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mutter/src/backends/meta-stage.c

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/*
* Copyright (C) 2014 Red Hat
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written by:
* Jasper St. Pierre <jstpierre@mecheye.net>
*/
#include "config.h"
#include "backends/meta-stage-private.h"
#include "backends/meta-backend-private.h"
#include "clutter/clutter-mutter.h"
#include "meta/meta-backend.h"
#include "meta/meta-monitor-manager.h"
#include "meta/util.h"
#define N_WATCH_MODES 4
enum
{
ACTORS_PAINTED,
N_SIGNALS
};
static guint signals[N_SIGNALS];
struct _MetaStageWatch
{
ClutterStageView *view;
MetaStageWatchFunc callback;
gpointer user_data;
};
struct _MetaOverlay
{
gboolean enabled;
CoglPipeline *pipeline;
CoglTexture *texture;
graphene_rect_t current_rect;
graphene_rect_t previous_rect;
gboolean previous_is_valid;
};
struct _MetaStage
{
ClutterStage parent;
GPtrArray *watchers[N_WATCH_MODES];
ClutterStageView *current_view;
GList *overlays;
gboolean is_active;
};
G_DEFINE_TYPE (MetaStage, meta_stage, CLUTTER_TYPE_STAGE);
static MetaOverlay *
meta_overlay_new (void)
{
MetaOverlay *overlay;
CoglContext *ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
overlay = g_slice_new0 (MetaOverlay);
overlay->pipeline = cogl_pipeline_new (ctx);
return overlay;
}
static void
meta_overlay_free (MetaOverlay *overlay)
{
if (overlay->pipeline)
cogl_object_unref (overlay->pipeline);
g_slice_free (MetaOverlay, overlay);
}
static void
meta_overlay_set (MetaOverlay *overlay,
CoglTexture *texture,
graphene_rect_t *rect)
{
if (overlay->texture != texture)
{
overlay->texture = texture;
if (texture)
{
cogl_pipeline_set_layer_texture (overlay->pipeline, 0, texture);
overlay->enabled = TRUE;
}
else
{
cogl_pipeline_set_layer_texture (overlay->pipeline, 0, NULL);
overlay->enabled = FALSE;
}
}
overlay->current_rect = *rect;
}
static void
meta_overlay_paint (MetaOverlay *overlay)
{
if (!overlay->enabled)
return;
g_assert (meta_is_wayland_compositor ());
cogl_framebuffer_draw_rectangle (cogl_get_draw_framebuffer (),
overlay->pipeline,
overlay->current_rect.origin.x,
overlay->current_rect.origin.y,
(overlay->current_rect.origin.x +
overlay->current_rect.size.width),
(overlay->current_rect.origin.y +
overlay->current_rect.size.height));
if (!graphene_rect_equal (&overlay->previous_rect, &overlay->current_rect))
{
overlay->previous_rect = overlay->current_rect;
overlay->previous_is_valid = TRUE;
}
}
static void
meta_stage_finalize (GObject *object)
{
MetaStage *stage = META_STAGE (object);
GList *l;
int i;
l = stage->overlays;
while (l)
{
meta_overlay_free (l->data);
l = g_list_delete_link (l, l);
}
for (i = 0; i < N_WATCH_MODES; i++)
g_clear_pointer (&stage->watchers[i], g_ptr_array_unref);
G_OBJECT_CLASS (meta_stage_parent_class)->finalize (object);
}
static void
notify_watchers_for_mode (MetaStage *stage,
ClutterStageView *view,
MetaStageWatchPhase watch_phase)
{
GPtrArray *watchers;
int i;
watchers = stage->watchers[watch_phase];
for (i = 0; i < watchers->len; i++)
{
MetaStageWatch *watch = g_ptr_array_index (watchers, i);
if (watch->view && view != watch->view)
continue;
watch->callback (stage, view, watch->user_data);
}
}
static void
meta_stage_paint (ClutterActor *actor)
{
MetaStage *stage = META_STAGE (actor);
GList *l;
CLUTTER_ACTOR_CLASS (meta_stage_parent_class)->paint (actor);
notify_watchers_for_mode (stage, stage->current_view,
META_STAGE_WATCH_AFTER_ACTOR_PAINT);
g_signal_emit (stage, signals[ACTORS_PAINTED], 0);
for (l = stage->overlays; l; l = l->next)
meta_overlay_paint (l->data);
notify_watchers_for_mode (stage, stage->current_view,
META_STAGE_WATCH_AFTER_OVERLAY_PAINT);
}
static void
meta_stage_paint_view (ClutterStage *stage,
ClutterStageView *view)
{
MetaStage *meta_stage = META_STAGE (stage);
notify_watchers_for_mode (meta_stage, view, META_STAGE_WATCH_BEFORE_PAINT);
meta_stage->current_view = view;
CLUTTER_STAGE_CLASS (meta_stage_parent_class)->paint_view (stage, view);
notify_watchers_for_mode (meta_stage, view, META_STAGE_WATCH_AFTER_PAINT);
}
static void
meta_stage_activate (ClutterStage *actor)
{
MetaStage *stage = META_STAGE (actor);
CLUTTER_STAGE_CLASS (meta_stage_parent_class)->activate (actor);
stage->is_active = TRUE;
}
static void
meta_stage_deactivate (ClutterStage *actor)
{
MetaStage *stage = META_STAGE (actor);
CLUTTER_STAGE_CLASS (meta_stage_parent_class)->deactivate (actor);
stage->is_active = FALSE;
}
static void
on_power_save_changed (MetaMonitorManager *monitor_manager,
MetaStage *stage)
{
if (meta_monitor_manager_get_power_save_mode (monitor_manager) ==
META_POWER_SAVE_ON)
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
}
static void
meta_stage_class_init (MetaStageClass *klass)
{
ClutterStageClass *stage_class = (ClutterStageClass *) klass;
ClutterActorClass *actor_class = (ClutterActorClass *) klass;
GObjectClass *object_class = (GObjectClass *) klass;
object_class->finalize = meta_stage_finalize;
actor_class->paint = meta_stage_paint;
stage_class->activate = meta_stage_activate;
stage_class->deactivate = meta_stage_deactivate;
stage_class->paint_view = meta_stage_paint_view;
signals[ACTORS_PAINTED] = g_signal_new ("actors-painted",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
}
static void
meta_stage_init (MetaStage *stage)
{
int i;
for (i = 0; i < N_WATCH_MODES; i++)
stage->watchers[i] = g_ptr_array_new_with_free_func (g_free);
}
ClutterActor *
meta_stage_new (MetaBackend *backend)
{
MetaStage *stage;
MetaMonitorManager *monitor_manager;
stage = g_object_new (META_TYPE_STAGE,
"cursor-visible", FALSE,
NULL);
monitor_manager = meta_backend_get_monitor_manager (backend);
g_signal_connect (monitor_manager, "power-save-mode-changed",
G_CALLBACK (on_power_save_changed),
stage);
return CLUTTER_ACTOR (stage);
}
static void
queue_redraw_clutter_rect (MetaStage *stage,
MetaOverlay *overlay,
graphene_rect_t *rect)
{
cairo_rectangle_int_t clip = {
.x = floorf (rect->origin.x),
.y = floorf (rect->origin.y),
.width = ceilf (rect->size.width),
.height = ceilf (rect->size.height)
};
/* Since we're flooring the coordinates, we need to enlarge the clip by the
* difference between the actual coordinate and the floored value */
clip.width += ceilf (rect->origin.x - clip.x) * 2;
clip.height += ceilf (rect->origin.y - clip.y) * 2;
clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (stage), &clip);
}
static void
queue_redraw_for_overlay (MetaStage *stage,
MetaOverlay *overlay)
{
/* Clear the location the overlay was at before, if we need to. */
if (overlay->previous_is_valid)
{
queue_redraw_clutter_rect (stage, overlay, &overlay->previous_rect);
overlay->previous_is_valid = FALSE;
}
/* Draw the overlay at the new position */
if (overlay->enabled)
queue_redraw_clutter_rect (stage, overlay, &overlay->current_rect);
}
MetaOverlay *
meta_stage_create_cursor_overlay (MetaStage *stage)
{
MetaOverlay *overlay;
overlay = meta_overlay_new ();
stage->overlays = g_list_prepend (stage->overlays, overlay);
return overlay;
}
void
meta_stage_remove_cursor_overlay (MetaStage *stage,
MetaOverlay *overlay)
{
GList *link;
link = g_list_find (stage->overlays, overlay);
if (!link)
return;
stage->overlays = g_list_delete_link (stage->overlays, link);
meta_overlay_free (overlay);
}
void
meta_stage_update_cursor_overlay (MetaStage *stage,
MetaOverlay *overlay,
CoglTexture *texture,
graphene_rect_t *rect)
{
g_assert (meta_is_wayland_compositor () || texture == NULL);
meta_overlay_set (overlay, texture, rect);
queue_redraw_for_overlay (stage, overlay);
}
void
meta_stage_set_active (MetaStage *stage,
gboolean is_active)
{
ClutterEvent event = { 0 };
/* Used by the native backend to inform accessibility technologies
* about when the stage loses and gains input focus.
*
* For the X11 backend, clutter transparently takes care of this
* for us.
*/
if (stage->is_active == is_active)
return;
event.type = CLUTTER_STAGE_STATE;
clutter_event_set_stage (&event, CLUTTER_STAGE (stage));
event.stage_state.changed_mask = CLUTTER_STAGE_STATE_ACTIVATED;
if (is_active)
event.stage_state.new_state = CLUTTER_STAGE_STATE_ACTIVATED;
/* Emitting this StageState event will result in the stage getting
* activated or deactivated (with the activated or deactivated signal
* getting emitted from the stage)
*
* FIXME: This won't update ClutterStage's own notion of its
* activeness. For that we would need to somehow trigger a
* _clutter_stage_update_state call, which will probably
* require new API in clutter. In practice, nothing relies
* on the ClutterStage's own notion of activeness when using
* the EGL backend.
*
* See http://bugzilla.gnome.org/746670
*/
clutter_stage_event (CLUTTER_STAGE (stage), &event);
}
MetaStageWatch *
meta_stage_watch_view (MetaStage *stage,
ClutterStageView *view,
MetaStageWatchPhase watch_phase,
MetaStageWatchFunc callback,
gpointer user_data)
{
MetaStageWatch *watch;
GPtrArray *watchers;
watch = g_new0 (MetaStageWatch, 1);
watch->view = view;
watch->callback = callback;
watch->user_data = user_data;
watchers = stage->watchers[watch_phase];
g_ptr_array_add (watchers, watch);
return watch;
}
void
meta_stage_remove_watch (MetaStage *stage,
MetaStageWatch *watch)
{
GPtrArray *watchers;
gboolean removed = FALSE;
int i;
for (i = 0; i < N_WATCH_MODES; i++)
{
watchers = stage->watchers[i];
removed = g_ptr_array_remove_fast (watchers, watch);
if (removed)
break;
}
g_assert (removed);
}
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