255*3 being replaced by 254*3

[Start]

I draw a line with total white (255*3 / antialiasing on), then try to recolor it, when I use tolerance 0, some edge pixels color don't change, cos they are 254*3 with transparency

or, I draw a line with white (255*3 with trans-alpha 100), it end up as 254*3 with trans-alpha 100

hope you can understand my english.

this probably is not a big deal to you, but I find it might have something to do with this (posts from me&Max Power), I know this is not the place to report plug-ins' bug, but it happens to a lot things, like the outline plug-in (built-in version), so maybe it's not them.

[david.atwell]

It's not a bug. The slightly transparent pixels are the anti-aliasing at work. Turn that off, and you should be good. :-)

Moved to GD&Q

[Start]

but shouldn't those transparent pixels be 255*3 ? I do want a WHITE line. this is okay, I can just use brightness or up the tolerance a little.

I draw a line with white (255*3 with trans-alpha 100), it end up as 254*3 with trans-alpha 100

this happens even with anti-aliasing off, I'm not talking about those edge pixels, it's the main part.

and I just tried this

open paint.net--add a new layer

1. if I fill it with 255*3 trans-alpha from 1-48, then use color picker to check, it is exactly the color I use

2. if I fill it with 255*3 trans-alpha from 49-254, then use color picker to check, it is 254*3 trans-alpha the same

(overwrite, not normal blending)

(ok, I just did again with 128*3, even weirder, 128*3 trans-alpha 5 turns into 153*3 trans-alpha 5)

and can someone tell me the right way to say a color with transperancy, please? :oops:

[Blooper]

I guess you could say RGB: 255 and Alpha: 255 for opaque white. There's no proper way really.