Re: [Tracker] [PATCH] tracker needs imagemagick

[Erlend Davidson <E R M Davidson sms ed ac uk>]

Erlend Davidson wrote:
> Jamie McCracken wrote:
>   
> > Michael Biebl wrote:
> >   
> >     
> > > 2007/1/10, Saleem Abdulrasool <compnerd gentoo org>:
> > >     
> > >       
> > > > Hi.
> > > >
> > > > While trying to come up with a patch for the thumbnailer, I noticed that
> > > > the image thumbnailing makes use of 'convert'.  This utility is actually
> > > > provided by imagemagick.  The attached patch adds in a check for
> > > > imagemagick (>=5.2.1) so that this dependency can also be tracked.
> > > >       
> > > >         
> > > imagemagick is an (optional) runtime dependency, only needed if
> > > thumbnailing is activated (which isn't by default), it's not a build
> > > dependency. So imho I think it should *not* be added as a configure
> > > check.
> > > It would be a good idea though to add imagemagick to "Additional
> > > recommended packages" in the README file. With the remark that it is
> > > needed for creating thumbnails (as is evince-thumbnailer, so evince
> > > should be added to that list, too)
> > >       
> Actually, I noticed that evince-thumbnailer is quite slow compared to 
> ImageMagick's 'convert'.  You can just use:
> $ convert "pdf:inputfile.pdf[0]" -scale 128x128 "png:outfile.png"
> and it's much quicker (plus it removes the dependency on gnome - you 
> already have imagemagick).  Convert also generates much nicer looking 
> image.  The [0] is just to make sure it only converts the first page, 
> and not the whole document.
Also, you can trim about 30% off the time convert takes by using 
-antialias to turn off antialiasing... you don't really notice it at 
small sizes with photots, not sure about pdfs.