Re: Abend in gdk_pixbuf_new_from_file

[Viraj Chatterjee <vchatter adobe com>]

You are doing a gtk_widget_destroy, just before the pixbuf_new call. That
isn't required since you've anyway connected the clicked event with the
destroy function in your mytest function.

This may not be the solution, but it's possible the crash is actually
happening when the destroyed widget is being destroyed again.

-vc

----- Original Message ----- 
From: "Bryan Brown" <bbrown saltmine radix net>
To: <gtk-app-devel-list gnome org>
Sent: Thursday, February 26, 2004 6:45 PM
Subject: Abend in gdk_pixbuf_new_from_file


> Hello,
>
> My application (built using gtk 2.x under Redhat 9) sets up a file
> selection dialog, waits for the user to select a file, then tries to read
> the specified file into a pixbuf.
>
> It's abending with a segmentation fault when it calls
> gdk_pixbuf_new_from_file, the user having selected a standard
> png-formatted picture file.
>
> Here's a snippet of the relevant code:
>
> ===== begin code snip =====
>
> GtkWidget *file_selector;
> gchar     *filename;
>
> [snip]
>
> void
> on_read_ok_button_clicked (GtkButton *button,
>                            gpointer  user_data)
> {
>    gchar filename_local[BUFLEN] = "\0";
>    GError *error;
>    GdkPixbuf *pixbuf = NULL;
>
> [snip]
>
>    filename = (gchar *) gtk_file_selection_get_filename (
>                GTK_FILE_SELECTION (file_selector));
>
> [snip length checking]
>
>    strcpy (filename_local, filename);
>    gtk_widget_destroy (file_selector);
>
>    pixbuf = gdk_pixbuf_new_from_file (filename_local,
>                                       &error);
>
>
> [snip]
>
> void mytest ()
>
> {
>
> [snip]
>
>    file_selector = gtk_file_selection_new ("Select an input file");
>
>    g_signal_connect (
>       GTK_OBJECT (GTK_FILE_SELECTION (file_selector)->ok_button),
>       "clicked",
>       G_CALLBACK (on_read_ok_button_clicked),
>       NULL);
>    g_signal_connect_swapped (
>       GTK_OBJECT (GTK_FILE_SELECTION (file_selector)->ok_button),
>       "clicked",
>       G_CALLBACK (gtk_widget_destroy),
>      (gpointer) file_selector);
>    g_signal_connect_swapped (
>       GTK_OBJECT (GTK_FILE_SELECTION (file_selector)->cancel_button),
>       "clicked",
>       G_CALLBACK (gtk_widget_destroy),
>       (gpointer) file_selector);
>    gtk_widget_show (file_selector);
> }
>
> ===== end code snip =====
>
> From debug printf statements I know that it's terminating in the call to
> gdk_pixbuf_new_from_file(-).  The file it's attempting to load is a ".png"
> formatted picture file built by gdk_pixbuf_save, and which displays fine
> in other standalone utilities.
>
> Any helpful ideas about what I'm doing wrong here?
>
> Thanks,
>
> Bryan
>
>
> *---------------------------------------------------------------
> * Bryan Brown      <*>              bbrown radix net
> * http://www.radix.net/~bbrown
> *---------------------------------------------------------------
>
>
>
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