Is this a bug in the PDF/SVG backends or am I doing something wrong? If the
former is there any workaround?
The simple testcase below demonstrates the problem whereby the watermark doesn't
show up in the pdf output but does in the png output.
import Image
from scipy import lena
from scipy.ndimage import map_coordinates
from cStringIO import StringIO
def add_watermark(fig, watermark):
import matplotlib.image as image
im = image.imread(watermark)
dpi = fig.get_dpi()
offset = dpi*fig.get_size_inches()[0] - im.shape[1]
fig.figimage(im, offset, 0, alpha=0.3)
return fig
#
im = Image.fromarray(map_coordinates(lena(), mgrid[0:512:100j, 0:512:100j]))
watermark = StringIO()
im.save(watermark, format='png')
watermark.seek(0)
fig = figure(figsize=(12, 8))
plot(randn(1000))
add_watermark(fig, watermark)
fig.savefig('test.png', dpi=fig.get_dpi())
fig.savefig('test.pdf', dpi=fig.get_dpi())
Thanks,
Dave
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