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mutter/clutter/x11/clutter-x11-texture-pixmap.c
Owen W. Taylor 6fcc8c5bce x11: Use has_allocation() in TfP actor 
ClutterX11TexturePixmap calls get_allocation_box() when queueing a
clipped redraw. If the allocation is not valid, and if we queue a
lot of redraws in response to a series of damage events, the net
result is that we spend all our time in a re-layout. We can
short-circuit this by checking if the actor has a valid allocation, and
if not, just queue a redraw - the actor will be allocated by the time it
is going to be painted.

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
2010-03-26 00:46:43 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Johan Bilien <johan.bilien@nokia.com>
*
* Copyright (C) 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/>.
*
*
*/
/**
* SECTION:clutter-x11-texture-pixmap
* @short_description: A texture which displays the content of an X Pixmap.
*
* #ClutterX11TexturePixmap is a class for displaying the content of an
* X Pixmap as a ClutterActor. Used together with the X Composite extension,
* it allows to display the content of X Windows inside Clutter.
*
* The class uses the GLX_EXT_texture_from_pixmap OpenGL extension
* (http://people.freedesktop.org/~davidr/GLX_EXT_texture_from_pixmap.txt)
* if available
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "../clutter-marshal.h"
#include "clutter-x11-texture-pixmap.h"
#include "clutter-x11.h"
#include "clutter-backend-x11.h"
#include "clutter-private.h"
#include "cogl/cogl.h"
#include <X11/extensions/Xdamage.h>
#include <X11/extensions/Xcomposite.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/time.h>
#include <X11/extensions/XShm.h>
enum
{
PROP_PIXMAP = 1,
PROP_PIXMAP_WIDTH,
PROP_PIXMAP_HEIGHT,
PROP_DEPTH,
PROP_AUTO,
PROP_WINDOW,
PROP_WINDOW_REDIRECT_AUTOMATIC,
PROP_WINDOW_MAPPED,
PROP_DESTROYED,
PROP_WINDOW_X,
PROP_WINDOW_Y,
PROP_WINDOW_OVERRIDE_REDIRECT
};
enum
{
UPDATE_AREA,
QUEUE_DAMAGE_REDRAW,
/* FIXME: Pixmap lost signal? */
LAST_SIGNAL
};
static ClutterX11FilterReturn
on_x_event_filter (XEvent *xev, ClutterEvent *cev, gpointer data);
static void
clutter_x11_texture_pixmap_update_area_real (ClutterX11TexturePixmap *texture,
gint x,
gint y,
gint width,
gint height);
static void
clutter_x11_texture_pixmap_set_mapped (ClutterX11TexturePixmap *texture, gboolean mapped);
static void
clutter_x11_texture_pixmap_destroyed (ClutterX11TexturePixmap *texture);
static guint signals[LAST_SIGNAL] = { 0, };
struct _ClutterX11TexturePixmapPrivate
{
Window window;
Pixmap pixmap;
guint pixmap_width, pixmap_height;
guint depth;
XImage *image;
XShmSegmentInfo shminfo;
gboolean automatic_updates;
Damage damage;
Drawable damage_drawable;
/* FIXME: lots of gbooleans. coalesce into bitfields */
gboolean have_shm;
gboolean window_redirect_automatic;
gboolean window_mapped;
gboolean destroyed;
gboolean owns_pixmap;
gboolean override_redirect;
gint window_x, window_y;
};
static int _damage_event_base = 0;
/* FIXME: Ultimatly with current cogl we should subclass clutter actor */
G_DEFINE_TYPE (ClutterX11TexturePixmap, \
clutter_x11_texture_pixmap, \
CLUTTER_TYPE_TEXTURE);
static gboolean
check_extensions (ClutterX11TexturePixmap *texture)
{
int damage_error;
ClutterX11TexturePixmapPrivate *priv;
Display *dpy;
priv = texture->priv;
if (_damage_event_base)
return TRUE;
dpy = clutter_x11_get_default_display();
if (!XDamageQueryExtension (dpy,
&_damage_event_base, &damage_error))
{
g_warning ("No Damage extension");
return FALSE;
}
return TRUE;
}
static void
free_shm_resources (ClutterX11TexturePixmap *texture)
{
ClutterX11TexturePixmapPrivate *priv;
priv = texture->priv;
if (priv->shminfo.shmid != -1)
{
XShmDetach(clutter_x11_get_default_display(),
&priv->shminfo);
shmdt(priv->shminfo.shmaddr);
shmctl(priv->shminfo.shmid, IPC_RMID, 0);
priv->shminfo.shmid = -1;
}
}
/* Tries to allocate enough shared mem to handle a full size
* update size of the X Pixmap. */
static gboolean
try_alloc_shm (ClutterX11TexturePixmap *texture)
{
ClutterX11TexturePixmapPrivate *priv;
XImage *dummy_image;
Display *dpy;
priv = texture->priv;
dpy = clutter_x11_get_default_display();
g_return_val_if_fail (priv->pixmap, FALSE);
if (!XShmQueryExtension(dpy) || g_getenv("CLUTTER_X11_NO_SHM"))
{
priv->have_shm = FALSE;
return FALSE;
}
clutter_x11_trap_x_errors ();
/* We are creating a dummy_image so we can have Xlib calculate
* image->bytes_per_line - including any magic padding it may
* want - for the largest possible ximage we might need to use
* when handling updates to the texture.
*
* Note: we pass a NULL shminfo here, but that has no bearing
* on the setup of the XImage, except that ximage->obdata will
* == NULL.
*/
dummy_image =
XShmCreateImage(dpy,
DefaultVisual(dpy,
clutter_x11_get_default_screen()),
priv->depth,
ZPixmap,
NULL,
NULL, /* shminfo, */
priv->pixmap_width,
priv->pixmap_height);
if (!dummy_image)
goto failed_image_create;
priv->shminfo.shmid = shmget (IPC_PRIVATE,
dummy_image->bytes_per_line
* dummy_image->height,
IPC_CREAT | 0777);
if (priv->shminfo.shmid == -1)
goto failed_shmget;
priv->shminfo.shmaddr = shmat (priv->shminfo.shmid, 0, 0);
if (priv->shminfo.shmaddr == (void *) -1)
goto failed_shmat;
priv->shminfo.readOnly = False;
if (XShmAttach (dpy, &priv->shminfo) == 0)
goto failed_xshmattach;
if (clutter_x11_untrap_x_errors ())
g_warning ("X Error: Failed to setup XShm");
XDestroyImage (dummy_image);
priv->have_shm = TRUE;
return TRUE;
failed_xshmattach:
g_warning ("XShmAttach failed");
shmdt (priv->shminfo.shmaddr);
failed_shmat:
g_warning ("shmat failed");
shmctl (priv->shminfo.shmid, IPC_RMID, 0);
failed_shmget:
g_warning ("shmget failed");
XDestroyImage (dummy_image);
failed_image_create:
if (clutter_x11_untrap_x_errors ())
g_warning ("X Error: Failed to setup XShm");
priv->have_shm = FALSE;
return FALSE;
}
static void
check_for_pixmap_damage (ClutterX11TexturePixmap *texture)
{
ClutterX11TexturePixmapPrivate *priv = texture->priv;
Display *dpy;
XserverRegion parts;
int i, r_count;
XRectangle *r_damage;
XRectangle r_bounds;
clutter_x11_trap_x_errors ();
/*
* Retrieve the damaged region and break it down into individual
* rectangles so we do not have to update the whole shebang.
*/
dpy = clutter_x11_get_default_display();
parts = XFixesCreateRegion (dpy, 0, 0);
XDamageSubtract (dpy, priv->damage, None, parts);
r_damage = XFixesFetchRegionAndBounds (dpy,
parts,
&r_count,
&r_bounds);
clutter_x11_untrap_x_errors ();
if (r_damage)
{
for (i = 0; i < r_count; ++i)
clutter_x11_texture_pixmap_update_area (texture,
r_damage[i].x,
r_damage[i].y,
r_damage[i].width,
r_damage[i].height);
XFree (r_damage);
}
XFixesDestroyRegion (dpy, parts);
}
static ClutterX11FilterReturn
on_x_event_filter (XEvent *xev, ClutterEvent *cev, gpointer data)
{
ClutterX11TexturePixmap *texture;
ClutterX11TexturePixmapPrivate *priv;
texture = CLUTTER_X11_TEXTURE_PIXMAP (data);
g_return_val_if_fail (CLUTTER_X11_IS_TEXTURE_PIXMAP (texture), \
CLUTTER_X11_FILTER_CONTINUE);
priv = texture->priv;
if (xev->type == _damage_event_base + XDamageNotify)
{
XDamageNotifyEvent *dev = (XDamageNotifyEvent*)xev;
if (dev->drawable != priv->damage_drawable)
return CLUTTER_X11_FILTER_CONTINUE;
check_for_pixmap_damage (texture);
}
return CLUTTER_X11_FILTER_CONTINUE;
}
static ClutterX11FilterReturn
on_x_event_filter_too (XEvent *xev, ClutterEvent *cev, gpointer data)
{
ClutterX11TexturePixmap *texture;
ClutterX11TexturePixmapPrivate *priv;
texture = CLUTTER_X11_TEXTURE_PIXMAP (data);
g_return_val_if_fail (CLUTTER_X11_IS_TEXTURE_PIXMAP (texture), \
CLUTTER_X11_FILTER_CONTINUE);
priv = texture->priv;
if (xev->xany.window != priv->window)
return CLUTTER_X11_FILTER_CONTINUE;
switch (xev->type) {
case MapNotify:
case ConfigureNotify:
clutter_x11_texture_pixmap_sync_window (texture);
break;
case UnmapNotify:
clutter_x11_texture_pixmap_set_mapped (texture, FALSE);
break;
case DestroyNotify:
clutter_x11_texture_pixmap_destroyed (texture);
break;
default:
break;
}
return CLUTTER_X11_FILTER_CONTINUE;
}
static void
create_damage_resources (ClutterX11TexturePixmap *texture)
{
ClutterX11TexturePixmapPrivate *priv;
Display *dpy;
priv = texture->priv;
dpy = clutter_x11_get_default_display();
if (!priv->window && !priv->pixmap)
return;
clutter_x11_trap_x_errors ();
if (priv->window)
priv->damage_drawable = priv->window;
else
priv->damage_drawable = priv->pixmap;
priv->damage = XDamageCreate (dpy,
priv->damage_drawable,
XDamageReportNonEmpty);
/* Errors here might occur if the window is already destroyed, we
* simply skip processing damage and assume that the texture pixmap
* will be cleaned up by the app when it gets a DestroyNotify.
*/
XSync (dpy, FALSE);
clutter_x11_untrap_x_errors ();
if (priv->damage)
clutter_x11_add_filter (on_x_event_filter, (gpointer)texture);
}
static void
free_damage_resources (ClutterX11TexturePixmap *texture)
{
ClutterX11TexturePixmapPrivate *priv;
Display *dpy;
priv = texture->priv;
dpy = clutter_x11_get_default_display();
if (priv->damage)
{
clutter_x11_trap_x_errors ();
XDamageDestroy (dpy, priv->damage);
XSync (dpy, FALSE);
clutter_x11_untrap_x_errors ();
priv->damage = None;
priv->damage_drawable = None;
clutter_x11_remove_filter (on_x_event_filter, (gpointer)texture);
}
}
static void
clutter_x11_texture_pixmap_real_queue_damage_redraw (
ClutterX11TexturePixmap *texture,
gint x,
gint y,
gint width,
gint height)
{
ClutterActor *self = CLUTTER_ACTOR (texture);
ClutterActorBox allocation;
guint pixmap_width = 0;
guint pixmap_height = 0;
float scale_x;
float scale_y;
ClutterActorBox clip;
/* NB: clutter_actor_queue_clipped_redraw expects a box in the actor's
* coordinate space so we need to convert from pixmap coordinates to
* actor coordinates...
*/
/* Calling clutter_actor_get_allocation_box() is enormously expensive
* if the actor has an out-of-date allocation, since it triggers
* a full redraw. clutter_actor_queue_clipped_redraw() would redraw
* the whole stage anyways in that case, so just go ahead and do
* it here.
*/
if (!clutter_actor_has_allocation (self))
{
clutter_actor_queue_redraw (self);
return;
}
clutter_actor_get_allocation_box (self, &allocation);
g_object_get (self,
"pixmap-width", &pixmap_width,
"pixmap-height", &pixmap_height,
NULL);
scale_x = (allocation.x2 - allocation.x1) / pixmap_width;
scale_y = (allocation.y2 - allocation.y1) / pixmap_height;
clip.x1 = x * scale_x;
clip.y1 = y * scale_y;
clip.x2 = clip.x1 + width * scale_x;
clip.y2 = clip.y1 + height * scale_y;
_clutter_actor_queue_redraw_with_clip (self,
CLUTTER_REDRAW_CLIPPED_TO_BOX,
&clip);
}
static void
clutter_x11_texture_pixmap_init (ClutterX11TexturePixmap *self)
{
self->priv =
G_TYPE_INSTANCE_GET_PRIVATE (self,
CLUTTER_X11_TYPE_TEXTURE_PIXMAP,
ClutterX11TexturePixmapPrivate);
if (!check_extensions (self))
{
/* FIMXE: means display lacks needed extensions for at least auto.
* - a _can_autoupdate() method ?
*/
}
self->priv->image = NULL;
self->priv->automatic_updates = FALSE;
self->priv->damage = None;
self->priv->damage_drawable = None;
self->priv->window = None;
self->priv->pixmap = None;
self->priv->pixmap_height = 0;
self->priv->pixmap_width = 0;
self->priv->shminfo.shmid = -1;
self->priv->window_redirect_automatic = TRUE;
self->priv->window_mapped = FALSE;
self->priv->destroyed = FALSE;
self->priv->override_redirect = FALSE;
self->priv->window_x = 0;
self->priv->window_y = 0;
}
static void
clutter_x11_texture_pixmap_dispose (GObject *object)
{
ClutterX11TexturePixmap *texture = CLUTTER_X11_TEXTURE_PIXMAP (object);
ClutterX11TexturePixmapPrivate *priv = texture->priv;
free_damage_resources (texture);
clutter_x11_remove_filter (on_x_event_filter_too, (gpointer)texture);
if (priv->owns_pixmap && priv->pixmap)
{
XFreePixmap (clutter_x11_get_default_display (), priv->pixmap);
priv->pixmap = None;
}
if (priv->image)
{
XDestroyImage (priv->image);
priv->image = NULL;
}
free_shm_resources (texture);
G_OBJECT_CLASS (clutter_x11_texture_pixmap_parent_class)->dispose (object);
}
static void
clutter_x11_texture_pixmap_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterX11TexturePixmap *texture = CLUTTER_X11_TEXTURE_PIXMAP (object);
ClutterX11TexturePixmapPrivate *priv = texture->priv;
switch (prop_id)
{
case PROP_PIXMAP:
clutter_x11_texture_pixmap_set_pixmap (texture,
g_value_get_ulong (value));
break;
case PROP_AUTO:
clutter_x11_texture_pixmap_set_automatic (texture,
g_value_get_boolean (value));
break;
case PROP_WINDOW:
clutter_x11_texture_pixmap_set_window (texture,
g_value_get_ulong (value),
priv->window_redirect_automatic);
break;
case PROP_WINDOW_REDIRECT_AUTOMATIC:
{
gboolean new;
new = g_value_get_boolean (value);
/* Change the update mode.. */
if (new != priv->window_redirect_automatic && priv->window)
clutter_x11_texture_pixmap_set_window (texture, priv->window, new);
priv->window_redirect_automatic = new;
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_x11_texture_pixmap_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterX11TexturePixmap *texture = CLUTTER_X11_TEXTURE_PIXMAP (object);
ClutterX11TexturePixmapPrivate *priv = texture->priv;
switch (prop_id)
{
case PROP_PIXMAP:
g_value_set_ulong (value, priv->pixmap);
break;
case PROP_PIXMAP_WIDTH:
g_value_set_uint (value, priv->pixmap_width);
break;
case PROP_PIXMAP_HEIGHT:
g_value_set_uint (value, priv->pixmap_height);
break;
case PROP_DEPTH:
g_value_set_uint (value, priv->depth);
break;
case PROP_AUTO:
g_value_set_boolean (value, priv->automatic_updates);
break;
case PROP_WINDOW:
g_value_set_ulong (value, priv->window);
break;
case PROP_WINDOW_REDIRECT_AUTOMATIC:
g_value_set_boolean (value, priv->window_redirect_automatic);
break;
case PROP_WINDOW_MAPPED:
g_value_set_boolean (value, priv->window_mapped);
break;
case PROP_DESTROYED:
g_value_set_boolean (value, priv->destroyed);
break;
case PROP_WINDOW_X:
g_value_set_int (value, priv->window_x);
break;
case PROP_WINDOW_Y:
g_value_set_int (value, priv->window_y);
break;
case PROP_WINDOW_OVERRIDE_REDIRECT:
g_value_set_boolean (value, priv->override_redirect);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_x11_texture_pixmap_realize (ClutterActor *actor)
{
ClutterX11TexturePixmap *texture = CLUTTER_X11_TEXTURE_PIXMAP (actor);
ClutterX11TexturePixmapPrivate *priv = texture->priv;
CLUTTER_ACTOR_CLASS (clutter_x11_texture_pixmap_parent_class)->
realize (actor);
clutter_x11_texture_pixmap_update_area_real (texture,
0, 0,
priv->pixmap_width,
priv->pixmap_height);
}
static void
clutter_x11_texture_pixmap_class_init (ClutterX11TexturePixmapClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
GParamSpec *pspec;
ClutterBackend *default_backend;
g_type_class_add_private (klass, sizeof (ClutterX11TexturePixmapPrivate));
object_class->dispose = clutter_x11_texture_pixmap_dispose;
object_class->set_property = clutter_x11_texture_pixmap_set_property;
object_class->get_property = clutter_x11_texture_pixmap_get_property;
actor_class->realize = clutter_x11_texture_pixmap_realize;
klass->update_area = clutter_x11_texture_pixmap_update_area_real;
pspec = g_param_spec_ulong ("pixmap",
"Pixmap",
"The X11 Pixmap to be bound",
0, G_MAXULONG,
None,
G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_PIXMAP, pspec);
pspec = g_param_spec_uint ("pixmap-width",
"Pixmap width",
"The width of the "
"pixmap bound to this texture",
0, G_MAXUINT,
0,
G_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_PIXMAP_WIDTH, pspec);
pspec = g_param_spec_uint ("pixmap-height",
"Pixmap height",
"The height of the "
"pixmap bound to this texture",
0, G_MAXUINT,
0,
G_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_PIXMAP_HEIGHT, pspec);
pspec = g_param_spec_uint ("pixmap-depth",
"Pixmap Depth",
"The depth (in number of bits) of the "
"pixmap bound to this texture",
0, G_MAXUINT,
0,
G_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_DEPTH, pspec);
pspec = g_param_spec_boolean ("automatic-updates",
"Automatic Updates",
"If the texture should be kept in "
"sync with any pixmap changes.",
FALSE,
G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_AUTO, pspec);
pspec = g_param_spec_ulong ("window",
"Window",
"The X11 Window to be bound",
0, G_MAXULONG,
None,
G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_WINDOW, pspec);
pspec = g_param_spec_boolean ("window-redirect-automatic",
"Window Redirect Automatic",
"If composite window redirects are set to "
"Automatic (or Manual if false)",
TRUE,
G_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_WINDOW_REDIRECT_AUTOMATIC, pspec);
pspec = g_param_spec_boolean ("window-mapped",
"Window Mapped",
"If window is mapped",
FALSE,
G_PARAM_READABLE);
g_object_class_install_property (object_class,
PROP_WINDOW_MAPPED, pspec);
pspec = g_param_spec_boolean ("destroyed",
"Destroyed",
"If window has been destroyed",
FALSE,
G_PARAM_READABLE);
g_object_class_install_property (object_class,
PROP_DESTROYED, pspec);
pspec = g_param_spec_int ("window-x",
"Window X",
"X position of window on screen according to X11",
G_MININT, G_MAXINT, 0, G_PARAM_READABLE);
g_object_class_install_property (object_class,
PROP_WINDOW_X, pspec);
pspec = g_param_spec_int ("window-y",
"Window Y",
"Y position of window on screen according to X11",
G_MININT, G_MAXINT, 0, G_PARAM_READABLE);
g_object_class_install_property (object_class,
PROP_WINDOW_Y, pspec);
pspec = g_param_spec_boolean ("window-override-redirect",
"Window Override Redirect",
"If this is an override-redirect window",
FALSE,
G_PARAM_READABLE);
g_object_class_install_property (object_class,
PROP_WINDOW_OVERRIDE_REDIRECT, pspec);
/**
* ClutterX11TexturePixmap::update-area:
* @texture: the object which received the signal
*
* The ::hide signal is emitted to ask the texture to update its
* content from its source pixmap.
*
* Since: 0.8
*/
signals[UPDATE_AREA] =
g_signal_new ("update-area",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (ClutterX11TexturePixmapClass, \
update_area),
NULL, NULL,
clutter_marshal_VOID__INT_INT_INT_INT,
G_TYPE_NONE, 4,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT);
/**
* ClutterX11TexturePixmap::queue-damage-redraw
* @texture: the object which received the signal
* @x: The top left x position of the damage region
* @y: The top left y position of the damage region
* @width: The width of the damage region
* @height: The height of the damage region
*
* ::queue-damage-redraw is emitted to notify that some sub-region of the
* underlying pixmap has changed and you need to queue a
* corresponding redraw for the actor.
*
* The default handler will queue a clipped redraw in response to
* the damage, using the assumption that the pixmap is being painted
* to a rectangle covering the transformed allocation of the actor.
* If you sub-class and change the paint method so this isn't true
* then you must also provide your own damage signal handler to
* queue a redraw that blocks this default behaviour.
*
* Since: 1.2
*/
signals[QUEUE_DAMAGE_REDRAW] =
g_signal_new (g_intern_static_string ("queue-damage-redraw"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
0,
NULL, NULL,
clutter_marshal_VOID__INT_INT_INT_INT,
G_TYPE_NONE, 4,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT);
g_signal_override_class_handler ("queue-damage-redraw",
CLUTTER_X11_TYPE_TEXTURE_PIXMAP,
G_CALLBACK (clutter_x11_texture_pixmap_real_queue_damage_redraw));
default_backend = clutter_get_default_backend ();
if (!CLUTTER_IS_BACKEND_X11 (default_backend))
{
g_critical ("ClutterX11TexturePixmap instanciated with a "
"non-X11 backend");
return;
}
}
static void
clutter_x11_texture_pixmap_update_area_real (ClutterX11TexturePixmap *texture,
gint x,
gint y,
gint width,
gint height)
{
ClutterX11TexturePixmapPrivate *priv;
Display *dpy;
XImage *image;
char *first_pixel;
GError *error = NULL;
guint bytes_per_line;
char *data;
gboolean data_allocated = FALSE;
int err_code;
if (!CLUTTER_ACTOR_IS_REALIZED (texture))
return;
priv = texture->priv;
dpy = clutter_x11_get_default_display();
if (!priv->pixmap)
return;
if (priv->shminfo.shmid == -1)
try_alloc_shm (texture);
clutter_x11_trap_x_errors ();
if (priv->have_shm)
{
image =
XShmCreateImage(dpy,
DefaultVisual(dpy,
clutter_x11_get_default_screen()),
priv->depth,
ZPixmap,
NULL,
&priv->shminfo,
width,
height);
image->data = priv->shminfo.shmaddr;
XShmGetImage (dpy, priv->pixmap, image, x, y, AllPlanes);
first_pixel = image->data;
}
else
{
if (!priv->image)
{
priv->image = XGetImage (dpy,
priv->pixmap,
0, 0,
priv->pixmap_width, priv->pixmap_height,
AllPlanes,
ZPixmap);
first_pixel = priv->image->data + priv->image->bytes_per_line * y
+ x * priv->image->bits_per_pixel/8;
}
else
{
XGetSubImage (dpy,
priv->pixmap,
x, y,
width, height,
AllPlanes,
ZPixmap,
priv->image,
x, y);
first_pixel = priv->image->data + priv->image->bytes_per_line * y
+ x * priv->image->bits_per_pixel/8;
}
image = priv->image;
}
XSync (dpy, FALSE);
if ((err_code = clutter_x11_untrap_x_errors ()))
{
g_warning ("Failed to get XImage of pixmap: %lx, removing",
priv->pixmap);
/* safe to assume pixmap has gone away? - therefor reset */
clutter_x11_texture_pixmap_set_pixmap (texture, None);
return;
}
if (priv->depth == 24)
{
guint xpos, ypos;
for (ypos=0; ypos<height; ypos++)
for (xpos=0; xpos<width; xpos++)
{
char *p = first_pixel + image->bytes_per_line*ypos
+ xpos * 4;
p[3] = 0xFF;
}
data = first_pixel;
bytes_per_line = image->bytes_per_line;
}
else if (priv->depth == 16)
{
guint xpos, ypos;
data = g_malloc (height * width * 4);
data_allocated = TRUE;
bytes_per_line = width * 4;
for (ypos=0; ypos<height; ypos++)
for (xpos=0; xpos<width; xpos++)
{
char *src_p = first_pixel + image->bytes_per_line * ypos
+ xpos * 2;
guint16 *src_pixel = (guint16 *)src_p;
char *dst_p = data + bytes_per_line * ypos + xpos * 4;
guint32 *dst_pixel = (guint32 *)dst_p;
*dst_pixel =
((((*src_pixel << 3) & 0xf8) | ((*src_pixel >> 2) & 0x7)) | \
(((*src_pixel << 5) & 0xfc00) | ((*src_pixel >> 1) & 0x300)) | \
(((*src_pixel << 8) & 0xf80000) | ((*src_pixel << 3) & 0x70000)))
| 0xff000000;
}
}
else if (priv->depth == 32)
{
bytes_per_line = image->bytes_per_line;
data = first_pixel;
}
else
return;
/* For debugging purposes, un comment to simply generate dummy
* pixmap data. (A Green background and Blue cross) */
#if 0
{
guint xpos, ypos;
if (data_allocated)
g_free (data);
data_allocated = TRUE;
data = g_malloc (width*height*4);
bytes_per_line = width *4;
for (ypos=0; ypos<height; ypos++)
for (xpos=0; xpos<width; xpos++)
{
char *p = data + width*4*ypos + xpos * 4;
guint32 *pixel = (guint32 *)p;
if ((xpos > width/2 && xpos <= (width/2) + width/4)
|| (ypos > height/2 && ypos <= (height/2) + height/4))
*pixel=0xff0000ff;
else
*pixel=0xff00ff00;
}
}
#endif
if (x != 0 || y != 0 ||
width != priv->pixmap_width || height != priv->pixmap_height)
clutter_texture_set_area_from_rgb_data (CLUTTER_TEXTURE (texture),
(guint8 *)data,
TRUE,
x, y,
width, height,
bytes_per_line,
4,
CLUTTER_TEXTURE_RGB_FLAG_BGR |
CLUTTER_TEXTURE_RGB_FLAG_PREMULT,
&error);
else
clutter_texture_set_from_rgb_data (CLUTTER_TEXTURE (texture),
(guint8 *)data,
TRUE,
width, height,
bytes_per_line,
4,
CLUTTER_TEXTURE_RGB_FLAG_BGR |
CLUTTER_TEXTURE_RGB_FLAG_PREMULT,
&error);
if (error)
{
g_warning ("Error when uploading from pixbuf: %s",
error->message);
g_error_free (error);
}
if (data_allocated)
g_free (data);
if (priv->have_shm)
XFree (image);
}
/**
* clutter_x11_texture_pixmap_new:
*
* Creates a new #ClutterX11TexturePixmap which can be used to display the
* contents of an X11 Pixmap inside a Clutter scene graph
*
* Return value: A new #ClutterX11TexturePixmap
*
* Since: 0.8
*/
ClutterActor *
clutter_x11_texture_pixmap_new (void)
{
ClutterActor *actor;
actor = g_object_new (CLUTTER_X11_TYPE_TEXTURE_PIXMAP, NULL);
return actor;
}
/**
* clutter_x11_texture_pixmap_new_with_pixmap:
* @pixmap: the X Pixmap to which this texture should be bound
*
* Creates a new #ClutterX11TexturePixmap for @pixmap
*
* Return value: A new #ClutterX11TexturePixmap bound to the given X Pixmap
*
* Since: 0.8
*/
ClutterActor *
clutter_x11_texture_pixmap_new_with_pixmap (Pixmap pixmap)
{
ClutterActor *actor;
actor = g_object_new (CLUTTER_X11_TYPE_TEXTURE_PIXMAP,
"pixmap", pixmap,
NULL);
return actor;
}
/**
* clutter_x11_texture_pixmap_new_with_window:
* @window: the X window to which this texture should be bound
*
* Creates a new #ClutterX11TexturePixmap for @window
*
* Return value: A new #ClutterX11TexturePixmap bound to the given X window.
*
* Since: 0.8
**/
ClutterActor *
clutter_x11_texture_pixmap_new_with_window (Window window)
{
ClutterActor *actor;
actor = g_object_new (CLUTTER_X11_TYPE_TEXTURE_PIXMAP,
"window", window,
NULL);
return actor;
}
/**
* clutter_x11_texture_pixmap_set_pixmap:
* @texture: the texture to bind
* @pixmap: the X Pixmap to which the texture should be bound
*
* Sets the X Pixmap to which the texture should be bound.
*
* Since: 0.8
*/
void
clutter_x11_texture_pixmap_set_pixmap (ClutterX11TexturePixmap *texture,
Pixmap pixmap)
{
Window root;
int x, y;
unsigned int width, height, border_width, depth;
Status status = 0;
gboolean new_pixmap = FALSE, new_pixmap_width = FALSE;
gboolean new_pixmap_height = FALSE, new_pixmap_depth = FALSE;
ClutterX11TexturePixmapPrivate *priv;
g_return_if_fail (CLUTTER_X11_IS_TEXTURE_PIXMAP (texture));
priv = texture->priv;
clutter_x11_trap_x_errors ();
status = XGetGeometry (clutter_x11_get_default_display(),
(Drawable)pixmap,
&root,
&x,
&y,
&width,
&height,
&border_width,
&depth);
if (clutter_x11_untrap_x_errors () || status == 0)
{
if (pixmap != None)
g_warning ("Unable to query pixmap: %lx", pixmap);
pixmap = None;
width = height = depth = 0;
}
if (priv->image)
{
XDestroyImage (priv->image);
priv->image = NULL;
}
if (priv->pixmap != pixmap)
{
if (priv->pixmap && priv->owns_pixmap)
XFreePixmap (clutter_x11_get_default_display (), priv->pixmap);
priv->pixmap = pixmap;
new_pixmap = TRUE;
/* The damage object is created on the window if there is any
* but if there is no window, then we create it directly on
* the pixmap, so it needs to be recreated with a change in
* pixmap.
*/
if (priv->automatic_updates && new_pixmap && !priv->window)
{
free_damage_resources (texture);
create_damage_resources (texture);
}
}
if (priv->pixmap_width != width)
{
priv->pixmap_width = width;
new_pixmap_width = TRUE;
}
if (priv->pixmap_height != height)
{
priv->pixmap_height = height;
new_pixmap_height = TRUE;
}
if (priv->depth != depth)
{
priv->depth = depth;
new_pixmap_depth = TRUE;
}
/* NB: We defer sending the signals until updating all the
* above members so the values are all available to the
* signal handlers. */
g_object_ref (texture);
if (new_pixmap)
g_object_notify (G_OBJECT (texture), "pixmap");
if (new_pixmap_width)
g_object_notify (G_OBJECT (texture), "pixmap-width");
if (new_pixmap_height)
g_object_notify (G_OBJECT (texture), "pixmap-height");
if (new_pixmap_depth)
g_object_notify (G_OBJECT (texture), "pixmap-depth");
free_shm_resources (texture);
if (priv->depth != 0 &&
priv->pixmap != None &&
priv->pixmap_width != 0 &&
priv->pixmap_height != 0)
{
if (CLUTTER_ACTOR_IS_REALIZED (texture))
clutter_x11_texture_pixmap_update_area (texture,
0, 0,
priv->pixmap_width,
priv->pixmap_height);
}
/*
* Keep ref until here in case a notify causes removal from the scene; can't
* lower the notifies because glx's notify handler needs to run before
* update_area
*/
g_object_unref (texture);
}
/**
* clutter_x11_texture_pixmap_set_window:
* @texture: the texture to bind
* @window: the X window to which the texture should be bound
* @automatic: %TRUE for automatic window updates, %FALSE for manual.
*
* Sets up a suitable pixmap for the window, using the composite and damage
* extensions if possible, and then calls
* clutter_x11_texture_pixmap_set_pixmap().
*
* If you want to display a window in a #ClutterTexture, you probably want
* this function, or its older sister, clutter_glx_texture_pixmap_set_window()
*
* Since: 0.8
*/
void
clutter_x11_texture_pixmap_set_window (ClutterX11TexturePixmap *texture,
Window window,
gboolean automatic)
{
ClutterX11TexturePixmapPrivate *priv;
XWindowAttributes attr;
Display *dpy = clutter_x11_get_default_display ();
g_return_if_fail (CLUTTER_X11_IS_TEXTURE_PIXMAP (texture));
priv = texture->priv;
if (!clutter_x11_has_composite_extension())
return;
if (priv->window == window && automatic == priv->window_redirect_automatic)
return;
if (priv->window)
{
clutter_x11_remove_filter (on_x_event_filter_too, (gpointer)texture);
clutter_x11_trap_x_errors ();
XCompositeUnredirectWindow(clutter_x11_get_default_display (),
priv->window,
priv->window_redirect_automatic ?
CompositeRedirectAutomatic : CompositeRedirectManual);
XSync (clutter_x11_get_default_display (), False);
clutter_x11_untrap_x_errors ();
}
priv->window = window;
priv->window_redirect_automatic = automatic;
priv->window_mapped = FALSE;
priv->destroyed = FALSE;
if (window == None)
return;
clutter_x11_trap_x_errors ();
{
if (!XGetWindowAttributes (dpy, window, &attr))
{
XSync (dpy, False);
clutter_x11_untrap_x_errors ();
g_warning ("bad window 0x%x", (guint32)window);
priv->window = None;
return;
}
XCompositeRedirectWindow
(dpy,
window,
automatic ?
CompositeRedirectAutomatic : CompositeRedirectManual);
XSync (dpy, False);
}
clutter_x11_untrap_x_errors ();
if (priv->window)
{
XSelectInput (dpy, priv->window,
attr.your_event_mask | StructureNotifyMask);
clutter_x11_add_filter (on_x_event_filter_too, (gpointer)texture);
}
if (priv->automatic_updates)
{
free_damage_resources (texture);
create_damage_resources (texture);
}
g_object_ref (texture);
g_object_notify (G_OBJECT (texture), "window");
clutter_x11_texture_pixmap_set_mapped (texture,
attr.map_state == IsViewable);
clutter_x11_texture_pixmap_sync_window (texture);
g_object_unref (texture);
}
/**
* clutter_x11_texture_pixmap_sync_window:
* @texture: the texture to bind
*
* Resets the texture's pixmap from its window, perhaps in response to the
* pixmap's invalidation as the window changed size.
*
* Since: 0.8
*/
void
clutter_x11_texture_pixmap_sync_window (ClutterX11TexturePixmap *texture)
{
ClutterX11TexturePixmapPrivate *priv;
Pixmap pixmap;
g_return_if_fail (CLUTTER_X11_IS_TEXTURE_PIXMAP (texture));
priv = texture->priv;
if (priv->destroyed)
return;
if (!clutter_x11_has_composite_extension())
{
clutter_x11_texture_pixmap_set_pixmap (texture, priv->window);
return;
}
if (priv->window)
{
XWindowAttributes attr;
Display *dpy = clutter_x11_get_default_display ();
gboolean mapped = FALSE;
gboolean notify_x = FALSE;
gboolean notify_y = FALSE;
gboolean notify_override_redirect = FALSE;
Status status;
/* NB: It's only valid to name a pixmap if the window is viewable.
*
* We don't explicitly check this though since there would be a race
* between checking and naming unless we use a server grab which is
* undesireable.
*
* Instead we gracefully handle any error with naming the pixmap.
*/
clutter_x11_trap_x_errors ();
pixmap = XCompositeNameWindowPixmap (dpy, priv->window);
status = XGetWindowAttributes (dpy, priv->window, &attr);
if (status != 0)
{
notify_x = attr.x != priv->window_x;
notify_y = attr.y != priv->window_y;
notify_override_redirect = attr.override_redirect != priv->override_redirect;
priv->window_x = attr.x;
priv->window_y = attr.y;
priv->override_redirect = attr.override_redirect;
}
/* We rely on XGetWindowAttributes() implicitly syncing with the server
* so if there was an error naming the pixmap that will have been
* caught by now. */
if (clutter_x11_untrap_x_errors ())
pixmap = None;
g_object_ref (texture); /* guard against unparent */
if (pixmap)
{
clutter_x11_texture_pixmap_set_pixmap (texture, pixmap);
priv->owns_pixmap = TRUE;
}
clutter_x11_texture_pixmap_set_mapped (texture, mapped);
/* could do more clever things with a signal, i guess.. */
if (notify_override_redirect)
g_object_notify (G_OBJECT (texture), "window-override-redirect");
if (notify_x)
g_object_notify (G_OBJECT (texture), "window-x");
if (notify_y)
g_object_notify (G_OBJECT (texture), "window-y");
g_object_unref (texture);
}
}
static void
clutter_x11_texture_pixmap_set_mapped (ClutterX11TexturePixmap *texture,
gboolean mapped)
{
ClutterX11TexturePixmapPrivate *priv;
priv = texture->priv;
if (mapped != priv->window_mapped)
{
priv->window_mapped = mapped;
g_object_notify (G_OBJECT (texture), "window-mapped");
}
}
static void
clutter_x11_texture_pixmap_destroyed (ClutterX11TexturePixmap *texture)
{
ClutterX11TexturePixmapPrivate *priv;
priv = texture->priv;
if (!priv->destroyed)
{
priv->destroyed = TRUE;
g_object_notify (G_OBJECT (texture), "destroyed");
}
/*
* Don't set window to None, that would destroy the pixmap, which might still
* be useful e.g. for destroy animations -- app's responsibility.
*/
}
/**
* clutter_x11_texture_pixmap_update_area:
* @texture: The texture whose content shall be updated.
* @x: the X coordinate of the area to update
* @y: the Y coordinate of the area to update
* @width: the width of the area to update
* @height: the height of the area to update
*
* Performs the actual binding of texture to the current content of
* the pixmap. Can be called to update the texture if the pixmap
* content has changed.
*
* Since: 0.8
**/
void
clutter_x11_texture_pixmap_update_area (ClutterX11TexturePixmap *texture,
gint x,
gint y,
gint width,
gint height)
{
g_return_if_fail (CLUTTER_X11_IS_TEXTURE_PIXMAP (texture));
g_signal_emit (texture, signals[UPDATE_AREA], 0, x, y, width, height);
/* The default handler for the "queue-damage-redraw" signal is
* clutter_x11_texture_pixmap_real_queue_damage_redraw which will queue a
* clipped redraw. */
g_signal_emit (texture, signals[QUEUE_DAMAGE_REDRAW],
0, x, y, width, height);
}
/**
* clutter_x11_texture_pixmap_set_automatic:
* @texture: a #ClutterX11TexturePixmap
* @setting: %TRUE to enable automatic updates
*
* Enables or disables the automatic updates ot @texture in case the backing
* pixmap or window is damaged
*
* Since: 0.8
*/
void
clutter_x11_texture_pixmap_set_automatic (ClutterX11TexturePixmap *texture,
gboolean setting)
{
ClutterX11TexturePixmapPrivate *priv;
Display *dpy;
g_return_if_fail (CLUTTER_X11_IS_TEXTURE_PIXMAP (texture));
priv = texture->priv;
if (setting == priv->automatic_updates)
return;
dpy = clutter_x11_get_default_display();
if (setting)
create_damage_resources (texture);
else
free_damage_resources (texture);
priv->automatic_updates = setting;
}
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