Function encode_blurred_rounded_rect 

pub fn encode_blurred_rounded_rect(
    rect: Rect,
    radii: CornerRadii,
    std_dev: f64,
    color: Color,
    transform: Affine,
    encoded_paints: &mut Vec<EncodedPaint>,
) -> Paint

Encode a blurred rounded rectangle into encoded_paints, returning the paint the draw that rasterizes inflated_bounds references.

radii collapses through CornerRadii::largest — see the module doc’s “Radius arity” section for why. transform is the paint transform in effect for the draw, the same composed transform the coverage rectangle is rasterized under; BlurredRoundedRectangle::encode_into folds its inverse into the encoded entry, which is the direction the shader samples in.

Unlike an image, this can never fail: every field a Command::BlurredRoundedRect carries reaches here already checked finite by [super::check_geometry], and vello_common’s own encoding clamps a degenerate radius or a vanishing standard deviation internally rather than refusing them — so, unlike crate::compile::paint::encode_brush’s image arm, there is no skip case for a caller here to route around.