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## Defining what `Rounding` is This PR defines what `Rounding` means: it is the corner radius of underlying `RectShape` rectangle. If you use `StrokeKind::Inside`, this means the rounding is of the outer part of the stroke. Conversely, if you use `StrokeKind::Outside`, the stroke is outside the rounded rectangle, so the stroke has an inner radius or `rounding`, and an outer radius that is larger by `stroke.width`. This definitions is the same as Figma uses. ## Improving general shape rendering The rendering of filled shapes (rectangles, circles, paths, bezier) has been rewritten. Instead of first painting the fill with the stroke on top, we now paint them as one single mesh with shared vertices at the border. This has several benefits: * Less work (faster and with fewer vertices produced) * No overdraw (nicer rendering of translucent shapes) * Correct blending of stroke and fill The logic for rendering thin strokes has also been improved, so that the width of a stroke of `StrokeKind::Outside` never affects the filled area (this used to be wrong for thin strokes). ## Improving of rectangle rendering Rectangles also has specific improvements in how thin rectangles are painted. The handling of "Blur width" is also a lot better, and now works for rectangles with strokes. There also used to be bugs with specific combinations of corner radius and stroke width, that are now fixed. ## But why? With the new `egui::Scene` we end up with a lot of zoomed out shapes, with sub-pixel strokes. These need to look good! One thing led to another, and then I became obsessive 😅 ## Tessellation Test In order to investigate the rendering, I created a Tessellation Test in the `egui_demo_lib`. [Try it here](https://egui-pr-preview.github.io/pr/5669-emilkimprove-tessellator)   |
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README.md
egui demo app
This app demonstrates egui and eframe.
View the demo app online at https://egui.rs.
Run it locally with cargo run --release -p egui_demo_app.
egui_demo_app can be compiled to WASM and viewed in a browser locally with:
./scripts/start_server.sh &
./scripts/build_demo_web.sh --open
egui_demo_app uses egui_demo_lib.
Running with wgpu backend
(cd egui_demo_app && cargo r --features wgpu)