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path: root/src/cheese-texture.c
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/*
 * GStreamer
 * Copyright (C) 2009 Filippo Argiolas <filippo.argiolas@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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.
 */

#include "cheese-texture.h"

#include <X11/Xlib.h>
#include <X11/extensions/Xcomposite.h>

#include <clutter/clutter.h>
#include <clutter/x11/clutter-x11.h>
#include <clutter/glx/clutter-glx.h>
#include <gst/gst.h>
#include <gst/interfaces/xoverlay.h>

G_DEFINE_TYPE (CheeseTexture, cheese_texture, CLUTTER_GLX_TYPE_TEXTURE_PIXMAP);

#define CHEESE_TEXTURE_GET_PRIVATE(o) \
  (G_TYPE_INSTANCE_GET_PRIVATE ((o), CHEESE_TYPE_TEXTURE, CheeseTexturePrivate))

struct _CheeseTexturePrivate
{
  /* stuff */
  Window parent;
};

static ClutterX11FilterReturn
on_x_event_filter (XEvent * xev, ClutterEvent * cev, gpointer data);

static ClutterX11FilterReturn
on_x_event_filter (XEvent * xev, ClutterEvent * cev, gpointer data)
{
  CheeseTexture *self = CHEESE_TEXTURE (data);
  CheeseTexturePrivate *priv = self->priv = CHEESE_TEXTURE_GET_PRIVATE (self);

  Window window;

  if (xev->xany.window != priv->parent)
    return CLUTTER_X11_FILTER_CONTINUE;

  g_object_get (self, "window", &window, NULL);
  if (window == None)
    return;

  switch (xev->type) {
    case MapNotify:
      g_message ("stage mapped %d", xev->xmap.window);
      XMapWindow (xev->xmap.display, window);
      break;
    case UnmapNotify:
      g_message ("stage unmapped %d", xev->xmap.window);
      XUnmapWindow (xev->xmap.display, window);
      break;
    default:
      break;
  }
  return CLUTTER_X11_FILTER_CONTINUE;
}

static void
cheese_texture_dispose (GObject *object)
{
  CheeseTexture *self = CHEESE_TEXTURE (object);
  Window window;

  g_object_get (self, "window", &window, NULL);

  clutter_x11_remove_filter (on_x_event_filter, NULL);

  G_OBJECT_CLASS (cheese_texture_parent_class)->dispose (object);

  if (window != None)
    XDestroyWindow (clutter_x11_get_default_display (), window);
}

static void
cheese_texture_class_init (CheeseTextureClass * klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);

  g_type_class_add_private (klass, sizeof (CheeseTexturePrivate));

  gobject_class->dispose = cheese_texture_dispose;
}

static void
cheese_texture_init (CheeseTexture * self)
{
  CheeseTexturePrivate *priv = self->priv = CHEESE_TEXTURE_GET_PRIVATE (self);
  Display *disp;
  Window win;
  Window stage_win;
  XSetWindowAttributes attr;
  unsigned long mask;

  ClutterActor *stage;

  disp = clutter_x11_get_default_display ();

  stage = clutter_stage_get_default ();
  stage_win = clutter_x11_get_stage_window (CLUTTER_STAGE (stage));

  attr.background_pixel = BlackPixel (disp, DefaultScreen (disp));
  attr.override_redirect = True;
  attr.event_mask = SubstructureNotifyMask | StructureNotifyMask;
  mask = CWEventMask | CWBackPixel | CWOverrideRedirect;

  win = XCreateWindow (disp, stage_win,
      0, 0, DEFAULT_W, DEFAULT_H, 0,
      CopyFromParent, InputOutput, CopyFromParent, mask, &attr);

  priv->parent = stage_win;

  XCompositeRedirectWindow (disp, win, CompositeRedirectManual);

  g_object_set (self, "window", win, "automatic-updates", TRUE, NULL);

  clutter_x11_add_filter (on_x_event_filter, self);
}

ClutterActor *
cheese_texture_new (void)
{
  ClutterActor *self = g_object_new (CHEESE_TYPE_TEXTURE, NULL);

  return self;
}