"Rouben Rostamian" <[EMAIL PROTECTED]> writes:
> Dan Espen <[EMAIL PROTECTED]> wrote:
> > "Rouben Rostamian" <[EMAIL PROTECTED]> writes:
> > > --- xli (or its alias xsetbg) -------
> > > 
> > > Advantages:
> > > 
> > >   o very fast
> > >   o handles transparency
> > >   o smooth background image transition without screen blanking
> > > 
> > > Disadvantages:
> > > 
> > >   o does not recognize pgm, xpm, xbm, ...
> > >   o too fussy; does not recognize certain types of jpg images
> > 
> > I'm guessing you have progressive jpgs.  I think you will be able
> > to find a patch to fix that.
> 
> I don't know what a progressive jpeg is.  I will have to look it up.
> But here is an example of what I get:
> 
> % file ciscosplace.jpg
> ciscosplace.jpg: JPEG image data, JFIF standard 1.01, resolution (DPI), 96 x 
> 96
> 
> % xli ciscosplace.jpg
> jpegLoad: ciscosplace.jpg - Unsupported SOF marker type 0xc2
> ciscosplace.jpg: unknown or unsupported image type
> 
> Other viewers have no difficulty in displaying the image.
> 
> I have several other jpeg files with the same problem.

Yep.  Thats what I got until I applied the progressive jpg patch.
See if you can find it with Google.  The one I have is too old
to share.  (Nov 2001).

> > >   o poor quality smoothing
> > 
> > I find -sm works pretty well.
> 
> The -smooth option merely blurs the image.  Applying -smooth multiple
> times, as the man page suggests, makes it even worse.  A side-by-side
> comparison with what xv does with scaled images can be quite striking.

OK.

> > >   o buggy: "xsetbg -fillscreen file.jpg" doesn't fill screen for some ima
> ges
> > 
> > Depends on the image size, some need -fill, others need -full.
> 
> You are right.  But it is not clear which images need which option.
> I experimented with images of varying aspect ratios, but gave up at
> the end.

You might be able to figure it out programmatically,
by using convert to get the width/height but
I actually keep a file of commands, each image is displayed
with a hand tuned command.

> My apologies for this off-topic discussion.

Background image techniques are discussed every so often on this
list.  I think it fits in.

-- 
Dan Espen                           E-mail: [EMAIL PROTECTED]
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