image handling (thumbnails)
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image handling (thumbnails)
 
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Hi--
what's the recommended / popular way of doing basic image handling in Seaside? My requirements are to take uploaded images and make thumbnails in a few different sizes. I see some references so SMagick and to Smalltalk-local image handling around, but I'm wondering what general practice is among posters on this list.
thanks Tiarnán
The law, in its majestic equality, forbids the rich as well as the poor to sleep under bridges, to beg in the streets, and to steal bread -- Anatole France _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
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Smagick works well but beware that it blocks the VM when processing an
image. For Wapict (images are sometimes ~50mb), I simply have an external queue with workers using OSProcess to convert images. Not terribly efficient but works well enough. To generate thumbnails of, say, profile pictures on a website, I don't really know what I would use. Have you found any pure-smalltalk image manipulation library? On 25/09/12 08:42, Tiarnán Ó Corráin wrote: > Hi-- > > what's the recommended / popular way of doing basic image handling in > Seaside? My requirements are to take uploaded images and make > thumbnails in a few different sizes. I see some references so SMagick > and to Smalltalk-local image handling around, but I'm wondering what > general practice is among posters on this list. > > thanks > > Tiarnán > > -- > The law, in its majestic equality, forbids the rich as well as the poor > to sleep under bridges, to beg in the streets, and to steal bread -- > Anatole France > > > _______________________________________________ > seaside mailing list > [hidden email] > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside > -- http://tulipemoutarde.be CA: +1 778 558 3225 BE: +32 65 709 131 _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
Re: image handling (thumbnails)
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Hi--
that sounds very interesting. Could you post some example code, or even a skeleton? thanks Tiarnán
On Tue, Sep 25, 2012 at 6:20 PM, Francois Stephany <[hidden email]> wrote: Smagick works well but beware that it blocks the VM when processing an image. The law, in its majestic equality, forbids the rich as well as the poor to sleep under bridges, to beg in the streets, and to steal bread -- Anatole France _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
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My OSProcess call is pretty stupid actually. It's something along the line:
env := OSProcess thisOSProcess environment copy. path := (env at: #PATH), ':/usr/local/bin/:/usr/bin/'. env at: #PATH put: path. pipe := (PipeableOSProcess command: command environment: env). pipe output. pipe closePipes. where the command is the imagemagick command as you would use it from the command line. I think SMagick does the same kind of thing but have a nice Smalltalk wrapper around. On 25/09/12 11:39, Tiarnán Ó Corráin wrote: > Hi-- > > that sounds very interesting. Could you post some example code, or even > a skeleton? > > thanks > > Tiarnán > > On Tue, Sep 25, 2012 at 6:20 PM, Francois Stephany > <[hidden email] <mailto:[hidden email]>> wrote: > > Smagick works well but beware that it blocks the VM when processing > an image. > > For Wapict (images are sometimes ~50mb), I simply have an external > queue with workers using OSProcess to convert images. Not terribly > efficient but works well enough. > > To generate thumbnails of, say, profile pictures on a website, I > don't really know what I would use. Have you found any > pure-smalltalk image manipulation library? > > > > > On 25/09/12 08:42, Tiarnán Ó Corráin wrote: > > Hi-- > > what's the recommended / popular way of doing basic image > handling in > Seaside? My requirements are to take uploaded images and make > thumbnails in a few different sizes. I see some references so > SMagick > and to Smalltalk-local image handling around, but I'm wondering what > general practice is among posters on this list. > > thanks > > Tiarnán > > -- > The law, in its majestic equality, forbids the rich as well as > the poor > to sleep under bridges, to beg in the streets, and to steal bread -- > Anatole France > > > _________________________________________________ > seaside mailing list > [hidden email] > <mailto:[hidden email]> > http://lists.squeakfoundation.__org/cgi-bin/mailman/listinfo/__seaside > <http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside> > > > -- > http://tulipemoutarde.be > CA: +1 778 558 3225 <tel:%2B1%20778%20558%203225> > BE: +32 65 709 131 <tel:%2B32%2065%20709%20131> > _________________________________________________ > seaside mailing list > [hidden email] > <mailto:[hidden email]> > http://lists.squeakfoundation.__org/cgi-bin/mailman/listinfo/__seaside > <http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside> > > > > > -- > The law, in its majestic equality, forbids the rich as well as the poor > to sleep under bridges, to beg in the streets, and to steal bread -- > Anatole France > > > _______________________________________________ > seaside mailing list > [hidden email] > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside > -- http://tulipemoutarde.be CA: +1 778 558 3225 BE: +32 65 709 131 _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
RE: image handling (thumbnails)
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In reply to this post by Tiarnán Ó Corráin
Here's some random code I have from an unfinished project a couple years ago. Not sure how useful it is.
" accepts PNGs only " (picture isNil not) ifTrue: [ aForm := (PNGReadWriter createAFormFrom: picture contents) first. " create avatar and save under name avatarBlahblahPng " thumbnail := PNGReadWriter on: (RWBinaryOrTextStream on: ''). thumbnail nextPutImage: (aForm scaledToSize: (Point x: 75 y: 75)). UGFileLibrary addFileNamed: 'avatar', user username, 'Png' contents: thumbnail contents. RS Date: Tue, 25 Sep 2012 19:39:27 +0100 Subject: Re: [Seaside] image handling (thumbnails) From: [hidden email] To: [hidden email] Hi-- that sounds very interesting. Could you post some example code, or even a skeleton? thanks Tiarnán
On Tue, Sep 25, 2012 at 6:20 PM, Francois Stephany <[hidden email]> wrote: Smagick works well but beware that it blocks the VM when processing an image. The law, in its majestic equality, forbids the rich as well as the poor to sleep under bridges, to beg in the streets, and to steal bread -- Anatole France _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
Re: image handling (thumbnails)
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Hi--
thanks to Robert and Francois for the excellent tips. I have a working solution now. Looks like Pharo's image handling capabilities are sufficient for my purposes. regards
Tiarnán _______________________________________________ seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
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This might interests you:
http://articles.tulipemoutarde.be/seaside-wrapper-for-filepickerio If you upload images, Filepicker.io have a nice way to get them resized/watermarked/whatever. It is not in my wrapper (yet) but I can add it if you need... Francois On 26/09/12 06:05, Tiarnán Ó Corráin wrote: > Hi-- > > thanks to Robert and Francois for the excellent tips. I have a working > solution now. Looks like Pharo's image handling capabilities are > sufficient for my purposes. > > regards > > Tiarnán > seaside mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside |
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