mirror of
https://github.com/brl/mutter.git
synced 2024-12-27 05:12:15 +00:00
49233af465
The dispose function may be called multiple times during destruction so it needs to be resilient against destroying any resources twice. This wasn't the case for the reference to the Cogl context.
375 lines
11 KiB
C
375 lines
11 KiB
C
/* Clutter.
|
|
* An OpenGL based 'interactive canvas' library.
|
|
* Authored By Matthew Allum <mallum@openedhand.com>
|
|
* Copyright (C) 2006-2007 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <fcntl.h>
|
|
|
|
#include <glib/gi18n-lib.h>
|
|
|
|
#include <GL/glx.h>
|
|
#include <GL/glxext.h>
|
|
#include <GL/gl.h>
|
|
|
|
#include "clutter-backend-glx.h"
|
|
#include "clutter-stage-glx.h"
|
|
#include "clutter-glx.h"
|
|
#include "clutter-profile.h"
|
|
|
|
#include "clutter-debug.h"
|
|
#include "clutter-event-translator.h"
|
|
#include "clutter-event.h"
|
|
#include "clutter-main.h"
|
|
#include "clutter-private.h"
|
|
#include "clutter-stage-private.h"
|
|
|
|
#include <cogl/cogl.h>
|
|
|
|
#define clutter_backend_glx_get_type _clutter_backend_glx_get_type
|
|
|
|
G_DEFINE_TYPE (ClutterBackendGLX, clutter_backend_glx, CLUTTER_TYPE_BACKEND_X11);
|
|
|
|
/* singleton object */
|
|
static ClutterBackendGLX *backend_singleton = NULL;
|
|
|
|
static gchar *clutter_vblank = NULL;
|
|
|
|
G_CONST_RETURN gchar*
|
|
_clutter_backend_glx_get_vblank (void)
|
|
{
|
|
if (clutter_vblank && strcmp (clutter_vblank, "0") == 0)
|
|
return "none";
|
|
else
|
|
return clutter_vblank;
|
|
}
|
|
|
|
static gboolean
|
|
clutter_backend_glx_pre_parse (ClutterBackend *backend,
|
|
GError **error)
|
|
{
|
|
ClutterBackendClass *parent_class =
|
|
CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
|
|
const gchar *env_string;
|
|
|
|
env_string = g_getenv ("CLUTTER_VBLANK");
|
|
if (env_string)
|
|
{
|
|
clutter_vblank = g_strdup (env_string);
|
|
env_string = NULL;
|
|
}
|
|
|
|
return parent_class->pre_parse (backend, error);
|
|
}
|
|
|
|
static gboolean
|
|
clutter_backend_glx_post_parse (ClutterBackend *backend,
|
|
GError **error)
|
|
{
|
|
ClutterBackendClass *parent_class =
|
|
CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
|
|
|
|
if (!parent_class->post_parse (backend, error))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static const GOptionEntry entries[] =
|
|
{
|
|
{ "vblank", 0,
|
|
0,
|
|
G_OPTION_ARG_STRING, &clutter_vblank,
|
|
N_("Set to 'none' or '0' to disable throttling "
|
|
"framerate to vblank"), "OPTION"
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static void
|
|
clutter_backend_glx_add_options (ClutterBackend *backend,
|
|
GOptionGroup *group)
|
|
{
|
|
ClutterBackendClass *parent_class =
|
|
CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
|
|
|
|
g_option_group_add_entries (group, entries);
|
|
|
|
parent_class->add_options (backend, group);
|
|
}
|
|
|
|
static void
|
|
clutter_backend_glx_finalize (GObject *gobject)
|
|
{
|
|
if (backend_singleton)
|
|
backend_singleton = NULL;
|
|
|
|
G_OBJECT_CLASS (clutter_backend_glx_parent_class)->finalize (gobject);
|
|
}
|
|
|
|
static void
|
|
clutter_backend_glx_dispose (GObject *gobject)
|
|
{
|
|
ClutterBackend *backend = CLUTTER_BACKEND (gobject);
|
|
|
|
/* Unrealize all shaders, since the GL context is going away */
|
|
/* XXX: Why isn't this done in
|
|
* clutter-backend.c:clutter_backend_dispose ?
|
|
*/
|
|
_clutter_shader_release_all ();
|
|
|
|
/* 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_glx_parent_class)->dispose (gobject);
|
|
|
|
if (backend->cogl_context)
|
|
{
|
|
cogl_object_unref (backend->cogl_context);
|
|
backend->cogl_context = NULL;
|
|
}
|
|
}
|
|
|
|
static GObject *
|
|
clutter_backend_glx_constructor (GType gtype,
|
|
guint n_params,
|
|
GObjectConstructParam *params)
|
|
{
|
|
GObjectClass *parent_class;
|
|
GObject *retval;
|
|
|
|
if (!backend_singleton)
|
|
{
|
|
parent_class = G_OBJECT_CLASS (clutter_backend_glx_parent_class);
|
|
retval = parent_class->constructor (gtype, n_params, params);
|
|
|
|
backend_singleton = CLUTTER_BACKEND_GLX (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_glx_get_features (ClutterBackend *backend)
|
|
{
|
|
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
|
|
ClutterBackendClass *parent_class;
|
|
ClutterFeatureFlags flags;
|
|
|
|
parent_class = CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
|
|
|
|
flags = parent_class->get_features (backend);
|
|
|
|
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_glx->can_blit_sub_buffer = TRUE;
|
|
}
|
|
|
|
CLUTTER_NOTE (BACKEND, "backend features checked");
|
|
|
|
return flags;
|
|
}
|
|
|
|
static XVisualInfo *
|
|
clutter_backend_glx_get_visual_info (ClutterBackendX11 *backend_x11)
|
|
{
|
|
return cogl_clutter_winsys_xlib_get_visual_info ();
|
|
}
|
|
|
|
static gboolean
|
|
clutter_backend_glx_create_context (ClutterBackend *backend,
|
|
GError **error)
|
|
{
|
|
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
CoglSwapChain *swap_chain = NULL;
|
|
CoglOnscreenTemplate *onscreen_template = NULL;
|
|
|
|
if (backend->cogl_context)
|
|
return TRUE;
|
|
|
|
backend->cogl_renderer = cogl_renderer_new ();
|
|
cogl_renderer_xlib_set_foreign_display (backend->cogl_renderer,
|
|
backend_x11->xdpy);
|
|
if (!cogl_renderer_connect (backend->cogl_renderer, error))
|
|
goto error;
|
|
|
|
swap_chain = cogl_swap_chain_new ();
|
|
cogl_swap_chain_set_has_alpha (swap_chain,
|
|
clutter_x11_get_use_argb_visual ());
|
|
|
|
onscreen_template = cogl_onscreen_template_new (swap_chain);
|
|
cogl_object_unref (swap_chain);
|
|
|
|
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);
|
|
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_glx_create_stage (ClutterBackend *backend,
|
|
ClutterStage *wrapper,
|
|
GError **error)
|
|
{
|
|
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
ClutterEventTranslator *translator;
|
|
ClutterStageWindow *stage_window;
|
|
ClutterStageX11 *stage_x11;
|
|
|
|
stage_window = g_object_new (CLUTTER_TYPE_STAGE_GLX, NULL);
|
|
|
|
/* copy backend data into the stage */
|
|
stage_x11 = CLUTTER_STAGE_X11 (stage_window);
|
|
stage_x11->wrapper = wrapper;
|
|
stage_x11->backend = backend_x11;
|
|
|
|
translator = CLUTTER_EVENT_TRANSLATOR (stage_x11);
|
|
_clutter_backend_add_event_translator (backend, translator);
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"GLX stage created[%p] (dpy:%p, screen:%d, root:%u, wrap:%p)",
|
|
stage_window,
|
|
backend_x11->xdpy,
|
|
backend_x11->xscreen_num,
|
|
(unsigned int) backend_x11->xwin_root,
|
|
wrapper);
|
|
|
|
return stage_window;
|
|
}
|
|
|
|
static void
|
|
clutter_backend_glx_ensure_context (ClutterBackend *backend,
|
|
ClutterStage *stage)
|
|
{
|
|
ClutterStageGLX *stage_glx =
|
|
CLUTTER_STAGE_GLX (_clutter_stage_get_window (stage));
|
|
|
|
cogl_set_framebuffer (COGL_FRAMEBUFFER (stage_glx->onscreen));
|
|
}
|
|
|
|
static void
|
|
clutter_backend_glx_class_init (ClutterBackendGLXClass *klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
|
|
ClutterBackendX11Class *backendx11_class = CLUTTER_BACKEND_X11_CLASS (klass);
|
|
|
|
gobject_class->constructor = clutter_backend_glx_constructor;
|
|
gobject_class->dispose = clutter_backend_glx_dispose;
|
|
gobject_class->finalize = clutter_backend_glx_finalize;
|
|
|
|
backend_class->pre_parse = clutter_backend_glx_pre_parse;
|
|
backend_class->post_parse = clutter_backend_glx_post_parse;
|
|
backend_class->create_stage = clutter_backend_glx_create_stage;
|
|
backend_class->add_options = clutter_backend_glx_add_options;
|
|
backend_class->get_features = clutter_backend_glx_get_features;
|
|
backend_class->create_context = clutter_backend_glx_create_context;
|
|
backend_class->ensure_context = clutter_backend_glx_ensure_context;
|
|
|
|
backendx11_class->get_visual_info = clutter_backend_glx_get_visual_info;
|
|
}
|
|
|
|
static void
|
|
clutter_backend_glx_init (ClutterBackendGLX *backend_glx)
|
|
{
|
|
}
|
|
|
|
/* every backend must implement this function */
|
|
GType
|
|
_clutter_backend_impl_get_type (void)
|
|
{
|
|
return _clutter_backend_glx_get_type ();
|
|
}
|