mutter/clutter/egl/clutter-backend-egl.c

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
* Authors:
* Matthew Allum
* Emmanuele Bassi
* Robert Bragg
* Neil Roberts
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "clutter-backend-egl.h"
#include "clutter-stage-egl.h"
#include "clutter-egl.h"
#ifdef HAVE_EVDEV
#include "clutter-device-manager-evdev.h"
#endif
#include "clutter-debug.h"
#include "clutter-private.h"
#include "clutter-main.h"
#include "clutter-stage-private.h"
/* FIXME: We should have CLUTTER_ define for this... */
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
#include "clutter-cex100.h"
#endif
static ClutterBackendEGL *backend_singleton = NULL;
static gchar *clutter_vblank = NULL;
/* FIXME: We should have CLUTTER_ define for this... */
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
static gdl_plane_id_t gdl_plane = GDL_PLANE_ID_UPP_C;
static guint gdl_n_buffers = CLUTTER_CEX100_TRIPLE_BUFFERING;
#endif
#ifdef COGL_HAS_X11_SUPPORT
G_DEFINE_TYPE (ClutterBackendEGL, _clutter_backend_egl, CLUTTER_TYPE_BACKEND_X11);
#else
G_DEFINE_TYPE (ClutterBackendEGL, _clutter_backend_egl, CLUTTER_TYPE_BACKEND);
#endif
static void
clutter_backend_at_exit (void)
{
if (backend_singleton)
g_object_run_dispose (G_OBJECT (backend_singleton));
}
G_CONST_RETURN gchar*
_clutter_backend_egl_get_vblank (void)
{
if (clutter_vblank && strcmp (clutter_vblank, "0") == 0)
return "none";
else
return clutter_vblank;
}
static gboolean
clutter_backend_egl_pre_parse (ClutterBackend *backend,
GError **error)
{
const gchar *env_string;
#ifdef COGL_HAS_X11_SUPPORT
ClutterBackendClass *parent_class =
CLUTTER_BACKEND_CLASS (_clutter_backend_egl_parent_class);
if (!parent_class->pre_parse (backend, error))
return FALSE;
#endif
env_string = g_getenv ("CLUTTER_VBLANK");
if (env_string)
{
clutter_vblank = g_strdup (env_string);
env_string = NULL;
}
return TRUE;
}
static gboolean
clutter_backend_egl_post_parse (ClutterBackend *backend,
GError **error)
{
#ifdef COGL_HAS_X11_SUPPORT
ClutterBackendClass *parent_class =
CLUTTER_BACKEND_CLASS (_clutter_backend_egl_parent_class);
2007-07-09 17:59:01 -04:00
if (!parent_class->post_parse (backend, error))
return FALSE;
return TRUE;
#endif
g_atexit (clutter_backend_at_exit);
return TRUE;
}
#ifndef COGL_HAS_XLIB_SUPPORT
static ClutterDeviceManager *
clutter_backend_egl_get_device_manager (ClutterBackend *backend)
{
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
if (G_UNLIKELY (backend_egl->device_manager == NULL))
{
#ifdef HAVE_EVDEV
backend_egl->device_manager =
g_object_new (CLUTTER_TYPE_DEVICE_MANAGER_EVDEV,
"backend", backend_egl,
NULL);
#endif
}
return backend_egl->device_manager;
}
#endif
static void
clutter_backend_egl_init_events (ClutterBackend *backend)
{
#ifdef HAVE_TSLIB
/* XXX: This should be renamed to _clutter_events_tslib_init */
_clutter_events_egl_init (CLUTTER_BACKEND_EGL (backend));
#endif
#ifdef HAVE_EVDEV
_clutter_events_evdev_init (CLUTTER_BACKEND (backend));
#endif
#ifdef COGL_HAS_X11_SUPPORT
/* Chain up to the X11 backend */
CLUTTER_BACKEND_CLASS (_clutter_backend_egl_parent_class)->
init_events (backend);
#endif
}
static void
clutter_backend_egl_finalize (GObject *gobject)
{
if (backend_singleton)
backend_singleton = NULL;
G_OBJECT_CLASS (_clutter_backend_egl_parent_class)->finalize (gobject);
}
static void
clutter_backend_egl_dispose (GObject *gobject)
{
ClutterBackend *backend = CLUTTER_BACKEND (gobject);
#ifdef HAVE_TSLIB
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (gobject);
#endif
/* We chain up before disposing our CoglContext so that we will
* destroy all of the stages first. Otherwise the actors may try to
* make Cogl calls during destruction which would cause a crash */
G_OBJECT_CLASS (_clutter_backend_egl_parent_class)->dispose (gobject);
if (backend->cogl_context)
{
cogl_object_unref (backend->cogl_context);
backend->cogl_context = NULL;
}
#ifdef HAVE_TSLIB
/* XXX: This should be renamed to _clutter_events_tslib_uninit */
_clutter_events_egl_uninit (backend_egl);
if (backend_egl->event_timer != NULL)
{
g_timer_destroy (backend_egl->event_timer);
backend_egl->event_timer = NULL;
}
#endif
}
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 ClutterFeatureFlags
clutter_backend_egl_get_features (ClutterBackend *backend)
{
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
#ifdef COGL_HAS_XLIB_SUPPORT
ClutterBackendClass *parent_class;
#endif
ClutterFeatureFlags flags = 0;
#ifdef COGL_HAS_XLIB_SUPPORT
parent_class = CLUTTER_BACKEND_CLASS (_clutter_backend_egl_parent_class);
flags = parent_class->get_features (backend);
#endif
if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_MULTIPLE_ONSCREEN))
{
CLUTTER_NOTE (BACKEND, "Cogl supports multiple onscreen framebuffers");
flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
}
else
{
CLUTTER_NOTE (BACKEND, "Cogl only supports one onscreen framebuffer");
flags |= CLUTTER_FEATURE_STAGE_STATIC;
}
if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_THROTTLE))
{
CLUTTER_NOTE (BACKEND, "Cogl supports swap buffers throttling");
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
}
else
CLUTTER_NOTE (BACKEND, "Cogl doesn't support swap buffers throttling");
if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_BUFFERS_EVENT))
{
CLUTTER_NOTE (BACKEND, "Cogl supports swap buffers complete events");
flags |= CLUTTER_FEATURE_SWAP_EVENTS;
}
if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_REGION))
{
CLUTTER_NOTE (BACKEND, "Cogl supports swapping buffer regions");
backend_egl->can_blit_sub_buffer = TRUE;
}
return flags;
}
#ifdef COGL_HAS_XLIB_SUPPORT
static XVisualInfo *
clutter_backend_egl_get_visual_info (ClutterBackendX11 *backend_x11)
{
return cogl_clutter_winsys_xlib_get_visual_info ();
}
#endif
static gboolean
clutter_backend_egl_create_context (ClutterBackend *backend,
GError **error)
{
#ifdef COGL_HAS_XLIB_SUPPORT
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
#endif
CoglSwapChain *swap_chain = NULL;
CoglOnscreenTemplate *onscreen_template = NULL;
if (backend->cogl_context)
return TRUE;
backend->cogl_renderer = cogl_renderer_new ();
#ifdef COGL_HAS_XLIB_SUPPORT
cogl_renderer_xlib_set_foreign_display (backend->cogl_renderer,
backend_x11->xdpy);
#endif
if (!cogl_renderer_connect (backend->cogl_renderer, error))
goto error;
swap_chain = cogl_swap_chain_new ();
#ifdef COGL_HAS_XLIB_SUPPORT
cogl_swap_chain_set_has_alpha (swap_chain,
clutter_x11_get_use_argb_visual ());
#endif
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
cogl_swap_chain_set_length (swap_chain, gdl_n_buffers);
#endif
onscreen_template = cogl_onscreen_template_new (swap_chain);
cogl_object_unref (swap_chain);
/* XXX: I have some doubts that this is a good design.
* Conceptually should we be able to check an onscreen_template
* without more details about the CoglDisplay configuration?
*/
if (!cogl_renderer_check_onscreen_template (backend->cogl_renderer,
onscreen_template,
error))
goto error;
backend->cogl_display = cogl_display_new (backend->cogl_renderer,
onscreen_template);
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
cogl_gdl_display_set_plane (backend->cogl_display, gdl_plane);
#endif
cogl_object_unref (backend->cogl_renderer);
cogl_object_unref (onscreen_template);
if (!cogl_display_setup (backend->cogl_display, error))
goto error;
backend->cogl_context = cogl_context_new (backend->cogl_display, error);
if (!backend->cogl_context)
goto error;
/* XXX: eventually this should go away but a lot of Cogl code still
* depends on a global default context. */
cogl_set_default_context (backend->cogl_context);
return TRUE;
error:
if (backend->cogl_display)
{
cogl_object_unref (backend->cogl_display);
backend->cogl_display = NULL;
}
if (onscreen_template)
cogl_object_unref (onscreen_template);
if (swap_chain)
cogl_object_unref (swap_chain);
if (backend->cogl_renderer)
{
cogl_object_unref (backend->cogl_renderer);
backend->cogl_renderer = NULL;
}
return FALSE;
}
static ClutterStageWindow *
clutter_backend_egl_create_stage (ClutterBackend *backend,
ClutterStage *wrapper,
GError **error)
{
#ifdef COGL_HAS_XLIB_SUPPORT
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
ClutterEventTranslator *translator;
ClutterStageWindow *stage;
ClutterStageX11 *stage_x11;
stage = g_object_new (CLUTTER_TYPE_STAGE_EGL, NULL);
/* copy backend data into the stage */
stage_x11 = CLUTTER_STAGE_X11 (stage);
stage_x11->wrapper = wrapper;
stage_x11->backend = backend_x11;
translator = CLUTTER_EVENT_TRANSLATOR (stage_x11);
_clutter_backend_add_event_translator (backend, translator);
CLUTTER_NOTE (MISC, "EGLX stage created (display:%p, screen:%d, root:%u)",
backend_x11->xdpy,
backend_x11->xscreen_num,
(unsigned int) backend_x11->xwin_root);
#else /* COGL_HAS_XLIB_SUPPORT */
ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
ClutterStageWindow *stage;
ClutterStageEGL *stage_egl;
if (G_UNLIKELY (backend_egl->stage != NULL))
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"The Cogl backend does not support multiple "
"onscreen windows");
return backend_egl->stage;
}
stage = g_object_new (CLUTTER_TYPE_STAGE_EGL, NULL);
stage_egl = CLUTTER_STAGE_EGL (stage);
stage_egl->backend = backend_egl;
stage_egl->wrapper = wrapper;
backend_egl->stage = stage;
#endif /* COGL_HAS_XLIB_SUPPORT */
return stage;
}
static void
clutter_backend_egl_ensure_context (ClutterBackend *backend,
ClutterStage *stage)
{
ClutterStageEGL *stage_egl =
CLUTTER_STAGE_EGL (_clutter_stage_get_window (stage));
cogl_set_framebuffer (COGL_FRAMEBUFFER (stage_egl->onscreen));
}
static void
_clutter_backend_egl_class_init (ClutterBackendEGLClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
#ifdef COGL_HAS_X11_SUPPORT
ClutterBackendX11Class *backendx11_class = CLUTTER_BACKEND_X11_CLASS (klass);
#endif
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->get_features = clutter_backend_egl_get_features;
#ifndef COGL_HAS_XLIB_SUPPORT
backend_class->get_device_manager = clutter_backend_egl_get_device_manager;
#endif
backend_class->init_events = clutter_backend_egl_init_events;
backend_class->create_stage = clutter_backend_egl_create_stage;
backend_class->create_context = clutter_backend_egl_create_context;
backend_class->ensure_context = clutter_backend_egl_ensure_context;
#ifdef COGL_HAS_XLIB_SUPPORT
backendx11_class->get_visual_info = clutter_backend_egl_get_visual_info;
#endif
}
static void
_clutter_backend_egl_init (ClutterBackendEGL *backend_egl)
{
#ifdef HAVE_TSLIB
backend_egl->event_timer = g_timer_new ();
#endif
}
GType
_clutter_backend_impl_get_type (void)
{
return _clutter_backend_egl_get_type ();
}
EGLDisplay
clutter_eglx_display (void)
{
return clutter_egl_get_egl_display ();
}
EGLDisplay
clutter_egl_display (void)
{
return clutter_egl_get_egl_display ();
}
EGLDisplay
clutter_egl_get_egl_display (void)
{
if (backend_singleton == NULL)
{
g_critical ("%s has been called before clutter_init()", G_STRFUNC);
return 0;
}
return cogl_context_egl_get_egl_display (backend_singleton->cogl_context);
}
/* FIXME we should have a CLUTTER_ define for this */
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
void
clutter_cex100_set_plane (gdl_plane_id_t plane)
{
g_return_if_fail (plane >= GDL_PLANE_ID_UPP_A && plane <= GDL_PLANE_ID_UPP_E);
gdl_plane = plane;
}
void
clutter_cex100_set_buffering_mode (ClutterCex100BufferingMode mode)
{
g_return_if_fail (mode == CLUTTER_CEX100_DOUBLE_BUFFERING ||
mode == CLUTTER_CEX100_TRIPLE_BUFFERING);
gdl_n_buffers = mode;
}
#endif