file

Documentation

Index

• func ContainsTransparent(img image.Image) bool
• func GetFileContentType(buffer []byte) string
• func GetImageType(buffer []byte) string
• func PngToJpeg(img image.Image, jpegF io.Writer, quality int) error
• type File
  • func (f *File) CompressImage(imageType string) error
  • func (f *File) GetUploadFile(file *multipart.FileHeader) (filename string, err error)
  • func (f *File) SaveUploadedFile(file *multipart.FileHeader, filename string) (path string, err error)

Functions

func ContainsTransparent

func ContainsTransparent(img image.Image) bool

judge png contains transparent

func GetFileContentType

func GetFileContentType(buffer []byte) string

file byte data[:512] image type: "image/jpeg","image/png"

func GetImageType

func GetImageType(buffer []byte) string

jpeg,png

func PngToJpeg

func PngToJpeg(img image.Image, jpegF io.Writer, quality int) error

png to jpeg quality: -1 noting

Types

type File

type File struct {
	// file name
	Name string
	// path
	Path    string
	NewPath string
	// img attributes
	Width  int
	Height int

	// format 2006-01-02 15:04:05
	Format string

	IsComp  int8 // is img compress
	Quality int  // default 80, 1-100
}

file

func (*File) CompressImage

func (f *File) CompressImage(imageType string) error

图片压缩

func (*File) GetUploadFile

func (f *File) GetUploadFile(file *multipart.FileHeader) (filename string, err error)

获得文件上传路径

func (*File) SaveUploadedFile

func (f *File) SaveUploadedFile(file *multipart.FileHeader, filename string) (path string, err error)

save file