d6f110a4d2
This migrates all the GLX window system code down from the Clutter backend code into a Cogl winsys. Moving OpenGL window system binding code down from Clutter into Cogl is the biggest blocker to having Cogl become a standalone 3D graphics library, so this is an important step in that direction.
372 lines
11 KiB
C
372 lines
11 KiB
C
/* Clutter.
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* An OpenGL based 'interactive canvas' library.
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* Authored By Matthew Allum <mallum@openedhand.com>
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* Copyright (C) 2006-2007 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <sys/types.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <fcntl.h>
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#include <glib/gi18n-lib.h>
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#include <GL/glx.h>
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#include <GL/glxext.h>
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#include <GL/gl.h>
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#include "clutter-backend-glx.h"
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#include "clutter-stage-glx.h"
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#include "clutter-glx.h"
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#include "clutter-profile.h"
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#include "clutter-debug.h"
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#include "clutter-event-translator.h"
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#include "clutter-event.h"
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#include "clutter-main.h"
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#include "clutter-private.h"
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#include "clutter-stage-private.h"
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#include "cogl/cogl.h"
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#include "cogl/cogl-internal.h"
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#define clutter_backend_glx_get_type _clutter_backend_glx_get_type
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G_DEFINE_TYPE (ClutterBackendGLX, clutter_backend_glx, CLUTTER_TYPE_BACKEND_X11);
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/* singleton object */
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static ClutterBackendGLX *backend_singleton = NULL;
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static gchar *clutter_vblank = NULL;
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G_CONST_RETURN gchar*
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_clutter_backend_glx_get_vblank (void)
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{
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if (clutter_vblank && strcmp (clutter_vblank, "0") == 0)
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return "none";
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else
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return clutter_vblank;
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}
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static gboolean
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clutter_backend_glx_pre_parse (ClutterBackend *backend,
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GError **error)
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{
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ClutterBackendClass *parent_class =
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CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
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const gchar *env_string;
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env_string = g_getenv ("CLUTTER_VBLANK");
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if (env_string)
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{
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clutter_vblank = g_strdup (env_string);
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env_string = NULL;
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}
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return parent_class->pre_parse (backend, error);
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}
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static gboolean
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clutter_backend_glx_post_parse (ClutterBackend *backend,
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GError **error)
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{
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ClutterBackendClass *parent_class =
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CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
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if (!parent_class->post_parse (backend, error))
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return FALSE;
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return TRUE;
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}
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static const GOptionEntry entries[] =
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{
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{ "vblank", 0,
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0,
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G_OPTION_ARG_STRING, &clutter_vblank,
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N_("Set to 'none' or '0' to disable throttling "
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"framerate to vblank"), "OPTION"
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},
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{ NULL }
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};
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static void
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clutter_backend_glx_add_options (ClutterBackend *backend,
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GOptionGroup *group)
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{
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ClutterBackendClass *parent_class =
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CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
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g_option_group_add_entries (group, entries);
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parent_class->add_options (backend, group);
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}
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static void
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clutter_backend_glx_finalize (GObject *gobject)
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{
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if (backend_singleton)
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backend_singleton = NULL;
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G_OBJECT_CLASS (clutter_backend_glx_parent_class)->finalize (gobject);
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}
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static void
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clutter_backend_glx_dispose (GObject *gobject)
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{
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ClutterBackend *backend = CLUTTER_BACKEND (gobject);
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/* Unrealize all shaders, since the GL context is going away */
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/* XXX: Why isn't this done in
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* clutter-backend.c:clutter_backend_dispose ?
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*/
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_clutter_shader_release_all ();
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/* We chain up before disposing our CoglContext so that we will
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* destroy all of the stages first. Otherwise the actors may try to
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* make Cogl calls during destruction which would cause a crash */
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G_OBJECT_CLASS (clutter_backend_glx_parent_class)->dispose (gobject);
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cogl_object_unref (backend->cogl_context);
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}
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static GObject *
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clutter_backend_glx_constructor (GType gtype,
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guint n_params,
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GObjectConstructParam *params)
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{
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GObjectClass *parent_class;
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GObject *retval;
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if (!backend_singleton)
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{
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parent_class = G_OBJECT_CLASS (clutter_backend_glx_parent_class);
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retval = parent_class->constructor (gtype, n_params, params);
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backend_singleton = CLUTTER_BACKEND_GLX (retval);
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return retval;
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}
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g_warning ("Attempting to create a new backend object. This should "
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"never happen, so we return the singleton instance.");
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return g_object_ref (backend_singleton);
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}
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static ClutterFeatureFlags
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clutter_backend_glx_get_features (ClutterBackend *backend)
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{
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ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
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ClutterBackendClass *parent_class;
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ClutterFeatureFlags flags;
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parent_class = CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
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flags = parent_class->get_features (backend);
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if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_MULTIPLE_ONSCREEN))
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{
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CLUTTER_NOTE (BACKEND, "Cogl supports multiple onscreen framebuffers");
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flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
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}
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else
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{
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CLUTTER_NOTE (BACKEND, "Cogl only supports one onscreen framebuffer");
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flags |= CLUTTER_FEATURE_STAGE_STATIC;
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}
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if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_THROTTLE))
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{
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CLUTTER_NOTE (BACKEND, "Cogl supports swap buffers throttling");
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flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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}
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else
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CLUTTER_NOTE (BACKEND, "Cogl doesn't support swap buffers throttling");
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if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_BUFFERS_EVENT))
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{
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CLUTTER_NOTE (BACKEND, "Cogl supports swap buffers complete events");
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flags |= CLUTTER_FEATURE_SWAP_EVENTS;
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}
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if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_REGION))
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{
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CLUTTER_NOTE (BACKEND, "Cogl supports swapping buffer regions");
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backend_glx->can_blit_sub_buffer = TRUE;
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}
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CLUTTER_NOTE (BACKEND, "backend features checked");
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return flags;
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}
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static XVisualInfo *
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clutter_backend_glx_get_visual_info (ClutterBackendX11 *backend_x11)
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{
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return cogl_clutter_winsys_xlib_get_visual_info ();
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}
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static gboolean
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clutter_backend_glx_create_context (ClutterBackend *backend,
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GError **error)
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{
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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
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CoglSwapChain *swap_chain = NULL;
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CoglOnscreenTemplate *onscreen_template = NULL;
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if (backend->cogl_context)
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return TRUE;
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backend->cogl_renderer = cogl_renderer_new ();
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cogl_renderer_xlib_set_foreign_display (backend->cogl_renderer,
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backend_x11->xdpy);
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if (!cogl_renderer_connect (backend->cogl_renderer, error))
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goto error;
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swap_chain = cogl_swap_chain_new ();
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cogl_swap_chain_set_has_alpha (swap_chain,
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clutter_x11_get_use_argb_visual ());
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onscreen_template = cogl_onscreen_template_new (swap_chain);
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cogl_object_unref (swap_chain);
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if (!cogl_renderer_check_onscreen_template (backend->cogl_renderer,
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onscreen_template,
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error))
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goto error;
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backend->cogl_display = cogl_display_new (backend->cogl_renderer,
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onscreen_template);
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cogl_object_unref (backend->cogl_renderer);
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cogl_object_unref (onscreen_template);
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if (!cogl_display_setup (backend->cogl_display, error))
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goto error;
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backend->cogl_context = cogl_context_new (backend->cogl_display, error);
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if (!backend->cogl_context)
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goto error;
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/* XXX: eventually this should go away but a lot of Cogl code still
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* depends on a global default context. */
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cogl_set_default_context (backend->cogl_context);
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return TRUE;
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error:
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if (backend->cogl_display)
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{
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cogl_object_unref (backend->cogl_display);
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backend->cogl_display = NULL;
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}
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if (onscreen_template)
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cogl_object_unref (onscreen_template);
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if (swap_chain)
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cogl_object_unref (swap_chain);
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if (backend->cogl_renderer)
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{
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cogl_object_unref (backend->cogl_renderer);
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backend->cogl_renderer = NULL;
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}
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return FALSE;
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}
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static ClutterStageWindow *
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clutter_backend_glx_create_stage (ClutterBackend *backend,
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ClutterStage *wrapper,
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GError **error)
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{
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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
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ClutterEventTranslator *translator;
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ClutterStageWindow *stage_window;
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ClutterStageX11 *stage_x11;
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stage_window = g_object_new (CLUTTER_TYPE_STAGE_GLX, NULL);
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/* copy backend data into the stage */
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stage_x11 = CLUTTER_STAGE_X11 (stage_window);
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stage_x11->wrapper = wrapper;
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stage_x11->backend = backend_x11;
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translator = CLUTTER_EVENT_TRANSLATOR (stage_x11);
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_clutter_backend_add_event_translator (backend, translator);
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CLUTTER_NOTE (BACKEND,
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"GLX stage created[%p] (dpy:%p, screen:%d, root:%u, wrap:%p)",
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stage_window,
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backend_x11->xdpy,
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backend_x11->xscreen_num,
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(unsigned int) backend_x11->xwin_root,
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wrapper);
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return stage_window;
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}
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static void
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clutter_backend_glx_ensure_context (ClutterBackend *backend,
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ClutterStage *stage)
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{
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ClutterStageGLX *stage_glx =
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CLUTTER_STAGE_GLX (_clutter_stage_get_window (stage));
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cogl_set_framebuffer (COGL_FRAMEBUFFER (stage_glx->onscreen));
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}
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static void
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clutter_backend_glx_class_init (ClutterBackendGLXClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
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ClutterBackendX11Class *backendx11_class = CLUTTER_BACKEND_X11_CLASS (klass);
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gobject_class->constructor = clutter_backend_glx_constructor;
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gobject_class->dispose = clutter_backend_glx_dispose;
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gobject_class->finalize = clutter_backend_glx_finalize;
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backend_class->pre_parse = clutter_backend_glx_pre_parse;
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backend_class->post_parse = clutter_backend_glx_post_parse;
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backend_class->create_stage = clutter_backend_glx_create_stage;
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backend_class->add_options = clutter_backend_glx_add_options;
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backend_class->get_features = clutter_backend_glx_get_features;
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backend_class->create_context = clutter_backend_glx_create_context;
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backend_class->ensure_context = clutter_backend_glx_ensure_context;
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backendx11_class->get_visual_info = clutter_backend_glx_get_visual_info;
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}
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static void
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clutter_backend_glx_init (ClutterBackendGLX *backend_glx)
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{
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}
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/* every backend must implement this function */
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GType
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_clutter_backend_impl_get_type (void)
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{
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return _clutter_backend_glx_get_type ();
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}
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