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Re: [PATCH] color-hsv-to-rgb

From: Jim Porter
Subject: Re: [PATCH] color-hsv-to-rgb
Date: Thu, 19 Oct 2023 12:58:36 -0700

On 10/16/2023 12:59 AM, Stefan Kangas wrote:
Dov Grobgeld <dov.grobgeld@gmail.com> writes:

I would like to do my first(!) contribution to emacs with the attached
patch. Is there interest, or is it too trivial? Do I need to do a copyright
assignment? Is there a guide for dummies on how to do that?

Welcome to Emacs!

I don't see why we couldn't take a patch implementing the inverse of
`color-rgb-to-hsv', so I think there's interest.  It would be
interesting to know what you need it for, though.

For what it's worth, I thought about adding this function too. I would use it for a custom theme to choose colors for 'vc-annotate'. My hypothetical code would take a starting color (in RGB), convert to HSV, and then increment the value component to produce gradually lighter colors. After that, I'd need a way to convert back to RGB to make the hex string for the face attribute, hence this new function.

(Even better would be conversions between RGB and LCh, but that's a bigger project.)

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