[Dillo-dev] Underscores not drawn in pre with background color
Alexander Voigt
I stumbled upon a page with a lot of code snippets wrapped in a <pre>
block, where Dillo seems to have a rendering problem: Underscores `_'
are not drawn. I stripped down this real-world-example to the
attached minimal html file which reproduces the problem:
The page should render as follows:
============================================
softpoint_with_block() {
{ echo ""; } | ./softpoint.x leshouches
}
============================================
However, in the development version of Dillo it renders as follows:
============================================
softpoint with block() {
{ echo ""; } | ./softpoint.x leshouches
}
============================================
As you can see, the underscores in the function softpoint_with_block()
are not drawn in Dillo.
However, the underscores are drawn correcty if you
* remove the style="..." specification from the <pre> block or
* remove the line
{ echo ""; } | ./softpoint.x leshouches
from the <pre> block content.
Best regards,
Alex
Jorge Arellano Cid
The attached example renders OK here.
Maybe someone else can reproduce it.
--
Cheers
Jorge.-
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Alexander Voigt
then maybe it is an FLTK issue? I'm using
Debian Jessie GNU/Linux 4.6.0-0.bpo.1-amd64
FLTK 1.3.1
Best regards,
Alex
John Found
Alexander Voigt <Hole.de...@gmx.de> wrote:
>
> then maybe it is an FLTK issue? I'm using
>
> Debian Jessie GNU/Linux 4.6.0-0.bpo.1-amd64
> FLTK 1.3.1
>
> Best regards,
> Alex
>
IMHO, this is somehow related to the default fonts set in dillorc or
the global set system fonts.
--
http://fresh.flatassembler.net
http://asm32.info
John Found <john...@asm32.info>
Jorge Arellano Cid
> On Fri, 22 Jul 2016 10:17:38 +0200
> Alexander Voigt <Hole.de...@gmx.de> wrote:
>
> >
> > then maybe it is an FLTK issue? I'm using
> >
> > Debian Jessie GNU/Linux 4.6.0-0.bpo.1-amd64
> > FLTK 1.3.1
> >
> > Best regards,
> > Alex
> >
>
> IMHO, this is somehow related to the default fonts set in dillorc or
> the global set system fonts.
+1
A wild shot, but a cheap one, so I'd also try that first. Change your
default font to something else and see what happens.
Also check FLTK's test programs (IIRC there's a symbols one, and another
that's useful to try fonts).
If FLTK also has problems check the video driver (older kernel,
older/different video driver, GRUB CLI parameter).
Alexander Voigt
> > the global set system fonts.
>
> +1
>
> A wild shot, but a cheap one, so I'd also try that first. Change your
> default font to something else and see what happens.
>
> Also check FLTK's test programs (IIRC there's a symbols one, and another
> that's useful to try fonts).
>
> If FLTK also has problems check the video driver (older kernel,
> older/different video driver, GRUB CLI parameter).
I have not set any specific font in dillorc, so the default setting is
used. However, when I change the monospace font to
font_monospace="Monospace"
then the rendering problem disappears and the underscores are
correctly displayed. When I change to
font_monospace="DejaVu Sans Mono"
the rendering problem is present, i.e. the underscores are not
displayed.
Best regards,
Alex
On Fri, Jul 22, 2016 at 11:43:14AM -0400, Jorge Arellano Cid wrote:
> On Fri, Jul 22, 2016 at 06:19:21PM +0300, John Found wrote:
> > On Fri, 22 Jul 2016 10:17:38 +0200
> > Alexander Voigt <Hole.de...@gmx.de> wrote:
> >
> > >
> > > then maybe it is an FLTK issue? I'm using
> > >
> > > Debian Jessie GNU/Linux 4.6.0-0.bpo.1-amd64
> > > FLTK 1.3.1
> > >
> > > Best regards,
> > > Alex
> > >
> >
> > IMHO, this is somehow related to the default fonts set in dillorc or
> > the global set system fonts.
>
> +1
>
> A wild shot, but a cheap one, so I'd also try that first. Change your
> default font to something else and see what happens.
>
> Also check FLTK's test programs (IIRC there's a symbols one, and another
> that's useful to try fonts).
>
> If FLTK also has problems check the video driver (older kernel,
> older/different video driver, GRUB CLI parameter).
_______________________________________________
John Found
Alexander Voigt <Hole.de...@gmx.de> wrote:
> I have not set any specific font in dillorc, so the default setting is
> used. However, when I change the monospace font to
>
> font_monospace="Monospace"
>
> then the rendering problem disappears and the underscores are
> correctly displayed. When I change to
>
> font_monospace="DejaVu Sans Mono"
>
> the rendering problem is present, i.e. the underscores are not
> displayed.
>
> Best regards,
> Alex
>
Confirmed. I am using "Liberation Mono", but with "DejaVu Sans Mono" have the same problem.
It is probably because of the characters height - the next row of text overwrites the previous. The question is whether this is because of Dillo or because of FLTK.
The same font, used in Firefox renders correctly.
_______________________________________________
Nick Warne
John Found <john...@asm32.info> wrote:
>
> Confirmed. I am using "Liberation Mono", but with "DejaVu Sans Mono"
> have the same problem. It is probably because of the characters
> height - the next row of text overwrites the previous. The question
> is whether this is because of Dillo or because of FLTK.
>
> The same font, used in Firefox renders correctly.
This looks like a bug in the font:
http://dejavu-fonts.org/wiki/Bugs/Archived
(you need to scroll down a bit).
I have version 2.34 installed - will see if I can reproduce it later.
Nick
--
Gosh that takes me back... or is it forward? That's the trouble with
time travel, you never can tell."
-- Doctor Who "Androids of Tara"
Nick Warne
Nick Warne <ni...@linicks.net> wrote:
> On Fri, 22 Jul 2016 20:12:59 +0300
> John Found <john...@asm32.info> wrote:
>
>
> >
> > Confirmed. I am using "Liberation Mono", but with "DejaVu Sans Mono"
> > have the same problem. It is probably because of the characters
> > height - the next row of text overwrites the previous. The question
> > is whether this is because of Dillo or because of FLTK.
> >
> > The same font, used in Firefox renders correctly.
>
> This looks like a bug in the font:
>
> http://dejavu-fonts.org/wiki/Bugs/Archived
>
> (you need to scroll down a bit).
>
> I have version 2.34 installed - will see if I can reproduce it later.
OK, I get the same issue. But if you change the font size, thus:
<pre style="background-color: white;
font-size:105%;">softpoint_with_block() {
the underscores are visible.
Nick Warne
Nick Warne <ni...@linicks.net> wrote:
> On Sat, 23 Jul 2016 10:01:59 +0100
> Nick Warne <ni...@linicks.net> wrote:
>
> > On Fri, 22 Jul 2016 20:12:59 +0300
> > John Found <john...@asm32.info> wrote:
> >
> >
> > >
> > > Confirmed. I am using "Liberation Mono", but with "DejaVu Sans
> > > Mono" have the same problem. It is probably because of the
> > > characters height - the next row of text overwrites the previous.
> > > The question is whether this is because of Dillo or because of
> > > FLTK.
> > >
> > > The same font, used in Firefox renders correctly.
> >
> > This looks like a bug in the font:
> >
> > http://dejavu-fonts.org/wiki/Bugs/Archived
> >
> > (you need to scroll down a bit).
> >
> > I have version 2.34 installed - will see if I can reproduce it
> > later.
>
> OK, I get the same issue. But if you change the font size, thus:
>
> <pre style="background-color: white;
> font-size:105%;">softpoint_with_block() {
>
> the underscores are visible.
Huh! Strangely the underscores become visible with font size set to
95% too! Only 100% renders them invisible?
Nick Warne
Nick Warne <ni...@linicks.net> wrote:
> On Sat, 23 Jul 2016 11:13:19 +0100
> Nick Warne <ni...@linicks.net> wrote:
>
> > On Sat, 23 Jul 2016 10:01:59 +0100
> > Nick Warne <ni...@linicks.net> wrote:
> >
> > > On Fri, 22 Jul 2016 20:12:59 +0300
> > > John Found <john...@asm32.info> wrote:
> > >
> > >
> > > >
> > > > Confirmed. I am using "Liberation Mono", but with "DejaVu Sans
> > > > Mono" have the same problem. It is probably because of the
> > > > characters height - the next row of text overwrites the
> > > > previous. The question is whether this is because of Dillo or
> > > > because of FLTK.
> > > >
> > > > The same font, used in Firefox renders correctly.
> > >
> > > This looks like a bug in the font:
> > >
> > > http://dejavu-fonts.org/wiki/Bugs/Archived
> > >
> > > (you need to scroll down a bit).
> > >
> > > I have version 2.34 installed - will see if I can reproduce it
> > > later.
> >
> > OK, I get the same issue. But if you change the font size, thus:
> >
> > <pre style="background-color: white;
> > font-size:105%;">softpoint_with_block() {
> >
> > the underscores are visible.
>
> Huh! Strangely the underscores become visible with font size set to
> 95% too! Only 100% renders them invisible?
OK, turning off 'use embedded CSS' makes them visible too.
CSS parsing error?
Jorge Arellano Cid
> > > IMHO, this is somehow related to the default fonts set in dillorc or
> > > the global set system fonts.
> >
> > +1
> >
> > A wild shot, but a cheap one, so I'd also try that first. Change your
> > default font to something else and see what happens.
> >
> > Also check FLTK's test programs (IIRC there's a symbols one, and another
> > that's useful to try fonts).
> >
> > If FLTK also has problems check the video driver (older kernel,
> > older/different video driver, GRUB CLI parameter).
>
> I have not set any specific font in dillorc, so the default setting is
> used. However, when I change the monospace font to
>
> font_monospace="Monospace"
>
> then the rendering problem disappears and the underscores are
> correctly displayed. When I change to
>
> font_monospace="DejaVu Sans Mono"
>
> the rendering problem is present, i.e. the underscores are not
> displayed.
I've tried all of them here and they work.
Devuan Jessie, amd64, Linux 4.5.0-2-amd64 (fltk-1.3.1).
------
Is that the only symbol that disappears?
Try a line like: !"#$%&/()=?¡-_{}^[]~.,;:|°
and check whether those are displayed.
--
Cheers
Jorge.-
Alexander Voigt
> Is that the only symbol that disappears?
> Try a line like: !"#$%&/()=?¡-_{}^[]~.,;:|°
> and check whether those are displayed.
disappears. All other characters are visible.
Best regards,
Alex
Jorge Arellano Cid
> Hi Jorge,
>
> > Is that the only symbol that disappears?
> > Try a line like: !"#$%&/()=?¡-_{}^[]~.,;:|°
> > and check whether those are displayed.
>
> When I open the attached page with dillo, only the underscore
> disappears. All other characters are visible.
Maybe, https://bbs.archlinux.org/viewtopic.php?id=125749
Nick Warne
Jorge Arellano Cid <jc...@dillo.org> wrote:
> > > Is that the only symbol that disappears?
> > > Try a line like: !"#$%&/()=?¡-_{}^[]~.,;:|°
> > > and check whether those are displayed.
> >
> > When I open the attached page with dillo, only the underscore
> > disappears. All other characters are visible.
>
> Maybe, https://bbs.archlinux.org/viewtopic.php?id=125749
I have attached a slightly different version of the test case, with a
few lower case g's stuck in there.
The tails of the g's show fine in Dillo, but if you then view the
source, the underscore appears maybe 1 or 2 pixels lower than the
bottom of the tails - looks like it goes outside the character bounding
box when rendered in HTML?