Re: Problem with GdkPixbuf

["richard boaz" <riboaz xs4all nl>]

And to answer your question:

The documentation for gtk_image_get_pixbuf() states:

The caller of this function does not own a reference to the returned pixbuf.

I.e., you cannot free a resource that's not yours, so the request fails.  The error message is unfortunate, it's not terribly accurate.

The code rewrite suggestion is the way to go.

richard

On 7/5/07, dashikugua 126 com <dashikugua 126 com> wrote:

 

Hi all:

    I'm using the Gtkimage and GdkPixbuf to show picture and each time I run the program I get the following error:

 

GLib-Gobject-CRITICAL ** : g_object_unref : assertion `G_IS_OBJECT(object)` failed

 

I'm running GTK 2.6.4 and Glib 2.6.4 on a Debian woody.Here is the code which reproduces the problem:

 

#include <gtk/gtk.h>

int main( int argc,
  char *argv[] )
{
  GtkWidget *window;
  GtkWidget *image;
  GdkPixbuf *pix1;

  GdkPixbuf *pix2;

  
  gtk_init(&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  image = gtk_image_new_from_file ("1.png");

  gtk_container_set_border_width (GTK_CONTAINER (window), 10);
  gtk_container_add (GTK_CONTAINER (window), image);

  pix1=gtk_image_get_pixbuf(GTK_IMAGE(image));

  pix2=gdk_pixbuf_scale_simple(pix1,320,160,GDK_INTERP_BILINEAR);

  gtk_image_set_from_pixbuf(GTK_IMAGE(image),pix2);

  g_object_unref(pix1);

  g_object_unref(pix2); 

 

  gtk_widget_show (image);
  gtk_widget_show (window);

  gtk_main ();

  return(0);
}

 

I have no idea how to resolve the problem.Any help will be most appreciated.Thanks.

 

 

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