Snapshot.appendBorder

void appendBorder(gsk.rounded_rect.RoundedRect outline, float[] borderWidth, gdk.rgba.RGBA[] borderColor)

Appends a stroked border rectangle inside the given outline.

The four sides of the border can have different widths and colors.

Parameters

outlinethe outline of the border
borderWidththe stroke width of the border on the top, right, bottom and left side respectively.
borderColorthe color used on the top, right, bottom and left side.