draw

type Image interface {
	Bounds() geometry.Rect

	// Draw the image on the target that imported it.
	// The drawn image is transforming by the matrix m and then by the current target-wide matrix.
	// The anchor is understood to use the same coordinate system as the bounds do.
	Draw(m geometry.Mat, anchor geometry.Vec)
}

type Target interface {
	Clear(c color.Color)
	SetMatrix(m geometry.Mat)
	Import(img image.Image) Image
}