filter

Documentation

Overview

Package filter contains PDF filter implementations.

Index

• Variables
• func List() []string
• type Filter
  • func NewFilter(filterName string, parms map[string]int) (filter Filter, err error)

Variables

var (

	// ErrUnsupportedFilter signals an unsupported filter type.
	ErrUnsupportedFilter = errors.New("Filter not supported")
)

Functions

func List

func List() []string

List return the list of all supported PDF filters.

Types

type Filter

type Filter interface {
	Encode(r io.Reader) (*bytes.Buffer, error)
	Decode(r io.Reader) (*bytes.Buffer, error)
}

Filter defines an interface for encoding/decoding buffers.

func NewFilter

func NewFilter(filterName string, parms map[string]int) (filter Filter, err error)

NewFilter returns a filter for given filterName and an optional parameter dictionary.