def __init__(self, filehandle):
old_pos = filehandle.tell()
filehandle.seek(0)
data = filehandle.read()
filehandle.seek(old_pos)
self._poppler = P.document_new_from_data(data)
def badge_png(ds):
"""
make a badge image based on real data
>>> badge_png(test_dataset())[1:4]
'PNG'
"""
# This is for badge_png preview image:
try: import poppler
except:
err_missing('Python-poppler library not installed; can\'t generate preview.')
try: from gtk.gdk import Pixbuf,COLORSPACE_RGB
except: err_missing( 'Library not installed: gtk.gdk; can\'t generate preview.')
######
# get pdf
pdf = mkpdf(ds,sample=True)
# render pdf onto pixbuf
pixbuf = Pixbuf(COLORSPACE_RGB,False,8,286,225)
doc = poppler.document_new_from_data(pdf,len(pdf),password='')
page0=doc.get_page(0)
page0.render_to_pixbuf(0,0,8,11,1,0,pixbuf)
# save pixbuf as png
# There has to be a better way to get the image?
lst=[]
pixbuf.save_to_callback(lambda b,l: l.append(b), 'png', user_data=lst)
png=''.join(lst)
return png
