types

package
v0.4.0 Latest Latest
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 Go to latest Published: Mar 1, 2023 License: Apache-2.0 Imports: 14 Imported by: 76

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Index

Constants

View Source 
const (
	EolLF   = "\x0A"
	EolCR   = "\x0D"
	EolCRLF = "\x0D\x0A"
)

Supported line delimiters

View Source 
const FreeHeadGeneration = 65535

FreeHeadGeneration is the predefined generation number for the head of the free list.

Variables

View Source 
var ErrInvalidUTF16BE = errors.New("pdfcpu: invalid UTF-16BE detected")

ErrInvalidUTF16BE represents an error that gets raised for invalid UTF-16BE byte sequences.

View Source 
var PaperSize = map[string]*Dim{}/* 150 elements not displayed */

PaperSize is a map of known paper sizes in user units (=72 dpi pixels).

Functions

func AnchorPosition 

func AnchorPosition(a Anchor, r *Rectangle, w, h float64) (x float64, y float64)

func BestFitRectIntoRect 

func BestFitRectIntoRect(rSrc, rDest *Rectangle, enforceOrient, scaleUp bool) (w, h, dx, dy, rot float64)

func ByteForOctalString 

func ByteForOctalString(octalBytes string) (b byte)

Convert a 1,2 or 3 digit unescaped octal string into the corresponding byte value.

func CP1252ToUTF8 

func CP1252ToUTF8(s string) string

CP1252ToUTF8 converts CP1252 to UTF-8.

func DateString 

func DateString(t time.Time) string

DateString returns a string representation of t.

func DateTime 

func DateTime(s string, relaxed bool) (time.Time, bool)

DateTime decodes s into a time.Time.

func DecodeName 

func DecodeName(s string) (string, error)

DecodeName applies name decoding according to PDF spec.

func DecodeUTF16String 

func DecodeUTF16String(s string) (string, error)

DecodeUTF16String decodes a UTF16BE string from a hex string.

func EncodeName 

func EncodeName(s string) string

EncodeName applies name encoding according to PDF spec.

func EncodeUTF16String 

func EncodeUTF16String(s string) string

func EqualSlices 

func EqualSlices(a, b []string) bool

func Escape 

func Escape(s string) (*string, error)

Escape applies all defined escape sequences to s.

func EscapeUTF16String 

func EscapeUTF16String(s string) (*string, error)

func HexLiteralToString 

func HexLiteralToString(hl HexLiteral) (string, error)

HexLiteralToString returns a possibly UTF16 encoded string for a hex string.

func IndRefMemberOf 

func IndRefMemberOf(i IndirectRef, arr Array) bool

IntMemberOf returns true if list contains i.

func IntMemberOf 

func IntMemberOf(i int, list []int) bool

IntMemberOf returns true if list contains i.

func IsStringUTF16BE 

func IsStringUTF16BE(s string) bool

IsStringUTF16BE checks a string for Big Endian byte order BOM.

func IsUTF16BE 

func IsUTF16BE(b []byte) bool

IsUTF16BE checks for Big Endian byte order mark and valid length.

func MemberOf 

func MemberOf(s string, list []string) bool

MemberOf returns true if list contains s.

func NormalizeCoord 

func NormalizeCoord(x, y float64, r *Rectangle, origin Corner, absolute bool) (float64, float64)

NormalizeCoord transfers P(x,y) from pdfcpu user space into PDF user space, which uses a coordinate system with origin in the lower left corner of r.

pdfcpu user space coordinate systems have the origin in one of four corners of r:

LowerLeft corner (default = PDF user space) 

x extends to the right,
y extends upward

LowerRight corner: 

x extends to the left,
y extends upward

UpperLeft corner: 

x extends to the right,
y extends downward

UpperRight corner: 

x extends to the left,
y extends downward

func NormalizeOffset 

func NormalizeOffset(x, y float64, origin Corner) (float64, float64)

Normalize offset transfers x and y into offsets in the PDF user space.

func Reverse 

func Reverse(s string) string

Reverse reverses the runes within s.

func StringLiteralToString 

func StringLiteralToString(sl StringLiteral) (string, error)

StringLiteralToString returns the best possible string rep for a string literal.

func ToUserSpace 

func ToUserSpace(f float64, unit DisplayUnit) float64

func UTF8ToCP1252 

func UTF8ToCP1252(s string) string

UTF8ToCP1252 converts UTF-8 to CP1252.

func Unescape 

func Unescape(s string, enc bool) ([]byte, error)

Unescape resolves all escape sequences of s.

Types

type Anchor 

type Anchor int

Anchor represents symbolic positions within a rectangular region. 

const (
	TopLeft Anchor = iota
	TopCenter
	TopRight
	Left
	Center // default
	Right
	BottomLeft
	BottomCenter
	BottomRight
	Full // special case, no anchor needed, imageSize = pageSize
)

These are the defined anchors for relative positioning.

func ParseAnchor 

func ParseAnchor(s string) (Anchor, error)

func ParsePositionAnchor 

func ParsePositionAnchor(s string) (Anchor, error)

func (Anchor) String 

func (a Anchor) String() string

type Array 

type Array []Object

Array represents a PDF array object.

func NewIntegerArray 

func NewIntegerArray(fVars ...int) Array

NewIntegerArray returns a PDFArray with Integer entries.

func NewNameArray 

func NewNameArray(sVars ...string) Array

NewNameArray returns a PDFArray with Name entries.

func NewNumberArray 

func NewNumberArray(fVars ...float64) Array

NewNumberArray returns a PDFArray with Float entries.

func NewStringArray 

func NewStringArray(sVars ...string) Array

NewStringArray returns a PDFArray with StringLiteral entries.

func (Array) Clone 

func (a Array) Clone() Object

Clone returns a clone of a.

func (Array) FloatNumber 

func (a Array) FloatNumber(ind int) (float64, error)

FloatNumber returns the element at index ind of a numbers array and returns a float64.

func (Array) PDFString 

func (a Array) PDFString() string

PDFString returns a string representation as found in and written to a PDF file.

func (Array) String 

func (a Array) String() string

type Boolean 

type Boolean bool

Boolean represents a PDF boolean object.

func (Boolean) Clone 

func (boolean Boolean) Clone() Object

Clone returns a clone of boolean.

func (Boolean) PDFString 

func (boolean Boolean) PDFString() string

PDFString returns a string representation as found in and written to a PDF file.

func (Boolean) String 

func (boolean Boolean) String() string

func (Boolean) Value 

func (boolean Boolean) Value() bool

Value returns a bool value for this PDF object.

type ByteSize 

type ByteSize float64

ByteSize represents the various terms for storage space. 

const (
	KB ByteSize = 1 << (10 * iota)
	MB
	GB
)

Storage space terms.

func (ByteSize) String 

func (b ByteSize) String() string

type Corner 

type Corner int

Corner represents one of four rectangle corners. 

const (
	LowerLeft Corner = iota
	LowerRight
	UpperLeft
	UpperRight
)

The four corners of a rectangle.

func ParseOrigin 

func ParseOrigin(s string) (Corner, error)

type Dict 

type Dict map[string]Object

Dict represents a PDF dict object.

func NewDict 

func NewDict() Dict

NewDict returns a new PDFDict object.

func (Dict) ArrayEntry 

func (d Dict) ArrayEntry(key string) Array

ArrayEntry expects and returns a Array entry for given key.

func (Dict) BooleanEntry 

func (d Dict) BooleanEntry(key string) *bool

BooleanEntry expects and returns a BooleanEntry for given key.

func (Dict) Clone 

func (d Dict) Clone() Object

Clone returns a clone of d.

func (Dict) Delete 

func (d Dict) Delete(key string) (value Object)

Delete deletes the Object for given key.

func (Dict) DictEntry 

func (d Dict) DictEntry(key string) Dict

DictEntry expects and returns a PDFDict entry for given key.

func (Dict) Entry 

func (d Dict) Entry(dictName, key string, required bool) (Object, error)

Entry returns the value for given key.

func (Dict) Find 

func (d Dict) Find(key string) (Object, bool)

Find returns the Object for given key and PDFDict.

func (Dict) First 

func (d Dict) First() *int

First returns a *int for key "First".

func (Dict) HexLiteralEntry 

func (d Dict) HexLiteralEntry(key string) *HexLiteral

HexLiteralEntry returns a HexLiteral object for given key.

func (*Dict) Increment 

func (d *Dict) Increment(key string) error

Increment increments the integer value for given key.

func (*Dict) IncrementBy 

func (d *Dict) IncrementBy(key string, i int) error

IncrementBy increments the integer value for given key by i.

func (Dict) Index 

func (d Dict) Index() Array

Index returns a *Array for key "Index".

func (Dict) IndirectRefEntry 

func (d Dict) IndirectRefEntry(key string) *IndirectRef

IndirectRefEntry returns an indirectRefEntry for given key for this dictionary.

func (Dict) Insert 

func (d Dict) Insert(key string, value Object) (ok bool)

Insert adds a new entry to this PDFDict.

func (Dict) InsertFloat 

func (d Dict) InsertFloat(key string, value float32)

InsertFloat adds a new float entry to this PDFDict.

func (Dict) InsertInt 

func (d Dict) InsertInt(key string, value int)

InsertInt adds a new int entry to this PDFDict.

func (Dict) InsertName 

func (d Dict) InsertName(key, value string)

InsertName adds a new name entry to this PDFDict.

func (Dict) InsertString 

func (d Dict) InsertString(key, value string)

InsertString adds a new string entry to this PDFDict.

func (Dict) Int64Entry 

func (d Dict) Int64Entry(key string) *int64

Int64Entry expects and returns a Integer entry representing an int64 value for given key.

func (Dict) IntEntry 

func (d Dict) IntEntry(key string) *int

IntEntry expects and returns a Integer entry for given key.

func (Dict) IsLinearizationParmDict 

func (d Dict) IsLinearizationParmDict() bool

IsLinearizationParmDict returns true if this dict has an int entry for key "Linearized".

func (Dict) IsObjStm 

func (d Dict) IsObjStm() bool

IsObjStm returns true if given PDFDict is an object stream.

func (Dict) Len 

func (d Dict) Len() int

Len returns the length of this PDFDict.

func (Dict) Length 

func (d Dict) Length() (*int64, *int)

Length returns a *int64 for entry with key "Length". Stream length may be referring to an indirect object.

func (Dict) N 

func (d Dict) N() *int

N returns a *int for key "N".

func (Dict) NameEntry 

func (d Dict) NameEntry(key string) *string

NameEntry expects and returns a Name entry for given key.

func (Dict) NewIDForPrefix 

func (d Dict) NewIDForPrefix(prefix string, i int) string

NewIDForPrefix returns next id with prefix.

func (Dict) PDFString 

func (d Dict) PDFString() string

PDFString returns a string representation as found in and written to a PDF file.

func (Dict) Prev 

func (d Dict) Prev() *int64

Prev returns the previous offset.

func (Dict) Size 

func (d Dict) Size() *int

Size returns the value of the int entry for key "Size"

func (Dict) StreamDictEntry 

func (d Dict) StreamDictEntry(key string) *StreamDict

StreamDictEntry expects and returns a StreamDict entry for given key. unused.

func (Dict) String 

func (d Dict) String() string

func (Dict) StringEntry 

func (d Dict) StringEntry(key string) *string

StringEntry expects and returns a StringLiteral entry for given key.

func (Dict) StringEntryBytes 

func (d Dict) StringEntryBytes(key string) ([]byte, error)

StringEntryBytes returns the byte slice representing the string value for key.

func (Dict) StringLiteralEntry 

func (d Dict) StringLiteralEntry(key string) *StringLiteral

StringLiteralEntry returns a StringLiteral object for given key.

func (Dict) Subtype 

func (d Dict) Subtype() *string

Subtype returns the value of the name entry for key "Subtype".

func (Dict) Type 

func (d Dict) Type() *string

Type returns the value of the name entry for key "Type".

func (Dict) Update 

func (d Dict) Update(key string, value Object)

Update modifies an existing entry of this PDFDict.

func (Dict) W 

func (d Dict) W() Array

W returns a *Array for key "W".

type Dim 

type Dim struct {
	Width, Height float64
}

Dim represents the dimensions of a rectangular view medium like a PDF page, a sheet of paper or an image grid in user space, inches, centimetres or millimetres.

func ParsePageFormat 

func ParsePageFormat(v string) (*Dim, string, error)

func (Dim) AspectRatio 

func (d Dim) AspectRatio() float64

AspectRatio returns the relation between width and height.

func (Dim) Landscape 

func (d Dim) Landscape() bool

Landscape returns true if d is in landscape mode.

func (Dim) Portrait 

func (d Dim) Portrait() bool

Portrait returns true if d is in portrait mode.

func (Dim) String 

func (d Dim) String() string

func (Dim) ToCentimetres 

func (d Dim) ToCentimetres() Dim

ToCentimetres converts d to centimetres.

func (Dim) ToInches 

func (d Dim) ToInches() Dim

ToInches converts d to inches.

func (Dim) ToMillimetres 

func (d Dim) ToMillimetres() Dim

ToMillimetres converts d to centimetres.

type DisplayUnit 

type DisplayUnit int

DisplayUnit is the metric unit used to output paper sizes. 

const (
	POINTS DisplayUnit = iota
	INCHES
	CENTIMETRES
	MILLIMETRES
)

Options for display unit in effect.

type Float 

type Float float64

Float represents a PDF float object.

func (Float) Clone 

func (f Float) Clone() Object

Clone returns a clone of f.

func (Float) PDFString 

func (f Float) PDFString() string

PDFString returns a string representation as found in and written to a PDF file.

func (Float) String 

func (f Float) String() string

func (Float) Value 

func (f Float) Value() float64

Value returns a float64 value for this PDF object.

type HAlignment 

type HAlignment int

HAlignment represents the horizontal alignment of text. 

const (
	AlignLeft HAlignment = iota
	AlignCenter
	AlignRight
	AlignJustify
)

These are the options for horizontal aligned text.

func ParseHorAlignment 

func ParseHorAlignment(s string) (HAlignment, error)

type HexLiteral 

type HexLiteral string

HexLiteral represents a PDF hex literal object.

func NewHexLiteral 

func NewHexLiteral(b []byte) HexLiteral

NewHexLiteral creates a new HexLiteral for b..

func (HexLiteral) Bytes 

func (hexliteral HexLiteral) Bytes() ([]byte, error)

Bytes returns the byte representation.

func (HexLiteral) Clone 

func (hexliteral HexLiteral) Clone() Object

Clone returns a clone of hexliteral.

func (HexLiteral) PDFString 

func (hexliteral HexLiteral) PDFString() string

PDFString returns the string representation as found in and written to a PDF file.

func (HexLiteral) String 

func (hexliteral HexLiteral) String() string

func (HexLiteral) Value 

func (hexliteral HexLiteral) Value() string

Value returns a string value for this PDF object.

type IndirectRef 

type IndirectRef struct {
	ObjectNumber     Integer
	GenerationNumber Integer
}

IndirectRef represents a PDF indirect object.

func NewIndirectRef 

func NewIndirectRef(objectNumber, generationNumber int) *IndirectRef

NewIndirectRef returns a new PDFIndirectRef object.

func (IndirectRef) Clone 

func (ir IndirectRef) Clone() Object

Clone returns a clone of ir.

func (IndirectRef) PDFString 

func (ir IndirectRef) PDFString() string

PDFString returns a string representation as found in and written to a PDF file.

func (IndirectRef) String 

func (ir IndirectRef) String() string

type IntSet 

type IntSet map[int]bool

IntSet is a set of integers.

type Integer 

type Integer int

Integer represents a PDF integer object.

func (Integer) Clone 

func (i Integer) Clone() Object

Clone returns a clone of i.

func (Integer) PDFString 

func (i Integer) PDFString() string

PDFString returns a string representation as found in and written to a PDF file.

func (Integer) String 

func (i Integer) String() string

func (Integer) Value 

func (i Integer) Value() int

Value returns an int value for this PDF object.

type LineJoinStyle 

type LineJoinStyle int

LineJoinStyle represents the shape to be used at the corners of paths that are stroked (see 8.4.3.4) 

const (
	LJMiter LineJoinStyle = iota
	LJRound
	LJBevel
)

Render mode

type Name 

type Name string

Name represents a PDF name object.

func (Name) Clone 

func (nameObject Name) Clone() Object

Clone returns a clone of nameObject.

func (Name) PDFString 

func (nameObject Name) PDFString() string

PDFString returns a string representation as found in and written to a PDF file.

func (Name) String 

func (nameObject Name) String() string

func (Name) Value 

func (nameObject Name) Value() string

Value returns a string value for this PDF object.

type Object 

type Object interface {
	fmt.Stringer
	Clone() Object
	PDFString() string
}

Object defines an interface for all Objects.

type ObjectStreamDict 

type ObjectStreamDict struct {
	StreamDict
	Prolog         []byte
	ObjCount       int
	FirstObjOffset int
	ObjArray       Array
}

ObjectStreamDict represents a object stream dictionary.

func NewObjectStreamDict 

func NewObjectStreamDict() *ObjectStreamDict

NewObjectStreamDict creates a new ObjectStreamDict object.

func (*ObjectStreamDict) AddObject 

func (osd *ObjectStreamDict) AddObject(objNumber int, pdfString string) error

AddObject adds another object to this object stream. Relies on decoded content!

func (*ObjectStreamDict) Finalize 

func (osd *ObjectStreamDict) Finalize()

Finalize prepares the final content of the objectstream.

func (*ObjectStreamDict) IndexedObject 

func (osd *ObjectStreamDict) IndexedObject(index int) (Object, error)

IndexedObject returns the object at given index from a ObjectStreamDict.

type Orientation 

type Orientation int

TODO Refactor because of orientation in nup.go 

const (
	Horizontal Orientation = iota
	Vertical
)

type PDFFilter 

type PDFFilter struct {
	Name        string
	DecodeParms Dict
}

PDFFilter represents a PDF stream filter object.

type Point 

type Point struct {
	X, Y float64
}

Point represents a user space location.

func (Point) String 

func (p Point) String() string

func (*Point) Translate 

func (p *Point) Translate(dx, dy float64)

Translate modifies p's coordinates.

type QuadLiteral 

type QuadLiteral struct {
	P1, P2, P3, P4 Point
}

QuadLiteral is a polygon with four edges and four vertices. The four vertices are assumed to be specified in counter clockwise order.

func (QuadLiteral) Array 

func (ql QuadLiteral) Array() Array

Array returns the PDF representation of ql.

func (QuadLiteral) EnclosingRectangle 

func (ql QuadLiteral) EnclosingRectangle(f float64) *Rectangle

EnclosingRectangle calculates the rectangle enclosing ql's vertices at a distance f.

type QuadPoints 

type QuadPoints []QuadLiteral

QuadPoints is an array of 8 × n numbers specifying the coordinates of n quadrilaterals in default user space.

func (*QuadPoints) AddQuadLiteral 

func (qp *QuadPoints) AddQuadLiteral(ql QuadLiteral)

AddQuadLiteral adds a quadliteral to qp.

func (*QuadPoints) Array 

func (qp *QuadPoints) Array() Array

Array returns the PDF representation of qp.

type Rectangle 

type Rectangle struct {
	LL, UR Point
}

Rectangle represents a rectangular region in userspace.

func NewRectangle 

func NewRectangle(llx, lly, urx, ury float64) *Rectangle

NewRectangle returns a new rectangle for given corner coordinates.

func RectForArray 

func RectForArray(a Array) (*Rectangle, error)

RectForArray returns a new rectangle for given Array.

func RectForDim 

func RectForDim(width, height float64) *Rectangle

RectForDim returns a new rectangle for given dimensions.

func RectForFormat 

func RectForFormat(f string) *Rectangle

RectForFormat returns a new rectangle for given format.

func RectForWidthAndHeight 

func RectForWidthAndHeight(llx, lly, width, height float64) *Rectangle

RectForWidthAndHeight returns a new rectangle for given dimensions.

func (Rectangle) Array 

func (r Rectangle) Array() Array

Array returns the PDF representation of a rectangle.

func (Rectangle) AspectRatio 

func (r Rectangle) AspectRatio() float64

AspectRatio returns the relation between width and height of a rectangle.

func (Rectangle) Center 

func (r Rectangle) Center() Point

Center returns the center point of a rectangle.

func (Rectangle) Clone 

func (r Rectangle) Clone() *Rectangle

Clone returns a clone of r.

func (Rectangle) Contains 

func (r Rectangle) Contains(p Point) bool

Contains returns true if rectangle r contains point p.

func (Rectangle) CroppedCopy 

func (r Rectangle) CroppedCopy(margin float64) *Rectangle

CroppedCopy returns a copy of r with applied margin..

func (Rectangle) Dimensions 

func (r Rectangle) Dimensions() Dim

Dimensions returns r's dimensions.

func (Rectangle) Equals 

func (r Rectangle) Equals(r2 Rectangle) bool

func (Rectangle) FitsWithin 

func (r Rectangle) FitsWithin(r2 *Rectangle) bool

FitsWithin returns true if rectangle r fits within rectangle r2.

func (Rectangle) Format 

func (r Rectangle) Format(unit DisplayUnit) string

Format returns r's details converted into unit.

func (Rectangle) Height 

func (r Rectangle) Height() float64

Height returns the vertical span of a rectangle in userspace.

func (Rectangle) Landscape 

func (r Rectangle) Landscape() bool

Landscape returns true if r is in landscape mode.

func (Rectangle) Portrait 

func (r Rectangle) Portrait() bool

Portrait returns true if r is in portrait mode.

func (Rectangle) ScaledHeight 

func (r Rectangle) ScaledHeight(w float64) float64

ScaledHeight returns the height for given width according to r's aspect ratio.

func (Rectangle) ScaledWidth 

func (r Rectangle) ScaledWidth(h float64) float64

ScaledWidth returns the width for given height according to r's aspect ratio.

func (Rectangle) ShortString 

func (r Rectangle) ShortString() string

ShortString returns a compact string representation for r.

func (Rectangle) String 

func (r Rectangle) String() string

func (*Rectangle) Translate 

func (r *Rectangle) Translate(dx, dy float64)

Translate moves r by dx and dy.

func (Rectangle) Width 

func (r Rectangle) Width() float64

Width returns the horizontal span of a rectangle in userspace.

type RelPosition 

type RelPosition int

RelPosition represents the relative position of a text field's label. 

const (
	RelPosLeft RelPosition = iota
	RelPosRight
	RelPosTop
	RelPosBottom
)

These are the options for relative label positions.

func ParseRelPosition 

func ParseRelPosition(s string) (RelPosition, error)

type StreamDict 

type StreamDict struct {
	Dict
	StreamOffset      int64
	StreamLength      *int64
	StreamLengthObjNr *int
	FilterPipeline    []PDFFilter
	Raw               []byte // Encoded
	Content           []byte // Decoded
	//DCTImage          image.Image
	IsPageContent bool
	CSComponents  int
}

StreamDict represents a PDF stream dict object.

func NewStreamDict 

func NewStreamDict(d Dict, streamOffset int64, streamLength *int64, streamLengthObjNr *int, filterPipeline []PDFFilter) StreamDict

NewStreamDict creates a new PDFStreamDict for given PDFDict, stream offset and length.

func (StreamDict) Clone 

func (sd StreamDict) Clone() Object

Clone returns a clone of sd.

func (*StreamDict) Decode 

func (sd *StreamDict) Decode() error

Decode applies sd's filter pipeline to sd.Raw in order to produce sd.Content.

func (*StreamDict) Encode 

func (sd *StreamDict) Encode() error

Encode applies sd's filter pipeline to sd.Content in order to produce sd.Raw.

func (StreamDict) HasSoleFilterNamed 

func (sd StreamDict) HasSoleFilterNamed(filterName string) bool

HasSoleFilterNamed returns true if sd has a filterPipeline with 1 filter named filterName.

func (StreamDict) Image 

func (sd StreamDict) Image() bool

type StringLiteral 

type StringLiteral string

StringLiteral represents a PDF string literal object.

func (StringLiteral) Clone 

func (stringliteral StringLiteral) Clone() Object

Clone returns a clone of stringLiteral.

func (StringLiteral) PDFString 

func (stringliteral StringLiteral) PDFString() string

PDFString returns a string representation as found in and written to a PDF file.

func (StringLiteral) String 

func (stringliteral StringLiteral) String() string

func (StringLiteral) Value 

func (stringliteral StringLiteral) Value() string

Value returns a string value for this PDF object.

type StringSet 

type StringSet map[string]bool

StringSet is a set of strings.

func NewStringSet 

func NewStringSet(slice []string) StringSet

NewStringSet returns a new StringSet for slice.

type VAlignment 

type VAlignment int

VAlignment represents the vertical alignment of text. 

const (
	AlignBaseline VAlignment = iota
	AlignTop
	AlignMiddle
	AlignBottom
)

These are the options for vertical aligned text.

type XRefStreamDict 

type XRefStreamDict struct {
	StreamDict
	Size           int
	Objects        []int
	W              [3]int
	PreviousOffset *int64
}

XRefStreamDict represents a cross reference stream dictionary.

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