mutter/clutter/cogl/clutter-backend-cogl.c
Emmanuele Bassi 405e72f2e4 egl: First attempt at cleaning up the EGL native backend
At least, let's make it compile when built along with the other
backends. In reality, it still needs to be verified as working.
2011-11-03 13:45:20 +00:00

208 lines
5.5 KiB
C

/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2010,2011 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-cogl.h"
#include "clutter-stage-cogl.h"
#include "clutter-debug.h"
#include "clutter-private.h"
#include "clutter-main.h"
#include "clutter-stage-private.h"
static ClutterBackendCogl *backend_singleton = NULL;
static gchar *clutter_vblank = NULL;
G_DEFINE_TYPE (ClutterBackendCogl, _clutter_backend_cogl, CLUTTER_TYPE_BACKEND);
const gchar*
_clutter_backend_cogl_get_vblank (void)
{
if (clutter_vblank && strcmp (clutter_vblank, "0") == 0)
return "none";
else
return clutter_vblank;
}
static gboolean
clutter_backend_cogl_pre_parse (ClutterBackend *backend,
GError **error)
{
const gchar *env_string;
env_string = g_getenv ("CLUTTER_VBLANK");
if (env_string)
{
clutter_vblank = g_strdup (env_string);
env_string = NULL;
}
return TRUE;
}
static gboolean
clutter_backend_cogl_post_parse (ClutterBackend *backend,
GError **error)
{
return TRUE;
}
static void
clutter_backend_cogl_finalize (GObject *gobject)
{
if (backend_singleton)
backend_singleton = NULL;
G_OBJECT_CLASS (_clutter_backend_cogl_parent_class)->finalize (gobject);
}
static void
clutter_backend_cogl_dispose (GObject *gobject)
{
ClutterBackend *backend = CLUTTER_BACKEND (gobject);
if (backend->cogl_context)
{
cogl_object_unref (backend->cogl_context);
backend->cogl_context = NULL;
}
G_OBJECT_CLASS (_clutter_backend_cogl_parent_class)->dispose (gobject);
}
static GObject *
clutter_backend_cogl_constructor (GType gtype,
guint n_params,
GObjectConstructParam *params)
{
GObjectClass *parent_class;
GObject *retval;
if (backend_singleton == NULL)
{
parent_class = G_OBJECT_CLASS (_clutter_backend_cogl_parent_class);
retval = parent_class->constructor (gtype, n_params, params);
backend_singleton = CLUTTER_BACKEND_COGL (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_cogl_get_features (ClutterBackend *backend)
{
ClutterBackendCogl *backend_cogl = CLUTTER_BACKEND_COGL (backend);
ClutterFeatureFlags flags = 0;
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_cogl->can_blit_sub_buffer = TRUE;
}
return flags;
}
static void
clutter_backend_cogl_ensure_context (ClutterBackend *backend,
ClutterStage *stage)
{
ClutterStageCogl *stage_cogl;
/* ignore ensuring the context on an empty stage */
if (stage == NULL)
return;
stage_cogl =
CLUTTER_STAGE_COGL (_clutter_stage_get_window (stage));
cogl_set_framebuffer (COGL_FRAMEBUFFER (stage_cogl->onscreen));
}
static void
_clutter_backend_cogl_class_init (ClutterBackendCoglClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
gobject_class->constructor = clutter_backend_cogl_constructor;
gobject_class->dispose = clutter_backend_cogl_dispose;
gobject_class->finalize = clutter_backend_cogl_finalize;
backend_class->pre_parse = clutter_backend_cogl_pre_parse;
backend_class->post_parse = clutter_backend_cogl_post_parse;
backend_class->get_features = clutter_backend_cogl_get_features;
backend_class->ensure_context = clutter_backend_cogl_ensure_context;
}
static void
_clutter_backend_cogl_init (ClutterBackendCogl *backend_cogl)
{
}