package jpeg

import (
	"image"
)

// makeImg allocates and initializes the destination image.
func (d *decoder) makeImg(mxx, myy int) {
	if d.nComp == 1 {
		m := image.NewGray(image.Rect(0, 0, 8*mxx, 8*myy))
		d.img1 = m.SubImage(image.Rect(0, 0, d.width, d.height)).(*image.Gray)
		return
	}

	h0 := d.comp[0].h
	v0 := d.comp[0].v
	hRatio := h0 / d.comp[1].h
	vRatio := v0 / d.comp[1].v

		Stride: p.Stride,
		Rect:   r,
	}
}

// Opaque scans the entire image and reports whether it is fully opaque.
func (p *Gray) Opaque() bool {
	return true
}

// NewGray returns a new [Gray] image with the given bounds.
func NewGray(r Rectangle) *Gray {
	return &Gray{
		Pix:    make([]uint8, pixelBufferLength(1, r, "Gray")),
		Stride: 1 * r.Dx(),
		Rect:   r,
	}
}

	}
	for y := 0; y < 16; y++ {
		for x := 0; x < 16; x++ {
			m.Cr[y*m.CStride+x] = uint8(y * 0x11)
		}
	}
	return m
}

func vgradGray() image.Image {
	m := image.NewGray(image.Rect(0, 0, 16, 16))
	for y := 0; y < 16; y++ {
		for x := 0; x < 16; x++ {
			m.Set(x, y, color.Gray{uint8(y * 0x11)})
		}
	}
	return m
}

func vgradMagenta() image.Image {

	}
	switch d.cb {
	case cbG1, cbG2, cbG4, cbG8:
		bitsPerPixel = d.depth
		if d.useTransparent {
			nrgba = image.NewNRGBA(image.Rect(0, 0, width, height))
			img = nrgba
		} else {
			gray = image.NewGray(image.Rect(0, 0, width, height))
			img = gray
		}
	case cbGA8:
		bitsPerPixel = 16
		nrgba = image.NewNRGBA(image.Rect(0, 0, width, height))
		img = nrgba
	case cbTC8:
		bitsPerPixel = 24