#include <config.h>

#include <stdlib.h>
#include <string.h>
#include <gmodule.h>

#if HAVE_CLUTTER_GLX

#include <clutter/clutter.h>
#include <clutter/x11/clutter-x11.h>
#include <clutter/x11/clutter-x11-texture-pixmap.h>

#include <clutter/glx/clutter-glx.h>
#include <clutter/glx/clutter-glx-texture-pixmap.h>

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

#define IMAGE "redhand.png"

# ifdef USE_GDKPIXBUF
# include <gdk-pixbuf/gdk-pixbuf.h>

static gboolean disable_x11 = FALSE;
static gboolean disable_glx = FALSE;

static GOptionEntry g_options[] =
{
  { "disable-x11",
    0, 0,
    G_OPTION_ARG_NONE,
    &disable_x11,
    "Disable redirection through X11 pixmap",
    NULL },
  { "disable-glx",
    0, 0,
    G_OPTION_ARG_NONE,
    &disable_glx,
    "Disable redirection through GLX pixmap",
    NULL },

  { NULL }
};

static gboolean
stage_key_release_cb (ClutterActor *actor,
		      ClutterEvent *event,
		      gpointer      data)
{
  switch (clutter_event_get_key_symbol (event))
    {
    case CLUTTER_q:
    case CLUTTER_Q:
      clutter_main_quit ();
      break;
    }
  return FALSE;
}

static gboolean
stage_button_press_cb (ClutterActor    *actor,
		       ClutterEvent    *event,
		       gpointer         data)
{
  Pixmap        pxm = (Pixmap)data;
  Display      *dpy = clutter_x11_get_default_display ();
  GC            gc;
  XGCValues     gc_values = {0};


  gc = XCreateGC (dpy,
                  pxm,
                  0,
                  &gc_values);

  XDrawLine (dpy, pxm, gc, 0, 0, 100, 100);

  return FALSE;
}

Pixmap
create_pixmap (guint *width, guint *height, guint *depth)
{
  Display      *dpy = clutter_x11_get_default_display ();
  Pixmap        pixmap;
  GdkPixbuf    *pixbuf;
  GError       *error = NULL;
  XImage       *image;
  char         *data, *d;
  guchar       *p, *line, *endofline, *end;
  guint         w, h, rowstride;
  GC            gc;
  XGCValues     gc_values = {0};

  pixbuf = gdk_pixbuf_new_from_file (IMAGE, &error);
  if (error)
    g_error ("%s", error->message);

  /* We assume that the image had an alpha channel */
  g_assert (gdk_pixbuf_get_has_alpha (pixbuf));

  w = gdk_pixbuf_get_width  (pixbuf);
  h = gdk_pixbuf_get_height (pixbuf);
  rowstride = gdk_pixbuf_get_rowstride (pixbuf);

  data = g_malloc (w * h * 4);
  image = XCreateImage (dpy,
                        None,
                        32,
                        ZPixmap,
                        0,
                        data,
                        w, h,
                        8,
                        w * 4);

  p = gdk_pixbuf_get_pixels (pixbuf);
  d  = data;
  end = p + rowstride*h;

  /* Convert from RGBA as contained in the pixmap to ARGB as used in X */
  for (line = p; line < end ; line += rowstride)
  {
    p = line;
    endofline = p + 4 * w;

    for (p = line; p < endofline; p += 4, d+=4)
      {

#  define r ((guint32)(*(p)))
#  define g ((guint32)(*(p+1)))
#  define b ((guint32)(*(p+2)))
#  define a ((guint32)(*(p+3)))
        guint32 pixel =
            ((a << 24) & 0xFF000000  ) |
            ((r << 16) & 0x00FF0000  ) |
            ((g <<  8) & 0x0000FF00) |
            ((b)       & 0x000000FF );

        *((guint32 *)d) = pixel;

      }
#  undef r
#  undef g
#  undef b
#  undef a

  }

  g_object_unref (pixbuf);

  pixmap = XCreatePixmap (dpy,
                          DefaultRootWindow (dpy),
                          w, h,
                          32);

  gc = XCreateGC (dpy,
                  pixmap,
                  0,
                  &gc_values);

  XPutImage (dpy,
             pixmap,
             gc,
             image,
             0, 0,
             0, 0,
             w, h);

  XFreeGC (dpy, gc);
  XDestroyImage (image);

  if (width) *width = w;
  if (height) *height = h;
  if (depth) *depth = 32;

  return pixmap;
}
# endif /* USE_GDKPIXBUF */

/* each time the timeline animating the label completes, swap the direction */
static void
timeline_completed (ClutterTimeline *timeline,
                    gpointer         user_data)
{
  clutter_timeline_set_direction (timeline,
                                  !clutter_timeline_get_direction (timeline));
  clutter_timeline_start (timeline);
}

G_MODULE_EXPORT int
test_pixmap_main (int argc, char **argv)
{
#ifdef USE_GDKPIXBUF
  GOptionContext      *context;
  Display	      *xdpy;
  int		       screen;
  Window	       rootwin;
  ClutterActor        *group, *label, *stage, *tex;
  Pixmap               pixmap;
  const ClutterColor   gry = { 0x99, 0x99, 0x99, 0xFF };
  Window               win_remote;
  guint		       w, h, d;
  GC		       gc;
  ClutterTimeline     *timeline;
  ClutterAlpha	      *alpha;
  ClutterBehaviour    *depth_behavior;
  int		       i;
  int                  row_height;

  clutter_init (&argc, &argv);

  xdpy = clutter_x11_get_default_display ();
  XSynchronize (xdpy, True);

  context = g_option_context_new (" - test-pixmap options");
  g_option_context_add_main_entries (context, g_options, NULL);
  g_option_context_parse (context, &argc, &argv, NULL);

  pixmap = create_pixmap (&w, &h, &d);

  screen = DefaultScreen(xdpy);
  rootwin = RootWindow(xdpy, screen);
  win_remote = XCreateSimpleWindow (xdpy, DefaultRootWindow(xdpy),
				    0, 0, 200, 200,
				    0,
				    WhitePixel(xdpy, screen),
				    WhitePixel(xdpy, screen));

  XMapWindow (xdpy, win_remote);

  stage = clutter_stage_get_default ();
  clutter_actor_set_position (stage, 0, 150);
  clutter_stage_set_color (CLUTTER_STAGE (stage), &gry);

  timeline = clutter_timeline_new (5000);
  g_signal_connect (timeline,
                    "completed", G_CALLBACK (timeline_completed),
                    NULL);

  alpha = clutter_alpha_new_full (timeline, CLUTTER_LINEAR);
  depth_behavior = clutter_behaviour_depth_new (alpha, -2500, 400);

  group = clutter_group_new ();
  clutter_container_add_actor (CLUTTER_CONTAINER (stage), group);
  label = clutter_text_new_with_text ("fixed", "ClutterX11Texture (Window)");
  clutter_container_add_actor (CLUTTER_CONTAINER (group), label);
  tex = clutter_x11_texture_pixmap_new_with_window (win_remote);
  clutter_container_add_actor (CLUTTER_CONTAINER (group), tex);
  clutter_actor_set_position (tex, 0, 20);
  clutter_x11_texture_pixmap_set_automatic (CLUTTER_X11_TEXTURE_PIXMAP (tex),
					    TRUE);
  clutter_texture_set_filter_quality (CLUTTER_TEXTURE (tex),
				      CLUTTER_TEXTURE_QUALITY_HIGH);
  clutter_actor_set_position (group, 0, 0);
  clutter_behaviour_apply (depth_behavior, group);

#ifdef HAVE_CLUTTER_GLX
  /* a window with glx */
  if (!disable_glx)
    {
      group = clutter_group_new ();
      clutter_container_add_actor (CLUTTER_CONTAINER (stage), group);
      label = clutter_text_new_with_text ("fixed",
					   "ClutterGLXTexture (Window)");
      clutter_container_add_actor (CLUTTER_CONTAINER (group), label);
      tex = clutter_glx_texture_pixmap_new_with_window (win_remote);
      clutter_container_add_actor (CLUTTER_CONTAINER (group), tex);
      clutter_actor_set_position (tex, 0, 20);
      clutter_x11_texture_pixmap_set_automatic (CLUTTER_X11_TEXTURE_PIXMAP (tex),
						TRUE);
      clutter_texture_set_filter_quality (CLUTTER_TEXTURE (tex),
					  CLUTTER_TEXTURE_QUALITY_HIGH);
      clutter_actor_set_position (group,
				  clutter_actor_get_width (stage)
				  - clutter_actor_get_width (tex),
				  0);
      clutter_behaviour_apply (depth_behavior, group);

      if (!clutter_glx_texture_pixmap_using_extension (
				      CLUTTER_GLX_TEXTURE_PIXMAP (tex)))
	g_print ("NOTE: Using fallback path, not GLX TFP!\n");
    }
#endif /* HAVE_CLUTTER_GLX */

  row_height = clutter_actor_get_height (group);

  /* NB: We only draw on the window after being redirected, so we dont
   * have to worry about handling expose events... */
  gc = XCreateGC (xdpy, win_remote, 0, NULL);
  XSetForeground (xdpy, gc, BlackPixel (xdpy, screen));
  XSetLineAttributes(xdpy, gc, 5, LineSolid, CapButt, JoinMiter);

  for (i = 0; i < 10; i++)
    XDrawLine (xdpy, win_remote, gc, 0+i*20, 0, 10+i*20+i, 200);


  group = clutter_group_new ();
  clutter_container_add_actor (CLUTTER_CONTAINER (stage), group);
  label = clutter_text_new_with_text ("fixed", "ClutterX11Texture (Pixmap)");
  clutter_container_add_actor (CLUTTER_CONTAINER (group), label);
  tex = clutter_x11_texture_pixmap_new_with_pixmap (pixmap);
  clutter_container_add_actor (CLUTTER_CONTAINER (group), tex);
  clutter_actor_set_position (tex, 0, 20);
  clutter_texture_set_filter_quality (CLUTTER_TEXTURE (tex),
				      CLUTTER_TEXTURE_QUALITY_HIGH);
  /* oddly, the actor's size is 0 until it is realized, even though
     pixmap-height is set */
  clutter_actor_set_position (group, 0, row_height);
  clutter_behaviour_apply (depth_behavior, group);


  g_signal_connect (stage, "key-release-event",
                    G_CALLBACK (stage_key_release_cb), (gpointer)pixmap);
  g_signal_connect (stage, "button-press-event",
                    G_CALLBACK (stage_button_press_cb), (gpointer)pixmap);

  clutter_actor_show (stage);

  clutter_timeline_start (timeline);

  clutter_main ();
# endif /* USE_GDKPIXBUF */

  return EXIT_SUCCESS;
}

#else /* HAVE_CLUTTER_GLX */
int test_pixmap_main (int argc, char **argv) { return EXIT_SUCCESS; };
#endif /* HAVE_CLUTTER_GLX */