mirror of
https://github.com/brl/mutter.git
synced 2025-02-04 07:34:09 +00:00
0da8a49719
The first comment isn't really needed anymore since the is_full_stage_redraw_queued() underneath is quite self-explaining. Also rephrase the second comment a bit, including that _clutter_paint_volume_get_stage_paint_box() does the aligning to the pixel grid. Finally, the last comment also looks out of date since we do that rounding inside _clutter_paint_volume_get_stage_paint_box(), so remove it. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1511>
3537 lines
105 KiB
C
3537 lines
105 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* SECTION:clutter-stage
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* @short_description: Top level visual element to which actors are placed.
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*
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* #ClutterStage is a top level 'window' on which child actors are placed
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* and manipulated.
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*
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* Backends might provide support for multiple stages. The support for this
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* feature can be checked at run-time using the clutter_feature_available()
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* function and the %CLUTTER_FEATURE_STAGE_MULTIPLE flag. If the backend used
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* supports multiple stages, new #ClutterStage instances can be created
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* using clutter_stage_new(). These stages must be managed by the developer
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* using clutter_actor_destroy(), which will take care of destroying all the
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* actors contained inside them.
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*
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* #ClutterStage is a proxy actor, wrapping the backend-specific implementation
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* (a #StageWindow) of the windowing system. It is possible to subclass
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* #ClutterStage, as long as every overridden virtual function chains up to the
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* parent class corresponding function.
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*/
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#include "clutter-build-config.h"
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#include <math.h>
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#include <cairo-gobject.h>
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#define CLUTTER_DISABLE_DEPRECATION_WARNINGS
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#define CLUTTER_ENABLE_EXPERIMENTAL_API
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#include "clutter-stage.h"
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#include "deprecated/clutter-container.h"
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#include "clutter-actor-private.h"
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#include "clutter-backend-private.h"
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#include "clutter-cairo.h"
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#include "clutter-container.h"
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#include "clutter-debug.h"
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#include "clutter-enum-types.h"
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#include "clutter-event-private.h"
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#include "clutter-frame-clock.h"
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#include "clutter-id-pool.h"
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#include "clutter-input-device-private.h"
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#include "clutter-main.h"
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#include "clutter-marshal.h"
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#include "clutter-mutter.h"
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#include "clutter-paint-context-private.h"
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#include "clutter-paint-volume-private.h"
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#include "clutter-pick-context-private.h"
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#include "clutter-private.h"
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#include "clutter-stage-manager-private.h"
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#include "clutter-stage-private.h"
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#include "clutter-stage-view-private.h"
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#include "clutter-private.h"
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#include "cogl/cogl.h"
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#define MAX_FRUSTA 64
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typedef struct _QueueRedrawEntry
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{
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gboolean has_clip;
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ClutterPaintVolume clip;
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} QueueRedrawEntry;
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typedef struct _PickRecord
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{
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graphene_point_t vertex[4];
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ClutterActor *actor;
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int clip_stack_top;
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} PickRecord;
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typedef struct _PickClipRecord
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{
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int prev;
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graphene_point_t vertex[4];
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} PickClipRecord;
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struct _ClutterStagePrivate
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{
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/* the stage implementation */
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ClutterStageWindow *impl;
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ClutterPerspective perspective;
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graphene_matrix_t projection;
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graphene_matrix_t inverse_projection;
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graphene_matrix_t view;
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float viewport[4];
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gchar *title;
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ClutterActor *key_focused_actor;
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GQueue *event_queue;
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GArray *paint_volume_stack;
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GSList *pending_relayouts;
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GHashTable *pending_queue_redraws;
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gint sync_delay;
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GTimer *fps_timer;
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gint32 timer_n_frames;
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ClutterPickStack *pick_stack;
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ClutterPickMode cached_pick_mode;
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ClutterStageState current_state;
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int update_freeze_count;
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gboolean needs_update_devices;
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gboolean pending_finish_queue_redraws;
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guint throttle_motion_events : 1;
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guint min_size_changed : 1;
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guint motion_events_enabled : 1;
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guint actor_needs_immediate_relayout : 1;
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};
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enum
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{
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PROP_0,
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PROP_PERSPECTIVE,
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PROP_TITLE,
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PROP_KEY_FOCUS,
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PROP_LAST
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};
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static GParamSpec *obj_props[PROP_LAST] = { NULL, };
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enum
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{
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ACTIVATE,
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DEACTIVATE,
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DELETE_EVENT,
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BEFORE_UPDATE,
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BEFORE_PAINT,
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AFTER_PAINT,
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AFTER_UPDATE,
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PAINT_VIEW,
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PRESENTED,
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GL_VIDEO_MEMORY_PURGED,
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LAST_SIGNAL
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};
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static guint stage_signals[LAST_SIGNAL] = { 0, };
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static const ClutterColor default_stage_color = { 255, 255, 255, 255 };
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static void free_queue_redraw_entry (QueueRedrawEntry *entry);
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static void capture_view_into (ClutterStage *stage,
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gboolean paint,
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ClutterStageView *view,
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cairo_rectangle_int_t *rect,
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uint8_t *data,
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int stride);
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static void clutter_stage_update_view_perspective (ClutterStage *stage);
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static void clutter_stage_set_viewport (ClutterStage *stage,
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float width,
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float height);
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G_DEFINE_TYPE_WITH_PRIVATE (ClutterStage, clutter_stage, CLUTTER_TYPE_ACTOR)
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static void
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clutter_stage_get_preferred_width (ClutterActor *self,
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gfloat for_height,
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gfloat *min_width_p,
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gfloat *natural_width_p)
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{
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ClutterStagePrivate *priv = CLUTTER_STAGE (self)->priv;
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cairo_rectangle_int_t geom;
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if (priv->impl == NULL)
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return;
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_clutter_stage_window_get_geometry (priv->impl, &geom);
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if (min_width_p)
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*min_width_p = geom.width;
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if (natural_width_p)
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*natural_width_p = geom.width;
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}
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static void
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clutter_stage_get_preferred_height (ClutterActor *self,
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gfloat for_width,
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gfloat *min_height_p,
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gfloat *natural_height_p)
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{
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ClutterStagePrivate *priv = CLUTTER_STAGE (self)->priv;
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cairo_rectangle_int_t geom;
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if (priv->impl == NULL)
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return;
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_clutter_stage_window_get_geometry (priv->impl, &geom);
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if (min_height_p)
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*min_height_p = geom.height;
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if (natural_height_p)
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*natural_height_p = geom.height;
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}
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static void
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_clutter_stage_clear_pick_stack (ClutterStage *stage)
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{
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ClutterStagePrivate *priv = stage->priv;
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g_clear_pointer (&priv->pick_stack, clutter_pick_stack_unref);
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priv->cached_pick_mode = CLUTTER_PICK_NONE;
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}
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static void
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clutter_stage_add_redraw_clip (ClutterStage *stage,
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cairo_rectangle_int_t *clip)
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{
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GList *l;
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for (l = clutter_stage_peek_stage_views (stage); l; l = l->next)
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{
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ClutterStageView *view = l->data;
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if (!clip)
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{
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clutter_stage_view_add_redraw_clip (view, NULL);
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}
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else
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{
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cairo_rectangle_int_t view_layout;
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cairo_rectangle_int_t intersection;
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clutter_stage_view_get_layout (view, &view_layout);
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if (_clutter_util_rectangle_intersection (&view_layout, clip,
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&intersection))
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clutter_stage_view_add_redraw_clip (view, &intersection);
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}
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}
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}
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static inline void
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queue_full_redraw (ClutterStage *stage)
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{
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ClutterStageWindow *stage_window;
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if (CLUTTER_ACTOR_IN_DESTRUCTION (stage))
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return;
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clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
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/* Just calling clutter_actor_queue_redraw will typically only
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* redraw the bounding box of the children parented on the stage but
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* in this case we really need to ensure that the full stage is
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* redrawn so we add a NULL redraw clip to the stage window. */
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stage_window = _clutter_stage_get_window (stage);
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if (stage_window == NULL)
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return;
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clutter_stage_add_redraw_clip (stage, NULL);
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}
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static void
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clutter_stage_allocate (ClutterActor *self,
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const ClutterActorBox *box)
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{
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ClutterStagePrivate *priv = CLUTTER_STAGE (self)->priv;
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ClutterActorBox alloc = CLUTTER_ACTOR_BOX_INIT_ZERO;
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float new_width, new_height;
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float width, height;
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cairo_rectangle_int_t window_size;
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ClutterLayoutManager *layout_manager = clutter_actor_get_layout_manager (self);
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if (priv->impl == NULL)
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return;
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/* the current allocation */
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clutter_actor_box_get_size (box, &width, &height);
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/* the current Stage implementation size */
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_clutter_stage_window_get_geometry (priv->impl, &window_size);
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/* if the stage is fixed size (for instance, it's using a EGL framebuffer)
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* then we simply ignore any allocation request and override the
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* allocation chain - because we cannot forcibly change the size of the
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* stage window.
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*/
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if (!clutter_feature_available (CLUTTER_FEATURE_STAGE_STATIC))
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{
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ClutterActorBox children_box;
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children_box.x1 = children_box.y1 = 0.f;
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children_box.x2 = box->x2 - box->x1;
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children_box.y2 = box->y2 - box->y1;
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CLUTTER_NOTE (LAYOUT,
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"Following allocation to %.2fx%.2f",
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width, height);
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clutter_actor_set_allocation (self, box);
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clutter_layout_manager_allocate (layout_manager,
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CLUTTER_CONTAINER (self),
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&children_box);
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/* Ensure the window is sized correctly */
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if (priv->min_size_changed)
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{
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gfloat min_width, min_height;
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gboolean min_width_set, min_height_set;
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g_object_get (G_OBJECT (self),
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"min-width", &min_width,
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"min-width-set", &min_width_set,
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"min-height", &min_height,
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"min-height-set", &min_height_set,
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NULL);
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if (!min_width_set)
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min_width = 1;
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if (!min_height_set)
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min_height = 1;
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if (width < min_width)
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width = min_width;
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if (height < min_height)
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height = min_height;
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priv->min_size_changed = FALSE;
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}
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if (window_size.width != CLUTTER_NEARBYINT (width) ||
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window_size.height != CLUTTER_NEARBYINT (height))
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{
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_clutter_stage_window_resize (priv->impl,
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CLUTTER_NEARBYINT (width),
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CLUTTER_NEARBYINT (height));
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}
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}
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else
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{
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ClutterActorBox override = { 0, };
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/* override the passed allocation */
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override.x1 = 0;
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override.y1 = 0;
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override.x2 = window_size.width;
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override.y2 = window_size.height;
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CLUTTER_NOTE (LAYOUT,
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"Overriding original allocation of %.2fx%.2f "
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"with %.2fx%.2f",
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width, height,
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override.x2, override.y2);
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/* and store the overridden allocation */
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clutter_actor_set_allocation (self, &override);
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clutter_layout_manager_allocate (layout_manager,
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CLUTTER_CONTAINER (self),
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&override);
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}
|
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|
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/* set the viewport to the new allocation */
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clutter_actor_get_allocation_box (self, &alloc);
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clutter_actor_box_get_size (&alloc, &new_width, &new_height);
|
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clutter_stage_set_viewport (CLUTTER_STAGE (self), new_width, new_height);
|
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}
|
||
|
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static void
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setup_clip_frustum (ClutterStage *stage,
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const cairo_rectangle_int_t *clip,
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graphene_frustum_t *frustum)
|
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{
|
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ClutterStagePrivate *priv = stage->priv;
|
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cairo_rectangle_int_t geom;
|
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graphene_point3d_t camera_position;
|
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graphene_point3d_t p[4];
|
||
graphene_plane_t planes[6];
|
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graphene_vec4_t v;
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int i;
|
||
|
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_clutter_stage_window_get_geometry (priv->impl, &geom);
|
||
|
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CLUTTER_NOTE (CLIPPING, "Creating stage clip frustum for "
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"x=%d, y=%d, width=%d, height=%d",
|
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clip->x, clip->y, clip->width, clip->height);
|
||
|
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camera_position = GRAPHENE_POINT3D_INIT_ZERO;
|
||
|
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p[0] = GRAPHENE_POINT3D_INIT (MAX (clip->x, 0), MAX (clip->y, 0), 0.f);
|
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p[2] = GRAPHENE_POINT3D_INIT (MIN (clip->x + clip->width, geom.width),
|
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MIN (clip->y + clip->height, geom.height),
|
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0.f);
|
||
|
||
for (i = 0; i < 2; i++)
|
||
{
|
||
float w = 1.0;
|
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cogl_graphene_matrix_project_point (&priv->view,
|
||
&p[2 * i].x,
|
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&p[2 * i].y,
|
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&p[2 * i].z,
|
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&w);
|
||
}
|
||
|
||
graphene_point3d_init (&p[1], p[2].x, p[0].y, p[0].z);
|
||
graphene_point3d_init (&p[3], p[0].x, p[2].y, p[0].z);
|
||
|
||
for (i = 0; i < 4; i++)
|
||
{
|
||
graphene_plane_init_from_points (&planes[i],
|
||
&camera_position,
|
||
&p[i],
|
||
&p[(i + 1) % 4]);
|
||
}
|
||
|
||
graphene_vec4_init (&v, 0.f, 0.f, -1.f, priv->perspective.z_near);
|
||
graphene_plane_init_from_vec4 (&planes[4], &v);
|
||
|
||
graphene_vec4_init (&v, 0.f, 0.f, 1.f, priv->perspective.z_far);
|
||
graphene_plane_init_from_vec4 (&planes[5], &v);
|
||
|
||
graphene_frustum_init (frustum,
|
||
&planes[0], &planes[1],
|
||
&planes[2], &planes[3],
|
||
&planes[4], &planes[5]);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_do_paint_view (ClutterStage *stage,
|
||
ClutterStageView *view,
|
||
const cairo_region_t *redraw_clip)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
ClutterPaintContext *paint_context;
|
||
cairo_rectangle_int_t clip_rect;
|
||
g_autoptr (GArray) clip_frusta = NULL;
|
||
graphene_frustum_t clip_frustum;
|
||
int n_rectangles;
|
||
|
||
/* Any mode of painting/picking invalidates the pick cache, unless we're
|
||
* in the middle of building it. So we reset the cached flag but don't
|
||
* completely clear the pick stack.
|
||
*/
|
||
priv->cached_pick_mode = CLUTTER_PICK_NONE;
|
||
|
||
n_rectangles = redraw_clip ? cairo_region_num_rectangles (redraw_clip) : 0;
|
||
if (redraw_clip && n_rectangles < MAX_FRUSTA)
|
||
{
|
||
int i;
|
||
|
||
clip_frusta = g_array_sized_new (FALSE, FALSE,
|
||
sizeof (graphene_frustum_t),
|
||
n_rectangles);
|
||
|
||
for (i = 0; i < n_rectangles; i++)
|
||
{
|
||
cairo_region_get_rectangle (redraw_clip, i, &clip_rect);
|
||
setup_clip_frustum (stage, &clip_rect, &clip_frustum);
|
||
g_array_append_val (clip_frusta, clip_frustum);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
clip_frusta = g_array_sized_new (FALSE, FALSE,
|
||
sizeof (graphene_frustum_t),
|
||
1);
|
||
if (redraw_clip)
|
||
cairo_region_get_extents (redraw_clip, &clip_rect);
|
||
else
|
||
clutter_stage_view_get_layout (view, &clip_rect);
|
||
|
||
setup_clip_frustum (stage, &clip_rect, &clip_frustum);
|
||
g_array_append_val (clip_frusta, clip_frustum);
|
||
}
|
||
|
||
_clutter_stage_paint_volume_stack_free_all (stage);
|
||
|
||
paint_context = clutter_paint_context_new_for_view (view,
|
||
redraw_clip,
|
||
clip_frusta,
|
||
CLUTTER_PAINT_FLAG_NONE);
|
||
|
||
clutter_actor_paint (CLUTTER_ACTOR (stage), paint_context);
|
||
clutter_paint_context_destroy (paint_context);
|
||
}
|
||
|
||
/* This provides a common point of entry for painting the scenegraph
|
||
* for picking or painting...
|
||
*/
|
||
void
|
||
clutter_stage_paint_view (ClutterStage *stage,
|
||
ClutterStageView *view,
|
||
const cairo_region_t *redraw_clip)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
|
||
if (!priv->impl)
|
||
return;
|
||
|
||
COGL_TRACE_BEGIN_SCOPED (ClutterStagePaintView, "Paint (view)");
|
||
|
||
if (g_signal_has_handler_pending (stage, stage_signals[PAINT_VIEW],
|
||
0, TRUE))
|
||
g_signal_emit (stage, stage_signals[PAINT_VIEW], 0, view, redraw_clip);
|
||
else
|
||
CLUTTER_STAGE_GET_CLASS (stage)->paint_view (stage, view, redraw_clip);
|
||
}
|
||
|
||
void
|
||
clutter_stage_emit_before_update (ClutterStage *stage,
|
||
ClutterStageView *view)
|
||
{
|
||
g_signal_emit (stage, stage_signals[BEFORE_UPDATE], 0, view);
|
||
}
|
||
|
||
void
|
||
clutter_stage_emit_before_paint (ClutterStage *stage,
|
||
ClutterStageView *view)
|
||
{
|
||
g_signal_emit (stage, stage_signals[BEFORE_PAINT], 0, view);
|
||
}
|
||
|
||
void
|
||
clutter_stage_emit_after_paint (ClutterStage *stage,
|
||
ClutterStageView *view)
|
||
{
|
||
g_signal_emit (stage, stage_signals[AFTER_PAINT], 0, view);
|
||
}
|
||
|
||
void
|
||
clutter_stage_emit_after_update (ClutterStage *stage,
|
||
ClutterStageView *view)
|
||
{
|
||
g_signal_emit (stage, stage_signals[AFTER_UPDATE], 0, view);
|
||
}
|
||
|
||
static gboolean
|
||
clutter_stage_get_paint_volume (ClutterActor *self,
|
||
ClutterPaintVolume *volume)
|
||
{
|
||
/* Returning False effectively means Clutter has to assume it covers
|
||
* everything... */
|
||
return FALSE;
|
||
}
|
||
|
||
static void
|
||
clutter_stage_realize (ClutterActor *self)
|
||
{
|
||
ClutterStagePrivate *priv = CLUTTER_STAGE (self)->priv;
|
||
gboolean is_realized;
|
||
|
||
g_assert (priv->impl != NULL);
|
||
is_realized = _clutter_stage_window_realize (priv->impl);
|
||
|
||
if (!is_realized)
|
||
CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_REALIZED);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_unrealize (ClutterActor *self)
|
||
{
|
||
ClutterStagePrivate *priv = CLUTTER_STAGE (self)->priv;
|
||
|
||
/* and then unrealize the implementation */
|
||
g_assert (priv->impl != NULL);
|
||
_clutter_stage_window_unrealize (priv->impl);
|
||
|
||
CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_REALIZED);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_show (ClutterActor *self)
|
||
{
|
||
ClutterStagePrivate *priv = CLUTTER_STAGE (self)->priv;
|
||
|
||
CLUTTER_ACTOR_CLASS (clutter_stage_parent_class)->show (self);
|
||
|
||
/* Possibly do an allocation run so that the stage will have the
|
||
right size before we map it */
|
||
clutter_stage_maybe_relayout (self);
|
||
|
||
g_assert (priv->impl != NULL);
|
||
_clutter_stage_window_show (priv->impl, TRUE);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_hide_all (ClutterActor *self)
|
||
{
|
||
ClutterActorIter iter;
|
||
ClutterActor *child;
|
||
|
||
clutter_actor_hide (self);
|
||
|
||
/* we don't do a recursive hide_all(), to maintain the old invariants
|
||
* from ClutterGroup
|
||
*/
|
||
clutter_actor_iter_init (&iter, self);
|
||
while (clutter_actor_iter_next (&iter, &child))
|
||
clutter_actor_hide (child);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_hide (ClutterActor *self)
|
||
{
|
||
ClutterStagePrivate *priv = CLUTTER_STAGE (self)->priv;
|
||
|
||
g_assert (priv->impl != NULL);
|
||
_clutter_stage_clear_pick_stack (CLUTTER_STAGE (self));
|
||
_clutter_stage_window_hide (priv->impl);
|
||
|
||
CLUTTER_ACTOR_CLASS (clutter_stage_parent_class)->hide (self);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_emit_key_focus_event (ClutterStage *stage,
|
||
gboolean focus_in)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
|
||
if (priv->key_focused_actor == NULL)
|
||
return;
|
||
|
||
_clutter_actor_set_has_key_focus (CLUTTER_ACTOR (stage), focus_in);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (stage), obj_props[PROP_KEY_FOCUS]);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_real_activate (ClutterStage *stage)
|
||
{
|
||
clutter_stage_emit_key_focus_event (stage, TRUE);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_real_deactivate (ClutterStage *stage)
|
||
{
|
||
clutter_stage_emit_key_focus_event (stage, FALSE);
|
||
}
|
||
|
||
void
|
||
_clutter_stage_queue_event (ClutterStage *stage,
|
||
ClutterEvent *event,
|
||
gboolean copy_event)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
gboolean first_event;
|
||
ClutterInputDevice *device;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
priv = stage->priv;
|
||
|
||
first_event = priv->event_queue->length == 0;
|
||
|
||
if (copy_event)
|
||
event = clutter_event_copy (event);
|
||
|
||
/* if needed, update the state of the input device of the event.
|
||
* we do it here to avoid calling the same code from every backend
|
||
* event processing function
|
||
*/
|
||
device = clutter_event_get_device (event);
|
||
if (device != NULL &&
|
||
event->type != CLUTTER_PROXIMITY_IN &&
|
||
event->type != CLUTTER_PROXIMITY_OUT)
|
||
{
|
||
ClutterEventSequence *sequence = clutter_event_get_event_sequence (event);
|
||
gfloat event_x, event_y;
|
||
|
||
clutter_event_get_coords (event, &event_x, &event_y);
|
||
|
||
_clutter_input_device_set_coords (device, sequence, event_x, event_y);
|
||
}
|
||
|
||
if (first_event)
|
||
{
|
||
gboolean compressible = event->type == CLUTTER_MOTION ||
|
||
event->type == CLUTTER_TOUCH_UPDATE;
|
||
|
||
if (!compressible)
|
||
{
|
||
_clutter_process_event (event);
|
||
clutter_event_free (event);
|
||
return;
|
||
}
|
||
}
|
||
|
||
g_queue_push_tail (priv->event_queue, event);
|
||
|
||
if (first_event)
|
||
clutter_stage_schedule_update (stage);
|
||
}
|
||
|
||
gboolean
|
||
_clutter_stage_has_queued_events (ClutterStage *stage)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), FALSE);
|
||
|
||
priv = stage->priv;
|
||
|
||
return priv->event_queue->length > 0;
|
||
}
|
||
|
||
void
|
||
_clutter_stage_process_queued_events (ClutterStage *stage)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
GList *events, *l;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
priv = stage->priv;
|
||
|
||
if (priv->event_queue->length == 0)
|
||
return;
|
||
|
||
/* In case the stage gets destroyed during event processing */
|
||
g_object_ref (stage);
|
||
|
||
/* Steal events before starting processing to avoid reentrancy
|
||
* issues */
|
||
events = priv->event_queue->head;
|
||
priv->event_queue->head = NULL;
|
||
priv->event_queue->tail = NULL;
|
||
priv->event_queue->length = 0;
|
||
|
||
for (l = events; l != NULL; l = l->next)
|
||
{
|
||
ClutterEvent *event;
|
||
ClutterEvent *next_event;
|
||
ClutterInputDevice *device;
|
||
ClutterInputDevice *next_device;
|
||
ClutterInputDeviceType device_type;
|
||
gboolean check_device = FALSE;
|
||
|
||
event = l->data;
|
||
next_event = l->next ? l->next->data : NULL;
|
||
|
||
device = clutter_event_get_device (event);
|
||
|
||
if (next_event != NULL)
|
||
next_device = clutter_event_get_device (next_event);
|
||
else
|
||
next_device = NULL;
|
||
|
||
if (device != NULL && next_device != NULL)
|
||
check_device = TRUE;
|
||
|
||
device_type = clutter_input_device_get_device_type (device);
|
||
|
||
/* Skip consecutive motion events coming from the same device,
|
||
* except those of tablet tools, since users of these events
|
||
* want no precision loss.
|
||
*/
|
||
if (priv->throttle_motion_events && next_event != NULL &&
|
||
device_type != CLUTTER_TABLET_DEVICE &&
|
||
device_type != CLUTTER_PEN_DEVICE &&
|
||
device_type != CLUTTER_ERASER_DEVICE)
|
||
{
|
||
if (event->type == CLUTTER_MOTION &&
|
||
(next_event->type == CLUTTER_MOTION ||
|
||
next_event->type == CLUTTER_LEAVE) &&
|
||
(!check_device || (device == next_device)))
|
||
{
|
||
CLUTTER_NOTE (EVENT,
|
||
"Omitting motion event at %d, %d",
|
||
(int) event->motion.x,
|
||
(int) event->motion.y);
|
||
|
||
if (next_event->type == CLUTTER_MOTION)
|
||
{
|
||
ClutterSeat *seat = clutter_input_device_get_seat (device);
|
||
|
||
clutter_seat_compress_motion (seat, next_event, event);
|
||
}
|
||
|
||
goto next_event;
|
||
}
|
||
else if (event->type == CLUTTER_TOUCH_UPDATE &&
|
||
next_event->type == CLUTTER_TOUCH_UPDATE &&
|
||
event->touch.sequence == next_event->touch.sequence &&
|
||
(!check_device || (device == next_device)))
|
||
{
|
||
CLUTTER_NOTE (EVENT,
|
||
"Omitting touch update event at %d, %d",
|
||
(int) event->touch.x,
|
||
(int) event->touch.y);
|
||
goto next_event;
|
||
}
|
||
}
|
||
|
||
_clutter_process_event (event);
|
||
|
||
next_event:
|
||
clutter_event_free (event);
|
||
}
|
||
|
||
g_list_free (events);
|
||
|
||
g_object_unref (stage);
|
||
}
|
||
|
||
void
|
||
clutter_stage_queue_actor_relayout (ClutterStage *stage,
|
||
ClutterActor *actor)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
|
||
if (priv->pending_relayouts == NULL)
|
||
clutter_stage_schedule_update (stage);
|
||
|
||
priv->pending_relayouts = g_slist_prepend (priv->pending_relayouts,
|
||
g_object_ref (actor));
|
||
}
|
||
|
||
void
|
||
clutter_stage_dequeue_actor_relayout (ClutterStage *stage,
|
||
ClutterActor *actor)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
GSList *l;
|
||
|
||
for (l = priv->pending_relayouts; l; l = l->next)
|
||
{
|
||
ClutterActor *relayout_actor = l->data;
|
||
|
||
if (relayout_actor == actor)
|
||
{
|
||
g_object_unref (relayout_actor);
|
||
priv->pending_relayouts =
|
||
g_slist_delete_link (priv->pending_relayouts, l);
|
||
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
clutter_stage_maybe_relayout (ClutterActor *actor)
|
||
{
|
||
ClutterStage *stage = CLUTTER_STAGE (actor);
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
g_autoptr (GSList) stolen_list = NULL;
|
||
GSList *l;
|
||
int count = 0;
|
||
|
||
/* No work to do? Avoid the extraneous debug log messages too. */
|
||
if (priv->pending_relayouts == NULL)
|
||
return;
|
||
|
||
COGL_TRACE_BEGIN_SCOPED (ClutterStageRelayout, "Layout");
|
||
|
||
CLUTTER_NOTE (ACTOR, ">>> Recomputing layout");
|
||
|
||
stolen_list = g_steal_pointer (&priv->pending_relayouts);
|
||
for (l = stolen_list; l; l = l->next)
|
||
{
|
||
g_autoptr (ClutterActor) queued_actor = l->data;
|
||
float x = 0.f;
|
||
float y = 0.f;
|
||
|
||
if (CLUTTER_ACTOR_IN_RELAYOUT (queued_actor)) /* avoid reentrancy */
|
||
continue;
|
||
|
||
if (queued_actor == actor)
|
||
CLUTTER_NOTE (ACTOR, " Deep relayout of stage %s",
|
||
_clutter_actor_get_debug_name (queued_actor));
|
||
else
|
||
CLUTTER_NOTE (ACTOR, " Shallow relayout of actor %s",
|
||
_clutter_actor_get_debug_name (queued_actor));
|
||
|
||
CLUTTER_SET_PRIVATE_FLAGS (queued_actor, CLUTTER_IN_RELAYOUT);
|
||
|
||
clutter_actor_get_fixed_position (queued_actor, &x, &y);
|
||
clutter_actor_allocate_preferred_size (queued_actor, x, y);
|
||
|
||
CLUTTER_UNSET_PRIVATE_FLAGS (queued_actor, CLUTTER_IN_RELAYOUT);
|
||
|
||
count++;
|
||
}
|
||
|
||
CLUTTER_NOTE (ACTOR, "<<< Completed recomputing layout of %d subtrees", count);
|
||
|
||
if (count)
|
||
priv->needs_update_devices = TRUE;
|
||
}
|
||
|
||
GSList *
|
||
clutter_stage_find_updated_devices (ClutterStage *stage)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
ClutterBackend *backend;
|
||
ClutterSeat *seat;
|
||
GSList *updating = NULL;
|
||
const GList *l, *devices;
|
||
graphene_point_t point;
|
||
|
||
if (!priv->needs_update_devices)
|
||
return NULL;
|
||
|
||
priv->needs_update_devices = FALSE;
|
||
|
||
backend = clutter_get_default_backend ();
|
||
seat = clutter_backend_get_default_seat (backend);
|
||
devices = clutter_seat_peek_devices (seat);
|
||
|
||
for (l = devices; l; l = l->next)
|
||
{
|
||
ClutterInputDevice *dev = l->data;
|
||
ClutterStageView *view;
|
||
const cairo_region_t *clip;
|
||
|
||
if (clutter_input_device_get_device_mode (dev) !=
|
||
CLUTTER_INPUT_MODE_LOGICAL)
|
||
continue;
|
||
|
||
switch (clutter_input_device_get_device_type (dev))
|
||
{
|
||
case CLUTTER_POINTER_DEVICE:
|
||
case CLUTTER_TABLET_DEVICE:
|
||
case CLUTTER_PEN_DEVICE:
|
||
case CLUTTER_ERASER_DEVICE:
|
||
case CLUTTER_CURSOR_DEVICE:
|
||
if (!clutter_input_device_get_coords (dev, NULL, &point))
|
||
continue;
|
||
|
||
view = clutter_stage_get_view_at (stage, point.x, point.y);
|
||
if (!view)
|
||
continue;
|
||
|
||
clip = clutter_stage_view_peek_redraw_clip (view);
|
||
if (!clip || cairo_region_contains_point (clip, point.x, point.y))
|
||
updating = g_slist_prepend (updating, dev);
|
||
break;
|
||
default:
|
||
/* Any other devices don't need checking, either because they
|
||
* don't have x/y coordinates, or because they're implicitly
|
||
* grabbed on an actor by default as it's the case of
|
||
* touch(screens).
|
||
*/
|
||
break;
|
||
}
|
||
}
|
||
|
||
return updating;
|
||
}
|
||
|
||
void
|
||
clutter_stage_update_actor_stage_views (ClutterStage *stage)
|
||
{
|
||
ClutterActor *actor = CLUTTER_ACTOR (stage);
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
int phase;
|
||
|
||
COGL_TRACE_BEGIN_SCOPED (ClutterStageUpdateActorStageViews,
|
||
"Actor stage-views");
|
||
|
||
/* If an actor needs an immediate relayout because its resource scale
|
||
* changed, we give it another chance to allocate correctly before
|
||
* the paint.
|
||
*
|
||
* We're doing the whole thing twice and pass the phase to
|
||
* clutter_actor_update_stage_views() to allow actors to detect loops:
|
||
* If the resource scale changes again after the relayout, the new
|
||
* allocation of an actor probably moved the actor onto another stage
|
||
* view, so if an actor sees phase == 1, it can choose a "final" scale.
|
||
*/
|
||
for (phase = 0; phase < 2; phase++)
|
||
{
|
||
clutter_actor_update_stage_views (actor, phase);
|
||
|
||
if (!priv->actor_needs_immediate_relayout)
|
||
break;
|
||
|
||
priv->actor_needs_immediate_relayout = FALSE;
|
||
clutter_stage_maybe_relayout (actor);
|
||
}
|
||
|
||
g_warn_if_fail (!priv->actor_needs_immediate_relayout);
|
||
}
|
||
|
||
void
|
||
clutter_stage_update_devices (ClutterStage *stage,
|
||
GSList *devices)
|
||
{
|
||
GSList *l;
|
||
|
||
COGL_TRACE_BEGIN (ClutterStageUpdateDevices, "UpdateDevices");
|
||
|
||
for (l = devices; l; l = l->next)
|
||
{
|
||
ClutterInputDevice *device = l->data;
|
||
clutter_input_device_update (device, NULL, stage, TRUE,
|
||
CLUTTER_CURRENT_TIME);
|
||
}
|
||
}
|
||
|
||
static void
|
||
clutter_stage_real_queue_relayout (ClutterActor *self)
|
||
{
|
||
ClutterStage *stage = CLUTTER_STAGE (self);
|
||
ClutterActorClass *parent_class;
|
||
|
||
clutter_stage_queue_actor_relayout (stage, self);
|
||
|
||
/* chain up */
|
||
parent_class = CLUTTER_ACTOR_CLASS (clutter_stage_parent_class);
|
||
parent_class->queue_relayout (self);
|
||
}
|
||
|
||
static gboolean
|
||
is_full_stage_redraw_queued (ClutterStage *stage)
|
||
{
|
||
GList *l;
|
||
|
||
for (l = clutter_stage_peek_stage_views (stage); l; l = l->next)
|
||
{
|
||
ClutterStageView *view = l->data;
|
||
|
||
if (!clutter_stage_view_has_full_redraw_clip (view))
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
gboolean
|
||
_clutter_stage_has_full_redraw_queued (ClutterStage *stage)
|
||
{
|
||
if (CLUTTER_ACTOR_IN_DESTRUCTION (stage))
|
||
return FALSE;
|
||
|
||
return is_full_stage_redraw_queued (stage);
|
||
}
|
||
|
||
static void
|
||
setup_ray_for_coordinates (ClutterStage *stage,
|
||
float x,
|
||
float y,
|
||
graphene_point3d_t *point,
|
||
graphene_ray_t *ray)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
graphene_point3d_t camera_position;
|
||
graphene_point3d_t p;
|
||
graphene_vec3_t direction;
|
||
graphene_vec3_t cv;
|
||
graphene_vec3_t v;
|
||
|
||
camera_position = GRAPHENE_POINT3D_INIT_ZERO;
|
||
graphene_vec3_init (&cv,
|
||
camera_position.x,
|
||
camera_position.y,
|
||
camera_position.z);
|
||
|
||
p = GRAPHENE_POINT3D_INIT (x, y, 0.f);
|
||
graphene_matrix_transform_point3d (&priv->view, &p, &p);
|
||
|
||
graphene_vec3_init (&v, p.x, p.y, p.z);
|
||
graphene_vec3_subtract (&v, &cv, &direction);
|
||
graphene_vec3_normalize (&direction, &direction);
|
||
|
||
graphene_ray_init (ray, &camera_position, &direction);
|
||
graphene_point3d_init_from_point (point, &p);
|
||
}
|
||
|
||
static ClutterActor *
|
||
_clutter_stage_do_pick_on_view (ClutterStage *stage,
|
||
float x,
|
||
float y,
|
||
ClutterPickMode mode,
|
||
ClutterStageView *view)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
graphene_point3d_t p;
|
||
graphene_ray_t ray;
|
||
ClutterActor *actor;
|
||
|
||
COGL_TRACE_BEGIN_SCOPED (ClutterStagePickView, "Pick (view)");
|
||
|
||
if (!priv->pick_stack || mode != priv->cached_pick_mode)
|
||
{
|
||
ClutterPickContext *pick_context;
|
||
|
||
_clutter_stage_clear_pick_stack (stage);
|
||
|
||
pick_context = clutter_pick_context_new_for_view (view, mode);
|
||
|
||
clutter_actor_pick (CLUTTER_ACTOR (stage), pick_context);
|
||
priv->pick_stack = clutter_pick_context_steal_stack (pick_context);
|
||
priv->cached_pick_mode = mode;
|
||
|
||
clutter_pick_context_destroy (pick_context);
|
||
}
|
||
|
||
setup_ray_for_coordinates (stage, x, y, &p, &ray);
|
||
|
||
actor = clutter_pick_stack_search_actor (priv->pick_stack, &p, &ray);
|
||
return actor ? actor : CLUTTER_ACTOR (stage);
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_get_view_at: (skip)
|
||
*/
|
||
ClutterStageView *
|
||
clutter_stage_get_view_at (ClutterStage *stage,
|
||
float x,
|
||
float y)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
GList *l;
|
||
|
||
for (l = _clutter_stage_window_get_views (priv->impl); l; l = l->next)
|
||
{
|
||
ClutterStageView *view = l->data;
|
||
cairo_rectangle_int_t view_layout;
|
||
|
||
clutter_stage_view_get_layout (view, &view_layout);
|
||
if (x >= view_layout.x &&
|
||
x < view_layout.x + view_layout.width &&
|
||
y >= view_layout.y &&
|
||
y < view_layout.y + view_layout.height)
|
||
return view;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
ClutterActor *
|
||
_clutter_stage_do_pick (ClutterStage *stage,
|
||
float x,
|
||
float y,
|
||
ClutterPickMode mode)
|
||
{
|
||
ClutterActor *actor = CLUTTER_ACTOR (stage);
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
float stage_width, stage_height;
|
||
ClutterStageView *view = NULL;
|
||
|
||
priv = stage->priv;
|
||
|
||
if (CLUTTER_ACTOR_IN_DESTRUCTION (stage))
|
||
return actor;
|
||
|
||
if (G_UNLIKELY (clutter_pick_debug_flags & CLUTTER_DEBUG_NOP_PICKING))
|
||
return actor;
|
||
|
||
if (G_UNLIKELY (priv->impl == NULL))
|
||
return actor;
|
||
|
||
clutter_actor_get_size (CLUTTER_ACTOR (stage), &stage_width, &stage_height);
|
||
if (x < 0 || x >= stage_width || y < 0 || y >= stage_height)
|
||
return actor;
|
||
|
||
view = clutter_stage_get_view_at (stage, x, y);
|
||
if (view)
|
||
return _clutter_stage_do_pick_on_view (stage, x, y, mode, view);
|
||
|
||
return actor;
|
||
}
|
||
|
||
static void
|
||
clutter_stage_real_apply_transform (ClutterActor *stage,
|
||
graphene_matrix_t *matrix)
|
||
{
|
||
ClutterStagePrivate *priv = CLUTTER_STAGE (stage)->priv;
|
||
|
||
/* FIXME: we probably shouldn't be explicitly resetting the matrix
|
||
* here... */
|
||
graphene_matrix_init_from_matrix (matrix, &priv->view);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_constructed (GObject *gobject)
|
||
{
|
||
ClutterStage *self = CLUTTER_STAGE (gobject);
|
||
ClutterStageManager *stage_manager;
|
||
|
||
stage_manager = clutter_stage_manager_get_default ();
|
||
|
||
/* this will take care to sinking the floating reference */
|
||
_clutter_stage_manager_add_stage (stage_manager, self);
|
||
|
||
/* if this stage has been created on a backend that does not
|
||
* support multiple stages then it becomes the default stage
|
||
* as well; any other attempt at creating a ClutterStage will
|
||
* fail.
|
||
*/
|
||
if (!clutter_feature_available (CLUTTER_FEATURE_STAGE_MULTIPLE))
|
||
{
|
||
if (G_UNLIKELY (clutter_stage_manager_get_default_stage (stage_manager) != NULL))
|
||
{
|
||
g_error ("Unable to create another stage: the backend of "
|
||
"type '%s' does not support multiple stages. Use "
|
||
"clutter_stage_manager_get_default_stage() instead "
|
||
"to access the stage singleton.",
|
||
G_OBJECT_TYPE_NAME (clutter_get_default_backend ()));
|
||
}
|
||
|
||
_clutter_stage_manager_set_default_stage (stage_manager, self);
|
||
}
|
||
|
||
G_OBJECT_CLASS (clutter_stage_parent_class)->constructed (gobject);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_set_property (GObject *object,
|
||
guint prop_id,
|
||
const GValue *value,
|
||
GParamSpec *pspec)
|
||
{
|
||
ClutterStage *stage = CLUTTER_STAGE (object);
|
||
|
||
switch (prop_id)
|
||
{
|
||
case PROP_TITLE:
|
||
clutter_stage_set_title (stage, g_value_get_string (value));
|
||
break;
|
||
|
||
case PROP_KEY_FOCUS:
|
||
clutter_stage_set_key_focus (stage, g_value_get_object (value));
|
||
break;
|
||
|
||
default:
|
||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
clutter_stage_get_property (GObject *gobject,
|
||
guint prop_id,
|
||
GValue *value,
|
||
GParamSpec *pspec)
|
||
{
|
||
ClutterStagePrivate *priv = CLUTTER_STAGE (gobject)->priv;
|
||
|
||
switch (prop_id)
|
||
{
|
||
case PROP_PERSPECTIVE:
|
||
g_value_set_boxed (value, &priv->perspective);
|
||
break;
|
||
|
||
case PROP_TITLE:
|
||
g_value_set_string (value, priv->title);
|
||
break;
|
||
|
||
case PROP_KEY_FOCUS:
|
||
g_value_set_object (value, priv->key_focused_actor);
|
||
break;
|
||
|
||
default:
|
||
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
clutter_stage_dispose (GObject *object)
|
||
{
|
||
ClutterStage *stage = CLUTTER_STAGE (object);
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
ClutterStageManager *stage_manager;
|
||
|
||
clutter_actor_hide (CLUTTER_ACTOR (object));
|
||
|
||
_clutter_clear_events_queue ();
|
||
|
||
if (priv->impl != NULL)
|
||
{
|
||
CLUTTER_NOTE (BACKEND, "Disposing of the stage implementation");
|
||
|
||
if (CLUTTER_ACTOR_IS_REALIZED (object))
|
||
_clutter_stage_window_unrealize (priv->impl);
|
||
|
||
g_object_unref (priv->impl);
|
||
priv->impl = NULL;
|
||
}
|
||
|
||
clutter_actor_destroy_all_children (CLUTTER_ACTOR (object));
|
||
|
||
g_hash_table_remove_all (priv->pending_queue_redraws);
|
||
|
||
g_slist_free_full (priv->pending_relayouts,
|
||
(GDestroyNotify) g_object_unref);
|
||
priv->pending_relayouts = NULL;
|
||
|
||
/* this will release the reference on the stage */
|
||
stage_manager = clutter_stage_manager_get_default ();
|
||
_clutter_stage_manager_remove_stage (stage_manager, stage);
|
||
|
||
G_OBJECT_CLASS (clutter_stage_parent_class)->dispose (object);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_finalize (GObject *object)
|
||
{
|
||
ClutterStage *stage = CLUTTER_STAGE (object);
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
|
||
g_queue_foreach (priv->event_queue, (GFunc) clutter_event_free, NULL);
|
||
g_queue_free (priv->event_queue);
|
||
|
||
g_free (priv->title);
|
||
|
||
g_array_free (priv->paint_volume_stack, TRUE);
|
||
|
||
_clutter_stage_clear_pick_stack (stage);
|
||
|
||
if (priv->fps_timer != NULL)
|
||
g_timer_destroy (priv->fps_timer);
|
||
|
||
G_OBJECT_CLASS (clutter_stage_parent_class)->finalize (object);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_real_paint_view (ClutterStage *stage,
|
||
ClutterStageView *view,
|
||
const cairo_region_t *redraw_clip)
|
||
{
|
||
clutter_stage_do_paint_view (stage, view, redraw_clip);
|
||
}
|
||
|
||
static void
|
||
clutter_stage_class_init (ClutterStageClass *klass)
|
||
{
|
||
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
||
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
|
||
|
||
gobject_class->constructed = clutter_stage_constructed;
|
||
gobject_class->set_property = clutter_stage_set_property;
|
||
gobject_class->get_property = clutter_stage_get_property;
|
||
gobject_class->dispose = clutter_stage_dispose;
|
||
gobject_class->finalize = clutter_stage_finalize;
|
||
|
||
actor_class->allocate = clutter_stage_allocate;
|
||
actor_class->get_preferred_width = clutter_stage_get_preferred_width;
|
||
actor_class->get_preferred_height = clutter_stage_get_preferred_height;
|
||
actor_class->get_paint_volume = clutter_stage_get_paint_volume;
|
||
actor_class->realize = clutter_stage_realize;
|
||
actor_class->unrealize = clutter_stage_unrealize;
|
||
actor_class->show = clutter_stage_show;
|
||
actor_class->hide = clutter_stage_hide;
|
||
actor_class->hide_all = clutter_stage_hide_all;
|
||
actor_class->queue_relayout = clutter_stage_real_queue_relayout;
|
||
actor_class->apply_transform = clutter_stage_real_apply_transform;
|
||
|
||
klass->paint_view = clutter_stage_real_paint_view;
|
||
|
||
/**
|
||
* ClutterStage:perspective:
|
||
*
|
||
* The parameters used for the perspective projection from 3D
|
||
* coordinates to 2D
|
||
*
|
||
* Since: 0.8
|
||
*/
|
||
obj_props[PROP_PERSPECTIVE] =
|
||
g_param_spec_boxed ("perspective",
|
||
P_("Perspective"),
|
||
P_("Perspective projection parameters"),
|
||
CLUTTER_TYPE_PERSPECTIVE,
|
||
CLUTTER_PARAM_READABLE);
|
||
|
||
/**
|
||
* ClutterStage:title:
|
||
*
|
||
* The stage's title - usually displayed in stage windows title decorations.
|
||
*
|
||
* Since: 0.4
|
||
*/
|
||
obj_props[PROP_TITLE] =
|
||
g_param_spec_string ("title",
|
||
P_("Title"),
|
||
P_("Stage Title"),
|
||
NULL,
|
||
CLUTTER_PARAM_READWRITE);
|
||
|
||
/**
|
||
* ClutterStage:key-focus:
|
||
*
|
||
* The #ClutterActor that will receive key events from the underlying
|
||
* windowing system.
|
||
*
|
||
* If %NULL, the #ClutterStage will receive the events.
|
||
*
|
||
* Since: 1.2
|
||
*/
|
||
obj_props[PROP_KEY_FOCUS] =
|
||
g_param_spec_object ("key-focus",
|
||
P_("Key Focus"),
|
||
P_("The currently key focused actor"),
|
||
CLUTTER_TYPE_ACTOR,
|
||
CLUTTER_PARAM_READWRITE);
|
||
|
||
g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
|
||
|
||
/**
|
||
* ClutterStage::activate:
|
||
* @stage: the stage which was activated
|
||
*
|
||
* The ::activate signal is emitted when the stage receives key focus
|
||
* from the underlying window system.
|
||
*
|
||
* Since: 0.6
|
||
*/
|
||
stage_signals[ACTIVATE] =
|
||
g_signal_new (I_("activate"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
G_STRUCT_OFFSET (ClutterStageClass, activate),
|
||
NULL, NULL, NULL,
|
||
G_TYPE_NONE, 0);
|
||
/**
|
||
* ClutterStage::deactivate:
|
||
* @stage: the stage which was deactivated
|
||
*
|
||
* The ::deactivate signal is emitted when the stage loses key focus
|
||
* from the underlying window system.
|
||
*
|
||
* Since: 0.6
|
||
*/
|
||
stage_signals[DEACTIVATE] =
|
||
g_signal_new (I_("deactivate"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
G_STRUCT_OFFSET (ClutterStageClass, deactivate),
|
||
NULL, NULL, NULL,
|
||
G_TYPE_NONE, 0);
|
||
|
||
/**
|
||
* ClutterStage::before-update:
|
||
* @stage: the #ClutterStage
|
||
* @view: a #ClutterStageView
|
||
*/
|
||
stage_signals[BEFORE_UPDATE] =
|
||
g_signal_new (I_("before-update"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
0,
|
||
NULL, NULL, NULL,
|
||
G_TYPE_NONE, 1,
|
||
CLUTTER_TYPE_STAGE_VIEW);
|
||
|
||
/**
|
||
* ClutterStage::before-paint:
|
||
* @stage: the stage that received the event
|
||
* @view: a #ClutterStageView
|
||
*
|
||
* The ::before-paint signal is emitted before the stage is painted.
|
||
*/
|
||
stage_signals[BEFORE_PAINT] =
|
||
g_signal_new (I_("before-paint"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
G_STRUCT_OFFSET (ClutterStageClass, before_paint),
|
||
NULL, NULL, NULL,
|
||
G_TYPE_NONE, 1,
|
||
CLUTTER_TYPE_STAGE_VIEW);
|
||
/**
|
||
* ClutterStage::after-paint:
|
||
* @stage: the stage that received the event
|
||
* @view: a #ClutterStageView
|
||
*
|
||
* The ::after-paint signal is emitted after the stage is painted,
|
||
* but before the results are displayed on the screen.
|
||
*
|
||
* Since: 1.20
|
||
*/
|
||
stage_signals[AFTER_PAINT] =
|
||
g_signal_new (I_("after-paint"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
0, /* no corresponding vfunc */
|
||
NULL, NULL, NULL,
|
||
G_TYPE_NONE, 1,
|
||
CLUTTER_TYPE_STAGE_VIEW);
|
||
|
||
/**
|
||
* ClutterStage::after-update:
|
||
* @stage: the #ClutterStage
|
||
* @view: a #ClutterStageView
|
||
*/
|
||
stage_signals[AFTER_UPDATE] =
|
||
g_signal_new (I_("after-update"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
0,
|
||
NULL, NULL, NULL,
|
||
G_TYPE_NONE, 1,
|
||
CLUTTER_TYPE_STAGE_VIEW);
|
||
|
||
/**
|
||
* ClutterStage::paint-view:
|
||
* @stage: the stage that received the event
|
||
* @view: a #ClutterStageView
|
||
* @redraw_clip: a #cairo_region_t with the redraw clip
|
||
*
|
||
* The ::paint-view signal is emitted before a #ClutterStageView is being
|
||
* painted.
|
||
*
|
||
* The view is painted in the default handler. Hence, if you want to perform
|
||
* some action after the view is painted, like reading the contents of the
|
||
* framebuffer, use g_signal_connect_after() or pass %G_CONNECT_AFTER.
|
||
*/
|
||
stage_signals[PAINT_VIEW] =
|
||
g_signal_new (I_("paint-view"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
G_STRUCT_OFFSET (ClutterStageClass, paint_view),
|
||
NULL, NULL, NULL,
|
||
G_TYPE_NONE, 2,
|
||
CLUTTER_TYPE_STAGE_VIEW,
|
||
CAIRO_GOBJECT_TYPE_REGION);
|
||
|
||
/**
|
||
* ClutterStage::presented: (skip)
|
||
* @stage: the stage that received the event
|
||
* @view: the #ClutterStageView presented
|
||
* @frame_info: a #ClutterFrameInfo
|
||
*
|
||
* Signals that the #ClutterStage was presented on the screen to the user.
|
||
*/
|
||
stage_signals[PRESENTED] =
|
||
g_signal_new (I_("presented"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
0,
|
||
NULL, NULL, NULL,
|
||
G_TYPE_NONE, 2,
|
||
CLUTTER_TYPE_STAGE_VIEW,
|
||
G_TYPE_POINTER);
|
||
|
||
/**
|
||
* ClutterStage::gl-video-memory-purged: (skip)
|
||
* @stage: the stage that received the event
|
||
*
|
||
* Signals that the underlying GL driver has had its texture memory purged
|
||
* so anything presently held in texture memory is now invalidated, and
|
||
* likely corrupt. It needs redrawing.
|
||
*/
|
||
stage_signals[GL_VIDEO_MEMORY_PURGED] =
|
||
g_signal_new (I_("gl-video-memory-purged"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
0,
|
||
NULL, NULL, NULL,
|
||
G_TYPE_NONE, 0);
|
||
|
||
klass->activate = clutter_stage_real_activate;
|
||
klass->deactivate = clutter_stage_real_deactivate;
|
||
}
|
||
|
||
static void
|
||
clutter_stage_notify_min_size (ClutterStage *self)
|
||
{
|
||
self->priv->min_size_changed = TRUE;
|
||
}
|
||
|
||
static void
|
||
clutter_stage_init (ClutterStage *self)
|
||
{
|
||
cairo_rectangle_int_t geom = { 0, };
|
||
ClutterStagePrivate *priv;
|
||
ClutterStageWindow *impl;
|
||
ClutterBackend *backend;
|
||
GError *error;
|
||
|
||
/* a stage is a top-level object */
|
||
CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_IS_TOPLEVEL);
|
||
|
||
self->priv = priv = clutter_stage_get_instance_private (self);
|
||
|
||
CLUTTER_NOTE (BACKEND, "Creating stage from the default backend");
|
||
backend = clutter_get_default_backend ();
|
||
|
||
error = NULL;
|
||
impl = _clutter_backend_create_stage (backend, self, &error);
|
||
|
||
if (G_LIKELY (impl != NULL))
|
||
{
|
||
_clutter_stage_set_window (self, impl);
|
||
_clutter_stage_window_get_geometry (priv->impl, &geom);
|
||
}
|
||
else
|
||
{
|
||
if (error != NULL)
|
||
{
|
||
g_critical ("Unable to create a new stage implementation: %s",
|
||
error->message);
|
||
g_error_free (error);
|
||
}
|
||
else
|
||
g_critical ("Unable to create a new stage implementation.");
|
||
}
|
||
|
||
priv->event_queue = g_queue_new ();
|
||
|
||
priv->throttle_motion_events = TRUE;
|
||
priv->min_size_changed = FALSE;
|
||
priv->sync_delay = -1;
|
||
priv->motion_events_enabled = TRUE;
|
||
|
||
clutter_actor_set_background_color (CLUTTER_ACTOR (self),
|
||
&default_stage_color);
|
||
|
||
clutter_stage_queue_actor_relayout (self, CLUTTER_ACTOR (self));
|
||
|
||
clutter_actor_set_reactive (CLUTTER_ACTOR (self), TRUE);
|
||
clutter_stage_set_title (self, g_get_prgname ());
|
||
clutter_stage_set_key_focus (self, NULL);
|
||
|
||
g_signal_connect (self, "notify::min-width",
|
||
G_CALLBACK (clutter_stage_notify_min_size), NULL);
|
||
g_signal_connect (self, "notify::min-height",
|
||
G_CALLBACK (clutter_stage_notify_min_size), NULL);
|
||
|
||
clutter_stage_set_viewport (self, geom.width, geom.height);
|
||
|
||
priv->pending_queue_redraws =
|
||
g_hash_table_new_full (NULL, NULL,
|
||
g_object_unref,
|
||
(GDestroyNotify) free_queue_redraw_entry);
|
||
|
||
priv->paint_volume_stack =
|
||
g_array_new (FALSE, FALSE, sizeof (ClutterPaintVolume));
|
||
|
||
priv->cached_pick_mode = CLUTTER_PICK_NONE;
|
||
}
|
||
|
||
static void
|
||
clutter_stage_set_perspective (ClutterStage *stage,
|
||
ClutterPerspective *perspective)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
|
||
if (priv->perspective.fovy == perspective->fovy &&
|
||
priv->perspective.aspect == perspective->aspect &&
|
||
priv->perspective.z_near == perspective->z_near &&
|
||
priv->perspective.z_far == perspective->z_far)
|
||
return;
|
||
|
||
priv->perspective = *perspective;
|
||
|
||
graphene_matrix_init_perspective (&priv->projection,
|
||
priv->perspective.fovy,
|
||
priv->perspective.aspect,
|
||
priv->perspective.z_near,
|
||
priv->perspective.z_far);
|
||
graphene_matrix_inverse (&priv->projection,
|
||
&priv->inverse_projection);
|
||
|
||
_clutter_stage_dirty_projection (stage);
|
||
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_get_perspective:
|
||
* @stage: A #ClutterStage
|
||
* @perspective: (out caller-allocates) (allow-none): return location for a
|
||
* #ClutterPerspective
|
||
*
|
||
* Retrieves the stage perspective.
|
||
*/
|
||
void
|
||
clutter_stage_get_perspective (ClutterStage *stage,
|
||
ClutterPerspective *perspective)
|
||
{
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
g_return_if_fail (perspective != NULL);
|
||
|
||
*perspective = stage->priv->perspective;
|
||
}
|
||
|
||
/*
|
||
* clutter_stage_get_projection_matrix:
|
||
* @stage: A #ClutterStage
|
||
* @projection: return location for a #graphene_matrix_t representing the
|
||
* perspective projection applied to actors on the given
|
||
* @stage.
|
||
*
|
||
* Retrieves the @stage's projection matrix. This is derived from the
|
||
* current perspective.
|
||
*
|
||
* Since: 1.6
|
||
*/
|
||
void
|
||
_clutter_stage_get_projection_matrix (ClutterStage *stage,
|
||
graphene_matrix_t *projection)
|
||
{
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
g_return_if_fail (projection != NULL);
|
||
|
||
*projection = stage->priv->projection;
|
||
}
|
||
|
||
/* This simply provides a simple mechanism for us to ensure that
|
||
* the projection matrix gets re-asserted before painting.
|
||
*
|
||
* This is used when switching between multiple stages */
|
||
void
|
||
_clutter_stage_dirty_projection (ClutterStage *stage)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
GList *l;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
priv = stage->priv;
|
||
|
||
for (l = _clutter_stage_window_get_views (priv->impl); l; l = l->next)
|
||
{
|
||
ClutterStageView *view = l->data;
|
||
|
||
clutter_stage_view_invalidate_projection (view);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* clutter_stage_set_viewport:
|
||
* @stage: A #ClutterStage
|
||
* @width: The width to render the stage at, in window coordinates
|
||
* @height: The height to render the stage at, in window coordinates
|
||
*
|
||
* Sets the stage viewport. The viewport defines a final scale and
|
||
* translation of your rendered stage and actors. This lets you render
|
||
* your stage into a subregion of the stage window or you could use it to
|
||
* pan a subregion of the stage if your stage window is smaller then
|
||
* the stage. (XXX: currently this isn't possible)
|
||
*
|
||
* Unlike a scale and translation done using the modelview matrix this
|
||
* is done after everything has had perspective projection applied, so
|
||
* for example if you were to pan across a subregion of the stage using
|
||
* the viewport then you would not see a change in perspective for the
|
||
* actors on the stage.
|
||
*
|
||
* Normally the stage viewport will automatically track the size of the
|
||
* stage window with no offset so the stage will fill your window. This
|
||
* behaviour can be changed with the "viewport-mimics-window" property
|
||
* which will automatically be set to FALSE if you use this API. If
|
||
* you want to revert to the original behaviour then you should set
|
||
* this property back to %TRUE using
|
||
* clutter_stage_set_viewport_mimics_window().
|
||
* (XXX: If we were to make this API public then we might want to do
|
||
* add that property.)
|
||
*
|
||
* Note: currently this interface only support integer precision
|
||
* offsets and sizes for viewports but the interface takes floats because
|
||
* OpenGL 4.0 has introduced floating point viewports which we might
|
||
* want to expose via this API eventually.
|
||
*
|
||
* Since: 1.6
|
||
*/
|
||
static void
|
||
clutter_stage_set_viewport (ClutterStage *stage,
|
||
float width,
|
||
float height)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
float x, y;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
priv = stage->priv;
|
||
|
||
x = 0.f;
|
||
y = 0.f;
|
||
width = roundf (width);
|
||
height = roundf (height);
|
||
|
||
if (x == priv->viewport[0] &&
|
||
y == priv->viewport[1] &&
|
||
width == priv->viewport[2] &&
|
||
height == priv->viewport[3])
|
||
return;
|
||
|
||
priv->viewport[0] = x;
|
||
priv->viewport[1] = y;
|
||
priv->viewport[2] = width;
|
||
priv->viewport[3] = height;
|
||
|
||
clutter_stage_update_view_perspective (stage);
|
||
_clutter_stage_dirty_viewport (stage);
|
||
|
||
queue_full_redraw (stage);
|
||
}
|
||
|
||
/* This simply provides a simple mechanism for us to ensure that
|
||
* the viewport gets re-asserted before next painting.
|
||
*
|
||
* This is used when switching between multiple stages */
|
||
void
|
||
_clutter_stage_dirty_viewport (ClutterStage *stage)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
GList *l;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
priv = stage->priv;
|
||
|
||
for (l = _clutter_stage_window_get_views (priv->impl); l; l = l->next)
|
||
{
|
||
ClutterStageView *view = l->data;
|
||
|
||
clutter_stage_view_invalidate_viewport (view);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* clutter_stage_get_viewport:
|
||
* @stage: A #ClutterStage
|
||
* @x: A location for the X position where the stage is rendered,
|
||
* in window coordinates.
|
||
* @y: A location for the Y position where the stage is rendered,
|
||
* in window coordinates.
|
||
* @width: A location for the width the stage is rendered at,
|
||
* in window coordinates.
|
||
* @height: A location for the height the stage is rendered at,
|
||
* in window coordinates.
|
||
*
|
||
* Returns the viewport offset and size set using
|
||
* clutter_stage_set_viewport() or if the "viewport-mimics-window" property
|
||
* is TRUE then @x and @y will be set to 0 and @width and @height will equal
|
||
* the width if the stage window.
|
||
*
|
||
* Since: 1.6
|
||
*/
|
||
void
|
||
_clutter_stage_get_viewport (ClutterStage *stage,
|
||
float *x,
|
||
float *y,
|
||
float *width,
|
||
float *height)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
priv = stage->priv;
|
||
|
||
*x = priv->viewport[0];
|
||
*y = priv->viewport[1];
|
||
*width = priv->viewport[2];
|
||
*height = priv->viewport[3];
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_read_pixels:
|
||
* @stage: A #ClutterStage
|
||
* @x: x coordinate of the first pixel that is read from stage
|
||
* @y: y coordinate of the first pixel that is read from stage
|
||
* @width: Width dimension of pixels to be read, or -1 for the
|
||
* entire stage width
|
||
* @height: Height dimension of pixels to be read, or -1 for the
|
||
* entire stage height
|
||
*
|
||
* Makes a screenshot of the stage in RGBA 8bit data, returns a
|
||
* linear buffer with @width * 4 as rowstride.
|
||
*
|
||
* The alpha data contained in the returned buffer is driver-dependent,
|
||
* and not guaranteed to hold any sensible value.
|
||
*
|
||
* Return value: (transfer full) (array): a pointer to newly allocated memory with the buffer
|
||
* or %NULL if the read failed. Use g_free() on the returned data
|
||
* to release the resources it has allocated.
|
||
*/
|
||
guchar *
|
||
clutter_stage_read_pixels (ClutterStage *stage,
|
||
gint x,
|
||
gint y,
|
||
gint width,
|
||
gint height)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
ClutterActorBox box;
|
||
GList *l;
|
||
ClutterStageView *view;
|
||
cairo_region_t *clip;
|
||
cairo_rectangle_int_t clip_rect;
|
||
CoglFramebuffer *framebuffer;
|
||
float view_scale;
|
||
float pixel_width;
|
||
float pixel_height;
|
||
uint8_t *pixels;
|
||
|
||
COGL_TRACE_BEGIN_SCOPED (ClutterStageReadPixels, "Read Pixels");
|
||
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
|
||
|
||
priv = stage->priv;
|
||
|
||
clutter_actor_get_allocation_box (CLUTTER_ACTOR (stage), &box);
|
||
|
||
if (width < 0)
|
||
width = ceilf (box.x2 - box.x1);
|
||
|
||
if (height < 0)
|
||
height = ceilf (box.y2 - box.y1);
|
||
|
||
l = _clutter_stage_window_get_views (priv->impl);
|
||
|
||
if (!l)
|
||
return NULL;
|
||
|
||
/* XXX: We only read the first view. Needs different API for multi view screen
|
||
* capture. */
|
||
view = l->data;
|
||
|
||
clutter_stage_view_get_layout (view, &clip_rect);
|
||
clip = cairo_region_create_rectangle (&clip_rect);
|
||
cairo_region_intersect_rectangle (clip,
|
||
&(cairo_rectangle_int_t) {
|
||
.x = x,
|
||
.y = y,
|
||
.width = width,
|
||
.height = height,
|
||
});
|
||
cairo_region_get_extents (clip, &clip_rect);
|
||
|
||
if (clip_rect.width == 0 || clip_rect.height == 0)
|
||
{
|
||
cairo_region_destroy (clip);
|
||
return NULL;
|
||
}
|
||
|
||
framebuffer = clutter_stage_view_get_framebuffer (view);
|
||
clutter_stage_do_paint_view (stage, view, clip);
|
||
|
||
cairo_region_destroy (clip);
|
||
|
||
view_scale = clutter_stage_view_get_scale (view);
|
||
pixel_width = roundf (clip_rect.width * view_scale);
|
||
pixel_height = roundf (clip_rect.height * view_scale);
|
||
|
||
pixels = g_malloc0 (pixel_width * pixel_height * 4);
|
||
cogl_framebuffer_read_pixels (framebuffer,
|
||
clip_rect.x * view_scale,
|
||
clip_rect.y * view_scale,
|
||
pixel_width, pixel_height,
|
||
COGL_PIXEL_FORMAT_RGBA_8888,
|
||
pixels);
|
||
|
||
return pixels;
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_get_actor_at_pos:
|
||
* @stage: a #ClutterStage
|
||
* @pick_mode: how the scene graph should be painted
|
||
* @x: X coordinate to check
|
||
* @y: Y coordinate to check
|
||
*
|
||
* Checks the scene at the coordinates @x and @y and returns a pointer
|
||
* to the #ClutterActor at those coordinates. The result is the actor which
|
||
* would be at the specified location on the next redraw, and is not
|
||
* necessarily that which was there on the previous redraw. This allows the
|
||
* function to perform chronologically correctly after any queued changes to
|
||
* the scene, and even if nothing has been drawn.
|
||
*
|
||
* By using @pick_mode it is possible to control which actors will be
|
||
* painted and thus available.
|
||
*
|
||
* Return value: (transfer none): the actor at the specified coordinates,
|
||
* if any
|
||
*/
|
||
ClutterActor *
|
||
clutter_stage_get_actor_at_pos (ClutterStage *stage,
|
||
ClutterPickMode pick_mode,
|
||
float x,
|
||
float y)
|
||
{
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
|
||
|
||
return _clutter_stage_do_pick (stage, x, y, pick_mode);
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_event:
|
||
* @stage: a #ClutterStage
|
||
* @event: a #ClutterEvent
|
||
*
|
||
* This function is used to emit an event on the main stage.
|
||
*
|
||
* You should rarely need to use this function, except for
|
||
* synthetised events.
|
||
*
|
||
* Return value: the return value from the signal emission
|
||
*
|
||
* Since: 0.4
|
||
*/
|
||
gboolean
|
||
clutter_stage_event (ClutterStage *stage,
|
||
ClutterEvent *event)
|
||
{
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), FALSE);
|
||
g_return_val_if_fail (event != NULL, FALSE);
|
||
|
||
if (event->type != CLUTTER_STAGE_STATE)
|
||
return FALSE;
|
||
|
||
/* emit raw event */
|
||
if (clutter_actor_event (CLUTTER_ACTOR (stage), event, FALSE))
|
||
return TRUE;
|
||
|
||
if (event->stage_state.changed_mask & CLUTTER_STAGE_STATE_ACTIVATED)
|
||
{
|
||
if (event->stage_state.new_state & CLUTTER_STAGE_STATE_ACTIVATED)
|
||
g_signal_emit (stage, stage_signals[ACTIVATE], 0);
|
||
else
|
||
g_signal_emit (stage, stage_signals[DEACTIVATE], 0);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_set_title:
|
||
* @stage: A #ClutterStage
|
||
* @title: A utf8 string for the stage windows title.
|
||
*
|
||
* Sets the stage title.
|
||
*
|
||
* Since: 0.4
|
||
**/
|
||
void
|
||
clutter_stage_set_title (ClutterStage *stage,
|
||
const gchar *title)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
ClutterStageWindow *impl;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
priv = stage->priv;
|
||
|
||
g_free (priv->title);
|
||
priv->title = g_strdup (title);
|
||
|
||
impl = CLUTTER_STAGE_WINDOW (priv->impl);
|
||
if (CLUTTER_STAGE_WINDOW_GET_IFACE(impl)->set_title != NULL)
|
||
CLUTTER_STAGE_WINDOW_GET_IFACE (impl)->set_title (impl, priv->title);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (stage), obj_props[PROP_TITLE]);
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_get_title:
|
||
* @stage: A #ClutterStage
|
||
*
|
||
* Gets the stage title.
|
||
*
|
||
* Return value: pointer to the title string for the stage. The
|
||
* returned string is owned by the actor and should not
|
||
* be modified or freed.
|
||
*
|
||
* Since: 0.4
|
||
**/
|
||
const gchar *
|
||
clutter_stage_get_title (ClutterStage *stage)
|
||
{
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
|
||
|
||
return stage->priv->title;
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_set_key_focus:
|
||
* @stage: the #ClutterStage
|
||
* @actor: (allow-none): the actor to set key focus to, or %NULL
|
||
*
|
||
* Sets the key focus on @actor. An actor with key focus will receive
|
||
* all the key events. If @actor is %NULL, the stage will receive
|
||
* focus.
|
||
*
|
||
* Since: 0.6
|
||
*/
|
||
void
|
||
clutter_stage_set_key_focus (ClutterStage *stage,
|
||
ClutterActor *actor)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
g_return_if_fail (actor == NULL || CLUTTER_IS_ACTOR (actor));
|
||
|
||
priv = stage->priv;
|
||
|
||
/* normalize the key focus. NULL == stage */
|
||
if (actor == CLUTTER_ACTOR (stage))
|
||
actor = NULL;
|
||
|
||
/* avoid emitting signals and notifications if we're setting the same
|
||
* actor as the key focus
|
||
*/
|
||
if (priv->key_focused_actor == actor)
|
||
return;
|
||
|
||
if (priv->key_focused_actor != NULL)
|
||
{
|
||
ClutterActor *old_focused_actor;
|
||
|
||
old_focused_actor = priv->key_focused_actor;
|
||
|
||
/* set key_focused_actor to NULL before emitting the signal or someone
|
||
* might hide the previously focused actor in the signal handler
|
||
*/
|
||
priv->key_focused_actor = NULL;
|
||
|
||
_clutter_actor_set_has_key_focus (old_focused_actor, FALSE);
|
||
}
|
||
else
|
||
_clutter_actor_set_has_key_focus (CLUTTER_ACTOR (stage), FALSE);
|
||
|
||
/* Note, if someone changes key focus in focus-out signal handler we'd be
|
||
* overriding the latter call below moving the focus where it was originally
|
||
* intended. The order of events would be:
|
||
* 1st focus-out, 2nd focus-out (on stage), 2nd focus-in, 1st focus-in
|
||
*/
|
||
if (actor != NULL)
|
||
{
|
||
priv->key_focused_actor = actor;
|
||
_clutter_actor_set_has_key_focus (actor, TRUE);
|
||
}
|
||
else
|
||
_clutter_actor_set_has_key_focus (CLUTTER_ACTOR (stage), TRUE);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (stage), obj_props[PROP_KEY_FOCUS]);
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_get_key_focus:
|
||
* @stage: the #ClutterStage
|
||
*
|
||
* Retrieves the actor that is currently under key focus.
|
||
*
|
||
* Return value: (transfer none): the actor with key focus, or the stage
|
||
*
|
||
* Since: 0.6
|
||
*/
|
||
ClutterActor *
|
||
clutter_stage_get_key_focus (ClutterStage *stage)
|
||
{
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
|
||
|
||
if (stage->priv->key_focused_actor)
|
||
return stage->priv->key_focused_actor;
|
||
|
||
return CLUTTER_ACTOR (stage);
|
||
}
|
||
|
||
/*** Perspective boxed type ******/
|
||
|
||
static gpointer
|
||
clutter_perspective_copy (gpointer data)
|
||
{
|
||
if (G_LIKELY (data))
|
||
return g_slice_dup (ClutterPerspective, data);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static void
|
||
clutter_perspective_free (gpointer data)
|
||
{
|
||
if (G_LIKELY (data))
|
||
g_slice_free (ClutterPerspective, data);
|
||
}
|
||
|
||
G_DEFINE_BOXED_TYPE (ClutterPerspective, clutter_perspective,
|
||
clutter_perspective_copy,
|
||
clutter_perspective_free);
|
||
|
||
/**
|
||
* clutter_stage_ensure_viewport:
|
||
* @stage: a #ClutterStage
|
||
*
|
||
* Ensures that the GL viewport is updated with the current
|
||
* stage window size.
|
||
*
|
||
* This function will queue a redraw of @stage.
|
||
*
|
||
* This function should not be called by applications; it is used
|
||
* when embedding a #ClutterStage into a toolkit with another
|
||
* windowing system, like GTK+.
|
||
*
|
||
* Since: 1.0
|
||
*/
|
||
void
|
||
clutter_stage_ensure_viewport (ClutterStage *stage)
|
||
{
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
_clutter_stage_dirty_viewport (stage);
|
||
|
||
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
|
||
}
|
||
|
||
# define _DEG_TO_RAD(d) ((d) * ((float) G_PI / 180.0f))
|
||
|
||
/* This calculates a distance into the view frustum to position the
|
||
* stage so there is a decent amount of space to position geometry
|
||
* between the stage and the near clipping plane.
|
||
*
|
||
* Some awkward issues with this problem are:
|
||
* - It's not possible to have a gap as large as the stage size with
|
||
* a fov > 53° which is basically always the case since the default
|
||
* fov is 60°.
|
||
* - This can be deduced if you consider that this requires a
|
||
* triangle as wide as it is deep to fit in the frustum in front
|
||
* of the z_near plane. That triangle will always have an angle
|
||
* of 53.13° at the point sitting on the z_near plane, but if the
|
||
* frustum has a wider fov angle the left/right clipping planes
|
||
* can never converge with the two corners of our triangle no
|
||
* matter what size the triangle has.
|
||
* - With a fov > 53° there is a trade off between maximizing the gap
|
||
* size relative to the stage size but not losing depth precision.
|
||
* - Perhaps ideally we wouldn't just consider the fov on the y-axis
|
||
* that is usually used to define a perspective, we would consider
|
||
* the fov of the axis with the largest stage size so the gap would
|
||
* accommodate that size best.
|
||
*
|
||
* After going around in circles a few times with how to handle these
|
||
* issues, we decided in the end to go for the simplest solution to
|
||
* start with instead of an elaborate function that handles arbitrary
|
||
* fov angles that we currently have no use-case for.
|
||
*
|
||
* The solution assumes a fovy of 60° and for that case gives a gap
|
||
* that's 85% of the stage height. We can consider more elaborate
|
||
* functions if necessary later.
|
||
*
|
||
* One guide we had to steer the gap size we support is the
|
||
* interactive test, test-texture-quality which expects to animate an
|
||
* actor to +400 on the z axis with a stage size of 640x480. A gap
|
||
* that's 85% of the stage height gives a gap of 408 in that case.
|
||
*/
|
||
static float
|
||
calculate_z_translation (float z_near)
|
||
{
|
||
/* This solution uses fairly basic trigonometry, but is seems worth
|
||
* clarifying the particular geometry we are looking at in-case
|
||
* anyone wants to develop this further later. Not sure how well an
|
||
* ascii diagram is going to work :-)
|
||
*
|
||
* |--- stage_height ---|
|
||
* | stage line |
|
||
* ╲━━━━━━━━━━━━━━━━━━━━━╱------------
|
||
* ╲. (2) │ .╱ | |
|
||
* C ╲ . │ . ╱ gap| |
|
||
* =0.5°╲ . a │ . ╱ | |
|
||
* b╲(1). D│ . ╱ | |
|
||
* ╲ B.│. ╱near plane | |
|
||
* A= ╲━━━━━━━━━╱------------- |
|
||
* 120° ╲ c │ ╱ | z_2d
|
||
* ╲ │ ╱ z_near |
|
||
* left ╲ │ ╱ | |
|
||
* clip 60°fovy | |
|
||
* plane ╳----------------------
|
||
* |
|
||
* |
|
||
* origin line
|
||
*
|
||
* The area of interest is the triangle labeled (1) at the top left
|
||
* marked with the ... line (a) from where the origin line crosses
|
||
* the near plane to the top left where the stage line cross the
|
||
* left clip plane.
|
||
*
|
||
* The sides of the triangle are a, b and c and the corresponding
|
||
* angles opposite those sides are A, B and C.
|
||
*
|
||
* The angle of C is what trades off the gap size we have relative
|
||
* to the stage size vs the depth precision we have.
|
||
*
|
||
* As mentioned above we arove at the angle for C is by working
|
||
* backwards from how much space we want for test-texture-quality.
|
||
* With a stage_height of 480 we want a gap > 400, ideally we also
|
||
* wanted a somewhat round number as a percentage of the height for
|
||
* documentation purposes. ~87% or a gap of ~416 is the limit
|
||
* because that's where we approach a C angle of 0° and effectively
|
||
* loose all depth precision.
|
||
*
|
||
* So for our test app with a stage_height of 480 if we aim for a
|
||
* gap of 408 (85% of 480) we can get the angle D as
|
||
* atan (stage_height/2/408) = 30.5°.
|
||
*
|
||
* That gives us the angle for B as 90° - 30.5° = 59.5°
|
||
*
|
||
* We can already determine that A has an angle of (fovy/2 + 90°) =
|
||
* 120°
|
||
*
|
||
* Therefore C = 180 - A - B = 0.5°
|
||
*
|
||
* The length of c = z_near * tan (30°)
|
||
*
|
||
* Now we can use the rule a/SinA = c/SinC to calculate the
|
||
* length of a. After some rearranging that gives us:
|
||
*
|
||
* a c
|
||
* ---------- = ----------
|
||
* sin (120°) sin (0.5°)
|
||
*
|
||
* c * sin (120°)
|
||
* a = --------------
|
||
* sin (0.5°)
|
||
*
|
||
* And with that we can determine z_2d = cos (D) * a =
|
||
* cos (30.5°) * a + z_near:
|
||
*
|
||
* c * sin (120°) * cos (30.5°)
|
||
* z_2d = --------------------------- + z_near
|
||
* sin (0.5°)
|
||
*/
|
||
|
||
/* We expect the compiler should boil this down to z_near * CONSTANT
|
||
* already, but just in case we use precomputed constants
|
||
*/
|
||
#if 0
|
||
# define A tanf (_DEG_TO_RAD (30.f))
|
||
# define B sinf (_DEG_TO_RAD (120.f))
|
||
# define C cosf (_DEG_TO_RAD (30.5f))
|
||
# define D sinf (_DEG_TO_RAD (.5f))
|
||
#else
|
||
# define A 0.57735025882720947265625f
|
||
# define B 0.866025388240814208984375f
|
||
# define C 0.86162912845611572265625f
|
||
# define D 0.00872653536498546600341796875f
|
||
#endif
|
||
|
||
return z_near
|
||
* A * B * C
|
||
/ D
|
||
+ z_near;
|
||
}
|
||
|
||
static void
|
||
view_2d_in_perspective (graphene_matrix_t *matrix,
|
||
float fov_y,
|
||
float aspect,
|
||
float z_near,
|
||
float z_2d,
|
||
float width_2d,
|
||
float height_2d)
|
||
{
|
||
float top = z_near * tan (fov_y * G_PI / 360.0);
|
||
float left = -top * aspect;
|
||
float right = top * aspect;
|
||
float bottom = -top;
|
||
|
||
float left_2d_plane = left / z_near * z_2d;
|
||
float right_2d_plane = right / z_near * z_2d;
|
||
float bottom_2d_plane = bottom / z_near * z_2d;
|
||
float top_2d_plane = top / z_near * z_2d;
|
||
|
||
float width_2d_start = right_2d_plane - left_2d_plane;
|
||
float height_2d_start = top_2d_plane - bottom_2d_plane;
|
||
|
||
/* Factors to scale from framebuffer geometry to frustum
|
||
* cross-section geometry. */
|
||
float width_scale = width_2d_start / width_2d;
|
||
float height_scale = height_2d_start / height_2d;
|
||
|
||
graphene_matrix_init_scale (matrix, width_scale, -height_scale, width_scale);
|
||
graphene_matrix_translate (matrix,
|
||
&GRAPHENE_POINT3D_INIT (left_2d_plane,
|
||
top_2d_plane,
|
||
-z_2d));
|
||
}
|
||
|
||
static void
|
||
clutter_stage_update_view_perspective (ClutterStage *stage)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
ClutterPerspective perspective;
|
||
float z_2d;
|
||
|
||
perspective = priv->perspective;
|
||
|
||
perspective.fovy = 60.0; /* 60 Degrees */
|
||
perspective.z_near = 1.0;
|
||
perspective.aspect = priv->viewport[2] / priv->viewport[3];
|
||
z_2d = calculate_z_translation (perspective.z_near);
|
||
|
||
/* NB: z_2d is only enough room for 85% of the stage_height between
|
||
* the stage and the z_near plane. For behind the stage plane we
|
||
* want a more consistent gap of 10 times the stage_height before
|
||
* hitting the far plane so we calculate that relative to the final
|
||
* height of the stage plane at the z_2d_distance we got... */
|
||
perspective.z_far = z_2d +
|
||
tanf (_DEG_TO_RAD (perspective.fovy / 2.0f)) * z_2d * 20.0f;
|
||
|
||
clutter_stage_set_perspective (stage, &perspective);
|
||
|
||
view_2d_in_perspective (&priv->view,
|
||
perspective.fovy,
|
||
perspective.aspect,
|
||
perspective.z_near,
|
||
z_2d,
|
||
priv->viewport[2],
|
||
priv->viewport[3]);
|
||
|
||
clutter_actor_invalidate_transform (CLUTTER_ACTOR (stage));
|
||
}
|
||
|
||
void
|
||
_clutter_stage_maybe_setup_viewport (ClutterStage *stage,
|
||
ClutterStageView *view)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
|
||
if (clutter_stage_view_is_dirty_viewport (view))
|
||
{
|
||
cairo_rectangle_int_t view_layout;
|
||
float fb_scale;
|
||
float viewport_offset_x;
|
||
float viewport_offset_y;
|
||
float viewport_x;
|
||
float viewport_y;
|
||
float viewport_width;
|
||
float viewport_height;
|
||
|
||
CLUTTER_NOTE (PAINT,
|
||
"Setting up the viewport { w:%f, h:%f }",
|
||
priv->viewport[2],
|
||
priv->viewport[3]);
|
||
|
||
fb_scale = clutter_stage_view_get_scale (view);
|
||
clutter_stage_view_get_layout (view, &view_layout);
|
||
|
||
viewport_offset_x = view_layout.x * fb_scale;
|
||
viewport_offset_y = view_layout.y * fb_scale;
|
||
viewport_x = roundf (priv->viewport[0] * fb_scale - viewport_offset_x);
|
||
viewport_y = roundf (priv->viewport[1] * fb_scale - viewport_offset_y);
|
||
viewport_width = roundf (priv->viewport[2] * fb_scale);
|
||
viewport_height = roundf (priv->viewport[3] * fb_scale);
|
||
|
||
clutter_stage_view_set_viewport (view,
|
||
viewport_x, viewport_y,
|
||
viewport_width, viewport_height);
|
||
}
|
||
|
||
if (clutter_stage_view_is_dirty_projection (view))
|
||
clutter_stage_view_set_projection (view, &priv->projection);
|
||
}
|
||
|
||
#undef _DEG_TO_RAD
|
||
|
||
/**
|
||
* clutter_stage_is_redraw_queued_on_view: (skip)
|
||
*/
|
||
gboolean
|
||
clutter_stage_is_redraw_queued_on_view (ClutterStage *stage,
|
||
ClutterStageView *view)
|
||
{
|
||
clutter_stage_maybe_finish_queue_redraws (stage);
|
||
|
||
return clutter_stage_view_has_redraw_clip (view);
|
||
}
|
||
|
||
void
|
||
_clutter_stage_set_window (ClutterStage *stage,
|
||
ClutterStageWindow *stage_window)
|
||
{
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
g_return_if_fail (CLUTTER_IS_STAGE_WINDOW (stage_window));
|
||
|
||
if (stage->priv->impl != NULL)
|
||
g_object_unref (stage->priv->impl);
|
||
|
||
stage->priv->impl = stage_window;
|
||
}
|
||
|
||
ClutterStageWindow *
|
||
_clutter_stage_get_window (ClutterStage *stage)
|
||
{
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
|
||
|
||
return CLUTTER_STAGE_WINDOW (stage->priv->impl);
|
||
}
|
||
|
||
ClutterStageWindow *
|
||
_clutter_stage_get_default_window (void)
|
||
{
|
||
ClutterStageManager *manager = clutter_stage_manager_get_default ();
|
||
ClutterStage *stage;
|
||
|
||
stage = clutter_stage_manager_get_default_stage (manager);
|
||
if (stage == NULL)
|
||
return NULL;
|
||
|
||
return _clutter_stage_get_window (stage);
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_set_throttle_motion_events:
|
||
* @stage: a #ClutterStage
|
||
* @throttle: %TRUE to throttle motion events
|
||
*
|
||
* Sets whether motion events received between redraws should
|
||
* be throttled or not. If motion events are throttled, those
|
||
* events received by the windowing system between redraws will
|
||
* be compressed so that only the last event will be propagated
|
||
* to the @stage and its actors.
|
||
*
|
||
* This function should only be used if you want to have all
|
||
* the motion events delivered to your application code.
|
||
*
|
||
* Since: 1.0
|
||
*/
|
||
void
|
||
clutter_stage_set_throttle_motion_events (ClutterStage *stage,
|
||
gboolean throttle)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
priv = stage->priv;
|
||
|
||
if (priv->throttle_motion_events != throttle)
|
||
priv->throttle_motion_events = throttle;
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_get_throttle_motion_events:
|
||
* @stage: a #ClutterStage
|
||
*
|
||
* Retrieves the value set with clutter_stage_set_throttle_motion_events()
|
||
*
|
||
* Return value: %TRUE if the motion events are being throttled,
|
||
* and %FALSE otherwise
|
||
*
|
||
* Since: 1.0
|
||
*/
|
||
gboolean
|
||
clutter_stage_get_throttle_motion_events (ClutterStage *stage)
|
||
{
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), FALSE);
|
||
|
||
return stage->priv->throttle_motion_events;
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_set_minimum_size:
|
||
* @stage: a #ClutterStage
|
||
* @width: width, in pixels
|
||
* @height: height, in pixels
|
||
*
|
||
* Sets the minimum size for a stage window, if the default backend
|
||
* uses #ClutterStage inside a window
|
||
*
|
||
* This is a convenience function, and it is equivalent to setting the
|
||
* #ClutterActor:min-width and #ClutterActor:min-height on @stage
|
||
*
|
||
* If the current size of @stage is smaller than the minimum size, the
|
||
* @stage will be resized to the new @width and @height
|
||
*
|
||
* Since: 1.2
|
||
*/
|
||
void
|
||
clutter_stage_set_minimum_size (ClutterStage *stage,
|
||
guint width,
|
||
guint height)
|
||
{
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
g_return_if_fail ((width > 0) && (height > 0));
|
||
|
||
g_object_set (G_OBJECT (stage),
|
||
"min-width", (gfloat) width,
|
||
"min-height", (gfloat )height,
|
||
NULL);
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_get_minimum_size:
|
||
* @stage: a #ClutterStage
|
||
* @width: (out): return location for the minimum width, in pixels,
|
||
* or %NULL
|
||
* @height: (out): return location for the minimum height, in pixels,
|
||
* or %NULL
|
||
*
|
||
* Retrieves the minimum size for a stage window as set using
|
||
* clutter_stage_set_minimum_size().
|
||
*
|
||
* The returned size may not correspond to the actual minimum size and
|
||
* it is specific to the #ClutterStage implementation inside the
|
||
* Clutter backend
|
||
*
|
||
* Since: 1.2
|
||
*/
|
||
void
|
||
clutter_stage_get_minimum_size (ClutterStage *stage,
|
||
guint *width_p,
|
||
guint *height_p)
|
||
{
|
||
gfloat width, height;
|
||
gboolean width_set, height_set;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
g_object_get (G_OBJECT (stage),
|
||
"min-width", &width,
|
||
"min-width-set", &width_set,
|
||
"min-height", &height,
|
||
"min-height-set", &height_set,
|
||
NULL);
|
||
|
||
/* if not width or height have been set, then the Stage
|
||
* minimum size is defined to be 1x1
|
||
*/
|
||
if (!width_set)
|
||
width = 1;
|
||
|
||
if (!height_set)
|
||
height = 1;
|
||
|
||
if (width_p)
|
||
*width_p = (guint) width;
|
||
|
||
if (height_p)
|
||
*height_p = (guint) height;
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_schedule_update:
|
||
* @stage: a #ClutterStage actor
|
||
*
|
||
* Schedules a redraw of the #ClutterStage at the next optimal timestamp.
|
||
*/
|
||
void
|
||
clutter_stage_schedule_update (ClutterStage *stage)
|
||
{
|
||
ClutterStageWindow *stage_window;
|
||
GList *l;
|
||
|
||
if (CLUTTER_ACTOR_IN_DESTRUCTION (stage))
|
||
return;
|
||
|
||
stage_window = _clutter_stage_get_window (stage);
|
||
if (stage_window == NULL)
|
||
return;
|
||
|
||
for (l = clutter_stage_peek_stage_views (stage); l; l = l->next)
|
||
{
|
||
ClutterStageView *view = l->data;
|
||
|
||
clutter_stage_view_schedule_update (view);
|
||
}
|
||
}
|
||
|
||
ClutterPaintVolume *
|
||
_clutter_stage_paint_volume_stack_allocate (ClutterStage *stage)
|
||
{
|
||
GArray *paint_volume_stack = stage->priv->paint_volume_stack;
|
||
|
||
g_array_set_size (paint_volume_stack,
|
||
paint_volume_stack->len+1);
|
||
|
||
return &g_array_index (paint_volume_stack,
|
||
ClutterPaintVolume,
|
||
paint_volume_stack->len - 1);
|
||
}
|
||
|
||
void
|
||
_clutter_stage_paint_volume_stack_free_all (ClutterStage *stage)
|
||
{
|
||
GArray *paint_volume_stack = stage->priv->paint_volume_stack;
|
||
int i;
|
||
|
||
for (i = 0; i < paint_volume_stack->len; i++)
|
||
{
|
||
ClutterPaintVolume *pv =
|
||
&g_array_index (paint_volume_stack, ClutterPaintVolume, i);
|
||
clutter_paint_volume_free (pv);
|
||
}
|
||
|
||
g_array_set_size (paint_volume_stack, 0);
|
||
}
|
||
|
||
/* When an actor queues a redraw we add it to a list on the stage that
|
||
* gets processed once all updates to the stage have been finished.
|
||
*
|
||
* This deferred approach to processing queue_redraw requests means
|
||
* that we can avoid redundant transformations of clip volumes if
|
||
* something later triggers a full stage redraw anyway. It also means
|
||
* we can be more sure that all the referenced actors will have valid
|
||
* allocations improving the chance that we can determine the actors
|
||
* paint volume so we can clip the redraw request even if the user
|
||
* didn't explicitly do so.
|
||
*/
|
||
void
|
||
clutter_stage_queue_actor_redraw (ClutterStage *stage,
|
||
ClutterActor *actor,
|
||
const ClutterPaintVolume *clip)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
QueueRedrawEntry *entry = NULL;
|
||
|
||
CLUTTER_NOTE (CLIPPING, "stage_queue_actor_redraw (actor=%s, clip=%p): ",
|
||
_clutter_actor_get_debug_name (actor), clip);
|
||
|
||
/* Queuing a redraw or clip change invalidates the pick cache, unless we're
|
||
* in the middle of building it. So we reset the cached flag but don't
|
||
* completely clear the pick stack...
|
||
*/
|
||
priv->cached_pick_mode = CLUTTER_PICK_NONE;
|
||
|
||
if (!priv->pending_finish_queue_redraws)
|
||
{
|
||
GList *l;
|
||
|
||
for (l = clutter_stage_peek_stage_views (stage); l; l = l->next)
|
||
{
|
||
ClutterStageView *view = l->data;
|
||
|
||
clutter_stage_view_schedule_update (view);
|
||
}
|
||
|
||
priv->pending_finish_queue_redraws = TRUE;
|
||
}
|
||
|
||
entry = g_hash_table_lookup (priv->pending_queue_redraws, actor);
|
||
|
||
if (entry)
|
||
{
|
||
/* Ignore all requests to queue a redraw for an actor if a full
|
||
* (non-clipped) redraw of the actor has already been queued. */
|
||
if (!entry->has_clip)
|
||
{
|
||
CLUTTER_NOTE (CLIPPING, "Bail from stage_queue_actor_redraw (%s): "
|
||
"Unclipped redraw of actor already queued",
|
||
_clutter_actor_get_debug_name (actor));
|
||
return;
|
||
}
|
||
|
||
/* If queuing a clipped redraw and a clipped redraw has
|
||
* previously been queued for this actor then combine the latest
|
||
* clip together with the existing clip */
|
||
if (clip)
|
||
clutter_paint_volume_union (&entry->clip, clip);
|
||
else
|
||
{
|
||
clutter_paint_volume_free (&entry->clip);
|
||
entry->has_clip = FALSE;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
entry = g_slice_new (QueueRedrawEntry);
|
||
|
||
if (clip)
|
||
{
|
||
entry->has_clip = TRUE;
|
||
_clutter_paint_volume_init_static (&entry->clip, actor);
|
||
_clutter_paint_volume_set_from_volume (&entry->clip, clip);
|
||
}
|
||
else
|
||
entry->has_clip = FALSE;
|
||
|
||
g_hash_table_insert (priv->pending_queue_redraws,
|
||
g_object_ref (actor), entry);
|
||
}
|
||
}
|
||
|
||
static void
|
||
free_queue_redraw_entry (QueueRedrawEntry *entry)
|
||
{
|
||
if (entry->has_clip)
|
||
clutter_paint_volume_free (&entry->clip);
|
||
g_slice_free (QueueRedrawEntry, entry);
|
||
}
|
||
|
||
void
|
||
clutter_stage_dequeue_actor_redraw (ClutterStage *self,
|
||
ClutterActor *actor)
|
||
{
|
||
g_hash_table_remove (self->priv->pending_queue_redraws, actor);
|
||
}
|
||
|
||
static void
|
||
add_to_stage_clip (ClutterStage *stage,
|
||
ClutterPaintVolume *redraw_clip)
|
||
{
|
||
ClutterStageWindow *stage_window;
|
||
ClutterActorBox bounding_box;
|
||
ClutterActorBox intersection_box;
|
||
cairo_rectangle_int_t geom, stage_clip;
|
||
|
||
if (CLUTTER_ACTOR_IN_DESTRUCTION (CLUTTER_ACTOR (stage)))
|
||
return;
|
||
|
||
stage_window = _clutter_stage_get_window (stage);
|
||
if (stage_window == NULL)
|
||
return;
|
||
|
||
if (is_full_stage_redraw_queued (stage))
|
||
return;
|
||
|
||
if (redraw_clip == NULL)
|
||
{
|
||
clutter_stage_add_redraw_clip (stage, NULL);
|
||
return;
|
||
}
|
||
|
||
if (redraw_clip->is_empty)
|
||
return;
|
||
|
||
/* Now transform and project the clip volume to view coordinates and get
|
||
* the axis aligned bounding box that's aligned to the pixel grid.
|
||
*/
|
||
_clutter_paint_volume_get_stage_paint_box (redraw_clip,
|
||
stage,
|
||
&bounding_box);
|
||
|
||
_clutter_stage_window_get_geometry (stage_window, &geom);
|
||
|
||
intersection_box.x1 = MAX (bounding_box.x1, 0);
|
||
intersection_box.y1 = MAX (bounding_box.y1, 0);
|
||
intersection_box.x2 = MIN (bounding_box.x2, geom.width);
|
||
intersection_box.y2 = MIN (bounding_box.y2, geom.height);
|
||
|
||
/* There is no need to track degenerate/empty redraw clips */
|
||
if (intersection_box.x2 <= intersection_box.x1 ||
|
||
intersection_box.y2 <= intersection_box.y1)
|
||
return;
|
||
|
||
stage_clip.x = intersection_box.x1;
|
||
stage_clip.y = intersection_box.y1;
|
||
stage_clip.width = intersection_box.x2 - stage_clip.x;
|
||
stage_clip.height = intersection_box.y2 - stage_clip.y;
|
||
|
||
clutter_stage_add_redraw_clip (stage, &stage_clip);
|
||
}
|
||
|
||
void
|
||
clutter_stage_maybe_finish_queue_redraws (ClutterStage *stage)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
GHashTableIter iter;
|
||
gpointer key, value;
|
||
|
||
COGL_TRACE_BEGIN_SCOPED (ClutterStageFinishQueueRedraws, "FinishQueueRedraws");
|
||
|
||
if (!priv->pending_finish_queue_redraws)
|
||
return;
|
||
|
||
priv->pending_finish_queue_redraws = FALSE;
|
||
|
||
g_hash_table_iter_init (&iter, priv->pending_queue_redraws);
|
||
while (g_hash_table_iter_next (&iter, &key, &value))
|
||
{
|
||
ClutterActor *redraw_actor = key;
|
||
QueueRedrawEntry *entry = value;
|
||
ClutterPaintVolume old_actor_pv, new_actor_pv;
|
||
|
||
_clutter_paint_volume_init_static (&old_actor_pv, NULL);
|
||
_clutter_paint_volume_init_static (&new_actor_pv, NULL);
|
||
|
||
if (entry->has_clip)
|
||
{
|
||
add_to_stage_clip (stage, &entry->clip);
|
||
}
|
||
else if (clutter_actor_get_redraw_clip (redraw_actor,
|
||
&old_actor_pv,
|
||
&new_actor_pv))
|
||
{
|
||
/* Add both the old paint volume of the actor (which is
|
||
* currently visible on the screen) and the new paint volume
|
||
* (which will be visible on the screen after this redraw)
|
||
* to the redraw clip.
|
||
* The former we do to ensure the old texture on the screen
|
||
* will be fully painted over in case the actor was moved.
|
||
*/
|
||
add_to_stage_clip (stage, &old_actor_pv);
|
||
add_to_stage_clip (stage, &new_actor_pv);
|
||
}
|
||
else
|
||
{
|
||
/* If there's no clip we can use, we have to trigger an
|
||
* unclipped full stage redraw.
|
||
*/
|
||
add_to_stage_clip (stage, NULL);
|
||
}
|
||
|
||
g_hash_table_iter_remove (&iter);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_set_motion_events_enabled:
|
||
* @stage: a #ClutterStage
|
||
* @enabled: %TRUE to enable the motion events delivery, and %FALSE
|
||
* otherwise
|
||
*
|
||
* Sets whether per-actor motion events (and relative crossing
|
||
* events) should be disabled or not.
|
||
*
|
||
* The default is %TRUE.
|
||
*
|
||
* If @enable is %FALSE the following signals will not be emitted
|
||
* by the actors children of @stage:
|
||
*
|
||
* - #ClutterActor::motion-event
|
||
* - #ClutterActor::enter-event
|
||
* - #ClutterActor::leave-event
|
||
*
|
||
* The events will still be delivered to the #ClutterStage.
|
||
*
|
||
* The main side effect of this function is that disabling the motion
|
||
* events will disable picking to detect the #ClutterActor underneath
|
||
* the pointer for each motion event. This is useful, for instance,
|
||
* when dragging a #ClutterActor across the @stage: the actor underneath
|
||
* the pointer is not going to change, so it's meaningless to perform
|
||
* a pick.
|
||
*
|
||
* Since: 1.8
|
||
*/
|
||
void
|
||
clutter_stage_set_motion_events_enabled (ClutterStage *stage,
|
||
gboolean enabled)
|
||
{
|
||
ClutterStagePrivate *priv;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
priv = stage->priv;
|
||
|
||
enabled = !!enabled;
|
||
|
||
if (priv->motion_events_enabled != enabled)
|
||
priv->motion_events_enabled = enabled;
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_get_motion_events_enabled:
|
||
* @stage: a #ClutterStage
|
||
*
|
||
* Retrieves the value set using clutter_stage_set_motion_events_enabled().
|
||
*
|
||
* Return value: %TRUE if the per-actor motion event delivery is enabled
|
||
* and %FALSE otherwise
|
||
*
|
||
* Since: 1.8
|
||
*/
|
||
gboolean
|
||
clutter_stage_get_motion_events_enabled (ClutterStage *stage)
|
||
{
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), FALSE);
|
||
|
||
return stage->priv->motion_events_enabled;
|
||
}
|
||
|
||
void
|
||
_clutter_stage_add_pointer_drag_actor (ClutterStage *stage,
|
||
ClutterInputDevice *device,
|
||
ClutterActor *actor)
|
||
{
|
||
GHashTable *drag_actors;
|
||
|
||
drag_actors = g_object_get_data (G_OBJECT (stage),
|
||
"__clutter_stage_pointer_drag_actors");
|
||
if (drag_actors == NULL)
|
||
{
|
||
drag_actors = g_hash_table_new (NULL, NULL);
|
||
g_object_set_data_full (G_OBJECT (stage),
|
||
"__clutter_stage_pointer_drag_actors",
|
||
drag_actors,
|
||
(GDestroyNotify) g_hash_table_destroy);
|
||
}
|
||
|
||
g_hash_table_replace (drag_actors, device, actor);
|
||
}
|
||
|
||
ClutterActor *
|
||
_clutter_stage_get_pointer_drag_actor (ClutterStage *stage,
|
||
ClutterInputDevice *device)
|
||
{
|
||
GHashTable *drag_actors;
|
||
|
||
drag_actors = g_object_get_data (G_OBJECT (stage),
|
||
"__clutter_stage_pointer_drag_actors");
|
||
if (drag_actors == NULL)
|
||
return NULL;
|
||
|
||
return g_hash_table_lookup (drag_actors, device);
|
||
}
|
||
|
||
void
|
||
_clutter_stage_remove_pointer_drag_actor (ClutterStage *stage,
|
||
ClutterInputDevice *device)
|
||
{
|
||
GHashTable *drag_actors;
|
||
|
||
drag_actors = g_object_get_data (G_OBJECT (stage),
|
||
"__clutter_stage_pointer_drag_actors");
|
||
if (drag_actors == NULL)
|
||
return;
|
||
|
||
g_hash_table_remove (drag_actors, device);
|
||
|
||
if (g_hash_table_size (drag_actors) == 0)
|
||
g_object_set_data (G_OBJECT (stage),
|
||
"__clutter_stage_pointer_drag_actors",
|
||
NULL);
|
||
}
|
||
|
||
void
|
||
_clutter_stage_add_touch_drag_actor (ClutterStage *stage,
|
||
ClutterEventSequence *sequence,
|
||
ClutterActor *actor)
|
||
{
|
||
GHashTable *drag_actors;
|
||
|
||
drag_actors = g_object_get_data (G_OBJECT (stage),
|
||
"__clutter_stage_touch_drag_actors");
|
||
if (drag_actors == NULL)
|
||
{
|
||
drag_actors = g_hash_table_new (NULL, NULL);
|
||
g_object_set_data_full (G_OBJECT (stage),
|
||
"__clutter_stage_touch_drag_actors",
|
||
drag_actors,
|
||
(GDestroyNotify) g_hash_table_destroy);
|
||
}
|
||
|
||
g_hash_table_replace (drag_actors, sequence, actor);
|
||
}
|
||
|
||
ClutterActor *
|
||
_clutter_stage_get_touch_drag_actor (ClutterStage *stage,
|
||
ClutterEventSequence *sequence)
|
||
{
|
||
GHashTable *drag_actors;
|
||
|
||
drag_actors = g_object_get_data (G_OBJECT (stage),
|
||
"__clutter_stage_touch_drag_actors");
|
||
if (drag_actors == NULL)
|
||
return NULL;
|
||
|
||
return g_hash_table_lookup (drag_actors, sequence);
|
||
}
|
||
|
||
void
|
||
_clutter_stage_remove_touch_drag_actor (ClutterStage *stage,
|
||
ClutterEventSequence *sequence)
|
||
{
|
||
GHashTable *drag_actors;
|
||
|
||
drag_actors = g_object_get_data (G_OBJECT (stage),
|
||
"__clutter_stage_touch_drag_actors");
|
||
if (drag_actors == NULL)
|
||
return;
|
||
|
||
g_hash_table_remove (drag_actors, sequence);
|
||
|
||
if (g_hash_table_size (drag_actors) == 0)
|
||
g_object_set_data (G_OBJECT (stage),
|
||
"__clutter_stage_touch_drag_actors",
|
||
NULL);
|
||
}
|
||
|
||
/*< private >
|
||
* _clutter_stage_get_state:
|
||
* @stage: a #ClutterStage
|
||
*
|
||
* Retrieves the current #ClutterStageState flags associated to the @stage.
|
||
*
|
||
* Return value: a bitwise OR of #ClutterStageState flags
|
||
*/
|
||
ClutterStageState
|
||
_clutter_stage_get_state (ClutterStage *stage)
|
||
{
|
||
return stage->priv->current_state;
|
||
}
|
||
|
||
/*< private >
|
||
* _clutter_stage_is_activated:
|
||
* @stage: a #ClutterStage
|
||
*
|
||
* Checks whether the @stage state includes %CLUTTER_STAGE_STATE_ACTIVATED.
|
||
*
|
||
* Return value: %TRUE if the @stage is active
|
||
*/
|
||
gboolean
|
||
_clutter_stage_is_activated (ClutterStage *stage)
|
||
{
|
||
return (stage->priv->current_state & CLUTTER_STAGE_STATE_ACTIVATED) != 0;
|
||
}
|
||
|
||
/*< private >
|
||
* _clutter_stage_update_state:
|
||
* @stage: a #ClutterStage
|
||
* @unset_flags: flags to unset
|
||
* @set_flags: flags to set
|
||
*
|
||
* Updates the state of @stage, by unsetting the @unset_flags and setting
|
||
* the @set_flags.
|
||
*
|
||
* If the stage state has been changed, this function will queue a
|
||
* #ClutterEvent of type %CLUTTER_STAGE_STATE.
|
||
*
|
||
* Return value: %TRUE if the state was updated, and %FALSE otherwise
|
||
*/
|
||
gboolean
|
||
_clutter_stage_update_state (ClutterStage *stage,
|
||
ClutterStageState unset_flags,
|
||
ClutterStageState set_flags)
|
||
{
|
||
ClutterStageState new_state;
|
||
ClutterEvent *event;
|
||
|
||
new_state = stage->priv->current_state;
|
||
new_state |= set_flags;
|
||
new_state &= ~unset_flags;
|
||
|
||
if (new_state == stage->priv->current_state)
|
||
return FALSE;
|
||
|
||
event = clutter_event_new (CLUTTER_STAGE_STATE);
|
||
clutter_event_set_stage (event, stage);
|
||
|
||
event->stage_state.new_state = new_state;
|
||
event->stage_state.changed_mask = new_state ^ stage->priv->current_state;
|
||
|
||
stage->priv->current_state = new_state;
|
||
|
||
clutter_stage_event (stage, event);
|
||
clutter_event_free (event);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_set_sync_delay:
|
||
* @stage: a #ClutterStage
|
||
* @sync_delay: number of milliseconds after frame presentation to wait
|
||
* before painting the next frame. If less than zero, restores the
|
||
* default behavior where redraw is throttled to the refresh rate but
|
||
* not synchronized to it.
|
||
*
|
||
* This function enables an alternate behavior where Clutter draws at
|
||
* a fixed point in time after the frame presentation time (also known
|
||
* as the VBlank time). This is most useful when the application
|
||
* wants to show incoming data with predictable latency. (The primary
|
||
* example of this would be a window system compositor.) By synchronizing
|
||
* to provide new data before Clutter redraws, an external source of
|
||
* updates (in the compositor, an application) can get a reliable latency.
|
||
*
|
||
* The appropriate value of @sync_delay depends on the complexity of
|
||
* drawing the stage's scene graph - in general a value of between 0
|
||
* and 8 ms (up to one-half of a typical 60hz frame rate) is appropriate.
|
||
* using a larger value will reduce latency but risks skipping a frame if
|
||
* drawing the stage takes too long.
|
||
*
|
||
* Since: 1.14
|
||
* Stability: unstable
|
||
*/
|
||
void
|
||
clutter_stage_set_sync_delay (ClutterStage *stage,
|
||
gint sync_delay)
|
||
{
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
stage->priv->sync_delay = sync_delay;
|
||
}
|
||
|
||
int64_t
|
||
clutter_stage_get_frame_counter (ClutterStage *stage)
|
||
{
|
||
ClutterStageWindow *stage_window;
|
||
|
||
stage_window = _clutter_stage_get_window (stage);
|
||
return _clutter_stage_window_get_frame_counter (stage_window);
|
||
}
|
||
|
||
void
|
||
clutter_stage_presented (ClutterStage *stage,
|
||
ClutterStageView *view,
|
||
ClutterFrameInfo *frame_info)
|
||
{
|
||
g_signal_emit (stage, stage_signals[PRESENTED], 0, view, frame_info);
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_get_capture_final_size:
|
||
* @stage: a #ClutterStage actor
|
||
* @rect: a #cairo_rectangle_int_t
|
||
* @out_width: (out) (optional): the final width
|
||
* @out_height: (out) (optional): the final height
|
||
* @out_scale: (out) (optional): the final scale factor
|
||
*
|
||
* Get the size of the framebuffer one must pass to
|
||
* clutter_stage_paint_to_buffer() or clutter_stage_paint_to_framebuffer()
|
||
* would be used with the same @rect.
|
||
*
|
||
* Returns: %TRUE if the size has been retrieved, %FALSE otherwise.
|
||
*/
|
||
gboolean
|
||
clutter_stage_get_capture_final_size (ClutterStage *stage,
|
||
cairo_rectangle_int_t *rect,
|
||
int *out_width,
|
||
int *out_height,
|
||
float *out_scale)
|
||
{
|
||
float max_scale = 1.0;
|
||
|
||
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), FALSE);
|
||
|
||
if (rect)
|
||
{
|
||
graphene_rect_t capture_rect;
|
||
g_autoptr (GList) views = NULL;
|
||
GList *l;
|
||
|
||
_clutter_util_rect_from_rectangle (rect, &capture_rect);
|
||
views = clutter_stage_get_views_for_rect (stage, &capture_rect);
|
||
|
||
if (!views)
|
||
return FALSE;
|
||
|
||
for (l = views; l; l = l->next)
|
||
{
|
||
ClutterStageView *view = l->data;
|
||
|
||
max_scale = MAX (clutter_stage_view_get_scale (view), max_scale);
|
||
}
|
||
|
||
if (out_width)
|
||
*out_width = (gint) roundf (rect->width * max_scale);
|
||
|
||
if (out_height)
|
||
*out_height = (gint) roundf (rect->height * max_scale);
|
||
}
|
||
else
|
||
{
|
||
ClutterActorBox alloc;
|
||
float stage_width, stage_height;
|
||
|
||
clutter_actor_get_allocation_box (CLUTTER_ACTOR (stage), &alloc);
|
||
clutter_actor_box_get_size (&alloc, &stage_width, &stage_height);
|
||
max_scale = clutter_actor_get_real_resource_scale (CLUTTER_ACTOR (stage));
|
||
|
||
if (out_width)
|
||
*out_width = (gint) roundf (stage_width * max_scale);
|
||
|
||
if (out_height)
|
||
*out_height = (gint) roundf (stage_height * max_scale);
|
||
}
|
||
|
||
if (out_scale)
|
||
*out_scale = max_scale;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
void
|
||
clutter_stage_paint_to_framebuffer (ClutterStage *stage,
|
||
CoglFramebuffer *framebuffer,
|
||
const cairo_rectangle_int_t *rect,
|
||
float scale,
|
||
ClutterPaintFlag paint_flags)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
ClutterPaintContext *paint_context;
|
||
cairo_region_t *redraw_clip;
|
||
|
||
if (paint_flags & CLUTTER_PAINT_FLAG_CLEAR)
|
||
{
|
||
CoglColor clear_color;
|
||
|
||
cogl_color_init_from_4ub (&clear_color, 0, 0, 0, 0);
|
||
cogl_framebuffer_clear (framebuffer, COGL_BUFFER_BIT_COLOR, &clear_color);
|
||
}
|
||
|
||
redraw_clip = cairo_region_create_rectangle (rect);
|
||
paint_context =
|
||
clutter_paint_context_new_for_framebuffer (framebuffer,
|
||
redraw_clip,
|
||
paint_flags);
|
||
cairo_region_destroy (redraw_clip);
|
||
|
||
cogl_framebuffer_push_matrix (framebuffer);
|
||
cogl_framebuffer_set_projection_matrix (framebuffer, &priv->projection);
|
||
cogl_framebuffer_set_viewport (framebuffer,
|
||
-(rect->x * scale),
|
||
-(rect->y * scale),
|
||
priv->viewport[2] * scale,
|
||
priv->viewport[3] * scale);
|
||
clutter_actor_paint (CLUTTER_ACTOR (stage), paint_context);
|
||
cogl_framebuffer_pop_matrix (framebuffer);
|
||
|
||
clutter_paint_context_destroy (paint_context);
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_paint_to_buffer:
|
||
* @stage: a #ClutterStage actor
|
||
* @rect: a #cairo_rectangle_int_t
|
||
* @scale: the scale
|
||
* @data: (inout) (array) (element-type guint8): a pointer to the data
|
||
* @stride: stride of the image surface
|
||
* @format: the pixel format
|
||
* @paint_flags: the #ClutterPaintFlag
|
||
* @error: the error
|
||
*
|
||
* Take a snapshot of the stage to a provided buffer.
|
||
*
|
||
* Returns: %TRUE is the buffer has been paint successfully, %FALSE otherwise.
|
||
*/
|
||
gboolean
|
||
clutter_stage_paint_to_buffer (ClutterStage *stage,
|
||
const cairo_rectangle_int_t *rect,
|
||
float scale,
|
||
uint8_t *data,
|
||
int stride,
|
||
CoglPixelFormat format,
|
||
ClutterPaintFlag paint_flags,
|
||
GError **error)
|
||
{
|
||
ClutterBackend *clutter_backend = clutter_get_default_backend ();
|
||
CoglContext *cogl_context =
|
||
clutter_backend_get_cogl_context (clutter_backend);
|
||
int texture_width, texture_height;
|
||
CoglTexture2D *texture;
|
||
CoglOffscreen *offscreen;
|
||
CoglFramebuffer *framebuffer;
|
||
CoglBitmap *bitmap;
|
||
|
||
texture_width = (int) roundf (rect->width * scale);
|
||
texture_height = (int) roundf (rect->height * scale);
|
||
texture = cogl_texture_2d_new_with_size (cogl_context,
|
||
texture_width,
|
||
texture_height);
|
||
if (!texture)
|
||
{
|
||
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
||
"Failed to create %dx%d texture",
|
||
texture_width, texture_height);
|
||
return FALSE;
|
||
}
|
||
|
||
offscreen = cogl_offscreen_new_with_texture (COGL_TEXTURE (texture));
|
||
framebuffer = COGL_FRAMEBUFFER (offscreen);
|
||
|
||
cogl_object_unref (texture);
|
||
|
||
if (!cogl_framebuffer_allocate (framebuffer, error))
|
||
return FALSE;
|
||
|
||
clutter_stage_paint_to_framebuffer (stage, framebuffer,
|
||
rect, scale, paint_flags);
|
||
|
||
bitmap = cogl_bitmap_new_for_data (cogl_context,
|
||
texture_width, texture_height,
|
||
format,
|
||
stride,
|
||
data);
|
||
|
||
cogl_framebuffer_read_pixels_into_bitmap (framebuffer,
|
||
0, 0,
|
||
COGL_READ_PIXELS_COLOR_BUFFER,
|
||
bitmap);
|
||
|
||
cogl_object_unref (bitmap);
|
||
g_object_unref (framebuffer);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static void
|
||
capture_view_into (ClutterStage *stage,
|
||
gboolean paint,
|
||
ClutterStageView *view,
|
||
cairo_rectangle_int_t *rect,
|
||
uint8_t *data,
|
||
int stride)
|
||
{
|
||
CoglFramebuffer *framebuffer;
|
||
ClutterBackend *backend;
|
||
CoglContext *context;
|
||
CoglBitmap *bitmap;
|
||
cairo_rectangle_int_t view_layout;
|
||
float view_scale;
|
||
float texture_width;
|
||
float texture_height;
|
||
|
||
g_return_if_fail (CLUTTER_IS_STAGE (stage));
|
||
|
||
framebuffer = clutter_stage_view_get_framebuffer (view);
|
||
|
||
if (paint)
|
||
{
|
||
cairo_region_t *region;
|
||
|
||
_clutter_stage_maybe_setup_viewport (stage, view);
|
||
region = cairo_region_create_rectangle (rect);
|
||
clutter_stage_do_paint_view (stage, view, region);
|
||
cairo_region_destroy (region);
|
||
}
|
||
|
||
view_scale = clutter_stage_view_get_scale (view);
|
||
texture_width = roundf (rect->width * view_scale);
|
||
texture_height = roundf (rect->height * view_scale);
|
||
|
||
backend = clutter_get_default_backend ();
|
||
context = clutter_backend_get_cogl_context (backend);
|
||
bitmap = cogl_bitmap_new_for_data (context,
|
||
texture_width, texture_height,
|
||
CLUTTER_CAIRO_FORMAT_ARGB32,
|
||
stride,
|
||
data);
|
||
|
||
clutter_stage_view_get_layout (view, &view_layout);
|
||
|
||
cogl_framebuffer_read_pixels_into_bitmap (framebuffer,
|
||
roundf ((rect->x - view_layout.x) * view_scale),
|
||
roundf ((rect->y - view_layout.y) * view_scale),
|
||
COGL_READ_PIXELS_COLOR_BUFFER,
|
||
bitmap);
|
||
|
||
cogl_object_unref (bitmap);
|
||
}
|
||
|
||
void
|
||
clutter_stage_capture_into (ClutterStage *stage,
|
||
gboolean paint,
|
||
cairo_rectangle_int_t *rect,
|
||
uint8_t *data)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
GList *l;
|
||
int bpp = 4;
|
||
int stride;
|
||
|
||
stride = rect->width * 4;
|
||
|
||
for (l = _clutter_stage_window_get_views (priv->impl); l; l = l->next)
|
||
{
|
||
ClutterStageView *view = l->data;
|
||
cairo_rectangle_int_t view_layout;
|
||
cairo_region_t *region;
|
||
cairo_rectangle_int_t capture_rect;
|
||
int x_offset, y_offset;
|
||
|
||
clutter_stage_view_get_layout (view, &view_layout);
|
||
region = cairo_region_create_rectangle (&view_layout);
|
||
cairo_region_intersect_rectangle (region, rect);
|
||
|
||
cairo_region_get_extents (region, &capture_rect);
|
||
cairo_region_destroy (region);
|
||
|
||
x_offset = capture_rect.x - rect->x;
|
||
y_offset = capture_rect.y - rect->y;
|
||
|
||
capture_view_into (stage, paint, view,
|
||
&capture_rect,
|
||
data + (x_offset * bpp) + (y_offset * stride),
|
||
stride);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* clutter_stage_peek_stage_views: (skip)
|
||
*/
|
||
GList *
|
||
clutter_stage_peek_stage_views (ClutterStage *stage)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
|
||
return _clutter_stage_window_get_views (priv->impl);
|
||
}
|
||
|
||
void
|
||
clutter_stage_clear_stage_views (ClutterStage *stage)
|
||
{
|
||
clutter_actor_clear_stage_views_recursive (CLUTTER_ACTOR (stage));
|
||
}
|
||
|
||
GList *
|
||
clutter_stage_get_views_for_rect (ClutterStage *stage,
|
||
const graphene_rect_t *rect)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
GList *views_for_rect = NULL;
|
||
GList *l;
|
||
|
||
for (l = _clutter_stage_window_get_views (priv->impl); l; l = l->next)
|
||
{
|
||
ClutterStageView *view = l->data;
|
||
cairo_rectangle_int_t view_layout;
|
||
graphene_rect_t view_rect;
|
||
|
||
clutter_stage_view_get_layout (view, &view_layout);
|
||
_clutter_util_rect_from_rectangle (&view_layout, &view_rect);
|
||
|
||
if (graphene_rect_intersection (&view_rect, rect, NULL))
|
||
views_for_rect = g_list_prepend (views_for_rect, view);
|
||
}
|
||
|
||
return views_for_rect;
|
||
}
|
||
|
||
void
|
||
clutter_stage_set_actor_needs_immediate_relayout (ClutterStage *stage)
|
||
{
|
||
ClutterStagePrivate *priv = stage->priv;
|
||
|
||
priv->actor_needs_immediate_relayout = TRUE;
|
||
}
|