mutter/clutter/clutter-feature.c
Emmanuele Bassi e30df678ae 2007-06-07 Emmanuele Bassi <ebassi@openedhand.com>
* clutter/*: Move documentation from the templates into the
	source code.
2007-06-07 15:28:59 +00:00

116 lines
2.6 KiB
C

/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:clutter-feature
* @short_description: Query GL features at runtime
*
* Functions to query available GL features ay runtime
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "clutter-feature.h"
#include "clutter-main.h"
#include "clutter-private.h"
#include "clutter-debug.h"
#include "cogl.h"
typedef struct ClutterFeatures
{
ClutterFeatureFlags flags;
guint features_set : 1;
} ClutterFeatures;
static ClutterFeatures* __features = NULL;
void
_clutter_feature_init (void)
{
ClutterMainContext *context;
CLUTTER_NOTE (MISC, "checking features");
if (!__features)
{
CLUTTER_NOTE (MISC, "allocating features data");
__features = g_new0 (ClutterFeatures, 1);
__features->features_set = FALSE; /* don't rely on zero-ing */
}
if (__features->features_set)
return;
context = clutter_context_get_default ();
__features->flags = cogl_get_features()
|_clutter_backend_get_features (context->backend);
__features->features_set = TRUE;
CLUTTER_NOTE (MISC, "features checked");
}
/**
* clutter_feature_available:
* @feature: a #ClutterFeatureFlags
*
* Checks whether @feature is available. @feature can be a logical
* OR of #ClutterFeatureFlags.
*
* Return value: %TRUE if a feature is available
*
* Since: 0.1.1
*/
gboolean
clutter_feature_available (ClutterFeatureFlags feature)
{
if (G_UNLIKELY (!__features))
return FALSE;
return (__features->flags & feature);
}
/**
* clutter_feature_get_all:
*
* Returns all the supported features.
*
* Return value: a logical OR of all the supported features.
*
* Since: 0.1.1
*/
ClutterFeatureFlags
clutter_feature_get_all (void)
{
return __features->flags;
}