g := (0xffff - uint32(c.M)*0x101) * w / 0xffff
	b := (0xffff - uint32(c.Y)*0x101) * w / 0xffff
	return r, g, b, 0xffff
}

// CMYKModel is the [Model] for CMYK colors.
var CMYKModel Model = ModelFunc(cmykModel)

func cmykModel(c Color) Color {
	if _, ok := c.(CMYK); ok {
		return c
	}
	r, g, b, _ := c.RGBA()
	cc, mm, yy, kk := RGBToCMYK(uint8(r>>8), uint8(g>>8), uint8(b>>8))

	// Stride is the Pix stride (in bytes) between vertically adjacent pixels.
	Stride int
	// Rect is the image's bounds.
	Rect Rectangle
}

func (p *CMYK) ColorModel() color.Model { return color.CMYKModel }

func (p *CMYK) Bounds() Rectangle { return p.Rect }

func (p *CMYK) At(x, y int) color.Color {
	return p.CMYKAt(x, y)
}

func (p *CMYK) RGBA64At(x, y int) color.RGBA64 {

			cm = color.RGBAModel
		}
		return image.Config{
			ColorModel: cm,
			Width:      d.width,
			Height:     d.height,
		}, nil
	case 4:
		return image.Config{
			ColorModel: color.CMYKModel,
			Width:      d.width,
			Height:     d.height,
		}, nil
	}
	return image.Config{}, FormatError("missing SOF marker")
}

func init() {