[Image-SIG] less disk IO
carl at personnelware.com
Thu Jan 3 00:32:05 CET 2008
I am trying to convert a pdf (data in string, not disk file) to a png. This
will be run in a django view on a server (PyCon's even) so it would be good if
it didn't hit the disk as much. Shouldn't I be able to use .tostring if I can
I gave up trying to convert the pdf. The things that might have actually worked
were not stable enough to be put onto the production server. If you think you
know a way, please code it first. If it takes you longer than 10 min, or more
than 100 words to describe the setup, it probably isn't going to get used :)
Also, I have been told about 10 times now that it should be easy. I agree. so
far no one has proved it.
""" make a sample badge"""
# this is some clunky code.
# it bounces the data off the disk more times than I care to count
# It would be nice if it was all done in memory,
# but I couldn't figure out how.
import PIL, Image
pdf = mkpdf(ds)
tempDir = tempfile.mkdtemp( prefix = "badgePreview_" )
pdfname = path.join( tempDir, 'badge.pdf' )
imgname = path.join( tempDir, 'badge.png' )
# convert pdf to some image format (uses ext to determine type)
system('convert %s %s' % (pdfname, imgname))
# crop the badge (pdf may be 8x11 page)
# I am sure there is a way to get the image out of im
# so that I don't have to send it back to the disk.
# img=im.tostring('raw') # The image x cannot be displayed, because it
# img=im.tostring('PNG') # encoder PNG not available
# img=im.tostring('png') # encoder png not available
img = open(imgname).read()
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