Please review my patch

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My last comment in https://gitlab.gnome.org/GNOME/gimp/-/issues/2933 is:
"Could someone please review this patch? It works. . . . This is a year old bug that could be fixed if someone would just commit the code. The corresponding bug in GEGL hue-chroma has been fixed - maybe we could get this fixed also in GIMP? Maybe even in GIMP-2.10?"
#endquote

Seven months later still nobody has reviewed the patch.

A similar bug report, almost certainly the exact same bug - can't see how it could be anything else - was filed recently:
https://gitlab.gnome.org/GNOME/gimp/-/issues/6308

to which bug report a request for "Additional Diagnostics" was attached.

The requested "Diagnostics" were available 8 months ago in bug #2933. It's a matter of precision. The "EPSILON" value used in the layer blend code is too small to eliminate unavoidable rounding errors in the LCh Chroma code.

I attached an updated patch to the new bug report. The update doesn't change the actual code that fixes the problem - it just allows the patch to be applied to the affected layer blend file given other recent changes to the file.

I can guess the response from other devs as to why nobody has taken the time to review my patch: Other priorities, too few developers, too much to do, nobody else has color management or color science as a top priority.

I do understand the problem of too few devs, but if one of the GIMP devs could take it upon themselves to finally get around to checking my patch, then three bug reports could be closed: the two mentioned above and also https://gitlab.gnome.org/GNOME/gimp/-/issues/2934 - leastways I'm pretty sure the latter bug is also fixed - none of these three bugs affect the already-patched version of GIMP that I use for editing.

I had totally forgotten about bugs #2933 and #2934 (which I filed a year ago) until bug #6308 was filed. There's nothing else I can do about these bugs. I don't have - and don't want - commit rights to GIMP code. Some other GIMP dev needs to actually check the patch and decide it works and then apply it.

Regards,
Elle
--
https://ninedegreesbelow.com
Color management and free/libre photography
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