GNOME Bugzilla – Bug 791458
"Gradient Map" with on-canvas preview and gradient editing
Last modified: 2018-05-24 18:52:56 UTC
Currently "Gradient Map" directly applies the current gradient to the pixels. It would be nice to be able to get an intermediary dialog allowing to edit the gradient (similar to the current on-canvas GUI to edit the gradient in Blend tool) and see a gradient mapping preview on-canvas. I realized the problem when playing with the new file format HGT of elevation data (bug 771661). To map various elevations to colors, I had to edit the current gradient, then run "Gradient Map", then cancel, then tweak the gradient more, then run again, then cancel, and so on. An on-canvas preview and gradient editing would be a very worthwhile update to "Gradient Map".
I think that's a really great idea and a very useful feature.
Should Ell take 5 seconds to implement :)
For the time being there is also the gegl operation gegl:gradient-map accessible through Tools->GEGL operations... it somewhat works after adding a value_range (0, 1) here: https://git.gnome.org/browse/gegl/tree/operations/workshop/gradient-map.c#n27 and ticking the sRGB check
(In reply to Michael Natterer from comment #2) > Should Ell take 5 seconds to implement :) Ahahah. I was thinking the same thing. Though I have been pushing for feature freeze so unless he can make it happen in the next few days, I'd suggest we delay this for a 2.10.x, otherwise we will push again the release. (In reply to Massimo from comment #3) > For the time being there is also the gegl operation > gegl:gradient-map accessible through Tools->GEGL operations... I don't have this operation in my list on master. ;-(
I love the new gradient adjustments and was recently hoping for something like this on the gradient map. I hope this will be in 2.10. This would be great not just for heightmaps, but for lots of things.
Chances are low it makes it to 2.10 or it has to be done very very soon. We must really start to freeze the features if we don't want to delay the release forever. Note that even if it doesn't make it to 2.10, it may still be released in a 2.10.x since we decided to relax the "no-feature" rule on minor versions after 2.10 (it only depends on how much work a feature backport is since master will still always be priority).
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