gimp/libgimpwidgets/test-preview-area.c

/* LIBGIMP - The GIMP Library
 * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
 *
 * Copyright (C) 2004  Sven Neumann <sven@gimp.org>
 * test-preview-area.c
 *
 * 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.
 */

/* This code is based on testrgb.c from GTK+ - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 */

#include <config.h>

#include <stdlib.h>

#include <gtk/gtk.h>

#include "gimpwidgetstypes.h"

#include "gimppreviewarea.h"


#define WIDTH      256
#define HEIGHT     256
#define NUM_ITERS   50


static void
test_run (GtkWidget *area)
{
  guchar       *buf;
  gint          i, j;
  gint          offset;
  guchar        val;
  gdouble       start_time, total_time;
  GTimer       *timer;
  GEnumClass   *enum_class;
  GEnumValue   *enum_value;

  gtk_widget_realize (area);

  buf = g_malloc (WIDTH * HEIGHT * 8);

  val = 0;
  for (j = 0; j < WIDTH * HEIGHT * 8; j++)
    {
      val = (val + ((val + (rand () & 0xff)) >> 1)) >> 1;
      buf[j] = val;
    }

  gimp_preview_area_set_cmap (GIMP_PREVIEW_AREA (area), buf, 256);

  /* Let's warm up the cache, and also wait for the window manager
     to settle. */
  for (i = 0; i < NUM_ITERS; i++)
    {
      offset = (rand () % (WIDTH * HEIGHT * 4)) & -4;
      gimp_preview_area_draw (GIMP_PREVIEW_AREA (area),
                              0, 0, WIDTH, HEIGHT,
                              GIMP_RGB_IMAGE,
                              buf + offset,
                              WIDTH * 4);
    }

  gdk_window_process_all_updates ();

  timer = g_timer_new ();

  enum_class = g_type_class_ref (GIMP_TYPE_IMAGE_TYPE);

  for (enum_value = enum_class->values; enum_value->value_name; enum_value++)
    {
      start_time = g_timer_elapsed (timer, NULL);

      for (i = 0; i < NUM_ITERS; i++)
	{
	  offset = (rand () % (WIDTH * HEIGHT * 4)) & -4;
          gimp_preview_area_draw (GIMP_PREVIEW_AREA (area),
                                  0, 0, WIDTH, HEIGHT,
                                  enum_value->value,
                                  buf + offset,
                                  WIDTH * 4);

          gdk_window_process_updates (area->window, FALSE);
        }

      gdk_flush ();
      total_time = g_timer_elapsed (timer, NULL) - start_time;
      g_print ("%-16s "
               "time elapsed: %5.2fs, %8.1f fps, %8.2f megapixels/s\n",
	       enum_value->value_name,
	       total_time,
	       NUM_ITERS / total_time,
	       NUM_ITERS * (WIDTH * HEIGHT * 1e-6) / total_time);
    }
}

static void
test_preview_area (void)
{
  GtkWidget *window;
  GtkWidget *vbox;
  GtkWidget *button;
  GtkWidget *area;

  window = gtk_widget_new (GTK_TYPE_WINDOW,
			   "type",        GTK_WINDOW_TOPLEVEL,
			   "title",       "test-preview-area",
			   "allow_shrink", FALSE,
			   NULL);

  g_signal_connect (window, "destroy",
		    G_CALLBACK (gtk_main_quit), NULL);

  vbox = gtk_vbox_new (FALSE, 2);

  area = gimp_preview_area_new ();

  gtk_widget_set_size_request (area, WIDTH, HEIGHT);
  gtk_box_pack_start (GTK_BOX (vbox), area, FALSE, FALSE, 0);
  gtk_widget_show (area);

  button = gtk_button_new_from_stock (GTK_STOCK_CLOSE);
  gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
  g_signal_connect_swapped (button, "clicked",
			    G_CALLBACK (gtk_widget_destroy),
                            window);

  gtk_widget_show (button);

  gtk_container_add (GTK_CONTAINER (window), vbox);
  gtk_widget_show (vbox);

  gtk_widget_show (window);

  test_run (area);
}

int
main (int argc, char **argv)
{
  gtk_init (&argc, &argv);

  test_preview_area ();

  gtk_main ();

  return 0;
}