I'm down with that. I tried adding this to my pom: <dependency> <groupId>javax.media</groupId> <artifactId>jai_core</artifactId> <version>1.1.2_01</version> </dependency>
But I got this: Failed to resolve artifact. Missing: ---------- 1) javax.media:jai_core:jar:1.1.2_01 Anyone know how to pull this in via Maven? Chas. Derek Chen-Becker wrote: > If you use JAI there are three implementations: one is pure java code > and will run anywhere. There are two more versions that use JNI to > provide "optimized" versions of some of the ops. We found that using the > native (MMX, I think) code under Linux and Windows was significantly > slower (order of magnitude or more) than just using the impl without > native libraries. I can dig up timing results if you want, but for > something as simple as scaling I think it would be better to just use > the pure java version. > > Derek > > On Thu, Apr 16, 2009 at 3:08 PM, Charles F. Munat <[email protected] > <mailto:[email protected]>> wrote: > > > What do you mean by "pure java implementation" vs. "optimized native > code"? > > Chas. > > Derek Chen-Becker wrote: > > Yes, I take back my recommendation for it. I didn't realize just > how bad > > it was, but here's a good article on it: > > > > > > http://today.java.net/pub/a/today/2007/04/03/perils-of-image-getscaledinstance.html > > > > JAI works well, but adds a dependency. One note on performance: > We have > > found in our testing that the pure java impl of JAI actually > outperforms > > the "optimized" native code by quite a bit for most common operations > > like scaling, transforms, crops, etc. > > > > Derek > > > > On Thu, Apr 16, 2009 at 1:43 PM, Charles F. Munat <[email protected] > <mailto:[email protected]> > > <mailto:[email protected] <mailto:[email protected]>>> wrote: > > > > > > This is very helpful. I'm glad to hear that others are doing > this. I > > read, however, that getScaledInstance is slow. Probably not a > huge issue > > since uploaded images will be infrequent... > > > > Thanks for the help! > > > > Chas. > > > > Derek Chen-Becker wrote: > > > Jai or just Java2D would work. I use JAI a lot at work > (wrote a > > > large-scale image rendering and compositing application), > so if > > you run > > > into issues there just ask. JAI can be somewhat heavy if > you have > > > simple requirements, so you could also just use the > > > Image.getScaledInstance method, which is far simpler. For > example: > > > > > > import java.awt.{Image,Tookit} > > > > > > val imageData : Array[Byte] = ... > > > > > > val scaled = > > > > > > Toolkit.getDefaultToolkit.createImage(imageData).getScaledUInstace(width, > > > height, Image.SCALE_SMOOTH) > > > > > > The final param controls which algorithm to use for > scaling, so > > you can > > > use several as defined on the java.awt.Image class. > > > > > > Derek > > > > > > On Thu, Apr 16, 2009 at 5:59 AM, Alexander Kellett > > <[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>> > > > <mailto:[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>>>> wrote: > > > > > > > > > i used jai in the past, a quick google let me to > > > > > > > http://www.digitalsanctuary.com/tech-blog/java/how-to-resize-uploaded-images-using-java-better-way.html > > > > > > On Thu, Apr 16, 2009 at 11:10 AM, Jean-Luc > > <[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>> > > > <mailto:[email protected] > <mailto:[email protected]> <mailto:[email protected] > <mailto:[email protected]>>>> wrote: > > > > Imagemagick is said to be very efficient for image > processing. > > > > http://www.imagemagick.org/script/api.php#java > > > > > > > > If you develop with MacOSX, some people had some > compile > > issues > > > with JMagick > > > > and have prefered a more direct solution using "exec" : > > > > > > > > > > http://www.darcynorman.net/2005/03/15/jai-vs-imagemagick-image-resizing/ > > > > > > > > Jean-Luc > > > > > > > > > > > > 2009/4/16 Charles F. Munat <[email protected] > <mailto:[email protected]> > > <mailto:[email protected] <mailto:[email protected]>> > <mailto:[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>>>> > > > >> > > > >> The Georgia Association of Editors? That's good to > know. > > > >> > > > >> (Unfortunately, the app is already built and > running on > > my own > > > server > > > >> and I have no time to play with GAE right now. But I'm > > getting > > > more and > > > >> more curious about it.) > > > >> > > > >> It's funny. I would think that lots of people would be > > resizing > > > uploaded > > > >> images in Java, but I've asked this question > before and > > got nothing. > > > >> Ruby/Rails folks do this sort of thing all the > time with > > RMagick > > > (and > > > >> half a dozen other tools). What the heck do Java > > developers do? > > > >> > > > >> Thanks, Viktor! > > > >> > > > >> Chas. > > > >> > > > >> Viktor Klang wrote: > > > >> > > > > >> > > > > >> > On Thu, Apr 16, 2009 at 7:36 AM, Charles F. Munat > > > <[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>> > > <mailto:[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>>> > > > >> > <mailto:[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>> > > <mailto:[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>>>>> wrote: > > > >> > > > > >> > > > > >> > Has anyone here done anything with Lift in which > > uploaded > > > images are > > > >> > resized (or otherwise manipulated) before > saving? > > If so, > > > how did you > > > >> > do > > > >> > it? Any recommendations for libraries? > > > >> > > > > >> > > > > >> > GAE offers that kind of functionality. > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > Thanks! > > > >> > > > > >> > Chas. > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > -- > > > >> > Viktor Klang > > > >> > Senior Systems Analyst > > > >> > > > > >> > > > > > >> > > > >> > > > > > > > > > > > > > > > > -- > > > > Jean-Luc Canela > > > > [email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>> > > <mailto:[email protected] <mailto:[email protected]> > <mailto:[email protected] <mailto:[email protected]>>> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Lift" 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/liftweb?hl=en -~----------~----~----~----~------~----~------~--~---
