/* * 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 * * * 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(). * * Thread Initialization * The code below shows how to correctly initialize Clutter * in a multi-threaded environment. These operations are mandatory for * applications that wish to use threads with Clutter. * * int * main (int argc, char *argv[]) * { * /* initialize Clutter */ * clutter_init (&argc, &argv); * * /* program code */ * * /* acquire the main lock */ * clutter_threads_enter (); * * /* start the main loop */ * clutter_main (); * * /* release the main lock */ * clutter_threads_leave (); * * /* clean up */ * return 0; * } * * * This threading model has the caveat that it is only safe to call * Clutter's API when the lock has been acquired — which happens * between pairs of clutter_threads_enter() and clutter_threads_leave() * calls. * The only safe and portable way to use the Clutter API in a * multi-threaded environment is to never access the API from a thread that * did not call 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 finished. * Clutter provides thread-aware variants of g_idle_add() and * g_timeout_add() that acquire the Clutter lock before invoking the provided * callback: clutter_threads_add_idle() and * clutter_threads_add_timeout(). * The example below shows how to use a worker thread to perform a * blocking operation, and perform UI updates using the main loop. * * A worker thread example * * * FIXME: MISSING XINCLUDE CONTENT * * * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "clutter-actor-private.h" #include "clutter-backend-private.h" #include "clutter-config.h" #include "clutter-debug.h" #include "clutter-device-manager-private.h" #include "clutter-event-private.h" #include "clutter-feature.h" #include "clutter-main.h" #include "clutter-master-clock.h" #include "clutter-private.h" #include "clutter-profile.h" #include "clutter-settings-private.h" #include "clutter-stage-manager.h" #include "clutter-stage-private.h" #include "clutter-version.h" /* For flavour define */ #ifdef CLUTTER_WINDOWING_OSX #include "osx/clutter-backend-osx.h" #endif #ifdef CLUTTER_WINDOWING_WIN32 #include "win32/clutter-backend-win32.h" #endif #ifdef CLUTTER_WINDOWING_GDK #include "gdk/clutter-backend-gdk.h" #endif #ifdef CLUTTER_WINDOWING_X11 #include "x11/clutter-backend-x11.h" #endif #ifdef CLUTTER_WINDOWING_EGL #include "egl/clutter-backend-eglnative.h" #endif #ifdef CLUTTER_WINDOWING_WAYLAND #include "wayland/clutter-backend-wayland.h" #endif #include #include #include "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; static GCallback clutter_threads_lock = NULL; static GCallback clutter_threads_unlock = 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_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; /* profile flags */ guint clutter_profile_flags = 0; const guint clutter_major_version = CLUTTER_MAJOR_VERSION; const guint clutter_minor_version = CLUTTER_MINOR_VERSION; const guint clutter_micro_version = CLUTTER_MICRO_VERSION; #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 }, { "dump-pick-buffers", CLUTTER_DEBUG_DUMP_PICK_BUFFERS }, }; 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 }, }; #ifdef CLUTTER_ENABLE_PROFILE static const GDebugKey clutter_profile_keys[] = { {"picking-only", CLUTTER_PROFILE_PICKING_ONLY }, {"disable-report", CLUTTER_PROFILE_DISABLE_REPORT } }; #endif /* CLUTTER_ENABLE_DEBUG */ static void clutter_threads_impl_lock (void) { g_mutex_lock (&clutter_threads_mutex); } static void clutter_threads_impl_unlock (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); } static inline void clutter_threads_init_default (void) { g_mutex_init (&clutter_threads_mutex); #ifndef CLUTTER_WINDOWING_WIN32 /* we don't need nor want locking functions on Windows.here * as Windows GUI system assumes multithreadedness * see bug: https://bugzilla.gnome.org/show_bug.cgi?id=662071 */ if (clutter_threads_lock == NULL) clutter_threads_lock = clutter_threads_impl_lock; if (clutter_threads_unlock == NULL) clutter_threads_unlock = clutter_threads_impl_unlock; #endif /* CLUTTER_WINDOWING_WIN32 */ } #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; 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; bool_value = g_key_file_get_boolean (keyfile, ENVIRONMENT_GROUP, "SyncToVblank", &key_error); if (key_error != NULL) g_clear_error (&key_error); else clutter_sync_to_vblank = 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); } /** * clutter_get_show_fps: * * Returns whether Clutter should print out the frames per second on the * console. You can enable this setting either using the * CLUTTER_SHOW_FPS environment variable or passing * the --clutter-show-fps command line argument. * * * Return value: %TRUE if Clutter should show the FPS. * * Since: 0.4 * * Deprecated: 1.10: This function does not do anything. Use the environment * variable or the configuration file to determine whether Clutter should * print out the FPS counter on the console. */ gboolean clutter_get_show_fps (void) { return FALSE; } 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; } /** * clutter_redraw: * * Forces a redraw of the entire stage. Applications should never use this * function, but queue a redraw using clutter_actor_queue_redraw(). * * This function should only be used by libraries integrating Clutter from * within another toolkit. * * Deprecated: 1.10: Use clutter_stage_ensure_redraw() instead. */ void clutter_redraw (ClutterStage *stage) { g_return_if_fail (CLUTTER_IS_STAGE (stage)); clutter_stage_ensure_redraw (stage); } /** * clutter_set_motion_events_enabled: * @enable: %TRUE to enable per-actor motion events * * Sets whether per-actor motion events should be enabled or not on * all #ClutterStages managed by Clutter. * * If @enable is %FALSE the following events will not work: * * ClutterActor::motion-event, unless on the * #ClutterStage * ClutterActor::enter-event * ClutterActor::leave-event * * * Since: 0.6 * * Deprecated: 1.8: Use clutter_stage_set_motion_events_enabled() instead. */ void clutter_set_motion_events_enabled (gboolean enable) { ClutterStageManager *stage_manager; ClutterMainContext *context; const GSList *l; enable = !!enable; context = _clutter_context_get_default (); if (context->motion_events_per_actor == enable) return; /* store the flag for later query and for newly created stages */ context->motion_events_per_actor = enable; /* propagate the change to all stages */ stage_manager = clutter_stage_manager_get_default (); for (l = clutter_stage_manager_peek_stages (stage_manager); l != NULL; l = l->next) { clutter_stage_set_motion_events_enabled (l->data, enable); } } /** * clutter_get_motion_events_enabled: * * Gets whether the per-actor motion events are enabled. * * Return value: %TRUE if the motion events are enabled * * Since: 0.6 * * Deprecated: 1.8: Use clutter_stage_get_motion_events_enabled() instead. */ gboolean clutter_get_motion_events_enabled (void) { return _clutter_context_get_motion_events_enabled (); } ClutterActor * _clutter_get_actor_by_id (ClutterStage *stage, guint32 actor_id) { if (stage == NULL) { ClutterMainContext *context = _clutter_context_get_default (); return _clutter_id_pool_lookup (context->id_pool, actor_id); } return _clutter_stage_get_actor_by_pick_id (stage, actor_id); } void _clutter_id_to_color (guint id_, ClutterColor *col) { ClutterMainContext *ctx; gint red, green, blue; ctx = _clutter_context_get_default (); if (ctx->fb_g_mask == 0) { /* Figure out framebuffer masks used for pick */ cogl_get_bitmasks (&ctx->fb_r_mask, &ctx->fb_g_mask, &ctx->fb_b_mask, NULL); ctx->fb_r_mask_used = ctx->fb_r_mask; ctx->fb_g_mask_used = ctx->fb_g_mask; ctx->fb_b_mask_used = ctx->fb_b_mask; /* XXX - describe what "fuzzy picking" is */ if (clutter_use_fuzzy_picking) { ctx->fb_r_mask_used--; ctx->fb_g_mask_used--; ctx->fb_b_mask_used--; } } /* compute the numbers we'll store in the components */ red = (id_ >> (ctx->fb_g_mask_used+ctx->fb_b_mask_used)) & (0xff >> (8-ctx->fb_r_mask_used)); green = (id_ >> ctx->fb_b_mask_used) & (0xff >> (8-ctx->fb_g_mask_used)); blue = (id_) & (0xff >> (8-ctx->fb_b_mask_used)); /* shift left bits a bit and add one, this circumvents * at least some potential rounding errors in GL/GLES * driver / hw implementation. */ if (ctx->fb_r_mask_used != ctx->fb_r_mask) red = red * 2; if (ctx->fb_g_mask_used != ctx->fb_g_mask) green = green * 2; if (ctx->fb_b_mask_used != ctx->fb_b_mask) blue = blue * 2; /* shift up to be full 8bit values */ red = (red << (8 - ctx->fb_r_mask)) | (0x7f >> (ctx->fb_r_mask_used)); green = (green << (8 - ctx->fb_g_mask)) | (0x7f >> (ctx->fb_g_mask_used)); blue = (blue << (8 - ctx->fb_b_mask)) | (0x7f >> (ctx->fb_b_mask_used)); col->red = red; col->green = green; col->blue = blue; col->alpha = 0xff; /* XXX: We rotate the nibbles of the colors here so that there is a * visible variation between colors of sequential actor identifiers; * otherwise pick buffers dumped to an image will pretty much just look * black. */ if (G_UNLIKELY (clutter_pick_debug_flags & CLUTTER_DEBUG_DUMP_PICK_BUFFERS)) { col->red = (col->red << 4) | (col->red >> 4); col->green = (col->green << 4) | (col->green >> 4); col->blue = (col->blue << 4) | (col->blue >> 4); } } guint _clutter_pixel_to_id (guchar pixel[4]) { ClutterMainContext *ctx; gint red, green, blue; guint retval; ctx = _clutter_context_get_default (); /* reduce the pixel components to the number of bits actually used of the * 8bits. */ if (G_UNLIKELY (clutter_pick_debug_flags & CLUTTER_DEBUG_DUMP_PICK_BUFFERS)) { guchar tmp; /* XXX: In _clutter_id_to_color we rotated the nibbles of the colors so * that there is a visible variation between colors of sequential actor * identifiers (otherwise pick buffers dumped to an image will pretty * much just look black.) Here we reverse that rotation. */ tmp = ((pixel[0] << 4) | (pixel[0] >> 4)); red = tmp >> (8 - ctx->fb_r_mask); tmp = ((pixel[1] << 4) | (pixel[1] >> 4)); green = tmp >> (8 - ctx->fb_g_mask); tmp = ((pixel[2] << 4) | (pixel[2] >> 4)); blue = tmp >> (8 - ctx->fb_b_mask); } else { red = pixel[0] >> (8 - ctx->fb_r_mask); green = pixel[1] >> (8 - ctx->fb_g_mask); blue = pixel[2] >> (8 - ctx->fb_b_mask); } /* divide potentially by two if 'fuzzy' */ red = red >> (ctx->fb_r_mask - ctx->fb_r_mask_used); green = green >> (ctx->fb_g_mask - ctx->fb_g_mask_used); blue = blue >> (ctx->fb_b_mask - ctx->fb_b_mask_used); /* combine the correct per component values into the final id */ retval = blue + (green << ctx->fb_b_mask_used) + (red << (ctx->fb_b_mask_used + ctx->fb_g_mask_used)); return retval; } 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 { /* Translators: Leave this UNTRANSLATED if your language is * left-to-right. If your language is right-to-left * (e.g. Hebrew, Arabic), translate it to "default:RTL". * * Do NOT translate it to non-English e.g. "predefinito:LTR"! If * it isn't default:LTR or default:RTL it will not work. */ char *e = _("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; } static void update_pango_context (ClutterBackend *backend, PangoContext *context) { ClutterSettings *settings; PangoFontDescription *font_desc; const cairo_font_options_t *font_options; gchar *font_name; PangoDirection pango_dir; gdouble resolution; settings = clutter_settings_get_default (); /* update the text direction */ if (clutter_text_direction == CLUTTER_TEXT_DIRECTION_RTL) pango_dir = PANGO_DIRECTION_RTL; else pango_dir = PANGO_DIRECTION_LTR; pango_context_set_base_dir (context, pango_dir); g_object_get (settings, "font-name", &font_name, NULL); /* get the configuration for the PangoContext from the backend */ font_options = clutter_backend_get_font_options (backend); resolution = clutter_backend_get_resolution (backend); font_desc = pango_font_description_from_string (font_name); if (resolution < 0) resolution = 96.0; /* fall back */ pango_context_set_font_description (context, font_desc); pango_cairo_context_set_font_options (context, font_options); pango_cairo_context_set_resolution (context, resolution); pango_font_description_free (font_desc); g_free (font_name); } PangoContext * _clutter_context_get_pango_context (void) { ClutterMainContext *self = _clutter_context_get_default (); if (G_UNLIKELY (self->pango_context == NULL)) { PangoContext *context; context = _clutter_context_create_pango_context (); self->pango_context = context; g_signal_connect (self->backend, "resolution-changed", G_CALLBACK (update_pango_context), self->pango_context); g_signal_connect (self->backend, "font-changed", G_CALLBACK (update_pango_context), self->pango_context); } else update_pango_context (self->backend, self->pango_context); return self->pango_context; } PangoContext * _clutter_context_create_pango_context (void) { CoglPangoFontMap *font_map; PangoContext *context; font_map = clutter_context_get_pango_fontmap (); context = cogl_pango_font_map_create_context (font_map); update_pango_context (clutter_get_default_backend (), context); pango_context_set_language (context, pango_language_get_default ()); return context; } /** * clutter_main_quit: * * Terminates the Clutter mainloop. */ void clutter_main_quit (void) { g_return_if_fail (main_loops != NULL); 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; } #ifdef CLUTTER_ENABLE_PROFILE static gint (*prev_poll) (GPollFD *ufds, guint nfsd, gint timeout_) = NULL; static gint timed_poll (GPollFD *ufds, guint nfsd, gint timeout_) { gint ret; CLUTTER_STATIC_TIMER (poll_timer, "Mainloop", /* parent */ "Mainloop Idle", "The time spent idle in poll()", 0 /* no application private data */); CLUTTER_TIMER_START (uprof_get_mainloop_context (), poll_timer); ret = prev_poll (ufds, nfsd, timeout_); CLUTTER_TIMER_STOP (uprof_get_mainloop_context (), poll_timer); return ret; } #endif /** * clutter_main: * * Starts the Clutter mainloop. */ void clutter_main (void) { GMainLoop *loop; CLUTTER_STATIC_TIMER (mainloop_timer, NULL, /* no parent */ "Mainloop", "The time spent in the clutter mainloop", 0 /* no application private data */); if (clutter_main_loop_level == 0) CLUTTER_TIMER_START (uprof_get_mainloop_context (), mainloop_timer); 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++; #ifdef CLUTTER_ENABLE_PROFILE if (!prev_poll) { prev_poll = g_main_context_get_poll_func (NULL); g_main_context_set_poll_func (NULL, timed_poll); } #endif 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_main_loop_level--; if (clutter_main_loop_level == 0) CLUTTER_TIMER_STOP (uprof_get_mainloop_context (), mainloop_timer); } /** * clutter_threads_init: * * Initialises the Clutter threading mechanism, so that Clutter API can be * called by multiple threads, using clutter_threads_enter() and * clutter_threads_leave() to mark the critical sections. * * You must call g_thread_init() before this function. * * This function must be called before clutter_init(). * * It is safe to call this function multiple times. * * Since: 0.4 * * Deprecated: 1.10: This function does not do anything. Threading support * is initialized when Clutter is initialized. */ void clutter_threads_init (void) { } /** * clutter_threads_set_lock_functions: (skip) * @enter_fn: function called when aquiring the Clutter main lock * @leave_fn: function called when releasing the Clutter main lock * * Allows the application to replace the standard method that * Clutter uses to protect its data structures. Normally, Clutter * creates a single #GMutex that is locked by clutter_threads_enter(), * and released by clutter_threads_leave(); using this function an * application provides, instead, a function @enter_fn that is * called by clutter_threads_enter() and a function @leave_fn that is * called by clutter_threads_leave(). * * The functions must provide at least same locking functionality * as the default implementation, but can also do extra application * specific processing. * * As an example, consider an application that has its own recursive * lock that when held, holds the Clutter lock as well. When Clutter * unlocks the Clutter lock when entering a recursive main loop, the * application must temporarily release its lock as well. * * Most threaded Clutter apps won't need to use this method. * * This method must be called before clutter_init(), and cannot * be called multiple times. * * Since: 0.4 */ void clutter_threads_set_lock_functions (GCallback enter_fn, GCallback leave_fn) { g_return_if_fail (clutter_threads_lock == NULL && clutter_threads_unlock == NULL); clutter_threads_lock = enter_fn; clutter_threads_unlock = leave_fn; } 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: * @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; * * /* mark the critical section */ * * clutter_threads_enter(); * * /* 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); * * clutter_threads_leave(); * * 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); * ]| * * Rename to: clutter_threads_add_idle * * 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: * @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(). * * Rename to: clutter_threads_add_timeout * * 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) { if (clutter_threads_lock != NULL) (* clutter_threads_lock) (); } void _clutter_threads_release_lock (void) { if (clutter_threads_unlock != NULL) (* clutter_threads_unlock) (); } /** * clutter_threads_enter: * * Locks the Clutter thread lock. * * Since: 0.4 * * Deprecated: 1.12: This function should not be used by application * code; marking critical sections is not portable on various * platforms. Instead of acquiring the Clutter lock, schedule UI * updates from the main loop using clutter_threads_add_idle() or * clutter_threads_add_timeout(). */ void clutter_threads_enter (void) { _clutter_threads_acquire_lock (); } /** * clutter_threads_leave: * * Unlocks the Clutter thread lock. * * Since: 0.4 * * Deprecated: 1.12: This function should not be used by application * code; marking critical sections is not portable on various * platforms. Instead of acquiring the Clutter lock, schedule UI * updates from the main loop using clutter_threads_add_idle() or * clutter_threads_add_timeout(). */ void clutter_threads_leave (void) { _clutter_threads_release_lock (); } /** * clutter_get_debug_enabled: * * Check if Clutter has debugging enabled. * * Return value: %FALSE * * Deprecated: 1.10: This function does not do anything. */ gboolean clutter_get_debug_enabled (void) { return FALSE; } 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; 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->motion_events_per_actor = TRUE; 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; } /** * clutter_get_timestamp: * * Returns the approximate number of microseconds passed since Clutter was * intialised. * * This function shdould not be used by application code. * * The output of this function depends on whether Clutter was configured to * enable its debugging code paths, so it's less useful than intended. * * Since Clutter 1.10, this function is an alias to g_get_monotonic_time() * if Clutter was configured to enable the debugging code paths. * * Return value: Number of microseconds since clutter_init() was called, or * zero if Clutter was not configured with debugging code paths. * * Deprecated: 1.10: Use #GTimer or g_get_monotonic_time() for a proper * timing source */ gulong clutter_get_timestamp (void) { #ifdef CLUTTER_ENABLE_DEBUG return (gulong) g_get_monotonic_time (); #else return 0L; #endif } 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 */ #ifdef CLUTTER_ENABLE_PROFILE static gboolean clutter_arg_profile_cb (const char *key, const char *value, gpointer user_data) { clutter_profile_flags |= g_parse_debug_string (value, clutter_profile_keys, G_N_ELEMENTS (clutter_profile_keys)); return TRUE; } static gboolean clutter_arg_no_profile_cb (const char *key, const char *value, gpointer user_data) { clutter_profile_flags &= ~g_parse_debug_string (value, clutter_profile_keys, G_N_ELEMENTS (clutter_profile_keys)); return TRUE; } #endif /* CLUTTER_ENABLE_PROFILE */ 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; } /* 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; #ifdef CLUTTER_ENABLE_PROFILE /* We need to be absolutely sure that uprof has been initialized * before calling _clutter_uprof_init. uprof_init (NULL, NULL) * will be a NOP if it has been initialized but it will also * mean subsequent parsing of the UProf GOptionGroup will have no * affect. * * Sadly GOptionGroup based library initialization is extremly * fragile by design because GOptionGroups have no notion of * dependencies and our post_parse_hook may be called before * the cogl or uprof groups get parsed. */ uprof_init (NULL, NULL); _clutter_uprof_init (); if (clutter_profile_flags & CLUTTER_PROFILE_PICKING_ONLY) _clutter_profile_suspend (); #endif 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 (); 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 */ #ifdef CLUTTER_ENABLE_PROFILE { "clutter-profile", 0, 0, G_OPTION_ARG_CALLBACK, clutter_arg_profile_cb, N_("Clutter profiling flags to set"), "FLAGS" }, { "clutter-no-profile", 0, 0, G_OPTION_ARG_CALLBACK, clutter_arg_no_profile_cb, N_("Clutter profiling flags to unset"), "FLAGS" }, #endif /* CLUTTER_ENABLE_PROFILE */ { "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; if (setlocale (LC_ALL, "") == NULL) g_warning ("Locale not supported by C library.\n" "Using the fallback 'C' locale."); /* read the configuration file, if it exists; the configuration file * determines the initial state of the settings, so that command line * arguments can override them. */ clutter_config_read (); clutter_context = _clutter_context_get_default (); clutter_context->id_pool = _clutter_id_pool_new (256); 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 */ #ifdef CLUTTER_ENABLE_PROFILE env_string = g_getenv ("CLUTTER_PROFILE"); if (env_string != NULL) { clutter_profile_flags = g_parse_debug_string (env_string, clutter_profile_keys, G_N_ELEMENTS (clutter_profile_keys)); env_string = NULL; } #endif /* CLUTTER_ENABLE_PROFILE */ 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; env_string = g_getenv ("CLUTTER_VBLANK"); if (g_strcmp0 (env_string, "none") == 0) clutter_sync_to_vblank = FALSE; 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); g_option_group_set_translation_domain (group, GETTEXT_PACKAGE); /* 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: 0.8.2 */ 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); /* Note: That due to the implementation details of glib's goption * parsing; cogl and uprof will not actually have there arguments * parsed before the post_parse_hook is called! */ #ifdef CLUTTER_ENABLE_PROFILE group = uprof_get_option_group (); g_option_context_add_group (context, group); #endif 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; #ifdef CLUTTER_ENABLE_PROFILE GOptionGroup *uprof_group; #endif 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); #ifdef CLUTTER_ENABLE_PROFILE uprof_group = uprof_get_option_group (); g_option_context_add_group (option_context, uprof_group); #endif 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; /* 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) { ClutterMainContext *context = _clutter_context_get_default (); if (context->pointer_grab_actor == NULL && (device == NULL || device->pointer_grab_actor == NULL)) { /* no grab, time to capture and bubble */ emit_event_chain (event); } else { if (context->pointer_grab_actor != NULL) { /* global grab */ clutter_actor_event (context->pointer_grab_actor, event, FALSE); } else if (device != NULL && device->pointer_grab_actor != NULL) { /* per device grab */ clutter_actor_event (device->pointer_grab_actor, event, FALSE); } } } static inline void emit_touch_event (ClutterEvent *event, ClutterInputDevice *device) { ClutterActor *grab_actor = NULL; 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) { ClutterMainContext *context = _clutter_context_get_default (); if (context->keyboard_grab_actor == NULL && (device == NULL || device->keyboard_grab_actor == NULL)) { /* no grab, time to capture and bubble */ emit_event_chain (event); } else { if (context->keyboard_grab_actor != NULL) { /* global key grab */ clutter_actor_event (context->keyboard_grab_actor, event, FALSE); } else if (device != NULL && device->keyboard_grab_actor != NULL) { /* per-device key grab */ clutter_actor_event (context->keyboard_grab_actor, event, FALSE); } } } 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); } 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: { 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; } } emit_keyboard_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_pointer_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_pointer_event (crossing, device); clutter_event_free (crossing); } } else emit_pointer_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_pointer_event (crossing, device); clutter_event_free (crossing); } emit_pointer_event (event, device); break; case CLUTTER_DESTROY_NOTIFY: case CLUTTER_DELETE: event->any.source = stage; /* the stage did not handle the event, so we just quit */ clutter_stage_event (CLUTTER_STAGE (stage), event); break; case CLUTTER_MOTION: /* 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; /* global grabs */ if (context->pointer_grab_actor != NULL) { clutter_actor_event (context->pointer_grab_actor, event, FALSE); break; } else 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; } /* fallthrough from motion */ case CLUTTER_BUTTON_PRESS: case CLUTTER_BUTTON_RELEASE: case CLUTTER_SCROLL: { 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; /* 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; } /* fallthrough from motion */ 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_STAGE_STATE: /* fullscreen / focus - forward to stage */ event->any.source = stage; 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 not used any longer. */ ClutterActor * clutter_get_actor_by_gid (guint32 id_) { return _clutter_get_actor_by_id (NULL, id_); } void clutter_base_init (void) { static gboolean initialised = FALSE; if (!initialised) { initialised = TRUE; bindtextdomain (GETTEXT_PACKAGE, CLUTTER_LOCALEDIR); bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); #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_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_set_default_frame_rate: * @frames_per_sec: the new default frame rate * * Sets the default frame rate. This frame rate will be used to limit * the number of frames drawn if Clutter is not able to synchronize * with the vertical refresh rate of the display. When synchronization * is possible, this value is ignored. * * Since: 0.6 * * Deprecated: 1.10: This function does not do anything any more. */ void clutter_set_default_frame_rate (guint frames_per_sec) { } static void on_grab_actor_destroy (ClutterActor *actor, ClutterInputDevice *device) { if (device == NULL) { ClutterMainContext *context = _clutter_context_get_default (); if (context->pointer_grab_actor == actor) clutter_ungrab_pointer (); if (context->keyboard_grab_actor == actor) clutter_ungrab_keyboard (); return; } switch (device->device_type) { case CLUTTER_POINTER_DEVICE: device->pointer_grab_actor = NULL; break; case CLUTTER_KEYBOARD_DEVICE: device->keyboard_grab_actor = NULL; break; default: g_assert_not_reached (); } } /** * clutter_grab_pointer: * @actor: a #ClutterActor * * Grabs pointer events, after the grab is done all pointer related events * (press, motion, release, enter, leave and scroll) are delivered to this * actor directly without passing through both capture and bubble phases of * the event delivery chain. The source set in the event will be the actor * that would have received the event if the pointer grab was not in effect. * * Grabs completely override the entire event delivery chain * done by Clutter. Pointer grabs should only be used as a last resource; * using the #ClutterActor::captured-event signal should always be the * preferred way to intercept event delivery to reactive actors. * * This function should rarely be used. * * If a grab is required, you are strongly encouraged to use a specific * input device by calling clutter_input_device_grab(). * * Since: 0.6 */ void clutter_grab_pointer (ClutterActor *actor) { ClutterMainContext *context; g_return_if_fail (actor == NULL || CLUTTER_IS_ACTOR (actor)); context = _clutter_context_get_default (); if (context->pointer_grab_actor == actor) return; if (context->pointer_grab_actor != NULL) { g_signal_handlers_disconnect_by_func (context->pointer_grab_actor, G_CALLBACK (on_grab_actor_destroy), NULL); context->pointer_grab_actor = NULL; } if (actor != NULL) { context->pointer_grab_actor = actor; g_signal_connect (context->pointer_grab_actor, "destroy", G_CALLBACK (on_grab_actor_destroy), NULL); } } /** * clutter_input_device_grab: * @device: a #ClutterInputDevice * @actor: a #ClutterActor * * Acquires a grab on @actor for the given @device. * * Any event coming from @device will be delivered to @actor, bypassing * the usual event delivery mechanism, until the grab is released by * calling clutter_input_device_ungrab(). * * The grab is client-side: even if the windowing system used by the Clutter * backend has the concept of "device grabs", Clutter will not use them. * * Only #ClutterInputDevice of types %CLUTTER_POINTER_DEVICE and * %CLUTTER_KEYBOARD_DEVICE can hold a grab. * * Since: 1.10 */ void clutter_input_device_grab (ClutterInputDevice *device, ClutterActor *actor) { ClutterActor **grab_actor; g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device)); g_return_if_fail (CLUTTER_IS_ACTOR (actor)); switch (device->device_type) { case CLUTTER_POINTER_DEVICE: grab_actor = &(device->pointer_grab_actor); break; case CLUTTER_KEYBOARD_DEVICE: grab_actor = &(device->keyboard_grab_actor); break; default: g_critical ("Only pointer and keyboard devices can grab an actor"); return; } if (*grab_actor != NULL) { g_signal_handlers_disconnect_by_func (*grab_actor, G_CALLBACK (on_grab_actor_destroy), device); } *grab_actor = actor; g_signal_connect (*grab_actor, "destroy", G_CALLBACK (on_grab_actor_destroy), device); } /** * clutter_input_device_ungrab: * @device: a #ClutterInputDevice * * Releases the grab on the @device, if one is in place. * * Since: 1.10 */ void clutter_input_device_ungrab (ClutterInputDevice *device) { ClutterActor **grab_actor; g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device)); switch (device->device_type) { case CLUTTER_POINTER_DEVICE: grab_actor = &(device->pointer_grab_actor); break; case CLUTTER_KEYBOARD_DEVICE: grab_actor = &(device->keyboard_grab_actor); break; default: return; } if (*grab_actor == NULL) return; g_signal_handlers_disconnect_by_func (*grab_actor, G_CALLBACK (on_grab_actor_destroy), device); *grab_actor = NULL; } /** * clutter_input_device_get_grabbed_actor: * @device: a #ClutterInputDevice * * Retrieves a pointer to the #ClutterActor currently grabbing all * the events coming from @device. * * Return value: (transfer none): a #ClutterActor, or %NULL * * Since: 1.10 */ ClutterActor * clutter_input_device_get_grabbed_actor (ClutterInputDevice *device) { g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL); switch (device->device_type) { case CLUTTER_POINTER_DEVICE: return device->pointer_grab_actor; case CLUTTER_KEYBOARD_DEVICE: return device->keyboard_grab_actor; default: g_critical ("Only pointer and keyboard devices can grab an actor"); } return NULL; } /** * clutter_grab_pointer_for_device: * @actor: a #ClutterActor * @id_: a device id, or -1 * * Grabs all the pointer events coming from the device @id for @actor. * * If @id is -1 then this function is equivalent to clutter_grab_pointer(). * * Since: 0.8 * * Deprecated: 1.10: Use clutter_input_device_grab() instead. */ void clutter_grab_pointer_for_device (ClutterActor *actor, gint id_) { ClutterDeviceManager *manager; ClutterInputDevice *dev; g_return_if_fail (actor == NULL || CLUTTER_IS_ACTOR (actor)); /* essentially a global grab */ if (id_ == -1) { if (actor == NULL) clutter_ungrab_pointer (); else clutter_grab_pointer (actor); return; } manager = clutter_device_manager_get_default (); if (manager == NULL) return; dev = clutter_device_manager_get_device (manager, id_); if (dev == NULL) return; if (dev->device_type != CLUTTER_POINTER_DEVICE) return; if (actor == NULL) clutter_input_device_ungrab (dev); else clutter_input_device_grab (dev, actor); } /** * clutter_ungrab_pointer: * * Removes an existing grab of the pointer. * * Since: 0.6 */ void clutter_ungrab_pointer (void) { clutter_grab_pointer (NULL); } /** * clutter_ungrab_pointer_for_device: * @id_: a device id * * Removes an existing grab of the pointer events for device @id_. * * Since: 0.8 * * Deprecated: 1.10: Use clutter_input_device_ungrab() instead. */ void clutter_ungrab_pointer_for_device (gint id_) { ClutterDeviceManager *manager; ClutterInputDevice *device; manager = clutter_device_manager_get_default (); if (manager == NULL) return; device = clutter_device_manager_get_device (manager, id_); if (device != NULL) clutter_input_device_ungrab (device); } /** * clutter_get_pointer_grab: * * Queries the current pointer grab of clutter. * * Return value: (transfer none): the actor currently holding the pointer grab, or NULL if there is no grab. * * Since: 0.6 */ ClutterActor * clutter_get_pointer_grab (void) { ClutterMainContext *context; context = _clutter_context_get_default (); return context->pointer_grab_actor; } /** * clutter_grab_keyboard: * @actor: a #ClutterActor * * Grabs keyboard events, after the grab is done keyboard * events (#ClutterActor::key-press-event and #ClutterActor::key-release-event) * are delivered to this actor directly. The source set in the event will be * the actor that would have received the event if the keyboard grab was not * in effect. * * Like pointer grabs, keyboard grabs should only be used as a last * resource. * * See also clutter_stage_set_key_focus() and clutter_actor_grab_key_focus() * to perform a "soft" key grab and assign key focus to a specific actor. * * Since: 0.6 */ void clutter_grab_keyboard (ClutterActor *actor) { ClutterMainContext *context; g_return_if_fail (actor == NULL || CLUTTER_IS_ACTOR (actor)); context = _clutter_context_get_default (); if (context->keyboard_grab_actor == actor) return; if (context->keyboard_grab_actor != NULL) { g_signal_handlers_disconnect_by_func (context->keyboard_grab_actor, G_CALLBACK (on_grab_actor_destroy), NULL); context->keyboard_grab_actor = NULL; } if (actor != NULL) { context->keyboard_grab_actor = actor; g_signal_connect (context->keyboard_grab_actor, "destroy", G_CALLBACK (on_grab_actor_destroy), NULL); } } /** * clutter_ungrab_keyboard: * * Removes an existing grab of the keyboard. * * Since: 0.6 */ void clutter_ungrab_keyboard (void) { clutter_grab_keyboard (NULL); } /** * clutter_get_keyboard_grab: * * Queries the current keyboard grab of clutter. * * Return value: (transfer none): the actor currently holding the keyboard grab, or NULL if there is no grab. * * Since: 0.6 */ ClutterActor * clutter_get_keyboard_grab (void) { ClutterMainContext *context; context = _clutter_context_get_default (); return context->keyboard_grab_actor; } /** * clutter_clear_glyph_cache: * * Clears the internal cache of glyphs used by the Pango * renderer. This will free up some memory and GL texture * resources. The cache will be automatically refilled as more text is * drawn. * * Since: 0.8 * * Deprecated: 1.10: Use clutter_get_font_map() and * cogl_pango_font_map_clear_glyph_cache() instead. */ void clutter_clear_glyph_cache (void) { CoglPangoFontMap *font_map; font_map = clutter_context_get_pango_fontmap (); cogl_pango_font_map_clear_glyph_cache (font_map); } /** * clutter_set_font_flags: * @flags: The new flags * * Sets the font quality options for subsequent text rendering * operations. * * Using mipmapped textures will improve the quality for scaled down * text but will use more texture memory. * * Enabling hinting improves text quality for static text but may * introduce some artifacts if the text is animated. * * Since: 1.0 * * Deprecated: 1.10: Use clutter_backend_set_font_options() and the * #cairo_font_option_t API. */ void clutter_set_font_flags (ClutterFontFlags flags) { ClutterMainContext *context = _clutter_context_get_default (); CoglPangoFontMap *font_map; ClutterFontFlags old_flags, changed_flags; const cairo_font_options_t *font_options; cairo_font_options_t *new_font_options; cairo_hint_style_t hint_style; gboolean use_mipmapping; ClutterBackend *backend; backend = clutter_get_default_backend (); font_map = clutter_context_get_pango_fontmap (); font_options = clutter_backend_get_font_options (backend); old_flags = 0; if (cogl_pango_font_map_get_use_mipmapping (font_map)) old_flags |= CLUTTER_FONT_MIPMAPPING; hint_style = cairo_font_options_get_hint_style (font_options); if (hint_style != CAIRO_HINT_STYLE_DEFAULT && hint_style != CAIRO_HINT_STYLE_NONE) old_flags |= CLUTTER_FONT_HINTING; if (old_flags == flags) return; new_font_options = cairo_font_options_copy (font_options); /* Only set the font options that have actually changed so we don't override a detailed setting from the backend */ changed_flags = old_flags ^ flags; if ((changed_flags & CLUTTER_FONT_MIPMAPPING)) { use_mipmapping = (changed_flags & CLUTTER_FONT_MIPMAPPING) != 0; cogl_pango_font_map_set_use_mipmapping (font_map, use_mipmapping); } if ((changed_flags & CLUTTER_FONT_HINTING)) { hint_style = (flags & CLUTTER_FONT_HINTING) ? CAIRO_HINT_STYLE_FULL : CAIRO_HINT_STYLE_NONE; cairo_font_options_set_hint_style (new_font_options, hint_style); } clutter_backend_set_font_options (backend, new_font_options); cairo_font_options_destroy (new_font_options); /* update the default pango context, if any */ if (context->pango_context != NULL) update_pango_context (backend, context->pango_context); } /** * clutter_get_font_flags: * * Gets the current font flags for rendering text. See * clutter_set_font_flags(). * * Return value: The font flags * * Since: 1.0 * * Deprecated: 1.10: Use clutter_backend_get_font_options() and the * #cairo_font_options_t API. */ ClutterFontFlags clutter_get_font_flags (void) { CoglPangoFontMap *font_map = NULL; const cairo_font_options_t *font_options; ClutterFontFlags flags = 0; cairo_hint_style_t hint_style; font_map = clutter_context_get_pango_fontmap (); if (cogl_pango_font_map_get_use_mipmapping (font_map)) flags |= CLUTTER_FONT_MIPMAPPING; font_options = clutter_backend_get_font_options (clutter_get_default_backend ()); hint_style = cairo_font_options_get_hint_style (font_options); if (hint_style != CAIRO_HINT_STYLE_DEFAULT && hint_style != CAIRO_HINT_STYLE_NONE) flags |= CLUTTER_FONT_HINTING; return flags; } /** * clutter_get_input_device_for_id: * @id_: the unique id for a device * * Retrieves the #ClutterInputDevice from its @id_. This is a convenience * wrapper for clutter_device_manager_get_device() and it is functionally * equivalent to: * * |[ * ClutterDeviceManager *manager; * ClutterInputDevice *device; * * manager = clutter_device_manager_get_default (); * device = clutter_device_manager_get_device (manager, id); * ]| * * Return value: (transfer none): a #ClutterInputDevice, or %NULL * * Since: 0.8 * * Deprecated: 1.10: Use clutter_device_manager_get_device() instead. */ ClutterInputDevice * clutter_get_input_device_for_id (gint id_) { ClutterDeviceManager *manager; manager = clutter_device_manager_get_default (); if (manager == NULL) return NULL; return clutter_device_manager_get_device (manager, id_); } /** * 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; for instance, uploading * a frame from a video into a #ClutterTexture. 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; for instance, uploading * a frame from a video into a #ClutterTexture. 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_check_version: * @major: major version, like 1 in 1.2.3 * @minor: minor version, like 2 in 1.2.3 * @micro: micro version, like 3 in 1.2.3 * * Run-time version check, to check the version the Clutter library * that an application is currently linked against * * This is the run-time equivalent of the compile-time %CLUTTER_CHECK_VERSION * pre-processor macro * * Return value: %TRUE if the version of the Clutter library is * greater than (@major, @minor, @micro), and %FALSE otherwise * * Since: 1.2 */ gboolean clutter_check_version (guint major, guint minor, guint micro) { return (clutter_major_version > major || (clutter_major_version == major && clutter_minor_version > minor) || (clutter_major_version == major && clutter_minor_version == minor && clutter_micro_version >= micro)); } /** * 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; } } guint32 _clutter_context_acquire_id (gpointer key) { ClutterMainContext *context = _clutter_context_get_default (); return _clutter_id_pool_add (context->id_pool, key); } void _clutter_context_release_id (guint32 id_) { ClutterMainContext *context = _clutter_context_get_default (); _clutter_id_pool_remove (context->id_pool, id_); } 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; } void _clutter_context_push_shader_stack (ClutterActor *actor) { ClutterMainContext *context = _clutter_context_get_default (); context->shaders = g_slist_prepend (context->shaders, actor); } ClutterActor * _clutter_context_peek_shader_stack (void) { ClutterMainContext *context = _clutter_context_get_default (); if (context->shaders != NULL) return context->shaders->data; return NULL; } ClutterActor * _clutter_context_pop_shader_stack (ClutterActor *actor) { ClutterMainContext *context = _clutter_context_get_default (); context->shaders = g_slist_remove (context->shaders, actor); return _clutter_context_peek_shader_stack (); } gboolean _clutter_context_get_motion_events_enabled (void) { ClutterMainContext *context = _clutter_context_get_default (); return context->motion_events_per_actor; } /** * 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_WIN32 or * %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 * #ifdef CLUTTER_WINDOWING_WIN32 * if (clutter_check_windowing_backend (CLUTTER_WINDOWING_WIN32)) * { * /* it is safe to use the clutter_win32_* 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_OSX if (backend_type == I_(CLUTTER_WINDOWING_OSX) && CLUTTER_IS_BACKEND_OSX (context->backend)) return TRUE; else #endif #ifdef CLUTTER_WINDOWING_WIN32 if (backend_type == I_(CLUTTER_WINDOWING_WIN32) && CLUTTER_IS_BACKEND_WIN32 (context->backend)) return TRUE; else #endif #ifdef CLUTTER_WINDOWING_WAYLAND if (backend_type == I_(CLUTTER_WINDOWING_WAYLAND) && CLUTTER_IS_BACKEND_WAYLAND (context->backend)) return TRUE; else #endif #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_GDK if (backend_type == I_(CLUTTER_WINDOWING_GDK) && CLUTTER_IS_BACKEND_GDK (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; } gboolean _clutter_get_sync_to_vblank (void) { return clutter_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); #ifdef CLUTTER_ENABLE_PROFILE if (_clutter_uprof_context != NULL) uprof_context_vtrace_message (_clutter_uprof_context, format, var_args); #endif 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); }