gtk/demos/testpixbuf.c

/* testpixbuf -- test program for gdk-pixbuf code
 * Copyright (C) 1999 Mark Crichton, Larry Ewing
 *
 * 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 <stdlib.h>
#include <unistd.h>
#include <string.h>

#include <gtk/gtk.h>
#include "gdk-pixbuf.h"

static void
quit_func (GtkWidget *widget, gpointer dummy)
{
  gtk_main_quit ();
}

expose_func (GtkWidget *drawing_area, GdkEventExpose *event, gpointer data)
{
  GdkPixBuf *pixbuf;
  gint x1, y1, x2, y2;

  pixbuf = (GdkPixBuf *)gtk_object_get_data(GTK_OBJECT(drawing_area), "pixbuf");

  if (pixbuf->art_pixbuf->has_alpha){
    gdk_draw_rgb_32_image (drawing_area->window,
			   drawing_area->style->black_gc,
			   event->area.x, event->area.y, 
			   event->area.width, 
			   event->area.height,
			   GDK_RGB_DITHER_MAX, 
			   pixbuf->art_pixbuf->pixels 
			   + (event->area.y * pixbuf->art_pixbuf->rowstride) 
			   + (event->area.x * pixbuf->art_pixbuf->n_channels),
			   pixbuf->art_pixbuf->rowstride);
  }else{
    gdk_draw_rgb_image (drawing_area->window,
			drawing_area->style->white_gc,
			event->area.x, event->area.y, 
			event->area.width, 
			event->area.height,
			GDK_RGB_DITHER_NORMAL,
			pixbuf->art_pixbuf->pixels 
			+ (event->area.y * pixbuf->art_pixbuf->rowstride) 
			+ (event->area.x * pixbuf->art_pixbuf->n_channels),
			pixbuf->art_pixbuf->rowstride);
  }
}  

config_func (GtkWidget *drawing_area, GdkEventConfigure *event, gpointer data)
{
    GdkPixBuf *pixbuf, *spb;
    
    pixbuf = (GdkPixBuf *)gtk_object_get_data(GTK_OBJECT(drawing_area), "pixbuf");

    g_print("X:%d Y:%d\n", event->width, event->height);

    if (((event->width) != (pixbuf->art_pixbuf->width)) ||
	((event->height) != (pixbuf->art_pixbuf->height))) 
        gdk_pixbuf_scale(pixbuf, event->width, event->height);

}

void
new_testrgb_window (GdkPixBuf *pixbuf)
{
  GtkWidget *window;
  GtkWidget *vbox;
  GtkWidget *button;
  GtkWidget *drawing_area;
  gint w, h;
 
  w = pixbuf->art_pixbuf->width;
  h = pixbuf->art_pixbuf->height;

  window = gtk_widget_new (gtk_window_get_type (),
			   "GtkObject::user_data", NULL,
			   "GtkWindow::type", GTK_WINDOW_TOPLEVEL,
			   "GtkWindow::title", "testrgb",
			   "GtkWindow::allow_shrink", TRUE,
			   NULL);
  gtk_signal_connect (GTK_OBJECT (window), "destroy",
		      (GtkSignalFunc) quit_func, NULL);

  vbox = gtk_vbox_new (FALSE, 0);

  drawing_area = gtk_drawing_area_new ();

  gtk_drawing_area_size (GTK_DRAWING_AREA(drawing_area), w, h);
  gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);

  gtk_signal_connect (GTK_OBJECT(drawing_area), "expose_event",
		      GTK_SIGNAL_FUNC(expose_func), NULL);
  gtk_signal_connect (GTK_OBJECT(drawing_area), "configure_event",
		      GTK_SIGNAL_FUNC (config_func), NULL);

  gtk_object_set_data (GTK_OBJECT(drawing_area), "pixbuf", pixbuf);

  gtk_widget_show (drawing_area);

  button = gtk_button_new_with_label ("Quit");
  gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
  gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
			     (GtkSignalFunc) gtk_widget_destroy,
			     GTK_OBJECT (window));

  gtk_widget_show (button);

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

  gtk_widget_show (window);
}

int
main (int argc, char **argv)
{
  int i;
  int found_valid = FALSE; 

  GdkPixBuf *pixbuf;

  gtk_init (&argc, &argv);

  gdk_rgb_set_verbose (TRUE);

  gdk_rgb_init ();

  gtk_widget_set_default_colormap (gdk_rgb_get_cmap ());
  gtk_widget_set_default_visual (gdk_rgb_get_visual ());

  i = 1;
  for (i = 1; i < argc; i++)
    {
      pixbuf = gdk_pixbuf_load_image (argv[i]);
      pixbuf = gdk_pixbuf_rotate(pixbuf, 42.0);
      
      if (pixbuf)
	{
	  new_testrgb_window (pixbuf);
	  found_valid = TRUE;
	}
    }

  if (found_valid)
    gtk_main ();

  return 0;
}