From: "Luis Felipe López Acevedo" <felipe.lopez@openmailbox.org>
To: Mark H Weaver <mhw@netris.org>
Cc: guix-devel@gnu.org
Subject: Re: [PATCH] system: grub: Convert grub background using rsvg-convert
Date: Fri, 28 Aug 2015 17:38:41 -0500 [thread overview]
Message-ID: <0ad7d8f09c5f6df2a8e8a58c773d5c68@openmailbox.org> (raw)
In-Reply-To: <87wpwfi851.fsf@netris.org>
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On 2015-08-28 13:24, Mark H Weaver wrote:
> Hi Luis, thanks for the quick response.
>
> Luis Felipe López Acevedo <felipe.lopez@openmailbox.org> writes:
>
>> On 2015-08-27 16:19, ludo@gnu.org wrote:
>>> Mark H Weaver <mhw@netris.org> skribis:
>>>
>>>> The main difficulty here was that our SVG artwork is partially
>>>> transparent, and includes a "Background" layer with a checker-board
>>>> pattern. I guess this layer is for convenience when editing in
>>>> Inkscape, and apparently Inkscape excludes the "Background" layer
>>>> when
>>>> exporting to png. Other tools render all layers. Therefore,
>>>> avoiding
>>>> Inkscape required code to remove that layer before conversion to
>>>> png.
>>>
>>> Fun. :-)
>>>
>>> If possible, I would rather remove said layer directly in the
>>> guix-artwork repo, or somehow make that layer invisible to
>>> rsvg-convert. Luis Felipe: What’s your take on this?
>>
>> If I understand correctly, the problem is transparency, right? I don't
>> understand why transparency would be an issue when exporting PNG
>> images, but I don't know how rsvg works.
>>
>> In any case, the SVG has transparency in several parts:
>>
>> - The logo.
>> - The checkerboard pattern (which is part of the design as in the slim
>> login screen).
>
> Ah, okay, so my guesses were incorrect. I guess the problem is
> actually
> that rsvg-convert (from librsvg) fails to render these SVG files
> correctly. Here's how it renders grub/GuixSD-fully-black-4-3.svg on a
> black background:
>
> rsvg-convert --width 640 --height 480 --background-color black \
> --format png --output ~/grub-background.png \
> grub/GuixSD-fully-black-4-3.svg
>
>
>
>> Modifying the first to be fully opaque is time consuming, but can be
>> done.
>
> No need, we should keep the source file in the preferred form for
> editing. I'll see if I can figure out what librsvg is doing wrong,
> and in the meantime we can keep using inkscape to do the conversion.
>
> Thanks again,
>
> Mark
OK, so the culprit is the checkerboard pattern. I generated it with
Inkscape, and it seems that it uses raster images instead of SVG. I
tried doing one by hand and it works alright with rsvg-convert (see
attached SVG).
I would commit changes directly to the repo, but I don't have a computer
right now where I can install my tools. If you want, I can modify the
files that use the checkerboard pattern this Saturday or Sunday and send
them to you to put them in the repo.
Is that OK?
--
Luis Felipe López Acevedo
http://sirgazil.bitbucket.org/
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next prev parent reply other threads:[~2015-08-28 22:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-23 18:23 [PATCH] system: grub: Convert grub background using rsvg-convert Mark H Weaver
2015-08-27 21:19 ` Ludovic Courtès
2015-08-28 17:15 ` Luis Felipe López Acevedo
2015-08-28 18:24 ` Mark H Weaver
2015-08-28 22:38 ` Luis Felipe López Acevedo [this message]
2015-08-29 13:55 ` Luis Felipe López Acevedo
2015-08-31 8:57 ` Andy Wingo
2015-08-31 21:05 ` Ludovic Courtès
2015-10-17 13:17 ` Ludovic Courtès
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