f1a1399927
Add clutter_backend_get_n_screens(), which returns the number of screens manager by the ClutterBackend, and change clutter_backend_get_screen_number() to return the screen number of the currently used screen; this is semantically equivalent to clutter_glx_get_default_screen(), but leaves the door open for a "screen" abstraction in Clutter, handled by the backend. Update the GLX and EGL backends to retrieve and set the screen_num and n_screens members of ClutterBackend using Xlib calls.
377 lines
8.9 KiB
C
377 lines
8.9 KiB
C
#include "config.h"
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#include "clutter-backend-egl.h"
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#include "clutter-stage-egl.h"
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#include "../clutter-private.h"
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#include "../clutter-main.h"
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#include "../clutter-debug.h"
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static ClutterBackendEgl *backend_singleton = NULL;
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/* options */
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static gchar *clutter_display_name = NULL;
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static gint clutter_screen = 0;
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/* X error trap */
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static int TrappedErrorCode = 0;
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static int (*old_error_handler) (Display *, XErrorEvent *);
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G_DEFINE_TYPE (ClutterBackendEgl, clutter_backend_egl, CLUTTER_TYPE_BACKEND);
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static gboolean
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clutter_backend_egl_pre_parse (ClutterBackend *backend,
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GError **error)
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{
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const gchar *env_string;
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/* we don't fail here if DISPLAY is not set, as the user
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* might pass the --display command line switch
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*/
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env_string = g_getenv ("DISPLAY");
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if (env_string)
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{
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clutter_display_name = g_strdup (env_string);
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env_string = NULL;
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}
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return TRUE;
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}
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static gboolean
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clutter_backend_egl_post_parse (ClutterBackend *backend,
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GError **error)
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{
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ClutterBackendEgl *backend_egl = CLUTTER_BACKEND_EGL (backend);
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if (clutter_display_name)
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{
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backend_egl->xdpy = XOpenDisplay (clutter_display_name);
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}
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else
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"Unable to open display. You have to set the DISPLAY "
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"environment variable, or use the --display command "
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"line argument");
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return FALSE;
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}
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if (backend_egl->xdpy)
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{
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CLUTTER_NOTE (MISC, "Getting the X screen");
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if (clutter_screen == 0)
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backend_egl->xscreen = DefaultScreenOfDisplay (backend_egl->xdpy);
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else
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backend_egl->xscreen = ScreenOfDisplay (backend_egl->xdpy,
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clutter_screen);
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backend_egl->xscreen_num = XScreenNumberOfScreen (backend_egl->xscreen);
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backend_egl->xwin_root = RootWindow (backend_egl->xdpy,
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backend_egl->xscreen_num);
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backend_egl->display_name = g_strdup (clutter_display_name);
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/* generic backend properties */
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backend->res_width = WidthOfScreen (backend_egl->xscreen);
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backend->res_height = HeightOfScreen (backend_egl->xscreen);
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backend->mm_width = WidthMMOfScreen (backend_egl->xscreen);
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backend->mm_height = HeightMMOfScreen (backend_egl->xscreen);
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backend->screen_num = backend_egl->xscreen_num;
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backend->n_screens = ScreenCount (backend_egl->xdpy)
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}
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g_free (clutter_display_name);
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CLUTTER_NOTE (MISC, "X Display `%s' [%p] opened (screen:%d, root:%u)",
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backend_egl->display_name,
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backend_egl->xdpy,
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backend_egl->xscreen_num,
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(unsigned int) backend_egl->xwin_root);
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return TRUE;
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}
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static gboolean
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clutter_backend_egl_init_stage (ClutterBackend *backend,
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GError **error)
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{
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ClutterBackendEgl *backend_egl = CLUTTER_BACKEND_EGL (backend);
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if (!backend_egl->stage)
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{
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ClutterStageEgl *stage_egl;
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ClutterActor *stage;
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stage = g_object_new (CLUTTER_TYPE_STAGE_EGL, NULL);
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/* copy backend data into the stage */
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stage_egl = CLUTTER_STAGE_EGL (stage);
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stage_egl->xdpy = backend_egl->xdpy;
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stage_egl->xwin_root = backend_egl->xwin_root;
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stage_egl->xscreen = backend_egl->xscreen_num;
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g_object_set_data (G_OBJECT (stage), "clutter-backend", backend);
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backend_egl->stage = g_object_ref_sink (stage);
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}
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clutter_actor_realize (backend_egl->stage);
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if (!CLUTTER_ACTOR_IS_REALIZED (backend_egl->stage))
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_INTERNAL,
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"Unable to realize the main stage");
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return FALSE;
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}
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return TRUE;
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}
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static void
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clutter_backend_egl_init_events (ClutterBackend *backend)
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{
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_clutter_events_init (backend);
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}
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static const GOptionEntry entries[] =
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{
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{
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"display", 0,
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G_OPTION_FLAG_IN_MAIN,
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G_OPTION_ARG_STRING, &clutter_display_name,
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"X display to use", "DISPLAY"
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},
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{
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"screen", 0,
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G_OPTION_FLAG_IN_MAIN,
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G_OPTION_ARG_INT, &clutter_screen,
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"X screen to use", "SCREEN"
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},
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{ NULL }
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};
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static void
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clutter_backend_egl_add_options (ClutterBackend *backend,
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GOptionGroup *group)
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{
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g_option_group_add_entries (group, entries);
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}
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static ClutterActor *
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clutter_backend_egl_get_stage (ClutterBackend *backend)
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{
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return NULL;
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}
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static void
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clutter_backend_egl_finalize (GObject *gobject)
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{
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ClutterBackendEgl *backend_egl = CLUTTER_BACKEND_EGL (gobject);
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g_free (backend_egl->display_name);
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XCloseDisplay (backend_egl->xdpy);
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if (backend_singleton)
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backend_singleton = NULL;
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G_OBJECT_CLASS (clutter_backend_egl_parent_class)->finalize (gobject);
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}
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static void
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clutter_backend_egl_dispose (GObject *gobject)
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{
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ClutterBackendEgl *backend_egl = CLUTTER_BACKEND_EGL (gobject);
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_clutter_events_uninit (CLUTTER_BACKEND (backend_egl));
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if (backend_egl->stage)
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{
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g_object_unref (backend_egl->stage);
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backend_egl->stage = NULL;
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}
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G_OBJECT_CLASS (clutter_backend_egl_parent_class)->dispose (gobject);
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}
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static GObject *
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clutter_backend_egl_constructor (GType gtype,
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guint n_params,
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GObjectConstructParam *params)
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{
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GObjectClass *parent_class;
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GObject *retval;
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if (!backend_singleton)
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{
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parent_class = G_OBJECT_CLASS (clutter_backend_egl_parent_class);
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retval = parent_class->constructor (gtype, n_params, params);
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backend_singleton = CLUTTER_BACKEND_EGL (retval);
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return retval;
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}
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g_warning ("Attempting to create a new backend object. This should "
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"never happen, so we return the singleton instance.");
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return g_object_ref (backend_singleton);
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}
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static void
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clutter_backend_egl_class_init (ClutterBackendEglClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
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gobject_class->constructor = clutter_backend_egl_constructor;
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gobject_class->dispose = clutter_backend_egl_dispose;
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gobject_class->finalize = clutter_backend_egl_finalize;
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backend_class->pre_parse = clutter_backend_egl_pre_parse;
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backend_class->post_parse = clutter_backend_egl_post_parse;
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backend_class->init_stage = clutter_backend_egl_init_stage;
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backend_class->init_events = clutter_backend_egl_init_events;
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backend_class->get_stage = clutter_backend_egl_get_stage;
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backend_class->add_options = clutter_backend_egl_add_options;
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}
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static void
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clutter_backend_egl_init (ClutterBackendEgl *backend_egl)
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{
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ClutterBackend *backend = CLUTTER_BACKEND (backend_egl);
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backend->events_queue = g_queue_new ();
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backend->button_click_time[0] = backend->button_click_time[1] = 0;
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backend->button_number[0] = backend->button_number[1] = -1;
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backend->button_x[0] = backend->button_x[1] = 0;
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backend->button_y[0] = backend->button_y[1] = 0;
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backend->res_width = backend->res_height = -1;
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backend->mm_width = backend->mm_height = -1;
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backend->screen_num = 0;
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backend->n_screens = 0;
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backend->double_click_time = 250;
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backend->double_click_distance = 5
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}
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GType
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_clutter_backend_impl_get_type (void)
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{
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return clutter_backend_egl_get_type ();
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}
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static int
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error_handler(Display *xdpy,
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XErrorEvent *error)
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{
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TrappedErrorCode = error->error_code;
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return 0;
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}
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/**
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* clutter_egl_trap_x_errors:
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*
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* FIXME
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*
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* Since: 0.4
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*/
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void
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clutter_egl_trap_x_errors (void)
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{
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TrappedErrorCode = 0;
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old_error_handler = XSetErrorHandler (error_handler);
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}
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/**
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* clutter_egl_untrap_x_errors:
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*
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* FIXME
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*
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* Return value: FIXME
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*
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* Since: 0.4
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*/
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gint
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clutter_egl_untrap_x_errors (void)
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{
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XSetErrorHandler (old_error_handler);
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return TrappedErrorCode;
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}
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/**
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* clutter_egl_get_default_display:
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*
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* FIXME
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*
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* Return value: FIXME
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*
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* Since: 0.4
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*/
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Display *
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clutter_egl_get_default_display (void)
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{
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if (!backend_singleton)
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{
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g_critical ("EGL backend has not been initialised");
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return NULL;
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}
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return backend_singleton->xdpy;
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}
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/**
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* clutter_egl_get_default_screen:
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*
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* FIXME
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*
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* Return value: FIXME
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*
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* Since: 0.4
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*/
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gint
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clutter_egl_get_default_screen (void)
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{
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if (!backend_singleton)
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{
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g_critical ("EGL backend has not been initialised");
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return -1;
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}
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return backend_singleton->xscreen_num;
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}
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/**
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* clutter_egl_get_default_root_window:
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*
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* FIXME
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*
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* Return value: FIXME
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*
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* Since: 0.4
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*/
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Window
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clutter_egl_get_default_root_window (void)
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{
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if (!backend_singleton)
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{
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g_critical ("EGL backend has not been initialised");
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return None;
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}
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return backend_singleton->xwin_root;
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}
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EGLDisplay
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clutter_egl_display (void)
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{
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return (EGLDisplay)clutter_egl_get_default_display ();
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}
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