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LibWeb: When growing or shrinking a border-radius, ignore it if it's 0

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This function is used to calculate a matching radius that goes inside or
outside of the border. For example, if the border-radius is 10px and we
are 5px further out, the radius needs to be 15px to look right.
However, if the radius is 0 it isn't rounded, and we want to keep the
same sharp corner no matter how far we go.

This makes our outline rendering better match Chrome and Firefox.
This commit is contained in:
Sam Atkins 2023-08-24 14:31:04 +01:00 • committed by Andreas Kling
parent d1aea87889
commit 29b2022303
1 changed files with 4 additions and 2 deletions
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6
Userland/Libraries/LibWeb/Painting/BorderPainting.h
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@ -33,8 +33,10 @@ struct BorderRadiusData {
inline void shrink(CSSPixels horizontal, CSSPixels vertical)
{
horizontal_radius = max(CSSPixels(0), horizontal_radius - horizontal);
vertical_radius = max(CSSPixels(0), vertical_radius - vertical);
if (horizontal_radius != 0)
horizontal_radius = max(CSSPixels(0), horizontal_radius - horizontal);
if (vertical_radius != 0)
vertical_radius = max(CSSPixels(0), vertical_radius - vertical);
}
};