Update dependencies (#1610)

* Update dependencies

* Update module to go 1.17

1 files changed, 0 insertions, 709 deletions

diff --git a/vendor/golang.org/x/image/tiff/reader.go b/vendor/golang.org/x/image/tiff/reader.go
deleted file mode 100644
index de73f4b9..00000000
--- a/vendor/golang.org/x/image/tiff/reader.go
+++ /dev/null
@@ -1,709 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package tiff implements a TIFF image decoder and encoder.
-//
-// The TIFF specification is at http://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf
-package tiff // import "golang.org/x/image/tiff"
-
-import (
-	"compress/zlib"
-	"encoding/binary"
-	"fmt"
-	"image"
-	"image/color"
-	"io"
-	"io/ioutil"
-	"math"
-
-	"golang.org/x/image/ccitt"
-	"golang.org/x/image/tiff/lzw"
-)
-
-// A FormatError reports that the input is not a valid TIFF image.
-type FormatError string
-
-func (e FormatError) Error() string {
-	return "tiff: invalid format: " + string(e)
-}
-
-// An UnsupportedError reports that the input uses a valid but
-// unimplemented feature.
-type UnsupportedError string
-
-func (e UnsupportedError) Error() string {
-	return "tiff: unsupported feature: " + string(e)
-}
-
-var errNoPixels = FormatError("not enough pixel data")
-
-type decoder struct {
-	r         io.ReaderAt
-	byteOrder binary.ByteOrder
-	config    image.Config
-	mode      imageMode
-	bpp       uint
-	features  map[int][]uint
-	palette   []color.Color
-
-	buf   []byte
-	off   int    // Current offset in buf.
-	v     uint32 // Buffer value for reading with arbitrary bit depths.
-	nbits uint   // Remaining number of bits in v.
-}
-
-// firstVal returns the first uint of the features entry with the given tag,
-// or 0 if the tag does not exist.
-func (d *decoder) firstVal(tag int) uint {
-	f := d.features[tag]
-	if len(f) == 0 {
-		return 0
-	}
-	return f[0]
-}
-
-// ifdUint decodes the IFD entry in p, which must be of the Byte, Short
-// or Long type, and returns the decoded uint values.
-func (d *decoder) ifdUint(p []byte) (u []uint, err error) {
-	var raw []byte
-	if len(p) < ifdLen {
-		return nil, FormatError("bad IFD entry")
-	}
-
-	datatype := d.byteOrder.Uint16(p[2:4])
-	if dt := int(datatype); dt <= 0 || dt >= len(lengths) {
-		return nil, UnsupportedError("IFD entry datatype")
-	}
-
-	count := d.byteOrder.Uint32(p[4:8])
-	if count > math.MaxInt32/lengths[datatype] {
-		return nil, FormatError("IFD data too large")
-	}
-	if datalen := lengths[datatype] * count; datalen > 4 {
-		// The IFD contains a pointer to the real value.
-		raw = make([]byte, datalen)
-		_, err = d.r.ReadAt(raw, int64(d.byteOrder.Uint32(p[8:12])))
-	} else {
-		raw = p[8 : 8+datalen]
-	}
-	if err != nil {
-		return nil, err
-	}
-
-	u = make([]uint, count)
-	switch datatype {
-	case dtByte:
-		for i := uint32(0); i < count; i++ {
-			u[i] = uint(raw[i])
-		}
-	case dtShort:
-		for i := uint32(0); i < count; i++ {
-			u[i] = uint(d.byteOrder.Uint16(raw[2*i : 2*(i+1)]))
-		}
-	case dtLong:
-		for i := uint32(0); i < count; i++ {
-			u[i] = uint(d.byteOrder.Uint32(raw[4*i : 4*(i+1)]))
-		}
-	default:
-		return nil, UnsupportedError("data type")
-	}
-	return u, nil
-}
-
-// parseIFD decides whether the IFD entry in p is "interesting" and
-// stows away the data in the decoder. It returns the tag number of the
-// entry and an error, if any.
-func (d *decoder) parseIFD(p []byte) (int, error) {
-	tag := d.byteOrder.Uint16(p[0:2])
-	switch tag {
-	case tBitsPerSample,
-		tExtraSamples,
-		tPhotometricInterpretation,
-		tCompression,
-		tPredictor,
-		tStripOffsets,
-		tStripByteCounts,
-		tRowsPerStrip,
-		tTileWidth,
-		tTileLength,
-		tTileOffsets,
-		tTileByteCounts,
-		tImageLength,
-		tImageWidth,
-		tFillOrder,
-		tT4Options,
-		tT6Options:
-		val, err := d.ifdUint(p)
-		if err != nil {
-			return 0, err
-		}
-		d.features[int(tag)] = val
-	case tColorMap:
-		val, err := d.ifdUint(p)
-		if err != nil {
-			return 0, err
-		}
-		numcolors := len(val) / 3
-		if len(val)%3 != 0 || numcolors <= 0 || numcolors > 256 {
-			return 0, FormatError("bad ColorMap length")
-		}
-		d.palette = make([]color.Color, numcolors)
-		for i := 0; i < numcolors; i++ {
-			d.palette[i] = color.RGBA64{
-				uint16(val[i]),
-				uint16(val[i+numcolors]),
-				uint16(val[i+2*numcolors]),
-				0xffff,
-			}
-		}
-	case tSampleFormat:
-		// Page 27 of the spec: If the SampleFormat is present and
-		// the value is not 1 [= unsigned integer data], a Baseline
-		// TIFF reader that cannot handle the SampleFormat value
-		// must terminate the import process gracefully.
-		val, err := d.ifdUint(p)
-		if err != nil {
-			return 0, err
-		}
-		for _, v := range val {
-			if v != 1 {
-				return 0, UnsupportedError("sample format")
-			}
-		}
-	}
-	return int(tag), nil
-}
-
-// readBits reads n bits from the internal buffer starting at the current offset.
-func (d *decoder) readBits(n uint) (v uint32, ok bool) {
-	for d.nbits < n {
-		d.v <<= 8
-		if d.off >= len(d.buf) {
-			return 0, false
-		}
-		d.v |= uint32(d.buf[d.off])
-		d.off++
-		d.nbits += 8
-	}
-	d.nbits -= n
-	rv := d.v >> d.nbits
-	d.v &^= rv << d.nbits
-	return rv, true
-}
-
-// flushBits discards the unread bits in the buffer used by readBits.
-// It is used at the end of a line.
-func (d *decoder) flushBits() {
-	d.v = 0
-	d.nbits = 0
-}
-
-// minInt returns the smaller of x or y.
-func minInt(a, b int) int {
-	if a <= b {
-		return a
-	}
-	return b
-}
-
-// decode decodes the raw data of an image.
-// It reads from d.buf and writes the strip or tile into dst.
-func (d *decoder) decode(dst image.Image, xmin, ymin, xmax, ymax int) error {
-	d.off = 0
-
-	// Apply horizontal predictor if necessary.
-	// In this case, p contains the color difference to the preceding pixel.
-	// See page 64-65 of the spec.
-	if d.firstVal(tPredictor) == prHorizontal {
-		switch d.bpp {
-		case 16:
-			var off int
-			n := 2 * len(d.features[tBitsPerSample]) // bytes per sample times samples per pixel
-			for y := ymin; y < ymax; y++ {
-				off += n
-				for x := 0; x < (xmax-xmin-1)*n; x += 2 {
-					if off+2 > len(d.buf) {
-						return errNoPixels
-					}
-					v0 := d.byteOrder.Uint16(d.buf[off-n : off-n+2])
-					v1 := d.byteOrder.Uint16(d.buf[off : off+2])
-					d.byteOrder.PutUint16(d.buf[off:off+2], v1+v0)
-					off += 2
-				}
-			}
-		case 8:
-			var off int
-			n := 1 * len(d.features[tBitsPerSample]) // bytes per sample times samples per pixel
-			for y := ymin; y < ymax; y++ {
-				off += n
-				for x := 0; x < (xmax-xmin-1)*n; x++ {
-					if off >= len(d.buf) {
-						return errNoPixels
-					}
-					d.buf[off] += d.buf[off-n]
-					off++
-				}
-			}
-		case 1:
-			return UnsupportedError("horizontal predictor with 1 BitsPerSample")
-		}
-	}
-
-	rMaxX := minInt(xmax, dst.Bounds().Max.X)
-	rMaxY := minInt(ymax, dst.Bounds().Max.Y)
-	switch d.mode {
-	case mGray, mGrayInvert:
-		if d.bpp == 16 {
-			img := dst.(*image.Gray16)
-			for y := ymin; y < rMaxY; y++ {
-				for x := xmin; x < rMaxX; x++ {
-					if d.off+2 > len(d.buf) {
-						return errNoPixels
-					}
-					v := d.byteOrder.Uint16(d.buf[d.off : d.off+2])
-					d.off += 2
-					if d.mode == mGrayInvert {
-						v = 0xffff - v
-					}
-					img.SetGray16(x, y, color.Gray16{v})
-				}
-				if rMaxX == img.Bounds().Max.X {
-					d.off += 2 * (xmax - img.Bounds().Max.X)
-				}
-			}
-		} else {
-			img := dst.(*image.Gray)
-			max := uint32((1 << d.bpp) - 1)
-			for y := ymin; y < rMaxY; y++ {
-				for x := xmin; x < rMaxX; x++ {
-					v, ok := d.readBits(d.bpp)
-					if !ok {
-						return errNoPixels
-					}
-					v = v * 0xff / max
-					if d.mode == mGrayInvert {
-						v = 0xff - v
-					}
-					img.SetGray(x, y, color.Gray{uint8(v)})
-				}
-				d.flushBits()
-			}
-		}
-	case mPaletted:
-		img := dst.(*image.Paletted)
-		for y := ymin; y < rMaxY; y++ {
-			for x := xmin; x < rMaxX; x++ {
-				v, ok := d.readBits(d.bpp)
-				if !ok {
-					return errNoPixels
-				}
-				img.SetColorIndex(x, y, uint8(v))
-			}
-			d.flushBits()
-		}
-	case mRGB:
-		if d.bpp == 16 {
-			img := dst.(*image.RGBA64)
-			for y := ymin; y < rMaxY; y++ {
-				for x := xmin; x < rMaxX; x++ {
-					if d.off+6 > len(d.buf) {
-						return errNoPixels
-					}
-					r := d.byteOrder.Uint16(d.buf[d.off+0 : d.off+2])
-					g := d.byteOrder.Uint16(d.buf[d.off+2 : d.off+4])
-					b := d.byteOrder.Uint16(d.buf[d.off+4 : d.off+6])
-					d.off += 6
-					img.SetRGBA64(x, y, color.RGBA64{r, g, b, 0xffff})
-				}
-			}
-		} else {
-			img := dst.(*image.RGBA)
-			for y := ymin; y < rMaxY; y++ {
-				min := img.PixOffset(xmin, y)
-				max := img.PixOffset(rMaxX, y)
-				off := (y - ymin) * (xmax - xmin) * 3
-				for i := min; i < max; i += 4 {
-					if off+3 > len(d.buf) {
-						return errNoPixels
-					}
-					img.Pix[i+0] = d.buf[off+0]
-					img.Pix[i+1] = d.buf[off+1]
-					img.Pix[i+2] = d.buf[off+2]
-					img.Pix[i+3] = 0xff
-					off += 3
-				}
-			}
-		}
-	case mNRGBA:
-		if d.bpp == 16 {
-			img := dst.(*image.NRGBA64)
-			for y := ymin; y < rMaxY; y++ {
-				for x := xmin; x < rMaxX; x++ {
-					if d.off+8 > len(d.buf) {
-						return errNoPixels
-					}
-					r := d.byteOrder.Uint16(d.buf[d.off+0 : d.off+2])
-					g := d.byteOrder.Uint16(d.buf[d.off+2 : d.off+4])
-					b := d.byteOrder.Uint16(d.buf[d.off+4 : d.off+6])
-					a := d.byteOrder.Uint16(d.buf[d.off+6 : d.off+8])
-					d.off += 8
-					img.SetNRGBA64(x, y, color.NRGBA64{r, g, b, a})
-				}
-			}
-		} else {
-			img := dst.(*image.NRGBA)
-			for y := ymin; y < rMaxY; y++ {
-				min := img.PixOffset(xmin, y)
-				max := img.PixOffset(rMaxX, y)
-				i0, i1 := (y-ymin)*(xmax-xmin)*4, (y-ymin+1)*(xmax-xmin)*4
-				if i1 > len(d.buf) {
-					return errNoPixels
-				}
-				copy(img.Pix[min:max], d.buf[i0:i1])
-			}
-		}
-	case mRGBA:
-		if d.bpp == 16 {
-			img := dst.(*image.RGBA64)
-			for y := ymin; y < rMaxY; y++ {
-				for x := xmin; x < rMaxX; x++ {
-					if d.off+8 > len(d.buf) {
-						return errNoPixels
-					}
-					r := d.byteOrder.Uint16(d.buf[d.off+0 : d.off+2])
-					g := d.byteOrder.Uint16(d.buf[d.off+2 : d.off+4])
-					b := d.byteOrder.Uint16(d.buf[d.off+4 : d.off+6])
-					a := d.byteOrder.Uint16(d.buf[d.off+6 : d.off+8])
-					d.off += 8
-					img.SetRGBA64(x, y, color.RGBA64{r, g, b, a})
-				}
-			}
-		} else {
-			img := dst.(*image.RGBA)
-			for y := ymin; y < rMaxY; y++ {
-				min := img.PixOffset(xmin, y)
-				max := img.PixOffset(rMaxX, y)
-				i0, i1 := (y-ymin)*(xmax-xmin)*4, (y-ymin+1)*(xmax-xmin)*4
-				if i1 > len(d.buf) {
-					return errNoPixels
-				}
-				copy(img.Pix[min:max], d.buf[i0:i1])
-			}
-		}
-	}
-
-	return nil
-}
-
-func newDecoder(r io.Reader) (*decoder, error) {
-	d := &decoder{
-		r:        newReaderAt(r),
-		features: make(map[int][]uint),
-	}
-
-	p := make([]byte, 8)
-	if _, err := d.r.ReadAt(p, 0); err != nil {
-		if err == io.EOF {
-			err = io.ErrUnexpectedEOF
-		}
-		return nil, err
-	}
-	switch string(p[0:4]) {
-	case leHeader:
-		d.byteOrder = binary.LittleEndian
-	case beHeader:
-		d.byteOrder = binary.BigEndian
-	default:
-		return nil, FormatError("malformed header")
-	}
-
-	ifdOffset := int64(d.byteOrder.Uint32(p[4:8]))
-
-	// The first two bytes contain the number of entries (12 bytes each).
-	if _, err := d.r.ReadAt(p[0:2], ifdOffset); err != nil {
-		return nil, err
-	}
-	numItems := int(d.byteOrder.Uint16(p[0:2]))
-
-	// All IFD entries are read in one chunk.
-	p = make([]byte, ifdLen*numItems)
-	if _, err := d.r.ReadAt(p, ifdOffset+2); err != nil {
-		return nil, err
-	}
-
-	prevTag := -1
-	for i := 0; i < len(p); i += ifdLen {
-		tag, err := d.parseIFD(p[i : i+ifdLen])
-		if err != nil {
-			return nil, err
-		}
-		if tag <= prevTag {
-			return nil, FormatError("tags are not sorted in ascending order")
-		}
-		prevTag = tag
-	}
-
-	d.config.Width = int(d.firstVal(tImageWidth))
-	d.config.Height = int(d.firstVal(tImageLength))
-
-	if _, ok := d.features[tBitsPerSample]; !ok {
-		// Default is 1 per specification.
-		d.features[tBitsPerSample] = []uint{1}
-	}
-	d.bpp = d.firstVal(tBitsPerSample)
-	switch d.bpp {
-	case 0:
-		return nil, FormatError("BitsPerSample must not be 0")
-	case 1, 8, 16:
-		// Nothing to do, these are accepted by this implementation.
-	default:
-		return nil, UnsupportedError(fmt.Sprintf("BitsPerSample of %v", d.bpp))
-	}
-
-	// Determine the image mode.
-	switch d.firstVal(tPhotometricInterpretation) {
-	case pRGB:
-		if d.bpp == 16 {
-			for _, b := range d.features[tBitsPerSample] {
-				if b != 16 {
-					return nil, FormatError("wrong number of samples for 16bit RGB")
-				}
-			}
-		} else {
-			for _, b := range d.features[tBitsPerSample] {
-				if b != 8 {
-					return nil, FormatError("wrong number of samples for 8bit RGB")
-				}
-			}
-		}
-		// RGB images normally have 3 samples per pixel.
-		// If there are more, ExtraSamples (p. 31-32 of the spec)
-		// gives their meaning (usually an alpha channel).
-		//
-		// This implementation does not support extra samples
-		// of an unspecified type.
-		switch len(d.features[tBitsPerSample]) {
-		case 3:
-			d.mode = mRGB
-			if d.bpp == 16 {
-				d.config.ColorModel = color.RGBA64Model
-			} else {
-				d.config.ColorModel = color.RGBAModel
-			}
-		case 4:
-			switch d.firstVal(tExtraSamples) {
-			case 1:
-				d.mode = mRGBA
-				if d.bpp == 16 {
-					d.config.ColorModel = color.RGBA64Model
-				} else {
-					d.config.ColorModel = color.RGBAModel
-				}
-			case 2:
-				d.mode = mNRGBA
-				if d.bpp == 16 {
-					d.config.ColorModel = color.NRGBA64Model
-				} else {
-					d.config.ColorModel = color.NRGBAModel
-				}
-			default:
-				return nil, FormatError("wrong number of samples for RGB")
-			}
-		default:
-			return nil, FormatError("wrong number of samples for RGB")
-		}
-	case pPaletted:
-		d.mode = mPaletted
-		d.config.ColorModel = color.Palette(d.palette)
-	case pWhiteIsZero:
-		d.mode = mGrayInvert
-		if d.bpp == 16 {
-			d.config.ColorModel = color.Gray16Model
-		} else {
-			d.config.ColorModel = color.GrayModel
-		}
-	case pBlackIsZero:
-		d.mode = mGray
-		if d.bpp == 16 {
-			d.config.ColorModel = color.Gray16Model
-		} else {
-			d.config.ColorModel = color.GrayModel
-		}
-	default:
-		return nil, UnsupportedError("color model")
-	}
-
-	return d, nil
-}
-
-// DecodeConfig returns the color model and dimensions of a TIFF image without
-// decoding the entire image.
-func DecodeConfig(r io.Reader) (image.Config, error) {
-	d, err := newDecoder(r)
-	if err != nil {
-		return image.Config{}, err
-	}
-	return d.config, nil
-}
-
-func ccittFillOrder(tiffFillOrder uint) ccitt.Order {
-	if tiffFillOrder == 2 {
-		return ccitt.LSB
-	}
-	return ccitt.MSB
-}
-
-// Decode reads a TIFF image from r and returns it as an image.Image.
-// The type of Image returned depends on the contents of the TIFF.
-func Decode(r io.Reader) (img image.Image, err error) {
-	d, err := newDecoder(r)
-	if err != nil {
-		return
-	}
-
-	blockPadding := false
-	blockWidth := d.config.Width
-	blockHeight := d.config.Height
-	blocksAcross := 1
-	blocksDown := 1
-
-	if d.config.Width == 0 {
-		blocksAcross = 0
-	}
-	if d.config.Height == 0 {
-		blocksDown = 0
-	}
-
-	var blockOffsets, blockCounts []uint
-
-	if int(d.firstVal(tTileWidth)) != 0 {
-		blockPadding = true
-
-		blockWidth = int(d.firstVal(tTileWidth))
-		blockHeight = int(d.firstVal(tTileLength))
-
-		if blockWidth != 0 {
-			blocksAcross = (d.config.Width + blockWidth - 1) / blockWidth
-		}
-		if blockHeight != 0 {
-			blocksDown = (d.config.Height + blockHeight - 1) / blockHeight
-		}
-
-		blockCounts = d.features[tTileByteCounts]
-		blockOffsets = d.features[tTileOffsets]
-
-	} else {
-		if int(d.firstVal(tRowsPerStrip)) != 0 {
-			blockHeight = int(d.firstVal(tRowsPerStrip))
-		}
-
-		if blockHeight != 0 {
-			blocksDown = (d.config.Height + blockHeight - 1) / blockHeight
-		}
-
-		blockOffsets = d.features[tStripOffsets]
-		blockCounts = d.features[tStripByteCounts]
-	}
-
-	// Check if we have the right number of strips/tiles, offsets and counts.
-	if n := blocksAcross * blocksDown; len(blockOffsets) < n || len(blockCounts) < n {
-		return nil, FormatError("inconsistent header")
-	}
-
-	imgRect := image.Rect(0, 0, d.config.Width, d.config.Height)
-	switch d.mode {
-	case mGray, mGrayInvert:
-		if d.bpp == 16 {
-			img = image.NewGray16(imgRect)
-		} else {
-			img = image.NewGray(imgRect)
-		}
-	case mPaletted:
-		img = image.NewPaletted(imgRect, d.palette)
-	case mNRGBA:
-		if d.bpp == 16 {
-			img = image.NewNRGBA64(imgRect)
-		} else {
-			img = image.NewNRGBA(imgRect)
-		}
-	case mRGB, mRGBA:
-		if d.bpp == 16 {
-			img = image.NewRGBA64(imgRect)
-		} else {
-			img = image.NewRGBA(imgRect)
-		}
-	}
-
-	for i := 0; i < blocksAcross; i++ {
-		blkW := blockWidth
-		if !blockPadding && i == blocksAcross-1 && d.config.Width%blockWidth != 0 {
-			blkW = d.config.Width % blockWidth
-		}
-		for j := 0; j < blocksDown; j++ {
-			blkH := blockHeight
-			if !blockPadding && j == blocksDown-1 && d.config.Height%blockHeight != 0 {
-				blkH = d.config.Height % blockHeight
-			}
-			offset := int64(blockOffsets[j*blocksAcross+i])
-			n := int64(blockCounts[j*blocksAcross+i])
-			switch d.firstVal(tCompression) {
-
-			// According to the spec, Compression does not have a default value,
-			// but some tools interpret a missing Compression value as none so we do
-			// the same.
-			case cNone, 0:
-				if b, ok := d.r.(*buffer); ok {
-					d.buf, err = b.Slice(int(offset), int(n))
-				} else {
-					d.buf = make([]byte, n)
-					_, err = d.r.ReadAt(d.buf, offset)
-				}
-			case cG3:
-				inv := d.firstVal(tPhotometricInterpretation) == pWhiteIsZero
-				order := ccittFillOrder(d.firstVal(tFillOrder))
-				r := ccitt.NewReader(io.NewSectionReader(d.r, offset, n), order, ccitt.Group3, blkW, blkH, &ccitt.Options{Invert: inv, Align: false})
-				d.buf, err = ioutil.ReadAll(r)
-			case cG4:
-				inv := d.firstVal(tPhotometricInterpretation) == pWhiteIsZero
-				order := ccittFillOrder(d.firstVal(tFillOrder))
-				r := ccitt.NewReader(io.NewSectionReader(d.r, offset, n), order, ccitt.Group4, blkW, blkH, &ccitt.Options{Invert: inv, Align: false})
-				d.buf, err = ioutil.ReadAll(r)
-			case cLZW:
-				r := lzw.NewReader(io.NewSectionReader(d.r, offset, n), lzw.MSB, 8)
-				d.buf, err = ioutil.ReadAll(r)
-				r.Close()
-			case cDeflate, cDeflateOld:
-				var r io.ReadCloser
-				r, err = zlib.NewReader(io.NewSectionReader(d.r, offset, n))
-				if err != nil {
-					return nil, err
-				}
-				d.buf, err = ioutil.ReadAll(r)
-				r.Close()
-			case cPackBits:
-				d.buf, err = unpackBits(io.NewSectionReader(d.r, offset, n))
-			default:
-				err = UnsupportedError(fmt.Sprintf("compression value %d", d.firstVal(tCompression)))
-			}
-			if err != nil {
-				return nil, err
-			}
-
-			xmin := i * blockWidth
-			ymin := j * blockHeight
-			xmax := xmin + blkW
-			ymax := ymin + blkH
-			err = d.decode(img, xmin, ymin, xmax, ymax)
-			if err != nil {
-				return nil, err
-			}
-		}
-	}
-	return
-}
-
-func init() {
-	image.RegisterFormat("tiff", leHeader, Decode, DecodeConfig)
-	image.RegisterFormat("tiff", beHeader, Decode, DecodeConfig)
-}