HiDPIUtils.scale can return a rectangle with zero dimensions

There’s a bit of a setup to this, more specifically, to have a certain combination of rotation and translation (maybe just rotation) installed on the graphics context. I use that in Radiance to rotate the visuals of tabs in LEFT and RIGHT placement.

If you have these inputs to the scale method:

transform = AffineTransform[[-0.0, 2.5, 820.0], [-2.5, 0.0, 557.5]]
x = 0
y = 0
width = 54
height = 19

The rectangle returned is java.awt.geom.Rectangle2D$Double[x=820.25,y=557.25,w=0.0,h=0.0]

Notice it has zero width and height

[DevCharly]

This is now fixed in main branch. Rotation is now handled correctly.

There is also a small app that I used to test whether g.fillRect(...) and HiDPIUtils.paintAtScale1x( (...) -> g.fillRect(...) ) produce the same result.

Red rectangle is filled without HiDPIUtils and green rectangle is filled using HiDPIUtils.

[eirikbakke]

@DevCharly Yes! Fair enough for the non-90-degree scalings.