"Full Block" character in example block not visible in Beamer PDF

"Full Block" character in example block not visible in Beamer PDF

[Loris Bennett]

Hi,

I have a command line tool which generates an ASCII histogram.  I would
like to include the output in a PDF Beamer presentation.

Currently I am using an 'example' block, thus:

  #+begin_example
  ...

  ---------------------
  CPU Efficiency (%)
  ---------------------
    0.00 -  10.00  [ 0]
   10.00 -  20.00  [ 0]
   20.00 -  30.00  [ 0]
   30.00 -  40.00  [ 0]
   40.00 -  50.00  [ 0]
   50.00 -  60.00  [ 0]
   60.00 -  70.00  [ 0]
   70.00 -  80.00  [ 1]  ▉                 
   80.00 -  90.00  [24]  ████████████████████                                                                            
   90.00 - 100.00  [48]  ████████████████████████████████████████                                                        

  ...
  #+end_example

The blocks of the histogram are present in the PDF, but are white, like
the background of the slides.  I can see this by marking them with the
mouse.

Does anyone know what I need to do to make the full block character
visible in this situation?

Cheers,

Loris


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Re: "Full Block" character in example block not visible in Beamer PDF

[Juan Manuel Macías]

Loris Bennett writes:

> The blocks of the histogram are present in the PDF, but are white, like
> the background of the slides.  I can see this by marking them with the
> mouse.
>
> Does anyone know what I need to do to make the full block character
> visible in this situation?

Do you compile your document with pdfLaTeX?

It looks like you're using a Unicode character (FULL BLOCK / #2588 /
descomp: █ #2588) that pdfLaTeX doesn't recognize. You would have to use
LuaTeX or XeTeX as a TeX engine. And load the fontspec package to manage
the ttf or otf fonts. Additionally, you must define a mono font that
contains that character, for example Ubuntu Mono. An example:

#+TITLE: Some title
#+AUTHOR: author
#+Beamer_Header:\usepackage{fontspec}
#+Beamer_Header:\setsansfont{Linux Biolinum O}
#+Beamer_Header:\setmonofont{Ubuntu Mono}
#+LATEX_CLASS: beamer
#+LATEX_CLASS_OPTIONS: [presentation]
#+BEAMER_THEME: Boadilla
#+COLUMNS: %45ITEM %10BEAMER_ENV(Env) %10BEAMER_ACT(Act) %4BEAMER_COL(Col)

Screenshot:

https://i.imgur.com/ulYxJgr.png

Bonus: To check which fonts on your system contain a certain character,
you can use the TeX live tool Albatross. E.g.:

albatross █ --border-style 0 --detailed --show-styles --include-tex-fonts

Best regards,

Juan Manuel

--
Juan Manuel Macías -- Composición tipográfica, tratamiento de datos, diseño editorial y ortotipografía

Re: "Full Block" character in example block not visible in Beamer PDF

[Loris Bennett]

Juan Manuel Macías <maciaschain@posteo.net> writes:

> Loris Bennett writes:
>
>> The blocks of the histogram are present in the PDF, but are white, like
>> the background of the slides.  I can see this by marking them with the
>> mouse.
>>
>> Does anyone know what I need to do to make the full block character
>> visible in this situation?
>
> Do you compile your document with pdfLaTeX?

Yes.

> It looks like you're using a Unicode character (FULL BLOCK / #2588 /
> descomp: █ #2588) that pdfLaTeX doesn't recognize. You would have to use
> LuaTeX or XeTeX as a TeX engine. And load the fontspec package to manage
> the ttf or otf fonts. Additionally, you must define a mono font that
> contains that character, for example Ubuntu Mono. An example:
>
> #+TITLE: Some title
> #+AUTHOR: author
>
> #+Beamer_Header:\usepackage{fontspec}
> #+Beamer_Header:\setsansfont{Linux Biolinum O}
> #+Beamer_Header:\setmonofont{Ubuntu Mono}
> #+LATEX_CLASS: beamer
> #+LATEX_CLASS_OPTIONS: [presentation]
> #+BEAMER_THEME: Boadilla
>
> #+COLUMNS: %45ITEM %10BEAMER_ENV(Env) %10BEAMER_ACT(Act) %4BEAMER_COL(Col)
>
> Screenshot:
>
> https://i.imgur.com/ulYxJgr.png

The following seems to be sufficient for me 

  #+LATEX_COMPILER: xelatex
  #+BEAMER_HEADER: \setmonofont{Fira Code}

Fira Code being the font for the terminal in which the histograms are
generated.

> Bonus: To check which fonts on your system contain a certain character,
> you can use the TeX live tool Albatross. E.g.:
>
> albatross █ --border-style 0 --detailed --show-styles --include-tex-fonts

Good to know.

Thanks!

Loris

> Best regards,
>
> Juan Manuel
>
> --
> Juan Manuel Macías -- Composición tipográfica, tratamiento de datos, diseño editorial y ortotipografía
>
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