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Input backends are, in some cases, independent from the windowing system backends; we can initialize input handling using a model similar to what we use for windowing backends, including an environment variable and compile-/run-time checks. This model allows us to remove the backend-specific init_events(), and use a generic implementation directly inside the base ClutterBackend class, thus further reducing the backend-specific code that every platform has to implement. This requires some minor surgery to every single backend, to make sure that the function exposed to initialize the event loop is similar and performs roughly the same operations.
343 lines
8.5 KiB
C
343 lines
8.5 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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* Copyright (C) 2010,2011 Intel Corporation.
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* 2011 Giovanni Campagna <scampa.giovanni@gmail.com>
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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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* Authors:
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* Matthew Allum
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* Emmanuele Bassi
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* Robert Bragg
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* Neil Roberts
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include "clutter-backend-eglnative.h"
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/* This is a Cogl based backend */
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#include "cogl/clutter-stage-cogl.h"
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#ifdef HAVE_EVDEV
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#include "clutter-device-manager-evdev.h"
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#endif
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#ifdef HAVE_TSLIB
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#include "clutter-event-tslib.h"
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#endif
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#include "clutter-debug.h"
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#include "clutter-private.h"
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#include "clutter-main.h"
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#include "clutter-stage-private.h"
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#ifdef COGL_HAS_EGL_SUPPORT
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#include "clutter-egl.h"
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#endif
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#ifdef CLUTTER_EGL_BACKEND_CEX100
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#include "clutter-cex100.h"
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#endif
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#ifdef CLUTTER_EGL_BACKEND_CEX100
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static gdl_plane_id_t gdl_plane = GDL_PLANE_ID_UPP_C;
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static guint gdl_n_buffers = CLUTTER_CEX100_TRIPLE_BUFFERING;
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#endif
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#define clutter_backend_egl_native_get_type _clutter_backend_egl_native_get_type
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G_DEFINE_TYPE (ClutterBackendEglNative, clutter_backend_egl_native, CLUTTER_TYPE_BACKEND_COGL);
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static ClutterDeviceManager *
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clutter_backend_egl_native_get_device_manager (ClutterBackend *backend)
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{
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ClutterBackendEglNative *backend_egl_native = CLUTTER_BACKEND_EGL_NATIVE (backend);
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if (G_UNLIKELY (backend_egl_native->device_manager == NULL))
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{
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#ifdef HAVE_EVDEV
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backend_egl_native->device_manager =
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g_object_new (CLUTTER_TYPE_DEVICE_MANAGER_EVDEV,
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"backend", backend_egl_native,
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NULL);
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#endif
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}
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return backend_egl_native->device_manager;
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}
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static void
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clutter_backend_egl_native_dispose (GObject *gobject)
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{
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ClutterBackendEglNative *backend_egl_native = CLUTTER_BACKEND_EGL_NATIVE (gobject);
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if (backend_egl_native->event_timer != NULL)
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{
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g_timer_destroy (backend_egl_native->event_timer);
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backend_egl_native->event_timer = NULL;
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}
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#ifdef HAVE_TSLIB
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_clutter_events_tslib_uninit (CLUTTER_BACKEND (gobject));
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#endif
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#ifdef HAVE_EVDEV
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_clutter_events_evdev_uninit (CLUTTER_BACKEND (gobject));
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if (backend_egl_native->device_manager != NULL)
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{
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g_object_unref (backend_egl_native->device_manager);
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backend_egl_native->device_manager = NULL;
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}
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#endif
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G_OBJECT_CLASS (clutter_backend_egl_native_parent_class)->dispose (gobject);
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}
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static ClutterStageWindow *
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clutter_backend_egl_native_create_stage (ClutterBackend *backend,
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ClutterStage *wrapper,
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GError **error)
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{
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ClutterBackendEglNative *backend_egl_native = CLUTTER_BACKEND_EGL_NATIVE (backend);
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ClutterStageWindow *stage;
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if (G_UNLIKELY (backend_egl_native->stage != NULL))
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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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"The EglNative backend does not support multiple "
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"onscreen windows");
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return backend_egl_native->stage;
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}
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stage = g_object_new (CLUTTER_TYPE_STAGE_COGL,
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"backend", backend,
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"wrapper", wrapper,
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NULL);
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backend_egl_native->stage = stage;
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return stage;
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}
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static gboolean
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clutter_backend_egl_native_create_context (ClutterBackend *backend,
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GError **error)
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{
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CoglSwapChain *swap_chain = NULL;
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CoglOnscreenTemplate *onscreen_template = NULL;
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if (backend->cogl_context != NULL)
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return TRUE;
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backend->cogl_renderer = cogl_renderer_new ();
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if (!cogl_renderer_connect (backend->cogl_renderer, error))
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goto error;
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swap_chain = cogl_swap_chain_new ();
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#if defined(CLUTTER_EGL_BACKEND_CEX100) && defined(COGL_HAS_GDL_SUPPORT)
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cogl_swap_chain_set_length (swap_chain, gdl_n_buffers);
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#endif
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onscreen_template = cogl_onscreen_template_new (swap_chain);
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cogl_object_unref (swap_chain);
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/* XXX: I have some doubts that this is a good design.
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* Conceptually should we be able to check an onscreen_template
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* without more details about the CoglDisplay configuration?
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*/
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if (!cogl_renderer_check_onscreen_template (backend->cogl_renderer,
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onscreen_template,
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error))
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goto error;
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backend->cogl_display = cogl_display_new (backend->cogl_renderer,
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onscreen_template);
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#if defined(CLUTTER_EGL_BACKEND_CEX100) && defined(COGL_HAS_GDL_SUPPORT)
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cogl_gdl_display_set_plane (backend->cogl_display, gdl_plane);
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#endif /* CLUTTER_EGL_BACKEND_CEX100 */
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cogl_object_unref (backend->cogl_renderer);
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cogl_object_unref (onscreen_template);
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if (!cogl_display_setup (backend->cogl_display, error))
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goto error;
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backend->cogl_context = cogl_context_new (backend->cogl_display, error);
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if (backend->cogl_context == NULL)
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goto error;
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return TRUE;
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error:
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if (backend->cogl_display != NULL)
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{
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cogl_object_unref (backend->cogl_display);
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backend->cogl_display = NULL;
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}
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if (onscreen_template != NULL)
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cogl_object_unref (onscreen_template);
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if (swap_chain != NULL)
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cogl_object_unref (swap_chain);
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if (backend->cogl_renderer != NULL)
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{
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cogl_object_unref (backend->cogl_renderer);
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backend->cogl_renderer = NULL;
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}
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return FALSE;
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}
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static void
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clutter_backend_egl_native_class_init (ClutterBackendEglNativeClass *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->dispose = clutter_backend_egl_native_dispose;
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backend_class->get_device_manager = clutter_backend_egl_native_get_device_manager;
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backend_class->create_stage = clutter_backend_egl_native_create_stage;
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backend_class->create_context = clutter_backend_egl_native_create_context;
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}
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static void
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clutter_backend_egl_native_init (ClutterBackendEglNative *backend_egl_native)
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{
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backend_egl_native->event_timer = g_timer_new ();
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}
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#ifdef CLUTTER_EGL_BACKEND_CEX100
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/**
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* clutter_cex100_set_plane:
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* @plane: FIXME
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*
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* FIXME
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*
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* Since:
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*/
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void
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clutter_cex100_set_plane (gdl_plane_id_t plane)
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{
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g_return_if_fail (plane >= GDL_PLANE_ID_UPP_A && plane <= GDL_PLANE_ID_UPP_E);
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gdl_plane = plane;
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}
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#endif
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#ifdef CLUTTER_EGL_BACKEND_CEX100
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/**
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* clutter_cex100_set_plane:
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* @mode: FIXME
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*
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* FIXME
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*
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* Since:
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*/
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void
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clutter_cex100_set_buffering_mode (ClutterCex100BufferingMode mode)
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{
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g_return_if_fail (mode == CLUTTER_CEX100_DOUBLE_BUFFERING ||
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mode == CLUTTER_CEX100_TRIPLE_BUFFERING);
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gdl_n_buffers = mode;
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}
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#endif
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/**
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* clutter_eglx_display:
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*
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* Retrieves the EGL display used by Clutter.
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*
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* Return value: the EGL display, or 0
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*
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* Since: 0.6
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*
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* Deprecated: 1.6: Use clutter_egl_get_egl_display() instead.
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*/
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EGLDisplay
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clutter_eglx_display (void)
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{
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return clutter_egl_get_egl_display ();
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}
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/**
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* clutter_egl_display:
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*
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* Retrieves the EGL display used by Clutter.
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*
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* Return value: the EGL display used by Clutter, or 0
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*
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* Since: 0.6
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*
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* Deprecated: 1.6: Use clutter_egl_get_egl_display() instead.
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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 clutter_egl_get_egl_display ();
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}
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/**
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* clutter_egl_get_egl_display:
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*
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* Retrieves the EGL display used by Clutter, if it supports the
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* EGL windowing system and if it is running using an EGL backend.
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*
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* Return value: the EGL display used by Clutter, or 0
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*
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* Since: 1.6
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*/
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EGLDisplay
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clutter_egl_get_egl_display (void)
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{
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ClutterBackend *backend;
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if (!_clutter_context_is_initialized ())
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{
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g_critical ("The Clutter backend has not been initialized yet");
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return 0;
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}
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backend = clutter_get_default_backend ();
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if (!CLUTTER_IS_BACKEND_EGL_NATIVE (backend))
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{
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g_critical ("The Clutter backend is not an EGL backend");
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return 0;
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}
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#if COGL_HAS_EGL_SUPPORT
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return cogl_egl_context_get_egl_display (backend->cogl_context);
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#else
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return 0;
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#endif
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}
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