imagemeta

Documentation

Index

• Variables
• func BestIcoPage(r io.Reader) (int, int, error)
• func RegisterFormat(magic string, decodeMeta DecodeMetaFunc)
• type BmpFormatError
  • func (e BmpFormatError) Error() string
• type DecodeMetaFunc
• type IcoMeta
  • func DecodeIcoMeta(r io.Reader) (*IcoMeta, error)
  • func (m *IcoMeta) BestImageOffset() int
  • func (m *IcoMeta) BestImageSize() int
• type JpegFormatError
  • func (e JpegFormatError) Error() string
• type Meta
  • func DecodeBmpMeta(r io.Reader) (Meta, error)
  • func DecodeGifMeta(r io.Reader) (Meta, error)
  • func DecodeHeicMeta(r io.Reader) (Meta, error)
  • func DecodeJpegMeta(rr io.Reader) (Meta, error)
  • func DecodeMeta(r io.Reader) (Meta, error)
  • func DecodePngMeta(r io.Reader) (Meta, error)
  • func DecodeTiffMeta(rr io.Reader) (Meta, error)
  • func DecodeWebpMeta(r io.Reader) (Meta, error)
• type PngFormatError
  • func (e PngFormatError) Error() string
• type TiffFormatError
  • func (e TiffFormatError) Error() string

Variables

var (
	ErrFormat = errors.New("unknown image format")
)

var ErrWebpInvalidFormat = errors.New("webp: invalid format")

Functions

func BestIcoPage

func BestIcoPage(r io.Reader) (int, int, error)

func RegisterFormat

func RegisterFormat(magic string, decodeMeta DecodeMetaFunc)

Types

type BmpFormatError

type BmpFormatError string

func (BmpFormatError) Error

func (e BmpFormatError) Error() string

type DecodeMetaFunc

type DecodeMetaFunc func(io.Reader) (Meta, error)

type IcoMeta

type IcoMeta struct {
	Meta
	// contains filtered or unexported fields
}

func DecodeIcoMeta

func DecodeIcoMeta(r io.Reader) (*IcoMeta, error)

func (*IcoMeta) BestImageOffset

func (m *IcoMeta) BestImageOffset() int

func (*IcoMeta) BestImageSize

func (m *IcoMeta) BestImageSize() int

type JpegFormatError

type JpegFormatError string

func (JpegFormatError) Error

func (e JpegFormatError) Error() string

type Meta

type Meta interface {
	Format() string
	Width() int
	Height() int
}

func DecodeBmpMeta

func DecodeBmpMeta(r io.Reader) (Meta, error)

func DecodeGifMeta

func DecodeGifMeta(r io.Reader) (Meta, error)

func DecodeHeicMeta

func DecodeHeicMeta(r io.Reader) (Meta, error)

func DecodeJpegMeta

func DecodeJpegMeta(rr io.Reader) (Meta, error)

func DecodeMeta

func DecodeMeta(r io.Reader) (Meta, error)

func DecodePngMeta

func DecodePngMeta(r io.Reader) (Meta, error)

func DecodeTiffMeta

func DecodeTiffMeta(rr io.Reader) (Meta, error)

func DecodeWebpMeta

func DecodeWebpMeta(r io.Reader) (Meta, error)

type PngFormatError

type PngFormatError string

func (PngFormatError) Error

func (e PngFormatError) Error() string

type TiffFormatError

type TiffFormatError string

func (TiffFormatError) Error

func (e TiffFormatError) Error() string