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-rw-r--r--vendor/github.com/disintegration/imaging/effects.go36
-rw-r--r--vendor/github.com/disintegration/imaging/helpers.go272
-rw-r--r--vendor/github.com/disintegration/imaging/io.go463
-rw-r--r--vendor/github.com/disintegration/imaging/tools.go34
4 files changed, 519 insertions, 286 deletions
diff --git a/vendor/github.com/disintegration/imaging/effects.go b/vendor/github.com/disintegration/imaging/effects.go
index b16781f..149cfeb 100644
--- a/vendor/github.com/disintegration/imaging/effects.go
+++ b/vendor/github.com/disintegration/imaging/effects.go
@@ -38,9 +38,13 @@ func blurHorizontal(img image.Image, kernel []float64) *image.NRGBA {
parallel(0, src.h, func(ys <-chan int) {
scanLine := make([]uint8, src.w*4)
+ scanLineF := make([]float64, len(scanLine))
for y := range ys {
src.scan(0, y, src.w, y+1, scanLine)
- for x := 0; x < src.w; x++ {
+ for i, v := range scanLine {
+ scanLineF[i] = float64(v)
+ }
+ for x, idx := 0, 0; x < src.w; x, idx = x+1, idx+4 {
min := x - radius
if min < 0 {
min = 0
@@ -55,10 +59,10 @@ func blurHorizontal(img image.Image, kernel []float64) *image.NRGBA {
i := ix * 4
weight := kernel[absint(x-ix)]
wsum += weight
- wa := float64(scanLine[i+3]) * weight
- r += float64(scanLine[i+0]) * wa
- g += float64(scanLine[i+1]) * wa
- b += float64(scanLine[i+2]) * wa
+ wa := scanLineF[i+3] * weight
+ r += scanLineF[i+0] * wa
+ g += scanLineF[i+1] * wa
+ b += scanLineF[i+2] * wa
a += wa
}
if a != 0 {
@@ -67,12 +71,12 @@ func blurHorizontal(img image.Image, kernel []float64) *image.NRGBA {
b /= a
}
- j := y*dst.Stride + x*4
- dst.Pix[j+0] = clamp(r)
- dst.Pix[j+1] = clamp(g)
- dst.Pix[j+2] = clamp(b)
- dst.Pix[j+3] = clamp(a / wsum)
+ scanLine[idx+0] = clamp(r)
+ scanLine[idx+1] = clamp(g)
+ scanLine[idx+2] = clamp(b)
+ scanLine[idx+3] = clamp(a / wsum)
}
+ copy(dst.Pix[y*dst.Stride:], scanLine)
}
})
@@ -86,8 +90,12 @@ func blurVertical(img image.Image, kernel []float64) *image.NRGBA {
parallel(0, src.w, func(xs <-chan int) {
scanLine := make([]uint8, src.h*4)
+ scanLineF := make([]float64, len(scanLine))
for x := range xs {
src.scan(x, 0, x+1, src.h, scanLine)
+ for i, v := range scanLine {
+ scanLineF[i] = float64(v)
+ }
for y := 0; y < src.h; y++ {
min := y - radius
if min < 0 {
@@ -103,10 +111,10 @@ func blurVertical(img image.Image, kernel []float64) *image.NRGBA {
i := iy * 4
weight := kernel[absint(y-iy)]
wsum += weight
- wa := float64(scanLine[i+3]) * weight
- r += float64(scanLine[i+0]) * wa
- g += float64(scanLine[i+1]) * wa
- b += float64(scanLine[i+2]) * wa
+ wa := scanLineF[i+3] * weight
+ r += scanLineF[i+0] * wa
+ g += scanLineF[i+1] * wa
+ b += scanLineF[i+2] * wa
a += wa
}
if a != 0 {
diff --git a/vendor/github.com/disintegration/imaging/helpers.go b/vendor/github.com/disintegration/imaging/helpers.go
deleted file mode 100644
index dcb4d7e..0000000
--- a/vendor/github.com/disintegration/imaging/helpers.go
+++ /dev/null
@@ -1,272 +0,0 @@
-package imaging
-
-import (
- "bytes"
- "errors"
- "image"
- "image/color"
- "image/draw"
- "image/gif"
- "image/jpeg"
- "image/png"
- "io"
- "os"
- "path/filepath"
- "strings"
-
- "golang.org/x/image/bmp"
- "golang.org/x/image/tiff"
-)
-
-// Format is an image file format.
-type Format int
-
-// Image file formats.
-const (
- JPEG Format = iota
- PNG
- GIF
- TIFF
- BMP
-)
-
-func (f Format) String() string {
- switch f {
- case JPEG:
- return "JPEG"
- case PNG:
- return "PNG"
- case GIF:
- return "GIF"
- case TIFF:
- return "TIFF"
- case BMP:
- return "BMP"
- default:
- return "Unsupported"
- }
-}
-
-var formatFromExt = map[string]Format{
- ".jpg": JPEG,
- ".jpeg": JPEG,
- ".png": PNG,
- ".tif": TIFF,
- ".tiff": TIFF,
- ".bmp": BMP,
- ".gif": GIF,
-}
-
-// FormatFromFilename parses image format from filename extension:
-// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
-func FormatFromFilename(filename string) (Format, error) {
- ext := strings.ToLower(filepath.Ext(filename))
- if f, ok := formatFromExt[ext]; ok {
- return f, nil
- }
- return -1, ErrUnsupportedFormat
-}
-
-var (
- // ErrUnsupportedFormat means the given image format (or file extension) is unsupported.
- ErrUnsupportedFormat = errors.New("imaging: unsupported image format")
-)
-
-type fileSystem interface {
- Create(string) (io.WriteCloser, error)
- Open(string) (io.ReadCloser, error)
-}
-
-type localFS struct{}
-
-func (localFS) Create(name string) (io.WriteCloser, error) { return os.Create(name) }
-func (localFS) Open(name string) (io.ReadCloser, error) { return os.Open(name) }
-
-var fs fileSystem = localFS{}
-
-// Decode reads an image from r.
-func Decode(r io.Reader) (image.Image, error) {
- img, _, err := image.Decode(r)
- return img, err
-}
-
-// Open loads an image from file
-func Open(filename string) (image.Image, error) {
- file, err := fs.Open(filename)
- if err != nil {
- return nil, err
- }
- defer file.Close()
- return Decode(file)
-}
-
-type encodeConfig struct {
- jpegQuality int
- gifNumColors int
- gifQuantizer draw.Quantizer
- gifDrawer draw.Drawer
- pngCompressionLevel png.CompressionLevel
-}
-
-var defaultEncodeConfig = encodeConfig{
- jpegQuality: 95,
- gifNumColors: 256,
- gifQuantizer: nil,
- gifDrawer: nil,
- pngCompressionLevel: png.DefaultCompression,
-}
-
-// EncodeOption sets an optional parameter for the Encode and Save functions.
-type EncodeOption func(*encodeConfig)
-
-// JPEGQuality returns an EncodeOption that sets the output JPEG quality.
-// Quality ranges from 1 to 100 inclusive, higher is better. Default is 95.
-func JPEGQuality(quality int) EncodeOption {
- return func(c *encodeConfig) {
- c.jpegQuality = quality
- }
-}
-
-// GIFNumColors returns an EncodeOption that sets the maximum number of colors
-// used in the GIF-encoded image. It ranges from 1 to 256. Default is 256.
-func GIFNumColors(numColors int) EncodeOption {
- return func(c *encodeConfig) {
- c.gifNumColors = numColors
- }
-}
-
-// GIFQuantizer returns an EncodeOption that sets the quantizer that is used to produce
-// a palette of the GIF-encoded image.
-func GIFQuantizer(quantizer draw.Quantizer) EncodeOption {
- return func(c *encodeConfig) {
- c.gifQuantizer = quantizer
- }
-}
-
-// GIFDrawer returns an EncodeOption that sets the drawer that is used to convert
-// the source image to the desired palette of the GIF-encoded image.
-func GIFDrawer(drawer draw.Drawer) EncodeOption {
- return func(c *encodeConfig) {
- c.gifDrawer = drawer
- }
-}
-
-// PNGCompressionLevel returns an EncodeOption that sets the compression level
-// of the PNG-encoded image. Default is png.DefaultCompression.
-func PNGCompressionLevel(level png.CompressionLevel) EncodeOption {
- return func(c *encodeConfig) {
- c.pngCompressionLevel = level
- }
-}
-
-// Encode writes the image img to w in the specified format (JPEG, PNG, GIF, TIFF or BMP).
-func Encode(w io.Writer, img image.Image, format Format, opts ...EncodeOption) error {
- cfg := defaultEncodeConfig
- for _, option := range opts {
- option(&cfg)
- }
-
- var err error
- switch format {
- case JPEG:
- var rgba *image.RGBA
- if nrgba, ok := img.(*image.NRGBA); ok {
- if nrgba.Opaque() {
- rgba = &image.RGBA{
- Pix: nrgba.Pix,
- Stride: nrgba.Stride,
- Rect: nrgba.Rect,
- }
- }
- }
- if rgba != nil {
- err = jpeg.Encode(w, rgba, &jpeg.Options{Quality: cfg.jpegQuality})
- } else {
- err = jpeg.Encode(w, img, &jpeg.Options{Quality: cfg.jpegQuality})
- }
-
- case PNG:
- enc := png.Encoder{CompressionLevel: cfg.pngCompressionLevel}
- err = enc.Encode(w, img)
-
- case GIF:
- err = gif.Encode(w, img, &gif.Options{
- NumColors: cfg.gifNumColors,
- Quantizer: cfg.gifQuantizer,
- Drawer: cfg.gifDrawer,
- })
-
- case TIFF:
- err = tiff.Encode(w, img, &tiff.Options{Compression: tiff.Deflate, Predictor: true})
-
- case BMP:
- err = bmp.Encode(w, img)
-
- default:
- err = ErrUnsupportedFormat
- }
- return err
-}
-
-// Save saves the image to file with the specified filename.
-// The format is determined from the filename extension: "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
-//
-// Examples:
-//
-// // Save the image as PNG.
-// err := imaging.Save(img, "out.png")
-//
-// // Save the image as JPEG with optional quality parameter set to 80.
-// err := imaging.Save(img, "out.jpg", imaging.JPEGQuality(80))
-//
-func Save(img image.Image, filename string, opts ...EncodeOption) (err error) {
- f, err := FormatFromFilename(filename)
- if err != nil {
- return err
- }
- file, err := fs.Create(filename)
- if err != nil {
- return err
- }
-
- defer func() {
- cerr := file.Close()
- if err == nil {
- err = cerr
- }
- }()
-
- return Encode(file, img, f, opts...)
-}
-
-// New creates a new image with the specified width and height, and fills it with the specified color.
-func New(width, height int, fillColor color.Color) *image.NRGBA {
- if width <= 0 || height <= 0 {
- return &image.NRGBA{}
- }
-
- c := color.NRGBAModel.Convert(fillColor).(color.NRGBA)
- if (c == color.NRGBA{0, 0, 0, 0}) {
- return image.NewNRGBA(image.Rect(0, 0, width, height))
- }
-
- return &image.NRGBA{
- Pix: bytes.Repeat([]byte{c.R, c.G, c.B, c.A}, width*height),
- Stride: 4 * width,
- Rect: image.Rect(0, 0, width, height),
- }
-}
-
-// Clone returns a copy of the given image.
-func Clone(img image.Image) *image.NRGBA {
- src := newScanner(img)
- dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
- size := src.w * 4
- parallel(0, src.h, func(ys <-chan int) {
- for y := range ys {
- i := y * dst.Stride
- src.scan(0, y, src.w, y+1, dst.Pix[i:i+size])
- }
- })
- return dst
-}
diff --git a/vendor/github.com/disintegration/imaging/io.go b/vendor/github.com/disintegration/imaging/io.go
new file mode 100644
index 0000000..557bf2f
--- /dev/null
+++ b/vendor/github.com/disintegration/imaging/io.go
@@ -0,0 +1,463 @@
+package imaging
+
+import (
+ "encoding/binary"
+ "errors"
+ "image"
+ "image/draw"
+ "image/gif"
+ "image/jpeg"
+ "image/png"
+ "io"
+ "io/ioutil"
+ "os"
+ "path/filepath"
+ "strings"
+
+ "golang.org/x/image/bmp"
+ "golang.org/x/image/tiff"
+)
+
+// Format is an image file format.
+type Format int
+
+// Image file formats.
+const (
+ JPEG Format = iota
+ PNG
+ GIF
+ TIFF
+ BMP
+)
+
+func (f Format) String() string {
+ switch f {
+ case JPEG:
+ return "JPEG"
+ case PNG:
+ return "PNG"
+ case GIF:
+ return "GIF"
+ case TIFF:
+ return "TIFF"
+ case BMP:
+ return "BMP"
+ default:
+ return "Unsupported"
+ }
+}
+
+var formatFromExt = map[string]Format{
+ "jpg": JPEG,
+ "jpeg": JPEG,
+ "png": PNG,
+ "tif": TIFF,
+ "tiff": TIFF,
+ "bmp": BMP,
+ "gif": GIF,
+}
+
+// FormatFromExtension parses image format from extension:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+func FormatFromExtension(ext string) (Format, error) {
+ if f, ok := formatFromExt[strings.ToLower(strings.TrimPrefix(ext, "."))]; ok {
+ return f, nil
+ }
+ return -1, ErrUnsupportedFormat
+}
+
+// FormatFromFilename parses image format from filename extension:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+func FormatFromFilename(filename string) (Format, error) {
+ ext := filepath.Ext(filename)
+ return FormatFromExtension(ext)
+}
+
+var (
+ // ErrUnsupportedFormat means the given image format (or file extension) is unsupported.
+ ErrUnsupportedFormat = errors.New("imaging: unsupported image format")
+)
+
+type fileSystem interface {
+ Create(string) (io.WriteCloser, error)
+ Open(string) (io.ReadCloser, error)
+}
+
+type localFS struct{}
+
+func (localFS) Create(name string) (io.WriteCloser, error) { return os.Create(name) }
+func (localFS) Open(name string) (io.ReadCloser, error) { return os.Open(name) }
+
+var fs fileSystem = localFS{}
+
+type decodeConfig struct {
+ autoOrientation bool
+}
+
+var defaultDecodeConfig = decodeConfig{
+ autoOrientation: false,
+}
+
+// DecodeOption sets an optional parameter for the Decode and Open functions.
+type DecodeOption func(*decodeConfig)
+
+// AutoOrientation returns a DecodeOption that sets the auto-orientation mode.
+// If auto-orientation is enabled, the image will be transformed after decoding
+// according to the EXIF orientation tag (if present). By default it's disabled.
+func AutoOrientation(enabled bool) DecodeOption {
+ return func(c *decodeConfig) {
+ c.autoOrientation = enabled
+ }
+}
+
+// Decode reads an image from r.
+func Decode(r io.Reader, opts ...DecodeOption) (image.Image, error) {
+ cfg := defaultDecodeConfig
+ for _, option := range opts {
+ option(&cfg)
+ }
+
+ if !cfg.autoOrientation {
+ img, _, err := image.Decode(r)
+ return img, err
+ }
+
+ var orient orientation
+ pr, pw := io.Pipe()
+ r = io.TeeReader(r, pw)
+ done := make(chan struct{})
+ go func() {
+ defer close(done)
+ orient = readOrientation(pr)
+ io.Copy(ioutil.Discard, pr)
+ }()
+
+ img, _, err := image.Decode(r)
+ pw.Close()
+ <-done
+ if err != nil {
+ return nil, err
+ }
+
+ return fixOrientation(img, orient), nil
+}
+
+// Open loads an image from file.
+//
+// Examples:
+//
+// // Load an image from file.
+// img, err := imaging.Open("test.jpg")
+//
+// // Load an image and transform it depending on the EXIF orientation tag (if present).
+// img, err := imaging.Open("test.jpg", imaging.AutoOrientation(true))
+//
+func Open(filename string, opts ...DecodeOption) (image.Image, error) {
+ file, err := fs.Open(filename)
+ if err != nil {
+ return nil, err
+ }
+ defer file.Close()
+ return Decode(file, opts...)
+}
+
+type encodeConfig struct {
+ jpegQuality int
+ gifNumColors int
+ gifQuantizer draw.Quantizer
+ gifDrawer draw.Drawer
+ pngCompressionLevel png.CompressionLevel
+}
+
+var defaultEncodeConfig = encodeConfig{
+ jpegQuality: 95,
+ gifNumColors: 256,
+ gifQuantizer: nil,
+ gifDrawer: nil,
+ pngCompressionLevel: png.DefaultCompression,
+}
+
+// EncodeOption sets an optional parameter for the Encode and Save functions.
+type EncodeOption func(*encodeConfig)
+
+// JPEGQuality returns an EncodeOption that sets the output JPEG quality.
+// Quality ranges from 1 to 100 inclusive, higher is better. Default is 95.
+func JPEGQuality(quality int) EncodeOption {
+ return func(c *encodeConfig) {
+ c.jpegQuality = quality
+ }
+}
+
+// GIFNumColors returns an EncodeOption that sets the maximum number of colors
+// used in the GIF-encoded image. It ranges from 1 to 256. Default is 256.
+func GIFNumColors(numColors int) EncodeOption {
+ return func(c *encodeConfig) {
+ c.gifNumColors = numColors
+ }
+}
+
+// GIFQuantizer returns an EncodeOption that sets the quantizer that is used to produce
+// a palette of the GIF-encoded image.
+func GIFQuantizer(quantizer draw.Quantizer) EncodeOption {
+ return func(c *encodeConfig) {
+ c.gifQuantizer = quantizer
+ }
+}
+
+// GIFDrawer returns an EncodeOption that sets the drawer that is used to convert
+// the source image to the desired palette of the GIF-encoded image.
+func GIFDrawer(drawer draw.Drawer) EncodeOption {
+ return func(c *encodeConfig) {
+ c.gifDrawer = drawer
+ }
+}
+
+// PNGCompressionLevel returns an EncodeOption that sets the compression level
+// of the PNG-encoded image. Default is png.DefaultCompression.
+func PNGCompressionLevel(level png.CompressionLevel) EncodeOption {
+ return func(c *encodeConfig) {
+ c.pngCompressionLevel = level
+ }
+}
+
+// Encode writes the image img to w in the specified format (JPEG, PNG, GIF, TIFF or BMP).
+func Encode(w io.Writer, img image.Image, format Format, opts ...EncodeOption) error {
+ cfg := defaultEncodeConfig
+ for _, option := range opts {
+ option(&cfg)
+ }
+
+ var err error
+ switch format {
+ case JPEG:
+ var rgba *image.RGBA
+ if nrgba, ok := img.(*image.NRGBA); ok {
+ if nrgba.Opaque() {
+ rgba = &image.RGBA{
+ Pix: nrgba.Pix,
+ Stride: nrgba.Stride,
+ Rect: nrgba.Rect,
+ }
+ }
+ }
+ if rgba != nil {
+ err = jpeg.Encode(w, rgba, &jpeg.Options{Quality: cfg.jpegQuality})
+ } else {
+ err = jpeg.Encode(w, img, &jpeg.Options{Quality: cfg.jpegQuality})
+ }
+
+ case PNG:
+ enc := png.Encoder{CompressionLevel: cfg.pngCompressionLevel}
+ err = enc.Encode(w, img)
+
+ case GIF:
+ err = gif.Encode(w, img, &gif.Options{
+ NumColors: cfg.gifNumColors,
+ Quantizer: cfg.gifQuantizer,
+ Drawer: cfg.gifDrawer,
+ })
+
+ case TIFF:
+ err = tiff.Encode(w, img, &tiff.Options{Compression: tiff.Deflate, Predictor: true})
+
+ case BMP:
+ err = bmp.Encode(w, img)
+
+ default:
+ err = ErrUnsupportedFormat
+ }
+ return err
+}
+
+// Save saves the image to file with the specified filename.
+// The format is determined from the filename extension:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+//
+// Examples:
+//
+// // Save the image as PNG.
+// err := imaging.Save(img, "out.png")
+//
+// // Save the image as JPEG with optional quality parameter set to 80.
+// err := imaging.Save(img, "out.jpg", imaging.JPEGQuality(80))
+//
+func Save(img image.Image, filename string, opts ...EncodeOption) (err error) {
+ f, err := FormatFromFilename(filename)
+ if err != nil {
+ return err
+ }
+ file, err := fs.Create(filename)
+ if err != nil {
+ return err
+ }
+
+ defer func() {
+ cerr := file.Close()
+ if err == nil {
+ err = cerr
+ }
+ }()
+
+ return Encode(file, img, f, opts...)
+}
+
+// orientation is an EXIF flag that specifies the transformation
+// that should be applied to image to display it correctly.
+type orientation int
+
+const (
+ orientationUnspecified = 0
+ orientationNormal = 1
+ orientationFlipH = 2
+ orientationRotate180 = 3
+ orientationFlipV = 4
+ orientationTranspose = 5
+ orientationRotate270 = 6
+ orientationTransverse = 7
+ orientationRotate90 = 8
+)
+
+// readOrientation tries to read the orientation EXIF flag from image data in r.
+// If the EXIF data block is not found or the orientation flag is not found
+// or any other error occures while reading the data, it returns the
+// orientationUnspecified (0) value.
+func readOrientation(r io.Reader) orientation {
+ const (
+ markerSOI = 0xffd8
+ markerAPP1 = 0xffe1
+ exifHeader = 0x45786966
+ byteOrderBE = 0x4d4d
+ byteOrderLE = 0x4949
+ orientationTag = 0x0112
+ )
+
+ // Check if JPEG SOI marker is present.
+ var soi uint16
+ if err := binary.Read(r, binary.BigEndian, &soi); err != nil {
+ return orientationUnspecified
+ }
+ if soi != markerSOI {
+ return orientationUnspecified // Missing JPEG SOI marker.
+ }
+
+ // Find JPEG APP1 marker.
+ for {
+ var marker, size uint16
+ if err := binary.Read(r, binary.BigEndian, &marker); err != nil {
+ return orientationUnspecified
+ }
+ if err := binary.Read(r, binary.BigEndian, &size); err != nil {
+ return orientationUnspecified
+ }
+ if marker>>8 != 0xff {
+ return orientationUnspecified // Invalid JPEG marker.
+ }
+ if marker == markerAPP1 {
+ break
+ }
+ if size < 2 {
+ return orientationUnspecified // Invalid block size.
+ }
+ if _, err := io.CopyN(ioutil.Discard, r, int64(size-2)); err != nil {
+ return orientationUnspecified
+ }
+ }
+
+ // Check if EXIF header is present.
+ var header uint32
+ if err := binary.Read(r, binary.BigEndian, &header); err != nil {
+ return orientationUnspecified
+ }
+ if header != exifHeader {
+ return orientationUnspecified
+ }
+ if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil {
+ return orientationUnspecified
+ }
+
+ // Read byte order information.
+ var (
+ byteOrderTag uint16
+ byteOrder binary.ByteOrder
+ )
+ if err := binary.Read(r, binary.BigEndian, &byteOrderTag); err != nil {
+ return orientationUnspecified
+ }
+ switch byteOrderTag {
+ case byteOrderBE:
+ byteOrder = binary.BigEndian
+ case byteOrderLE:
+ byteOrder = binary.LittleEndian
+ default:
+ return orientationUnspecified // Invalid byte order flag.
+ }
+ if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil {
+ return orientationUnspecified
+ }
+
+ // Skip the EXIF offset.
+ var offset uint32
+ if err := binary.Read(r, byteOrder, &offset); err != nil {
+ return orientationUnspecified
+ }
+ if offset < 8 {
+ return orientationUnspecified // Invalid offset value.
+ }
+ if _, err := io.CopyN(ioutil.Discard, r, int64(offset-8)); err != nil {
+ return orientationUnspecified
+ }
+
+ // Read the number of tags.
+ var numTags uint16
+ if err := binary.Read(r, byteOrder, &numTags); err != nil {
+ return orientationUnspecified
+ }
+
+ // Find the orientation tag.
+ for i := 0; i < int(numTags); i++ {
+ var tag uint16
+ if err := binary.Read(r, byteOrder, &tag); err != nil {
+ return orientationUnspecified
+ }
+ if tag != orientationTag {
+ if _, err := io.CopyN(ioutil.Discard, r, 10); err != nil {
+ return orientationUnspecified
+ }
+ continue
+ }
+ if _, err := io.CopyN(ioutil.Discard, r, 6); err != nil {
+ return orientationUnspecified
+ }
+ var val uint16
+ if err := binary.Read(r, byteOrder, &val); err != nil {
+ return orientationUnspecified
+ }
+ if val < 1 || val > 8 {
+ return orientationUnspecified // Invalid tag value.
+ }
+ return orientation(val)
+ }
+ return orientationUnspecified // Missing orientation tag.
+}
+
+// fixOrientation applies a transform to img corresponding to the given orientation flag.
+func fixOrientation(img image.Image, o orientation) image.Image {
+ switch o {
+ case orientationNormal:
+ case orientationFlipH:
+ img = FlipH(img)
+ case orientationFlipV:
+ img = FlipV(img)
+ case orientationRotate90:
+ img = Rotate90(img)
+ case orientationRotate180:
+ img = Rotate180(img)
+ case orientationRotate270:
+ img = Rotate270(img)
+ case orientationTranspose:
+ img = Transpose(img)
+ case orientationTransverse:
+ img = Transverse(img)
+ }
+ return img
+}
diff --git a/vendor/github.com/disintegration/imaging/tools.go b/vendor/github.com/disintegration/imaging/tools.go
index fae1fa1..7887946 100644
--- a/vendor/github.com/disintegration/imaging/tools.go
+++ b/vendor/github.com/disintegration/imaging/tools.go
@@ -1,10 +1,44 @@
package imaging
import (
+ "bytes"
"image"
+ "image/color"
"math"
)
+// New creates a new image with the specified width and height, and fills it with the specified color.
+func New(width, height int, fillColor color.Color) *image.NRGBA {
+ if width <= 0 || height <= 0 {
+ return &image.NRGBA{}
+ }
+
+ c := color.NRGBAModel.Convert(fillColor).(color.NRGBA)
+ if (c == color.NRGBA{0, 0, 0, 0}) {
+ return image.NewNRGBA(image.Rect(0, 0, width, height))
+ }
+
+ return &image.NRGBA{
+ Pix: bytes.Repeat([]byte{c.R, c.G, c.B, c.A}, width*height),
+ Stride: 4 * width,
+ Rect: image.Rect(0, 0, width, height),
+ }
+}
+
+// Clone returns a copy of the given image.
+func Clone(img image.Image) *image.NRGBA {
+ src := newScanner(img)
+ dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+ size := src.w * 4
+ parallel(0, src.h, func(ys <-chan int) {
+ for y := range ys {
+ i := y * dst.Stride
+ src.scan(0, y, src.w, y+1, dst.Pix[i:i+size])
+ }
+ })
+ return dst
+}
+
// Anchor is the anchor point for image alignment.
type Anchor int
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 01:57:55 +0000