NewAlphaOverPainter creates a new AlphaOverPainter for the given image.

NewAlphaSrcPainter creates a new AlphaSrcPainter for the given image.

NewGammaCorrectionPainter creates a new GammaCorrectionPainter that wraps the given Painter.

NewMonochromePainter creates a new MonochromePainter that wraps the given Painter.

NewRasterizer creates a new Rasterizer with the given bounds.

NewRGBAPainter creates a new RGBAPainter for the given image.

Stroke adds q stroked with the given width to p.

BevelJoiner adds bevel joins to a stroked path.

ButtCapper adds butt caps to a stroked path.

RoundCapper adds round caps to a stroked path.

RoundJoiner adds round joins to a stroked path.

SquareCapper adds square caps to a stroked path.

An AlphaOverPainter is a Painter that paints Spans onto a *image.Alpha using the Over Porter-Duff composition operator.

An AlphaSrcPainter is a Painter that paints Spans onto a *image.Alpha using the Src Porter-Duff composition operator.

A GammaCorrectionPainter wraps another Painter, performing gamma-correction on each Span's alpha value.

A MonochromePainter wraps another Painter, quantizing each Span's alpha to be either fully opaque or fully transparent.

An RGBAPainter is a Painter that paints Spans onto a *image.RGBA.

A Span is a horizontal segment of pixels with constant alpha.

An Adder accumulates points on a curve.

A Capper signifies how to begin or end a stroked path.

A Joiner signifies how to join interior nodes of a stroked path.

A Painter knows how to paint a batch of Spans.

The CapperFunc type adapts an ordinary function to be a Capper.

The JoinerFunc type adapts an ordinary function to be a Joiner.

The PainterFunc type adapts an ordinary function to the Painter interface.

A Path is a sequence of curves, and a curve is a start point followed by a sequence of linear, quadratic or cubic segments.