Bug: Can't set background color of latex fragment

Bug: Can't set background color of latex fragment

[Sébastien Miquel]

To reproduce with `emacs -Q` :
  - Open an org buffer
  - Call ~(setq org-format-latex-options '(:foreground default
    :background "Black" :matchers ("$")))~
  - Call =C-c C-x C-l= (org-latex-preview) on a latex fragment such as
    $abc$

This bug was introduced by the commit 2f9e1569f which adds the option
`-bg Transparent` to the arguments of `dvipng`. According to its
manual, this option should be ignored if a background is already set,
but it doesn't seem to be. Perhaps org should set it differently.

--
Sébastien Miquel

Re: Bug: Can't set background color of latex fragment

[Roshan Shariff]

I can confirm this bug with dvipng --- with the "-bg Transparent"
option, dvipng ignores the background color from the input tex file,
whereas without that option it always produces an opaque background.
There's currently no way to dynamically change command line
parameters, so I'm not sure how to solve this problem while supporting
both use cases.

On Wed, Apr 7, 2021 at 1:38 PM Sébastien Miquel
<sebastien.miquel@posteo.eu> wrote:
>
>
> To reproduce with `emacs -Q` :
>   - Open an org buffer
>   - Call ~(setq org-format-latex-options '(:foreground default
>     :background "Black" :matchers ("$")))~
>   - Call =C-c C-x C-l= (org-latex-preview) on a latex fragment such as
>     $abc$
>
> This bug was introduced by the commit 2f9e1569f which adds the option
> `-bg Transparent` to the arguments of `dvipng`. According to its
> manual, this option should be ignored if a background is already set,
> but it doesn't seem to be. Perhaps org should set it differently.
>
> --
> Sébastien Miquel