egui_demo_app color test lines

[Letronix624]

The color test in the egui_demo_app crate got weird lines between the gradients since version 0.23.

Here in this screenshot you can see them clearly.

they are also seen in the official demo app color test web page when you start scrolling.
I don't think that started happening intentionally.

[alufers]

Is maybe your browser zoomed in? I observed similar behavior when being 125% zoomed in. For me it happens for every non-integer zoom amount (e. g. not 100%, 200% etc.).

[Letronix624]

This screenshot is not from the browser version. The browser version also contains those lines and it is not zoomed in.

[emilk]

I wonder if this can be solved by:

• Align shapes to physical pixel grid #5164