GNU bug report logs - #2548
23.0.60; doc-view: unexpected reuse of previously scaled image

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Markus Triska <markus.triska <at> gmx.at>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.60; doc-view: unexpected reuse of previously scaled image
Date: Tue,  3 Mar 2009 02:31:41 +0100 (CET)

With p.ps from:

   http://www.logic.at/prolog/p.ps

when I do:

   $ emacs -Q p.ps

and press:

   C-c C-c - - - - - - -

the image shrinks, as expected. Then, when I quit Emacs and again do:

   $ emacs -Q p.ps

followed by C-c C-c, doc-view unexpectedly shows the small version
from the previous run. When I then press "-", it "shrinks" the image
so that the result is in fact larger than the just displayed image.


In GNU Emacs 23.0.60.2 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
 of 2009-01-06 on mt-computer.local
Windowing system distributor `The XFree86 Project, Inc', version 11.0.40400000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Message #10 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Tassilo Horn <tassilo <at> member.fsf.org>
To: Markus Triska <markus.triska <at> gmx.at>
Cc: 2548-done <at> debbugs.gnu.org, emacs-pretest-bug <at> gnu.org
Subject: Re: bug#2548: 23.0.60; doc-view: unexpected reuse of previously scaled image
Date: Tue, 03 Mar 2009 12:54:34 +0100

Markus Triska <markus.triska <at> gmx.at> writes:

Hi Markus,

> With p.ps from:
>
>    http://www.logic.at/prolog/p.ps
>
> when I do:
>
>    $ emacs -Q p.ps
>
> and press:
>
>    C-c C-c - - - - - - -
>
> the image shrinks, as expected. Then, when I quit Emacs and again do:
>
>    $ emacs -Q p.ps
>
> followed by C-c C-c, doc-view unexpectedly shows the small version
> from the previous run.

That's no bug.  When you fire up emacs again doc-view uses the cached
files, which are the small ones now.

> When I then press "-", it "shrinks" the image so that the result is in
> fact larger than the just displayed image.

Yeah, cause the resulution factor is at the default value again and
doc-view reconverts the doc using this default value x 0.95 or so.

I'm closing that "bug".

Bye,
Tassilo

Message #20 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Markus Triska <markus.triska <at> gmx.at>
To: Tassilo Horn <tassilo <at> member.fsf.org>
Cc: 2548-done <at> debbugs.gnu.org, emacs-pretest-bug <at> gnu.org
Subject: Re: bug#2548: 23.0.60; doc-view: unexpected reuse of previously scaled image
Date: Wed, 04 Mar 2009 21:08:53 +0100

Tassilo Horn <tassilo <at> member.fsf.org> writes:

> the resulution factor is at the default value again and doc-view
> reconverts the doc using this default value x 0.95 or so.

If caching of the scaled picture is desired, the resolution factor
should be cached along with the image in my opinion, so that shrinking
and enlarging work consistently across different runs of Emacs.

Message #26 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Tassilo Horn <tassilo <at> member.fsf.org>
To: Markus Triska <markus.triska <at> gmx.at>
Cc: 2548-done <at> debbugs.gnu.org, emacs-pretest-bug <at> gnu.org
Subject: Re: bug#2548: 23.0.60; doc-view: unexpected reuse of previously scaled image
Date: Wed, 04 Mar 2009 21:41:17 +0100

Markus Triska <markus.triska <at> gmx.at> writes:

>> the resulution factor is at the default value again and doc-view
>> reconverts the doc using this default value x 0.95 or so.
>
> If caching of the scaled picture is desired, the resolution factor
> should be cached along with the image in my opinion, so that shrinking
> and enlarging work consistently across different runs of Emacs.

I agree.  I hope I can implement that at the weekend.

Bye,
Tassilo

Message #32 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Tassilo Horn <tassilo <at> member.fsf.org>
To: 2548 <at> debbugs.gnu.org
Cc: Markus Triska <markus.triska <at> gmx.at>, emacs-pretest-bug <at> gnu.org,
        2548-done <at> debbugs.gnu.org
Subject: Re: bug#2548: 23.0.60; doc-view: unexpected reuse of previously scaled image
Date: Thu, 05 Mar 2009 09:26:08 +0100

Tassilo Horn <tassilo <at> member.fsf.org> writes:

Hi Markus,

>>> the resulution factor is at the default value again and doc-view
>>> reconverts the doc using this default value x 0.95 or so.
>>
>> If caching of the scaled picture is desired, the resolution factor
>> should be cached along with the image in my opinion, so that
>> shrinking and enlarging work consistently across different runs of
>> Emacs.
>
> I agree.  I hope I can implement that at the weekend.

It's in CVS now.  I tested it briefly and it works fine for me.  Please
give it a try.

Bye,
Tassilo

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