GNOME Bugzilla – Bug 163602
Paint tools/Brush editor: create square brushes with an even number of pixels
Last modified: 2018-05-24 11:22:15 UTC
If I make a brush with a radius of 1 Gimp generates a 3x3 brush, but I would expect a 2x2 brush.
The brush editor is designed to create brushes centered on a pixel, which always yields an odd size. It is reasonable to want more flexibility, but the lack of it isn't a bug, it's just a design feature of the brush editor -- so I am going to reclassify this as an enhancement request.
If I make a brush with a radius of one and I'll get a brush with a diameter of three pixel there is something wrong. So I would call it a bug and not a design feature.
There is only one possible symmetrical 2x2 brush: XX XX The radius of this brush (computed from its area) is actually about 1.13 pixels. Also, with 2x2 brushes, there is no possibility of a continuous gradation -- the only possibility is to leap directly from 1x1 to 2x2. By using a 3x3 brush, it becomes possible to set it up as X X@X X and by adjusting the values of the 'X' pixels appropriately, it is possible to make the total brightness equal to that of a precise 1-pixel-radius circle, and to adjust the "radius" smoothly and continuously across the whole range. So it's a tradeoff. It spreads out a little further than you would like, but there are other advantages to compensate. If you really need a 2x2 brush, you should just create it as a 2x2 image and save it as a .gbr file -- then you will have it without having to play with the brush editor.
I think you are right for the round brushes, but Gimp has square brushes too. And with the background of the information, that a brush always is centered around a pixel I have now seen, that it is not possible to make a square with an even number of pixels. # (radius 0.1..0.6) ## ## (missing) ### ### ### (radius 0.7..1.6) #### #### #### #### (missing) ... P.S. I have a 2x2 gbr-brush but I try to replace all my gbr-brushes. (See bug #157506)
*** Bug 678256 has been marked as a duplicate of this bug. ***
*** Bug 778344 has been marked as a duplicate of this bug. ***
-- GitLab Migration Automatic Message -- This bug has been migrated to GNOME's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.gnome.org/GNOME/gimp/issues/117.