Oh yeah, forgot about Google Apps Engine.
On Mon, 2009-06-29 at 11:31 -0700, mdipierro wrote:
> It is not pure python it is a binary library. As far as I know none of
> them runs on GAE.
>
> On Jun 29, 1:23 pm, Joe Barnhart <joe.barnh...@gmail.com> wrote:
> > Since PIL is all Python, do you suppose it's compatible with GAE?
> > That could give it a nod over ImageMagick in my mind.
> >
> > On Jun 29, 9:12 am, mdipierro <mdipie...@cs.depaul.edu> wrote:
> >
> > > Something like this could go in gluon.conrtib send me a patch when you
> > > have time.
> >
> > > On Jun 29, 10:39 am, cjparsons <cjparso...@yahoo.co.uk> wrote:
> >
> > > > I've had success with PIL to thumbnail uploaded images.
> >
> > > > In upload form handling:
> >
> > > > if form.accepts(request.vars,session):
> > > > if not form.vars.get("delete_this_record",False):
> > > > response.flash = "image accepted"
> > > > makeThumbnail(form.vars.id)
> > > > else:
> > > > response.flash = "image deleted"
> >
> > > > then the function to make the thumbnail. This might have less error
> > > > handling than you'd like. My images are in the db, the main image is
> > > > field 'image_blob' and the thumbnail, also a blob, 'thumbnail_data'.
> > > > If yours are in a file then the changes you'd need would actually make
> > > > the code simpler.
> >
> > > > THUMBNAILSIZE = 120
> >
> > > > def makeThumbnail(id):
> > > > import Image
> > > > import StringIO
> >
> > > > imgRecord = db.images[id]
> > > > if not imgRecord:
> > > > return None
> > > > imgData = Image.open(StringIO.StringIO
> > > > (imgRecord.image_blob)).convert("RGB")
> > > > imgData.thumbnail((THUMBNAILSIZE,THUMBNAILSIZE),Image.ANTIALIAS)
> > > > thumbFile = StringIO.StringIO()
> > > > imgData.save(thumbFile,"JPEG")
> > > > thumbFile.seek(0)
> > > > imgRecord.update_record(thumbnail_data=thumbFile.read())
> > > > db.commit()
> > > > return True
> >
> > > > From memory, the above will shrink the picture so the largest
> > > > dimension is THUMBNAILSIZE, and the aspect ratio is maintained - the
> > > > shorter dimension may be less than THUMBNAILSIZE if the image wasn't
> > > > square.
> >
> > > > From a different iteration of my code, the following will always give
> > > > you a square of dimensions xy by xy, without distorting the image, but
> > > > will crop the image if it wasn't already square.
> >
> > > > def makeThumbnail(blob, xy):
> > > > imgData = Image.open(StringIO.StringIO(blob)).convert("RGB")
> > > > # make sure thumbnails are square by cropping original to a
> > > > # square.
> > > > # Find the longest side
> > > > w,h = imgData.size
> > > > if w >= h:
> > > > voffset=0
> > > > hoffset=(w-h)/2
> > > > ex = h
> > > > else:
> > > > hoffset=0
> > > > voffset=(h-w)/2
> > > > ex = w
> > > > imgData = imgData.transform((xy,xy),Image.EXTENT,
> > > > (hoffset,voffset,hoffset+ex,voffset+ex),Image.BICUBIC)
> > > > thumbFile = StringIO.StringIO()
> > > > imgData.save(thumbFile,"JPEG")
> > > > thumbFile.seek(0)
> > > > return thumbFile
> >
> > > > Sorry if the speed I'm writing my reply, or the inelegance of my
> > > > implementation makes this post less than helpful.
> >
> > > > Chris
> >
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