Adjusting a curve strength
What I'd like to do is to add a way to give more strength to a curve. For example, you tune a color zone curve to give a special effect. Then you want to give a bit more strength to the effect, for this you have to move the 8 control points. Likewise for the equalizer or tone curve. I think it would be nice to have a way to strengthen or lessen or lessen an effect. Maybe by adding a slider? In fact it is possible to lessen an effect by adding a normal blend and use the opacity with a value below 100%, but it is not possible to add more strength.
Would it works to just let the blend mode opacity to go above 100%?
If not, should we add another slider into the GUI?
Any other proposal?
Of course I volunteer to work on this.
#3 Updated by Pascal Obry over 4 years ago
Won't work I think. We do not want to change directly the control point. If all of them are reaching zero you have lost all information. I think it is best to have a way to apply a multiplier to all values. I have this working on my side, need some more testing and I'll propose for review.
Maybe it would have been possible to do that in the blend support... But here we can lesser an effect but not make it stronger, so not sure it is the place to support this.
#5 Updated by Pascal Obry over 4 years ago
This can be review here: https://github.com/darktable-org/darktable/pull/216