> Am 06.09.2021 um 04:13 schrieb Aditya Mahajan via ntg-context 
> <ntg-context@ntg.nl>:
> 
> On Sun, 5 Sep 2021, Henning Hraban Ramm via ntg-context wrote:
> 
>> 
>>> Am 05.09.2021 um 10:10 schrieb Hans Hagen <j.ha...@xs4all.nl>:
>>>> BTW, here’s my script:
>>>> Here are some results:
>>> 
>>> Did you try that with the filter module? It would make it more portable
>> 
>> I completely forgot I could do that (and I even know how).
> 
> See attached. Basically, you can just copy-paste your script as the value of 
> the filtercommand, and that's it. 

Thank you! I could have done it myself...

But Hans was in a generous and experimenting mood and wrote 
- Lua code interfacing GraphicsMagick to manipulate bitmap data
- a MP interface to ImageMagick

I just need to test them and will report.


> PS: I realized that there is a regression, and \externalfilterbasefile does 
> not remove the file extension. So, the output is named mill.png-taped.png 
> rather than mill-taped.png. I'll look into it later

Oh, thank you. I need to check in my LilyPond setup.


Hraban
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