/* * Clutter. * * An OpenGL based 'interactive canvas' library. * * Authored By Matthew Allum * * 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 . */ /** * 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 #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-master-clock.h" #include "clutter-mutter.h" #include "clutter-paint-node-private.h" #include "clutter-private.h" #include "clutter-settings-private.h" #include "clutter-stage-manager.h" #include "clutter-stage-private.h" #ifdef CLUTTER_WINDOWING_X11 #include "x11/clutter-backend-x11.h" #endif #ifdef CLUTTER_WINDOWING_EGL #include "egl/clutter-backend-eglnative.h" #endif #include #include #include "cally/cally.h" /* For accessibility support */ /* main context */ static ClutterMainContext *ClutterCntx = NULL; G_LOCK_DEFINE_STATIC (ClutterCntx); /* main lock and locking/unlocking functions */ static GMutex clutter_threads_mutex; /* 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_use_fuzzy_picking = 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; static guint clutter_main_loop_level = 0; static GSList *main_loops = NULL; /* 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 }, }; static inline void clutter_threads_init_default (void) { g_mutex_init (&clutter_threads_mutex); } #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, "UseFuzzyPicking", &key_error); if (key_error != NULL) g_clear_error (&key_error); else clutter_use_fuzzy_picking = 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; } /** * clutter_main_quit: * * Terminates the Clutter mainloop. */ void clutter_main_quit (void) { if (main_loops == NULL) { g_critical ("Calling clutter_main_quit() without calling clutter_main() " "is not allowed. If you are using another main loop, use the " "appropriate API to terminate it."); return; } CLUTTER_NOTE (MISC, "Terminating main loop level %d", clutter_main_loop_level); g_main_loop_quit (main_loops->data); } /** * clutter_main_level: * * Retrieves the depth of the Clutter mainloop. * * Return value: The level of the mainloop. */ gint clutter_main_level (void) { return clutter_main_loop_level; } /** * clutter_main: * * Starts the Clutter mainloop. */ void clutter_main (void) { GMainLoop *loop; if (!_clutter_context_is_initialized ()) { g_warning ("Called clutter_main() but Clutter wasn't initialised. " "You must call clutter_init() first."); return; } clutter_main_loop_level++; CLUTTER_NOTE (MISC, "Entering main loop level %d", clutter_main_loop_level); loop = g_main_loop_new (NULL, TRUE); main_loops = g_slist_prepend (main_loops, loop); if (g_main_loop_is_running (main_loops->data)) { _clutter_threads_release_lock (); g_main_loop_run (loop); _clutter_threads_acquire_lock (); } main_loops = g_slist_remove (main_loops, loop); g_main_loop_unref (loop); CLUTTER_NOTE (MISC, "Leaving main loop level %d", clutter_main_loop_level); clutter_main_loop_level--; } gboolean _clutter_threads_dispatch (gpointer data) { ClutterThreadsDispatch *dispatch = data; gboolean ret = FALSE; _clutter_threads_acquire_lock (); if (!g_source_is_destroyed (g_main_current_source ())) ret = dispatch->func (dispatch->data); _clutter_threads_release_lock (); 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); } void _clutter_threads_acquire_lock (void) { g_mutex_lock (&clutter_threads_mutex); } void _clutter_threads_release_lock (void) { /* we need to trylock here, in case the lock hasn't been acquired; on * various systems trying to release a mutex that hasn't been acquired * will cause a run-time error. trylock() will either fail, in which * case we can release the lock we own; or it will succeeds, in which * case we need to release the lock we just acquired. so we ignore the * returned value. * * see: https://bugs.gnome.org/679439 */ g_mutex_trylock (&clutter_threads_mutex); g_mutex_unlock (&clutter_threads_mutex); } void _clutter_context_lock (void) { G_LOCK (ClutterCntx); } void _clutter_context_unlock (void) { G_UNLOCK (ClutterCntx); } gboolean _clutter_context_is_initialized (void) { if (ClutterCntx == NULL) return FALSE; return ClutterCntx->is_initialized; } static ClutterMainContext * clutter_context_get_default_unlocked (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->last_repaint_id = 1; } return ClutterCntx; } ClutterMainContext * _clutter_context_get_default (void) { ClutterMainContext *retval; _clutter_context_lock (); retval = clutter_context_get_default_unlocked (); _clutter_context_unlock (); return retval; } 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 }, { "clutter-use-fuzzy-picking", 0, 0, G_OPTION_ARG_NONE, &clutter_use_fuzzy_picking, N_("Use 'fuzzy' picking"), 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; env_string = g_getenv ("CLUTTER_FUZZY_PICK"); if (env_string) clutter_use_fuzzy_picking = 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 output, after * programname [OPTION...] * @entries: (array) (allow-none): a %NULL terminated array of * #GOptionEntrys describing the options of your program * @translation_domain: (allow-none): a translation domain to use for * translating the 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 * 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:%d, time:%u)", click_count, clutter_input_device_get_device_id (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:%d, time:%u)", click_count, clutter_input_device_get_device_id (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) { static gboolean lock = FALSE; if (event->any.source == NULL) { CLUTTER_NOTE (EVENT, "No source set, discarding event"); return; } /* reentrancy check */ if (lock != FALSE) { g_warning ("Tried emitting event during event delivery, bailing out."); return; } lock = TRUE; _clutter_actor_handle_event (event->any.source, event); lock = FALSE; } /* * 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 emit_keyboard_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 inline void process_key_event (ClutterEvent *event, ClutterInputDevice *device) { ClutterInputDeviceClass *device_class = CLUTTER_INPUT_DEVICE_GET_CLASS (device); if (device_class->process_kbd_a11y_event) { device_class->process_kbd_a11y_event (event, device, emit_keyboard_event); return; } emit_keyboard_event (event, device); } 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 _clutter_process_event_details (ClutterActor *stage, ClutterMainContext *context, ClutterEvent *event) { ClutterInputDevice *device = clutter_event_get_device (event); 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: { 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 = clutter_input_device_update (device, NULL, 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 && device->cursor_actor != stage) { ClutterEvent *crossing; crossing = clutter_event_copy (event); crossing->crossing.related = stage; crossing->crossing.source = device->cursor_actor; emit_crossing_event (crossing, device); clutter_event_free (crossing); } emit_crossing_event (event, device); break; case CLUTTER_DESTROY_NOTIFY: case CLUTTER_DELETE: event->any.source = stage; if (_clutter_event_process_filters (event)) break; /* the stage did not handle the event, so we just quit */ clutter_stage_event (CLUTTER_STAGE (stage), event); break; case CLUTTER_MOTION: #ifdef CLUTTER_WINDOWING_X11 if (!clutter_check_windowing_backend (CLUTTER_WINDOWING_X11) && !(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); } } #endif /* CLUTTER_WINDOWING_X11 */ /* 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: #ifdef CLUTTER_WINDOWING_X11 if (!clutter_check_windowing_backend (CLUTTER_WINDOWING_X11)) { 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); } } #endif /* CLUTTER_WINDOWING_X11 */ 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; } /* if the backend provides a device then we should * already have everything we need to update it and * get the actor underneath */ if (device != NULL) actor = clutter_input_device_update (device, NULL, TRUE); else { CLUTTER_NOTE (EVENT, "No device found: picking"); actor = _clutter_stage_do_pick (CLUTTER_STAGE (stage), x, y, CLUTTER_PICK_REACTIVE); } 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; ClutterEventSequence *sequence; gfloat x, y; sequence = clutter_event_get_event_sequence (event); if (event->type == CLUTTER_TOUCH_BEGIN) _clutter_input_device_add_event_sequence (device, event); 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) _clutter_input_device_remove_event_sequence (device, event); break; } if (device != NULL) actor = clutter_input_device_update (device, sequence, TRUE); else { CLUTTER_NOTE (EVENT, "No device found: picking"); actor = _clutter_stage_do_pick (CLUTTER_STAGE (stage), x, y, CLUTTER_PICK_REACTIVE); } 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) _clutter_input_device_remove_event_sequence (device, event); break; } case CLUTTER_PROXIMITY_IN: case CLUTTER_PROXIMITY_OUT: clutter_input_device_update_from_tool (clutter_event_get_source_device (event), clutter_event_get_device_tool (event)); 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_STAGE_STATE: /* focus - forward to stage */ event->any.source = stage; if (!_clutter_event_process_filters (event)) clutter_stage_event (CLUTTER_STAGE (stage), event); break; case CLUTTER_CLIENT_MESSAGE: 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); } /** * clutter_get_actor_by_gid: * @id_: a #ClutterActor unique id. * * Retrieves the #ClutterActor with @id_. * * Return value: (transfer none): the actor with the passed id or %NULL. * The returned actor does not have its reference count increased. * * Since: 0.6 * * Deprecated: 1.8: The id is deprecated, and this function always returns * %NULL. Use the proper scene graph API in #ClutterActor to find a child * of the stage. */ ClutterActor * clutter_get_actor_by_gid (guint32 id_) { return NULL; } 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 /* initialise the Big Clutter Lock™ if necessary */ clutter_threads_init_default (); 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); _clutter_context_lock (); context = clutter_context_get_default_unlocked (); 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_context_unlock (); } /** * 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); _clutter_context_lock (); context = clutter_context_get_default_unlocked (); repaint_func = g_slice_new (ClutterRepaintFunction); repaint_func->id = context->last_repaint_id++; /* mask out QUEUE_REDRAW_ON_ADD, since we're going to consume it */ repaint_func->flags = flags & ~CLUTTER_REPAINT_FLAGS_QUEUE_REDRAW_ON_ADD; repaint_func->func = func; repaint_func->data = data; repaint_func->notify = notify; context->repaint_funcs = g_list_prepend (context->repaint_funcs, repaint_func); _clutter_context_unlock (); if ((flags & CLUTTER_REPAINT_FLAGS_QUEUE_REDRAW_ON_ADD) != 0) { ClutterMasterClock *master_clock = _clutter_master_clock_get_default (); _clutter_master_clock_ensure_next_iteration (master_clock); } 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 (); if (context->events_queue != NULL) { g_queue_foreach (context->events_queue, (GFunc) clutter_event_free, NULL); g_queue_free (context->events_queue); context->events_queue = NULL; } } void _clutter_clear_events_queue_for_stage (ClutterStage *stage) { ClutterMainContext *context = _clutter_context_get_default (); GList *l, *next; if (context->events_queue == NULL) return; /* Remove any pending events for this stage from the event queue */ for (l = context->events_queue->head; l; l = next) { ClutterEvent *event = l->data; next = l->next; if (event->any.stage == stage) { g_queue_delete_link (context->events_queue, l); clutter_event_free (event); } } } ClutterPickMode _clutter_context_get_pick_mode (void) { ClutterMainContext *context = _clutter_context_get_default (); return context->pick_mode; } /** * clutter_check_windowing_backend: * @backend_type: the name of the backend to check * * Checks the run-time name of the Clutter windowing system backend, using * the symbolic macros like %CLUTTER_WINDOWING_X11. * * This function should be used in conjuction with the compile-time macros * inside applications and libraries that are using the platform-specific * windowing system API, to ensure that they are running on the correct * windowing system; for instance: * * |[ * #ifdef CLUTTER_WINDOWING_X11 * if (clutter_check_windowing_backend (CLUTTER_WINDOWING_X11)) * { * // it is safe to use the clutter_x11_* API * } * else * #endif * g_error ("Unknown Clutter backend."); * ]| * * Return value: %TRUE if the current Clutter windowing system backend is * the one checked, and %FALSE otherwise * * Since: 1.10 */ gboolean clutter_check_windowing_backend (const char *backend_type) { ClutterMainContext *context = _clutter_context_get_default (); g_return_val_if_fail (backend_type != NULL, FALSE); backend_type = g_intern_string (backend_type); #ifdef CLUTTER_WINDOWING_EGL if (backend_type == I_(CLUTTER_WINDOWING_EGL) && CLUTTER_IS_BACKEND_EGL_NATIVE (context->backend)) return TRUE; else #endif #ifdef CLUTTER_WINDOWING_X11 if (backend_type == I_(CLUTTER_WINDOWING_X11) && CLUTTER_IS_BACKEND_X11 (context->backend)) return TRUE; else #endif return FALSE; } /** * 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); }