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mutter/clutter/glx/clutter-stage-glx.c
Havoc Pennington 125bded814 Enforce invariants on mapped, realized, visibility states 
Bug 1138 - No trackable "mapped" state

* Add a VISIBLE flag tracking application programmer's
  expected showing-state for the actor, allowing us to
  always ensure we keep what the app wants while tracking
  internal implementation state separately.

* Make MAPPED reflect whether the actor will be painted;
  add notification on a ClutterActor::mapped property.
  Keep MAPPED state updated as the actor is shown,
  ancestors are shown, actor is reparented, etc.

* Require a stage and realized parents to realize; this means
  at realization time the correct window system and GL resources
  are known. But unparented actors can no longer be realized.

* Allow children to be unrealized even if parent is realized.
  Otherwise in effect either all actors or no actors are realized,
  i.e. it becomes a stage-global flag.

* Allow clutter_actor_realize() to "fail" if not inside a toplevel

* Rework clutter_actor_unrealize() so internally we have
  a flavor that does not mess with visibility flag

* Add _clutter_actor_rerealize() to encapsulate a somewhat
  tricky operation we were doing in a couple of places

* Do not realize/unrealize children in ClutterGroup,
  ClutterActor already does it

* Do not realize impl by hand in clutter_stage_show(),
  since showing impl already does that

* Do not unrealize in various dispose() methods, since
  ClutterActor dispose implementation already does it
  and chaining up is mandatory

* ClutterTexture uses COGL while unrealizable (before it's
  added to a stage). Previously this breakage was affecting
  ClutterActor because we had to allow realize outside
  a stage. Move the breakage to ClutterTexture, by making
  ClutterTexture just use COGL while not realized.

* Unrealize before we set parent to NULL in clutter_actor_unparent().
  This means unrealize() implementations can get to the stage.
  Because actors need the stage in order to detach from stage.

* Update clutter-actor-invariants.txt to reflect latest changes

* Remove explicit hide/unrealize from ClutterActor::dispose since
  unparent already forces those
  Instead just assert that unparent() occurred and did the right thing.

* Check whether parent implements unrealize before chaining up
  Needed because ClutterGroup no longer has to implement unrealize.

* Perform unrealize in the default handler for the signal.
  This allows non-containers that have children to work properly,
  and allows containers to override how it's done.

* Add map/unmap virtual methods and set MAPPED flag on self and
  children in there. This allows subclasses to hook map/unmap.
  These are not signals, because notify::mapped is better for
  anything it's legitimate for a non-subclass to do.

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
2009-04-24 15:27:19 +01:00

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/* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-backend-glx.h"
#include "clutter-stage-glx.h"
#include "clutter-glx.h"
#include "../clutter-main.h"
#include "../clutter-feature.h"
#include "../clutter-color.h"
#include "../clutter-util.h"
#include "../clutter-event.h"
#include "../clutter-enum-types.h"
#include "../clutter-private.h"
#include "../clutter-debug.h"
#include "../clutter-units.h"
#include "../clutter-shader.h"
#include "../clutter-group.h"
#include "../clutter-container.h"
#include "../clutter-stage.h"
#include "../clutter-stage-window.h"
#include "cogl/cogl.h"
#include <GL/glx.h>
#include <GL/gl.h>
static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
G_DEFINE_TYPE_WITH_CODE (ClutterStageGLX,
clutter_stage_glx,
CLUTTER_TYPE_STAGE_X11,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_STAGE_WINDOW,
clutter_stage_window_iface_init));
static void
clutter_stage_glx_unrealize (ClutterActor *actor)
{
ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (actor);
ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (actor);
gboolean was_offscreen;
/* Note unrealize should free up any backend stage related resources */
CLUTTER_NOTE (BACKEND, "Unrealizing stage");
g_object_get (stage_x11->wrapper, "offscreen", &was_offscreen, NULL);
if (CLUTTER_ACTOR_CLASS (clutter_stage_glx_parent_class)->unrealize != NULL)
CLUTTER_ACTOR_CLASS (clutter_stage_glx_parent_class)->unrealize (actor);
clutter_x11_trap_x_errors ();
if (G_UNLIKELY (was_offscreen))
{
if (stage_glx->glxpixmap)
{
glXDestroyGLXPixmap (stage_x11->xdpy,stage_glx->glxpixmap);
stage_glx->glxpixmap = None;
}
if (stage_x11->xpixmap)
{
XFreePixmap (stage_x11->xdpy, stage_x11->xpixmap);
stage_x11->xpixmap = None;
}
}
else
{
if (!stage_x11->is_foreign_xwin && stage_x11->xwin != None)
{
XDestroyWindow (stage_x11->xdpy, stage_x11->xwin);
stage_x11->xwin = None;
}
else
stage_x11->xwin = None;
}
XSync (stage_x11->xdpy, False);
clutter_x11_untrap_x_errors ();
CLUTTER_MARK ();
}
static void
clutter_stage_glx_realize (ClutterActor *actor)
{
ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (actor);
ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (actor);
ClutterBackendGLX *backend_glx;
ClutterBackendX11 *backend_x11;
gboolean is_offscreen;
CLUTTER_NOTE (MISC, "Realizing main stage");
g_object_get (stage_x11->wrapper, "offscreen", &is_offscreen, NULL);
backend_glx = CLUTTER_BACKEND_GLX (clutter_get_default_backend ());
backend_x11 = CLUTTER_BACKEND_X11 (clutter_get_default_backend ());
if (G_LIKELY (!is_offscreen))
{
int gl_attributes[] =
{
GLX_RGBA,
GLX_DOUBLEBUFFER,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_STENCIL_SIZE, 1,
0
};
if (stage_x11->xvisinfo)
{
XFree (stage_x11->xvisinfo);
stage_x11->xvisinfo = None;
}
/* The following check seems strange */
if (stage_x11->xvisinfo == None)
stage_x11->xvisinfo = glXChooseVisual (stage_x11->xdpy,
stage_x11->xscreen,
gl_attributes);
if (!stage_x11->xvisinfo)
{
g_critical ("Unable to find suitable GL visual.");
goto fail;
}
if (stage_x11->xwin == None)
{
XSetWindowAttributes xattr;
unsigned long mask;
CLUTTER_NOTE (MISC, "Creating stage X window");
/* window attributes */
xattr.background_pixel = WhitePixel (stage_x11->xdpy,
stage_x11->xscreen);
xattr.border_pixel = 0;
xattr.colormap = XCreateColormap (stage_x11->xdpy,
stage_x11->xwin_root,
stage_x11->xvisinfo->visual,
AllocNone);
mask = CWBorderPixel | CWColormap;
stage_x11->xwin = XCreateWindow (stage_x11->xdpy,
stage_x11->xwin_root,
0, 0,
stage_x11->xwin_width,
stage_x11->xwin_height,
0,
stage_x11->xvisinfo->depth,
InputOutput,
stage_x11->xvisinfo->visual,
mask, &xattr);
}
if (clutter_x11_has_event_retrieval())
{
if (clutter_x11_has_xinput())
{
XSelectInput (stage_x11->xdpy, stage_x11->xwin,
StructureNotifyMask |
FocusChangeMask |
ExposureMask |
KeyPressMask | KeyReleaseMask |
EnterWindowMask | LeaveWindowMask |
PropertyChangeMask);
#ifdef USE_XINPUT
_clutter_x11_select_events (stage_x11->xwin);
#endif
}
else
XSelectInput (stage_x11->xdpy, stage_x11->xwin,
StructureNotifyMask |
FocusChangeMask |
ExposureMask |
PointerMotionMask |
KeyPressMask | KeyReleaseMask |
ButtonPressMask | ButtonReleaseMask |
EnterWindowMask | LeaveWindowMask |
PropertyChangeMask);
}
/* no user resize.. */
clutter_stage_x11_fix_window_size (stage_x11);
clutter_stage_x11_set_wm_protocols (stage_x11);
if (G_UNLIKELY (backend_glx->gl_context == None))
{
CLUTTER_NOTE (GL, "Creating GL Context");
backend_glx->gl_context = glXCreateContext (stage_x11->xdpy,
stage_x11->xvisinfo,
0,
True);
if (backend_glx->gl_context == None)
{
g_critical ("Unable to create suitable GL context.");
goto fail;
}
_cogl_set_indirect_context (!glXIsDirect (stage_x11->xdpy,
backend_glx->gl_context));
}
CLUTTER_NOTE (BACKEND, "Marking stage as realized");
CLUTTER_ACTOR_SET_FLAGS (stage_x11, CLUTTER_ACTOR_REALIZED);
}
else
{
int gl_attributes[] = {
GLX_DEPTH_SIZE, 0,
GLX_ALPHA_SIZE, 0,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_USE_GL,
GLX_RGBA,
0
};
if (stage_x11->xvisinfo)
XFree (stage_x11->xvisinfo);
stage_x11->xvisinfo = NULL;
CLUTTER_NOTE (GL, "glXChooseVisual");
stage_x11->xvisinfo = glXChooseVisual (stage_x11->xdpy,
stage_x11->xscreen,
gl_attributes);
if (!stage_x11->xvisinfo)
{
g_critical ("Unable to find suitable GL visual.");
goto fail;
}
stage_x11->xpixmap = XCreatePixmap (stage_x11->xdpy,
stage_x11->xwin_root,
stage_x11->xwin_width,
stage_x11->xwin_height,
DefaultDepth (stage_x11->xdpy,
stage_x11->xscreen));
stage_glx->glxpixmap = glXCreateGLXPixmap (stage_x11->xdpy,
stage_x11->xvisinfo,
stage_x11->xpixmap);
if (backend_glx->gl_context == None)
{
CLUTTER_NOTE (GL, "Creating GL Context");
/* FIXME: we probably need a seperate offscreen context here
* - though it likely makes most sense to drop offscreen stages
* and rely on FBO's instead and GLXPixmaps seems mostly broken
* anyway..
*/
backend_glx->gl_context = glXCreateContext (stage_x11->xdpy,
stage_x11->xvisinfo,
0,
False);
if (backend_glx->gl_context == None)
{
g_critical ("Unable to create suitable GL context.");
goto fail;
}
}
CLUTTER_NOTE (BACKEND, "Marking stage as realized");
CLUTTER_ACTOR_SET_FLAGS (stage_x11, CLUTTER_ACTOR_REALIZED);
}
/* we need to chain up to the X11 stage implementation in order to
* set the window state in case we set it before realizing the stage
*/
CLUTTER_ACTOR_CLASS (clutter_stage_glx_parent_class)->realize (actor);
return;
fail:
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
}
static void
clutter_stage_glx_dispose (GObject *gobject)
{
G_OBJECT_CLASS (clutter_stage_glx_parent_class)->dispose (gobject);
}
static void
clutter_stage_glx_class_init (ClutterStageGLXClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
gobject_class->dispose = clutter_stage_glx_dispose;
actor_class->realize = clutter_stage_glx_realize;
actor_class->unrealize = clutter_stage_glx_unrealize;
}
static void
clutter_stage_glx_init (ClutterStageGLX *stage)
{
}
static void
clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
{
/* the rest is inherited from ClutterStageX11 */
}
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