c0d5af5de5
A new (internal only currently) API, _clutter_actor_queue_clipped_redraw
can be used to queue a redraw along with a clip rectangle in actor
coordinates. This clip rectangle propagates up to the stage and clutter
backend which may optionally use the information to optimize stage
redraws. The GLX backend in particular may scissor the next redraw to
the clip rectangle and use GLX_MESA_copy_sub_buffer to present the stage
subregion.
The intention is that any actors that can naturally determine the bounds
of updates should queue clipped redraws to reduce the cost of updating
small regions of the screen.
Notes:
» If GLX_MESA_copy_sub_buffer isn't available then the GLX backend
ignores any clip rectangles.
» queuing multiple clipped redraws will result in the bounding box of
each clip rectangle being used.
» If a clipped redraw has a height > 300 pixels then it's promoted into
a full stage redraw, so that the GPU doesn't end up blocking too long
waiting for the vsync to reach the optimal position to avoid tearing.
» Note: no empirical data was used to come up with this threshold so
we may need to tune this.
» Currently only ClutterX11TexturePixmap makes use of this new API. This
is done via a new "queue-damage-redraw" signal that is emitted when
the pixmap is updated. The default handler queues a clipped redraw
with the assumption that the pixmap is being painted as a rectangle
covering the actors transformed allocation. If you subclass
ClutterX11TexturePixmap and change how it's painted you now also
need to override the signal handler and queue your own redraw.
Technically this is a semantic break, but it's assumed that no one
is currently doing this.
This still leaves a few unsolved issues with regards to optimizing sub
stage redraws that need to be addressed in further work so this can only
be considered a stepping stone a this point:
» Because we have no reliable way to determine if the painting of any
given actor is being modified any optimizations implemented using
_clutter_actor_queue_redraw_with_clip must be overridable by a
subclass, and technically must be opt-in for existing classes to avoid
a change in semantics. E.g. consider that a user connects to the paint
signal for ClutterTexture and paints a circle instead of a rectangle.
In this case any original logic to queue clipped redraws would be
incorrect.
» Currently only the implementation of an actor has enough information
with which to queue clipped redraws. E.g. It is not possible for
generic code in clutter-actor.c to queue a clipped redraw when hiding
an actor because actors have no way to report a "paint box". (remember
actors can draw outside their allocation and actors with depth may
also be projected outside of their allocation)
» The current plan is to add a actor_class->get_paint_cuboid()
virtual so actors can report a bounding cube for everything they
would draw in their current state and use that to queue clipped
redraws against the stage by projecting the paint cube into stage
coordinates.
» Our heuristics for promoting clipped redraws into full redraws to
avoid blocking the GPU while we wait for the vsync need improving:
» vsync issues aren't relevant for redirected/composited applications
so they should use different heuristics. In this case we instead
need to trade off the cost of blitting when using glXCopySubBuffer
vs promoting to a full redraw and flipping instead.
790 lines
24 KiB
C
790 lines
24 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-event-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-event.h"
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#include "../clutter-main.h"
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#include "../clutter-debug.h"
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#include "../clutter-private.h"
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#include "../clutter-version.h"
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#include "cogl/cogl.h"
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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_name = NULL;
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G_CONST_RETURN gchar*
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clutter_backend_glx_get_vblank_method (void)
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{
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return clutter_vblank_name;
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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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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_name = g_strdup (env_string);
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env_string = NULL;
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}
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return clutter_backend_x11_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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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
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ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
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ClutterBackendClass *backend_class =
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CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
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int glx_major, glx_minor;
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if (!backend_class->post_parse (backend, error))
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return FALSE;
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if (!glXQueryExtension (backend_x11->xdpy,
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&backend_glx->error_base,
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&backend_glx->event_base))
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"XServer appears to lack required GLX support");
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return FALSE;
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}
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/* XXX: Technically we should require >= GLX 1.3 support but for a long
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* time Mesa has exported a hybrid GLX, exporting extensions specified
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* to require GLX 1.3, but still reporting 1.2 via glXQueryVersion. */
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if (!glXQueryVersion (backend_x11->xdpy, &glx_major, &glx_minor)
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|| !(glx_major == 1 && glx_minor >= 2))
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"XServer appears to lack required GLX 1.2 support");
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return FALSE;
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}
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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_name,
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N_("VBlank method to be used (none, dri or glx)"), "METHOD"
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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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g_option_group_add_entries (group, entries);
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clutter_backend_x11_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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ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (gobject);
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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (gobject);
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/* Unrealize all shaders, since the GL context is going away */
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_clutter_shader_release_all ();
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if (backend_glx->gl_context)
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{
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glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
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glXDestroyContext (backend_x11->xdpy, backend_glx->gl_context);
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backend_glx->gl_context = None;
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}
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if (backend_glx->dummy_glxwin)
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{
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glXDestroyWindow (backend_x11->xdpy, backend_glx->dummy_glxwin);
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backend_glx->dummy_glxwin = None;
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}
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if (backend_glx->dummy_xwin)
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{
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XDestroyWindow (backend_x11->xdpy, backend_glx->dummy_xwin);
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backend_glx->dummy_xwin = None;
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}
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G_OBJECT_CLASS (clutter_backend_glx_parent_class)->dispose (gobject);
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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 gboolean
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check_vblank_env (const char *name)
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{
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if (clutter_vblank_name && !g_ascii_strcasecmp (clutter_vblank_name, name))
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return TRUE;
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return FALSE;
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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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const gchar *glx_extensions = NULL;
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ClutterFeatureFlags flags;
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gboolean use_dri = FALSE;
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flags = clutter_backend_x11_get_features (backend);
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flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
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/* this will make sure that the GL context exists */
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g_assert (backend_glx->gl_context != None);
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g_assert (glXGetCurrentDrawable () != None);
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CLUTTER_NOTE (BACKEND,
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"Checking features\n"
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" GL_VENDOR: %s\n"
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" GL_RENDERER: %s\n"
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" GL_VERSION: %s\n"
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" GL_EXTENSIONS: %s",
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glGetString (GL_VENDOR),
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glGetString (GL_RENDERER),
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glGetString (GL_VERSION),
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glGetString (GL_EXTENSIONS));
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glx_extensions =
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glXQueryExtensionsString (clutter_x11_get_default_display (),
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clutter_x11_get_default_screen ());
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CLUTTER_NOTE (BACKEND, " GLX Extensions: %s", glx_extensions);
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use_dri = check_vblank_env ("dri");
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/* First check for explicit disabling or it set elsewhere (eg NVIDIA) */
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if (check_vblank_env ("none"))
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{
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CLUTTER_NOTE (BACKEND, "vblank sync: disabled at user request");
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goto vblank_setup_done;
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}
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if (g_getenv ("__GL_SYNC_TO_VBLANK") != NULL)
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{
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backend_glx->vblank_type = CLUTTER_VBLANK_GLX_SWAP;
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flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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CLUTTER_NOTE (BACKEND, "Using __GL_SYNC_TO_VBLANK hint");
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goto vblank_setup_done;
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}
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/* We try two GL vblank syncing mechanisms.
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* glXSwapIntervalSGI is tried first, then glXGetVideoSyncSGI.
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*
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* glXSwapIntervalSGI is known to work with Mesa and in particular
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* the Intel drivers. glXGetVideoSyncSGI has serious problems with
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* Intel drivers causing terrible frame rate so it only tried as a
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* fallback.
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*
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* How well glXGetVideoSyncSGI works with other driver (ATI etc) needs
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* to be investigated. glXGetVideoSyncSGI on ATI at least seems to have
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* no effect.
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*/
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if (!use_dri &&
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_cogl_check_extension ("GLX_SGI_swap_control", glx_extensions))
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{
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backend_glx->swap_interval =
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(SwapIntervalProc) cogl_get_proc_address ("glXSwapIntervalSGI");
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CLUTTER_NOTE (BACKEND, "attempting glXSwapIntervalSGI vblank setup");
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if (backend_glx->swap_interval != NULL &&
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backend_glx->swap_interval (1) == 0)
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{
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backend_glx->vblank_type = CLUTTER_VBLANK_GLX_SWAP;
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flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI setup success");
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#ifdef GLX_INTEL_swap_event
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/* GLX_INTEL_swap_event allows us to avoid blocking the CPU
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* while we wait for glXSwapBuffers to complete, and instead
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* we get an X event notifying us of completion...
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*/
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if (!(clutter_paint_debug_flags & CLUTTER_DEBUG_DISABLE_SWAP_EVENTS) &&
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_cogl_check_extension ("GLX_INTEL_swap_event", glx_extensions))
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{
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flags |= CLUTTER_FEATURE_SWAP_EVENTS;
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}
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#endif /* GLX_INTEL_swap_event */
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goto vblank_setup_done;
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}
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CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI vblank setup failed");
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}
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if (!use_dri &&
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!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK) &&
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_cogl_check_extension ("GLX_SGI_video_sync", glx_extensions))
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{
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CLUTTER_NOTE (BACKEND, "attempting glXGetVideoSyncSGI vblank setup");
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backend_glx->get_video_sync =
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(GetVideoSyncProc) cogl_get_proc_address ("glXGetVideoSyncSGI");
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backend_glx->wait_video_sync =
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(WaitVideoSyncProc) cogl_get_proc_address ("glXWaitVideoSyncSGI");
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if ((backend_glx->get_video_sync != NULL) &&
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(backend_glx->wait_video_sync != NULL))
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{
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CLUTTER_NOTE (BACKEND, "glXGetVideoSyncSGI vblank setup success");
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backend_glx->vblank_type = CLUTTER_VBLANK_GLX;
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flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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goto vblank_setup_done;
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}
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CLUTTER_NOTE (BACKEND, "glXGetVideoSyncSGI vblank setup failed");
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}
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#ifdef __linux__
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/*
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* DRI is really an extreme fallback -rumoured to work with Via chipsets
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*/
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if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
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{
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CLUTTER_NOTE (BACKEND, "attempting DRI vblank setup");
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backend_glx->dri_fd = open("/dev/dri/card0", O_RDWR);
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if (backend_glx->dri_fd >= 0)
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{
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CLUTTER_NOTE (BACKEND, "DRI vblank setup success");
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backend_glx->vblank_type = CLUTTER_VBLANK_DRI;
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flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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goto vblank_setup_done;
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}
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CLUTTER_NOTE (BACKEND, "DRI vblank setup failed");
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}
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#endif /* __linux__ */
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CLUTTER_NOTE (BACKEND, "no use-able vblank mechanism found");
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vblank_setup_done:
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if (_cogl_check_extension ("GLX_MESA_copy_sub_buffer", glx_extensions))
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{
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backend_glx->copy_sub_buffer =
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(CopySubBufferProc) cogl_get_proc_address ("glXCopySubBufferMESA");
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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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/* It seems the GLX spec never defined an invalid GLXFBConfig that
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* we could overload as an indication of error, so we have to return
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* an explicit boolean status. */
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gboolean
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_clutter_backend_glx_get_fbconfig (ClutterBackendGLX *backend_glx,
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GLXFBConfig *config)
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{
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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend_glx);
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GLXFBConfig *configs = NULL;
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gboolean use_argb = clutter_x11_get_use_argb_visual ();
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int n_configs, i;
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static const int attributes[] = {
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GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
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GLX_RENDER_TYPE, GLX_RGBA_BIT,
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GLX_DOUBLEBUFFER, GL_TRUE,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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|
GLX_BLUE_SIZE, 1,
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GLX_ALPHA_SIZE, 1,
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GLX_DEPTH_SIZE, 1,
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GLX_STENCIL_SIZE, 1,
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None
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};
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|
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if (backend_x11->xdpy == None || backend_x11->xscreen == None)
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return FALSE;
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|
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/* If we don't already have a cached config then try to get one */
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if (!backend_glx->found_fbconfig)
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{
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CLUTTER_NOTE (BACKEND,
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"Retrieving GL fbconfig, dpy: %p, xscreen; %p (%d)",
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backend_x11->xdpy,
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backend_x11->xscreen,
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backend_x11->xscreen_num);
|
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|
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configs = glXChooseFBConfig (backend_x11->xdpy,
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backend_x11->xscreen_num,
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attributes,
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&n_configs);
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if (configs)
|
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{
|
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if (use_argb)
|
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{
|
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for (i = 0; i < n_configs; i++)
|
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{
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XVisualInfo *vinfo;
|
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|
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vinfo = glXGetVisualFromFBConfig (backend_x11->xdpy,
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configs[i]);
|
|
if (vinfo == None)
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continue;
|
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|
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if (vinfo->depth == 32 &&
|
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(vinfo->red_mask == 0xff0000 &&
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vinfo->green_mask == 0x00ff00 &&
|
|
vinfo->blue_mask == 0x0000ff))
|
|
{
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|
CLUTTER_NOTE (BACKEND,
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|
"Found GLX visual ARGB [index:%d]", i);
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|
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backend_glx->found_fbconfig = TRUE;
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|
backend_glx->fbconfig = configs[i];
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|
|
goto out;
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|
}
|
|
}
|
|
|
|
/* If we make it here then we didn't find an RGBA config so
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we'll fall back to using an RGB config */
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|
CLUTTER_NOTE (BACKEND, "ARGB visual requested, but none found");
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|
}
|
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|
|
if (n_configs >= 1)
|
|
{
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|
backend_glx->found_fbconfig = TRUE;
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|
backend_glx->fbconfig = configs[0];
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|
}
|
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|
|
out:
|
|
XFree (configs);
|
|
}
|
|
}
|
|
|
|
if (backend_glx->found_fbconfig)
|
|
{
|
|
*config = backend_glx->fbconfig;
|
|
|
|
return TRUE;
|
|
}
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
static XVisualInfo *
|
|
clutter_backend_glx_get_visual_info (ClutterBackendX11 *backend_x11)
|
|
{
|
|
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend_x11);
|
|
GLXFBConfig config;
|
|
|
|
if (!_clutter_backend_glx_get_fbconfig (backend_glx, &config))
|
|
return NULL;
|
|
|
|
return glXGetVisualFromFBConfig (backend_x11->xdpy, config);
|
|
}
|
|
|
|
static gboolean
|
|
clutter_backend_glx_create_context (ClutterBackend *backend,
|
|
GError **error)
|
|
{
|
|
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
|
|
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
GLXFBConfig config;
|
|
gboolean is_direct;
|
|
Window root_xwin;
|
|
XSetWindowAttributes attrs;
|
|
XVisualInfo *xvisinfo;
|
|
Display *xdisplay;
|
|
int major;
|
|
int minor;
|
|
GLXDrawable dummy_drawable;
|
|
|
|
if (backend_glx->gl_context != None)
|
|
return TRUE;
|
|
|
|
xdisplay = clutter_x11_get_default_display ();
|
|
root_xwin = clutter_x11_get_root_window ();
|
|
|
|
if (!_clutter_backend_glx_get_fbconfig (backend_glx, &config))
|
|
{
|
|
g_set_error (error, CLUTTER_INIT_ERROR,
|
|
CLUTTER_INIT_ERROR_BACKEND,
|
|
"Unable to find suitable fbconfig for the GLX context");
|
|
return FALSE;
|
|
}
|
|
|
|
CLUTTER_NOTE (BACKEND, "Creating GLX Context (display: %p)", xdisplay);
|
|
|
|
backend_glx->gl_context = glXCreateNewContext (xdisplay,
|
|
config,
|
|
GLX_RGBA_TYPE,
|
|
NULL,
|
|
True);
|
|
if (backend_glx->gl_context == None)
|
|
{
|
|
g_set_error (error, CLUTTER_INIT_ERROR,
|
|
CLUTTER_INIT_ERROR_BACKEND,
|
|
"Unable to create suitable GL context");
|
|
return FALSE;
|
|
}
|
|
|
|
is_direct = glXIsDirect (xdisplay, backend_glx->gl_context);
|
|
|
|
CLUTTER_NOTE (GL, "Setting %s context",
|
|
is_direct ? "direct"
|
|
: "indirect");
|
|
_cogl_set_indirect_context (!is_direct);
|
|
|
|
/* COGL assumes that there is always a GL context selected; in order
|
|
* to make sure that a GLX context exists and is made current, we use
|
|
* a dummy, offscreen override-redirect window to which we can always
|
|
* fall back if no stage is available
|
|
*
|
|
* XXX - we need to do this dance because GLX does not allow creating
|
|
* a context and querying it for basic information (even the function
|
|
* pointers) unless it's made current to a real Drawable. it should be
|
|
* possible to avoid this in future releases of Mesa and X11, but right
|
|
* now this is the best solution available.
|
|
*/
|
|
xvisinfo = glXGetVisualFromFBConfig (xdisplay, config);
|
|
if (xvisinfo == None)
|
|
{
|
|
g_set_error (error, CLUTTER_INIT_ERROR,
|
|
CLUTTER_INIT_ERROR_BACKEND,
|
|
"Unable to retrieve the X11 visual");
|
|
return FALSE;
|
|
}
|
|
|
|
clutter_x11_trap_x_errors ();
|
|
|
|
attrs.override_redirect = True;
|
|
attrs.colormap = XCreateColormap (xdisplay,
|
|
root_xwin,
|
|
xvisinfo->visual,
|
|
AllocNone);
|
|
|
|
backend_glx->dummy_xwin = XCreateWindow (xdisplay, root_xwin,
|
|
-100, -100, 1, 1,
|
|
0,
|
|
xvisinfo->depth,
|
|
CopyFromParent,
|
|
xvisinfo->visual,
|
|
CWOverrideRedirect | CWColormap,
|
|
&attrs);
|
|
|
|
/* Try and create a GLXWindow to use with extensions dependent on
|
|
* GLX versions >= 1.3 that don't accept regular X Windows as GLX
|
|
* drawables. */
|
|
if (glXQueryVersion (backend_x11->xdpy, &major, &minor) &&
|
|
major == 1 && minor >= 3)
|
|
{
|
|
backend_glx->dummy_glxwin = glXCreateWindow (backend_x11->xdpy,
|
|
config,
|
|
backend_glx->dummy_xwin,
|
|
NULL);
|
|
}
|
|
|
|
if (backend_glx->dummy_glxwin)
|
|
dummy_drawable = backend_glx->dummy_glxwin;
|
|
else
|
|
dummy_drawable = backend_glx->dummy_xwin;
|
|
|
|
CLUTTER_NOTE (BACKEND, "Selecting dummy 0x%x for the GLX context",
|
|
(unsigned int) dummy_drawable);
|
|
|
|
glXMakeContextCurrent (xdisplay,
|
|
dummy_drawable,
|
|
dummy_drawable,
|
|
backend_glx->gl_context);
|
|
|
|
XFree (xvisinfo);
|
|
|
|
if (clutter_x11_untrap_x_errors ())
|
|
{
|
|
g_set_error (error, CLUTTER_INIT_ERROR,
|
|
CLUTTER_INIT_ERROR_BACKEND,
|
|
"Unable to select the newly created GLX context");
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* TODO: remove this interface in favour of
|
|
* _clutter_stage_window_make_current () */
|
|
static void
|
|
clutter_backend_glx_ensure_context (ClutterBackend *backend,
|
|
ClutterStage *stage)
|
|
{
|
|
ClutterStageWindow *impl;
|
|
|
|
/* if there is no stage, the stage is being destroyed or it has no
|
|
* implementation attached to it then we clear the GL context
|
|
*/
|
|
if (stage == NULL ||
|
|
(CLUTTER_PRIVATE_FLAGS (stage) & CLUTTER_ACTOR_IN_DESTRUCTION) ||
|
|
((impl = _clutter_stage_get_window (stage)) == NULL))
|
|
{
|
|
ClutterBackendX11 *backend_x11;
|
|
|
|
backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
CLUTTER_NOTE (MULTISTAGE, "Clearing all context");
|
|
|
|
glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
|
|
}
|
|
else
|
|
{
|
|
ClutterBackendGLX *backend_glx;
|
|
ClutterBackendX11 *backend_x11;
|
|
ClutterStageGLX *stage_glx;
|
|
ClutterStageX11 *stage_x11;
|
|
GLXDrawable drawable;
|
|
|
|
g_assert (impl != NULL);
|
|
|
|
stage_glx = CLUTTER_STAGE_GLX (impl);
|
|
stage_x11 = CLUTTER_STAGE_X11 (impl);
|
|
backend_glx = CLUTTER_BACKEND_GLX (backend);
|
|
backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
|
|
drawable = stage_glx->glxwin ? stage_glx->glxwin : stage_x11->xwin;
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"Setting context for stage of type %s, window: 0x%x",
|
|
G_OBJECT_TYPE_NAME (impl),
|
|
(unsigned int) drawable);
|
|
|
|
/* no GL context to set */
|
|
if (backend_glx->gl_context == None)
|
|
return;
|
|
|
|
clutter_x11_trap_x_errors ();
|
|
|
|
/* we might get here inside the final dispose cycle, so we
|
|
* need to handle this gracefully
|
|
*/
|
|
if (drawable == None)
|
|
{
|
|
GLXDrawable dummy_drawable;
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"Received a stale stage, clearing all context");
|
|
|
|
if (backend_glx->dummy_glxwin)
|
|
dummy_drawable = backend_glx->dummy_glxwin;
|
|
else
|
|
dummy_drawable = backend_glx->dummy_xwin;
|
|
|
|
if (dummy_drawable == None)
|
|
glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
|
|
else
|
|
{
|
|
glXMakeContextCurrent (backend_x11->xdpy,
|
|
dummy_drawable,
|
|
dummy_drawable,
|
|
backend_glx->gl_context);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
CLUTTER_NOTE (BACKEND,
|
|
"MakeContextCurrent dpy: %p, window: 0x%x (%s), context: %p",
|
|
backend_x11->xdpy,
|
|
(unsigned int) drawable,
|
|
stage_x11->is_foreign_xwin ? "foreign" : "native",
|
|
backend_glx->gl_context);
|
|
|
|
glXMakeContextCurrent (backend_x11->xdpy,
|
|
drawable,
|
|
drawable,
|
|
backend_glx->gl_context);
|
|
}
|
|
|
|
if (clutter_x11_untrap_x_errors ())
|
|
g_critical ("Unable to make the stage window 0x%x the current "
|
|
"GLX drawable",
|
|
(unsigned int) drawable);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* FIXME: we should remove backend_class->redraw() and just
|
|
* have stage_window_iface->redraw()
|
|
*/
|
|
static void
|
|
clutter_backend_glx_redraw (ClutterBackend *backend,
|
|
ClutterStage *stage)
|
|
{
|
|
ClutterStageWindow *impl = _clutter_stage_get_window (stage);
|
|
|
|
if (G_UNLIKELY (impl == NULL))
|
|
{
|
|
CLUTTER_NOTE (BACKEND, "Stage [%p] has no implementation", stage);
|
|
return;
|
|
}
|
|
|
|
g_assert (CLUTTER_IS_STAGE_GLX (impl));
|
|
|
|
clutter_stage_glx_redraw (CLUTTER_STAGE_GLX (impl),
|
|
stage);
|
|
}
|
|
|
|
static ClutterStageWindow *
|
|
clutter_backend_glx_create_stage (ClutterBackend *backend,
|
|
ClutterStage *wrapper,
|
|
GError **error)
|
|
{
|
|
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
ClutterStageWindow *stage_window;
|
|
ClutterStageX11 *stage_x11;
|
|
|
|
CLUTTER_NOTE (BACKEND, "Creating stage of type '%s'",
|
|
g_type_name (CLUTTER_STAGE_TYPE));
|
|
|
|
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;
|
|
|
|
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_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->redraw = clutter_backend_glx_redraw;
|
|
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;
|
|
backendx11_class->handle_event = clutter_backend_glx_handle_event;
|
|
}
|
|
|
|
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 ();
|
|
}
|