bug#36427: docview wrong spacing

bug#36427: docview wrong spacing

[積丹尼 Dan Jacobson]

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.

bug#36427: docview wrong spacing

[Tassilo Horn]

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積丹尼 Dan Jacobson <jidanni@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:

[-- Attachment #2: docview-bug-36427.png --]
[-- Type: image/png, Size: 12633 bytes --]

[-- Attachment #3: Type: text/plain, Size: 185 bytes --]


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:

[-- Attachment #4: evince-bug-36427.png --]
[-- Type: image/png, Size: 8347 bytes --]

[-- Attachment #5: Type: text/plain, Size: 271 bytes --]


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

bug#36427: Bug#931701: Wrong letter spacing

[積丹尼 Dan Jacobson]

X-Debbugs-Cc: 36427@debbugs.gnu.org, Tassilo Horn <tsdh@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