affine

type ColorM interface {
	String() string

	IsIdentity() bool
	ScaleOnly() bool
	At(i, j int) float32
	Elements(body []float32, translate []float32)
	Apply(clr color.Color) color.Color

	// IsInvertible returns a boolean value indicating
	// whether the matrix c is invertible or not.
	IsInvertible() bool

	// Invert inverts the matrix.
	// If c is not invertible, Invert panics.
	Invert() ColorM

	Equals(other ColorM) bool

	// Concat multiplies a color matrix with the other color matrix.
	// This is same as muptiplying the matrix other and the matrix c in this order.
	Concat(other ColorM) ColorM

	// Scale scales the matrix by (r, g, b, a).
	Scale(r, g, b, a float32) ColorM

	// Translate translates the matrix by (r, g, b, a).
	Translate(r, g, b, a float32) ColorM
	// contains filtered or unexported methods
}

type ColorMIdentity struct{}