Hi matplotlib-users,
I decided to try to make some plots that I have previously made in png
format using the Agg backend in jpeg format using the GTKAgg backend
(which I guess is the one I should use for this). Unfortunately my
script exits with an error. I have therefore created a simple test
script (test.py) that illustrates the problem (at least on my
computer):
import matplotlib
from matplotlib.backends.backend_gtkagg import FigureCanvasGTKAgg as
FigureCanvas
fig = matplotlib.figure.Figure(dpi=100)
canvas = FigureCanvas(fig)
fig.savefig('test.jpg')
When I run it I get:
$ python test.py
/usr/lib/python2.5/site-packages/matplotlib/backends/backend_gtk.py:357:
GtkWarning: gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED
(widget) || GTK_IS_INVISIBLE (widget)' failed
gtk.DrawingArea.realize(self)
/usr/lib/python2.5/site-packages/matplotlib/backends/backend_gtk.py:360:
GtkWarning: gdk_pixmap_new: assertion `(drawable != NULL) || (depth !=
-1)' failed
pixmap = gdk.Pixmap (self.window, width, height)
Traceback (most recent call last):
File "test.py", line 6, in <module>
fig.savefig('test.jpg')
File "/usr/lib/python2.5/site-packages/matplotlib/figure.py", line
964, in savefig
self.canvas.print_figure(*args, **kwargs)
File "/usr/lib/python2.5/site-packages/matplotlib/backend_bases.py",
line 1310, in print_figure
**kwargs)
File "/usr/lib/python2.5/site-packages/matplotlib/backends/backend_gtk.py",
line 347, in print_jpeg
return self._print_image(filename, 'jpeg')
File "/usr/lib/python2.5/site-packages/matplotlib/backends/backend_gtk.py",
line 360, in _print_image
pixmap = gdk.Pixmap (self.window, width, height)
RuntimeError: could not create GdkPixmap object
I am using matplotlib 0.98.3, pygtk 2.14.0. My system is a Linux Ubuntu:
$ uname -a
Linux <blanket out> #1 SMP Wed Aug 20 18:39:13 UTC 2008 i686 GNU/Linux
Does anyone know what is wrong?
Best regards,
Jesper
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