2012/2/15 Fred Kiefer <[email protected]>: > During FOSDEM Richard and I discussed the usage of filter services for image > conversion in gui. This is an old topic and I was always to lazy to > implement it. With Eric's image converter with Ghostscript and Imagemagik > there was finally more than enough reason to do it. It turned out that the > code in NSImageRep to support this was easy to write. Richard just had to > rewrite DO for the filter service, which had been corrupted a few years > back, and things were working. Or rather more or less so. > I used Ink as my test platform and inserted a PS file into a document, > getting its image converted to tiff on the way. It turns out that > NSLayoutManager cannot handle attachments as the last character. I couldn't > find the reason for that up to now. My example service was just a shell > script using Ghostscript, here the problem was that Ghostscript when used > with an output pipe cannot produce correct tiff images readable with > GNUstep. Richard came up with the idea to write into a temporary file and > pipe this back via cat. Next there was a problem converting the black image > that GS produced into RGB, which I managed to track down today. Still there > are tiff images that get displayed correctly as attachments in Ink and > others that wont. > > So apart from these little issues filter services are working now for > images! > > How to test it: > All you need is a filter program and a service .plist. Attached you will > find the ones I am using to test things. You will need to adjust the path to > the gs.sh shell script. > That we use NSTypedFileContentsPboardType:tiff instead of NSTIFFPboardType > is due to a limitation in the code that converts between file types and > pasteboard types. We should fix that or rather move on to UTI. > > The next step would be to write similar support for pasteboard type > filtering and then to add the same code in NSSound and NSMovie. Add a proper > filter service for ImageMagik (this one would not be a shell script but > rather a DO application). And of course to fix all the issues listed above. > > Hope you have fun with filter services,
That's super cool :) -- Nicolas Roard "I love deadlines. I like the whooshing sound they make as they fly by." -- Douglas Adams _______________________________________________ Gnustep-dev mailing list [email protected] https://lists.gnu.org/mailman/listinfo/gnustep-dev
