filters

package

v0.0.1 Latest Latest Go to latest Published: Nov 21, 2025 License: MIT Imports: 24 Imported by: 0

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github.com/wudi/pdfkit

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Documentation ¶

Index ¶

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func ExtractFilters ¶

func ExtractFilters(dict raw.Dictionary) ([]string, []raw.Dictionary)

ExtractFilters reads Filter and DecodeParms entries from a stream dictionary.

Types ¶

type Decoder ¶

type Decoder interface {
	Name() string
	Decode(ctx context.Context, input []byte, params raw.Dictionary) ([]byte, error)
}

func NewASCII85Decoder ¶

func NewASCII85Decoder() Decoder

func NewASCIIHexDecoder ¶

func NewASCIIHexDecoder() Decoder

func NewCCITTFaxDecoder ¶

func NewCCITTFaxDecoder() Decoder

func NewCryptDecoder ¶

func NewCryptDecoder() Decoder

func NewDCTDecoder ¶

func NewDCTDecoder() Decoder

func NewFlateDecoder ¶

func NewFlateDecoder() Decoder

func NewJBIG2Decoder ¶

func NewJBIG2Decoder() Decoder

func NewJPXDecoder ¶

func NewJPXDecoder() Decoder

func NewLZWDecoder ¶

func NewLZWDecoder() Decoder

func NewRunLengthDecoder ¶

func NewRunLengthDecoder() Decoder

type Limits ¶

type Limits struct {
	MaxDecompressedSize int64
	MaxDecodeTime       time.Duration
}

type Pipeline ¶

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

func NewPipeline ¶

func NewPipeline(decoders []Decoder, limits Limits) *Pipeline

NewPipeline constructs a pipeline with provided decoders and limits.

func (*Pipeline) Decode ¶

func (p *Pipeline) Decode(ctx context.Context, input []byte, filterNames []string, params []raw.Dictionary) ([]byte, error)

func (*Pipeline) DecodeWithResolver ¶

func (p *Pipeline) DecodeWithResolver(ctx context.Context, input []byte, filterNames []string, params []raw.Dictionary, resolver StreamResolver) ([]byte, error)

DecodeWithResolver decodes a stream using the provided filters and optional resolver.

type Registry ¶

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

func (*Registry) Get ¶

func (r *Registry) Get(name string) (Decoder, bool)

func (*Registry) Register ¶

func (r *Registry) Register(d Decoder)

type StreamResolver ¶

type StreamResolver func(context.Context, raw.ObjectRef) ([]byte, error)

StreamResolver resolves referenced streams to decoded bytes for filters that need auxiliary data (e.g., JBIG2Globals).

type UnsupportedError ¶

type UnsupportedError struct{ Filter string }

UnsupportedError reports a filter that is recognized but not implemented.

func (UnsupportedError) Error ¶

func (e UnsupportedError) Error() string

Source Files ¶

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