• adds missing gpl preambles to new files

I have fixed the issues with color selection.

• ArtColorSel: user-defined gamma correction for HSY model

• ArtColorSel: fixes regressions in color selection

In D14249#297455, @rempt wrote:

This is looking good! I feel it's getting close to be ready to merge to master.

• ArtColorSel: flips the wheel to match advanced color selector, drops alignment change for swatches
• code cleanup

In D14249#295321, @rempt wrote:

Does this need to be applied on top of the other patch, or can it be applied directly?

In D13525#285130, @rempt wrote:

Hm, that is strange -- how do you create the patch? Do you make a commit with git that you export with git format-patch?

Good evening, @dkazakov,

thank you for testing my diff.

I have fixed several crashes and further improved the mask resource type for sharing among multiple selectors. I have also changed the UI to be more straightforward to use and more user-friendly. Gamut masks can be now previewed in the color selector while being edited (though not live, only when the preview button is clicked).

Thanks for the report, the bug was indeed there (due to use of an uninitialized pointer), I have fixed it. I am working on fixing other crashes, I will update the diff after that.

In cooperation with Ahmed Hussein, I started preparing the code to be reused by other color selectors (bug 373922).

The original diff did not compile, due to my morning sloppiness, sorry for that.