Re: [Java-gnome-developer] Cairo - embedding images in pdfs

[Andrew C. <an...@op...>]

On Sat, 2010-02-06 at 10:52 +0000, William Temperley wrote:

> I've posted the VM crash dump here:
> http://pastebin.com/m7587cc22

The relevant part is:

Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [libpixbufloader-gif.so+0x1b76]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j  org.gnome.gdk.GdkPixbuf.gdk_pixbuf_new_from_file(Ljava/lang/String;)J+0
j  org.gnome.gdk.GdkPixbuf.createPixbufFromFile(Ljava/lang/String;)J+21
j  org.gnome.gdk.Pixbuf.checkPixbufFromFile(Ljava/lang/String;)J+44
j  org.gnome.gdk.Pixbuf.<init>(Ljava/lang/String;)V+2
j  uk.ac.ox.map.carto.canvas.CairoTest.main([Ljava/lang/String;)V+69
v  ~StubRoutines::call_stub

which is nothing unusual at all.


> I'm on a fairly standard Ubuntu Karmic AMD64 install - using Java-gnome-4.0.14.

Sure, that's fine.

(java-gnome from the PPA, I assume?)

> It just crashed when creating a pixbuf from a file. I was just doing a
> very simple trial of a few features:


> public class CairoTest {
> 	public static void main(String[] args) throws IOException {

You didn't call Gtk.init() first. That's obligatory.
http://java-gnome.sourceforge.net/4.0/doc/api/org/gnome/gtk/Gtk.html#init(java.lang.String[])

Annoyingly, not having done so should have resulted in an Exception
being thrown when you tried to use anything else in java-gnome.

We used to have some great code that would check you'd initialized
properly. Apparently we messed that up when we changed the
initialization last cycle to deal with the GLib g_set_prgname() bug.
http://article.gmane.org/gmane.comp.gnome.bindings.java.devel/1425
refers. Not sure why we aren't getting an Exception anymore. Someone
will need to fix that.

Anyway, call Gtk.init() and you're on your way.

AfC
Sydney