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2 commits

Author SHA1 Message Date
ickshonpe
aab36f3951
UI anti-aliasing fix (#16181)
# Objective

UI Anti-aliasing is incorrectly implemented. It always uses an edge
radius of 0.25 logical pixels, and ignores the physical resolution. For
low dpi screens 0.25 is is too low and on higher dpi screens the
physical edge radius is much too large, resulting in visual artifacts.

## Solution

Multiply the distance by the scale factor in the `antialias` function so
that the edge radius stays constant in physical pixels.

## Testing

To see the problem really clearly run the button example with `UiScale`
set really high. With `UiScale(25.)` on main if you examine the button's
border you can see a thick gradient fading away from the edges:

<img width="127" alt="edgg"
src="https://github.com/user-attachments/assets/7c852030-c0e8-4aef-8d3e-768cb2464cab">

With this PR the edges are sharp and smooth at all scale factors: 

<img width="127" alt="edge"
src="https://github.com/user-attachments/assets/b3231140-1bbc-4a4f-a1d3-dde21f287988">
2024-11-13 21:41:02 +00:00
ickshonpe
3d72f494a2
Layout rounding debug example (#16096)
# Objective

Simple example for debugging layout rounding errors.

<img width="1039" height="752" alt="layout_rounding_debug"
src="https://github.com/user-attachments/assets/12673000-e267-467e-b25b-3f8001c1347c">

Any white lines are gaps in the layout caused by coordinate rounding
errors.
2024-10-27 20:08:51 +00:00