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ClutterBackend; ClutterBackend * clutter_get_default_backend (void); void clutter_backend_set_resolution (ClutterBackend *backend,gdouble dpi); gdouble clutter_backend_get_resolution (ClutterBackend *backend); void clutter_backend_set_double_click_time (ClutterBackend *backend,guint msec); guint clutter_backend_get_double_click_time (ClutterBackend *backend); void clutter_backend_set_double_click_distance (ClutterBackend *backend,guint distance); guint clutter_backend_get_double_click_distance (ClutterBackend *backend); void clutter_backend_set_font_options (ClutterBackend *backend,const cairo_font_options_t *options); const cairo_font_options_t * clutter_backend_get_font_options (ClutterBackend *backend); void clutter_backend_set_font_name (ClutterBackend *backend,const gchar *font_name); const gchar * clutter_backend_get_font_name (ClutterBackend *backend); CoglContext * clutter_backend_get_cogl_context (ClutterBackend *backend); gboolean clutter_check_windowing_backend (const char *backend_type); void clutter_set_windowing_backend (const char *backend_type);
Clutter can be compiled against different backends. Each backend has to implement a set of functions, in order to be used by Clutter.
ClutterBackend is the base class abstracting the various implementation; it provides a basic API to query the backend for generic information and settings.
ClutterBackend is available since Clutter 0.4
typedef struct _ClutterBackend ClutterBackend;
ClutterBackend is an opaque structure whose members cannot be directly accessed.
Since 0.4
ClutterBackend *    clutter_get_default_backend         (void);
Retrieves the default ClutterBackend used by Clutter. The ClutterBackend holds backend-specific configuration options.
| Returns : | the default backend. You should not ref or unref the returned object. Applications should rarely need to use this. [transfer none] | 
Since 0.4
void clutter_backend_set_resolution (ClutterBackend *backend,gdouble dpi);
clutter_backend_set_resolution has been deprecated since version 1.4 and should not be used in newly-written code. Use "font-dpi" instead
Sets the resolution for font handling on the screen. This is a scale factor between points specified in a PangoFontDescription and cairo units. The default value is 96, meaning that a 10 point font will be 13 units high. (10 * 96. / 72. = 13.3).
Applications should never need to call this function.
| 
 | a ClutterBackend | 
| 
 | the resolution in "dots per inch" (Physical inches aren't actually involved; the terminology is conventional). | 
Since 0.4
gdouble             clutter_backend_get_resolution      (ClutterBackend *backend);
Gets the resolution for font handling on the screen.
The resolution is a scale factor between points specified in a PangoFontDescription and cairo units. The default value is 96.0, meaning that a 10 point font will be 13 units high (10 * 96. / 72. = 13.3).
Clutter will set the resolution using the current backend when initializing; the resolution is also stored in the "font-dpi" property.
| 
 | a ClutterBackend | 
| Returns : | the current resolution, or -1 if no resolution has been set. | 
Since 0.4
void clutter_backend_set_double_click_time (ClutterBackend *backend,guint msec);
clutter_backend_set_double_click_time has been deprecated since version 1.4 and should not be used in newly-written code. Use "double-click-time" instead
Sets the maximum time between two button press events, used to verify whether it's a double click event or not.
| 
 | a ClutterBackend | 
| 
 | milliseconds between two button press events | 
Since 0.4
guint               clutter_backend_get_double_click_time
                                                        (ClutterBackend *backend);
clutter_backend_get_double_click_time has been deprecated since version 1.4 and should not be used in newly-written code. Use "double-click-time" instead
Gets the maximum time between two button press events, as set
by clutter_backend_set_double_click_time().
| 
 | a ClutterBackend | 
| Returns : | a time in milliseconds | 
Since 0.4
void clutter_backend_set_double_click_distance (ClutterBackend *backend,guint distance);
clutter_backend_set_double_click_distance has been deprecated since version 1.4 and should not be used in newly-written code. Use "double-click-distance" instead
Sets the maximum distance used to verify a double click event.
| 
 | a ClutterBackend | 
| 
 | a distance, in pixels | 
Since 0.4
guint               clutter_backend_get_double_click_distance
                                                        (ClutterBackend *backend);
clutter_backend_get_double_click_distance has been deprecated since version 1.4 and should not be used in newly-written code. Use "double-click-distance" instead
Retrieves the distance used to verify a double click event
| 
 | a ClutterBackend | 
| Returns : | a distance, in pixels. | 
Since 0.4
void clutter_backend_set_font_options (ClutterBackend *backend,const cairo_font_options_t *options);
Sets the new font options for backend. The ClutterBackend will
copy the cairo_font_options_t.
If options is NULL, the first following call to
clutter_backend_get_font_options() will return the default font
options for backend.
This function is intended for actors creating a Pango layout using the PangoCairo API.
| 
 | a ClutterBackend | 
| 
 | Cairo font options for the backend, or NULL | 
Since 0.8
const cairo_font_options_t * clutter_backend_get_font_options
                                                        (ClutterBackend *backend);
Retrieves the font options for backend.
| 
 | a ClutterBackend | 
| Returns : | the font options of the ClutterBackend. The returned cairo_font_options_t is owned by the backend and should not be modified or freed. [transfer none] | 
Since 0.8
void clutter_backend_set_font_name (ClutterBackend *backend,const gchar *font_name);
clutter_backend_set_font_name has been deprecated since version 1.4 and should not be used in newly-written code. Use "font-name" instead
Sets the default font to be used by Clutter. The font_name string
must either be NULL, which means that the font name from the
default ClutterBackend will be used; or be something that can
be parsed by the pango_font_description_from_string() function.
| 
 | a ClutterBackend | 
| 
 | the name of the font | 
Since 1.0
const gchar *       clutter_backend_get_font_name       (ClutterBackend *backend);
clutter_backend_get_font_name has been deprecated since version 1.4 and should not be used in newly-written code. Use "font-name" instead
Retrieves the default font name as set by
clutter_backend_set_font_name().
| 
 | a ClutterBackend | 
| Returns : | the font name for the backend. The returned string is owned by the ClutterBackend and should never be modified or freed | 
Since 1.0
CoglContext *       clutter_backend_get_cogl_context    (ClutterBackend *backend);
Retrieves the CoglContext associated with the given clutter
backend. A CoglContext is required when using some of the
experimental 2.0 Cogl API.
| 
 | a ClutterBackend | 
| Returns : | The CoglContext associated with backend. [transfer none] | 
Since 1.8
Stability Level: Unstable
gboolean            clutter_check_windowing_backend     (const char *backend_type);
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:
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | #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."); | 
| 
 | the name of the backend to check | 
| Returns : | TRUEif the current Clutter windowing system backend is
the one checked, andFALSEotherwise | 
Since 1.10
void                clutter_set_windowing_backend       (const char *backend_type);
Restricts clutter to only use the specified backend.
This must be called before the first API call to clutter, including
clutter_get_option_context()
| 
 | the name of a clutter window backend | 
Since 1.16
"font-changed" signalvoid                user_function                      (ClutterBackend *backend,
                                                        gpointer        user_data)      : Run First
The ::font-changed signal is emitted each time the font options have been changed through ClutterSettings.
| 
 | the ClutterBackend that emitted the signal | 
| 
 | user data set when the signal handler was connected. | 
Since 1.0
"resolution-changed" signalvoid                user_function                      (ClutterBackend *backend,
                                                        gpointer        user_data)      : Run First
The ::resolution-changed signal is emitted each time the font resolutions has been changed through ClutterSettings.
| 
 | the ClutterBackend that emitted the signal | 
| 
 | user data set when the signal handler was connected. | 
Since 1.0
"settings-changed" signalvoid                user_function                      (ClutterBackend *backend,
                                                        gpointer        user_data)      : Run First
The ::settings-changed signal is emitted each time the ClutterSettings properties have been changed.
| 
 | the ClutterBackend that emitted the signal | 
| 
 | user data set when the signal handler was connected. | 
Since 1.4