Add BlurredRoundedRectangle

peniko/src/blurred_rounded_rect.rs

@@ -0,0 +1,20 @@
+// Copyright 2026 the Peniko Authors
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+use crate::color::{AlphaColor, Srgb};
+use crate::kurbo::Rect;
+
+/// A blurred, rounded rectangle.
+///
+/// May be used in renderer APIs, as a fast path to render shadows for rounded rectangles.
+#[derive(Debug)]
+pub struct BlurredRoundedRect {
+    /// The base rectangle to use for the blur effect.
+    pub rect: Rect,
+    /// The color of the blurred rectangle.
+    pub color: AlphaColor<Srgb>,
+    /// The radius of the rounded rectangle's corners.
+    pub radius: f32,
+    /// The standard deviation of the blur effect.
+    pub std_dev: f32,
+}

peniko/src/lib.rs

@@ -25,6 +25,7 @@
 #![no_std]
 
 mod blend;
+mod blurred_rounded_rect;
 mod brush;
 mod gradient;
 mod image;
@@ -43,6 +44,7 @@ pub use kurbo;
 pub use linebender_resource_handle::{self, Blob, FontData, WeakBlob};
 
 pub use blend::{BlendMode, Compose, Mix};
+pub use blurred_rounded_rect::BlurredRoundedRect;
 pub use brush::{Brush, BrushRef, Extend};
 pub use gradient::{
     ColorStop, ColorStops, ColorStopsSource, Gradient, GradientKind, InterpolationAlphaSpace,