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mutter/clutter/clutter/clutter-main.c
Carlos Garnacho 4fb968af76 clutter: Remove reentrancy checks at emit_event_chain() 
When using alt-tab to switch between windows, on a key handler we
undo the compositor grab, which triggers a repick, which generates
crossing events, which are handled in place, and trigger these
reentrancy checks.

On one hand, we do intend these crossings to take effect in place,
rather than being queued (possibly after a number of already queued
events). On the other hand, we now outright discourage generating
events from random places (and hope to make it just not possible,
eventually) thus we can afford not to protect against reentrancy
caused by API misuse.

So just drop these checks, and let these crossing events be
properly handled.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1657>
2020-12-28 19:11:26 +01:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:clutter-main
* @short_description: Various 'global' Clutter functions.
*
* Functions to retrieve various global Clutter resources and other utility
* functions for mainloops, events and threads
*
* ## The Clutter Threading Model
*
* Clutter is *thread-aware*: all operations performed by Clutter are assumed
* to be under the Big Clutter Lock, which is created when the threading is
* initialized through clutter_init(), and entered when calling user-related
* code during event handling and actor drawing.
*
* The only safe and portable way to use the Clutter API in a multi-threaded
* environment is to only access the Clutter API from a thread that did called
* clutter_init() and clutter_main().
*
* The common pattern for using threads with Clutter is to use worker threads
* to perform blocking operations and then install idle or timeout sources with
* the result when the thread finishes, and update the UI from those callbacks.
*
* For a working example of how to use a worker thread to update the UI, see
* [threads.c](https://git.gnome.org/browse/clutter/tree/examples/threads.c?h=clutter-1.18)
*/
#include "clutter-build-config.h"
#include <stdlib.h>
#include "clutter-actor-private.h"
#include "clutter-backend-private.h"
#include "clutter-config.h"
#include "clutter-debug.h"
#include "clutter-event-private.h"
#include "clutter-feature.h"
#include "clutter-input-device-private.h"
#include "clutter-input-pointer-a11y-private.h"
#include "clutter-graphene.h"
#include "clutter-main.h"
#include "clutter-mutter.h"
#include "clutter-paint-node-private.h"
#include "clutter-private.h"
#include "clutter-settings-private.h"
#include "clutter-stage.h"
#include "clutter-stage-manager.h"
#include "clutter-stage-private.h"
#include "clutter-backend-private.h"
#include <cogl/cogl.h>
#include <cogl-pango/cogl-pango.h>
#include "cally/cally.h" /* For accessibility support */
/* main context */
static ClutterMainContext *ClutterCntx = NULL;
/* command line options */
static gboolean clutter_is_initialized = FALSE;
static gboolean clutter_show_fps = FALSE;
static gboolean clutter_fatal_warnings = FALSE;
static gboolean clutter_disable_mipmap_text = FALSE;
static gboolean clutter_enable_accessibility = TRUE;
static gboolean clutter_sync_to_vblank = TRUE;
static guint clutter_default_fps = 60;
static ClutterTextDirection clutter_text_direction = CLUTTER_TEXT_DIRECTION_LTR;
/* debug flags */
guint clutter_debug_flags = 0;
guint clutter_paint_debug_flags = 0;
guint clutter_pick_debug_flags = 0;
#ifdef CLUTTER_ENABLE_DEBUG
static const GDebugKey clutter_debug_keys[] = {
{ "misc", CLUTTER_DEBUG_MISC },
{ "actor", CLUTTER_DEBUG_ACTOR },
{ "texture", CLUTTER_DEBUG_TEXTURE },
{ "event", CLUTTER_DEBUG_EVENT },
{ "paint", CLUTTER_DEBUG_PAINT },
{ "pick", CLUTTER_DEBUG_PICK },
{ "pango", CLUTTER_DEBUG_PANGO },
{ "backend", CLUTTER_DEBUG_BACKEND },
{ "scheduler", CLUTTER_DEBUG_SCHEDULER },
{ "script", CLUTTER_DEBUG_SCRIPT },
{ "shader", CLUTTER_DEBUG_SHADER },
{ "animation", CLUTTER_DEBUG_ANIMATION },
{ "layout", CLUTTER_DEBUG_LAYOUT },
{ "clipping", CLUTTER_DEBUG_CLIPPING },
{ "oob-transforms", CLUTTER_DEBUG_OOB_TRANSFORMS },
};
#endif /* CLUTTER_ENABLE_DEBUG */
static const GDebugKey clutter_pick_debug_keys[] = {
{ "nop-picking", CLUTTER_DEBUG_NOP_PICKING },
};
static const GDebugKey clutter_paint_debug_keys[] = {
{ "disable-swap-events", CLUTTER_DEBUG_DISABLE_SWAP_EVENTS },
{ "disable-clipped-redraws", CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS },
{ "redraws", CLUTTER_DEBUG_REDRAWS },
{ "paint-volumes", CLUTTER_DEBUG_PAINT_VOLUMES },
{ "disable-culling", CLUTTER_DEBUG_DISABLE_CULLING },
{ "disable-offscreen-redirect", CLUTTER_DEBUG_DISABLE_OFFSCREEN_REDIRECT },
{ "continuous-redraw", CLUTTER_DEBUG_CONTINUOUS_REDRAW },
{ "paint-deform-tiles", CLUTTER_DEBUG_PAINT_DEFORM_TILES },
{ "damage-region", CLUTTER_DEBUG_PAINT_DAMAGE_REGION },
};
#define ENVIRONMENT_GROUP "Environment"
#define DEBUG_GROUP "Debug"
static void
clutter_config_read_from_key_file (GKeyFile *keyfile)
{
GError *key_error = NULL;
gboolean bool_value;
gint int_value;
gchar *str_value;
if (!g_key_file_has_group (keyfile, ENVIRONMENT_GROUP))
return;
str_value =
g_key_file_get_string (keyfile, ENVIRONMENT_GROUP,
"Drivers",
&key_error);
if (key_error != NULL)
g_clear_error (&key_error);
else
clutter_set_allowed_drivers (str_value);
g_free (str_value);
bool_value =
g_key_file_get_boolean (keyfile, ENVIRONMENT_GROUP,
"ShowFps",
&key_error);
if (key_error != NULL)
g_clear_error (&key_error);
else
clutter_show_fps = bool_value;
bool_value =
g_key_file_get_boolean (keyfile, ENVIRONMENT_GROUP,
"DisableMipmappedText",
&key_error);
if (key_error != NULL)
g_clear_error (&key_error);
else
clutter_disable_mipmap_text = bool_value;
bool_value =
g_key_file_get_boolean (keyfile, ENVIRONMENT_GROUP,
"EnableAccessibility",
&key_error);
if (key_error != NULL)
g_clear_error (&key_error);
else
clutter_enable_accessibility = bool_value;
int_value =
g_key_file_get_integer (keyfile, ENVIRONMENT_GROUP,
"DefaultFps",
&key_error);
if (key_error != NULL)
g_clear_error (&key_error);
else
clutter_default_fps = int_value;
str_value =
g_key_file_get_string (keyfile, ENVIRONMENT_GROUP,
"TextDirection",
&key_error);
if (key_error != NULL)
g_clear_error (&key_error);
else
{
if (g_strcmp0 (str_value, "rtl") == 0)
clutter_text_direction = CLUTTER_TEXT_DIRECTION_RTL;
else
clutter_text_direction = CLUTTER_TEXT_DIRECTION_LTR;
}
g_free (str_value);
}
#ifdef CLUTTER_ENABLE_DEBUG
static void
clutter_debug_read_from_key_file (GKeyFile *keyfile)
{
GError *key_error = NULL;
gchar *value;
if (!g_key_file_has_group (keyfile, DEBUG_GROUP))
return;
value = g_key_file_get_value (keyfile, DEBUG_GROUP,
"Debug",
&key_error);
if (key_error == NULL)
{
clutter_debug_flags |=
g_parse_debug_string (value,
clutter_debug_keys,
G_N_ELEMENTS (clutter_debug_keys));
}
else
g_clear_error (&key_error);
g_free (value);
value = g_key_file_get_value (keyfile, DEBUG_GROUP,
"PaintDebug",
&key_error);
if (key_error == NULL)
{
clutter_paint_debug_flags |=
g_parse_debug_string (value,
clutter_paint_debug_keys,
G_N_ELEMENTS (clutter_paint_debug_keys));
}
else
g_clear_error (&key_error);
g_free (value);
value = g_key_file_get_value (keyfile, DEBUG_GROUP,
"PickDebug",
&key_error);
if (key_error == NULL)
{
clutter_pick_debug_flags |=
g_parse_debug_string (value,
clutter_pick_debug_keys,
G_N_ELEMENTS (clutter_pick_debug_keys));
}
else
g_clear_error (&key_error);
g_free (value);
}
#endif
static void
clutter_config_read_from_file (const gchar *config_path)
{
ClutterSettings *settings = clutter_settings_get_default ();
GKeyFile *key_file = g_key_file_new ();
GError *error = NULL;
g_key_file_load_from_file (key_file, config_path, G_KEY_FILE_NONE, &error);
if (error == NULL)
{
CLUTTER_NOTE (MISC, "Reading configuration from '%s'", config_path);
clutter_config_read_from_key_file (key_file);
#ifdef CLUTTER_ENABLE_DEBUG
clutter_debug_read_from_key_file (key_file);
#endif
_clutter_settings_read_from_key_file (settings, key_file);
}
else
{
g_warning ("Unable to read configuration settings from '%s': %s",
config_path,
error->message);
g_error_free (error);
}
g_key_file_free (key_file);
}
static void
clutter_config_read (void)
{
gchar *config_path;
config_path = g_build_filename (CLUTTER_SYSCONFDIR,
"clutter-1.0",
"settings.ini",
NULL);
if (g_file_test (config_path, G_FILE_TEST_EXISTS))
clutter_config_read_from_file (config_path);
g_free (config_path);
config_path = g_build_filename (g_get_user_config_dir (),
"clutter-1.0",
"settings.ini",
NULL);
if (g_file_test (config_path, G_FILE_TEST_EXISTS))
clutter_config_read_from_file (config_path);
g_free (config_path);
}
gboolean
_clutter_context_get_show_fps (void)
{
ClutterMainContext *context = _clutter_context_get_default ();
return context->show_fps;
}
/**
* clutter_get_accessibility_enabled:
*
* Returns whether Clutter has accessibility support enabled. As
* least, a value of TRUE means that there are a proper AtkUtil
* implementation available
*
* Return value: %TRUE if Clutter has accessibility support enabled
*
* Since: 1.4
*/
gboolean
clutter_get_accessibility_enabled (void)
{
return cally_get_cally_initialized ();
}
/**
* clutter_disable_accessibility:
*
* Disable loading the accessibility support. It has the same effect
* as setting the environment variable
* CLUTTER_DISABLE_ACCESSIBILITY. For the same reason, this method
* should be called before clutter_init().
*
* Since: 1.14
*/
void
clutter_disable_accessibility (void)
{
if (clutter_is_initialized)
{
g_warning ("clutter_disable_accessibility() can only be called before "
"initializing Clutter.");
return;
}
clutter_enable_accessibility = FALSE;
}
static CoglPangoFontMap *
clutter_context_get_pango_fontmap (void)
{
ClutterMainContext *self;
CoglPangoFontMap *font_map;
gdouble resolution;
gboolean use_mipmapping;
self = _clutter_context_get_default ();
if (G_LIKELY (self->font_map != NULL))
return self->font_map;
font_map = COGL_PANGO_FONT_MAP (cogl_pango_font_map_new ());
resolution = clutter_backend_get_resolution (self->backend);
cogl_pango_font_map_set_resolution (font_map, resolution);
use_mipmapping = !clutter_disable_mipmap_text;
cogl_pango_font_map_set_use_mipmapping (font_map, use_mipmapping);
self->font_map = font_map;
return self->font_map;
}
static ClutterTextDirection
clutter_get_text_direction (void)
{
ClutterTextDirection dir = CLUTTER_TEXT_DIRECTION_LTR;
const gchar *direction;
direction = g_getenv ("CLUTTER_TEXT_DIRECTION");
if (direction && *direction != '\0')
{
if (strcmp (direction, "rtl") == 0)
dir = CLUTTER_TEXT_DIRECTION_RTL;
else if (strcmp (direction, "ltr") == 0)
dir = CLUTTER_TEXT_DIRECTION_LTR;
}
else
{
/* Re-use GTK+'s LTR/RTL handling */
const char *e = g_dgettext ("gtk30", "default:LTR");
if (strcmp (e, "default:RTL") == 0)
dir = CLUTTER_TEXT_DIRECTION_RTL;
else if (strcmp (e, "default:LTR") == 0)
dir = CLUTTER_TEXT_DIRECTION_LTR;
else
g_warning ("Whoever translated default:LTR did so wrongly.");
}
CLUTTER_NOTE (MISC, "Text direction: %s",
dir == CLUTTER_TEXT_DIRECTION_RTL ? "rtl" : "ltr");
return dir;
}
gboolean
_clutter_threads_dispatch (gpointer data)
{
ClutterThreadsDispatch *dispatch = data;
gboolean ret = FALSE;
if (!g_source_is_destroyed (g_main_current_source ()))
ret = dispatch->func (dispatch->data);
return ret;
}
void
_clutter_threads_dispatch_free (gpointer data)
{
ClutterThreadsDispatch *dispatch = data;
/* XXX - we cannot hold the thread lock here because the main loop
* might destroy a source while still in the dispatcher function; so
* knowing whether the lock is being held or not is not known a priori.
*
* see bug: http://bugzilla.gnome.org/show_bug.cgi?id=459555
*/
if (dispatch->notify)
dispatch->notify (dispatch->data);
g_slice_free (ClutterThreadsDispatch, dispatch);
}
/**
* clutter_threads_add_idle_full: (rename-to clutter_threads_add_idle)
* @priority: the priority of the timeout source. Typically this will be in the
* range between #G_PRIORITY_DEFAULT_IDLE and #G_PRIORITY_HIGH_IDLE
* @func: function to call
* @data: data to pass to the function
* @notify: functio to call when the idle source is removed
*
* Adds a function to be called whenever there are no higher priority
* events pending. If the function returns %FALSE it is automatically
* removed from the list of event sources and will not be called again.
*
* This function can be considered a thread-safe variant of g_idle_add_full():
* it will call @function while holding the Clutter lock. It is logically
* equivalent to the following implementation:
*
* |[
* static gboolean
* idle_safe_callback (gpointer data)
* {
* SafeClosure *closure = data;
* gboolean res = FALSE;
*
* // the callback does not need to acquire the Clutter
* / lock itself, as it is held by the this proxy handler
* //
* res = closure->callback (closure->data);
*
* return res;
* }
* static gulong
* add_safe_idle (GSourceFunc callback,
* gpointer data)
* {
* SafeClosure *closure = g_new0 (SafeClosure, 1);
*
* closure->callback = callback;
* closure->data = data;
*
* return g_idle_add_full (G_PRIORITY_DEFAULT_IDLE,
* idle_safe_callback,
* closure,
* g_free)
* }
*]|
*
* This function should be used by threaded applications to make sure
* that @func is emitted under the Clutter threads lock and invoked
* from the same thread that started the Clutter main loop. For instance,
* it can be used to update the UI using the results from a worker
* thread:
*
* |[
* static gboolean
* update_ui (gpointer data)
* {
* SomeClosure *closure = data;
*
* // it is safe to call Clutter API from this function because
* / it is invoked from the same thread that started the main
* / loop and under the Clutter thread lock
* //
* clutter_label_set_text (CLUTTER_LABEL (closure->label),
* closure->text);
*
* g_object_unref (closure->label);
* g_free (closure);
*
* return FALSE;
* }
*
* // within another thread //
* closure = g_new0 (SomeClosure, 1);
* // always take a reference on GObject instances //
* closure->label = g_object_ref (my_application->label);
* closure->text = g_strdup (processed_text_to_update_the_label);
*
* clutter_threads_add_idle_full (G_PRIORITY_HIGH_IDLE,
* update_ui,
* closure,
* NULL);
* ]|
*
* Return value: the ID (greater than 0) of the event source.
*
* Since: 0.4
*/
guint
clutter_threads_add_idle_full (gint priority,
GSourceFunc func,
gpointer data,
GDestroyNotify notify)
{
ClutterThreadsDispatch *dispatch;
g_return_val_if_fail (func != NULL, 0);
dispatch = g_slice_new (ClutterThreadsDispatch);
dispatch->func = func;
dispatch->data = data;
dispatch->notify = notify;
return g_idle_add_full (priority,
_clutter_threads_dispatch, dispatch,
_clutter_threads_dispatch_free);
}
/**
* clutter_threads_add_idle: (skip)
* @func: function to call
* @data: data to pass to the function
*
* Simple wrapper around clutter_threads_add_idle_full() using the
* default priority.
*
* Return value: the ID (greater than 0) of the event source.
*
* Since: 0.4
*/
guint
clutter_threads_add_idle (GSourceFunc func,
gpointer data)
{
g_return_val_if_fail (func != NULL, 0);
return clutter_threads_add_idle_full (G_PRIORITY_DEFAULT_IDLE,
func, data,
NULL);
}
/**
* clutter_threads_add_timeout_full: (rename-to clutter_threads_add_timeout)
* @priority: the priority of the timeout source. Typically this will be in the
* range between #G_PRIORITY_DEFAULT and #G_PRIORITY_HIGH.
* @interval: the time between calls to the function, in milliseconds
* @func: function to call
* @data: data to pass to the function
* @notify: function to call when the timeout source is removed
*
* Sets a function to be called at regular intervals holding the Clutter
* threads lock, with the given priority. The function is called repeatedly
* until it returns %FALSE, at which point the timeout is automatically
* removed and the function will not be called again. The @notify function
* is called when the timeout is removed.
*
* The first call to the function will be at the end of the first @interval.
*
* It is important to note that, due to how the Clutter main loop is
* implemented, the timing will not be accurate and it will not try to
* "keep up" with the interval.
*
* See also clutter_threads_add_idle_full().
*
* Return value: the ID (greater than 0) of the event source.
*
* Since: 0.4
*/
guint
clutter_threads_add_timeout_full (gint priority,
guint interval,
GSourceFunc func,
gpointer data,
GDestroyNotify notify)
{
ClutterThreadsDispatch *dispatch;
g_return_val_if_fail (func != NULL, 0);
dispatch = g_slice_new (ClutterThreadsDispatch);
dispatch->func = func;
dispatch->data = data;
dispatch->notify = notify;
return g_timeout_add_full (priority,
interval,
_clutter_threads_dispatch, dispatch,
_clutter_threads_dispatch_free);
}
/**
* clutter_threads_add_timeout: (skip)
* @interval: the time between calls to the function, in milliseconds
* @func: function to call
* @data: data to pass to the function
*
* Simple wrapper around clutter_threads_add_timeout_full().
*
* Return value: the ID (greater than 0) of the event source.
*
* Since: 0.4
*/
guint
clutter_threads_add_timeout (guint interval,
GSourceFunc func,
gpointer data)
{
g_return_val_if_fail (func != NULL, 0);
return clutter_threads_add_timeout_full (G_PRIORITY_DEFAULT,
interval,
func, data,
NULL);
}
gboolean
_clutter_context_is_initialized (void)
{
if (ClutterCntx == NULL)
return FALSE;
return ClutterCntx->is_initialized;
}
ClutterMainContext *
_clutter_context_get_default (void)
{
if (G_UNLIKELY (ClutterCntx == NULL))
{
ClutterMainContext *ctx;
/* Read the configuration file, if any, before we set up the
* whole thing, so that we can override things like the backend
* and the driver
*/
clutter_config_read ();
ClutterCntx = ctx = g_new0 (ClutterMainContext, 1);
ctx->is_initialized = FALSE;
/* create the windowing system backend */
ctx->backend = _clutter_create_backend ();
/* create the default settings object, and store a back pointer to
* the backend singleton
*/
ctx->settings = clutter_settings_get_default ();
_clutter_settings_set_backend (ctx->settings, ctx->backend);
ctx->events_queue = g_async_queue_new ();
ctx->last_repaint_id = 1;
}
return ClutterCntx;
}
static gboolean
clutter_arg_direction_cb (const char *key,
const char *value,
gpointer user_data)
{
clutter_text_direction =
(strcmp (value, "rtl") == 0) ? CLUTTER_TEXT_DIRECTION_RTL
: CLUTTER_TEXT_DIRECTION_LTR;
return TRUE;
}
#ifdef CLUTTER_ENABLE_DEBUG
static gboolean
clutter_arg_debug_cb (const char *key,
const char *value,
gpointer user_data)
{
clutter_debug_flags |=
g_parse_debug_string (value,
clutter_debug_keys,
G_N_ELEMENTS (clutter_debug_keys));
return TRUE;
}
static gboolean
clutter_arg_no_debug_cb (const char *key,
const char *value,
gpointer user_data)
{
clutter_debug_flags &=
~g_parse_debug_string (value,
clutter_debug_keys,
G_N_ELEMENTS (clutter_debug_keys));
return TRUE;
}
#endif /* CLUTTER_ENABLE_DEBUG */
GQuark
clutter_init_error_quark (void)
{
return g_quark_from_static_string ("clutter-init-error-quark");
}
static ClutterInitError
clutter_init_real (GError **error)
{
ClutterMainContext *ctx;
ClutterBackend *backend;
/* Note, creates backend if not already existing, though parse args will
* have likely created it
*/
ctx = _clutter_context_get_default ();
backend = ctx->backend;
if (!ctx->options_parsed)
{
if (error)
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_INTERNAL,
"When using clutter_get_option_group_without_init() "
"you must parse options before calling clutter_init()");
else
g_critical ("When using clutter_get_option_group_without_init() "
"you must parse options before calling clutter_init()");
return CLUTTER_INIT_ERROR_INTERNAL;
}
/*
* Call backend post parse hooks.
*/
if (!_clutter_backend_post_parse (backend, error))
return CLUTTER_INIT_ERROR_BACKEND;
/* If we are displaying the regions that would get redrawn with clipped
* redraws enabled we actually have to disable the clipped redrawing
* because otherwise we end up with nasty trails of rectangles everywhere.
*/
if (clutter_paint_debug_flags & CLUTTER_DEBUG_REDRAWS)
clutter_paint_debug_flags |= CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS;
/* The same is true when drawing the outlines of paint volumes... */
if (clutter_paint_debug_flags & CLUTTER_DEBUG_PAINT_VOLUMES)
{
clutter_paint_debug_flags |=
CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS | CLUTTER_DEBUG_DISABLE_CULLING;
}
if (clutter_paint_debug_flags & CLUTTER_DEBUG_PAINT_DAMAGE_REGION)
g_message ("Enabling damaged region");
/* this will take care of initializing Cogl's state and
* query the GL machinery for features
*/
if (!_clutter_feature_init (error))
return CLUTTER_INIT_ERROR_BACKEND;
clutter_text_direction = clutter_get_text_direction ();
/* Initiate event collection */
_clutter_backend_init_events (ctx->backend);
clutter_is_initialized = TRUE;
ctx->is_initialized = TRUE;
/* Initialize a11y */
if (clutter_enable_accessibility)
cally_accessibility_init ();
/* Initialize types required for paint nodes */
_clutter_paint_node_init_types ();
return CLUTTER_INIT_SUCCESS;
}
static GOptionEntry clutter_args[] = {
{ "clutter-show-fps", 0, 0, G_OPTION_ARG_NONE, &clutter_show_fps,
N_("Show frames per second"), NULL },
{ "clutter-default-fps", 0, 0, G_OPTION_ARG_INT, &clutter_default_fps,
N_("Default frame rate"), "FPS" },
{ "g-fatal-warnings", 0, 0, G_OPTION_ARG_NONE, &clutter_fatal_warnings,
N_("Make all warnings fatal"), NULL },
{ "clutter-text-direction", 0, 0, G_OPTION_ARG_CALLBACK,
clutter_arg_direction_cb,
N_("Direction for the text"), "DIRECTION" },
{ "clutter-disable-mipmapped-text", 0, 0, G_OPTION_ARG_NONE,
&clutter_disable_mipmap_text,
N_("Disable mipmapping on text"), NULL },
#ifdef CLUTTER_ENABLE_DEBUG
{ "clutter-debug", 0, 0, G_OPTION_ARG_CALLBACK, clutter_arg_debug_cb,
N_("Clutter debugging flags to set"), "FLAGS" },
{ "clutter-no-debug", 0, 0, G_OPTION_ARG_CALLBACK, clutter_arg_no_debug_cb,
N_("Clutter debugging flags to unset"), "FLAGS" },
#endif /* CLUTTER_ENABLE_DEBUG */
{ "clutter-enable-accessibility", 0, 0, G_OPTION_ARG_NONE, &clutter_enable_accessibility,
N_("Enable accessibility"), NULL },
{ NULL, },
};
/* pre_parse_hook: initialise variables depending on environment
* variables; these variables might be overridden by the command
* line arguments that are going to be parsed after.
*/
static gboolean
pre_parse_hook (GOptionContext *context,
GOptionGroup *group,
gpointer data,
GError **error)
{
ClutterMainContext *clutter_context;
ClutterBackend *backend;
const char *env_string;
if (clutter_is_initialized)
return TRUE;
clutter_context = _clutter_context_get_default ();
backend = clutter_context->backend;
g_assert (CLUTTER_IS_BACKEND (backend));
#ifdef CLUTTER_ENABLE_DEBUG
env_string = g_getenv ("CLUTTER_DEBUG");
if (env_string != NULL)
{
clutter_debug_flags =
g_parse_debug_string (env_string,
clutter_debug_keys,
G_N_ELEMENTS (clutter_debug_keys));
env_string = NULL;
}
#endif /* CLUTTER_ENABLE_DEBUG */
env_string = g_getenv ("CLUTTER_PICK");
if (env_string != NULL)
{
clutter_pick_debug_flags =
g_parse_debug_string (env_string,
clutter_pick_debug_keys,
G_N_ELEMENTS (clutter_pick_debug_keys));
env_string = NULL;
}
env_string = g_getenv ("CLUTTER_PAINT");
if (env_string != NULL)
{
clutter_paint_debug_flags =
g_parse_debug_string (env_string,
clutter_paint_debug_keys,
G_N_ELEMENTS (clutter_paint_debug_keys));
env_string = NULL;
}
env_string = g_getenv ("CLUTTER_SHOW_FPS");
if (env_string)
clutter_show_fps = TRUE;
env_string = g_getenv ("CLUTTER_DEFAULT_FPS");
if (env_string)
{
gint default_fps = g_ascii_strtoll (env_string, NULL, 10);
clutter_default_fps = CLAMP (default_fps, 1, 1000);
}
env_string = g_getenv ("CLUTTER_DISABLE_MIPMAPPED_TEXT");
if (env_string)
clutter_disable_mipmap_text = TRUE;
return _clutter_backend_pre_parse (backend, error);
}
/* post_parse_hook: initialise the context and data structures
* and opens the X display
*/
static gboolean
post_parse_hook (GOptionContext *context,
GOptionGroup *group,
gpointer data,
GError **error)
{
ClutterMainContext *clutter_context;
ClutterBackend *backend;
if (clutter_is_initialized)
return TRUE;
clutter_context = _clutter_context_get_default ();
backend = clutter_context->backend;
g_assert (CLUTTER_IS_BACKEND (backend));
if (clutter_fatal_warnings)
{
GLogLevelFlags fatal_mask;
fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
g_log_set_always_fatal (fatal_mask);
}
clutter_context->frame_rate = clutter_default_fps;
clutter_context->show_fps = clutter_show_fps;
clutter_context->options_parsed = TRUE;
/* If not asked to defer display setup, call clutter_init_real(),
* which in turn calls the backend post parse hooks.
*/
if (!clutter_context->defer_display_setup)
return clutter_init_real (error) == CLUTTER_INIT_SUCCESS;
return TRUE;
}
/**
* clutter_get_option_group: (skip)
*
* Returns a #GOptionGroup for the command line arguments recognized
* by Clutter. You should add this group to your #GOptionContext with
* g_option_context_add_group(), if you are using g_option_context_parse()
* to parse your commandline arguments.
*
* Calling g_option_context_parse() with Clutter's #GOptionGroup will result
* in Clutter's initialization. That is, the following code:
*
* |[
* g_option_context_set_main_group (context, clutter_get_option_group ());
* res = g_option_context_parse (context, &argc, &argc, NULL);
* ]|
*
* is functionally equivalent to:
*
* |[
* clutter_init (&argc, &argv);
* ]|
*
* After g_option_context_parse() on a #GOptionContext containing the
* Clutter #GOptionGroup has returned %TRUE, Clutter is guaranteed to be
* initialized.
*
* Return value: (transfer full): a #GOptionGroup for the commandline arguments
* recognized by Clutter
*
* Since: 0.2
*/
GOptionGroup *
clutter_get_option_group (void)
{
ClutterMainContext *context;
GOptionGroup *group;
clutter_base_init ();
context = _clutter_context_get_default ();
group = g_option_group_new ("clutter",
"Clutter Options",
"Show Clutter Options",
NULL,
NULL);
g_option_group_set_parse_hooks (group, pre_parse_hook, post_parse_hook);
g_option_group_add_entries (group, clutter_args);
/* add backend-specific options */
_clutter_backend_add_options (context->backend, group);
return group;
}
/**
* clutter_get_option_group_without_init: (skip)
*
* Returns a #GOptionGroup for the command line arguments recognized
* by Clutter. You should add this group to your #GOptionContext with
* g_option_context_add_group(), if you are using g_option_context_parse()
* to parse your commandline arguments.
*
* Unlike clutter_get_option_group(), calling g_option_context_parse() with
* the #GOptionGroup returned by this function requires a subsequent explicit
* call to clutter_init(); use this function when needing to set foreign
* display connection with clutter_x11_set_display(), or with
* `gtk_clutter_init()`.
*
* Return value: (transfer full): a #GOptionGroup for the commandline arguments
* recognized by Clutter
*
* Since: 0.8
*/
GOptionGroup *
clutter_get_option_group_without_init (void)
{
ClutterMainContext *context;
GOptionGroup *group;
clutter_base_init ();
context = _clutter_context_get_default ();
context->defer_display_setup = TRUE;
group = clutter_get_option_group ();
return group;
}
/* Note that the gobject-introspection annotations for the argc/argv
* parameters do not produce the right result; however, they do
* allow the common case of argc=NULL, argv=NULL to work.
*/
/**
* clutter_init_with_args:
* @argc: (inout): a pointer to the number of command line arguments
* @argv: (array length=argc) (inout) (allow-none): a pointer to the array
* of command line arguments
* @parameter_string: (allow-none): a string which is displayed in the
* first line of <option>--help</option> output, after
* <literal><replaceable>programname</replaceable> [OPTION...]</literal>
* @entries: (array) (allow-none): a %NULL terminated array of
* #GOptionEntry<!-- -->s describing the options of your program
* @translation_domain: (allow-none): a translation domain to use for
* translating the <option>--help</option> output for the options in
* @entries with gettext(), or %NULL
* @error: (allow-none): a return location for a #GError
*
* This function does the same work as clutter_init(). Additionally,
* it allows you to add your own command line options, and it
* automatically generates nicely formatted <option>--help</option>
* output. Note that your program will be terminated after writing
* out the help output. Also note that, in case of error, the
* error message will be placed inside @error instead of being
* printed on the display.
*
* Just like clutter_init(), if this function returns an error code then
* any subsequent call to any other Clutter API will result in undefined
* behaviour - including segmentation faults.
*
* Return value: %CLUTTER_INIT_SUCCESS if Clutter has been successfully
* initialised, or other values or #ClutterInitError in case of
* error.
*
* Since: 0.2
*/
ClutterInitError
clutter_init_with_args (int *argc,
char ***argv,
const char *parameter_string,
GOptionEntry *entries,
const char *translation_domain,
GError **error)
{
GOptionContext *context;
GOptionGroup *group;
gboolean res;
ClutterMainContext *ctx;
if (clutter_is_initialized)
return CLUTTER_INIT_SUCCESS;
clutter_base_init ();
ctx = _clutter_context_get_default ();
if (!ctx->defer_display_setup)
{
#if 0
if (argc && *argc > 0 && *argv)
g_set_prgname ((*argv)[0]);
#endif
context = g_option_context_new (parameter_string);
group = clutter_get_option_group ();
g_option_context_add_group (context, group);
group = cogl_get_option_group ();
g_option_context_add_group (context, group);
if (entries)
g_option_context_add_main_entries (context, entries, translation_domain);
res = g_option_context_parse (context, argc, argv, error);
g_option_context_free (context);
/* if res is FALSE, the error is filled for
* us by g_option_context_parse()
*/
if (!res)
{
/* if there has been an error in the initialization, the
* error id will be preserved inside the GError code
*/
if (error && *error)
return (*error)->code;
else
return CLUTTER_INIT_ERROR_INTERNAL;
}
return CLUTTER_INIT_SUCCESS;
}
else
return clutter_init_real (error);
}
static gboolean
clutter_parse_args (int *argc,
char ***argv,
GError **error)
{
GOptionContext *option_context;
GOptionGroup *clutter_group, *cogl_group;
GError *internal_error = NULL;
gboolean ret = TRUE;
if (clutter_is_initialized)
return TRUE;
option_context = g_option_context_new (NULL);
g_option_context_set_ignore_unknown_options (option_context, TRUE);
g_option_context_set_help_enabled (option_context, FALSE);
/* Initiate any command line options from the backend */
clutter_group = clutter_get_option_group ();
g_option_context_set_main_group (option_context, clutter_group);
cogl_group = cogl_get_option_group ();
g_option_context_add_group (option_context, cogl_group);
if (!g_option_context_parse (option_context, argc, argv, &internal_error))
{
g_propagate_error (error, internal_error);
ret = FALSE;
}
g_option_context_free (option_context);
return ret;
}
/**
* clutter_init:
* @argc: (inout): The number of arguments in @argv
* @argv: (array length=argc) (inout) (allow-none): A pointer to an array
* of arguments.
*
* Initialises everything needed to operate with Clutter and parses some
* standard command line options; @argc and @argv are adjusted accordingly
* so your own code will never see those standard arguments.
*
* It is safe to call this function multiple times.
*
* This function will not abort in case of errors during
* initialization; clutter_init() will print out the error message on
* stderr, and will return an error code. It is up to the application
* code to handle this case. If you need to display the error message
* yourself, you can use clutter_init_with_args(), which takes a #GError
* pointer.
*
* If this function fails, and returns an error code, any subsequent
* Clutter API will have undefined behaviour - including segmentation
* faults and assertion failures. Make sure to handle the returned
* #ClutterInitError enumeration value.
*
* Return value: a #ClutterInitError value
*/
ClutterInitError
clutter_init (int *argc,
char ***argv)
{
ClutterMainContext *ctx;
GError *error = NULL;
ClutterInitError res;
if (clutter_is_initialized)
return CLUTTER_INIT_SUCCESS;
clutter_base_init ();
ctx = _clutter_context_get_default ();
if (!ctx->defer_display_setup)
{
#if 0
if (argc && *argc > 0 && *argv)
g_set_prgname ((*argv)[0]);
#endif
/* parse_args will trigger backend creation and things like
* DISPLAY connection etc.
*/
if (!clutter_parse_args (argc, argv, &error))
{
g_critical ("Unable to initialize Clutter: %s", error->message);
g_error_free (error);
res = CLUTTER_INIT_ERROR_INTERNAL;
}
else
res = CLUTTER_INIT_SUCCESS;
}
else
{
res = clutter_init_real (&error);
if (error != NULL)
{
g_critical ("Unable to initialize Clutter: %s", error->message);
g_error_free (error);
}
}
return res;
}
gboolean
_clutter_boolean_handled_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer dummy)
{
gboolean continue_emission;
gboolean signal_handled;
signal_handled = g_value_get_boolean (handler_return);
g_value_set_boolean (return_accu, signal_handled);
continue_emission = !signal_handled;
return continue_emission;
}
gboolean
_clutter_boolean_continue_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer dummy)
{
gboolean continue_emission;
continue_emission = g_value_get_boolean (handler_return);
g_value_set_boolean (return_accu, continue_emission);
return continue_emission;
}
static void
event_click_count_generate (ClutterEvent *event)
{
/* multiple button click detection */
static gint click_count = 0;
static gint previous_x = -1;
static gint previous_y = -1;
static guint32 previous_time = 0;
static gint previous_button_number = -1;
ClutterInputDevice *device = NULL;
ClutterSettings *settings;
guint double_click_time;
guint double_click_distance;
settings = clutter_settings_get_default ();
g_object_get (settings,
"double-click-distance", &double_click_distance,
"double-click-time", &double_click_time,
NULL);
device = clutter_event_get_device (event);
if (device != NULL)
{
click_count = device->click_count;
previous_x = device->previous_x;
previous_y = device->previous_y;
previous_time = device->previous_time;
previous_button_number = device->previous_button_number;
CLUTTER_NOTE (EVENT,
"Restoring previous click count:%d (device:%s, time:%u)",
click_count,
clutter_input_device_get_device_name (device),
previous_time);
}
else
{
CLUTTER_NOTE (EVENT,
"Restoring previous click count:%d (time:%u)",
click_count,
previous_time);
}
switch (clutter_event_type (event))
{
case CLUTTER_BUTTON_PRESS:
/* check if we are in time and within distance to increment an
* existing click count
*/
if (event->button.button == previous_button_number &&
event->button.time < (previous_time + double_click_time) &&
(ABS (event->button.x - previous_x) <= double_click_distance) &&
(ABS (event->button.y - previous_y) <= double_click_distance))
{
CLUTTER_NOTE (EVENT, "Increase click count (button: %d, time: %u)",
event->button.button,
event->button.time);
click_count += 1;
}
else /* start a new click count*/
{
CLUTTER_NOTE (EVENT, "Reset click count (button: %d, time: %u)",
event->button.button,
event->button.time);
click_count = 1;
previous_button_number = event->button.button;
}
previous_x = event->button.x;
previous_y = event->button.y;
previous_time = event->button.time;
G_GNUC_FALLTHROUGH;
case CLUTTER_BUTTON_RELEASE:
event->button.click_count = click_count;
break;
default:
g_assert_not_reached ();
break;
}
if (event->type == CLUTTER_BUTTON_PRESS && device != NULL)
{
CLUTTER_NOTE (EVENT, "Storing click count: %d (device:%s, time:%u)",
click_count,
clutter_input_device_get_device_name (device),
previous_time);
device->click_count = click_count;
device->previous_x = previous_x;
device->previous_y = previous_y;
device->previous_time = previous_time;
device->previous_button_number = previous_button_number;
}
}
static inline void
emit_event_chain (ClutterEvent *event)
{
if (event->any.source == NULL)
{
CLUTTER_NOTE (EVENT, "No source set, discarding event");
return;
}
_clutter_actor_handle_event (event->any.source, event);
}
/*
* Emits a pointer event after having prepared the event for delivery (setting
* source, computing click_count, generating enter/leave etc.).
*/
static inline void
emit_pointer_event (ClutterEvent *event,
ClutterInputDevice *device)
{
if (_clutter_event_process_filters (event))
return;
if (device != NULL && device->pointer_grab_actor != NULL)
clutter_actor_event (device->pointer_grab_actor, event, FALSE);
else
emit_event_chain (event);
}
static inline void
emit_crossing_event (ClutterEvent *event,
ClutterInputDevice *device)
{
ClutterEventSequence *sequence = clutter_event_get_event_sequence (event);
ClutterActor *grab_actor = NULL;
if (_clutter_event_process_filters (event))
return;
if (sequence)
{
if (device->sequence_grab_actors != NULL)
grab_actor = g_hash_table_lookup (device->sequence_grab_actors, sequence);
}
else
{
if (device != NULL && device->pointer_grab_actor != NULL)
grab_actor = device->pointer_grab_actor;
}
if (grab_actor != NULL)
clutter_actor_event (grab_actor, event, FALSE);
else
emit_event_chain (event);
}
static inline void
emit_touch_event (ClutterEvent *event,
ClutterInputDevice *device)
{
ClutterActor *grab_actor = NULL;
if (_clutter_event_process_filters (event))
return;
if (device->sequence_grab_actors != NULL)
{
grab_actor = g_hash_table_lookup (device->sequence_grab_actors,
event->touch.sequence);
}
if (grab_actor != NULL)
{
/* per-device sequence grab */
clutter_actor_event (grab_actor, event, FALSE);
}
else
{
/* no grab, time to capture and bubble */
emit_event_chain (event);
}
}
static inline void
process_key_event (ClutterEvent *event,
ClutterInputDevice *device)
{
if (_clutter_event_process_filters (event))
return;
if (device != NULL && device->keyboard_grab_actor != NULL)
clutter_actor_event (device->keyboard_grab_actor, event, FALSE);
else
emit_event_chain (event);
}
static gboolean
is_off_stage (ClutterActor *stage,
gfloat x,
gfloat y)
{
gfloat width, height;
clutter_actor_get_size (stage, &width, &height);
return (x < 0 ||
y < 0 ||
x >= width ||
y >= height);
}
/**
* clutter_do_event:
* @event: a #ClutterEvent.
*
* Processes an event.
*
* The @event must be a valid #ClutterEvent and have a #ClutterStage
* associated to it.
*
* This function is only useful when embedding Clutter inside another
* toolkit, and it should never be called by applications.
*
* Since: 0.4
*/
void
clutter_do_event (ClutterEvent *event)
{
/* we need the stage for the event */
if (event->any.stage == NULL)
{
g_warning ("%s: Event does not have a stage: discarding.", G_STRFUNC);
return;
}
/* stages in destruction do not process events */
if (CLUTTER_ACTOR_IN_DESTRUCTION (event->any.stage))
return;
/* Instead of processing events when received, we queue them up to
* handle per-frame before animations, layout, and drawing.
*
* This gives us the chance to reliably compress motion events
* because we've "looked ahead" and know all motion events that
* will occur before drawing the frame.
*/
_clutter_stage_queue_event (event->any.stage, event, TRUE);
}
static void
create_crossing_event (ClutterStage *stage,
ClutterInputDevice *device,
ClutterEventSequence *sequence,
ClutterEventType event_type,
ClutterActor *source,
ClutterActor *related,
graphene_point_t coords,
uint32_t time)
{
ClutterEvent *event;
event = clutter_event_new (event_type);
event->crossing.time = time;
event->crossing.flags = 0;
event->crossing.stage = stage;
event->crossing.source = source;
event->crossing.x = coords.x;
event->crossing.y = coords.y;
event->crossing.related = related;
event->crossing.sequence = sequence;
clutter_event_set_device (event, device);
/* we need to make sure that this event is processed
* before any other event we might have queued up until
* now, so we go on, and synthesize the event emission
* ourselves
*/
_clutter_process_event (event);
clutter_event_free (event);
}
void
clutter_stage_update_device (ClutterStage *stage,
ClutterInputDevice *device,
ClutterEventSequence *sequence,
graphene_point_t point,
uint32_t time,
ClutterActor *new_actor,
gboolean emit_crossing)
{
ClutterInputDeviceType device_type;
ClutterActor *old_actor;
gboolean device_actor_changed;
device_type = clutter_input_device_get_device_type (device);
g_assert (device_type != CLUTTER_KEYBOARD_DEVICE &&
device_type != CLUTTER_PAD_DEVICE);
old_actor = clutter_stage_get_device_actor (stage, device, sequence);
device_actor_changed = new_actor != old_actor;
clutter_stage_update_device_entry (stage,
device, sequence,
point,
new_actor);
if (device_actor_changed)
{
CLUTTER_NOTE (EVENT,
"Updating actor under cursor (device %s, at %.2f, %.2f): %s",
clutter_input_device_get_device_name (device),
point.x,
point.y,
_clutter_actor_get_debug_name (new_actor));
if (old_actor && emit_crossing)
{
create_crossing_event (stage,
device, sequence,
CLUTTER_LEAVE,
old_actor, new_actor,
point, time);
}
if (new_actor && emit_crossing)
{
create_crossing_event (stage,
device, sequence,
CLUTTER_ENTER,
new_actor, old_actor,
point, time);
}
}
}
void
clutter_stage_repick_device (ClutterStage *stage,
ClutterInputDevice *device)
{
graphene_point_t point;
ClutterActor *new_actor;
clutter_stage_get_device_coords (stage, device, NULL, &point);
new_actor =
clutter_stage_get_actor_at_pos (stage, CLUTTER_PICK_REACTIVE,
point.x, point.y);
clutter_stage_update_device (stage,
device, NULL,
point,
CLUTTER_CURRENT_TIME,
new_actor,
TRUE);
}
static ClutterActor *
update_device_for_event (ClutterStage *stage,
ClutterEvent *event,
gboolean emit_crossing)
{
ClutterInputDevice *device = clutter_event_get_device (event);
ClutterEventSequence *sequence = clutter_event_get_event_sequence (event);
ClutterActor *new_actor;
graphene_point_t point;
uint32_t time;
clutter_event_get_coords (event, &point.x, &point.y);
time = clutter_event_get_time (event);
new_actor =
_clutter_stage_do_pick (stage, point.x, point.y, CLUTTER_PICK_REACTIVE);
/* Picking should never fail, but if it does, we bail out here */
g_return_val_if_fail (new_actor != NULL, NULL);
clutter_stage_update_device (stage,
device, sequence,
point,
time,
new_actor,
emit_crossing);
return new_actor;
}
static void
remove_device_for_event (ClutterStage *stage,
ClutterEvent *event,
gboolean emit_crossing)
{
ClutterInputDevice *device = clutter_event_get_device (event);
ClutterEventSequence *sequence = clutter_event_get_event_sequence (event);
graphene_point_t point;
uint32_t time;
clutter_event_get_coords (event, &point.x, &point.y);
time = clutter_event_get_time (event);
clutter_stage_update_device (stage,
device, sequence,
point,
time,
NULL,
TRUE);
clutter_stage_remove_device_entry (stage, device, sequence);
}
static void
_clutter_process_event_details (ClutterActor *stage,
ClutterMainContext *context,
ClutterEvent *event)
{
ClutterInputDevice *device = clutter_event_get_device (event);
ClutterMainContext *clutter_context;
ClutterBackend *backend;
clutter_context = _clutter_context_get_default ();
backend = clutter_context->backend;
switch (event->type)
{
case CLUTTER_NOTHING:
event->any.source = stage;
break;
case CLUTTER_KEY_PRESS:
case CLUTTER_KEY_RELEASE:
case CLUTTER_PAD_BUTTON_PRESS:
case CLUTTER_PAD_BUTTON_RELEASE:
case CLUTTER_PAD_STRIP:
case CLUTTER_PAD_RING:
case CLUTTER_IM_COMMIT:
case CLUTTER_IM_DELETE:
case CLUTTER_IM_PREEDIT:
{
ClutterActor *actor = NULL;
/* check that we're not a synthetic event with source set */
if (event->any.source == NULL)
{
actor = clutter_stage_get_key_focus (CLUTTER_STAGE (stage));
event->any.source = actor;
if (G_UNLIKELY (actor == NULL))
{
g_warning ("No key focus set, discarding");
return;
}
}
process_key_event (event, device);
}
break;
case CLUTTER_ENTER:
/* if we're entering from outside the stage we need
* to check whether the pointer is actually on another
* actor, and emit an additional pointer event
*/
if (event->any.source == stage &&
event->crossing.related == NULL)
{
ClutterActor *actor = NULL;
emit_crossing_event (event, device);
actor = update_device_for_event (CLUTTER_STAGE (stage), event, FALSE);
if (actor != stage)
{
ClutterEvent *crossing;
/* we emit the exact same event on the actor */
crossing = clutter_event_copy (event);
crossing->crossing.related = stage;
crossing->crossing.source = actor;
emit_crossing_event (crossing, device);
clutter_event_free (crossing);
}
}
else
emit_crossing_event (event, device);
break;
case CLUTTER_LEAVE:
/* same as CLUTTER_ENTER above: when leaving the stage
* we need to also emit a CLUTTER_LEAVE event on the
* actor currently underneath the device, unless it's the
* stage
*/
if (event->any.source == stage &&
event->crossing.related == NULL &&
clutter_stage_get_device_actor (CLUTTER_STAGE (stage), device, NULL) != stage)
{
ClutterEvent *crossing;
crossing = clutter_event_copy (event);
crossing->crossing.related = stage;
crossing->crossing.source =
clutter_stage_get_device_actor (CLUTTER_STAGE (stage), device, NULL);
emit_crossing_event (crossing, device);
clutter_event_free (crossing);
}
emit_crossing_event (event, device);
break;
case CLUTTER_MOTION:
if (clutter_backend_is_display_server (backend) &&
!(event->any.flags & CLUTTER_EVENT_FLAG_SYNTHETIC))
{
if (_clutter_is_input_pointer_a11y_enabled (device))
{
gfloat x, y;
clutter_event_get_coords (event, &x, &y);
_clutter_input_pointer_a11y_on_motion_event (device, x, y);
}
}
/* only the stage gets motion events if they are enabled */
if (!clutter_stage_get_motion_events_enabled (CLUTTER_STAGE (stage)) &&
event->any.source == NULL)
{
/* Only stage gets motion events */
event->any.source = stage;
if (_clutter_event_process_filters (event))
break;
if (device != NULL && device->pointer_grab_actor != NULL)
{
clutter_actor_event (device->pointer_grab_actor,
event,
FALSE);
break;
}
/* Trigger handlers on stage in both capture .. */
if (!clutter_actor_event (stage, event, TRUE))
{
/* and bubbling phase */
clutter_actor_event (stage, event, FALSE);
}
break;
}
G_GNUC_FALLTHROUGH;
case CLUTTER_BUTTON_PRESS:
case CLUTTER_BUTTON_RELEASE:
if (clutter_backend_is_display_server (backend))
{
if (_clutter_is_input_pointer_a11y_enabled (device) && (event->type != CLUTTER_MOTION))
{
_clutter_input_pointer_a11y_on_button_event (device,
event->button.button,
event->type == CLUTTER_BUTTON_PRESS);
}
}
case CLUTTER_SCROLL:
case CLUTTER_TOUCHPAD_PINCH:
case CLUTTER_TOUCHPAD_SWIPE:
{
ClutterActor *actor;
gfloat x, y;
clutter_event_get_coords (event, &x, &y);
/* Only do a pick to find the source if source is not already set
* (as it could be in a synthetic event)
*/
if (event->any.source == NULL)
{
/* emulate X11 the implicit soft grab; the implicit soft grab
* keeps relaying motion events when the stage is left with a
* pointer button pressed. since this is what happens when we
* disable per-actor motion events we need to maintain the same
* behaviour when the per-actor motion events are enabled as
* well
*/
if (is_off_stage (stage, x, y))
{
if (event->type == CLUTTER_BUTTON_RELEASE)
{
CLUTTER_NOTE (EVENT,
"Release off stage received at %.2f, %.2f",
x, y);
event->button.source = stage;
event->button.click_count = 1;
emit_pointer_event (event, device);
}
else if (event->type == CLUTTER_MOTION)
{
CLUTTER_NOTE (EVENT,
"Motion off stage received at %.2f, %2.f",
x, y);
event->motion.source = stage;
emit_pointer_event (event, device);
}
break;
}
actor = update_device_for_event (CLUTTER_STAGE (stage), event, TRUE);
if (actor == NULL)
break;
event->any.source = actor;
}
else
{
/* use the source already set in the synthetic event */
actor = event->any.source;
}
CLUTTER_NOTE (EVENT,
"Reactive event received at %.2f, %.2f - actor: %p",
x, y,
actor);
/* button presses and releases need a click count */
if (event->type == CLUTTER_BUTTON_PRESS ||
event->type == CLUTTER_BUTTON_RELEASE)
{
/* Generate click count */
event_click_count_generate (event);
}
emit_pointer_event (event, device);
break;
}
case CLUTTER_TOUCH_UPDATE:
/* only the stage gets motion events if they are enabled */
if (!clutter_stage_get_motion_events_enabled (CLUTTER_STAGE (stage)) &&
event->any.source == NULL)
{
ClutterActor *grab_actor = NULL;
/* Only stage gets motion events */
event->any.source = stage;
if (_clutter_event_process_filters (event))
break;
/* global grabs */
if (device->sequence_grab_actors != NULL)
{
grab_actor = g_hash_table_lookup (device->sequence_grab_actors,
event->touch.sequence);
}
if (grab_actor != NULL)
{
clutter_actor_event (grab_actor, event, FALSE);
break;
}
/* Trigger handlers on stage in both capture .. */
if (!clutter_actor_event (stage, event, TRUE))
{
/* and bubbling phase */
clutter_actor_event (stage, event, FALSE);
}
break;
}
G_GNUC_FALLTHROUGH;
case CLUTTER_TOUCH_BEGIN:
case CLUTTER_TOUCH_CANCEL:
case CLUTTER_TOUCH_END:
{
ClutterActor *actor;
gfloat x, y;
clutter_event_get_coords (event, &x, &y);
/* Only do a pick to find the source if source is not already set
* (as it could be in a synthetic event)
*/
if (event->any.source == NULL)
{
/* same as the mouse events above, emulate the X11 implicit
* soft grab */
if (is_off_stage (stage, x, y))
{
CLUTTER_NOTE (EVENT,
"Touch %s off stage received at %.2f, %.2f",
event->type == CLUTTER_TOUCH_UPDATE ? "update" :
event->type == CLUTTER_TOUCH_END ? "end" :
event->type == CLUTTER_TOUCH_CANCEL ? "cancel" :
"?", x, y);
event->touch.source = stage;
emit_touch_event (event, device);
if (event->type == CLUTTER_TOUCH_END ||
event->type == CLUTTER_TOUCH_CANCEL)
remove_device_for_event (CLUTTER_STAGE (stage), event, TRUE);
break;
}
actor = update_device_for_event (CLUTTER_STAGE (stage), event, TRUE);
if (actor == NULL)
break;
event->any.source = actor;
}
else
{
/* use the source already set in the synthetic event */
actor = event->any.source;
}
CLUTTER_NOTE (EVENT,
"Reactive event received at %.2f, %.2f - actor: %p",
x, y,
actor);
emit_touch_event (event, device);
if (event->type == CLUTTER_TOUCH_END ||
event->type == CLUTTER_TOUCH_CANCEL)
remove_device_for_event (CLUTTER_STAGE (stage), event, TRUE);
break;
}
case CLUTTER_PROXIMITY_IN:
case CLUTTER_PROXIMITY_OUT:
if (_clutter_event_process_filters (event))
break;
if (!clutter_actor_event (stage, event, TRUE))
{
/* and bubbling phase */
clutter_actor_event (stage, event, FALSE);
}
break;
case CLUTTER_DEVICE_ADDED:
_clutter_event_process_filters (event);
break;
case CLUTTER_DEVICE_REMOVED:
{
ClutterInputDeviceType device_type;
_clutter_event_process_filters (event);
device_type = clutter_input_device_get_device_type (device);
if (device_type == CLUTTER_POINTER_DEVICE ||
device_type == CLUTTER_TABLET_DEVICE ||
device_type == CLUTTER_PEN_DEVICE ||
device_type == CLUTTER_ERASER_DEVICE ||
device_type == CLUTTER_CURSOR_DEVICE)
remove_device_for_event (CLUTTER_STAGE (stage), event, TRUE);
break;
}
case CLUTTER_EVENT_LAST:
break;
}
}
/*
* _clutter_process_event
* @event: a #ClutterEvent.
*
* Does the actual work of processing an event that was queued earlier
* out of clutter_do_event().
*/
void
_clutter_process_event (ClutterEvent *event)
{
ClutterMainContext *context;
ClutterActor *stage;
context = _clutter_context_get_default ();
stage = CLUTTER_ACTOR (event->any.stage);
if (stage == NULL)
{
CLUTTER_NOTE (EVENT, "Discarding event without a stage set");
return;
}
/* push events on a stack, so that we don't need to
* add an event parameter to all signals that can be emitted within
* an event chain
*/
context->current_event = g_slist_prepend (context->current_event, event);
_clutter_process_event_details (stage, context, event);
context->current_event = g_slist_delete_link (context->current_event, context->current_event);
}
void
clutter_base_init (void)
{
static gboolean initialised = FALSE;
if (!initialised)
{
initialised = TRUE;
#if !GLIB_CHECK_VERSION (2, 35, 1)
/* initialise GLib type system */
g_type_init ();
#endif
clutter_graphene_init ();
}
}
/**
* clutter_get_default_frame_rate:
*
* Retrieves the default frame rate. See clutter_set_default_frame_rate().
*
* Return value: the default frame rate
*
* Since: 0.6
*/
guint
clutter_get_default_frame_rate (void)
{
ClutterMainContext *context;
context = _clutter_context_get_default ();
return context->frame_rate;
}
/**
* clutter_get_font_map:
*
* Retrieves the #PangoFontMap instance used by Clutter.
* You can use the global font map object with the COGL
* Pango API.
*
* Return value: (transfer none): the #PangoFontMap instance. The returned
* value is owned by Clutter and it should never be unreferenced.
*
* Since: 1.0
*/
PangoFontMap *
clutter_get_font_map (void)
{
return PANGO_FONT_MAP (clutter_context_get_pango_fontmap ());
}
typedef struct _ClutterRepaintFunction
{
guint id;
ClutterRepaintFlags flags;
GSourceFunc func;
gpointer data;
GDestroyNotify notify;
} ClutterRepaintFunction;
/**
* clutter_threads_remove_repaint_func:
* @handle_id: an unsigned integer greater than zero
*
* Removes the repaint function with @handle_id as its id
*
* Since: 1.0
*/
void
clutter_threads_remove_repaint_func (guint handle_id)
{
ClutterRepaintFunction *repaint_func;
ClutterMainContext *context;
GList *l;
g_return_if_fail (handle_id > 0);
context = _clutter_context_get_default ();
l = context->repaint_funcs;
while (l != NULL)
{
repaint_func = l->data;
if (repaint_func->id == handle_id)
{
context->repaint_funcs =
g_list_remove_link (context->repaint_funcs, l);
g_list_free (l);
if (repaint_func->notify)
repaint_func->notify (repaint_func->data);
g_slice_free (ClutterRepaintFunction, repaint_func);
break;
}
l = l->next;
}
}
/**
* clutter_threads_add_repaint_func:
* @func: the function to be called within the paint cycle
* @data: data to be passed to the function, or %NULL
* @notify: function to be called when removing the repaint
* function, or %NULL
*
* Adds a function to be called whenever Clutter is processing a new
* frame.
*
* If the function returns %FALSE it is automatically removed from the
* list of repaint functions and will not be called again.
*
* This function is guaranteed to be called from within the same thread
* that called clutter_main(), and while the Clutter lock is being held;
* the function will be called within the main loop, so it is imperative
* that it does not block, otherwise the frame time budget may be lost.
*
* A repaint function is useful to ensure that an update of the scenegraph
* is performed before the scenegraph is repainted. By default, a repaint
* function added using this function will be invoked prior to the frame
* being processed.
*
* Adding a repaint function does not automatically ensure that a new
* frame will be queued.
*
* When the repaint function is removed (either because it returned %FALSE
* or because clutter_threads_remove_repaint_func() has been called) the
* @notify function will be called, if any is set.
*
* See also: clutter_threads_add_repaint_func_full()
*
* Return value: the ID (greater than 0) of the repaint function. You
* can use the returned integer to remove the repaint function by
* calling clutter_threads_remove_repaint_func().
*
* Since: 1.0
*/
guint
clutter_threads_add_repaint_func (GSourceFunc func,
gpointer data,
GDestroyNotify notify)
{
return clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_PRE_PAINT,
func,
data, notify);
}
/**
* clutter_threads_add_repaint_func_full:
* @flags: flags for the repaint function
* @func: the function to be called within the paint cycle
* @data: data to be passed to the function, or %NULL
* @notify: function to be called when removing the repaint
* function, or %NULL
*
* Adds a function to be called whenever Clutter is processing a new
* frame.
*
* If the function returns %FALSE it is automatically removed from the
* list of repaint functions and will not be called again.
*
* This function is guaranteed to be called from within the same thread
* that called clutter_main(), and while the Clutter lock is being held;
* the function will be called within the main loop, so it is imperative
* that it does not block, otherwise the frame time budget may be lost.
*
* A repaint function is useful to ensure that an update of the scenegraph
* is performed before the scenegraph is repainted. The @flags passed to this
* function will determine the section of the frame processing that will
* result in @func being called.
*
* Adding a repaint function does not automatically ensure that a new
* frame will be queued.
*
* When the repaint function is removed (either because it returned %FALSE
* or because clutter_threads_remove_repaint_func() has been called) the
* @notify function will be called, if any is set.
*
* Return value: the ID (greater than 0) of the repaint function. You
* can use the returned integer to remove the repaint function by
* calling clutter_threads_remove_repaint_func().
*
* Since: 1.10
*/
guint
clutter_threads_add_repaint_func_full (ClutterRepaintFlags flags,
GSourceFunc func,
gpointer data,
GDestroyNotify notify)
{
ClutterMainContext *context;
ClutterRepaintFunction *repaint_func;
g_return_val_if_fail (func != NULL, 0);
context = _clutter_context_get_default ();
repaint_func = g_slice_new (ClutterRepaintFunction);
repaint_func->id = context->last_repaint_id++;
repaint_func->flags = flags;
repaint_func->func = func;
repaint_func->data = data;
repaint_func->notify = notify;
context->repaint_funcs = g_list_prepend (context->repaint_funcs,
repaint_func);
return repaint_func->id;
}
/*
* _clutter_run_repaint_functions:
* @flags: only run the repaint functions matching the passed flags
*
* Executes the repaint functions added using the
* clutter_threads_add_repaint_func() function.
*
* Must be called with the Clutter thread lock held.
*/
void
_clutter_run_repaint_functions (ClutterRepaintFlags flags)
{
ClutterMainContext *context = _clutter_context_get_default ();
ClutterRepaintFunction *repaint_func;
GList *invoke_list, *reinvoke_list, *l;
if (context->repaint_funcs == NULL)
return;
/* steal the list */
invoke_list = context->repaint_funcs;
context->repaint_funcs = NULL;
reinvoke_list = NULL;
/* consume the whole list while we execute the functions */
while (invoke_list != NULL)
{
gboolean res = FALSE;
repaint_func = invoke_list->data;
l = invoke_list;
invoke_list = g_list_remove_link (invoke_list, invoke_list);
g_list_free (l);
if ((repaint_func->flags & flags) != 0)
res = repaint_func->func (repaint_func->data);
else
res = TRUE;
if (res)
reinvoke_list = g_list_prepend (reinvoke_list, repaint_func);
else
{
if (repaint_func->notify != NULL)
repaint_func->notify (repaint_func->data);
g_slice_free (ClutterRepaintFunction, repaint_func);
}
}
if (context->repaint_funcs != NULL)
{
context->repaint_funcs = g_list_concat (context->repaint_funcs,
g_list_reverse (reinvoke_list));
}
else
context->repaint_funcs = g_list_reverse (reinvoke_list);
}
/**
* clutter_get_default_text_direction:
*
* Retrieves the default direction for the text. The text direction is
* determined by the locale and/or by the `CLUTTER_TEXT_DIRECTION`
* environment variable.
*
* The default text direction can be overridden on a per-actor basis by using
* clutter_actor_set_text_direction().
*
* Return value: the default text direction
*
* Since: 1.2
*/
ClutterTextDirection
clutter_get_default_text_direction (void)
{
return clutter_text_direction;
}
/*< private >
* clutter_clear_events_queue:
*
* Clears the events queue stored in the main context.
*/
void
_clutter_clear_events_queue (void)
{
ClutterMainContext *context = _clutter_context_get_default ();
ClutterEvent *event;
GAsyncQueue *events_queue;
if (!context->events_queue)
return;
g_async_queue_lock (context->events_queue);
while ((event = g_async_queue_try_pop_unlocked (context->events_queue)))
clutter_event_free (event);
events_queue = context->events_queue;
context->events_queue = NULL;
g_async_queue_unlock (events_queue);
g_async_queue_unref (events_queue);
}
/**
* clutter_add_debug_flags: (skip)
*
* Adds the debug flags passed to the list of debug flags.
*/
void
clutter_add_debug_flags (ClutterDebugFlag debug_flags,
ClutterDrawDebugFlag draw_flags,
ClutterPickDebugFlag pick_flags)
{
clutter_debug_flags |= debug_flags;
clutter_paint_debug_flags |= draw_flags;
clutter_pick_debug_flags |= pick_flags;
}
/**
* clutter_remove_debug_flags: (skip)
*
* Removes the debug flags passed from the list of debug flags.
*/
void
clutter_remove_debug_flags (ClutterDebugFlag debug_flags,
ClutterDrawDebugFlag draw_flags,
ClutterPickDebugFlag pick_flags)
{
clutter_debug_flags &= ~debug_flags;
clutter_paint_debug_flags &= ~draw_flags;
clutter_pick_debug_flags &= ~pick_flags;
}
void
_clutter_set_sync_to_vblank (gboolean sync_to_vblank)
{
clutter_sync_to_vblank = !!sync_to_vblank;
}
void
_clutter_debug_messagev (const char *format,
va_list var_args)
{
static gint64 last_debug_stamp;
gchar *stamp, *fmt;
gint64 cur_time, debug_stamp;
cur_time = g_get_monotonic_time ();
/* if the last debug message happened less than a second ago, just
* show the increments instead of the full timestamp
*/
if (last_debug_stamp == 0 ||
cur_time - last_debug_stamp >= G_USEC_PER_SEC)
{
debug_stamp = cur_time;
last_debug_stamp = debug_stamp;
stamp = g_strdup_printf ("[%16" G_GINT64_FORMAT "]", debug_stamp);
}
else
{
debug_stamp = cur_time - last_debug_stamp;
stamp = g_strdup_printf ("[%+16" G_GINT64_FORMAT "]", debug_stamp);
}
fmt = g_strconcat (stamp, ":", format, NULL);
g_free (stamp);
g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, fmt, var_args);
g_free (fmt);
}
void
_clutter_debug_message (const char *format, ...)
{
va_list args;
va_start (args, format);
_clutter_debug_messagev (format, args);
va_end (args);
}
gboolean
_clutter_diagnostic_enabled (void)
{
static const char *clutter_enable_diagnostic = NULL;
if (G_UNLIKELY (clutter_enable_diagnostic == NULL))
{
clutter_enable_diagnostic = g_getenv ("CLUTTER_ENABLE_DIAGNOSTIC");
if (clutter_enable_diagnostic == NULL)
clutter_enable_diagnostic = "0";
}
return *clutter_enable_diagnostic != '0';
}
void
_clutter_diagnostic_message (const char *format, ...)
{
va_list args;
char *fmt;
fmt = g_strconcat ("[DIAGNOSTIC]: ", format, NULL);
va_start (args, format);
g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, fmt, args);
va_end (args);
g_free (fmt);
}
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