http://code.google.com/intl/nl-NL/appengine/docs/python/images/installingPIL.html
On Mon, Jun 29, 2009 at 8:31 PM, mdipierro<[email protected]> 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 <[email protected]> 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 <[email protected]> wrote: >> >> > Something like this could go in gluon.conrtib send me a patch when you >> > have time. >> >> > On Jun 29, 10:39 am, cjparsons <[email protected]> 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 > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py Web Framework" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
