tiffstructure

README

Overview

Parse raw TIFF data.

Requirements

• Go >= 1.17: Earlier versions may work, though testing broke before due to a "undefined: unsafe.Slice" error apparently in the basic flow of "go test".

Documentation

Index

• type TiffMediaContext
  • func (tmc *TiffMediaContext) Exif() (rootIfd *exif.Ifd, data []byte, err error)
• type TiffMediaParser
  • func NewTiffMediaParser() *TiffMediaParser
  • func (tmp *TiffMediaParser) LooksLikeFormat(data []byte) bool
  • func (tmp *TiffMediaParser) Parse(rs io.ReadSeeker, size int) (mc riimage.MediaContext, err error)
  • func (tmp *TiffMediaParser) ParseBytes(data []byte) (mc riimage.MediaContext, err error)
  • func (tmp *TiffMediaParser) ParseFile(filepath string) (mc riimage.MediaContext, err error)

Examples

• TiffMediaParser.LooksLikeFormat

Types

type TiffMediaContext

type TiffMediaContext struct {
	// contains filtered or unexported fields
}

TiffMediaContext encapsulates parsed EXIF data.

func (*TiffMediaContext) Exif

func (tmc *TiffMediaContext) Exif() (rootIfd *exif.Ifd, data []byte, err error)

Exif is an accessor that returns the root IFD.

type TiffMediaParser

type TiffMediaParser struct {
}

TiffMediaParser knows how to parse a TIFF stream.

func NewTiffMediaParser

func NewTiffMediaParser() *TiffMediaParser

NewTiffMediaParser returns a new `TiffMediaParser` struct.

func (*TiffMediaParser) LooksLikeFormat

func (tmp *TiffMediaParser) LooksLikeFormat(data []byte) bool

LooksLikeFormat returns a boolean indicating whether this looks like a TIFF stream.

Example

filepath := getTestExifImageFilepath()

data, err := ioutil.ReadFile(filepath)
log.PanicIf(err)

pmp := NewTiffMediaParser()

isPng := pmp.LooksLikeFormat(data)
fmt.Printf("%v\n", isPng)

Output:

true

func (*TiffMediaParser) Parse

func (tmp *TiffMediaParser) Parse(rs io.ReadSeeker, size int) (mc riimage.MediaContext, err error)

Parse parses a TIFF stream given a `io.ReadSeeker`.

func (*TiffMediaParser) ParseBytes

func (tmp *TiffMediaParser) ParseBytes(data []byte) (mc riimage.MediaContext, err error)

ParseBytes parses a TIFF stream given a byte-slice.

func (*TiffMediaParser) ParseFile

func (tmp *TiffMediaParser) ParseFile(filepath string) (mc riimage.MediaContext, err error)

ParseFile parses a TIFF stream given a file-path.