutter_actor_get_resource_scale (actor);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
framebuffer_clip.width *
resource_scale,
framebuffer_clip.height *
resource_scale);
cogl_framebuffer_read_pixels (framebuffer,
0, 0,
framebuffer_clip.width * resource_scale,
framebuffer_clip.height * resource_scale,
CLUTTER_CAIRO_FORMAT_ARGB32,
cairo_image_surface_get_data (surface));
g_object_unref (framebuffer);
cairo_surface_mark_dirty (surface);
out:
clutter_actor_uninhibit_culling (actor);
return surface;
}
/**
* meta_window_actor_paint_to_content:
* @self: A #MetaWindowActor
* @clip: (nullable): A clipping rectangle, in actor coordinates, to help
* prevent extra processing.
* In the case that the clipping rectangle is partially or fully
* outside the bounds of the actor, the rectangle will be clipped.
* @error: A #GError to catch exceptional errors or %NULL.
*
* Returns: (nullable) (transfer full): a new #ClutterContent
*/
ClutterContent *
meta_window_actor_paint_to_content (MetaWindowActor *self,
MetaRectangle *clip,
GError **error)
{
MetaWindowActorPrivate *priv = meta_window_actor_get_instance_private (self);
ClutterActor *actor = CLUTTER_ACTOR (self);
ClutterContent *content = NULL;
CoglFramebuffer *framebuffer;
CoglTexture *texture;
MetaRectangle framebuffer_clip;
float x, y, width, height;
if (!priv->surface)
return NULL;
clutter_actor_inhibit_culling (actor);
clutter_actor_get_position (actor, &x, &y);
clutter_actor_get_size (actor, &width, &height);
if (width == 0 || height == 0)
goto out;
framebuffer_clip = (MetaRectangle) {
.x = floorf (x),
.y = floorf (y),
.width = ceilf (width),
.height = ceilf (height),
};
if (clip)
{
MetaRectangle tmp_clip;
if (!meta_rectangle_intersect (&framebuffer_clip, clip, &tmp_clip))
goto out;
framebuffer_clip = tmp_clip;
}
framebuffer = create_framebuffer_from_window_actor (self,
&framebuffer_clip,
error);
if (!framebuffer)
goto out;
texture = cogl_offscreen_get_texture (COGL_OFFSCREEN (framebuffer));
content = clutter_texture_content_new_from_texture (texture, NULL);
g_object_unref (framebuffer);
out:
clutter_actor_uninhibit_culling (actor);
return content;
}
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