[NTG-context] Can LMTX help me with this PDF manipulation?

[NTG-context] Can LMTX help me with this PDF manipulation?

[Gerben Wierda]

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I have a large PDF with mostly vector and a bit of pixel graphics. It is in two colours only (the pixels are either one colour or the other, no dithering). I want to create a new PDF of a segment of the larger PDF (bottom left corner), where vector is maximally preserved, and where one colour is replaced by 100% transparency.

I was wondering if that is doable by using LMTX instead of trying to do this with some GUI app.

Thanks,

Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>, Mastodon <https://newsie.social/@gctwnl>)
R&A IT Strategy <https://ea.rna.nl/> (main site)
Book: Chess and the Art of Enterprise Architecture <https://ea.rna.nl/the-book/>
Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/>
YouTube Channel <http://www.youtube.com/@GerbenWierda>

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[NTG-context] Re: Can LMTX help me with this PDF manipulation?

[Bruce Horrocks]

> On 29 Jul 2024, at 21:59, Gerben Wierda <gerben.wierda@rna.nl> wrote:
> 
> I have a large PDF with mostly vector and a bit of pixel graphics. It is in two colours only (the pixels are either one colour or the other, no dithering). I want to create a new PDF of a segment of the larger PDF (bottom left corner), where vector is maximally preserved, and where one colour is replaced by 100% transparency.
> 
> I was wondering if that is doable by using LMTX instead of trying to do this with some GUI app.

I would start with \clip & \setupclipping to obtain the segment, and \definetransparency to set one of the colours to be transparent.
<https://wiki.contextgarden.net/Transparency>

—
Bruce Horrocks
Hampshire, UK

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[NTG-context] Re: Can LMTX help me with this PDF manipulation?

[Gerben Wierda]

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Thank you.

Regarding transparency (clipping I fully am convinced that is doable, just wondering how), I looked at that but

    {\starttransparent[tnormal]\externalfigure[cow.pdf][width=9cm]\stoptransparent}

makes the entire PDF transparent, not just one colour inside that PDF.

Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>, Mastodon <https://newsie.social/@gctwnl>)
R&A IT Strategy <https://ea.rna.nl/> (main site)
Book: Chess and the Art of Enterprise Architecture <https://ea.rna.nl/the-book/>
Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/>
YouTube Channel <http://www.youtube.com/@GerbenWierda>

> On 30 Jul 2024, at 01:03, Bruce Horrocks <ntg@scorecrow.com> wrote:
> 
> 
> 
>> On 29 Jul 2024, at 21:59, Gerben Wierda <gerben.wierda@rna.nl> wrote:
>> 
>> I have a large PDF with mostly vector and a bit of pixel graphics. It is in two colours only (the pixels are either one colour or the other, no dithering). I want to create a new PDF of a segment of the larger PDF (bottom left corner), where vector is maximally preserved, and where one colour is replaced by 100% transparency.
>> 
>> I was wondering if that is doable by using LMTX instead of trying to do this with some GUI app.
> 
> I would start with \clip & \setupclipping to obtain the segment, and \definetransparency to set one of the colours to be transparent.
> <https://wiki.contextgarden.net/Transparency>
> 
> —
> Bruce Horrocks
> Hampshire, UK
> 
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive  : https://github.com/contextgarden/context
> wiki     : https://wiki.contextgarden.net
> ___________________________________________________________________________________


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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
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