GNU bug report logs - #36427
docview wrong spacing

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
To: bug-gnu-emacs <at> gnu.org
Subject: docview wrong spacing
Date: Sat, 29 Jun 2019 08:56:50 +0800

Something's wrong with docview.

Install libpdf-api2-perl debian package.

Run this perl script,

use PDF::API2;
$pdf = PDF::API2->new();
$page = $pdf->page();
$page->mediabox('Letter');
$text = $page->text();
$font = $pdf->cjkfont('traditional'); #something the matter when I use that
$text->font( $font, 20 );
$text->translate( 200, 700 );
$text->text(join "", 'A'..'Z');
$pdf->saveas('new.pdf');

Then do v (runs the command dired-view-file) on new.pdf.

See the bad spacing e.g., around the I?
Looks fine in Firefox and chromium.

Message #10 received at 36427-close <at> debbugs.gnu.org (full text, mbox):

From: Tassilo Horn <tsdh <at> gnu.org>
To: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
Cc: 36427-close <at> debbugs.gnu.org
Subject: Re: bug#36427: docview wrong spacing
Date: Sun, 07 Jul 2019 09:53:59 +0200

[Message part 1 (text/plain, inline)]

積丹尼 Dan Jacobson <jidanni <at> jidanni.org> writes:

Hi Dan,

> Something's wrong with docview.
>
> Install libpdf-api2-perl debian package.
>
> Run this perl script,
>
> use PDF::API2;
> $pdf = PDF::API2->new();
> $page = $pdf->page();
> $page->mediabox('Letter');
> $text = $page->text();
> $font = $pdf->cjkfont('traditional'); #something the matter when I use that
> $text->font( $font, 20 );
> $text->translate( 200, 700 );
> $text->text(join "", 'A'..'Z');
> $pdf->saveas('new.pdf');
>
> Then do v (runs the command dired-view-file) on new.pdf.
> See the bad spacing e.g., around the I?
> Looks fine in Firefox and chromium.

That's what it looks like on my (Arch GNU/Linux) machine:

[docview-bug-36427.png (image/png, inline)]

[Message part 3 (text/plain, inline)]

So for me, the space after J and T seem to be a bit larger than after
the other letters.  However, when viewed with Evince (the GNOME document
viewer), it looks exactly the same, see:

[evince-bug-36427.png (image/png, inline)]

[Message part 5 (text/plain, inline)]

I think what you describe is some font rendering issue with GhostScript
or mupdf (whatever doc-view uses on your machine to produce images from
the PDF), e.g., some suitable font, and there's nothing doc-view itself
could do here.

I'm closing this issue.

Bye,
Tassilo

Message #13 received at 36427 <at> debbugs.gnu.org (full text, mbox):

From: 積丹尼 Dan Jacobson
 <jidanni <at> jidanni.org>
To: submit <at> bugs.debian.org
Subject: Bug#931701: Wrong letter spacing
Date: Tue, 09 Jul 2019 19:32:40 +0800

X-Debbugs-Cc: 36427 <at> debbugs.gnu.org, Tassilo Horn <tsdh <at> gnu.org>
Package: ghostscript
Version: 9.27~dfsg-2
Severity: minor

There is wrong letter spacing. Please see
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36427

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