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21a24c862e
Portable code should be allowed to check type backend currently being
used, so that it can use platform-specific API (not just Clutter's).
We don't want to go down the GDK route, with public types for
ClutterBackend and ClutterStageWindow implementations, and use the type
system, e.g.:
#ifdef GDK_WINDOWING_X11
if (GDK_IS_WINDOW_X11 (window))
use_x11_api (window);
else
#endif
#ifdef GDK_WINDOWING_WIN32
if (GDK_IS_WINDOW_WIN32 (window))
use_win32_api (window);
else
#endif
g_critical ("Unsupported backend");
This system would make us expose the backend system, and we want to
still reserve us the option to change the backend system to increase its
granularity — e.g. choosing different input event systems regardless of
the windowing system.
This commit adds a simple function that checks the backend type against
a symbolic constant — the same constant string that can be used to
select the backend at run-time through the CLUTTER_BACKEND environment
variable.
146 lines
4.1 KiB
C
146 lines
4.1 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#ifndef __CLUTTER_BACKEND_H__
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#define __CLUTTER_BACKEND_H__
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#include <cairo.h>
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#include <glib-object.h>
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#include <pango/pango.h>
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#ifdef COGL_ENABLE_EXPERIMENTAL_2_0_API
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#include <cogl/cogl.h>
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#endif
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#include <clutter/clutter-actor.h>
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#include <clutter/clutter-device-manager.h>
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#include <clutter/clutter-event.h>
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#include <clutter/clutter-feature.h>
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#include <clutter/clutter-stage.h>
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#include <clutter/clutter-stage-window.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_BACKEND (clutter_backend_get_type ())
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#define CLUTTER_BACKEND(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_BACKEND, ClutterBackend))
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#define CLUTTER_IS_BACKEND(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_BACKEND))
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/**
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* CLUTTER_OSX_BACKEND:
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*
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* Evaluates to the symbolic name of the Quartz Clutter backend.
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*
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* This macro should be used with clutter_check_backend().
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*
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* Since: 1.10
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*/
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#define CLUTTER_OSX_BACKEND "osx"
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/**
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* CLUTTER_X11_BACKEND:
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*
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* Evaluates to the symbolic name of the X11 Clutter backend.
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*
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* This macro should be used with clutter_check_backend().
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*
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* Since: 1.10
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*/
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#define CLUTTER_X11_BACKEND "x11"
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/**
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* CLUTTER_WIN32_BACKEND:
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*
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* Evaluates to the symbolic name of the Windows Clutter backend.
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*
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* This macro should be used with clutter_check_backend().
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*
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* Since: 1.10
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*/
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#define CLUTTER_WIN32_BACKEND "win32"
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/**
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* CLUTTER_EGL_NATIVE_BACKEND:
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*
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* Evaluates to the symbolic name of the EGL framebuffer Clutter backend.
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*
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* This macro should be used with clutter_check_backend().
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*
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* Since: 1.10
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*/
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#define CLUTTER_EGL_NATIVE_BACKEND "eglnative"
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/**
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* CLUTTER_WAYLAND_BACKEND:
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*
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* Evaluates to the symbolic name of the Wayland client Clutter backend.
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*
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* This macro should be used with clutter_check_backend().
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*
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* Since: 1.10
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*/
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#define CLUTTER_WAYLAND_BACKEND "wayland"
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/**
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* CLUTTER_GDK_BACKEND:
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*
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* Evaluates to the symbolic name of the GDK Clutter backend.
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*
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* This macro should be used with clutter_check_backend().
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*
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* Since: 1.10
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*/
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#define CLUTTER_GDK_BACKEND "gdk"
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/**
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* ClutterBackend:
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*
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* <structname>ClutterBackend</structname> is an opaque structure whose
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* members cannot be directly accessed.
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*
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* Since: 0.4
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*/
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typedef struct _ClutterBackend ClutterBackend;
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typedef struct _ClutterBackendClass ClutterBackendClass;
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GType clutter_backend_get_type (void) G_GNUC_CONST;
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ClutterBackend *clutter_get_default_backend (void);
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gdouble clutter_backend_get_resolution (ClutterBackend *backend);
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void clutter_backend_set_font_options (ClutterBackend *backend,
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const cairo_font_options_t *options);
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const cairo_font_options_t *clutter_backend_get_font_options (ClutterBackend *backend);
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#if defined (COGL_ENABLE_EXPERIMENTAL_2_0_API) && defined (CLUTTER_ENABLE_EXPERIMENTAL_API)
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CoglContext *clutter_backend_get_cogl_context (ClutterBackend *backend);
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#endif
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G_END_DECLS
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#endif /* __CLUTTER_BACKEND_H__ */
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