Interface Canvas

vg/vg.go:21–85

A Canvas is the main drawing interface for 2D vector graphics. The origin is in the bottom left corner.

// graphics.
// The origin is in the bottom left corner.
type Canvas interface {
	// SetLineWidth sets the width of stroked paths.
	// If the width is not positive then stroked lines
	// are not drawn.
	//
	// The initial line width is 1 point.
	SetLineWidth(Length)

	// SetLineDash sets the dash pattern for lines.
	// The pattern slice specifies the lengths of
	// alternating dashes and gaps, and the offset
	// specifies the distance into the dash pattern
	// to start the dash.
	//
	// The initial dash pattern is a solid line.
	SetLineDash(pattern []Length, offset Length)

	// SetColor sets the current drawing color.
	// Note that fill color and stroke color are
	// the same, so if you want different fill
	// and stroke colors then you must set a color,
	// draw fills, set a new color and then draw lines.
	//
	// The initial color is black.
	// If SetColor is called with a nil color then black is used.
	SetColor(color.Color)

	// Rotate applies a rotation transform to the context.
	// The parameter is specified in radians.
	Rotate(rad float64)

	// Translate applies a translational transform
	// to the context.
	Translate(pt Point)

	// Scale applies a scaling transform to the
	// context.
	Scale(x, y float64)

	// Push saves the current line width, the
	// current dash pattern, the current
	// transforms, and the current color
	// onto a stack so that the state can later
	// be restored by calling Pop().
	Push()

	// Pop restores the context saved by the
	// corresponding call to Push().
	Pop()

	// Stroke strokes the given path.
	Stroke(Path)

	// Fill fills the given path.
	Fill(Path)

	// FillString fills in text at the specified
	// location using the given font.