non uniform border radius for quads

graphics/src/layer/quad.rs

@@ -17,7 +17,7 @@ pub struct Quad {
     pub border_color: [f32; 4],
 
     /// The border radius of the [`Quad`].
-    pub border_radius: f32,
+    pub border_radius: [f32; 4],
 
     /// The border width of the [`Quad`].
     pub border_width: f32,

graphics/src/primitive.rs

@@ -41,7 +41,7 @@ pub enum Primitive {
         /// The background of the quad
         background: Background,
         /// The border radius of the quad
-        border_radius: f32,
+        border_radius: [f32; 4],
         /// The border width of the quad
         border_width: f32,
         /// The border color of the quad

graphics/src/renderer.rs

@@ -109,7 +109,7 @@ where
         self.primitives.push(Primitive::Quad {
             bounds: quad.bounds,
             background: background.into(),
-            border_radius: quad.border_radius,
+            border_radius: quad.border_radius.to_array(),
             border_width: quad.border_width,
             border_color: quad.border_color,
         });