mirror of
https://github.com/brl/mutter.git
synced 2024-12-11 22:10:16 +00:00
ea662b9eca
The features section of the API reference is built but not used, and it has some copy-and-paste errors.
148 lines
3.6 KiB
C
148 lines
3.6 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: Run-time detection of Clutter features
|
|
*
|
|
* Parts of Clutter depend on the underlying platform, including the
|
|
* capabilities of the backend used and the OpenGL features exposed through the
|
|
* Clutter and COGL API.
|
|
*
|
|
* It is possible to ask whether Clutter has support for specific features at
|
|
* run-time.
|
|
*
|
|
* See also cogl_get_features() and #CoglFeatureFlags
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#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/cogl.h"
|
|
|
|
typedef struct ClutterFeatures
|
|
{
|
|
ClutterFeatureFlags flags;
|
|
guint features_set : 1;
|
|
} ClutterFeatures;
|
|
|
|
static ClutterFeatures* __features = NULL;
|
|
|
|
ClutterFeatureFlags
|
|
_clutter_features_from_cogl (guint cogl_flags)
|
|
{
|
|
ClutterFeatureFlags clutter_flags = 0;
|
|
|
|
if (cogl_flags & COGL_FEATURE_TEXTURE_NPOT)
|
|
clutter_flags |= CLUTTER_FEATURE_TEXTURE_NPOT;
|
|
|
|
if (cogl_flags & COGL_FEATURE_TEXTURE_YUV)
|
|
clutter_flags |= CLUTTER_FEATURE_TEXTURE_YUV;
|
|
|
|
if (cogl_flags & COGL_FEATURE_TEXTURE_READ_PIXELS)
|
|
clutter_flags |= CLUTTER_FEATURE_TEXTURE_READ_PIXELS;
|
|
|
|
if (cogl_flags & COGL_FEATURE_SHADERS_GLSL)
|
|
clutter_flags |= CLUTTER_FEATURE_SHADERS_GLSL;
|
|
|
|
if (cogl_flags & COGL_FEATURE_OFFSCREEN)
|
|
clutter_flags |= CLUTTER_FEATURE_OFFSCREEN;
|
|
|
|
return clutter_flags;
|
|
}
|
|
|
|
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 = (_clutter_features_from_cogl (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;
|
|
}
|
|
|