Bold buttons in v7

[Venom668]

v6: v7:

Settings:

With medium button size it looks okay, identical to v6, not bold. Is large supposed to look like this from now on?

[Zren]

The line thickness scaling has been broken for a while. I had a qRound() on the line thickness which made it an integer, which made those sharp lines. Using an int royally screwed up the icon scaling in Small and Tiny button size.

• https://github.com/Zren/material-decoration/blame/master/src/Button.cc#L303
• Broken: https://github.com/Zren/material-decoration/commit/3db3b364f30012c7eea7f21d0b1d2b84901ad9b9
• Fixed: https://github.com/Zren/material-decoration/commit/f203f6ead628af82da9db13eea22093522bbb851
• Close button now draws a smooth anti aliased line: https://github.com/Zren/material-decoration/blame/master/src/CloseButton.h#L46

I might try PenWidth::Symbol * qMax(1.0, qRound(gridUnit)); to see how it looks.

Very Large is 32px, or 1.5x scaling of a 24px tall titlebar. In theory that should be when it starts using 2px line thickness.

However since Minimize and Maximize are not anti-aliased, it's drawing them with thick solid lines. I take a stab at it later when I finish messing around with kwin_wayland.

[Venom668]

Using PenWidth::Symbol * qMax(1.0, qRound(gridUnit)); fixes the issue for me, thanks!