mutter/clutter/egl/clutter-backend-egl.c
Emmanuele Bassi f1a1399927 Add clutter_backend_get_n_screens()
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.
2007-04-19 15:26:28 +00:00

377 lines
8.9 KiB
C

#include "config.h"
#include "clutter-backend-egl.h"
#include "clutter-stage-egl.h"
#include "../clutter-private.h"
#include "../clutter-main.h"
#include "../clutter-debug.h"
static ClutterBackendEgl *backend_singleton = NULL;
/* options */
static gchar *clutter_display_name = NULL;
static gint clutter_screen = 0;
/* X error trap */
static int TrappedErrorCode = 0;
static int (*old_error_handler) (Display *, XErrorEvent *);
G_DEFINE_TYPE (ClutterBackendEgl, clutter_backend_egl, CLUTTER_TYPE_BACKEND);
static gboolean
clutter_backend_egl_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;
}
static gboolean
clutter_backend_egl_post_parse (ClutterBackend *backend,
GError **error)
{
ClutterBackendEgl *backend_egl = CLUTTER_BACKEND_EGL (backend);
if (clutter_display_name)
{
backend_egl->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_egl->xdpy)
{
CLUTTER_NOTE (MISC, "Getting the X screen");
if (clutter_screen == 0)
backend_egl->xscreen = DefaultScreenOfDisplay (backend_egl->xdpy);
else
backend_egl->xscreen = ScreenOfDisplay (backend_egl->xdpy,
clutter_screen);
backend_egl->xscreen_num = XScreenNumberOfScreen (backend_egl->xscreen);
backend_egl->xwin_root = RootWindow (backend_egl->xdpy,
backend_egl->xscreen_num);
backend_egl->display_name = g_strdup (clutter_display_name);
/* generic backend properties */
backend->res_width = WidthOfScreen (backend_egl->xscreen);
backend->res_height = HeightOfScreen (backend_egl->xscreen);
backend->mm_width = WidthMMOfScreen (backend_egl->xscreen);
backend->mm_height = HeightMMOfScreen (backend_egl->xscreen);
backend->screen_num = backend_egl->xscreen_num;
backend->n_screens = ScreenCount (backend_egl->xdpy)
}
g_free (clutter_display_name);
CLUTTER_NOTE (MISC, "X Display `%s' [%p] opened (screen:%d, root:%u)",
backend_egl->display_name,
backend_egl->xdpy,
backend_egl->xscreen_num,
(unsigned int) backend_egl->xwin_root);
return TRUE;
}
static gboolean
clutter_backend_egl_init_stage (ClutterBackend *backend,
GError **error)
{
ClutterBackendEgl *backend_egl = CLUTTER_BACKEND_EGL (backend);
if (!backend_egl->stage)
{
ClutterStageEgl *stage_egl;
ClutterActor *stage;
stage = g_object_new (CLUTTER_TYPE_STAGE_EGL, NULL);
/* copy backend data into the stage */
stage_egl = CLUTTER_STAGE_EGL (stage);
stage_egl->xdpy = backend_egl->xdpy;
stage_egl->xwin_root = backend_egl->xwin_root;
stage_egl->xscreen = backend_egl->xscreen_num;
g_object_set_data (G_OBJECT (stage), "clutter-backend", backend);
backend_egl->stage = g_object_ref_sink (stage);
}
clutter_actor_realize (backend_egl->stage);
if (!CLUTTER_ACTOR_IS_REALIZED (backend_egl->stage))
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_INTERNAL,
"Unable to realize the main stage");
return FALSE;
}
return TRUE;
}
static void
clutter_backend_egl_init_events (ClutterBackend *backend)
{
_clutter_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"
},
{ NULL }
};
static void
clutter_backend_egl_add_options (ClutterBackend *backend,
GOptionGroup *group)
{
g_option_group_add_entries (group, entries);
}
static ClutterActor *
clutter_backend_egl_get_stage (ClutterBackend *backend)
{
return NULL;
}
static void
clutter_backend_egl_finalize (GObject *gobject)
{
ClutterBackendEgl *backend_egl = CLUTTER_BACKEND_EGL (gobject);
g_free (backend_egl->display_name);
XCloseDisplay (backend_egl->xdpy);
if (backend_singleton)
backend_singleton = NULL;
G_OBJECT_CLASS (clutter_backend_egl_parent_class)->finalize (gobject);
}
static void
clutter_backend_egl_dispose (GObject *gobject)
{
ClutterBackendEgl *backend_egl = CLUTTER_BACKEND_EGL (gobject);
_clutter_events_uninit (CLUTTER_BACKEND (backend_egl));
if (backend_egl->stage)
{
g_object_unref (backend_egl->stage);
backend_egl->stage = NULL;
}
G_OBJECT_CLASS (clutter_backend_egl_parent_class)->dispose (gobject);
}
static GObject *
clutter_backend_egl_constructor (GType gtype,
guint n_params,
GObjectConstructParam *params)
{
GObjectClass *parent_class;
GObject *retval;
if (!backend_singleton)
{
parent_class = G_OBJECT_CLASS (clutter_backend_egl_parent_class);
retval = parent_class->constructor (gtype, n_params, params);
backend_singleton = CLUTTER_BACKEND_EGL (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);
}
static void
clutter_backend_egl_class_init (ClutterBackendEglClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
gobject_class->constructor = clutter_backend_egl_constructor;
gobject_class->dispose = clutter_backend_egl_dispose;
gobject_class->finalize = clutter_backend_egl_finalize;
backend_class->pre_parse = clutter_backend_egl_pre_parse;
backend_class->post_parse = clutter_backend_egl_post_parse;
backend_class->init_stage = clutter_backend_egl_init_stage;
backend_class->init_events = clutter_backend_egl_init_events;
backend_class->get_stage = clutter_backend_egl_get_stage;
backend_class->add_options = clutter_backend_egl_add_options;
}
static void
clutter_backend_egl_init (ClutterBackendEgl *backend_egl)
{
ClutterBackend *backend = CLUTTER_BACKEND (backend_egl);
backend->events_queue = g_queue_new ();
backend->button_click_time[0] = backend->button_click_time[1] = 0;
backend->button_number[0] = backend->button_number[1] = -1;
backend->button_x[0] = backend->button_x[1] = 0;
backend->button_y[0] = backend->button_y[1] = 0;
backend->res_width = backend->res_height = -1;
backend->mm_width = backend->mm_height = -1;
backend->screen_num = 0;
backend->n_screens = 0;
backend->double_click_time = 250;
backend->double_click_distance = 5
}
GType
_clutter_backend_impl_get_type (void)
{
return clutter_backend_egl_get_type ();
}
static int
error_handler(Display *xdpy,
XErrorEvent *error)
{
TrappedErrorCode = error->error_code;
return 0;
}
/**
* clutter_egl_trap_x_errors:
*
* FIXME
*
* Since: 0.4
*/
void
clutter_egl_trap_x_errors (void)
{
TrappedErrorCode = 0;
old_error_handler = XSetErrorHandler (error_handler);
}
/**
* clutter_egl_untrap_x_errors:
*
* FIXME
*
* Return value: FIXME
*
* Since: 0.4
*/
gint
clutter_egl_untrap_x_errors (void)
{
XSetErrorHandler (old_error_handler);
return TrappedErrorCode;
}
/**
* clutter_egl_get_default_display:
*
* FIXME
*
* Return value: FIXME
*
* Since: 0.4
*/
Display *
clutter_egl_get_default_display (void)
{
if (!backend_singleton)
{
g_critical ("EGL backend has not been initialised");
return NULL;
}
return backend_singleton->xdpy;
}
/**
* clutter_egl_get_default_screen:
*
* FIXME
*
* Return value: FIXME
*
* Since: 0.4
*/
gint
clutter_egl_get_default_screen (void)
{
if (!backend_singleton)
{
g_critical ("EGL backend has not been initialised");
return -1;
}
return backend_singleton->xscreen_num;
}
/**
* clutter_egl_get_default_root_window:
*
* FIXME
*
* Return value: FIXME
*
* Since: 0.4
*/
Window
clutter_egl_get_default_root_window (void)
{
if (!backend_singleton)
{
g_critical ("EGL backend has not been initialised");
return None;
}
return backend_singleton->xwin_root;
}
EGLDisplay
clutter_egl_display (void)
{
return (EGLDisplay)clutter_egl_get_default_display ();
}