/*

 *  Very simple program, that has been used by us

 *  (V. Babin <babin :at: users.sourceforge.net> and

 *   S. Kondrat <valiska :at: users.sourceforge.net>)

 *  during toying with libmng (http://www.libmng.com)

 *

 *  License: GPL :-))

 *

 *  7 July 2001:  added key-press/button-press handling to exit viewer without

 *                window-manager help; added libmng version info [Greg Roelofs]

 */

#include <unistd.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <errno.h>

#include <gtk/gtk.h>

#include "gtk-mng-view.h"

#define BLOCK_SIZE  4096

static guint

read_file (const gchar* file_name, guchar ** ptr)

{

  gint fd;

  guint size = 0;

  guint bytes_read = 0;

  if ((fd = open (file_name, O_RDONLY)) == -1)

    {

      perror (file_name);

      * ptr = NULL; 

      return 0;

    }

  * ptr = g_new (guchar, BLOCK_SIZE);

  while ((bytes_read = read (fd, * ptr + size, BLOCK_SIZE)))

    {

      size += bytes_read;

      * ptr = (guchar *) g_realloc (* ptr, size + BLOCK_SIZE);

    }

  close (fd);

  * ptr = (guchar *) g_realloc (* ptr, size);

  return size;

}

int

main (int argc, char ** argv)

{

  GtkMngView * mng_view;

  GtkWidget * window;

  GtkWidget * align;

  GtkWidget * frame;

  guchar * mng_data = NULL;

  guint mng_data_size;

  if (argc < 2)

    {

      g_print ("Usage:  %s <file.mng>\n\n", argv[0]);

      g_print ("   Compiled with GTK+ %d.%d.%d; using GTK+ %d.%d.%d.\n",

        GTK_MAJOR_VERSION, GTK_MINOR_VERSION, GTK_MICRO_VERSION,

        gtk_major_version, gtk_minor_version, gtk_micro_version);

#ifdef GDK_PIXBUF_VERSION

      g_print ("   Compiled with gdk-pixbuf %s; using gdk-pixbuf %s.\n",

        GDK_PIXBUF_VERSION, gdk_pixbuf_version);

#endif

      g_print ("   Compiled with libmng %s; using libmng %s.\n",

        MNG_VERSION_TEXT, mng_version_text());

      g_print ("   Compiled with zlib %s; using zlib %s.\n",

        ZLIB_VERSION, zlib_version);

#ifdef JPEG_LIB_VERSION

        {

          int major = JPEG_LIB_VERSION / 10;

          int minor = JPEG_LIB_VERSION % 10;

          char minoralpha[2];

          if (minor)

            {

              minoralpha[0] = (char)(minor - 1 + 'a');

              minoralpha[1] = '\0';

            }

          else

              minoralpha[0] = '\0';

          g_print ("   Compiled with libjpeg %d%s.\n", major, minoralpha);

        }

#endif

      g_print ("\nPress Esc or Q, or click mouse button, to quit.\n");

      return 1;

    }

  mng_data_size = read_file (* (argv + 1), &mng_data);

  if (mng_data == NULL)

    return 1;

  gtk_init (&argc, &argv);

  gdk_rgb_init ();

  gdk_rgb_set_verbose (TRUE);

  gtk_widget_set_default_visual (gdk_rgb_get_visual ());

  gtk_widget_set_default_colormap (gdk_rgb_get_cmap ());

  window = gtk_widget_new (GTK_TYPE_WINDOW,

			   "GtkWindow::type", GTK_WINDOW_TOPLEVEL,

			   "GtkWindow::title", "MNG animation",

			   "GtkContainer::border_width", 5,

			   NULL);

  gtk_signal_connect (GTK_OBJECT (window), "delete_event",

		      GTK_SIGNAL_FUNC (gtk_main_quit), NULL);

  gtk_signal_connect (GTK_OBJECT (window), "destroy",

		      GTK_SIGNAL_FUNC (gtk_main_quit), NULL);

  /* any keypress (e.g., Esc or Q) or mouse-button click will quit viewer */

  gtk_signal_connect (GTK_OBJECT (window), "key_press_event",

		      GTK_SIGNAL_FUNC (gtk_main_quit), NULL);

  gtk_widget_add_events(window, GDK_BUTTON_PRESS_MASK);

  gtk_signal_connect (GTK_OBJECT (window), "button_press_event",

		      GTK_SIGNAL_FUNC (gtk_main_quit), NULL);

  align = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);

  gtk_container_add (GTK_CONTAINER (window), align);

  frame = gtk_frame_new (NULL);

  gtk_container_add (GTK_CONTAINER (align), frame);

  /* actually it */

  mng_view = GTK_MNG_VIEW (gtk_mng_view_new ());

  gtk_container_add (GTK_CONTAINER (frame), GTK_WIDGET (mng_view));

  gtk_mng_view_load_mng_from_memory (mng_view, mng_data, mng_data_size);

  g_free (mng_data);

  /* rest in piece */

  gtk_widget_show_all (window);

  gtk_main ();

  return 0;

}