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mutter/clutter/clutter/clutter-main.c
Jonas Ådahl 796eb005bc clutter/main: Add 'detailed-trace' debug flag 
Will be used to trace a lot more, and with more details, and thus may
have a larger impact on what is actually measured. This potential impact
is the reason for enabling only when needed.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1700>
2021-07-29 15:37:12 +02:00

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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-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;
/* A constant added to heuristic max render time to account for variations
* in the estimates.
*/
int clutter_max_render_time_constant_us = 2000;
#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 },
{ "frame-timings", CLUTTER_DEBUG_FRAME_TIMINGS },
{ "detailed-trace", CLUTTER_DEBUG_DETAILED_TRACE },
};
#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 },
{ "disable-dynamic-max-render-time", CLUTTER_DEBUG_DISABLE_DYNAMIC_MAX_RENDER_TIME },
{ "max-render-time", CLUTTER_DEBUG_PAINT_MAX_RENDER_TIME },
};
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_free (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_new0 (ClutterThreadsDispatch, 1);
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_new0 (ClutterThreadsDispatch, 1);
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;
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 ();
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.
*/
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 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:
{
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;
}
/* We need to repick on both motion and button press events, the
* latter is only needed for X11 (there the device actor might be
* stale because we don't always receive motion events).
*/
if (event->type == CLUTTER_BUTTON_PRESS ||
event->type == CLUTTER_MOTION)
{
event->any.source =
update_device_for_event (CLUTTER_STAGE (stage), event, TRUE);
}
else
{
event->any.source =
clutter_stage_get_device_actor (CLUTTER_STAGE (stage),
device,
NULL);
}
if (event->any.source == NULL)
break;
}
CLUTTER_NOTE (EVENT,
"Reactive event received at %.2f, %.2f - actor: %p",
x, y,
event->any.source);
/* 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:
{
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;
}
if (event->type == CLUTTER_TOUCH_BEGIN ||
event->type == CLUTTER_TOUCH_UPDATE)
{
event->any.source =
update_device_for_event (CLUTTER_STAGE (stage), event, TRUE);
}
else
{
event->any.source =
clutter_stage_get_device_actor (CLUTTER_STAGE (stage),
device,
event->touch.sequence);
}
if (event->any.source == NULL)
break;
}
CLUTTER_NOTE (EVENT,
"Reactive event received at %.2f, %.2f - actor: %p",
x, y,
event->any.source);
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;
ClutterSeat *seat;
context = _clutter_context_get_default ();
seat = clutter_backend_get_default_seat (context->backend);
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_seat_handle_event_post (seat, 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_free (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_new0 (ClutterRepaintFunction, 1);
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_free (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_debug_set_max_render_time_constant (int max_render_time_constant_us)
{
clutter_max_render_time_constant_us = max_render_time_constant_us;
}
void
clutter_get_debug_flags (ClutterDebugFlag *debug_flags,
ClutterDrawDebugFlag *draw_flags,
ClutterPickDebugFlag *pick_flags)
{
if (debug_flags)
*debug_flags = clutter_debug_flags;
if (draw_flags)
*draw_flags = clutter_paint_debug_flags;
if (pick_flags)
*pick_flags = clutter_pick_debug_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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