Add default login if no htpasswd provided

.drone-manifest-local.yml

@@ -1,22 +0,0 @@
-image: registry.nemunai.re/youp0m:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
-{{#if build.tags}}
-tags:
-{{#each build.tags}}
-  - {{this}}
-{{/each}}
-{{/if}}
-manifests:
-  - image: registry.nemunai.re/youp0m:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
-    platform:
-      architecture: amd64
-      os: linux
-  - image: registry.nemunai.re/youp0m:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
-    platform:
-      architecture: arm64
-      os: linux
-      variant: v8
-  - image: registry.nemunai.re/youp0m:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm
-    platform:
-      architecture: arm
-      os: linux
-      variant: v7

.drone-manifest.yml

@@ -1,22 +0,0 @@
-image: nemunaire/youp0m:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
-{{#if build.tags}}
-tags:
-{{#each build.tags}}
-  - {{this}}
-{{/each}}
-{{/if}}
-manifests:
-  - image: nemunaire/youp0m:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
-    platform:
-      architecture: amd64
-      os: linux
-  - image: nemunaire/youp0m:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
-    platform:
-      architecture: arm64
-      os: linux
-      variant: v8
-  - image: nemunaire/youp0m:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm
-    platform:
-      architecture: arm
-      os: linux
-      variant: v7

.drone.yml

@@ -1,130 +0,0 @@
----
-kind: pipeline
-type: docker
-name: build-arm64
-
-platform:
-  os: linux
-  arch: arm64
-
-steps:
-  - name: build
-    image: golang:alpine
-    commands:
-      - apk --no-cache add git go-bindata
-      - go generate -v
-      - go get -v -d
-      - go build -v -ldflags="-s -w" -o youp0m
-      - wget -O Dockerfile https://ankh.serekh.nemunai.re/local/Dockerfile-youp0m
-      - wget -O entrypoint.sh https://ankh.serekh.nemunai.re/local/entrypoint.sh-youp0m && chmod +x entrypoint.sh
-
-  - name: publish
-    image: plugins/docker
-    settings:
-      repo: nemunaire/youp0m
-      auto_tag: true
-      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
-      experimental: true
-      squash: true
-      username:
-        from_secret: docker_username
-      password:
-        from_secret: docker_password
-
-  - name: publish on nemunai.re
-    image: plugins/docker
-    settings:
-      registry: registry.nemunai.re
-      repo: registry.nemunai.re/youp0m
-      auto_tag: true
-      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
-      experimental: true
-      squash: true
-      username:
-        from_secret: docker_nemunai.re_username
-      password:
-        from_secret: docker_nemunai.re_password
-
----
-kind: pipeline
-type: docker
-name: build-amd64
-
-platform:
-  os: linux
-  arch: amd64
-
-steps:
-  - name: build
-    image: golang:alpine
-    commands:
-      - apk --no-cache add git go-bindata
-      - go generate -v
-      - go get -v -d
-      - go build -v -ldflags="-s -w" -o youp0m
-      - wget -O Dockerfile https://ankh.serekh.nemunai.re/local/Dockerfile-youp0m
-      - wget -O entrypoint.sh https://ankh.serekh.nemunai.re/local/entrypoint.sh-youp0m && chmod +x entrypoint.sh
-
-  - name: publish
-    image: plugins/docker
-    settings:
-      repo: nemunaire/youp0m
-      auto_tag: true
-      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
-      experimental: true
-      squash: true
-      username:
-        from_secret: docker_username
-      password:
-        from_secret: docker_password
-
-  - name: publish on nemunai.re
-    image: plugins/docker
-    settings:
-      registry: registry.nemunai.re
-      repo: registry.nemunai.re/youp0m
-      auto_tag: true
-      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
-      experimental: true
-      squash: true
-      username:
-        from_secret: docker_nemunai.re_username
-      password:
-        from_secret: docker_nemunai.re_password
-
----
-kind: pipeline
-name: docker-manifest
-
-steps:
-- name: publish
-  image: plugins/manifest
-  settings:
-    auto_tag: true
-    ignore_missing: true
-    spec: .drone-manifest.yml
-    username:
-      from_secret: docker_username
-    password:
-      from_secret: docker_password
-
-- name: publish on nemunai.re
-  image: plugins/manifest
-  settings:
-    auto_tag: true
-    ignore_missing: true
-    spec: .drone-manifest-local.yml
-    username:
-      from_secret: docker_nemunai.re_username
-    password:
-      from_secret: docker_nemunai.re_password
-
-trigger:
-  event:
-  - cron
-  - push
-  - tag
-
-depends_on:
-- build-arm64
-- build-amd64

.gitignore

@@ -1,2 +0,0 @@
-youp0m
-vendor

api.go

@@ -12,31 +12,21 @@ import (
 
 type DispatchFunction func(*User, []string, io.ReadCloser) (interface{}, error)
 
+var apiRoutes = map[string]*(map[string]struct{AuthFunction;DispatchFunction}){
+	"images":  &ApiImagesRouting,
+	"next":    &ApiNextImagesRouting,
+	"version": &ApiVersionRouting,
+}
+
 type apiHandler struct {
-	PE           *PictureExplorer
+	Authenticate func(*http.Request) (*User)
-	Authenticate func(*http.Request) *User
-	routes       map[string](map[string]struct {
-		AuthFunction
-		DispatchFunction
-	})
 }
 
-func NewAPIHandler(pe *PictureExplorer, authenticate func(*http.Request) *User) *apiHandler {
+func ApiHandler(Authenticate func(*http.Request) (*User)) (apiHandler) {
-	return &apiHandler{
+	return apiHandler{Authenticate}
-		pe,
-		authenticate,
-		map[string](map[string]struct {
-			AuthFunction
-			DispatchFunction
-		}){
-			"images":  ApiImagesRouting(pe),
-			"next":    ApiNextImagesRouting(pe),
-			"version": ApiVersionRouting,
-		},
-	}
 }
 
-func (a *apiHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+func (a apiHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	user := a.Authenticate(r)
 
 	log.Printf("Handling %s API request from %s: %s %s [%s]\n", r.Method, r.RemoteAddr, r.URL.Path, user, r.UserAgent())
@@ -62,8 +52,8 @@ func (a *apiHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	// Route request
 	if len(sURL) == 0 {
 		err = errors.New(fmt.Sprintf("No action provided"))
-	} else if h, ok := a.routes[sURL[0]]; ok {
+	} else if h, ok := apiRoutes[sURL[0]]; ok {
-		if f, ok := h[r.Method]; ok {
+		if f, ok := (*h)[r.Method]; ok {
 			if f.AuthFunction(user, sURL[1:]) {
 				ret, err = f.DispatchFunction(user, sURL[1:], r.Body)
 			} else {

api_images.go

@@ -5,88 +5,72 @@ import (
 	"io"
 )
 
-func ApiImagesRouting(pe *PictureExplorer) map[string]struct {
+var ApiImagesRouting = map[string]struct{AuthFunction; DispatchFunction}{
-	AuthFunction
+	"GET":    {PublicPage, listImages},
-	DispatchFunction
+	"POST":   {PublicPage, addImage},
-} {
+	"DELETE": {PrivatePage, hideImage},
-	return map[string]struct {
-		AuthFunction
-		DispatchFunction
-	}{
-		"GET":    {PublicPage, pe.listImages},
-		"POST":   {PublicPage, pe.addImage},
-		"DELETE": {PrivatePage, pe.hideImage},
-	}
 }
 
-func ApiNextImagesRouting(pe *PictureExplorer) map[string]struct {
+var ApiNextImagesRouting = map[string]struct{AuthFunction; DispatchFunction}{
-	AuthFunction
+	"GET":    {PrivatePage, listNextImages},
-	DispatchFunction
+	"POST":   {PublicPage, addImage},
-} {
+	"DELETE": {PrivatePage, deleteImage},
-	return map[string]struct {
-		AuthFunction
-		DispatchFunction
-	}{
-		"GET":    {PrivatePage, pe.listNextImages},
-		"POST":   {PublicPage, pe.addImage},
-		"DELETE": {PrivatePage, pe.deleteImage},
-	}
 }
 
-func (pe *PictureExplorer) listImages(u *User, args []string, body io.ReadCloser) (interface{}, error) {
+func listImages(u *User, args []string, body io.ReadCloser) (interface{}, error) {
 	if len(args) < 1 {
-		return pe.GetPublishedImages()
+		return GetPublishedImages()
 	} else if args[0] == "last" {
-		return pe.GetLastImage()
+		return GetLastImage()
 	} else {
-		return pe.GetPublishedImage(args[0])
+		return GetPublishedImage(args[0])
 	}
 }
 
-func (pe *PictureExplorer) listNextImages(u *User, args []string, body io.ReadCloser) (interface{}, error) {
+func listNextImages(u *User, args []string, body io.ReadCloser) (interface{}, error) {
 	if len(args) < 1 {
-		return pe.GetNextImages()
+		return GetNextImages()
 	} else if len(args) >= 2 && args[1] == "publish" {
-		if pict, err := pe.GetNextImage(args[0]); err != nil {
+		if pict, err := GetNextImage(args[0]); err != nil {
 			return nil, err
-		} else if err := pe.Publish(pict); err != nil {
+		} else if err := pict.Publish(); err != nil {
 			return nil, err
 		} else {
 			return true, nil
 		}
 	} else {
-		return pe.GetNextImage(args[0])
+		return GetNextImage(args[0])
 	}
 }
 
-func (pe *PictureExplorer) addImage(u *User, args []string, body io.ReadCloser) (interface{}, error) {
+func addImage(u *User, args []string, body io.ReadCloser) (interface{}, error) {
 	if len(args) < 1 {
 		return nil, errors.New("Need an image identifier to create")
-	} else if err := pe.AddImage(args[0], body); err != nil {
+	} else if err := AddImage(args[0], body); err != nil {
 		return nil, err
 	} else {
 		return true, nil
 	}
 }
 
-func (pe *PictureExplorer) hideImage(u *User, args []string, body io.ReadCloser) (interface{}, error) {
+func hideImage(u *User, args []string, body io.ReadCloser) (interface{}, error) {
 	if len(args) < 1 {
 		return nil, errors.New("Need an image identifier to delete")
-	} else if pict, err := pe.GetPublishedImage(args[0]); err != nil {
+	} else if pict, err := GetPublishedImage(args[0]); err != nil {
 		return nil, errors.New("No matching image")
-	} else if err := pe.Unpublish(pict); err != nil {
+	} else if err := pict.Unpublish(); err != nil {
 		return nil, err
 	} else {
 		return true, nil
 	}
 }
 
-func (pe *PictureExplorer) deleteImage(u *User, args []string, body io.ReadCloser) (interface{}, error) {
+func deleteImage(u *User, args []string, body io.ReadCloser) (interface{}, error) {
 	if len(args) < 1 {
 		return nil, errors.New("Need an image identifier to delete")
-	} else if pict, err := pe.GetNextImage(args[0]); err != nil {
+	} else if pict, err := GetNextImage(args[0]); err != nil {
 		return nil, errors.New("No matching image")
-	} else if err := pe.Remove(pict); err != nil {
+	} else if err := pict.Remove(); err != nil {
 		return nil, err
 	} else {
 		return true, nil

assets-dev.go

@@ -1,32 +0,0 @@
-//go:build dev
-// +build dev
-
-package main
-
-import (
-	"flag"
-	"net/http"
-	"os"
-	"path/filepath"
-)
-
-var (
-	Assets    http.FileSystem
-	StaticDir string = "static/"
-)
-
-func init() {
-	flag.StringVar(&StaticDir, "static", StaticDir, "Directory containing static files")
-}
-
-func sanitizeStaticOptions() error {
-	StaticDir, _ = filepath.Abs(StaticDir)
-	if _, err := os.Stat(StaticDir); os.IsNotExist(err) {
-		StaticDir, _ = filepath.Abs(filepath.Join(filepath.Dir(os.Args[0]), "static"))
-		if _, err := os.Stat(StaticDir); os.IsNotExist(err) {
-			return err
-		}
-	}
-	Assets = http.Dir(StaticDir)
-	return nil
-}

assets.go

@@ -1,28 +0,0 @@
-//go:build !dev
-// +build !dev
-
-package main
-
-import (
-	"embed"
-	"io/fs"
-	"log"
-	"net/http"
-)
-
-//go:embed static/* static/js/* static/css/*
-var _assets embed.FS
-
-var Assets http.FileSystem
-
-func init() {
-	sub, err := fs.Sub(_assets, "static")
-	if err != nil {
-		log.Fatal("Unable to cd to static/ directory:", err)
-	}
-	Assets = http.FS(sub)
-}
-
-func sanitizeStaticOptions() error {
-	return nil
-}

auth.go

@@ -6,7 +6,7 @@ import (
 	"os"
 	"strings"
 
-	"gitlab.com/nyarla/go-crypt"
+	"github.com/nyarla/go-crypt"
 )
 
 type User struct {
@@ -52,9 +52,10 @@ func (h Htpasswd) Authenticate(username, password string) *User {
 	}
 }
 
+
 /// Request authentication
 
-func Authenticate(htpasswd Htpasswd, r *http.Request) *User {
+func Authenticate(htpasswd Htpasswd, r *http.Request) (*User) {
 	// Authenticate the user if any
 	if username, password, ok := r.BasicAuth(); ok {
 		return htpasswd.Authenticate(username, password)
@@ -63,6 +64,7 @@ func Authenticate(htpasswd Htpasswd, r *http.Request) *User {
 	}
 }
 
+
 /// Page rules
 
 type AuthFunction func(*User, []string) bool

backend.go

@@ -1,44 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"image"
-	"io"
-	"net/http"
-	"strings"
-)
-
-var existing_backends []string
-
-type BackendSelector string
-
-func (s *BackendSelector) String() string {
-	return string(*s)
-}
-
-func (s *BackendSelector) Set(v string) error {
-	found := false
-	for _, b := range existing_backends {
-		if strings.ToLower(v) == b {
-			found = true
-			tmp := BackendSelector(v)
-			s = &tmp
-			break
-		}
-	}
-
-	if !found {
-		return fmt.Errorf("%q is not a known file backend (existing backends: %v)", v, existing_backends)
-	}
-	return nil
-}
-
-type FileBackend interface {
-	DeletePicture(string, string) error
-	ServeFile() http.Handler
-	GetPicture(string, string, io.Writer) error
-	GetPictureInfo(string, string) (*Picture, error)
-	ListPictures(string) ([]*Picture, error)
-	MovePicture(string, string, string) error
-	PutPicture(string, string, *image.Image) error
-}

backend_local.go

@@ -1,106 +0,0 @@
-package main
-
-import (
-	"image"
-	"image/jpeg"
-	"io"
-	"io/ioutil"
-	"net/http"
-	"os"
-	"path"
-	"time"
-)
-
-func init() {
-	existing_backends = append(existing_backends, "local")
-}
-
-type LocalFileBackend struct {
-	BaseDir string
-}
-
-func (l *LocalFileBackend) getPath(box, name string) string {
-	return path.Join(l.BaseDir, box, name+".jpg")
-}
-
-func (l *LocalFileBackend) DeletePicture(box, name string) error {
-	return os.Remove(l.getPath(box, name))
-}
-
-func (l *LocalFileBackend) ServeFile() http.Handler {
-	return http.FileServer(http.Dir(l.BaseDir))
-}
-
-func (l *LocalFileBackend) createPictureInfo(local_path, name string, file os.FileInfo) *Picture {
-	return &Picture{
-		local_path,                           // Path
-		name,                                 // Basename
-		name[:len(name)-len(path.Ext(name))], // Sanitized filename
-		file.ModTime(),                       // UploadTime
-	}
-}
-
-func (l *LocalFileBackend) GetPicture(box, name string, w io.Writer) error {
-	local_path := l.getPath(box, name)
-
-	fd, err := os.Open(local_path)
-	if err != nil {
-		return err
-	}
-	defer fd.Close()
-
-	_, err = io.Copy(w, fd)
-
-	return err
-}
-
-func (l *LocalFileBackend) GetPictureInfo(box, name string) (*Picture, error) {
-	local_path := l.getPath(box, name)
-
-	file, err := os.Stat(local_path)
-	if err != nil {
-		return nil, err
-	}
-
-	return l.createPictureInfo(path.Join(box, name+".jpg"), name, file), nil
-}
-
-func (l *LocalFileBackend) ListPictures(box string) ([]*Picture, error) {
-	files, err := ioutil.ReadDir(path.Join(l.BaseDir, box))
-	if err != nil {
-		return nil, err
-	}
-
-	pictures := make([]*Picture, 0)
-	for _, file := range files {
-		if !file.IsDir() {
-			pictures = append(pictures, l.createPictureInfo(path.Join(box, file.Name()), file.Name(), file))
-		}
-	}
-
-	return pictures, nil
-}
-
-func (l *LocalFileBackend) MovePicture(box_from, box_to, name string) error {
-	newpath := l.getPath(box_to, name)
-
-	err := os.Rename(
-		l.getPath(box_from, name),
-		newpath,
-	)
-	if err != nil {
-		return err
-	}
-
-	return os.Chtimes(newpath, time.Now(), time.Now())
-}
-
-func (l *LocalFileBackend) PutPicture(box, name string, img *image.Image) error {
-	fd, err := os.OpenFile(l.getPath(box, name), os.O_RDWR|os.O_CREATE, 0644)
-	if err != nil {
-		return err
-	}
-	defer fd.Close()
-
-	return jpeg.Encode(fd, *img, nil)
-}

backend_s3.go

@@ -1,272 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"flag"
-	"fmt"
-	"image"
-	"image/jpeg"
-	"io"
-	"log"
-	"net/http"
-	"os"
-	"path"
-
-	"github.com/aws/aws-sdk-go/aws"
-	"github.com/aws/aws-sdk-go/aws/credentials"
-	"github.com/aws/aws-sdk-go/aws/session"
-	"github.com/aws/aws-sdk-go/service/s3"
-	"github.com/aws/aws-sdk-go/service/s3/s3manager"
-)
-
-var (
-	s3_endpoint   string
-	s3_region     = "us"
-	s3_bucket     string
-	s3_access_key string
-	s3_secret_key string
-	s3_path_style bool
-)
-
-func init() {
-	existing_backends = append(existing_backends, "s3")
-
-	if endpoint, ok := os.LookupEnv("S3_ENDPOINT"); ok {
-		backend = "s3"
-		s3_endpoint = endpoint
-	}
-	if region, ok := os.LookupEnv("S3_REGION"); ok {
-		backend = "s3"
-		s3_region = region
-	}
-	s3_bucket, _ = os.LookupEnv("S3_BUCKET")
-	s3_access_key, _ = os.LookupEnv("S3_ACCESS_KEY")
-	s3_secret_key, _ = os.LookupEnv("S3_SECRET_KEY")
-	if path_style, ok := os.LookupEnv("S3_PATH_STYLE"); ok {
-		s3_path_style = path_style == "1" || path_style == "ON" || path_style == "on" || path_style == "TRUE" || path_style == "true" || path_style == "yes" || path_style == "YES"
-	}
-
-	flag.StringVar(&s3_endpoint, "s3-endpoint", s3_endpoint, "When using S3 backend, endpoint to use")
-	flag.StringVar(&s3_region, "s3-region", s3_region, "When using S3 backend, region to use")
-	flag.StringVar(&s3_bucket, "s3-bucket", s3_bucket, "When using S3 backend, bucket to use")
-	flag.StringVar(&s3_access_key, "s3-access-key", s3_access_key, "When using S3 backend, Access Key")
-	flag.StringVar(&s3_secret_key, "s3-secret-key", s3_secret_key, "When using S3 backend, Secret Key")
-	flag.BoolVar(&s3_path_style, "s3-path-style", s3_path_style, "When using S3 backend, force path style (when using minio)")
-}
-
-type S3FileBackend struct {
-	Endpoint  string
-	Region    string
-	Bucket    string
-	AccessKey string
-	SecretKey string
-	PathStyle bool
-	BaseDir   string
-}
-
-func (l *S3FileBackend) getPath(box, name string) string {
-	if l.BaseDir == "" {
-		return path.Join(box, name+".jpg")
-	} else {
-		return path.Join(l.BaseDir, box, name+".jpg")
-	}
-}
-
-func (l *S3FileBackend) newSession() (*session.Session, error) {
-	return session.NewSession(&aws.Config{
-		Credentials:      credentials.NewStaticCredentials(l.AccessKey, l.SecretKey, ""),
-		Endpoint:         &l.Endpoint,
-		Region:           &l.Region,
-		S3ForcePathStyle: &l.PathStyle,
-	})
-}
-
-func (l *S3FileBackend) DeletePicture(box, name string) error {
-	s, err := l.newSession()
-	if err != nil {
-		return err
-	}
-
-	log.Println(l.getPath(box, name))
-
-	input := &s3.DeleteObjectsInput{
-		Bucket: aws.String(l.Bucket),
-		Delete: &s3.Delete{
-			Objects: []*s3.ObjectIdentifier{
-				{
-					Key: aws.String(l.getPath(box, name)),
-				},
-			},
-		},
-	}
-
-	_, err = s3.New(s).DeleteObjects(input)
-	return err
-}
-
-func (l *S3FileBackend) ServeFile() http.Handler {
-	return l
-}
-
-func (l *S3FileBackend) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	s, err := l.newSession()
-	if err != nil {
-		return
-	}
-
-	result, err := s3.New(s).GetObject(&s3.GetObjectInput{
-		Bucket: aws.String(l.Bucket),
-		Key:    aws.String(r.URL.Path),
-	})
-	if err != nil {
-		return
-	}
-
-	io.Copy(w, result.Body)
-}
-
-func (l *S3FileBackend) createPictureInfo(local_path, name string, file *s3.Object) *Picture {
-	return &Picture{
-		local_path,                           // Path
-		name,                                 // Basename
-		name[:len(name)-len(path.Ext(name))], // Sanitized filename
-		*file.LastModified,                   // UploadTime
-	}
-}
-
-func (l *S3FileBackend) GetPicture(box, name string, w io.Writer) error {
-	s, err := l.newSession()
-	if err != nil {
-		return err
-	}
-
-	s3_path := l.getPath(box, name)
-
-	input := &s3.GetObjectInput{
-		Bucket: aws.String(l.Bucket),
-		Key:    aws.String(s3_path),
-	}
-
-	result, err := s3.New(s).GetObject(input)
-	if err != nil {
-		return err
-	}
-
-	_, err = io.Copy(w, result.Body)
-
-	return err
-}
-
-func (l *S3FileBackend) GetPictureInfo(box, name string) (*Picture, error) {
-	s, err := l.newSession()
-	if err != nil {
-		return nil, err
-	}
-
-	input := &s3.ListObjectsInput{
-		Bucket: aws.String(l.Bucket),
-		Prefix: aws.String(l.getPath(box, name)),
-	}
-
-	result, err := s3.New(s).ListObjects(input)
-	if err != nil {
-		return nil, err
-	}
-
-	var pictures []*Picture
-	for _, file := range result.Contents {
-		pictures = append(pictures, l.createPictureInfo(*file.Key, path.Base(*file.Key), file))
-		break
-	}
-
-	if len(pictures) == 0 {
-		return nil, fmt.Errorf("Object not found")
-	}
-
-	return pictures[0], nil
-}
-
-func (l *S3FileBackend) ListPictures(box string) ([]*Picture, error) {
-	s, err := l.newSession()
-	if err != nil {
-		return nil, err
-	}
-
-	input := &s3.ListObjectsInput{
-		Bucket: aws.String(l.Bucket),
-	}
-
-	if l.BaseDir == "" {
-		input.Prefix = aws.String(box)
-	} else {
-		input.Prefix = aws.String(path.Join(l.BaseDir, box))
-	}
-
-	result, err := s3.New(s).ListObjects(input)
-	if err != nil {
-		return nil, err
-	}
-
-	pictures := make([]*Picture, 0)
-	for _, file := range result.Contents {
-		pictures = append(pictures, l.createPictureInfo(path.Join(box, *file.Key), path.Base(*file.Key), file))
-	}
-
-	return pictures, nil
-}
-
-func (l *S3FileBackend) MovePicture(box_from, box_to, name string) error {
-	s, err := l.newSession()
-	if err != nil {
-		return err
-	}
-
-	log.Println(l.getPath(box_from, name), l.getPath(box_to, name))
-
-	_, err = s3.New(s).CopyObject(&s3.CopyObjectInput{
-		Bucket:     aws.String(l.Bucket),
-		CopySource: aws.String(path.Join("", l.Bucket, l.getPath(box_from, name))),
-		Key:        aws.String(l.getPath(box_to, name)),
-	})
-	if err != nil {
-		return err
-	}
-
-	log.Println(l.getPath(box_from, name))
-
-	input := &s3.DeleteObjectsInput{
-		Bucket: aws.String(l.Bucket),
-		Delete: &s3.Delete{
-			Objects: []*s3.ObjectIdentifier{
-				{
-					Key: aws.String(l.getPath(box_from, name)),
-				},
-			},
-		},
-	}
-
-	_, err = s3.New(s).DeleteObjects(input)
-	return err
-}
-
-func (l *S3FileBackend) PutPicture(box, name string, img *image.Image) error {
-	s, err := l.newSession()
-	if err != nil {
-		return err
-	}
-
-	bbuf := new(bytes.Buffer)
-	err = jpeg.Encode(bbuf, *img, nil)
-	if err != nil {
-		return err
-	}
-
-	_, err = s3manager.NewUploader(s).Upload(&s3manager.UploadInput{
-		Bucket: aws.String(l.Bucket),
-		ACL:    aws.String("public-read"),
-		Key:    aws.String(l.getPath(box, name)),
-		Body:   bbuf,
-	})
-
-	return err
-}

go.mod

@@ -1,9 +0,0 @@
-module git.nemunai.re/youp0m
-
-go 1.16
-
-require (
-	github.com/aws/aws-sdk-go v1.44.136
-	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
-	gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b
-)

go.sum

@@ -1,108 +0,0 @@
-github.com/aws/aws-sdk-go v1.44.91 h1:SRWmuX7PTyhBdLuvSfM7KWrWISJsrRsUPcFDSFduRxY=
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-github.com/aws/aws-sdk-go v1.44.96/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX4oIKwKHZo=
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-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

images.go

@@ -6,14 +6,14 @@ import (
 	"strings"
 )
 
-type imagesHandler struct {
+type imagesHandler struct{
 	name   string
-	auth   func(*http.Request) bool
+	auth   func(*http.Request) (bool)
 	hndlr  http.Handler
-	getter func(fname string) (*Picture, error)
+	getter func(fname string) (Picture, error)
 }
 
-func ImagesHandler(name string, auth func(*http.Request) bool, hndlr http.Handler, getter func(fname string) (*Picture, error)) imagesHandler {
+func ImagesHandler(name string, auth func(*http.Request) (bool), hndlr http.Handler, getter func(fname string) (Picture, error)) (imagesHandler) {
 	return imagesHandler{name, auth, hndlr, getter}
 }
 
@@ -39,7 +39,7 @@ func (i imagesHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// Check rights
-	if !i.auth(r) {
+	if ! i.auth(r) {
 		w.Header().Set("WWW-Authenticate", "Basic realm=\"YouP0m\"")
 		http.Error(w, "You are not allowed to perform this request.", http.StatusUnauthorized)
 		return
@@ -50,7 +50,7 @@ func (i imagesHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, err.Error(), http.StatusNotFound)
 		return
 	} else {
-		r.URL.Path = "/" + pict.path
+		r.URL.Path = "/" + pict.basename
 		i.hndlr.ServeHTTP(w, r)
 	}
 }

main.go

@@ -2,31 +2,27 @@ package main
 
 import (
 	"flag"
-	"fmt"
 	"log"
 	"net/http"
 	"os"
-	"path"
+	"path/filepath"
 )
 
-var mux = http.NewServeMux()
+var PublishedImgDir string
-
+var NextImgDir string
-var (
+var ThumbsDir string
-	ThumbsDir string
-	backend   = "local"
-)
 
 func main() {
 	bind := flag.String("bind", ":8080", "Bind port/socket")
 	htpasswd_file := flag.String("htpasswd", "", "Admin passwords file, Apache htpasswd format")
-	publishedImgDir := flag.String("publishedimgdir", "published/", "Directory where save published pictures")
+	flag.StringVar(&PublishedImgDir, "publishedimgdir", "./images/published/", "Directory where save published pictures")
-	nextImgDir := flag.String("nextimgdir", "next/", "Directory where save pictures to review")
+	flag.StringVar(&NextImgDir, "nextimgdir", "./images/next/", "Directory where save pictures to review")
-	baseDir := flag.String("basedir", "images/", "Local base directory where find published and next dirs")
-	flag.StringVar(&backend, "storage-backend", backend, fmt.Sprintf("Storage backend to use (between: %s)", existing_backends))
 	flag.StringVar(&ThumbsDir, "thumbsdir", "./images/thumbs/", "Directory where generate thumbs")
 	flag.Parse()
 
-	htpasswd := &Htpasswd{}
+	htpasswd := &Htpasswd{
+		entries: map[string]string{"admin": "2fClb0C8dIphk"},
+	}
 
 	if htpasswd_file != nil && *htpasswd_file != "" {
 		log.Println("Reading htpasswd file...")
@@ -34,12 +30,21 @@ func main() {
 		if htpasswd, err = NewHtpasswd(*htpasswd_file); htpasswd == nil {
 			log.Fatal("Unable to parse htpasswd:", err)
 		}
-	} else if *nextImgDir == "next/" {
+	} else {
-		log.Println("Disable admin interface, images will be published without moderation")
+		log.Println("Using default credentials for administrative part: admin:admin")
-		nextImgDir = publishedImgDir
 	}
 
 	log.Println("Checking paths...")
+	if _, err := os.Stat(PublishedImgDir); os.IsNotExist(err) {
+		if err := os.MkdirAll(PublishedImgDir, 0755); err != nil {
+			log.Fatal(err)
+		}
+	}
+	if _, err := os.Stat(NextImgDir); os.IsNotExist(err) {
+		if err := os.MkdirAll(NextImgDir, 0755); err != nil {
+			log.Fatal(err)
+		}
+	}
 	if _, err := os.Stat(ThumbsDir); os.IsNotExist(err) {
 		if err := os.MkdirAll(ThumbsDir, 0755); err != nil {
 			log.Fatal(err)
@@ -47,69 +52,47 @@ func main() {
 	}
 
 	log.Println("Registering handlers...")
-	authFunc := func(r *http.Request) *User { return Authenticate(*htpasswd, r) }
+	authFunc := func (r *http.Request) (*User){ return Authenticate(*htpasswd, r) }
 
-	if err := sanitizeStaticOptions(); err != nil {
+	staticDir, _ := filepath.Abs("static")
-		log.Fatal(err)
+	if _, err := os.Stat(staticDir); os.IsNotExist(err) {
-	}
+		staticDir, _ = filepath.Abs(filepath.Join(filepath.Dir(os.Args[0]), "static"))
-
+		if _, err := os.Stat(staticDir); os.IsNotExist(err) {
-	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+			log.Fatal(err)
-		r.URL.Path = "/"
-		http.FileServer(Assets).ServeHTTP(w, r)
-	})
-
-	var storage_backend FileBackend
-	if backend == "local" {
-		storage_backend = &LocalFileBackend{*baseDir}
-		if _, err := os.Stat(path.Join(*baseDir, *publishedImgDir)); os.IsNotExist(err) {
-			if err := os.MkdirAll(path.Join(*baseDir, *publishedImgDir), 0755); err != nil {
-				log.Fatal(err)
-			}
 		}
-		if _, err := os.Stat(path.Join(*baseDir, *nextImgDir)); os.IsNotExist(err) {
-			if err := os.MkdirAll(path.Join(*baseDir, *nextImgDir), 0755); err != nil {
-				log.Fatal(err)
-			}
-		}
-	} else if backend == "s3" {
-		storage_backend = &S3FileBackend{s3_endpoint, s3_region, s3_bucket, s3_access_key, s3_secret_key, s3_path_style, *baseDir}
-	} else {
-		log.Fatalf("%q is not a valid storage backend.", backend)
-	}
-	log.Printf("Using %s storage backend", backend)
-
-	pe := &PictureExplorer{
-		FileBackend:     storage_backend,
-		PublishedImgDir: *publishedImgDir,
-		NextImgDir:      *nextImgDir,
 	}
 
-	mux.Handle("/api/", http.StripPrefix("/api", NewAPIHandler(pe, authFunc)))
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { http.ServeFile(w, r, filepath.Join(staticDir, "index.html")) })
+	mux.Handle("/css/", http.FileServer(http.Dir(staticDir)))
+	mux.Handle("/js/", http.FileServer(http.Dir(staticDir)))
+
+	mux.Handle("/api/", http.StripPrefix("/api", ApiHandler(authFunc)))
 
 	mux.Handle("/images/", http.StripPrefix("/images", ImagesHandler(
 		"images",
-		func(*http.Request) bool { return true },
+		func (*http.Request) (bool){ return true; },
-		pe.ServeFile(),
+		http.FileServer(http.Dir(PublishedImgDir)),
-		pe.GetPublishedImage,
+		GetPublishedImage,
 	)))
 	mux.Handle("/images/next/", http.StripPrefix("/images/next", ImagesHandler(
 		"next",
-		func(r *http.Request) bool { return authFunc(r) != nil },
+		func (r *http.Request) (bool){ return authFunc(r) != nil; },
-		pe.ServeFile(),
+		http.FileServer(http.Dir(NextImgDir)),
-		pe.GetNextImage,
+		GetNextImage,
 	)))
 
 	mux.Handle("/images/thumbs/", http.StripPrefix("/images/thumbs", ImagesHandler(
 		"thumbs",
-		func(*http.Request) bool { return true },
+		func (*http.Request) (bool){ return true; },
 		http.FileServer(http.Dir(ThumbsDir)),
-		pe.GetPublishedImage,
+		GetPublishedImage,
 	)))
 	mux.Handle("/images/next/thumbs/", http.StripPrefix("/images/next/thumbs", ImagesHandler(
 		"nexthumbs",
-		func(r *http.Request) bool { return authFunc(r) != nil },
+		func (r *http.Request) (bool){ return authFunc(r) != nil; },
 		http.FileServer(http.Dir(ThumbsDir)),
-		pe.GetNextImage,
+		GetNextImage,
 	)))
 
 	mux.HandleFunc("/admin/", func(w http.ResponseWriter, r *http.Request) {
@@ -117,8 +100,7 @@ func main() {
 			w.Header().Set("WWW-Authenticate", "Basic realm=\"YouP0m\"")
 			http.Error(w, "You are not allowed to perform this request.", http.StatusUnauthorized)
 		} else {
-			r.URL.Path = "/admin.html"
+			http.ServeFile(w, r, filepath.Join(staticDir, "admin.html"))
-			http.FileServer(Assets).ServeHTTP(w, r)
 		}
 	})
 

picture.go

@@ -1,27 +1,22 @@
 package main
 
 import (
-	"encoding/base64"
 	"errors"
+	"io"
+	"io/ioutil"
 	"image"
 	_ "image/gif"
 	"image/jpeg"
 	_ "image/png"
-	"io"
 	"os"
-	"path"
+	"path/filepath"
 	"sort"
+	"strconv"
 	"time"
 
 	"github.com/nfnt/resize"
 )
 
-type PictureExplorer struct {
-	FileBackend
-	PublishedImgDir string
-	NextImgDir      string
-}
-
 type Picture struct {
 	path       string
 	basename   string
@@ -29,92 +24,143 @@ type Picture struct {
 	UploadTime time.Time `json:"upload_time"`
 }
 
-type ByUploadTime []*Picture
+type ByUploadTime []Picture
 
-func (a ByUploadTime) Len() int      { return len(a) }
+func (a ByUploadTime) Len() int { return len(a) }
 func (a ByUploadTime) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
-func (a ByUploadTime) Less(i, j int) bool {
+func (a ByUploadTime) Less(i, j int) bool { return a[i].UploadTime.Sub(a[j].UploadTime).Nanoseconds() < 0 }
-	return a[i].UploadTime.Sub(a[j].UploadTime).Nanoseconds() < 0
-}
 
-func (e *PictureExplorer) GetNextImages() (pictures []*Picture, err error) {
+func getImages(dir string) ([]Picture, error) {
-	pictures, err = e.ListPictures(e.NextImgDir)
+	if files, err := ioutil.ReadDir(dir); err != nil {
-	sort.Sort(ByUploadTime(pictures))
-	return
-}
-
-func (e *PictureExplorer) GetPublishedImages() (pictures []*Picture, err error) {
-	pictures, err = e.ListPictures(e.PublishedImgDir)
-	sort.Sort(ByUploadTime(pictures))
-	return
-}
-
-func (e *PictureExplorer) GetLastImage() (*Picture, error) {
-	picts, err := e.GetPublishedImages()
-	if err != nil {
 		return nil, err
+	} else {
+		pictures := make([]Picture, 0)
+		for _, file := range files {
+			if !file.IsDir() {
+				filename := file.Name()
+				pictures = append(pictures, Picture{
+					filepath.Join(dir, filename), // Path
+					filename, // Basename
+					filename[:len(filename) - len(filepath.Ext(filename))], // Sanitized filename
+					file.ModTime(), // UploadTime
+				})
+			}
+		}
+		sort.Sort(ByUploadTime(pictures))
+		return pictures, nil
 	}
-
-	return picts[len(picts)-1], nil
 }
 
-func (e *PictureExplorer) GetPublishedImage(fname string) (*Picture, error) {
+func GetNextImages() ([]Picture, error) {
-	return e.GetPictureInfo(e.PublishedImgDir, fname)
+	return getImages(NextImgDir)
 }
 
-func (e *PictureExplorer) GetNextImage(fname string) (*Picture, error) {
+func GetPublishedImages() ([]Picture, error) {
-	return e.GetPictureInfo(e.NextImgDir, fname)
+	return getImages(PublishedImgDir)
 }
 
-func (e *PictureExplorer) IsUniqueName(filename string) bool {
+func GetLastImage() (Picture, error) {
-	if pict, _ := e.GetPublishedImage(filename); pict != nil {
+	if picts, err := GetPublishedImages(); err != nil {
+		return Picture{}, err
+	} else {
+		return picts[len(picts)-1], nil
+	}
+}
+
+func getImage(flist func() ([]Picture, error), fname string) (Picture, error) {
+	if picts, err := flist(); err != nil {
+		return Picture{}, err
+	} else if pid, err := strconv.Atoi(fname); err == nil {
+		if pid < len(picts) {
+			return picts[pid], nil
+		} else {
+			return Picture{}, errors.New("Invalid picture identifier")
+		}
+	} else {
+		for _, pict := range picts {
+			if pict.Name == fname || pict.basename == fname {
+				return pict, nil
+			}
+		}
+		return Picture{}, errors.New("No such picture")
+	}
+}
+
+func GetPublishedImage(fname string) (Picture, error) {
+	return getImage(GetPublishedImages, fname)
+}
+
+func GetNextImage(fname string) (Picture, error) {
+	return getImage(GetNextImages, fname)
+}
+
+func UniqueImage(filename string) (bool) {
+	if pict, _ := GetPublishedImage(filename); pict.path != "" {
 		return false
+	} else {
+		if pict, _ := GetNextImage(filename); pict.path != "" {
+			return false
+		} else {
+			return true
+		}
 	}
-
-	if pict, _ := e.GetNextImage(filename); pict != nil {
-		return false
-	}
-
-	return true
 }
 
-func (e *PictureExplorer) AddImage(filename string, blob io.ReadCloser) error {
+func AddImage(filename string, blob io.ReadCloser) (error) {
 	// Check the name is not already used
-	if ok := e.IsUniqueName(filename); !ok {
+	if ok := UniqueImage(filename); !ok {
 		return errors.New("This filename is already used, please choose another one.")
-	}
 
 	// Convert to JPEG
-	img, _, err := image.Decode(base64.NewDecoder(base64.StdEncoding, blob))
+	} else if img, _, err := image.Decode(blob); err != nil {
-	if err != nil {
 		return err
-	}
 
 	// Save file
-	if err := e.PutPicture(e.NextImgDir, filename, &img); err != nil {
+	} else if fw, err := os.Create(filepath.Join(NextImgDir, filename + ".jpg")); err != nil {
 		return err
+	} else if err := jpeg.Encode(fw, img, nil); err != nil {
+		return err
+	} else {
+		fw.Close()
+
+		thumb := resize.Thumbnail(300, 185, img, resize.Lanczos3)
+
+		// Save thumbnail
+		if fw, err := os.Create(filepath.Join(ThumbsDir, filename + ".jpg")); err != nil {
+			return err
+		} else if err := jpeg.Encode(fw, thumb, nil); err != nil {
+			return err
+		} else {
+			fw.Close()
+		}
 	}
 
-	thumb := resize.Thumbnail(300, 185, img, resize.Lanczos3)
+	return nil
+}
 
-	// Save thumbnail
+func (p Picture) Publish() (error) {
-	fw, err := os.Create(path.Join(ThumbsDir, filename+".jpg"))
+	npath := filepath.Join(PublishedImgDir, p.basename)
-	if err != nil {
+	if err := os.Rename(p.path, npath); err != nil {
 		return err
+	} else if err := os.Chtimes(npath, time.Now(), time.Now()); err != nil {
+		return err
+	} else {
+		return nil
 	}
-	defer fw.Close()
-
-	return jpeg.Encode(fw, thumb, nil)
 }
 
-func (e *PictureExplorer) Publish(p *Picture) error {
+func (p Picture) Unpublish() (error) {
-	return e.MovePicture(e.NextImgDir, e.PublishedImgDir, p.Name)
+	if err := os.Rename(p.path, filepath.Join(NextImgDir, p.basename)); err != nil {
+		return err
+	} else {
+		return nil
+	}
 }
 
-func (e *PictureExplorer) Unpublish(p *Picture) error {
+func (p Picture) Remove() (error) {
-	return e.MovePicture(e.PublishedImgDir, e.NextImgDir, p.Name)
+	if err := os.Remove(p.path); err != nil {
-}
+		return err
-
+	} else {
-func (e *PictureExplorer) Remove(p *Picture) error {
+		return nil
-	return e.DeletePicture(path.Dir(p.path), p.Name)
+	}
 }

renovate.json

@@ -1,10 +0,0 @@
-{
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "packageRules": [
-    {
-      "matchPackageNames": ["github.com/aws/aws-sdk-go"],
-      "automerge": true,
-      "automergeType": "branch"
-    }
-  ]
-}

static.go

@@ -1,14 +0,0 @@
-package main
-
-import (
-	"net/http"
-)
-
-func init() {
-	mux.HandleFunc("/css/", func(w http.ResponseWriter, r *http.Request) {
-		http.FileServer(Assets).ServeHTTP(w, r)
-	})
-	mux.HandleFunc("/js/", func(w http.ResponseWriter, r *http.Request) {
-		http.FileServer(Assets).ServeHTTP(w, r)
-	})
-}

static/admin.html

@@ -4,6 +4,9 @@
     <title>YouP0m Administration</title>
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
     <link rel="stylesheet" media="all" href="/css/style.css">
+    <script type="text/javascript" src="/js/prototype.js"></script>
+    <script type="text/javascript" src="/js/youp0m.js"></script>
+    <script type="text/javascript" src="/js/youp0m-admin.js"></script>
   </head>
   <body>
     <h1>Welcome on YouP0m!</h1>
@@ -16,7 +19,5 @@
     <script type="text/javascript">
       document.write("<h2>We are loading the newest cute pictures for you, please wait&hellip;</h2>");
     </script>
-    <script type="text/javascript" src="/js/youp0m.js"></script>
-    <script type="text/javascript" src="/js/youp0m-admin.js"></script>
   </body>
 </html>

static/css/style.css

@@ -28,24 +28,6 @@ figure.moz {
     vertical-align: middle;
 }
 
-figure.moz .menu {
-    position: absolute;
-    margin: inherit;
-    display: none;
-}
-figure.moz:hover .menu {
-    display: block;
-}
-figure.moz:hover .menu a {
-    background: rgba(0,0,0,0.5);
-    color: #eee;
-    padding: 6px 10px 8px 10px;
-    text-decoration: none;
-}
-figure.moz .menu a:hover {
-    background: rgba(0,0,0,0.8);
-}
-
 .big img {
     max-height: calc(100vh - 5px);
     max-width: calc(100vw - 5px);

static/index.html

@@ -4,6 +4,8 @@
     <title>YouP0m</title>
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
     <link rel="stylesheet" media="all" href="/css/style.css">
+    <script type="text/javascript" src="/js/prototype.js"></script>
+    <script type="text/javascript" src="/js/youp0m.js"></script>
   </head>
   <body>
     <h1>Welcome on YouP0m!</h1>
@@ -16,6 +18,5 @@
     <script type="text/javascript">
       document.write("<h2>We are loading a cute picture just for you, please wait&hellip;</h2>");
     </script>
-    <script type="text/javascript" src="/js/youp0m.js"></script>
   </body>
 </html>

static/js/youp0m-admin.js

@@ -1,47 +1,11 @@
 api_url = "/api/next/";
 img_url = "/images/next/";
 
-function publish_pict(pict) {
+function admin_ctrl(figure) {
-  fetch(api_url + "/" + pict.name + "/publish").then(response => {
+    var menu = document.createElement("ul");
-      picts = null;
+    var item = document.createElement("li", "test");
-      sync()
+    menu.appendChild(item);
-  });
+    figure.appendChild(menu)
-}
-
-function delete_pict(pict) {
-  fetch(api_url + "/" + pict.name, { method: "DELETE" }).then(response => {
-      picts = null;
-      sync()
-  });
-}
-
-function admin_ctrl(pict) {
-    var figure = document.createElement("figure");
-    figure.className = "moz";
-    var img = document.createElement("img");
-    img.src = img_url + pict.name;
-    img.alt = pict.name;
-    var div = document.createElement("div");
-    div.className = "menu"
-    var linkPub = document.createElement("a");
-    linkPub.onclick = function(e) {
-        publish_pict(pict);
-        return false;
-    };
-    linkPub.href = "#";
-    linkPub.innerHTML = "Publier";
-    var linkDel = document.createElement("a");
-    linkDel.onclick = function(e) {
-        delete_pict(pict);
-        return false;
-    };
-    linkDel.href = "#";
-    linkDel.innerHTML = "Supprimer";
-    div.appendChild(linkPub);
-    div.appendChild(linkDel);
-    figure.appendChild(div);
-    figure.appendChild(img);
-    document.body.appendChild(figure);
 }
 
 function sync() {

static/js/youp0m.js

@@ -3,54 +3,41 @@ var api_url = "/api/images";
 var img_url = "/images/";
 
 function get_picts(then, then_value) {
-  fetch(api_url)
+    new Ajax.Request(api_url, {
-    .then(function(response) {
+	method: 'get',
-      return response.json();
+	onSuccess: function(transport) {
-    })
+	    picts = transport.responseText.evalJSON();
-    .then(function(my_picts) {
+	    if (then) then(then_value);
-      picts = my_picts;
+	},
-      if (then) then(then_value);
-    })
-    .catch(function(error) {
-      display_error(error);
     });
 }
 
-function show_mozaic(callpict) {
+function show_mozaic() {
     if (!picts) {
-        get_picts(show_mozaic, callpict);
+	get_picts(show_mozaic);
 	return;
     }
 
-    if (!picts.length) {
-        document.body.innerHTML = '<h1>Welcome on YouP0m!</h1><h2>There is no image currently, come back soon!</h2>';
-        return;
-    }
-
-    if (!callpict) {
-        callpict = function (pict) {
-	    var figure = document.createElement("figure");
-	    figure.className = "moz";
-	    var img = document.createElement("img");
-	    img.src = img_url + pict.name;
-	    img.alt = pict.name;
-	    var link = document.createElement("a");
-	    link.onclick = function(e) {
-	        window.history.pushState(null, "YouP0m", link.href);
-	        sync();
-	        return false;
-	    };
-	    link.href = "/" + pict.name;
-	    link.appendChild(img);
-	    figure.appendChild(link);
-	    document.body.appendChild(figure);
-	}
-    }
-
     while (document.body.hasChildNodes())
 	document.body.removeChild(document.body.lastChild);
 
-    picts.forEach(callpict);
+    picts.forEach(function (pict) {
+	var figure = document.createElement("figure");
+	figure.className = "moz";
+	var img = document.createElement("img");
+	img.src = img_url + pict.name;
+	img.alt = pict.name;
+	var link = document.createElement("a");
+	link.onclick = function(e) {
+	    window.history.pushState(null, "YouP0m", link.href);
+	    sync();
+	    return false;
+	};
+	link.href = "/" + pict.name;
+	link.appendChild(img);
+	figure.appendChild(link);
+	document.body.appendChild(figure);
+    });
 }
 
 function show_picture(id) {
@@ -59,11 +46,6 @@ function show_picture(id) {
 	return;
     }
 
-    if (picts.length == 0) {
-        document.body.innerHTML = '<h1>Welcome on YouP0m!</h1><h2>There is no image currently, come back soon!</h2>';
-        return
-    }
-
     if (id == null || id == "")
 	id = picts[Math.floor(Math.random() * picts.length)].name;
 
@@ -87,16 +69,16 @@ function show_picture(id) {
 
 function get_picture(id) {
     if (id == null) id = "last";
-
+    new Ajax.Request(api_url + "/" + id, {
-  fetch(api_url + "/" + id)
+	method: 'get',
-    .then(function(response) {
+	onSuccess: function(transport) {
-      return response.json();
+	    var response = transport.responseText.evalJSON();
-    })
+	    display_picture(response);
-    .then(function(my_pict) {
+	},
-      display_picture(my_pict);
+	onFailure: function(transport) {
-    })
+	    var response = transport.responseText.evalJSON();
-    .catch(function(error) {
+	    display_error(response["errmsg"]);
-      display_error(error);
+	}
     });
 }
 
@@ -126,7 +108,7 @@ function display_picture(pict, next) {
 }
 
 function display_error(msg) {
-    document.body.innerHTML = '<h1>An error occurs</h1><h2>' + msg + '</h2>';
+    $$("body")[0].innerHTML = '<h1>An error occurs</h1><h2>' + msg + '</h2>';
 }
 
 function sync() {

vendor/github.com/nfnt/resize/.travis.yml

@@ -0,0 +1,7 @@
+language: go
+
+go:
+  - 1.1
+  - 1.2
+  - 1.3
+  - tip

vendor/github.com/nfnt/resize/LICENSE

@@ -0,0 +1,13 @@
+Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.

vendor/github.com/nfnt/resize/README.md

@@ -0,0 +1,149 @@
+Resize
+======
+
+Image resizing for the [Go programming language](http://golang.org) with common interpolation methods.
+
+[![Build Status](https://travis-ci.org/nfnt/resize.svg)](https://travis-ci.org/nfnt/resize)
+
+Installation
+------------
+
+```bash
+$ go get github.com/nfnt/resize
+```
+
+It's that easy!
+
+Usage
+-----
+
+This package needs at least Go 1.1. Import package with
+
+```go
+import "github.com/nfnt/resize"
+```
+
+The resize package provides 2 functions:
+
+* `resize.Resize` creates a scaled image with new dimensions (`width`, `height`) using the interpolation function `interp`.
+  If either `width` or `height` is set to 0, it will be set to an aspect ratio preserving value.
+* `resize.Thumbnail` downscales an image preserving its aspect ratio to the maximum dimensions (`maxWidth`, `maxHeight`).
+  It will return the original image if original sizes are smaller than the provided dimensions.
+
+```go
+resize.Resize(width, height uint, img image.Image, interp resize.InterpolationFunction) image.Image
+resize.Thumbnail(maxWidth, maxHeight uint, img image.Image, interp resize.InterpolationFunction) image.Image
+```
+
+The provided interpolation functions are (from fast to slow execution time)
+
+- `NearestNeighbor`: [Nearest-neighbor interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation)
+- `Bilinear`: [Bilinear interpolation](http://en.wikipedia.org/wiki/Bilinear_interpolation)
+- `Bicubic`: [Bicubic interpolation](http://en.wikipedia.org/wiki/Bicubic_interpolation)
+- `MitchellNetravali`: [Mitchell-Netravali interpolation](http://dl.acm.org/citation.cfm?id=378514)
+- `Lanczos2`: [Lanczos resampling](http://en.wikipedia.org/wiki/Lanczos_resampling) with a=2
+- `Lanczos3`: [Lanczos resampling](http://en.wikipedia.org/wiki/Lanczos_resampling) with a=3
+
+Which of these methods gives the best results depends on your use case.
+
+Sample usage:
+
+```go
+package main
+
+import (
+	"github.com/nfnt/resize"
+	"image/jpeg"
+	"log"
+	"os"
+)
+
+func main() {
+	// open "test.jpg"
+	file, err := os.Open("test.jpg")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// decode jpeg into image.Image
+	img, err := jpeg.Decode(file)
+	if err != nil {
+		log.Fatal(err)
+	}
+	file.Close()
+
+	// resize to width 1000 using Lanczos resampling
+	// and preserve aspect ratio
+	m := resize.Resize(1000, 0, img, resize.Lanczos3)
+
+	out, err := os.Create("test_resized.jpg")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer out.Close()
+
+	// write new image to file
+	jpeg.Encode(out, m, nil)
+}
+```
+
+Caveats
+-------
+
+* Optimized access routines are used for `image.RGBA`, `image.NRGBA`, `image.RGBA64`, `image.NRGBA64`, `image.YCbCr`, `image.Gray`, and `image.Gray16` types. All other image types are accessed in a generic way that will result in slow processing speed.
+* JPEG images are stored in `image.YCbCr`. This image format stores data in a way that will decrease processing speed. A resize may be up to 2 times slower than with `image.RGBA`. 
+
+
+Downsizing Samples
+-------
+
+Downsizing is not as simple as it might look like. Images have to be filtered before they are scaled down, otherwise aliasing might occur.
+Filtering is highly subjective: Applying too much will blur the whole image, too little will make aliasing become apparent.
+Resize tries to provide sane defaults that should suffice in most cases.
+
+### Artificial sample
+
+Original image
+![Rings](http://nfnt.github.com/img/rings_lg_orig.png)
+
+<table>
+<tr>
+<th><img src="http://nfnt.github.com/img/rings_300_NearestNeighbor.png" /><br>Nearest-Neighbor</th>
+<th><img src="http://nfnt.github.com/img/rings_300_Bilinear.png" /><br>Bilinear</th>
+</tr>
+<tr>
+<th><img src="http://nfnt.github.com/img/rings_300_Bicubic.png" /><br>Bicubic</th>
+<th><img src="http://nfnt.github.com/img/rings_300_MitchellNetravali.png" /><br>Mitchell-Netravali</th>
+</tr>
+<tr>
+<th><img src="http://nfnt.github.com/img/rings_300_Lanczos2.png" /><br>Lanczos2</th>
+<th><img src="http://nfnt.github.com/img/rings_300_Lanczos3.png" /><br>Lanczos3</th>
+</tr>
+</table>
+
+### Real-Life sample
+
+Original image  
+![Original](http://nfnt.github.com/img/IMG_3694_720.jpg)
+
+<table>
+<tr>
+<th><img src="http://nfnt.github.com/img/IMG_3694_300_NearestNeighbor.png" /><br>Nearest-Neighbor</th>
+<th><img src="http://nfnt.github.com/img/IMG_3694_300_Bilinear.png" /><br>Bilinear</th>
+</tr>
+<tr>
+<th><img src="http://nfnt.github.com/img/IMG_3694_300_Bicubic.png" /><br>Bicubic</th>
+<th><img src="http://nfnt.github.com/img/IMG_3694_300_MitchellNetravali.png" /><br>Mitchell-Netravali</th>
+</tr>
+<tr>
+<th><img src="http://nfnt.github.com/img/IMG_3694_300_Lanczos2.png" /><br>Lanczos2</th>
+<th><img src="http://nfnt.github.com/img/IMG_3694_300_Lanczos3.png" /><br>Lanczos3</th>
+</tr>
+</table>
+
+
+License
+-------
+
+Copyright (c) 2012 Jan Schlicht <janschlicht@gmail.com>
+Resize is released under a MIT style license.

vendor/github.com/nfnt/resize/converter.go

@@ -0,0 +1,438 @@
+/*
+Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+*/
+
+package resize
+
+import "image"
+
+// Keep value in [0,255] range.
+func clampUint8(in int32) uint8 {
+	// casting a negative int to an uint will result in an overflown
+	// large uint. this behavior will be exploited here and in other functions
+	// to achieve a higher performance.
+	if uint32(in) < 256 {
+		return uint8(in)
+	}
+	if in > 255 {
+		return 255
+	}
+	return 0
+}
+
+// Keep value in [0,65535] range.
+func clampUint16(in int64) uint16 {
+	if uint64(in) < 65536 {
+		return uint16(in)
+	}
+	if in > 65535 {
+		return 65535
+	}
+	return 0
+}
+
+func resizeGeneric(in image.Image, out *image.RGBA64, scale float64, coeffs []int32, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]int64
+			var sum int64
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				coeff := coeffs[ci+i]
+				if coeff != 0 {
+					xi := start + i
+					switch {
+					case xi < 0:
+						xi = 0
+					case xi >= maxX:
+						xi = maxX
+					}
+
+					r, g, b, a := in.At(xi+in.Bounds().Min.X, x+in.Bounds().Min.Y).RGBA()
+
+					rgba[0] += int64(coeff) * int64(r)
+					rgba[1] += int64(coeff) * int64(g)
+					rgba[2] += int64(coeff) * int64(b)
+					rgba[3] += int64(coeff) * int64(a)
+					sum += int64(coeff)
+				}
+			}
+
+			offset := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
+
+			value := clampUint16(rgba[0] / sum)
+			out.Pix[offset+0] = uint8(value >> 8)
+			out.Pix[offset+1] = uint8(value)
+			value = clampUint16(rgba[1] / sum)
+			out.Pix[offset+2] = uint8(value >> 8)
+			out.Pix[offset+3] = uint8(value)
+			value = clampUint16(rgba[2] / sum)
+			out.Pix[offset+4] = uint8(value >> 8)
+			out.Pix[offset+5] = uint8(value)
+			value = clampUint16(rgba[3] / sum)
+			out.Pix[offset+6] = uint8(value >> 8)
+			out.Pix[offset+7] = uint8(value)
+		}
+	}
+}
+
+func resizeRGBA(in *image.RGBA, out *image.RGBA, scale float64, coeffs []int16, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]int32
+			var sum int32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				coeff := coeffs[ci+i]
+				if coeff != 0 {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 4
+					case xi >= maxX:
+						xi = 4 * maxX
+					default:
+						xi = 0
+					}
+
+					rgba[0] += int32(coeff) * int32(row[xi+0])
+					rgba[1] += int32(coeff) * int32(row[xi+1])
+					rgba[2] += int32(coeff) * int32(row[xi+2])
+					rgba[3] += int32(coeff) * int32(row[xi+3])
+					sum += int32(coeff)
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
+
+			out.Pix[xo+0] = clampUint8(rgba[0] / sum)
+			out.Pix[xo+1] = clampUint8(rgba[1] / sum)
+			out.Pix[xo+2] = clampUint8(rgba[2] / sum)
+			out.Pix[xo+3] = clampUint8(rgba[3] / sum)
+		}
+	}
+}
+
+func resizeNRGBA(in *image.NRGBA, out *image.RGBA, scale float64, coeffs []int16, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]int32
+			var sum int32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				coeff := coeffs[ci+i]
+				if coeff != 0 {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 4
+					case xi >= maxX:
+						xi = 4 * maxX
+					default:
+						xi = 0
+					}
+
+					rgba[0] += int32(coeff) * int32(row[xi+0])
+					rgba[1] += int32(coeff) * int32(row[xi+1])
+					rgba[2] += int32(coeff) * int32(row[xi+2])
+					rgba[3] += int32(coeff) * int32(row[xi+3])
+					sum += int32(coeff)
+
+					// Forward alpha-premultiplication
+					a := int32(row[xi+3])
+					rgba[0] *= a
+					rgba[0] /= 0xff
+					rgba[1] *= a
+					rgba[1] /= 0xff
+					rgba[2] *= a
+					rgba[2] /= 0xff
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
+
+			out.Pix[xo+0] = clampUint8(rgba[0] / sum)
+			out.Pix[xo+1] = clampUint8(rgba[1] / sum)
+			out.Pix[xo+2] = clampUint8(rgba[2] / sum)
+			out.Pix[xo+3] = clampUint8(rgba[3] / sum)
+		}
+	}
+}
+
+func resizeRGBA64(in *image.RGBA64, out *image.RGBA64, scale float64, coeffs []int32, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]int64
+			var sum int64
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				coeff := coeffs[ci+i]
+				if coeff != 0 {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 8
+					case xi >= maxX:
+						xi = 8 * maxX
+					default:
+						xi = 0
+					}
+
+					rgba[0] += int64(coeff) * (int64(row[xi+0])<<8 | int64(row[xi+1]))
+					rgba[1] += int64(coeff) * (int64(row[xi+2])<<8 | int64(row[xi+3]))
+					rgba[2] += int64(coeff) * (int64(row[xi+4])<<8 | int64(row[xi+5]))
+					rgba[3] += int64(coeff) * (int64(row[xi+6])<<8 | int64(row[xi+7]))
+					sum += int64(coeff)
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
+
+			value := clampUint16(rgba[0] / sum)
+			out.Pix[xo+0] = uint8(value >> 8)
+			out.Pix[xo+1] = uint8(value)
+			value = clampUint16(rgba[1] / sum)
+			out.Pix[xo+2] = uint8(value >> 8)
+			out.Pix[xo+3] = uint8(value)
+			value = clampUint16(rgba[2] / sum)
+			out.Pix[xo+4] = uint8(value >> 8)
+			out.Pix[xo+5] = uint8(value)
+			value = clampUint16(rgba[3] / sum)
+			out.Pix[xo+6] = uint8(value >> 8)
+			out.Pix[xo+7] = uint8(value)
+		}
+	}
+}
+
+func resizeNRGBA64(in *image.NRGBA64, out *image.RGBA64, scale float64, coeffs []int32, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]int64
+			var sum int64
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				coeff := coeffs[ci+i]
+				if coeff != 0 {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 8
+					case xi >= maxX:
+						xi = 8 * maxX
+					default:
+						xi = 0
+					}
+
+					rgba[0] += int64(coeff) * int64(uint16(row[xi+0])<<8|uint16(row[xi+1]))
+					rgba[1] += int64(coeff) * int64(uint16(row[xi+2])<<8|uint16(row[xi+3]))
+					rgba[2] += int64(coeff) * int64(uint16(row[xi+4])<<8|uint16(row[xi+5]))
+					rgba[3] += int64(coeff) * int64(uint16(row[xi+6])<<8|uint16(row[xi+7]))
+					sum += int64(coeff)
+
+					// Forward alpha-premultiplication
+					a := int64(uint16(row[xi+6])<<8 | uint16(row[xi+7]))
+					rgba[0] *= a
+					rgba[0] /= 0xffff
+					rgba[1] *= a
+					rgba[1] /= 0xffff
+					rgba[2] *= a
+					rgba[2] /= 0xffff
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
+
+			value := clampUint16(rgba[0] / sum)
+			out.Pix[xo+0] = uint8(value >> 8)
+			out.Pix[xo+1] = uint8(value)
+			value = clampUint16(rgba[1] / sum)
+			out.Pix[xo+2] = uint8(value >> 8)
+			out.Pix[xo+3] = uint8(value)
+			value = clampUint16(rgba[2] / sum)
+			out.Pix[xo+4] = uint8(value >> 8)
+			out.Pix[xo+5] = uint8(value)
+			value = clampUint16(rgba[3] / sum)
+			out.Pix[xo+6] = uint8(value >> 8)
+			out.Pix[xo+7] = uint8(value)
+		}
+	}
+}
+
+func resizeGray(in *image.Gray, out *image.Gray, scale float64, coeffs []int16, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[(x-newBounds.Min.X)*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var gray int32
+			var sum int32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				coeff := coeffs[ci+i]
+				if coeff != 0 {
+					xi := start + i
+					switch {
+					case xi < 0:
+						xi = 0
+					case xi >= maxX:
+						xi = maxX
+					}
+					gray += int32(coeff) * int32(row[xi])
+					sum += int32(coeff)
+				}
+			}
+
+			offset := (y-newBounds.Min.Y)*out.Stride + (x - newBounds.Min.X)
+			out.Pix[offset] = clampUint8(gray / sum)
+		}
+	}
+}
+
+func resizeGray16(in *image.Gray16, out *image.Gray16, scale float64, coeffs []int32, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var gray int64
+			var sum int64
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				coeff := coeffs[ci+i]
+				if coeff != 0 {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 2
+					case xi >= maxX:
+						xi = 2 * maxX
+					default:
+						xi = 0
+					}
+					gray += int64(coeff) * int64(uint16(row[xi+0])<<8|uint16(row[xi+1]))
+					sum += int64(coeff)
+				}
+			}
+
+			offset := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*2
+			value := clampUint16(gray / sum)
+			out.Pix[offset+0] = uint8(value >> 8)
+			out.Pix[offset+1] = uint8(value)
+		}
+	}
+}
+
+func resizeYCbCr(in *ycc, out *ycc, scale float64, coeffs []int16, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var p [3]int32
+			var sum int32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				coeff := coeffs[ci+i]
+				if coeff != 0 {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 3
+					case xi >= maxX:
+						xi = 3 * maxX
+					default:
+						xi = 0
+					}
+					p[0] += int32(coeff) * int32(row[xi+0])
+					p[1] += int32(coeff) * int32(row[xi+1])
+					p[2] += int32(coeff) * int32(row[xi+2])
+					sum += int32(coeff)
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*3
+			out.Pix[xo+0] = clampUint8(p[0] / sum)
+			out.Pix[xo+1] = clampUint8(p[1] / sum)
+			out.Pix[xo+2] = clampUint8(p[2] / sum)
+		}
+	}
+}
+
+func nearestYCbCr(in *ycc, out *ycc, scale float64, coeffs []bool, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var p [3]float32
+			var sum float32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				if coeffs[ci+i] {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 3
+					case xi >= maxX:
+						xi = 3 * maxX
+					default:
+						xi = 0
+					}
+					p[0] += float32(row[xi+0])
+					p[1] += float32(row[xi+1])
+					p[2] += float32(row[xi+2])
+					sum++
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*3
+			out.Pix[xo+0] = floatToUint8(p[0] / sum)
+			out.Pix[xo+1] = floatToUint8(p[1] / sum)
+			out.Pix[xo+2] = floatToUint8(p[2] / sum)
+		}
+	}
+}

vendor/github.com/nfnt/resize/converter_test.go

@@ -0,0 +1,43 @@
+package resize
+
+import (
+	"testing"
+)
+
+func Test_ClampUint8(t *testing.T) {
+	var testData = []struct {
+		in       int32
+		expected uint8
+	}{
+		{0, 0},
+		{255, 255},
+		{128, 128},
+		{-2, 0},
+		{256, 255},
+	}
+	for _, test := range testData {
+		actual := clampUint8(test.in)
+		if actual != test.expected {
+			t.Fail()
+		}
+	}
+}
+
+func Test_ClampUint16(t *testing.T) {
+	var testData = []struct {
+		in       int64
+		expected uint16
+	}{
+		{0, 0},
+		{65535, 65535},
+		{128, 128},
+		{-2, 0},
+		{65536, 65535},
+	}
+	for _, test := range testData {
+		actual := clampUint16(test.in)
+		if actual != test.expected {
+			t.Fail()
+		}
+	}
+}

vendor/github.com/nfnt/resize/filters.go

@@ -0,0 +1,143 @@
+/*
+Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+*/
+
+package resize
+
+import (
+	"math"
+)
+
+func nearest(in float64) float64 {
+	if in >= -0.5 && in < 0.5 {
+		return 1
+	}
+	return 0
+}
+
+func linear(in float64) float64 {
+	in = math.Abs(in)
+	if in <= 1 {
+		return 1 - in
+	}
+	return 0
+}
+
+func cubic(in float64) float64 {
+	in = math.Abs(in)
+	if in <= 1 {
+		return in*in*(1.5*in-2.5) + 1.0
+	}
+	if in <= 2 {
+		return in*(in*(2.5-0.5*in)-4.0) + 2.0
+	}
+	return 0
+}
+
+func mitchellnetravali(in float64) float64 {
+	in = math.Abs(in)
+	if in <= 1 {
+		return (7.0*in*in*in - 12.0*in*in + 5.33333333333) * 0.16666666666
+	}
+	if in <= 2 {
+		return (-2.33333333333*in*in*in + 12.0*in*in - 20.0*in + 10.6666666667) * 0.16666666666
+	}
+	return 0
+}
+
+func sinc(x float64) float64 {
+	x = math.Abs(x) * math.Pi
+	if x >= 1.220703e-4 {
+		return math.Sin(x) / x
+	}
+	return 1
+}
+
+func lanczos2(in float64) float64 {
+	if in > -2 && in < 2 {
+		return sinc(in) * sinc(in*0.5)
+	}
+	return 0
+}
+
+func lanczos3(in float64) float64 {
+	if in > -3 && in < 3 {
+		return sinc(in) * sinc(in*0.3333333333333333)
+	}
+	return 0
+}
+
+// range [-256,256]
+func createWeights8(dy, filterLength int, blur, scale float64, kernel func(float64) float64) ([]int16, []int, int) {
+	filterLength = filterLength * int(math.Max(math.Ceil(blur*scale), 1))
+	filterFactor := math.Min(1./(blur*scale), 1)
+
+	coeffs := make([]int16, dy*filterLength)
+	start := make([]int, dy)
+	for y := 0; y < dy; y++ {
+		interpX := scale*(float64(y)+0.5) - 0.5
+		start[y] = int(interpX) - filterLength/2 + 1
+		interpX -= float64(start[y])
+		for i := 0; i < filterLength; i++ {
+			in := (interpX - float64(i)) * filterFactor
+			coeffs[y*filterLength+i] = int16(kernel(in) * 256)
+		}
+	}
+
+	return coeffs, start, filterLength
+}
+
+// range [-65536,65536]
+func createWeights16(dy, filterLength int, blur, scale float64, kernel func(float64) float64) ([]int32, []int, int) {
+	filterLength = filterLength * int(math.Max(math.Ceil(blur*scale), 1))
+	filterFactor := math.Min(1./(blur*scale), 1)
+
+	coeffs := make([]int32, dy*filterLength)
+	start := make([]int, dy)
+	for y := 0; y < dy; y++ {
+		interpX := scale*(float64(y)+0.5) - 0.5
+		start[y] = int(interpX) - filterLength/2 + 1
+		interpX -= float64(start[y])
+		for i := 0; i < filterLength; i++ {
+			in := (interpX - float64(i)) * filterFactor
+			coeffs[y*filterLength+i] = int32(kernel(in) * 65536)
+		}
+	}
+
+	return coeffs, start, filterLength
+}
+
+func createWeightsNearest(dy, filterLength int, blur, scale float64) ([]bool, []int, int) {
+	filterLength = filterLength * int(math.Max(math.Ceil(blur*scale), 1))
+	filterFactor := math.Min(1./(blur*scale), 1)
+
+	coeffs := make([]bool, dy*filterLength)
+	start := make([]int, dy)
+	for y := 0; y < dy; y++ {
+		interpX := scale*(float64(y)+0.5) - 0.5
+		start[y] = int(interpX) - filterLength/2 + 1
+		interpX -= float64(start[y])
+		for i := 0; i < filterLength; i++ {
+			in := (interpX - float64(i)) * filterFactor
+			if in >= -0.5 && in < 0.5 {
+				coeffs[y*filterLength+i] = true
+			} else {
+				coeffs[y*filterLength+i] = false
+			}
+		}
+	}
+
+	return coeffs, start, filterLength
+}

vendor/github.com/nfnt/resize/nearest.go

@@ -0,0 +1,318 @@
+/*
+Copyright (c) 2014, Charlie Vieth <charlie.vieth@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+*/
+
+package resize
+
+import "image"
+
+func floatToUint8(x float32) uint8 {
+	// Nearest-neighbor values are always
+	// positive no need to check lower-bound.
+	if x > 0xfe {
+		return 0xff
+	}
+	return uint8(x)
+}
+
+func floatToUint16(x float32) uint16 {
+	if x > 0xfffe {
+		return 0xffff
+	}
+	return uint16(x)
+}
+
+func nearestGeneric(in image.Image, out *image.RGBA64, scale float64, coeffs []bool, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]float32
+			var sum float32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				if coeffs[ci+i] {
+					xi := start + i
+					switch {
+					case xi < 0:
+						xi = 0
+					case xi >= maxX:
+						xi = maxX
+					}
+					r, g, b, a := in.At(xi+in.Bounds().Min.X, x+in.Bounds().Min.Y).RGBA()
+					rgba[0] += float32(r)
+					rgba[1] += float32(g)
+					rgba[2] += float32(b)
+					rgba[3] += float32(a)
+					sum++
+				}
+			}
+
+			offset := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
+			value := floatToUint16(rgba[0] / sum)
+			out.Pix[offset+0] = uint8(value >> 8)
+			out.Pix[offset+1] = uint8(value)
+			value = floatToUint16(rgba[1] / sum)
+			out.Pix[offset+2] = uint8(value >> 8)
+			out.Pix[offset+3] = uint8(value)
+			value = floatToUint16(rgba[2] / sum)
+			out.Pix[offset+4] = uint8(value >> 8)
+			out.Pix[offset+5] = uint8(value)
+			value = floatToUint16(rgba[3] / sum)
+			out.Pix[offset+6] = uint8(value >> 8)
+			out.Pix[offset+7] = uint8(value)
+		}
+	}
+}
+
+func nearestRGBA(in *image.RGBA, out *image.RGBA, scale float64, coeffs []bool, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]float32
+			var sum float32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				if coeffs[ci+i] {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 4
+					case xi >= maxX:
+						xi = 4 * maxX
+					default:
+						xi = 0
+					}
+					rgba[0] += float32(row[xi+0])
+					rgba[1] += float32(row[xi+1])
+					rgba[2] += float32(row[xi+2])
+					rgba[3] += float32(row[xi+3])
+					sum++
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
+			out.Pix[xo+0] = floatToUint8(rgba[0] / sum)
+			out.Pix[xo+1] = floatToUint8(rgba[1] / sum)
+			out.Pix[xo+2] = floatToUint8(rgba[2] / sum)
+			out.Pix[xo+3] = floatToUint8(rgba[3] / sum)
+		}
+	}
+}
+
+func nearestNRGBA(in *image.NRGBA, out *image.NRGBA, scale float64, coeffs []bool, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]float32
+			var sum float32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				if coeffs[ci+i] {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 4
+					case xi >= maxX:
+						xi = 4 * maxX
+					default:
+						xi = 0
+					}
+					rgba[0] += float32(row[xi+0])
+					rgba[1] += float32(row[xi+1])
+					rgba[2] += float32(row[xi+2])
+					rgba[3] += float32(row[xi+3])
+					sum++
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
+			out.Pix[xo+0] = floatToUint8(rgba[0] / sum)
+			out.Pix[xo+1] = floatToUint8(rgba[1] / sum)
+			out.Pix[xo+2] = floatToUint8(rgba[2] / sum)
+			out.Pix[xo+3] = floatToUint8(rgba[3] / sum)
+		}
+	}
+}
+
+func nearestRGBA64(in *image.RGBA64, out *image.RGBA64, scale float64, coeffs []bool, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]float32
+			var sum float32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				if coeffs[ci+i] {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 8
+					case xi >= maxX:
+						xi = 8 * maxX
+					default:
+						xi = 0
+					}
+					rgba[0] += float32(uint16(row[xi+0])<<8 | uint16(row[xi+1]))
+					rgba[1] += float32(uint16(row[xi+2])<<8 | uint16(row[xi+3]))
+					rgba[2] += float32(uint16(row[xi+4])<<8 | uint16(row[xi+5]))
+					rgba[3] += float32(uint16(row[xi+6])<<8 | uint16(row[xi+7]))
+					sum++
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
+			value := floatToUint16(rgba[0] / sum)
+			out.Pix[xo+0] = uint8(value >> 8)
+			out.Pix[xo+1] = uint8(value)
+			value = floatToUint16(rgba[1] / sum)
+			out.Pix[xo+2] = uint8(value >> 8)
+			out.Pix[xo+3] = uint8(value)
+			value = floatToUint16(rgba[2] / sum)
+			out.Pix[xo+4] = uint8(value >> 8)
+			out.Pix[xo+5] = uint8(value)
+			value = floatToUint16(rgba[3] / sum)
+			out.Pix[xo+6] = uint8(value >> 8)
+			out.Pix[xo+7] = uint8(value)
+		}
+	}
+}
+
+func nearestNRGBA64(in *image.NRGBA64, out *image.NRGBA64, scale float64, coeffs []bool, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var rgba [4]float32
+			var sum float32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				if coeffs[ci+i] {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 8
+					case xi >= maxX:
+						xi = 8 * maxX
+					default:
+						xi = 0
+					}
+					rgba[0] += float32(uint16(row[xi+0])<<8 | uint16(row[xi+1]))
+					rgba[1] += float32(uint16(row[xi+2])<<8 | uint16(row[xi+3]))
+					rgba[2] += float32(uint16(row[xi+4])<<8 | uint16(row[xi+5]))
+					rgba[3] += float32(uint16(row[xi+6])<<8 | uint16(row[xi+7]))
+					sum++
+				}
+			}
+
+			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
+			value := floatToUint16(rgba[0] / sum)
+			out.Pix[xo+0] = uint8(value >> 8)
+			out.Pix[xo+1] = uint8(value)
+			value = floatToUint16(rgba[1] / sum)
+			out.Pix[xo+2] = uint8(value >> 8)
+			out.Pix[xo+3] = uint8(value)
+			value = floatToUint16(rgba[2] / sum)
+			out.Pix[xo+4] = uint8(value >> 8)
+			out.Pix[xo+5] = uint8(value)
+			value = floatToUint16(rgba[3] / sum)
+			out.Pix[xo+6] = uint8(value >> 8)
+			out.Pix[xo+7] = uint8(value)
+		}
+	}
+}
+
+func nearestGray(in *image.Gray, out *image.Gray, scale float64, coeffs []bool, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var gray float32
+			var sum float32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				if coeffs[ci+i] {
+					xi := start + i
+					switch {
+					case xi < 0:
+						xi = 0
+					case xi >= maxX:
+						xi = maxX
+					}
+					gray += float32(row[xi])
+					sum++
+				}
+			}
+
+			offset := (y-newBounds.Min.Y)*out.Stride + (x - newBounds.Min.X)
+			out.Pix[offset] = floatToUint8(gray / sum)
+		}
+	}
+}
+
+func nearestGray16(in *image.Gray16, out *image.Gray16, scale float64, coeffs []bool, offset []int, filterLength int) {
+	newBounds := out.Bounds()
+	maxX := in.Bounds().Dx() - 1
+
+	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
+		row := in.Pix[x*in.Stride:]
+		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
+			var gray float32
+			var sum float32
+			start := offset[y]
+			ci := y * filterLength
+			for i := 0; i < filterLength; i++ {
+				if coeffs[ci+i] {
+					xi := start + i
+					switch {
+					case uint(xi) < uint(maxX):
+						xi *= 2
+					case xi >= maxX:
+						xi = 2 * maxX
+					default:
+						xi = 0
+					}
+					gray += float32(uint16(row[xi+0])<<8 | uint16(row[xi+1]))
+					sum++
+				}
+			}
+
+			offset := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*2
+			value := floatToUint16(gray / sum)
+			out.Pix[offset+0] = uint8(value >> 8)
+			out.Pix[offset+1] = uint8(value)
+		}
+	}
+}

vendor/github.com/nfnt/resize/nearest_test.go

@@ -0,0 +1,57 @@
+/*
+Copyright (c) 2014, Charlie Vieth <charlie.vieth@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+*/
+
+package resize
+
+import "testing"
+
+func Test_FloatToUint8(t *testing.T) {
+	var testData = []struct {
+		in       float32
+		expected uint8
+	}{
+		{0, 0},
+		{255, 255},
+		{128, 128},
+		{1, 1},
+		{256, 255},
+	}
+	for _, test := range testData {
+		actual := floatToUint8(test.in)
+		if actual != test.expected {
+			t.Fail()
+		}
+	}
+}
+
+func Test_FloatToUint16(t *testing.T) {
+	var testData = []struct {
+		in       float32
+		expected uint16
+	}{
+		{0, 0},
+		{65535, 65535},
+		{128, 128},
+		{1, 1},
+		{65536, 65535},
+	}
+	for _, test := range testData {
+		actual := floatToUint16(test.in)
+		if actual != test.expected {
+			t.Fail()
+		}
+	}
+}

vendor/github.com/nfnt/resize/resize.go

@@ -0,0 +1,614 @@
+/*
+Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+*/
+
+// Package resize implements various image resizing methods.
+//
+// The package works with the Image interface described in the image package.
+// Various interpolation methods are provided and multiple processors may be
+// utilized in the computations.
+//
+// Example:
+//     imgResized := resize.Resize(1000, 0, imgOld, resize.MitchellNetravali)
+package resize
+
+import (
+	"image"
+	"runtime"
+	"sync"
+)
+
+// An InterpolationFunction provides the parameters that describe an
+// interpolation kernel. It returns the number of samples to take
+// and the kernel function to use for sampling.
+type InterpolationFunction int
+
+// InterpolationFunction constants
+const (
+	// Nearest-neighbor interpolation
+	NearestNeighbor InterpolationFunction = iota
+	// Bilinear interpolation
+	Bilinear
+	// Bicubic interpolation (with cubic hermite spline)
+	Bicubic
+	// Mitchell-Netravali interpolation
+	MitchellNetravali
+	// Lanczos interpolation (a=2)
+	Lanczos2
+	// Lanczos interpolation (a=3)
+	Lanczos3
+)
+
+// kernal, returns an InterpolationFunctions taps and kernel.
+func (i InterpolationFunction) kernel() (int, func(float64) float64) {
+	switch i {
+	case Bilinear:
+		return 2, linear
+	case Bicubic:
+		return 4, cubic
+	case MitchellNetravali:
+		return 4, mitchellnetravali
+	case Lanczos2:
+		return 4, lanczos2
+	case Lanczos3:
+		return 6, lanczos3
+	default:
+		// Default to NearestNeighbor.
+		return 2, nearest
+	}
+}
+
+// values <1 will sharpen the image
+var blur = 1.0
+
+// Resize scales an image to new width and height using the interpolation function interp.
+// A new image with the given dimensions will be returned.
+// If one of the parameters width or height is set to 0, its size will be calculated so that
+// the aspect ratio is that of the originating image.
+// The resizing algorithm uses channels for parallel computation.
+func Resize(width, height uint, img image.Image, interp InterpolationFunction) image.Image {
+	scaleX, scaleY := calcFactors(width, height, float64(img.Bounds().Dx()), float64(img.Bounds().Dy()))
+	if width == 0 {
+		width = uint(0.7 + float64(img.Bounds().Dx())/scaleX)
+	}
+	if height == 0 {
+		height = uint(0.7 + float64(img.Bounds().Dy())/scaleY)
+	}
+
+	// Trivial case: return input image
+	if int(width) == img.Bounds().Dx() && int(height) == img.Bounds().Dy() {
+		return img
+	}
+
+	if interp == NearestNeighbor {
+		return resizeNearest(width, height, scaleX, scaleY, img, interp)
+	}
+
+	taps, kernel := interp.kernel()
+	cpus := runtime.GOMAXPROCS(0)
+	wg := sync.WaitGroup{}
+
+	// Generic access to image.Image is slow in tight loops.
+	// The optimal access has to be determined from the concrete image type.
+	switch input := img.(type) {
+	case *image.RGBA:
+		// 8-bit precision
+		temp := image.NewRGBA(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewRGBA(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeights8(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.RGBA)
+			go func() {
+				defer wg.Done()
+				resizeRGBA(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeights8(result.Bounds().Dy(), taps, blur, scaleY, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.RGBA)
+			go func() {
+				defer wg.Done()
+				resizeRGBA(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	case *image.NRGBA:
+		// 8-bit precision
+		temp := image.NewRGBA(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewRGBA(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeights8(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.RGBA)
+			go func() {
+				defer wg.Done()
+				resizeNRGBA(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeights8(result.Bounds().Dy(), taps, blur, scaleY, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.RGBA)
+			go func() {
+				defer wg.Done()
+				resizeRGBA(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+
+	case *image.YCbCr:
+		// 8-bit precision
+		// accessing the YCbCr arrays in a tight loop is slow.
+		// converting the image to ycc increases performance by 2x.
+		temp := newYCC(image.Rect(0, 0, input.Bounds().Dy(), int(width)), input.SubsampleRatio)
+		result := newYCC(image.Rect(0, 0, int(width), int(height)), image.YCbCrSubsampleRatio444)
+
+		coeffs, offset, filterLength := createWeights8(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
+		in := imageYCbCrToYCC(input)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*ycc)
+			go func() {
+				defer wg.Done()
+				resizeYCbCr(in, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		coeffs, offset, filterLength = createWeights8(result.Bounds().Dy(), taps, blur, scaleY, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*ycc)
+			go func() {
+				defer wg.Done()
+				resizeYCbCr(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result.YCbCr()
+	case *image.RGBA64:
+		// 16-bit precision
+		temp := image.NewRGBA64(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeights16(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				resizeRGBA64(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeights16(result.Bounds().Dy(), taps, blur, scaleY, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				resizeRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	case *image.NRGBA64:
+		// 16-bit precision
+		temp := image.NewRGBA64(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeights16(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				resizeNRGBA64(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeights16(result.Bounds().Dy(), taps, blur, scaleY, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				resizeRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	case *image.Gray:
+		// 8-bit precision
+		temp := image.NewGray(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewGray(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeights8(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.Gray)
+			go func() {
+				defer wg.Done()
+				resizeGray(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeights8(result.Bounds().Dy(), taps, blur, scaleY, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.Gray)
+			go func() {
+				defer wg.Done()
+				resizeGray(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	case *image.Gray16:
+		// 16-bit precision
+		temp := image.NewGray16(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewGray16(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeights16(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.Gray16)
+			go func() {
+				defer wg.Done()
+				resizeGray16(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeights16(result.Bounds().Dy(), taps, blur, scaleY, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.Gray16)
+			go func() {
+				defer wg.Done()
+				resizeGray16(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	default:
+		// 16-bit precision
+		temp := image.NewRGBA64(image.Rect(0, 0, img.Bounds().Dy(), int(width)))
+		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeights16(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				resizeGeneric(img, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeights16(result.Bounds().Dy(), taps, blur, scaleY, kernel)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				resizeRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	}
+}
+
+func resizeNearest(width, height uint, scaleX, scaleY float64, img image.Image, interp InterpolationFunction) image.Image {
+	taps, _ := interp.kernel()
+	cpus := runtime.GOMAXPROCS(0)
+	wg := sync.WaitGroup{}
+
+	switch input := img.(type) {
+	case *image.RGBA:
+		// 8-bit precision
+		temp := image.NewRGBA(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewRGBA(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.RGBA)
+			go func() {
+				defer wg.Done()
+				nearestRGBA(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.RGBA)
+			go func() {
+				defer wg.Done()
+				nearestRGBA(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	case *image.NRGBA:
+		// 8-bit precision
+		temp := image.NewNRGBA(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewNRGBA(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.NRGBA)
+			go func() {
+				defer wg.Done()
+				nearestNRGBA(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.NRGBA)
+			go func() {
+				defer wg.Done()
+				nearestNRGBA(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	case *image.YCbCr:
+		// 8-bit precision
+		// accessing the YCbCr arrays in a tight loop is slow.
+		// converting the image to ycc increases performance by 2x.
+		temp := newYCC(image.Rect(0, 0, input.Bounds().Dy(), int(width)), input.SubsampleRatio)
+		result := newYCC(image.Rect(0, 0, int(width), int(height)), image.YCbCrSubsampleRatio444)
+
+		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
+		in := imageYCbCrToYCC(input)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*ycc)
+			go func() {
+				defer wg.Done()
+				nearestYCbCr(in, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*ycc)
+			go func() {
+				defer wg.Done()
+				nearestYCbCr(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result.YCbCr()
+	case *image.RGBA64:
+		// 16-bit precision
+		temp := image.NewRGBA64(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				nearestRGBA64(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				nearestRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	case *image.NRGBA64:
+		// 16-bit precision
+		temp := image.NewNRGBA64(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewNRGBA64(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.NRGBA64)
+			go func() {
+				defer wg.Done()
+				nearestNRGBA64(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.NRGBA64)
+			go func() {
+				defer wg.Done()
+				nearestNRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	case *image.Gray:
+		// 8-bit precision
+		temp := image.NewGray(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewGray(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.Gray)
+			go func() {
+				defer wg.Done()
+				nearestGray(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.Gray)
+			go func() {
+				defer wg.Done()
+				nearestGray(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	case *image.Gray16:
+		// 16-bit precision
+		temp := image.NewGray16(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
+		result := image.NewGray16(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.Gray16)
+			go func() {
+				defer wg.Done()
+				nearestGray16(input, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.Gray16)
+			go func() {
+				defer wg.Done()
+				nearestGray16(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	default:
+		// 16-bit precision
+		temp := image.NewRGBA64(image.Rect(0, 0, img.Bounds().Dy(), int(width)))
+		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
+
+		// horizontal filter, results in transposed temporary image
+		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				nearestGeneric(img, slice, scaleX, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+
+		// horizontal filter on transposed image, result is not transposed
+		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
+		wg.Add(cpus)
+		for i := 0; i < cpus; i++ {
+			slice := makeSlice(result, i, cpus).(*image.RGBA64)
+			go func() {
+				defer wg.Done()
+				nearestRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
+			}()
+		}
+		wg.Wait()
+		return result
+	}
+
+}
+
+// Calculates scaling factors using old and new image dimensions.
+func calcFactors(width, height uint, oldWidth, oldHeight float64) (scaleX, scaleY float64) {
+	if width == 0 {
+		if height == 0 {
+			scaleX = 1.0
+			scaleY = 1.0
+		} else {
+			scaleY = oldHeight / float64(height)
+			scaleX = scaleY
+		}
+	} else {
+		scaleX = oldWidth / float64(width)
+		if height == 0 {
+			scaleY = scaleX
+		} else {
+			scaleY = oldHeight / float64(height)
+		}
+	}
+	return
+}
+
+type imageWithSubImage interface {
+	image.Image
+	SubImage(image.Rectangle) image.Image
+}
+
+func makeSlice(img imageWithSubImage, i, n int) image.Image {
+	return img.SubImage(image.Rect(img.Bounds().Min.X, img.Bounds().Min.Y+i*img.Bounds().Dy()/n, img.Bounds().Max.X, img.Bounds().Min.Y+(i+1)*img.Bounds().Dy()/n))
+}

vendor/github.com/nfnt/resize/resize_test.go

@@ -0,0 +1,330 @@
+package resize
+
+import (
+	"image"
+	"image/color"
+	"runtime"
+	"testing"
+)
+
+var img = image.NewGray16(image.Rect(0, 0, 3, 3))
+
+func init() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+	img.Set(1, 1, color.White)
+}
+
+func Test_Param1(t *testing.T) {
+	m := Resize(0, 0, img, NearestNeighbor)
+	if m.Bounds() != img.Bounds() {
+		t.Fail()
+	}
+}
+
+func Test_Param2(t *testing.T) {
+	m := Resize(100, 0, img, NearestNeighbor)
+	if m.Bounds() != image.Rect(0, 0, 100, 100) {
+		t.Fail()
+	}
+}
+
+func Test_ZeroImg(t *testing.T) {
+	zeroImg := image.NewGray16(image.Rect(0, 0, 0, 0))
+
+	m := Resize(0, 0, zeroImg, NearestNeighbor)
+	if m.Bounds() != zeroImg.Bounds() {
+		t.Fail()
+	}
+}
+
+func Test_CorrectResize(t *testing.T) {
+	zeroImg := image.NewGray16(image.Rect(0, 0, 256, 256))
+
+	m := Resize(60, 0, zeroImg, NearestNeighbor)
+	if m.Bounds() != image.Rect(0, 0, 60, 60) {
+		t.Fail()
+	}
+}
+
+func Test_SameColorWithRGBA(t *testing.T) {
+	img := image.NewRGBA(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetRGBA(x, y, color.RGBA{0x80, 0x80, 0x80, 0xFF})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.RGBA)
+			if color.R != 0x80 || color.G != 0x80 || color.B != 0x80 || color.A != 0xFF {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithNRGBA(t *testing.T) {
+	img := image.NewNRGBA(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetNRGBA(x, y, color.NRGBA{0x80, 0x80, 0x80, 0xFF})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.RGBA)
+			if color.R != 0x80 || color.G != 0x80 || color.B != 0x80 || color.A != 0xFF {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithRGBA64(t *testing.T) {
+	img := image.NewRGBA64(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetRGBA64(x, y, color.RGBA64{0x8000, 0x8000, 0x8000, 0xFFFF})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.RGBA64)
+			if color.R != 0x8000 || color.G != 0x8000 || color.B != 0x8000 || color.A != 0xFFFF {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithNRGBA64(t *testing.T) {
+	img := image.NewNRGBA64(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetNRGBA64(x, y, color.NRGBA64{0x8000, 0x8000, 0x8000, 0xFFFF})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.RGBA64)
+			if color.R != 0x8000 || color.G != 0x8000 || color.B != 0x8000 || color.A != 0xFFFF {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithGray(t *testing.T) {
+	img := image.NewGray(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetGray(x, y, color.Gray{0x80})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.Gray)
+			if color.Y != 0x80 {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithGray16(t *testing.T) {
+	img := image.NewGray16(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetGray16(x, y, color.Gray16{0x8000})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.Gray16)
+			if color.Y != 0x8000 {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_Bounds(t *testing.T) {
+	img := image.NewRGBA(image.Rect(20, 10, 200, 99))
+	out := Resize(80, 80, img, Lanczos2)
+	out.At(0, 0)
+}
+
+func Test_SameSizeReturnsOriginal(t *testing.T) {
+	img := image.NewRGBA(image.Rect(0, 0, 10, 10))
+	out := Resize(0, 0, img, Lanczos2)
+
+	if img != out {
+		t.Fail()
+	}
+
+	out = Resize(10, 10, img, Lanczos2)
+
+	if img != out {
+		t.Fail()
+	}
+}
+
+func Test_PixelCoordinates(t *testing.T) {
+	checkers := image.NewGray(image.Rect(0, 0, 4, 4))
+	checkers.Pix = []uint8{
+		255, 0, 255, 0,
+		0, 255, 0, 255,
+		255, 0, 255, 0,
+		0, 255, 0, 255,
+	}
+
+	resized := Resize(12, 12, checkers, NearestNeighbor).(*image.Gray)
+
+	if resized.Pix[0] != 255 || resized.Pix[1] != 255 || resized.Pix[2] != 255 {
+		t.Fail()
+	}
+
+	if resized.Pix[3] != 0 || resized.Pix[4] != 0 || resized.Pix[5] != 0 {
+		t.Fail()
+	}
+}
+
+func Test_ResizeWithPremultipliedAlpha(t *testing.T) {
+	img := image.NewRGBA(image.Rect(0, 0, 1, 4))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		// 0x80 = 0.5 * 0xFF.
+		img.SetRGBA(0, y, color.RGBA{0x80, 0x80, 0x80, 0x80})
+	}
+
+	out := Resize(1, 2, img, MitchellNetravali)
+
+	outputColor := out.At(0, 0).(color.RGBA)
+	if outputColor.R != 0x80 {
+		t.Fail()
+	}
+}
+
+func Test_ResizeWithTranslucentColor(t *testing.T) {
+	img := image.NewNRGBA(image.Rect(0, 0, 1, 2))
+
+	// Set the pixel colors to an "invisible green" and white.
+	// After resizing, the green shouldn't be visible.
+	img.SetNRGBA(0, 0, color.NRGBA{0x00, 0xFF, 0x00, 0x00})
+	img.SetNRGBA(0, 1, color.NRGBA{0x00, 0x00, 0x00, 0xFF})
+
+	out := Resize(1, 1, img, Bilinear)
+
+	_, g, _, _ := out.At(0, 0).RGBA()
+	if g != 0x00 {
+		t.Errorf("%+v", g)
+	}
+}
+
+const (
+	// Use a small image size for benchmarks. We don't want memory performance
+	// to affect the benchmark results.
+	benchMaxX = 250
+	benchMaxY = 250
+
+	// Resize values near the original size require increase the amount of time
+	// resize spends converting the image.
+	benchWidth  = 200
+	benchHeight = 200
+)
+
+func benchRGBA(b *testing.B, interp InterpolationFunction) {
+	m := image.NewRGBA(image.Rect(0, 0, benchMaxX, benchMaxY))
+	// Initialize m's pixels to create a non-uniform image.
+	for y := m.Rect.Min.Y; y < m.Rect.Max.Y; y++ {
+		for x := m.Rect.Min.X; x < m.Rect.Max.X; x++ {
+			i := m.PixOffset(x, y)
+			m.Pix[i+0] = uint8(y + 4*x)
+			m.Pix[i+1] = uint8(y + 4*x)
+			m.Pix[i+2] = uint8(y + 4*x)
+			m.Pix[i+3] = uint8(4*y + x)
+		}
+	}
+
+	var out image.Image
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		out = Resize(benchWidth, benchHeight, m, interp)
+	}
+	out.At(0, 0)
+}
+
+// The names of some interpolation functions are truncated so that the columns
+// of 'go test -bench' line up.
+func Benchmark_Nearest_RGBA(b *testing.B) {
+	benchRGBA(b, NearestNeighbor)
+}
+
+func Benchmark_Bilinear_RGBA(b *testing.B) {
+	benchRGBA(b, Bilinear)
+}
+
+func Benchmark_Bicubic_RGBA(b *testing.B) {
+	benchRGBA(b, Bicubic)
+}
+
+func Benchmark_Mitchell_RGBA(b *testing.B) {
+	benchRGBA(b, MitchellNetravali)
+}
+
+func Benchmark_Lanczos2_RGBA(b *testing.B) {
+	benchRGBA(b, Lanczos2)
+}
+
+func Benchmark_Lanczos3_RGBA(b *testing.B) {
+	benchRGBA(b, Lanczos3)
+}
+
+func benchYCbCr(b *testing.B, interp InterpolationFunction) {
+	m := image.NewYCbCr(image.Rect(0, 0, benchMaxX, benchMaxY), image.YCbCrSubsampleRatio422)
+	// Initialize m's pixels to create a non-uniform image.
+	for y := m.Rect.Min.Y; y < m.Rect.Max.Y; y++ {
+		for x := m.Rect.Min.X; x < m.Rect.Max.X; x++ {
+			yi := m.YOffset(x, y)
+			ci := m.COffset(x, y)
+			m.Y[yi] = uint8(16*y + x)
+			m.Cb[ci] = uint8(y + 16*x)
+			m.Cr[ci] = uint8(y + 16*x)
+		}
+	}
+	var out image.Image
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		out = Resize(benchWidth, benchHeight, m, interp)
+	}
+	out.At(0, 0)
+}
+
+func Benchmark_Nearest_YCC(b *testing.B) {
+	benchYCbCr(b, NearestNeighbor)
+}
+
+func Benchmark_Bilinear_YCC(b *testing.B) {
+	benchYCbCr(b, Bilinear)
+}
+
+func Benchmark_Bicubic_YCC(b *testing.B) {
+	benchYCbCr(b, Bicubic)
+}
+
+func Benchmark_Mitchell_YCC(b *testing.B) {
+	benchYCbCr(b, MitchellNetravali)
+}
+
+func Benchmark_Lanczos2_YCC(b *testing.B) {
+	benchYCbCr(b, Lanczos2)
+}
+
+func Benchmark_Lanczos3_YCC(b *testing.B) {
+	benchYCbCr(b, Lanczos3)
+}

vendor/github.com/nfnt/resize/thumbnail.go

@@ -0,0 +1,55 @@
+/*
+Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+*/
+
+package resize
+
+import (
+	"image"
+)
+
+// Thumbnail will downscale provided image to max width and height preserving
+// original aspect ratio and using the interpolation function interp.
+// It will return original image, without processing it, if original sizes
+// are already smaller than provided constraints.
+func Thumbnail(maxWidth, maxHeight uint, img image.Image, interp InterpolationFunction) image.Image {
+	origBounds := img.Bounds()
+	origWidth := uint(origBounds.Dx())
+	origHeight := uint(origBounds.Dy())
+	newWidth, newHeight := origWidth, origHeight
+
+	// Return original image if it have same or smaller size as constraints
+	if maxWidth >= origWidth && maxHeight >= origHeight {
+		return img
+	}
+
+	// Preserve aspect ratio
+	if origWidth > maxWidth {
+		newHeight = uint(origHeight * maxWidth / origWidth)
+		if newHeight < 1 {
+			newHeight = 1
+		}
+		newWidth = maxWidth
+	}
+
+	if newHeight > maxHeight {
+		newWidth = uint(newWidth * maxHeight / newHeight)
+		if newWidth < 1 {
+			newWidth = 1
+		}
+		newHeight = maxHeight
+	}
+	return Resize(newWidth, newHeight, img, interp)
+}

vendor/github.com/nfnt/resize/thumbnail_test.go

@@ -0,0 +1,47 @@
+package resize
+
+import (
+	"image"
+	"runtime"
+	"testing"
+)
+
+func init() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+}
+
+var thumbnailTests = []struct {
+	origWidth      int
+	origHeight     int
+	maxWidth       uint
+	maxHeight      uint
+	expectedWidth  uint
+	expectedHeight uint
+}{
+	{5, 5, 10, 10, 5, 5},
+	{10, 10, 5, 5, 5, 5},
+	{10, 50, 10, 10, 2, 10},
+	{50, 10, 10, 10, 10, 2},
+	{50, 100, 60, 90, 45, 90},
+	{120, 100, 60, 90, 60, 50},
+	{200, 250, 200, 150, 120, 150},
+}
+
+func TestThumbnail(t *testing.T) {
+	for i, tt := range thumbnailTests {
+		img := image.NewGray16(image.Rect(0, 0, tt.origWidth, tt.origHeight))
+
+		outImg := Thumbnail(tt.maxWidth, tt.maxHeight, img, NearestNeighbor)
+
+		newWidth := uint(outImg.Bounds().Dx())
+		newHeight := uint(outImg.Bounds().Dy())
+		if newWidth != tt.expectedWidth ||
+			newHeight != tt.expectedHeight {
+			t.Errorf("%d. Thumbnail(%v, %v, img, NearestNeighbor) => "+
+				"width: %v, height: %v, want width: %v, height: %v",
+				i, tt.maxWidth, tt.maxHeight,
+				newWidth, newHeight, tt.expectedWidth, tt.expectedHeight,
+			)
+		}
+	}
+}

vendor/github.com/nfnt/resize/ycc.go

@@ -0,0 +1,227 @@
+/*
+Copyright (c) 2014, Charlie Vieth <charlie.vieth@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+*/
+
+package resize
+
+import (
+	"image"
+	"image/color"
+)
+
+// ycc is an in memory YCbCr image.  The Y, Cb and Cr samples are held in a
+// single slice to increase resizing performance.
+type ycc struct {
+	// Pix holds the image's pixels, in Y, Cb, Cr order. The pixel at
+	// (x, y) starts at Pix[(y-Rect.Min.Y)*Stride + (x-Rect.Min.X)*3].
+	Pix []uint8
+	// Stride is the Pix stride (in bytes) between vertically adjacent pixels.
+	Stride int
+	// Rect is the image's bounds.
+	Rect image.Rectangle
+	// SubsampleRatio is the subsample ratio of the original YCbCr image.
+	SubsampleRatio image.YCbCrSubsampleRatio
+}
+
+// PixOffset returns the index of the first element of Pix that corresponds to
+// the pixel at (x, y).
+func (p *ycc) PixOffset(x, y int) int {
+	return (y-p.Rect.Min.Y)*p.Stride + (x-p.Rect.Min.X)*3
+}
+
+func (p *ycc) Bounds() image.Rectangle {
+	return p.Rect
+}
+
+func (p *ycc) ColorModel() color.Model {
+	return color.YCbCrModel
+}
+
+func (p *ycc) At(x, y int) color.Color {
+	if !(image.Point{x, y}.In(p.Rect)) {
+		return color.YCbCr{}
+	}
+	i := p.PixOffset(x, y)
+	return color.YCbCr{
+		p.Pix[i+0],
+		p.Pix[i+1],
+		p.Pix[i+2],
+	}
+}
+
+func (p *ycc) Opaque() bool {
+	return true
+}
+
+// SubImage returns an image representing the portion of the image p visible
+// through r. The returned value shares pixels with the original image.
+func (p *ycc) SubImage(r image.Rectangle) image.Image {
+	r = r.Intersect(p.Rect)
+	if r.Empty() {
+		return &ycc{SubsampleRatio: p.SubsampleRatio}
+	}
+	i := p.PixOffset(r.Min.X, r.Min.Y)
+	return &ycc{
+		Pix:            p.Pix[i:],
+		Stride:         p.Stride,
+		Rect:           r,
+		SubsampleRatio: p.SubsampleRatio,
+	}
+}
+
+// newYCC returns a new ycc with the given bounds and subsample ratio.
+func newYCC(r image.Rectangle, s image.YCbCrSubsampleRatio) *ycc {
+	w, h := r.Dx(), r.Dy()
+	buf := make([]uint8, 3*w*h)
+	return &ycc{Pix: buf, Stride: 3 * w, Rect: r, SubsampleRatio: s}
+}
+
+// YCbCr converts ycc to a YCbCr image with the same subsample ratio
+// as the YCbCr image that ycc was generated from.
+func (p *ycc) YCbCr() *image.YCbCr {
+	ycbcr := image.NewYCbCr(p.Rect, p.SubsampleRatio)
+	var off int
+
+	switch ycbcr.SubsampleRatio {
+	case image.YCbCrSubsampleRatio422:
+		for y := ycbcr.Rect.Min.Y; y < ycbcr.Rect.Max.Y; y++ {
+			yy := (y - ycbcr.Rect.Min.Y) * ycbcr.YStride
+			cy := (y - ycbcr.Rect.Min.Y) * ycbcr.CStride
+			for x := ycbcr.Rect.Min.X; x < ycbcr.Rect.Max.X; x++ {
+				xx := (x - ycbcr.Rect.Min.X)
+				yi := yy + xx
+				ci := cy + xx/2
+				ycbcr.Y[yi] = p.Pix[off+0]
+				ycbcr.Cb[ci] = p.Pix[off+1]
+				ycbcr.Cr[ci] = p.Pix[off+2]
+				off += 3
+			}
+		}
+	case image.YCbCrSubsampleRatio420:
+		for y := ycbcr.Rect.Min.Y; y < ycbcr.Rect.Max.Y; y++ {
+			yy := (y - ycbcr.Rect.Min.Y) * ycbcr.YStride
+			cy := (y/2 - ycbcr.Rect.Min.Y/2) * ycbcr.CStride
+			for x := ycbcr.Rect.Min.X; x < ycbcr.Rect.Max.X; x++ {
+				xx := (x - ycbcr.Rect.Min.X)
+				yi := yy + xx
+				ci := cy + xx/2
+				ycbcr.Y[yi] = p.Pix[off+0]
+				ycbcr.Cb[ci] = p.Pix[off+1]
+				ycbcr.Cr[ci] = p.Pix[off+2]
+				off += 3
+			}
+		}
+	case image.YCbCrSubsampleRatio440:
+		for y := ycbcr.Rect.Min.Y; y < ycbcr.Rect.Max.Y; y++ {
+			yy := (y - ycbcr.Rect.Min.Y) * ycbcr.YStride
+			cy := (y/2 - ycbcr.Rect.Min.Y/2) * ycbcr.CStride
+			for x := ycbcr.Rect.Min.X; x < ycbcr.Rect.Max.X; x++ {
+				xx := (x - ycbcr.Rect.Min.X)
+				yi := yy + xx
+				ci := cy + xx
+				ycbcr.Y[yi] = p.Pix[off+0]
+				ycbcr.Cb[ci] = p.Pix[off+1]
+				ycbcr.Cr[ci] = p.Pix[off+2]
+				off += 3
+			}
+		}
+	default:
+		// Default to 4:4:4 subsampling.
+		for y := ycbcr.Rect.Min.Y; y < ycbcr.Rect.Max.Y; y++ {
+			yy := (y - ycbcr.Rect.Min.Y) * ycbcr.YStride
+			cy := (y - ycbcr.Rect.Min.Y) * ycbcr.CStride
+			for x := ycbcr.Rect.Min.X; x < ycbcr.Rect.Max.X; x++ {
+				xx := (x - ycbcr.Rect.Min.X)
+				yi := yy + xx
+				ci := cy + xx
+				ycbcr.Y[yi] = p.Pix[off+0]
+				ycbcr.Cb[ci] = p.Pix[off+1]
+				ycbcr.Cr[ci] = p.Pix[off+2]
+				off += 3
+			}
+		}
+	}
+	return ycbcr
+}
+
+// imageYCbCrToYCC converts a YCbCr image to a ycc image for resizing.
+func imageYCbCrToYCC(in *image.YCbCr) *ycc {
+	w, h := in.Rect.Dx(), in.Rect.Dy()
+	r := image.Rect(0, 0, w, h)
+	buf := make([]uint8, 3*w*h)
+	p := ycc{Pix: buf, Stride: 3 * w, Rect: r, SubsampleRatio: in.SubsampleRatio}
+	var off int
+
+	switch in.SubsampleRatio {
+	case image.YCbCrSubsampleRatio422:
+		for y := in.Rect.Min.Y; y < in.Rect.Max.Y; y++ {
+			yy := (y - in.Rect.Min.Y) * in.YStride
+			cy := (y - in.Rect.Min.Y) * in.CStride
+			for x := in.Rect.Min.X; x < in.Rect.Max.X; x++ {
+				xx := (x - in.Rect.Min.X)
+				yi := yy + xx
+				ci := cy + xx/2
+				p.Pix[off+0] = in.Y[yi]
+				p.Pix[off+1] = in.Cb[ci]
+				p.Pix[off+2] = in.Cr[ci]
+				off += 3
+			}
+		}
+	case image.YCbCrSubsampleRatio420:
+		for y := in.Rect.Min.Y; y < in.Rect.Max.Y; y++ {
+			yy := (y - in.Rect.Min.Y) * in.YStride
+			cy := (y/2 - in.Rect.Min.Y/2) * in.CStride
+			for x := in.Rect.Min.X; x < in.Rect.Max.X; x++ {
+				xx := (x - in.Rect.Min.X)
+				yi := yy + xx
+				ci := cy + xx/2
+				p.Pix[off+0] = in.Y[yi]
+				p.Pix[off+1] = in.Cb[ci]
+				p.Pix[off+2] = in.Cr[ci]
+				off += 3
+			}
+		}
+	case image.YCbCrSubsampleRatio440:
+		for y := in.Rect.Min.Y; y < in.Rect.Max.Y; y++ {
+			yy := (y - in.Rect.Min.Y) * in.YStride
+			cy := (y/2 - in.Rect.Min.Y/2) * in.CStride
+			for x := in.Rect.Min.X; x < in.Rect.Max.X; x++ {
+				xx := (x - in.Rect.Min.X)
+				yi := yy + xx
+				ci := cy + xx
+				p.Pix[off+0] = in.Y[yi]
+				p.Pix[off+1] = in.Cb[ci]
+				p.Pix[off+2] = in.Cr[ci]
+				off += 3
+			}
+		}
+	default:
+		// Default to 4:4:4 subsampling.
+		for y := in.Rect.Min.Y; y < in.Rect.Max.Y; y++ {
+			yy := (y - in.Rect.Min.Y) * in.YStride
+			cy := (y - in.Rect.Min.Y) * in.CStride
+			for x := in.Rect.Min.X; x < in.Rect.Max.X; x++ {
+				xx := (x - in.Rect.Min.X)
+				yi := yy + xx
+				ci := cy + xx
+				p.Pix[off+0] = in.Y[yi]
+				p.Pix[off+1] = in.Cb[ci]
+				p.Pix[off+2] = in.Cr[ci]
+				off += 3
+			}
+		}
+	}
+	return &p
+}

vendor/github.com/nfnt/resize/ycc_test.go

@@ -0,0 +1,214 @@
+/*
+Copyright (c) 2014, Charlie Vieth <charlie.vieth@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+*/
+
+package resize
+
+import (
+	"image"
+	"image/color"
+	"testing"
+)
+
+type Image interface {
+	image.Image
+	SubImage(image.Rectangle) image.Image
+}
+
+func TestImage(t *testing.T) {
+	testImage := []Image{
+		newYCC(image.Rect(0, 0, 10, 10), image.YCbCrSubsampleRatio420),
+		newYCC(image.Rect(0, 0, 10, 10), image.YCbCrSubsampleRatio422),
+		newYCC(image.Rect(0, 0, 10, 10), image.YCbCrSubsampleRatio440),
+		newYCC(image.Rect(0, 0, 10, 10), image.YCbCrSubsampleRatio444),
+	}
+	for _, m := range testImage {
+		if !image.Rect(0, 0, 10, 10).Eq(m.Bounds()) {
+			t.Errorf("%T: want bounds %v, got %v",
+				m, image.Rect(0, 0, 10, 10), m.Bounds())
+			continue
+		}
+		m = m.SubImage(image.Rect(3, 2, 9, 8)).(Image)
+		if !image.Rect(3, 2, 9, 8).Eq(m.Bounds()) {
+			t.Errorf("%T: sub-image want bounds %v, got %v",
+				m, image.Rect(3, 2, 9, 8), m.Bounds())
+			continue
+		}
+		// Test that taking an empty sub-image starting at a corner does not panic.
+		m.SubImage(image.Rect(0, 0, 0, 0))
+		m.SubImage(image.Rect(10, 0, 10, 0))
+		m.SubImage(image.Rect(0, 10, 0, 10))
+		m.SubImage(image.Rect(10, 10, 10, 10))
+	}
+}
+
+func TestConvertYCbCr(t *testing.T) {
+	testImage := []Image{
+		image.NewYCbCr(image.Rect(0, 0, 50, 50), image.YCbCrSubsampleRatio420),
+		image.NewYCbCr(image.Rect(0, 0, 50, 50), image.YCbCrSubsampleRatio422),
+		image.NewYCbCr(image.Rect(0, 0, 50, 50), image.YCbCrSubsampleRatio440),
+		image.NewYCbCr(image.Rect(0, 0, 50, 50), image.YCbCrSubsampleRatio444),
+	}
+
+	for _, img := range testImage {
+		m := img.(*image.YCbCr)
+		for y := m.Rect.Min.Y; y < m.Rect.Max.Y; y++ {
+			for x := m.Rect.Min.X; x < m.Rect.Max.X; x++ {
+				yi := m.YOffset(x, y)
+				ci := m.COffset(x, y)
+				m.Y[yi] = uint8(16*y + x)
+				m.Cb[ci] = uint8(y + 16*x)
+				m.Cr[ci] = uint8(y + 16*x)
+			}
+		}
+
+		// test conversion from YCbCr to ycc
+		yc := imageYCbCrToYCC(m)
+		for y := m.Rect.Min.Y; y < m.Rect.Max.Y; y++ {
+			for x := m.Rect.Min.X; x < m.Rect.Max.X; x++ {
+				ystride := 3 * (m.Rect.Max.X - m.Rect.Min.X)
+				xstride := 3
+				yi := m.YOffset(x, y)
+				ci := m.COffset(x, y)
+				si := (y * ystride) + (x * xstride)
+				if m.Y[yi] != yc.Pix[si] {
+					t.Errorf("Err Y - found: %d expected: %d x: %d y: %d yi: %d si: %d",
+						m.Y[yi], yc.Pix[si], x, y, yi, si)
+				}
+				if m.Cb[ci] != yc.Pix[si+1] {
+					t.Errorf("Err Cb - found: %d expected: %d x: %d y: %d ci: %d si: %d",
+						m.Cb[ci], yc.Pix[si+1], x, y, ci, si+1)
+				}
+				if m.Cr[ci] != yc.Pix[si+2] {
+					t.Errorf("Err Cr - found: %d expected: %d x: %d y: %d ci: %d si: %d",
+						m.Cr[ci], yc.Pix[si+2], x, y, ci, si+2)
+				}
+			}
+		}
+
+		// test conversion from ycc back to YCbCr
+		ym := yc.YCbCr()
+		for y := m.Rect.Min.Y; y < m.Rect.Max.Y; y++ {
+			for x := m.Rect.Min.X; x < m.Rect.Max.X; x++ {
+				yi := m.YOffset(x, y)
+				ci := m.COffset(x, y)
+				if m.Y[yi] != ym.Y[yi] {
+					t.Errorf("Err Y - found: %d expected: %d x: %d y: %d yi: %d",
+						m.Y[yi], ym.Y[yi], x, y, yi)
+				}
+				if m.Cb[ci] != ym.Cb[ci] {
+					t.Errorf("Err Cb - found: %d expected: %d x: %d y: %d ci: %d",
+						m.Cb[ci], ym.Cb[ci], x, y, ci)
+				}
+				if m.Cr[ci] != ym.Cr[ci] {
+					t.Errorf("Err Cr - found: %d expected: %d x: %d y: %d ci: %d",
+						m.Cr[ci], ym.Cr[ci], x, y, ci)
+				}
+			}
+		}
+	}
+}
+
+func TestYCbCr(t *testing.T) {
+	rects := []image.Rectangle{
+		image.Rect(0, 0, 16, 16),
+		image.Rect(1, 0, 16, 16),
+		image.Rect(0, 1, 16, 16),
+		image.Rect(1, 1, 16, 16),
+		image.Rect(1, 1, 15, 16),
+		image.Rect(1, 1, 16, 15),
+		image.Rect(1, 1, 15, 15),
+		image.Rect(2, 3, 14, 15),
+		image.Rect(7, 0, 7, 16),
+		image.Rect(0, 8, 16, 8),
+		image.Rect(0, 0, 10, 11),
+		image.Rect(5, 6, 16, 16),
+		image.Rect(7, 7, 8, 8),
+		image.Rect(7, 8, 8, 9),
+		image.Rect(8, 7, 9, 8),
+		image.Rect(8, 8, 9, 9),
+		image.Rect(7, 7, 17, 17),
+		image.Rect(8, 8, 17, 17),
+		image.Rect(9, 9, 17, 17),
+		image.Rect(10, 10, 17, 17),
+	}
+	subsampleRatios := []image.YCbCrSubsampleRatio{
+		image.YCbCrSubsampleRatio444,
+		image.YCbCrSubsampleRatio422,
+		image.YCbCrSubsampleRatio420,
+		image.YCbCrSubsampleRatio440,
+	}
+	deltas := []image.Point{
+		image.Pt(0, 0),
+		image.Pt(1000, 1001),
+		image.Pt(5001, -400),
+		image.Pt(-701, -801),
+	}
+	for _, r := range rects {
+		for _, subsampleRatio := range subsampleRatios {
+			for _, delta := range deltas {
+				testYCbCr(t, r, subsampleRatio, delta)
+			}
+		}
+		if testing.Short() {
+			break
+		}
+	}
+}
+
+func testYCbCr(t *testing.T, r image.Rectangle, subsampleRatio image.YCbCrSubsampleRatio, delta image.Point) {
+	// Create a YCbCr image m, whose bounds are r translated by (delta.X, delta.Y).
+	r1 := r.Add(delta)
+	img := image.NewYCbCr(r1, subsampleRatio)
+
+	// Initialize img's pixels. For 422 and 420 subsampling, some of the Cb and Cr elements
+	// will be set multiple times. That's OK. We just want to avoid a uniform image.
+	for y := r1.Min.Y; y < r1.Max.Y; y++ {
+		for x := r1.Min.X; x < r1.Max.X; x++ {
+			yi := img.YOffset(x, y)
+			ci := img.COffset(x, y)
+			img.Y[yi] = uint8(16*y + x)
+			img.Cb[ci] = uint8(y + 16*x)
+			img.Cr[ci] = uint8(y + 16*x)
+		}
+	}
+
+	m := imageYCbCrToYCC(img)
+
+	// Make various sub-images of m.
+	for y0 := delta.Y + 3; y0 < delta.Y+7; y0++ {
+		for y1 := delta.Y + 8; y1 < delta.Y+13; y1++ {
+			for x0 := delta.X + 3; x0 < delta.X+7; x0++ {
+				for x1 := delta.X + 8; x1 < delta.X+13; x1++ {
+					subRect := image.Rect(x0, y0, x1, y1)
+					sub := m.SubImage(subRect).(*ycc)
+
+					// For each point in the sub-image's bounds, check that m.At(x, y) equals sub.At(x, y).
+					for y := sub.Rect.Min.Y; y < sub.Rect.Max.Y; y++ {
+						for x := sub.Rect.Min.X; x < sub.Rect.Max.X; x++ {
+							color0 := m.At(x, y).(color.YCbCr)
+							color1 := sub.At(x, y).(color.YCbCr)
+							if color0 != color1 {
+								t.Errorf("r=%v, subsampleRatio=%v, delta=%v, x=%d, y=%d, color0=%v, color1=%v",
+									r, subsampleRatio, delta, x, y, color0, color1)
+								return
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}

vendor/github.com/nyarla/go-crypt/.travis.yml

@@ -0,0 +1,7 @@
+language: go
+
+go:
+  - 1.1
+  - 1.2
+  - 1.3
+  - tip

vendor/github.com/nyarla/go-crypt/LICENSE

@@ -0,0 +1,14 @@
+Copyright (c) 2009, <iiasija>
+Copyright (c) 2013-2014 Naoki OKAMURA (Nyarla) <nyarla@thotep.net>
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/nyarla/go-crypt/README.md

@@ -0,0 +1,42 @@
+crypt
+=====
+
+A golang implementation of crypt(3).
+
+
+[![Build Status](https://travis-ci.org/nyarla/go-crypt.svg?branch=master)](https://travis-ci.org/nyarla/go-crypt) [![GoDoc](http://godoc.org/github.com/nyarla/go-crypt?status.svg)](https://godoc.org/github.com/nyarla/go-crypt)
+
+EXAMPLES CODE
+-------------
+
+```go
+import (
+    "fmt"
+
+    "github.com/nyarlabo/go-crypt"
+)
+
+func main() {
+    fmt.Println(crypt.Crypt("testtest", "es")); // esDRYJnY4VaGM
+}
+```
+
+WHY I FROKED IT?
+----------------
+
+Original implementation is writte by iasija at 2009-12-08,
+and original implementation is not supported golang 1.1 or later.
+
+So I fork it for fix this issue, and I added documenation and test code.
+
+Original implementation is hosting on [code.google.com/p/go-crypt](https://code.google.com/p/go-crypt),
+and that source code is under the 3-Clause BSD.
+
+NOTE: I could't find to iasija's contact address.
+
+COPYRIGTS AND LICENSE
+---------------------
+
+  1. Original Implementation: Copyright (c) 2009 iasija All Rights Reserved. ([BSD-3-Clause](http://opensource.org/licenses/BSD-3-Clause))
+  2. Modification Codes: Copyright (c) 22013-2015 Naoki OKAMURA a.k.a nyarla <nyarla@thotep.net> Some Rights Reserved. ([BSD-3-Clause](http://opensource.org/licenses/BSD-3-Clause))
+

vendor/github.com/nyarla/go-crypt/crypt.go

@@ -0,0 +1,276 @@
+package crypt
+
+import (
+	"bytes"
+)
+
+var PC1_C = []byte{
+	57, 49, 41, 33, 25, 17, 9,
+	1, 58, 50, 42, 34, 26, 18,
+	10, 2, 59, 51, 43, 35, 27,
+	19, 11, 3, 60, 52, 44, 36,
+}
+
+var PC1_D = []byte{
+	63, 55, 47, 39, 31, 23, 15,
+	7, 62, 54, 46, 38, 30, 22,
+	14, 6, 61, 53, 45, 37, 29,
+	21, 13, 5, 28, 20, 12, 4,
+}
+
+var PC2_C = []byte{
+	14, 17, 11, 24, 1, 5,
+	3, 28, 15, 6, 21, 10,
+	23, 19, 12, 4, 26, 8,
+	16, 7, 27, 20, 13, 2,
+}
+var PC2_D = []byte{
+	41, 52, 31, 37, 47, 55,
+	30, 40, 51, 45, 33, 48,
+	44, 49, 39, 56, 34, 53,
+	46, 42, 50, 36, 29, 32,
+}
+
+var e2 = []byte{
+	32, 1, 2, 3, 4, 5,
+	4, 5, 6, 7, 8, 9,
+	8, 9, 10, 11, 12, 13,
+	12, 13, 14, 15, 16, 17,
+	16, 17, 18, 19, 20, 21,
+	20, 21, 22, 23, 24, 25,
+	24, 25, 26, 27, 28, 29,
+	28, 29, 30, 31, 32, 1,
+}
+
+var IP = []byte{
+	58, 50, 42, 34, 26, 18, 10, 2,
+	60, 52, 44, 36, 28, 20, 12, 4,
+	62, 54, 46, 38, 30, 22, 14, 6,
+	64, 56, 48, 40, 32, 24, 16, 8,
+	57, 49, 41, 33, 25, 17, 9, 1,
+	59, 51, 43, 35, 27, 19, 11, 3,
+	61, 53, 45, 37, 29, 21, 13, 5,
+	63, 55, 47, 39, 31, 23, 15, 7,
+}
+
+var FP = []byte{
+	40, 8, 48, 16, 56, 24, 64, 32,
+	39, 7, 47, 15, 55, 23, 63, 31,
+	38, 6, 46, 14, 54, 22, 62, 30,
+	37, 5, 45, 13, 53, 21, 61, 29,
+	36, 4, 44, 12, 52, 20, 60, 28,
+	35, 3, 43, 11, 51, 19, 59, 27,
+	34, 2, 42, 10, 50, 18, 58, 26,
+	33, 1, 41, 9, 49, 17, 57, 25,
+}
+
+var S = [][]byte{
+	[]byte{14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
+		0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
+		4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
+		15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13},
+	[]byte{15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
+		3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
+		0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
+		13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9},
+	[]byte{10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
+		13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
+		13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
+		1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12},
+	[]byte{7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
+		13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
+		10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
+		3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14},
+	[]byte{2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
+		14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
+		4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
+		11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3},
+	[]byte{12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
+		10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
+		9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
+		4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13},
+	[]byte{4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
+		13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
+		1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
+		6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12},
+	[]byte{13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
+		1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
+		7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
+		2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11},
+}
+
+var P = []byte{
+	16, 7, 20, 21, 29, 12, 28, 17,
+	1, 15, 23, 26, 5, 18, 31, 10,
+	2, 8, 24, 14, 32, 27, 3, 9,
+	19, 13, 30, 6, 22, 11, 4, 25,
+}
+
+var shift = []int{1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1}
+
+// Crypt is a implementation of crypt(3) like as perl or ruby and ...etc.
+//
+// Behavior of this func is  same as perl-5.18.2's crypt on OSX Yosemite.
+func Crypt(pw string, salt string) string {
+	if sLen := len(salt); sLen < 2 {
+		src := []byte(salt)
+		for len(src) < 2 {
+			src = append(src, 0x00)
+		}
+		salt = string(src)
+	}
+
+	block := make([]byte, 66)
+
+	for i := 0; i < 8 && i < len(pw); i++ {
+		for j := 0; j < 7; j++ {
+			block[(8*i)+j] = (pw[i] >> byte(6-j)) & 1
+		}
+	}
+
+	C := make([]byte, 28)
+	D := make([]byte, 28)
+
+	for i := 0; i < 28; i++ {
+		C[i] = block[PC1_C[i]-1]
+		D[i] = block[PC1_D[i]-1]
+	}
+
+	KS := make([][]byte, 16)
+	for i := 0; i < 16; i++ {
+		KS[i] = make([]byte, 48)
+	}
+
+	for i := 0; i < 16; i++ {
+		for k := 0; k < shift[i]; k++ {
+			t := C[0]
+			for j := 0; j < 28-1; j++ {
+				C[j] = C[j+1]
+			}
+			C[27] = t
+			t = D[0]
+			for j := 0; j < 28-1; j++ {
+				D[j] = D[j+1]
+			}
+			D[27] = t
+		}
+		for j := 0; j < 24; j++ {
+			KS[i][j] = C[PC2_C[j]-1]
+			KS[i][j+24] = D[PC2_D[j]-28-1]
+		}
+	}
+
+	E := make([]byte, 48)
+	for i := 0; i < 48; i++ {
+		E[i] = e2[i]
+	}
+
+	iobuf := make([]byte, 16)
+	for i := 0; i < 2; i++ {
+		c := byte(salt[i])
+		iobuf[i] = c
+
+		if c > 'Z' {
+			c -= 6
+		}
+		if c > '9' {
+			c -= 7
+		}
+
+		c -= '.'
+
+		for j := 0; j < 6; j++ {
+			if (c>>byte(j))&1 != 0 {
+				k := E[6*i+j]
+				E[6*i+j] = E[6*i+j+24]
+				E[6*i+j+24] = k
+			}
+		}
+	}
+
+	for i := 0; i < 66; i++ {
+		block[i] = 0
+	}
+
+	R := make([]byte, 32)
+	L := make([]byte, 32)
+	DMY := make([]byte, 32)
+	preS := make([]byte, 48)
+	f := make([]byte, 32)
+	dmy_block := make([]byte, 64)
+
+	for m := 0; m < 25; m++ {
+		for i := 0; i < 32; i++ {
+			L[i] = block[IP[i]-1]
+		}
+		for i := 32; i < 64; i++ {
+			R[i-32] = block[IP[i]-1]
+		}
+
+		for i := 0; i < 16; i++ {
+			for j := 0; j < 32; j++ {
+				DMY[j] = R[j]
+			}
+			for j := 0; j < 48; j++ {
+				preS[j] = R[E[j]-1] ^ KS[i][j]
+			}
+			for j := 0; j < 8; j++ {
+				t := 6 * j
+				k := S[j][(preS[t+0]<<5)+
+					(preS[t+1]<<3)+
+					(preS[t+2]<<2)+
+					(preS[t+3]<<1)+
+					(preS[t+4]<<0)+
+					(preS[t+5]<<4)]
+
+				t = 4 * j
+				f[t+0] = (k >> 3) & 01
+				f[t+1] = (k >> 2) & 01
+				f[t+2] = (k >> 1) & 01
+				f[t+3] = (k >> 0) & 01
+			}
+			for j := 0; j < 32; j++ {
+				R[j] = L[j] ^ f[P[j]-1]
+			}
+			for j := 0; j < 32; j++ {
+				L[j] = DMY[j]
+			}
+		}
+
+		for i := 0; i < 32; i++ {
+			L[i], R[i] = R[i], L[i]
+		}
+
+		for i := 0; i < 32; i++ {
+			dmy_block[i] = L[i]
+		}
+		for i := 32; i < 64; i++ {
+			dmy_block[i] = R[i-32]
+		}
+		for i := 0; i < 64; i++ {
+			block[i] = dmy_block[FP[i]-1]
+		}
+	}
+	var i int
+	for i = 0; i < 11; i++ {
+		c := byte(0)
+		for j := 0; j < 6; j++ {
+			c = c << 1
+			c = c | block[6*i+j]
+		}
+		c = c + '.'
+
+		if c > '9' {
+			c += 7
+		}
+		if c > 'Z' {
+			c += 6
+		}
+
+		iobuf[i+2] = c
+	}
+
+	iobuf[i+2] = 0
+
+	return string(bytes.Replace(iobuf, []byte{0x00}, []byte{}, -1))
+}

vendor/github.com/nyarla/go-crypt/crypt_test.go

@@ -0,0 +1,18 @@
+package crypt
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestCrypt(t *testing.T) {
+	if ret := Crypt("testtest", "es"); ret != `esDRYJnY4VaGM` {
+		t.Fatal(fmt.Sprintf(`result of Crypt is musmatch: %+v`, []byte(ret)))
+	}
+}
+
+func ExampleCrypt() {
+	fmt.Println(Crypt("testtest", "es"))
+	// Output:
+	// esDRYJnY4VaGM
+}

vendor/github.com/nyarla/go-crypt/doc.go

@@ -0,0 +1,11 @@
+// Package crypt is a implementation of crypt(3) by golang.
+//
+// This is a fork of iasija's orignal implementation.
+//
+// Orignal soruce code Copyrights (C) iasija All rights reserved,
+// and original source code is under the 3-Clause BSD.
+//
+// Modification codes for supporting latest golang and added test codes are
+// Copyright (c) 2013-2014 Naoki OKAMURA <nyarla@thotep.net>,
+// and modifiration code and test codes are under same as the orignal source code license. (3-Clause BSD)
+package crypt

version.go

@@ -4,17 +4,12 @@ import (
 	"io"
 )
 
-const VERSION = 0.3
+var ApiVersionRouting = map[string]struct{AuthFunction; DispatchFunction}{
-
-var ApiVersionRouting = map[string]struct {
-	AuthFunction
-	DispatchFunction
-}{
 	"GET": {PublicPage, showVersion},
 }
 
 func showVersion(u *User, args []string, body io.ReadCloser) (interface{}, error) {
-	m := map[string]interface{}{"version": VERSION}
+	m := map[string]interface{}{"version": 0.1}
 
 	if u != nil {
 		m["youare"] = *u