if err == io.EOF {
				err = io.ErrUnexpectedEOF
			}
			return nil, err
		}
	}
	return d.img, nil
}

// DecodeConfig returns the color model and dimensions of a PNG image without
// decoding the entire image.
func DecodeConfig(r io.Reader) (image.Config, error) {
	d := &decoder{
		r:   r,
		crc: crc32.NewIEEE(),
	}
	if err := d.checkHeader(); err != nil {
		if err == io.EOF {

	}
}

func BenchmarkDecode(b *testing.B) {
	data, err := os.ReadFile("../testdata/video-001.gif")
	if err != nil {
		b.Fatal(err)
	}
	cfg, err := DecodeConfig(bytes.NewReader(data))
	if err != nil {
		b.Fatal(err)
	}
	b.SetBytes(int64(cfg.Width * cfg.Height))
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		Decode(bytes.NewReader(data))
	}

// store them. When operating on arbitrary images, [DecodeConfig] should be called
// before [Decode], so that the program can decide whether the image, as defined
// in the returned header, can be safely decoded with the available resources. A
// call to [Decode] which produces an extremely large image, as defined in the
// header returned by [DecodeConfig], is not considered a security issue,

		}
	}
}

func benchmarkDecode(b *testing.B, filename string) {
	data, err := os.ReadFile(filename)
	if err != nil {
		b.Fatal(err)
	}
	cfg, err := DecodeConfig(bytes.NewReader(data))
	if err != nil {
		b.Fatal(err)
	}
	b.SetBytes(int64(cfg.Width * cfg.Height * 4))
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		Decode(bytes.NewReader(data))

		{"CMYK.Rect", Field, 5},
		{"CMYK.Stride", Field, 5},
		{"Config", Type, 0},
		{"Config.ColorModel", Field, 0},
		{"Config.Height", Field, 0},
		{"Config.Width", Field, 0},
		{"Decode", Func, 0},
		{"DecodeConfig", Func, 0},
		{"ErrFormat", Var, 0},
		{"Gray", Type, 0},
		{"Gray.Pix", Field, 0},
		{"Gray.Rect", Field, 0},
		{"Gray.Stride", Field, 0},
		{"Gray16", Type, 0},
		{"Gray16.Pix", Field, 0},

pkg image, const YCbCrSubsampleRatio422 YCbCrSubsampleRatio
pkg image, const YCbCrSubsampleRatio444 YCbCrSubsampleRatio
pkg image, func Decode(io.Reader) (Image, string, error)
pkg image, func DecodeConfig(io.Reader) (Config, string, error)
pkg image, func NewAlpha(Rectangle) *Alpha
pkg image, func NewAlpha16(Rectangle) *Alpha16
pkg image, func NewGray(Rectangle) *Gray
pkg image, func NewGray16(Rectangle) *Gray16