/* Clutter. * An OpenGL based 'interactive canvas' library. * Authored By Matthew Allum * Copyright (C) 2006-2007 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, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #ifdef HAVE_UNISTD_H #include #endif #include #include #include #include #include "clutter-backend-x11.h" #include "clutter-stage-x11.h" #include "clutter-x11.h" #include "../clutter-event.h" #include "../clutter-main.h" #include "../clutter-debug.h" #include "../clutter-private.h" #include "cogl/cogl.h" G_DEFINE_TYPE (ClutterBackendX11, clutter_backend_x11, CLUTTER_TYPE_BACKEND); /* atoms; remember to add the code that assigns the atom value to * the member of the ClutterBackendX11 structure if you add an * atom name here. do not change the order! */ static const gchar *atom_names[] = { "_NET_WM_PING", "_NET_WM_STATE", "_NET_WM_STATE_FULLSCREEN", "_NET_WM_USER_TIME", "WM_PROTOCOLS", "WM_DELETE_WINDOW", "_XEMBED", "_XEMBED_INFO", "_NET_WM_NAME", "UTF8_STRING", }; static const guint n_atom_names = G_N_ELEMENTS (atom_names); /* singleton object */ static ClutterBackendX11 *backend_singleton = NULL; /* options */ static gchar *clutter_display_name = NULL; static gint clutter_screen = 0; static gboolean clutter_synchronise = FALSE; /* X error trap */ static int TrappedErrorCode = 0; static int (* old_error_handler) (Display *, XErrorEvent *); gboolean clutter_backend_x11_pre_parse (ClutterBackend *backend, GError **error) { const gchar *env_string; /* we don't fail here if DISPLAY is not set, as the user * might pass the --display command line switch */ env_string = g_getenv ("DISPLAY"); if (env_string) { clutter_display_name = g_strdup (env_string); env_string = NULL; } return TRUE; } gboolean clutter_backend_x11_post_parse (ClutterBackend *backend, GError **error) { ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend); /* * Only open connection if not already set by prior call to * clutter_x11_set_display() */ if (!backend_x11->xdpy) { if (clutter_display_name) { CLUTTER_NOTE (BACKEND, "XOpenDisplay on `%s'", clutter_display_name); backend_x11->xdpy = XOpenDisplay (clutter_display_name); } else { g_set_error (error, CLUTTER_INIT_ERROR, CLUTTER_INIT_ERROR_BACKEND, "Unable to open display. You have to set the DISPLAY " "environment variable, or use the --display command " "line argument"); return FALSE; } } if (backend_x11->xdpy) { Atom atoms[n_atom_names]; double dpi; CLUTTER_NOTE (BACKEND, "Getting the X screen"); if (clutter_screen == 0) backend_x11->xscreen = DefaultScreenOfDisplay (backend_x11->xdpy); else backend_x11->xscreen = ScreenOfDisplay (backend_x11->xdpy, clutter_screen); backend_x11->xscreen_num = XScreenNumberOfScreen (backend_x11->xscreen); backend_x11->xwin_root = RootWindow (backend_x11->xdpy, backend_x11->xscreen_num); backend_x11->display_name = g_strdup (clutter_display_name); dpi = (((double) DisplayHeight (backend_x11->xdpy, backend_x11->xscreen_num) * 25.4) / (double) DisplayHeightMM (backend_x11->xdpy, backend_x11->xscreen_num)); clutter_backend_set_resolution (backend, dpi); if (clutter_synchronise) XSynchronize (backend_x11->xdpy, True); XInternAtoms (backend_x11->xdpy, (char **) atom_names, n_atom_names, False, atoms); backend_x11->atom_NET_WM_PING = atoms[0]; backend_x11->atom_NET_WM_STATE = atoms[1]; backend_x11->atom_NET_WM_STATE_FULLSCREEN = atoms[2]; backend_x11->atom_NET_WM_USER_TIME = atoms[3]; backend_x11->atom_WM_PROTOCOLS = atoms[4]; backend_x11->atom_WM_DELETE_WINDOW = atoms[5]; backend_x11->atom_XEMBED = atoms[6]; backend_x11->atom_XEMBED_INFO = atoms[7]; backend_x11->atom_NET_WM_NAME = atoms[8]; backend_x11->atom_UTF8_STRING = atoms[9]; } g_free (clutter_display_name); CLUTTER_NOTE (BACKEND, "X Display `%s'[%p] opened (screen:%d, root:%u, dpi:%f)", backend_x11->display_name, backend_x11->xdpy, backend_x11->xscreen_num, (unsigned int) backend_x11->xwin_root, clutter_backend_get_resolution (backend)); return TRUE; } static void clutter_backend_x11_init_events (ClutterBackend *backend) { CLUTTER_NOTE (EVENT, "initialising the event loop"); _clutter_backend_x11_events_init (backend); } static const GOptionEntry entries[] = { { "display", 0, G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_STRING, &clutter_display_name, "X display to use", "DISPLAY" }, { "screen", 0, G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_INT, &clutter_screen, "X screen to use", "SCREEN" }, { "synch", 0, 0, G_OPTION_ARG_NONE, &clutter_synchronise, "Make X calls synchronous", NULL, }, { NULL } }; void clutter_backend_x11_add_options (ClutterBackend *backend, GOptionGroup *group) { g_option_group_add_entries (group, entries); } static void clutter_backend_x11_finalize (GObject *gobject) { ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (gobject); g_free (backend_x11->display_name); XCloseDisplay (backend_x11->xdpy); if (backend_singleton) backend_singleton = NULL; G_OBJECT_CLASS (clutter_backend_x11_parent_class)->finalize (gobject); } static void clutter_backend_x11_dispose (GObject *gobject) { ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (gobject); ClutterMainContext *context; ClutterStageManager *stage_manager; CLUTTER_NOTE (BACKEND, "Disposing the of stages"); context = clutter_context_get_default (); stage_manager = context->stage_manager; /* Destroy all of the stages. g_slist_foreach is used because the finalizer for the stages will remove the stage from the stage_manager's list and g_slist_foreach has some basic protection against this */ g_slist_foreach (stage_manager->stages, (GFunc) clutter_actor_destroy, NULL); CLUTTER_NOTE (BACKEND, "Removing the event source"); _clutter_backend_x11_events_uninit (CLUTTER_BACKEND (backend_x11)); G_OBJECT_CLASS (clutter_backend_x11_parent_class)->dispose (gobject); } static GObject * clutter_backend_x11_constructor (GType gtype, guint n_params, GObjectConstructParam *params) { GObjectClass *parent_class; GObject *retval; if (!backend_singleton) { parent_class = G_OBJECT_CLASS (clutter_backend_x11_parent_class); retval = parent_class->constructor (gtype, n_params, params); backend_singleton = CLUTTER_BACKEND_X11 (retval); return retval; } g_warning ("Attempting to create a new backend object. This should " "never happen, so we return the singleton instance."); return g_object_ref (backend_singleton); } ClutterFeatureFlags clutter_backend_x11_get_features (ClutterBackend *backend) { return CLUTTER_FEATURE_STAGE_USER_RESIZE | CLUTTER_FEATURE_STAGE_CURSOR; } static void clutter_backend_x11_class_init (ClutterBackendX11Class *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass); gobject_class->constructor = clutter_backend_x11_constructor; gobject_class->dispose = clutter_backend_x11_dispose; gobject_class->finalize = clutter_backend_x11_finalize; backend_class->pre_parse = clutter_backend_x11_pre_parse; backend_class->post_parse = clutter_backend_x11_post_parse; backend_class->init_events = clutter_backend_x11_init_events; backend_class->add_options = clutter_backend_x11_add_options; backend_class->get_features = clutter_backend_x11_get_features; } static void clutter_backend_x11_init (ClutterBackendX11 *backend_x11) { ClutterBackend *backend = CLUTTER_BACKEND (backend_x11); /* FIXME: get from xsettings */ clutter_backend_set_double_click_time (backend, 250); clutter_backend_set_double_click_distance (backend, 5); clutter_backend_set_resolution (backend, 96.0); } static int error_handler(Display *xdpy, XErrorEvent *error) { TrappedErrorCode = error->error_code; return 0; } /** * clutter_x11_trap_x_errors: * * Traps every X error until clutter_x11_untrap_x_errors() is called. * * Since: 0.6 */ void clutter_x11_trap_x_errors (void) { TrappedErrorCode = 0; old_error_handler = XSetErrorHandler (error_handler); } /** * clutter_x11_untrap_x_errors: * * Removes the X error trap and returns the current status. * * Return value: the trapped error code, or 0 for success * * Since: 0.4 */ gint clutter_x11_untrap_x_errors (void) { XSetErrorHandler (old_error_handler); return TrappedErrorCode; } /** * clutter_x11_get_default_display: * * Retrieves the pointer to the default display. * * Return value: the default display * * Since: 0.6 */ Display * clutter_x11_get_default_display (void) { if (!backend_singleton) { g_critical ("X11 backend has not been initialised"); return NULL; } return backend_singleton->xdpy; } /** * clutter_x11_set_display: * @xdpy: pointer to a X display connection. * * Sets the display connection clutter should use; must be called * before clutter_init(). * * Since: 0.8 */ void clutter_x11_set_display (Display *xdpy) { if (!xdpy) return; if (!backend_singleton) { /* * This creates the singleton objects */ clutter_context_get_default (); if (!backend_singleton) { g_critical ("X11 backend could not be initialised."); return; } } if (backend_singleton->xdpy) { g_critical ("Display connection already exists. You can only call " "clutter_x11_set_display() once before clutter_init()\n"); return; } backend_singleton->xdpy = xdpy; } /** * clutter_x11_get_default_screen: * * Gets the number of the default X Screen object. * * Return value: the number of the default screen * * Since: 0.6 */ int clutter_x11_get_default_screen (void) { if (!backend_singleton) { g_critical ("X11 backend has not been initialised"); return 0; } return backend_singleton->xscreen_num; } /** * clutter_x11_get_root_window: * * Retrieves the root window. * * Return value: the id of the root window * * Since: 0.6 */ Window clutter_x11_get_root_window (void) { if (!backend_singleton) { g_critical ("X11 backend has not been initialised"); return None; } return backend_singleton->xwin_root; } /** * clutter_x11_add_filter: * @func: a filter function * @data: user data to be passed to the filter function, or %NULL * * Adds an event filter function. * * Since: 0.6 */ void clutter_x11_add_filter (ClutterX11FilterFunc func, gpointer data) { ClutterX11EventFilter *filter; g_return_if_fail (func != NULL); if (!backend_singleton) { g_critical ("X11 backend has not been initialised"); return; } filter = g_new0 (ClutterX11EventFilter, 1); filter->func = func; filter->data = data; backend_singleton->event_filters = g_slist_append (backend_singleton->event_filters, filter); return; } /** * clutter_x11_remove_filter: * @func: a filter function * @data: user data to be passed to the filter function, or %NULL * * Removes the given filter function. * * Since: 0.6 */ void clutter_x11_remove_filter (ClutterX11FilterFunc func, gpointer data) { GSList *tmp_list, *this; ClutterX11EventFilter *filter; g_return_if_fail (func != NULL); tmp_list = backend_singleton->event_filters; while (tmp_list) { filter = tmp_list->data; this = tmp_list; tmp_list = tmp_list->next; if (filter->func == func && filter->data == data) { backend_singleton->event_filters = g_slist_remove_link (backend_singleton->event_filters, this); g_slist_free_1 (this); g_free (filter); return; } } }