Struct write_fonts::pens::ReverseContourPen

pub struct ReverseContourPen<'a, T: Pen> { /* private fields */ }

Buffers commands until a close is seen, then plays in reverse on inner pen.

Reverses the winding direction of the contour. Keeps the first point unchanged. In FontTools terms we implement only reversedContour(…, outputImpliedClosingLine=True) as this appears to be necessary to ensure retention of interpolation.

https://github.com/fonttools/fonttools/blob/78e10d8b42095b709cd4125e592d914d3ed1558e/Lib/fontTools/pens/reverseContourPen.py#L8

Implementations

impl<'a, T: Pen> ReverseContourPen<'a, T>

pub fn new(inner_pen: &'a mut T) -> ReverseContourPen<'_, T>

pub fn flush(&mut self) -> Result<(), ContourReversalError>

Flush buffer into inner, reversing the winding order.

If start == end, as is typically in a [move, …, close] structure, start point is unchanged.

Requires an explicit call to afford the client the opportunity to receive errors.

Trait Implementations

impl<'a, T: Pen> Pen for ReverseContourPen<'a, T>

fn move_to(&mut self, x: f32, y: f32)

Emit a command to begin a new subpath at (x, y).

fn line_to(&mut self, x: f32, y: f32)

Emit a line segment from the current point to (x, y).

fn quad_to(&mut self, cx0: f32, cy0: f32, x: f32, y: f32)

Emit a quadratic bezier segment from the current point with a control point at (cx0, cy0) and ending at (x, y).

fn curve_to(&mut self, cx0: f32, cy0: f32, cx1: f32, cy1: f32, x: f32, y: f32)

Emit a cubic bezier segment from the current point with control points at (cx0, cy0) and (cx1, cy1) and ending at (x, y).

fn close(&mut self)

Emit a command to close the current subpath.