Size of pencil tool - 1px?

[Paul Wellner Bou]

Hi Newsgroup,

I am searching for a way to set the size of the
pencil tool. I am working on some icons for a website
with a size of 3x3 pixels (or similar sizes) and the
only way i found to change the color of only one pixel
is to select this pixel and use then the pencil on
this selection.

Is there a way to use the pencil tool and set it's
size to 1x1 pixel?

Thx very much.
Paul.

[Dave Neary]

Hi Paul,

On Thu, 02 Oct 2003 13:04:40 +0200, Paul Wellner Bou said:
> Is there a way to use the pencil tool and set it's
> size to 1x1 pixel?

Selecting a 1x1 brush should do that. The pencil turns off antialiasing,
more or less, so that should only colour whole pixels.

Cheers,
Dave.

--
David Neary,
E-Mail: bolsh at gimp dot org
Work e-mail: d dot neary at phenix dot fr
CV: http://www.redbrick.dcu.ie/~bolsh/CV/CV.html

[Paul Wellner Bou]

Hi Dave,

> Selecting a 1x1 brush should do that. The pencil turns off antialiasing,
> more or less, so that should only colour whole pixels.

Oh god... yes, thats it. :-) And i searched in the pencil tool options
dialog...
Thx very much.

Yes, antialiasing working pixel by pixel doesn't make
sense ;-). No problem, it workes fine.

Regards
Paul.

[Dave Neary]

Actually, what I meant by that is clear if you use the 1x1 brush with
the paintbrush. The GIMP has sub-pixel clicking. If you zoom in to 16:1
and click in a pixel's top-right corner, 4 pixels will be made grey. The
1 pixel brush draws its pixel over the 4, and it is then scaled down
proportional to the portion of the pixel covered... This might explain
it better...

+ + +

+-------------+
| |
| |
| X |
| |
+ | + | +
+-------------+

+ + +

I click on the X while zoomed in. Most of the 1px brush is in the pixel
on which I clicked (let's say 55%), but there's a portion in the top
right (20%) and bottom left (20%) and a little in the bottom right (5%).
This click would draw the top right pixel at 255*.55 = 140, the top
right and bottom left at 255*.2 = 51, and the bottom right at 255*.05 =
10.

Which is kind of like antialiasing, but is actually just sub-pixel
rendering.