Re: Confirming no color gradients

[Henning Hraban Ramm]

> Am 23.04.2021 um 20:21 schrieb Jean Abou Samra <jean@abou-samra.fr>:
> 
> Le 22/04/2021 à 03:37, Michael Blankenship a écrit :
> 
>> I'm just hoping to confirm that Lilypond does not have any way to generate 
>> or apply continuous color gradients to grobs. It certainly doesn't seem like 
>> it, since a search for the term returns zero results, a first for me.
>> ​
>> So, no color gradients, right?​
> 
> There is this LSR snippet:
> 
> https://lsr.di.unimi.it/LSR/Item?id=1060
> 
> It works for \markup \path.
> 
> To apply a gradient to an arbitrary grob,
> you'd need Scheme code to generate the
> appropriate commands in PostScript.
> 
> After some hours trying to do that, I gave up
> due to poor understanding of PostScript.
> Sorry!

When I used to write PostScript code, I could only use PS level 2, and that 
doesn’t contain gradients – you can just simulate them with loops that draw 
stripes. But PS level 3 (published in 1997) has some support.

Maybe this helps: 
https://stackoverflow.com/questions/7500185/postscript-drawing-a-gradient

But getting into PS isn’t easier than getting into Scheme, and I guess you need 
to understand both.

Hraban