package draw

Import Path
	image/draw (on golang.org and go.dev)

Dependency Relation
	imports 3 packages, and imported by one package

Involved Source Files
	d-> draw.go

Exported Type Names

	type Drawer (interface)
		Drawer contains the Draw method.

		One Exported Method
			( T) Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point)
				Draw aligns r.Min in dst with sp in src and then replaces the
				rectangle r in dst with the result of drawing src on dst.

		Implemented By (1+)
			Op
		As Types Of (1+)
			  var FloydSteinberg
	type Image (interface)
		Image is an image.Image with a Set method to change a single pixel.

		Exported Methods (4)
			( T) At(x, y int) color.Color
				At returns the color of the pixel at (x, y).
				At(Bounds().Min.X, Bounds().Min.Y) returns the upper-left pixel of the grid.
				At(Bounds().Max.X-1, Bounds().Max.Y-1) returns the lower-right one.

			( T) Bounds() image.Rectangle
				Bounds returns the domain for which At can return non-zero color.
				The bounds do not necessarily contain the point (0, 0).

			( T) ColorModel() color.Model
				ColorModel returns the Image's color model.

			( T) Set(x, y int, c color.Color)
		Implemented By (10+)
			image.(*Alpha)
			image.(*Alpha16)
			image.(*CMYK)
			image.(*Gray)
			image.(*Gray16)
			image.(*NRGBA)
			image.(*NRGBA64)
			image.(*Paletted)
			image.(*RGBA)
			image.(*RGBA64)
		Implements (1+)
			 T : image.Image
		As Inputs Of (4+)
			func Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point, op Op)
			func DrawMask(dst Image, r image.Rectangle, src image.Image, sp image.Point, mask image.Image, mp image.Point, op Op)
			func Drawer.Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point)
			func Op.Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point)
	type Op int
		Op is a Porter-Duff compositing operator.

		One Exported Method
			( T) Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point)
				Draw implements the Drawer interface by calling the Draw function with this
				Op.

		Implements (1+)
			 T : Drawer
		As Inputs Of (2+)
			func Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point, op Op)
			func DrawMask(dst Image, r image.Rectangle, src image.Image, sp image.Point, mask image.Image, mp image.Point, op Op)
		As Types Of (2+)
			const Over
			const Src
	type Quantizer (interface)
		Quantizer produces a palette for an image.

		One Exported Method
			( T) Quantize(p color.Palette, m image.Image) color.Palette
				Quantize appends up to cap(p) - len(p) colors to p and returns the
				updated palette suitable for converting m to a paletted image.

Exported Values

	 func Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point, op Op)
		Draw calls DrawMask with a nil mask.
	 func DrawMask(dst Image, r image.Rectangle, src image.Image, sp image.Point, mask image.Image, mp image.Point, op Op)
		DrawMask aligns r.Min in dst with sp in src and mp in mask and then replaces the rectangle r
		in dst with the result of a Porter-Duff composition. A nil mask is treated as opaque.
	  var FloydSteinberg Drawer
		FloydSteinberg is a Drawer that is the Src Op with Floyd-Steinberg error
		diffusion.
	const Over Op = 0
		Over specifies ``(src in mask) over dst''.
	const Src Op = 1
		Src specifies ``src in mask''.

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