Re: [Tuxpaint-devel] Xor of stamps too fine in high resolution screens

[Bill K. <nb...@so...>]

On Fri, Mar 17, 2023 at 07:30:46AM -0400, Albert Cahalan wrote:
> On 3/17/23, Bill Kendrick <nb...@so...> wrote:
> > On Fri, Mar 17, 2023 at 12:41:19AM +0100, Pere Pujal i Carabantes wrote:
> 
> >> Pixels are too tiny that make hard to see the Xor,
> >> of course it is there and with a little of attention
> >> one sees it but it is hard to see.
> >>
> >> I wonder if we could make the Xor thicker so it is
> >> easy to see.
> 
> Thicker in which way? The dots could be thicker,
> or the outline could be thicker, or both.
<snip>

Thanks for the description of how it works.  (Funny to learn
only that "8" was ever used... room for some simplification?)

I went with simply making the outline thicker, and I totally
cheated, but I think it looks fine and will hopefully be
helpful on devices with high dot pitch (like my phone).

When it decides it's worth XOR'ing a pixel, it now also does
this:

 * If it's _NOT_ already going to XOR the adjacent pixel to the right, XOR it too
 * Ditto for the adjacent pixel below
 * Ditto for the adjacent pixel below & to the right

So basically -- ASCII art coming -- if before we were doing this:

  #-#-#-
  -....#
  #....-
  -....#
  #-#-#-

(where "#" is an XOR'd pixel, and "-" would be a XOR'd pixel,
except for the stiple pattern telling us to skip it)

We will now do this:

 #-#-#-#
 -#-#-#-
 #-...-#
 -#...#-
 #-#-#-#
 -#-#-#-

It tries to turn what was a point before into a square
(but still stipled).


It looks fine to me on my laptop and my external monitors.
Both are 1920x1080.  The external is a 23", so about 96ppi.
The laptop is 14", so almost 160ppi.

Wikipedia tells me my phone (a plain (non pro) Pixel 7)
has a PPI of 416.  Wow, no wonder I can't see anything on it!

Pere & others, how does it look to you with this change?

-bill!