pdfcpu

package
v0.3.11 Latest Latest
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 Go to latest Published: Apr 5, 2021 License: Apache-2.0 Imports: 40 Imported by: 89

Documentation

Overview

Package pdfcpu is a PDF processing library written in Go supporting encryption. It provides an API and a command line interface. Supported are all versions up to PDF 1.7 (ISO-32000).

The commands are: 

attachments	list, add, remove, extract embedded file attachments
booklet     arrange pages onto larger sheets of paper to make a booklet or zine
boxes       list, add, remove page boundaries for selected pages
changeopw	change owner password
changeupw	change user password
collect		create custom sequence of selected pages
crop        set cropbox for selected pages
decrypt		remove password protection
encrypt		set password protection
extract		extract images, fonts, content, pages or metadata
fonts		install, list supported fonts, create cheat sheets
grid		rearrange pages or images for enhanced browsing experience
import		import/convert images to PDF
info		print file info
keywords	list, add, remove keywords
merge		concatenate PDFs
nup			rearrange pages or images for reduced number of pages
optimize	optimize PDF by getting rid of redundant page resources
pages		insert, remove selected pages
paper		print list of supported paper sizes
permissions	list, set user access permissions
portfolio	list, add, remove, extract portfolio entries with optional description
properties	list, add, remove document properties
rotate		rotate pages
split		split up a PDF by span or bookmark
stamp		add, remove, update Unicode text, image or PDF stamps for selected pages
trim		create trimmed version of selected pages
validate	validate PDF against PDF 32000-1:2008 (PDF 1.7)
version		print version
watermark	add, remove, update Unicode text, image or PDF watermarks for selected pages

Index

Constants

View Source 
const (
	DeviceGrayCS = "DeviceGray"
	DeviceRGBCS  = "DeviceRGB"
	DeviceCMYKCS = "DeviceCMYK"
	CalGrayCS    = "CalGray"
	CalRGBCS     = "CalRGB"
	LabCS        = "Lab"
	ICCBasedCS   = "ICCBased"
	IndexedCS    = "Indexed"
	PatternCS    = "Pattern"
	SeparationCS = "Separation"
	DeviceNCS    = "DeviceN"
)

PDF defines the following Color Spaces:

View Source 
const (
	// ValidationStrict ensures 100% compliance with the spec (PDF 32000-1:2008).
	ValidationStrict int = iota

	// ValidationRelaxed ensures PDF compliance based on frequently encountered validation errors.
	ValidationRelaxed

	// ValidationNone bypasses validation.
	ValidationNone
)
View Source 
const (

	// StatsFileNameDefault is the standard stats filename.
	StatsFileNameDefault = "stats.csv"

	// PermissionsAll enables all user access permission bits.
	PermissionsAll int16 = -1 // 0xFFFF

	// PermissionsNone disables all user access permissions bits.
	PermissionsNone int16 = -3901 // 0xF0C3

)
View Source 
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.

View Source 
const (
	RightDown orientation = iota
	DownRight
	LeftDown
	DownLeft
)

These are the defined anchors for relative positioning.

View Source 
const (
	WMText = iota
	WMImage
	WMPDF
)

Watermark mode

View Source 
const (
	NoDiagonal = iota
	DiagonalLLToUR
	DiagonalULToLR
)

Rotation along one of 2 diagonals

View Source 
const (
	RootVersion = iota
	RootExtensions
	RootPageLabels
	RootNames
	RootDests
	RootViewerPrefs
	RootPageLayout
	RootPageMode
	RootOutlines
	RootThreads
	RootOpenAction
	RootAA
	RootURI
	RootAcroForm
	RootMetadata
	RootStructTreeRoot
	RootMarkInfo
	RootLang
	RootSpiderInfo
	RootOutputIntents
	RootPieceInfo
	RootOCProperties
	RootPerms
	RootLegal
	RootRequirements
	RootCollection
	RootNeedsRendering
)

The PDF root object fields.

View Source 
const (
	PageLastModified = iota
	PageResources
	PageMediaBox
	PageCropBox
	PageBleedBox
	PageTrimBox
	PageArtBox
	PageBoxColorInfo
	PageContents
	PageRotate
	PageGroup
	PageThumb
	PageB
	PageDur
	PageTrans
	PageAnnots
	PageAA
	PageMetadata
	PagePieceInfo
	PageStructParents
	PageID
	PagePZ
	PageSeparationInfo
	PageTabs
	PageTemplateInstantiated
	PagePresSteps
	PageUserUnit
	PageVP
)

The PDF page object fields.

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.

View Source 
const (

	// ObjectStreamMaxObjects limits the number of objects within an object stream written.
	ObjectStreamMaxObjects = 100
)

Variables

View Source 
var (
	Black     = SimpleColor{}
	White     = SimpleColor{R: 1, G: 1, B: 1}
	Gray      = SimpleColor{.5, .5, .5}
	LightGray = SimpleColor{.9, .9, .9}
)

Some popular colors.

View Source 
var ConfigPath string = "default"

ConfigPath defines the location of pdfcpu's configuration directory. If set to a file path, pdfcpu will ensure the config dir at this location. Other possible values: 

default:	Ensure config dir at default location
disable:	Disable config dir usage
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 (
	ErrUnsupported16BPC = errors.New("unsupported 16 bits per component")
)

Errors to be identified.

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).

View Source 
var VersionStr = "v0.3.11 dev"

VersionStr is the current pdfcpu version.

Functions

func AddPages added in v0.3.4 

func AddPages(ctx, ctxDest *Context, pages []int, usePgCache bool) error

AddPages adds pages and corresponding resources from otherXRefTable to xRefTable.

func AppendPageTree added in v0.1.20 

func AppendPageTree(d1 *IndirectRef, countd1 int, d2 Dict) error

AppendPageTree appends a pagetree d1 to page tree d2.

func AppendStatsFile 

func AppendStatsFile(ctx *Context) error

AppendStatsFile appends a stats line for this xRefTable to the configured csv file name.

func BookletFromImages added in v0.3.9 

func BookletFromImages(ctx *Context, fileNames []string, nup *NUp, pagesDict Dict, pagesIndRef *IndirectRef) error

BookletFromImages creates a booklet version of the image sequence represented by fileNames.

func CP1252ToUTF8 added in v0.3.8 

func CP1252ToUTF8(s string) string

CP1252ToUTF8 converts CP1252 to UTF-8.

func CreateTestPageContent added in v0.3.3 

func CreateTestPageContent(p Page)

CreateTestPageContent draws a test grid.

func DateString added in v0.1.16 

func DateString(t time.Time) string

DateString returns a string representation of t.

func DateTime added in v0.3.5 

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

DateTime decodes s into a time.Time.

func DecodeUTF16String 

func DecodeUTF16String(s string) (string, error)

DecodeUTF16String decodes a UTF16BE string from a hex string.

func DrawAndFillRect added in v0.3.3 

func DrawAndFillRect(w io.Writer, r *Rectangle)

DrawAndFillRect strokes and fills a rectangular path for r.

func DrawGrid added in v0.3.3 

func DrawGrid(w io.Writer, x, y int, r *Rectangle, strokeCol SimpleColor, fillCol *SimpleColor)

DrawGrid draws an x * y grid on r using strokeCol and fillCol.

func DrawHairCross added in v0.3.3 

func DrawHairCross(w io.Writer, x, y float64, r *Rectangle)

DrawHairCross draw a haircross with origin x/y.

func DrawLine added in v0.3.3 

func DrawLine(w io.Writer, xp, yp, xq, yq float64)

DrawLine draws the path from P to Q.

func DrawRect added in v0.3.3 

func DrawRect(w io.Writer, r *Rectangle)

DrawRect strokes a rectangular path for r.

func EnsureDefaultConfigAt added in v0.3.6 

func EnsureDefaultConfigAt(path string) error

EnsureDefaultConfigAt tries to load the default configuration from path. If path/pdfcpu/config.yaml is not found, it will be created.

func Escape 

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

Escape applies all defined escape sequences to s.

func FillRect added in v0.3.3 

func FillRect(w io.Writer, rect *Rectangle, c SimpleColor)

FillRect draws and fills a rectangle using r, g, b.

func FillRectStacked added in v0.3.9 

func FillRectStacked(w io.Writer, r *Rectangle, c SimpleColor)

FillRectStacked is a safe way to fill a rectangle within a page content stream.

func HexLiteralToString 

func HexLiteralToString(hexString string) (string, error)

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

func ImageFileName added in v0.3.10 

func ImageFileName(fileName string) bool

ImageFileName returns true for supported image file types.

func ImageFileNames added in v0.3.10 

func ImageFileNames(dir string) ([]string, error)

ImageFileNames returns a slice of image file names contained in dir.

func IntMemberOf added in v0.1.16 

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 KeywordsAdd added in v0.3.2 

func KeywordsAdd(xRefTable *XRefTable, keywords []string) error

KeywordsAdd adds keywords to the document info dict. Returns true if at least one keyword was added.

func KeywordsList added in v0.3.2 

func KeywordsList(xRefTable *XRefTable) ([]string, error)

KeywordsList returns a list of keywords as recorded in the document info dict.

func KeywordsRemove added in v0.3.2 

func KeywordsRemove(xRefTable *XRefTable, keywords []string) (bool, error)

KeywordsRemove deletes keywords from the document info dict. Returns true if at least one keyword was removed.

func MemberOf added in v0.1.16 

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

MemberOf returns true if list contains s.

func MergeXRefTables 

func MergeXRefTables(ctxSource, ctxDest *Context) (err error)

MergeXRefTables merges Context ctxSource into ctxDest by appending its page tree.

func NUpFromMultipleImages added in v0.3.8 

func NUpFromMultipleImages(ctx *Context, fileNames []string, nup *NUp, pagesDict Dict, pagesIndRef *IndirectRef) error

NUpFromMultipleImages creates pages in NUp-style rendering each image once.

func NUpFromOneImage added in v0.3.8 

func NUpFromOneImage(ctx *Context, fileName string, nup *NUp, pagesDict Dict, pagesIndRef *IndirectRef) error

NUpFromOneImage creates one page with instances of one image.

func OptimizeXRefTable 

func OptimizeXRefTable(ctx *Context) error

OptimizeXRefTable optimizes an xRefTable by locating and getting rid of redundant embedded fonts and images.

func ParseNUpDetails added in v0.1.21 

func ParseNUpDetails(s string, nup *NUp) error

ParseNUpDetails parses a NUp command string into an internal structure.

func ParseNUpGridDefinition added in v0.1.21 

func ParseNUpGridDefinition(rows, cols int, nUp *NUp) error

ParseNUpGridDefinition parses NUp grid dimensions into an internal structure.

func ParseNUpValue added in v0.1.21 

func ParseNUpValue(n int, nUp *NUp) error

ParseNUpValue parses the NUp value into an internal structure.

func Permissions 

func Permissions(ctx *Context) (list []string)

Permissions returns a list of set permissions.

func PropertiesAdd added in v0.3.2 

func PropertiesAdd(xRefTable *XRefTable, properties map[string]string) error

PropertiesAdd adds properties into the document info dict. Returns true if at least one property was added.

func PropertiesList added in v0.3.2 

func PropertiesList(xRefTable *XRefTable) ([]string, error)

PropertiesList returns a list of document properties as recorded in the document info dict.

func PropertiesRemove added in v0.3.2 

func PropertiesRemove(xRefTable *XRefTable, properties []string) (bool, error)

PropertiesRemove deletes specified properties. Returns true if at least one property was removed.

func RotatePages added in v0.1.20 

func RotatePages(ctx *Context, selectedPages IntSet, rotation int) error

RotatePages rotates all selected pages by a multiple of 90 degrees.

func SetFillColor added in v0.3.3 

func SetFillColor(w io.Writer, c SimpleColor)

SetFillColor sets the fill color.

func SetLineJoinStyle added in v0.3.3 

func SetLineJoinStyle(w io.Writer, s LineJoinStyle)

SetLineJoinStyle sets the line join style for stroking operations.

func SetLineWidth added in v0.3.3 

func SetLineWidth(w io.Writer, width float64)

SetLineWidth sets line width for stroking operations.

func SetStrokeColor added in v0.3.3 

func SetStrokeColor(w io.Writer, c SimpleColor)

SetStrokeColor sets the stroke color.

func StringLiteralToString 

func StringLiteralToString(s string) (string, error)

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

func Text added in v0.3.3 

func Text(o Object) (string, error)

Text returns a string based representation for String and Hexliterals.

func TimingStats added in v0.1.18 

func TimingStats(op string, durRead, durVal, durOpt, durWrite, durTotal float64)

TimingStats prints processing time stats for an operation.

func UTF8ToCP1252 added in v0.3.8 

func UTF8ToCP1252(s string) string

UTF8ToCP1252 converts UTF-8 to CP1252.

func Unescape 

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

Unescape resolves all escape sequences of s.

func ValidationTimingStats added in v0.1.18 

func ValidationTimingStats(dur1, dur2, dur float64)

ValidationTimingStats prints processing time stats for validation.

func Write added in v0.1.18 

func Write(ctx *Context) (err error)

Write generates a PDF file for the cross reference table contained in Context.

func WriteImage added in v0.1.16 

func WriteImage(xRefTable *XRefTable, fileName string, sd *StreamDict, objNr int) (string, error)

WriteImage writes a PDF image object to disk.

Types

type Array added in v0.1.16 

type Array []Object

Array represents a PDF array object.

func CIDWidths added in v0.3.7 

func CIDWidths(ttf font.TTFLight) Array

CIDWidths returns the value for W in a CIDFontDict.

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 added in v0.3.4 

func (a Array) Clone() Object

Clone returns a clone of a.

func (Array) PDFString added in v0.1.16 

func (a Array) PDFString() string

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

func (Array) String added in v0.1.16 

func (a Array) String() string

type Attachment added in v0.3.5 

type Attachment struct {
	io.Reader            // attachment data
	ID        string     // id
	FileName  string     // filename
	Desc      string     // description
	ModTime   *time.Time // time of last modification (optional)
}

Attachment is a Reader representing a PDF attachment.

func (Attachment) String added in v0.3.5 

func (a Attachment) String() string

type Bookmark added in v0.3.6 

type Bookmark struct {
	Title    string
	PageFrom int
	PageThru int // >= pageFrom and reaches until before pageFrom of the next bookmark.
	Children []Bookmark
	Parent   *Bookmark
}

Bookmark represents an outline item at some level including page span info.

type Boolean added in v0.1.16 

type Boolean bool

Boolean represents a PDF boolean object.

func (Boolean) Clone added in v0.3.4 

func (boolean Boolean) Clone() Object

Clone returns a clone of boolean.

func (Boolean) PDFString added in v0.1.16 

func (boolean Boolean) PDFString() string

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

func (Boolean) String added in v0.1.16 

func (boolean Boolean) String() string

func (Boolean) Value added in v0.1.16 

func (boolean Boolean) Value() bool

Value returns a bool value for this PDF object.

type Box added in v0.3.8 

type Box struct {
	Rect      *Rectangle // Rectangle in user space.
	Inherited bool       // Media box and Crop box may be inherited.
	RefBox    string     // Use position of another box,
	// Margins to parent box in points.
	// Relative to parent box if 0 < x < 0.5
	MLeft, MRight float64
	MTop, MBot    float64
	// Relative position within parent box
	Dim    *Dim   // dimensions
	Pos    anchor // position anchor within parent box, one of tl,tc,tr,l,c,r,bl,bc,br.
	Dx, Dy int    // anchor offset
}

Box is a rectangular region in user space expressed either explicitly via Rect or implicitly via margins applied to the containing parent box. Media box serves as parent box for crop box. Crop box serves as parent box for trim, bleed and art box.

func ParseBox added in v0.3.8 

func ParseBox(s string, u DisplayUnit) (*Box, error)

ParseBox parses a box definition.

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 CommandMode 

type CommandMode int

CommandMode specifies the operation being executed. 

const (
	VALIDATE CommandMode = iota
	OPTIMIZE
	SPLIT
	MERGECREATE
	MERGEAPPEND
	EXTRACTIMAGES
	EXTRACTFONTS
	EXTRACTPAGES
	EXTRACTCONTENT
	EXTRACTMETADATA
	TRIM
	ADDATTACHMENTS
	ADDATTACHMENTSPORTFOLIO
	REMOVEATTACHMENTS
	EXTRACTATTACHMENTS
	LISTATTACHMENTS
	SETPERMISSIONS
	LISTPERMISSIONS
	ENCRYPT
	DECRYPT
	CHANGEUPW
	CHANGEOPW
	ADDWATERMARKS
	REMOVEWATERMARKS
	IMPORTIMAGES
	INSERTPAGESBEFORE
	INSERTPAGESAFTER
	REMOVEPAGES
	ROTATE
	NUP
	BOOKLET
	INFO
	CHEATSHEETSFONTS
	INSTALLFONTS
	LISTFONTS
	LISTKEYWORDS
	ADDKEYWORDS
	REMOVEKEYWORDS
	LISTPROPERTIES
	ADDPROPERTIES
	REMOVEPROPERTIES
	COLLECT
	CROP
	LISTBOXES
	ADDBOXES
	REMOVEBOXES
)

The available commands.

type Configuration 

type Configuration struct {
	Path string

	// Enables PDF V1.5 compatible processing of object streams, xref streams, hybrid PDF files.
	Reader15 bool

	// Enables decoding of all streams (fontfiles, images..) for logging purposes.
	DecodeAllStreams bool

	// Validate against ISO-32000: strict or relaxed
	ValidationMode int

	// Check for broken links in LinkedAnnotations/URIActions.
	ValidateLinks bool

	// End of line char sequence for writing.
	Eol string

	// Turns on object stream generation.
	// A signal for compressing any new non-stream-object into an object stream.
	// true enforces WriteXRefStream to true.
	// false does not prevent xRefStream generation.
	WriteObjectStream bool

	// Switches between xRefSection (<=V1.4) and objectStream/xRefStream (>=V1.5) writing.
	WriteXRefStream bool

	// Turns on stats collection.
	// TODO Decision - unused.
	CollectStats bool

	// A CSV-filename holding the statistics.
	StatsFileName string

	// Supplied user password
	UserPW    string
	UserPWNew *string

	// Supplied owner password
	OwnerPW    string
	OwnerPWNew *string

	// EncryptUsingAES ensures AES encryption.
	// true: AES encryption
	// false: RC4 encryption.
	EncryptUsingAES bool

	// AES:40,128,256 RC4:40,128
	EncryptKeyLength int

	// Supplied user access permissions, see Table 22
	Permissions int16

	// Command being executed.
	Cmd CommandMode

	// Display unit in effect.
	Unit DisplayUnit
}

Configuration of a Context.

func NewAESConfiguration added in v0.2.3 

func NewAESConfiguration(userPW, ownerPW string, keyLength int) *Configuration

NewAESConfiguration returns a default configuration for AES encryption.

func NewDefaultConfiguration 

func NewDefaultConfiguration() *Configuration

NewDefaultConfiguration returns the default pdfcpu configuration.

func NewRC4Configuration added in v0.2.3 

func NewRC4Configuration(userPW, ownerPW string, keyLength int) *Configuration

NewRC4Configuration returns a default configuration for RC4 encryption.

func (*Configuration) ApplyReducedFeatureSet added in v0.3.3 

func (c *Configuration) ApplyReducedFeatureSet() bool

ApplyReducedFeatureSet returns true if complex entries like annotations shall not be written.

func (*Configuration) EolString added in v0.3.6 

func (c *Configuration) EolString() string

EolString returns a string rep for the eol in effect.

func (Configuration) String added in v0.3.6 

func (c Configuration) String() string

func (*Configuration) UnitString added in v0.3.8 

func (c *Configuration) UnitString() string

UnitString returns a string rep for the display unit in effect.

func (*Configuration) ValidationModeString 

func (c *Configuration) ValidationModeString() string

ValidationModeString returns a string rep for the validation mode in effect.

type Context added in v0.1.16 

type Context struct {
	*Configuration
	*XRefTable
	Read     *ReadContext
	Optimize *OptimizationContext
	Write    *WriteContext
	// contains filtered or unexported fields
}

Context represents an environment for processing PDF files.

func CollectPages added in v0.3.2 

func CollectPages(ctx *Context, collectedPages []int) (*Context, error)

CollectPages creates a new PDF Context for a custom PDF page sequence of the PDF represented by ctx.

func CreateContext added in v0.1.20 

func CreateContext(xRefTable *XRefTable, conf *Configuration) *Context

CreateContext creates a Context for given cross reference table and configuration.

func CreateContextWithXRefTable added in v0.1.20 

func CreateContextWithXRefTable(conf *Configuration, pageDim *Dim) (*Context, error)

CreateContextWithXRefTable creates a Context with an xRefTable without pages for given configuration.

func NewContext added in v0.1.16 

func NewContext(rs io.ReadSeeker, conf *Configuration) (*Context, error)

NewContext initializes a new Context.

func Read added in v0.1.18 

func Read(rs io.ReadSeeker, conf *Configuration) (*Context, error)

Read takes a readSeeker and generates a Context, an in-memory representation containing a cross reference table.

func ReadFile added in v0.1.18 

func ReadFile(inFile string, conf *Configuration) (*Context, error)

ReadFile reads in a PDF file and builds an internal structure holding its cross reference table aka the Context.

func (*Context) AddAttachment added in v0.3.5 

func (ctx *Context) AddAttachment(a Attachment, useCollection bool) error

AddAttachment adds a.

func (*Context) AddPageBoundaries added in v0.3.8 

func (ctx *Context) AddPageBoundaries(selectedPages IntSet, pb *PageBoundaries) error

AddPageBoundaries adds page boundaries specified by pb for selected pages.

func (*Context) AddWatermarks added in v0.3.8 

func (ctx *Context) AddWatermarks(selectedPages IntSet, wm *Watermark) error

AddWatermarks adds watermarks to all pages selected.

func (*Context) AddWatermarksMap added in v0.3.8 

func (ctx *Context) AddWatermarksMap(m map[int]*Watermark) error

AddWatermarksMap adds watermarks in m to corresponding pages.

func (*Context) AddWatermarksSliceMap added in v0.3.10 

func (ctx *Context) AddWatermarksSliceMap(m map[int][]*Watermark) error

AddWatermarksSliceMap adds watermarks in m to corresponding pages.

func (*Context) BookletFromPDF added in v0.3.9 

func (ctx *Context) BookletFromPDF(selectedPages IntSet, nup *NUp) error

BookletFromPDF creates a booklet version of the PDF represented by xRefTable.

func (*Context) BookmarksForOutline added in v0.3.10 

func (ctx *Context) BookmarksForOutline() ([]Bookmark, error)

BookmarksForOutline returns all of the bookmark information recursively.

func (*Context) BookmarksForOutlineItem added in v0.3.10 

func (ctx *Context) BookmarksForOutlineItem(item *IndirectRef, parent *Bookmark) ([]Bookmark, error)

BookmarksForOutlineItem returns the bookmarks tree for an outline item.

func (*Context) Crop added in v0.3.8 

func (ctx *Context) Crop(selectedPages IntSet, b *Box) error

Crop sets crop box for selected pages to b.

func (*Context) DetectPageTreeWatermarks added in v0.3.8 

func (ctx *Context) DetectPageTreeWatermarks() error

DetectPageTreeWatermarks checks xRefTable's page tree for watermarks and records the result to xRefTable.Watermarked.

func (*Context) DetectWatermarks added in v0.3.8 

func (ctx *Context) DetectWatermarks() error

DetectWatermarks checks ctx for watermarks and records the result to xRefTable.Watermarked.

func (*Context) ExtractAttachment added in v0.3.8 

func (ctx *Context) ExtractAttachment(a Attachment) (*Attachment, error)

ExtractAttachment extracts a fully populated attachment.

func (*Context) ExtractAttachments added in v0.3.5 

func (ctx *Context) ExtractAttachments(ids []string) ([]Attachment, error)

ExtractAttachments extracts attachments with id.

func (*Context) ExtractFont added in v0.3.5 

func (ctx *Context) ExtractFont(objNr int) (*Font, error)

ExtractFont extracts a font from font dict by objNr.

func (*Context) ExtractImage added in v0.3.5 

func (ctx *Context) ExtractImage(objNr int) (*Image, error)

ExtractImage extracts an image from image dict referenced by objNr. Supported imgTypes: FlateDecode, DCTDecode, JPXDecode

func (*Context) ExtractMetadata added in v0.3.5 

func (ctx *Context) ExtractMetadata() ([]Metadata, error)

ExtractMetadata returns all metadata of ctx.

func (*Context) ExtractPage added in v0.3.5 

func (ctx *Context) ExtractPage(pageNr int) (*Context, error)

ExtractPage extracts pageNr into a new single page context.

func (*Context) ExtractPageContent added in v0.3.5 

func (ctx *Context) ExtractPageContent(pageNr int) (io.Reader, error)

ExtractPageContent extracts the consolidated page content stream for pageNr.

func (*Context) ExtractPageFonts added in v0.3.5 

func (ctx *Context) ExtractPageFonts(pageNr int) ([]Font, error)

ExtractPageFonts extracts all fonts used by pageNr.

func (*Context) ExtractPageImages added in v0.3.5 

func (ctx *Context) ExtractPageImages(pageNr int) ([]Image, error)

ExtractPageImages extracts all images used by pageNr.

func (*Context) ExtractPages added in v0.3.6 

func (ctx *Context) ExtractPages(pageNrs []int, usePgCache bool) (*Context, error)

ExtractPages extracts pageNrs into a new single page context.

func (*Context) FontObjNrs added in v0.3.5 

func (ctx *Context) FontObjNrs(pageNr int) []int

FontObjNrs returns all font dict objNrs for pageNr. Requires an optimized context.

func (*Context) ImageObjNrs added in v0.3.5 

func (ctx *Context) ImageObjNrs(pageNr int) []int

ImageObjNrs returns all image dict objNrs for pageNr. Requires an optimized context.

func (*Context) InfoDigest added in v0.2.3 

func (ctx *Context) InfoDigest(selectedPages IntSet) ([]string, error)

InfoDigest returns info about ctx.

func (*Context) ListAttachments added in v0.3.5 

func (ctx *Context) ListAttachments() ([]Attachment, error)

ListAttachments returns a slice of attachment stubs (attachment w/o data).

func (*Context) ListPageBoundaries added in v0.3.8 

func (ctx *Context) ListPageBoundaries(selectedPages IntSet, wantPB *PageBoundaries) ([]string, error)

ListPageBoundaries lists page boundaries specified in wantPB for selected pages.

func (*Context) NUpFromPDF added in v0.3.8 

func (ctx *Context) NUpFromPDF(selectedPages IntSet, nup *NUp) error

NUpFromPDF creates an n-up version of the PDF represented by xRefTable.

func (*Context) PageObjFromDestinationArray added in v0.3.10 

func (ctx *Context) PageObjFromDestinationArray(dest Object) (*IndirectRef, error)

func (*Context) RemoveAttachment added in v0.3.8 

func (ctx *Context) RemoveAttachment(a Attachment) (bool, error)

RemoveAttachment removes a and returns true on success.

func (*Context) RemoveAttachments added in v0.3.5 

func (ctx *Context) RemoveAttachments(ids []string) (bool, error)

RemoveAttachments removes attachments with given id and returns true if anything removed.

func (*Context) RemovePageBoundaries added in v0.3.8 

func (ctx *Context) RemovePageBoundaries(selectedPages IntSet, pb *PageBoundaries) error

RemovePageBoundaries removes page boundaries specified by pb for selected pages. The media box is mandatory (inherited or not) and can't be removed. A removed crop box defaults to the media box. Removed trim/bleed/art boxes default to the crop box.

func (*Context) RemoveWatermarks added in v0.3.8 

func (ctx *Context) RemoveWatermarks(selectedPages IntSet) error

RemoveWatermarks removes watermarks for all pages selected.

func (*Context) ResetWriteContext added in v0.1.16 

func (ctx *Context) ResetWriteContext()

ResetWriteContext prepares an existing WriteContext for a new file to be written.

func (*Context) SearchEmbeddedFilesNameTreeNodeByContent added in v0.3.8 

func (ctx *Context) SearchEmbeddedFilesNameTreeNodeByContent(s string) (*string, Object, error)

SearchEmbeddedFilesNameTreeNodeByContent tries to identify a name tree by content.

func (*Context) String added in v0.1.16 

func (ctx *Context) String() string

type Dict added in v0.1.16 

type Dict map[string]Object

Dict represents a PDF dict object.

func NewDict added in v0.1.16 

func NewDict() Dict

NewDict returns a new PDFDict object.

func (Dict) ArrayEntry added in v0.1.16 

func (d Dict) ArrayEntry(key string) Array

ArrayEntry expects and returns a Array entry for given key.

func (Dict) BooleanEntry added in v0.1.16 

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

BooleanEntry expects and returns a BooleanEntry for given key.

func (Dict) Clone added in v0.3.4 

func (d Dict) Clone() Object

Clone returns a clone of d.

func (Dict) Delete added in v0.1.16 

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

Delete deletes the Object for given key.

func (Dict) DictEntry added in v0.1.16 

func (d Dict) DictEntry(key string) Dict

DictEntry expects and returns a PDFDict entry for given key.

func (Dict) Entry added in v0.1.16 

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

Entry returns the value for given key.

func (Dict) Find added in v0.1.16 

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

Find returns the Object for given key and PDFDict.

func (Dict) First added in v0.1.16 

func (d Dict) First() *int

First returns a *int for key "First".

func (Dict) HexLiteralEntry added in v0.1.16 

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

HexLiteralEntry returns a HexLiteral object for given key.

func (*Dict) Increment added in v0.1.20 

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

Increment increments the integer value for given key.

func (*Dict) IncrementBy added in v0.1.20 

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

IncrementBy increments the integer value for given key by i.

func (Dict) Index added in v0.1.16 

func (d Dict) Index() Array

Index returns a *Array for key "Index".

func (Dict) IndirectRefEntry added in v0.1.16 

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

IndirectRefEntry returns an indirectRefEntry for given key for this dictionary.

func (Dict) Insert added in v0.1.16 

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

Insert adds a new entry to this PDFDict.

func (Dict) InsertFloat added in v0.1.16 

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

InsertFloat adds a new float entry to this PDFDict.

func (Dict) InsertInt added in v0.1.16 

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

InsertInt adds a new int entry to this PDFDict.

func (Dict) InsertName added in v0.1.16 

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

InsertName adds a new name entry to this PDFDict.

func (Dict) InsertString added in v0.1.16 

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

InsertString adds a new string entry to this PDFDict.

func (Dict) Int64Entry added in v0.1.16 

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

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

func (Dict) IntEntry added in v0.1.16 

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

IntEntry expects and returns a Integer entry for given key.

func (Dict) IsLinearizationParmDict added in v0.1.16 

func (d Dict) IsLinearizationParmDict() bool

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

func (Dict) IsObjStm added in v0.1.16 

func (d Dict) IsObjStm() bool

IsObjStm returns true if given PDFDict is an object stream.

func (Dict) Len added in v0.1.16 

func (d Dict) Len() int

Len returns the length of this PDFDict.

func (Dict) Length added in v0.1.16 

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 added in v0.1.16 

func (d Dict) N() *int

N returns a *int for key "N".

func (Dict) NameEntry added in v0.1.16 

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

NameEntry expects and returns a Name entry for given key.

func (Dict) PDFString added in v0.1.16 

func (d Dict) PDFString() string

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

func (Dict) Prev added in v0.1.16 

func (d Dict) Prev() *int64

Prev returns the previous offset.

func (Dict) Size added in v0.1.16 

func (d Dict) Size() *int

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

func (Dict) StreamDictEntry added in v0.1.16 

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

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

func (Dict) String added in v0.1.16 

func (d Dict) String() string

func (Dict) StringEntry added in v0.1.16 

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

StringEntry expects and returns a StringLiteral entry for given key.

func (Dict) StringEntryBytes added in v0.1.16 

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

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

func (Dict) StringLiteralEntry added in v0.1.16 

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

StringLiteralEntry returns a StringLiteral object for given key.

func (Dict) Subtype added in v0.1.16 

func (d Dict) Subtype() *string

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

func (Dict) Type added in v0.1.16 

func (d Dict) Type() *string

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

func (Dict) Update added in v0.1.16 

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

Update modifies an existing entry of this PDFDict.

func (Dict) W added in v0.1.16 

func (d Dict) W() Array

W returns a *Array for key "W".

type Dim added in v0.2.4 

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 (Dim) AspectRatio added in v0.2.4 

func (d Dim) AspectRatio() float64

AspectRatio returns the relation between width and height.

func (Dim) Landscape added in v0.2.4 

func (d Dim) Landscape() bool

Landscape returns true if d is in landscape mode.

func (Dim) Portrait added in v0.2.4 

func (d Dim) Portrait() bool

Portrait returns true if d is in portrait mode.

func (Dim) String added in v0.2.4 

func (d Dim) String() string

func (Dim) ToCentimetres added in v0.2.4 

func (d Dim) ToCentimetres() Dim

ToCentimetres converts d to centimetres.

func (Dim) ToInches added in v0.2.4 

func (d Dim) ToInches() Dim

ToInches converts d to inches.

func (Dim) ToMillimetres added in v0.2.4 

func (d Dim) ToMillimetres() Dim

ToMillimetres converts d to centimetres.

type DisplayUnit added in v0.2.4 

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 Enc 

type Enc struct {
	O, U       []byte
	OE, UE     []byte
	Perms      []byte
	L, P, R, V int
	Emd        bool // encrypt meta data
	ID         []byte
}

Enc wraps around all defined encryption attributes.

type Float added in v0.1.16 

type Float float64

Float represents a PDF float object.

func (Float) Clone added in v0.3.4 

func (f Float) Clone() Object

Clone returns a clone of f.

func (Float) PDFString added in v0.1.16 

func (f Float) PDFString() string

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

func (Float) String added in v0.1.16 

func (f Float) String() string

func (Float) Value added in v0.1.16 

func (f Float) Value() float64

Value returns a float64 value for this PDF object.

type Font added in v0.3.5 

type Font struct {
	io.Reader
	Name string
	Type string
}

Font is a Reader representing an embedded font.

type FontMap added in v0.3.3 

type FontMap map[string]string

FontMap maps font resource ids to font names.

func (FontMap) EnsureKey added in v0.3.3 

func (fm FontMap) EnsureKey(fontName string) string

EnsureKey registers fontName with corresponding font resource id.

type FontObject 

type FontObject struct {
	ResourceNames []string
	Prefix        string
	FontName      string
	FontDict      Dict
	Data          []byte
	Extension     string
}

FontObject represents a font used in a PDF file.

func (*FontObject) AddResourceName 

func (fo *FontObject) AddResourceName(resourceName string)

AddResourceName adds a resourceName referring to this font.

func (FontObject) Embedded 

func (fo FontObject) Embedded() (embedded bool)

Embedded returns true if the font is embedded into this PDF file.

func (FontObject) Encoding 

func (fo FontObject) Encoding() string

Encoding returns the Encoding of this font.

func (FontObject) ResourceNamesString 

func (fo FontObject) ResourceNamesString() string

ResourceNamesString returns a string representation of all the resource names of this font.

func (FontObject) String 

func (fo FontObject) String() string

func (FontObject) SubType 

func (fo FontObject) SubType() string

SubType returns the SubType of this font.

type HAlignment added in v0.3.3 

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.

type HexLiteral added in v0.1.16 

type HexLiteral string

HexLiteral represents a PDF hex literal object.

func NewHexLiteral added in v0.2.3 

func NewHexLiteral(b []byte) HexLiteral

NewHexLiteral creates a new HexLiteral for b..

func (HexLiteral) Bytes added in v0.1.16 

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

Bytes returns the byte representation.

func (HexLiteral) Clone added in v0.3.4 

func (hexliteral HexLiteral) Clone() Object

Clone returns a clone of hexliteral.

func (HexLiteral) PDFString added in v0.1.16 

func (hexliteral HexLiteral) PDFString() string

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

func (HexLiteral) String added in v0.1.16 

func (hexliteral HexLiteral) String() string

func (HexLiteral) Value added in v0.1.16 

func (hexliteral HexLiteral) Value() string

Value returns a string value for this PDF object.

type Image added in v0.3.5 

type Image struct {
	io.Reader
	Name string // Resource name
	Type string // File type
}

Image is a Reader representing an image resource.

func RenderImage added in v0.3.5 

func RenderImage(xRefTable *XRefTable, sd *StreamDict, resourceName string, objNr int) (*Image, error)

RenderImage returns a reader for the encoded image bytes. for extract

type ImageObject 

type ImageObject struct {
	ResourceNames []string
	ImageDict     *StreamDict
}

ImageObject represents an image used in a PDF file.

func (*ImageObject) AddResourceName 

func (io *ImageObject) AddResourceName(resourceName string)

AddResourceName adds a resourceName to this imageObject's ResourceNames dict.

func (ImageObject) ResourceNamesString 

func (io ImageObject) ResourceNamesString() string

ResourceNamesString returns a string representation of the ResourceNames for this image.

type Import added in v0.1.20 

type Import struct {
	PageDim  *Dim        // page dimensions in display unit.
	PageSize string      // one of A0,A1,A2,A3,A4(=default),A5,A6,A7,A8,Letter,Legal,Ledger,Tabloid,Executive,ANSIC,ANSID,ANSIE.
	UserDim  bool        // true if one of dimensions or paperSize provided overriding the default.
	DPI      int         // destination resolution to apply in dots per inch.
	Pos      anchor      // position anchor, one of tl,tc,tr,l,c,r,bl,bc,br,full.
	Dx, Dy   int         // anchor offset.
	Scale    float64     // relative scale factor. 0 <= x <= 1
	ScaleAbs bool        // true for absolute scaling.
	InpUnit  DisplayUnit // input display unit.
	Gray     bool        // true for rendering in Gray.
	Sepia    bool
	BgColor  *SimpleColor // background color
}

Import represents the command details for the command "ImportImage".

func DefaultImportConfig added in v0.1.20 

func DefaultImportConfig() *Import

DefaultImportConfig returns the default configuration.

func ParseImportDetails added in v0.1.20 

func ParseImportDetails(s string, u DisplayUnit) (*Import, error)

ParseImportDetails parses an Import command string into an internal structure.

func (Import) String added in v0.1.20 

func (imp Import) String() string

type IndirectRef added in v0.1.16 

type IndirectRef struct {
	ObjectNumber     Integer
	GenerationNumber Integer
}

IndirectRef represents a PDF indirect object.

func CIDFontDescriptor added in v0.3.3 

func CIDFontDescriptor(xRefTable *XRefTable, ttf font.TTFLight, fontName, baseFontName string) (*IndirectRef, error)

CIDFontDescriptor represents a font descriptor describing the CIDFont’s default metrics other than its glyph widths.

func CIDFontDict added in v0.3.3 

func CIDFontDict(xRefTable *XRefTable, ttf font.TTFLight, fontName, baseFontName string) (*IndirectRef, error)

CIDFontDict returns the descendant font dict for Type0 fonts.

func NewIndirectRef added in v0.1.16 

func NewIndirectRef(objectNumber, generationNumber int) *IndirectRef

NewIndirectRef returns a new PDFIndirectRef object.

func NewNUpPageForImage added in v0.1.21 

func NewNUpPageForImage(xRefTable *XRefTable, fileName string, parentIndRef *IndirectRef, nup *NUp) (*IndirectRef, error)

NewNUpPageForImage creates a new page dict in xRefTable for given image filename and n-up conf.

func NewPageForImage added in v0.1.20 

func NewPageForImage(xRefTable *XRefTable, r io.Reader, parentIndRef *IndirectRef, imp *Import) (*IndirectRef, error)

NewPageForImage creates a new page dict in xRefTable for given image reader r.

func (IndirectRef) Clone added in v0.3.4 

func (ir IndirectRef) Clone() Object

Clone returns a clone of ir.

func (IndirectRef) Equals added in v0.1.16 

func (ir IndirectRef) Equals(indRef IndirectRef) bool

Equals returns true if two indirect References refer to the same object.

func (IndirectRef) PDFString added in v0.1.16 

func (ir IndirectRef) PDFString() string

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

func (IndirectRef) String added in v0.1.16 

func (ir IndirectRef) String() string

type InheritedPageAttrs added in v0.1.16 

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

InheritedPageAttrs represents all inherited page attributes.

type IntSet 

type IntSet map[int]bool

IntSet is a set of integers.

type Integer added in v0.1.16 

type Integer int

Integer represents a PDF integer object.

func (Integer) Clone added in v0.3.4 

func (i Integer) Clone() Object

Clone returns a clone of i.

func (Integer) PDFString added in v0.1.16 

func (i Integer) PDFString() string

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

func (Integer) String added in v0.1.16 

func (i Integer) String() string

func (Integer) Value added in v0.1.16 

func (i Integer) Value() int

Value returns an int value for this PDF object.

type LineJoinStyle added in v0.3.3 

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 Metadata added in v0.3.5 

type Metadata struct {
	io.Reader          // metadata
	ObjNr       int    // metadata dict objNr
	ParentObjNr int    // container object number
	ParentType  string // container dict type
}

Metadata is a Reader representing a metadata dict.

type NUp added in v0.1.21 

type NUp struct {
	PageDim       *Dim         // Page dimensions in display unit.
	PageSize      string       // Paper size eg. A4L, A4P, A4(=default=A4P), see paperSize.go
	UserDim       bool         // true if one of dimensions or paperSize provided overriding the default.
	Orient        orientation  // One of rd(=default),dr,ld,dl
	Grid          *Dim         // Intra page grid dimensions eg (2,2)
	PageGrid      bool         // Create a mxn grid of pages for PDF inputfiles only (think "extra page n-Up").
	ImgInputFile  bool         // Process image or PDF input files.
	Margin        int          // Cropbox for n-Up content.
	Border        bool         // Draw bounding box.
	BookletGuides bool         // Draw folding and cutting lines.
	MultiFolio    bool         // Render booklet as sequence of folios.
	FolioSize     int          // Booklet multifolio folio size: default: 8
	InpUnit       DisplayUnit  // input display unit.
	BgColor       *SimpleColor // background color
}

NUp represents the command details for the command "NUp".

func DefaultBookletConfig added in v0.3.9 

func DefaultBookletConfig() *NUp

DefaultBookletConfig returns the default configuration for a booklet

func DefaultNUpConfig added in v0.1.21 

func DefaultNUpConfig() *NUp

DefaultNUpConfig returns the default NUp configuration.

func ImageBookletConfig added in v0.3.9 

func ImageBookletConfig(val int, desc string) (*NUp, error)

ImageBookletConfig returns an NUp configuration for booklet-ing image files.

func ImageGridConfig added in v0.2.3 

func ImageGridConfig(rows, cols int, desc string) (*NUp, error)

ImageGridConfig returns a grid configuration for Nup-ing image files.

func ImageNUpConfig added in v0.2.3 

func ImageNUpConfig(val int, desc string) (*NUp, error)

ImageNUpConfig returns an NUp configuration for Nup-ing image files.

func PDFBookletConfig added in v0.3.9 

func PDFBookletConfig(val int, desc string) (*NUp, error)

PDFBookletConfig returns an NUp configuration for booklet-ing PDF files.

func PDFGridConfig added in v0.2.3 

func PDFGridConfig(rows, cols int, desc string) (*NUp, error)

PDFGridConfig returns a grid configuration for Nup-ing PDF files.

func PDFNUpConfig added in v0.2.3 

func PDFNUpConfig(val int, desc string) (*NUp, error)

PDFNUpConfig returns an NUp configuration for Nup-ing PDF files.

func (NUp) N added in v0.3.9 

func (nup NUp) N() int

N returns the nUp value.

func (NUp) String added in v0.1.21 

func (nup NUp) String() string

type Name added in v0.1.16 

type Name string

Name represents a PDF name object.

func (Name) Clone added in v0.3.4 

func (nameObject Name) Clone() Object

Clone returns a clone of nameObject.

func (Name) PDFString added in v0.1.16 

func (nameObject Name) PDFString() string

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

func (Name) String added in v0.1.16 

func (nameObject Name) String() string

func (Name) Value added in v0.1.16 

func (nameObject Name) Value() string

Value returns a string value for this PDF object.

type Node 

type Node struct {
	Kids       []*Node // Mirror of the name tree's Kids array, an array of indirect references.
	Names      []entry // Mirror of the name tree's Names array.
	Kmin, Kmax string  // Mirror of the name tree's Limit array[Kmin,Kmax].
	D          Dict    // The PDF dict representing this name tree node.
}

Node is an opinionated implementation of the PDF name tree. pdfcpu caches all name trees found in the PDF catalog with this data structure. The PDF spec does not impose any rules regarding a strategy for the creation of nodes. A binary tree was chosen where each leaf node has a limited number of entries (maxEntries). Once maxEntries has been reached a leaf node turns into an intermediary node with two kids, which are leaf nodes each of them holding half of the sorted entries of the original leaf node.

func (*Node) Add 

func (n *Node) Add(xRefTable *XRefTable, k string, v Object) error

Add adds an entry to a name tree.

func (*Node) AddToLeaf 

func (n *Node) AddToLeaf(k string, v Object)

AddToLeaf adds an entry to a leaf.

func (*Node) HandleLeaf added in v0.3.6 

func (n *Node) HandleLeaf(xRefTable *XRefTable, k string, v Object) error

HandleLeaf processes a leaf node.

func (Node) KeyList 

func (n Node) KeyList() ([]string, error)

KeyList returns a sorted list of all keys.

func (Node) Process 

func (n Node) Process(xRefTable *XRefTable, handler func(*XRefTable, string, Object) error) error

Process traverses the nametree applying a handler to each entry (key-value pair).

func (*Node) Remove 

func (n *Node) Remove(xRefTable *XRefTable, k string) (empty, ok bool, err error)

Remove removes an entry from a name tree. empty returns true if this node is an empty leaf node after removal. ok returns true if removal was successful.

func (Node) String 

func (n Node) String() string

func (Node) Value 

func (n Node) Value(k string) (Object, bool)

Value returns the value for given key

type Object added in v0.1.16 

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

Object defines an interface for all Objects.

func ParseObject added in v0.1.16 

func ParseObject(ctx *Context, offset int64, objNr, genNr int) (Object, error)

ParseObject parses an object from file at given offset.

type ObjectStreamDict added in v0.1.16 

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

ObjectStreamDict represents a object stream dictionary.

func NewObjectStreamDict added in v0.1.16 

func NewObjectStreamDict() *ObjectStreamDict

NewObjectStreamDict creates a new ObjectStreamDict object.

func (*ObjectStreamDict) AddObject added in v0.1.16 

func (osd *ObjectStreamDict) AddObject(objNumber int, entry *XRefTableEntry) error

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

func (*ObjectStreamDict) Finalize added in v0.1.16 

func (osd *ObjectStreamDict) Finalize()

Finalize prepares the final content of the objectstream.

func (*ObjectStreamDict) IndexedObject added in v0.1.16 

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

IndexedObject returns the object at given index from a ObjectStreamDict.

type OptimizationContext 

type OptimizationContext struct {

	// Font section
	PageFonts         []IntSet            // For each page a registry of font object numbers.
	FontObjects       map[int]*FontObject // FontObject lookup table by font object number.
	Fonts             map[string][]int    // All font object numbers registered for a font name.
	DuplicateFonts    map[int]Dict        // Registry of duplicate font dicts.
	DuplicateFontObjs IntSet              // The set of objects that represents the union of the object graphs of all duplicate font dicts.

	// Image section
	PageImages         []IntSet             // For each page a registry of image object numbers.
	ImageObjects       map[int]*ImageObject // ImageObject lookup table by image object number.
	DuplicateImages    map[int]*StreamDict  // Registry of duplicate image dicts.
	DuplicateImageObjs IntSet               // The set of objects that represents the union of the object graphs of all duplicate image dicts.

	DuplicateInfoObjects IntSet // Possible result of manual info dict modification.
	NonReferencedObjs    []int  // Objects that are not referenced.

	Cache     map[int]bool // For visited objects during optimization.
	NullObjNr *int         // objNr of a regular null object, to be used for fixing references to free objects.
}

OptimizationContext represents the context for the optimiziation of a PDF file.

func (*OptimizationContext) DuplicateFontObjectsString 

func (oc *OptimizationContext) DuplicateFontObjectsString() (int, string)

DuplicateFontObjectsString returns a formatted string and the number of objs.

func (*OptimizationContext) DuplicateImageObjectsString 

func (oc *OptimizationContext) DuplicateImageObjectsString() (int, string)

DuplicateImageObjectsString returns a formatted string and the number of objs.

func (*OptimizationContext) DuplicateInfoObjectsString 

func (oc *OptimizationContext) DuplicateInfoObjectsString() (int, string)

DuplicateInfoObjectsString returns a formatted string and the number of objs.

func (*OptimizationContext) IsDuplicateFontObject 

func (oc *OptimizationContext) IsDuplicateFontObject(i int) bool

IsDuplicateFontObject returns true if object #i is a duplicate font object.

func (*OptimizationContext) IsDuplicateImageObject 

func (oc *OptimizationContext) IsDuplicateImageObject(i int) bool

IsDuplicateImageObject returns true if object #i is a duplicate image object.

func (*OptimizationContext) IsDuplicateInfoObject 

func (oc *OptimizationContext) IsDuplicateInfoObject(i int) bool

IsDuplicateInfoObject returns true if object #i is a duplicate info object.

func (*OptimizationContext) NonReferencedObjsString 

func (oc *OptimizationContext) NonReferencedObjsString() (int, string)

NonReferencedObjsString returns a formatted string and the number of objs.

type PDFFilter 

type PDFFilter struct {
	Name        string
	DecodeParms Dict
}

PDFFilter represents a PDF stream filter object.

type PDFImage added in v0.1.16 

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

PDFImage represents a XObject of subtype image.

type PDFStats 

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

PDFStats is a container for stats.

func NewPDFStats 

func NewPDFStats() PDFStats

NewPDFStats returns a new PDFStats object.

func (PDFStats) AddPageAttr 

func (stats PDFStats) AddPageAttr(name int)

AddPageAttr adds the occurrence of a field with given name to the pageAttrs set.

func (PDFStats) AddRootAttr 

func (stats PDFStats) AddRootAttr(name int)

AddRootAttr adds the occurrence of a field with given name to the rootAttrs set.

func (PDFStats) UsesPageAttr 

func (stats PDFStats) UsesPageAttr(name int) bool

UsesPageAttr returns true if a field with given name is contained in the pageAttrs set.

func (PDFStats) UsesRootAttr 

func (stats PDFStats) UsesRootAttr(name int) bool

UsesRootAttr returns true if a field with given name is contained in the rootAttrs set.

type Page added in v0.3.3 

type Page struct {
	MediaBox *Rectangle
	Fm       FontMap
	Buf      *bytes.Buffer
}

Page represents rendered page content.

func NewPage added in v0.3.3 

func NewPage(mediaBox *Rectangle) Page

NewPage creates a page for a mediaBox.

func NewPageWithBg added in v0.3.3 

func NewPageWithBg(mediaBox *Rectangle, c SimpleColor) Page

NewPageWithBg creates a page for a mediaBox.

type PageBoundaries added in v0.3.8 

type PageBoundaries struct {
	Media, Crop, Trim, Bleed, Art *Box
}

PageBoundaries represent the defined PDF page boundaries.

func ParseBoxList added in v0.3.8 

func ParseBoxList(s string) (*PageBoundaries, error)

ParseBoxList parses a list of box types.

func ParsePageBoundaries added in v0.3.8 

func ParsePageBoundaries(s string, unit DisplayUnit) (*PageBoundaries, error)

ParsePageBoundaries parses a list of box definitions and assignments.

func (PageBoundaries) ArtBox added in v0.3.8 

func (pb PageBoundaries) ArtBox() *Rectangle

ArtBox returns the effective artbox for pb.

func (PageBoundaries) BleedBox added in v0.3.8 

func (pb PageBoundaries) BleedBox() *Rectangle

BleedBox returns the effective bleedbox for pb.

func (PageBoundaries) CropBox added in v0.3.8 

func (pb PageBoundaries) CropBox() *Rectangle

CropBox returns the effective cropbox for pb.

func (PageBoundaries) MediaBox added in v0.3.8 

func (pb PageBoundaries) MediaBox() *Rectangle

MediaBox returns the effective mediabox for pb.

func (*PageBoundaries) ResolveBox added in v0.3.8 

func (pb *PageBoundaries) ResolveBox(s string) error

ResolveBox resolves s and tries to assign an empty page boundary.

func (*PageBoundaries) SelectAll added in v0.3.8 

func (pb *PageBoundaries) SelectAll()

SelectAll selects all page boundaries.

func (PageBoundaries) String added in v0.3.8 

func (pb PageBoundaries) String() string

func (PageBoundaries) TrimBox added in v0.3.8 

func (pb PageBoundaries) TrimBox() *Rectangle

TrimBox returns the effective trimbox for pb.

type PageResourceNames added in v0.3.4 

type PageResourceNames map[string]StringSet

PageResourceNames represents the required resource names for a specific page as extracted from its content streams.

func NewPageResourceNames added in v0.3.4 

func NewPageResourceNames() PageResourceNames

NewPageResourceNames returns initialized pageResourceNames.

func (PageResourceNames) HasContent added in v0.3.4 

func (prn PageResourceNames) HasContent() bool

HasContent returns true in any resource names present.

func (PageResourceNames) HasResources added in v0.3.4 

func (prn PageResourceNames) HasResources(s string) bool

HasResources returns true for any resource names present in resource subDict s.

func (PageResourceNames) Resources added in v0.3.4 

func (prn PageResourceNames) Resources(s string) StringSet

Resources returns a set of all required resource names for subdict s.

func (PageResourceNames) String added in v0.3.4 

func (prn PageResourceNames) String() string

type Point added in v0.1.21 

type Point struct {
	X, Y float64
}

Point represents a user space location.

type ReadContext 

type ReadContext struct {
	FileName string // Input PDF-File.
	FileSize int64  // Input file size.

	EolCount            int    // 1 or 2 characters used for eol.
	BinaryTotalSize     int64  // total stream data
	BinaryImageSize     int64  // total image stream data
	BinaryFontSize      int64  // total font stream data (fontfiles)
	BinaryImageDuplSize int64  // total obsolet image stream data after optimization
	BinaryFontDuplSize  int64  // total obsolet font stream data after optimization
	Linearized          bool   // File is linearized.
	Hybrid              bool   // File is a hybrid PDF file.
	UsingObjectStreams  bool   // File is using object streams.
	ObjectStreams       IntSet // All object numbers of any object streams found which need to be decoded.
	UsingXRefStreams    bool   // File is using xref streams.
	XRefStreams         IntSet // All object numbers of any xref streams found.
	// contains filtered or unexported fields
}

ReadContext represents the context for reading a PDF file.

func (*ReadContext) IsObjectStreamObject 

func (rc *ReadContext) IsObjectStreamObject(i int) bool

IsObjectStreamObject returns true if object i is a an object stream. All compressed objects are object streams.

func (*ReadContext) IsXRefStreamObject 

func (rc *ReadContext) IsXRefStreamObject(i int) bool

IsXRefStreamObject returns true if object #i is a an xref stream.

func (*ReadContext) LogStats 

func (rc *ReadContext) LogStats(optimized bool)

LogStats logs stats for read file.

func (*ReadContext) ObjectStreamsString 

func (rc *ReadContext) ObjectStreamsString() (int, string)

ObjectStreamsString returns a formatted string and the number of object stream objects.

func (*ReadContext) ReadFileSize added in v0.1.16 

func (rc *ReadContext) ReadFileSize() int

ReadFileSize returns the size of the input file, if there is one.

func (*ReadContext) XRefStreamsString 

func (rc *ReadContext) XRefStreamsString() (int, string)

XRefStreamsString returns a formatted string and the number of xref stream objects.

type Rectangle added in v0.1.21 

type Rectangle struct {
	*types.Rectangle
}

Rectangle represents a rectangular region in userspace.

func Rect added in v0.1.21 

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

Rect returns a new rectangle for given lower left and upper right corners.

func RectForArray added in v0.1.21 

func RectForArray(a Array) *Rectangle

RectForArray returns a new rectangle for given Array.

func RectForDim added in v0.1.21 

func RectForDim(width, height float64) *Rectangle

RectForDim returns a new rectangle for given dimensions.

func RectForFormat added in v0.1.21 

func RectForFormat(f string) *Rectangle

RectForFormat returns a new rectangle for given format.

func RectForWidthAndHeight added in v0.3.3 

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

RectForWidthAndHeight returns a new rectangle for given dimensions.

func WriteColumn added in v0.3.3 

func WriteColumn(w io.Writer, mediaBox, region *Rectangle, td TextDescriptor, width float64) *Rectangle

WriteColumn writes a text column using s at position x/y using a certain font, fontsize and a desired horizontal and vertical alignment. Enforce a desired column width by supplying a width > 0 (especially useful for justified text). It returns the bounding box of this column.

func WriteColumnAnchored added in v0.3.3 

func WriteColumnAnchored(w io.Writer, mediaBox, region *Rectangle, td TextDescriptor, a anchor, width float64) *Rectangle

WriteColumnAnchored writes a justified text column with anchored position and returns its bounding box.

func WriteMultiLine added in v0.3.3 

func WriteMultiLine(w io.Writer, mediaBox, region *Rectangle, td TextDescriptor) *Rectangle

WriteMultiLine writes s at position x/y using a certain font, fontsize and a desired horizontal and vertical alignment. It returns the bounding box of this text column.

func WriteMultiLineAnchored added in v0.3.3 

func WriteMultiLineAnchored(w io.Writer, mediaBox, region *Rectangle, td TextDescriptor, a anchor) *Rectangle

WriteMultiLineAnchored writes multiple lines with anchored position and returns its bounding box.

func (Rectangle) Array added in v0.1.21 

func (r Rectangle) Array() Array

Array returns the PDF representation of a rectangle.

func (Rectangle) CroppedCopy added in v0.1.21 

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

CroppedCopy returns a copy of r with applied margin..

func (Rectangle) Dimensions added in v0.3.8 

func (r Rectangle) Dimensions() Dim

Dimensions returns r's dimensions.

func (Rectangle) FitsWithin added in v0.1.21 

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

FitsWithin returns true if rectangle r fits within rectangle r2.

func (Rectangle) Format added in v0.3.8 

func (r Rectangle) Format(unit DisplayUnit) string

Format returns r's details converted into unit.

func (Rectangle) ScaledHeight added in v0.1.21 

func (r Rectangle) ScaledHeight(w float64) float64

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

func (Rectangle) ScaledWidth added in v0.1.21 

func (r Rectangle) ScaledWidth(h float64) float64

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

func (*Rectangle) Translate added in v0.3.3 

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

Translate moves r by dx and dy.

type RenderMode added in v0.3.3 

type RenderMode int

RenderMode represents the text rendering mode (see 9.3.6) 

const (
	RMFill RenderMode = iota
	RMStroke
	RMFillAndStroke
)

Render mode

type SimpleColor added in v0.2.3 

type SimpleColor struct {
	R, G, B float32 // intensities between 0 and 1.
}

SimpleColor is a simple rgb wrapper.

func NewSimpleColor added in v0.3.3 

func NewSimpleColor(rgb uint32) SimpleColor

NewSimpleColor returns a SimpleColor for rgb in the form 0x00RRGGBB

func (SimpleColor) String added in v0.2.3 

func (sc SimpleColor) String() string

type StreamDict added in v0.1.16 

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

StreamDict represents a PDF stream dict object.

func NewStreamDict added in v0.1.16 

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 added in v0.3.4 

func (sd StreamDict) Clone() Object

Clone returns a clone of sd.

func (*StreamDict) Decode added in v0.3.6 

func (sd *StreamDict) Decode() error

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

func (*StreamDict) Encode added in v0.3.6 

func (sd *StreamDict) Encode() error

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

func (StreamDict) HasSoleFilterNamed added in v0.1.16 

func (sd StreamDict) HasSoleFilterNamed(filterName string) bool

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

type StringLiteral added in v0.1.16 

type StringLiteral string

StringLiteral represents a PDF string literal object.

func (StringLiteral) Clone added in v0.3.4 

func (stringliteral StringLiteral) Clone() Object

Clone returns a clone of stringLiteral.

func (StringLiteral) PDFString added in v0.1.16 

func (stringliteral StringLiteral) PDFString() string

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

func (StringLiteral) String added in v0.1.16 

func (stringliteral StringLiteral) String() string

func (StringLiteral) Value added in v0.1.16 

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 added in v0.3.4 

func NewStringSet(slice []string) StringSet

NewStringSet returns a new StringSet for slice.

type TextDescriptor added in v0.3.3 

type TextDescriptor struct {
	Text           string        // A multi line string using \n for line breaks.
	FontName       string        // Name of the core or user font to be used.
	RTL            bool          // Right to left user font.
	FontKey        string        // Resource id registered for FontName.
	FontSize       int           // Fontsize in points.
	X, Y           float64       // Position of first char's baseline.
	Dx, Dy         float64       // Horizontal and vertical offsets for X,Y.
	MTop, MBot     float64       // Top and bottom margins applied to text bounding box.
	MLeft, MRight  float64       // Left and right margins applied to text bounding box.
	MinHeight      float64       // The minimum height of this text's bounding box.
	Rotation       float64       // 0..360 degree rotation angle.
	ScaleAbs       bool          // Scaling type, true=absolute, false=relative to container dimensions.
	Scale          float64       // font scaling factor > 0 (<= 1 for relative scaling).
	HAlign         HAlignment    // Horizontal text alignment.
	VAlign         VAlignment    // Vertical text alignment.
	RMode          RenderMode    // Text render mode
	StrokeCol      SimpleColor   // Stroke color to be used for rendering text corresponding to RMode.
	FillCol        SimpleColor   // Fill color to be used for rendering text corresponding to RMode.
	ShowTextBB     bool          // Render bounding box including BackgroundCol, border and margins.
	ShowBackground bool          // Render background of bounding box using BackgroundCol.
	BackgroundCol  SimpleColor   // Bounding box fill color.
	ShowBorder     bool          // Render border using BorderCol, BorderWidth and BorderStyle.
	BorderWidth    float64       // Border width, visibility depends on ShowBorder.
	BorderStyle    LineJoinStyle // Border style, also visible if ShowBorder is false as long as ShowBackground is true.
	BorderCol      SimpleColor   // Border color.
	ParIndent      bool          // Indent first line of paragraphs or space between paragraphs.
	ShowLineBB     bool          // Render line bounding boxes in black (for HAlign != AlignJustify only)
	ShowMargins    bool          // Render all margins in light gray.
	HairCross      bool          // Draw haircross at X,Y.
}

TextDescriptor contains all attributes needed for rendering a text column in PDF user space.

type VAlignment added in v0.3.3 

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 Version 

type Version int

Version is a type for the internal representation of PDF versions. 

const (
	V10 Version = iota
	V11
	V12
	V13
	V14
	V15
	V16
	V17
)

Constants for all PDF versions up to v1.7

func PDFVersion 

func PDFVersion(versionStr string) (Version, error)

PDFVersion returns the PDFVersion for a version string.

func (Version) String added in v0.1.16 

func (v Version) String() string

String returns a string representation for a given PDFVersion.

type Watermark added in v0.1.16 

type Watermark struct {
	// configuration
	Mode              int           // WMText, WMImage or WMPDF
	TextString        string        // raw display text.
	TextLines         []string      // display multiple lines of text.
	FileName          string        // display pdf page or png image.
	Page              int           // the page number of a PDF file. 0 means multistamp/multiwatermark.
	OnTop             bool          // if true this is a STAMP else this is a WATERMARK.
	InpUnit           DisplayUnit   // input display unit.
	Pos               anchor        // position anchor, one of tl,tc,tr,l,c,r,bl,bc,br.
	Dx, Dy            int           // anchor offset.
	HAlign            *HAlignment   // horizonal alignment for text watermarks.
	FontName          string        // supported are Adobe base fonts only. (as of now: Helvetica, Times-Roman, Courier)
	FontSize          int           // font scaling factor.
	ScaledFontSize    int           // font scaling factor for a specific page
	RTL               bool          // if true, render text from right to left
	Color             SimpleColor   // text fill color(=non stroking color) for backwards compatibility.
	FillColor         SimpleColor   // text fill color(=non stroking color).
	StrokeColor       SimpleColor   // text stroking color
	BgColor           *SimpleColor  // text bounding box background color
	MLeft, MRight     int           // left and right bounding box margin
	MTop, MBot        int           // top and bottom bounding box margin
	BorderWidth       int           // Border width, visible if BgColor is set.
	BorderStyle       LineJoinStyle // Border style (bounding box corner style), visible if BgColor is set.
	BorderColor       *SimpleColor  // border color
	Rotation          float64       // rotation to apply in degrees. -180 <= x <= 180
	Diagonal          int           // paint along the diagonal.
	UserRotOrDiagonal bool          // true if one of rotation or diagonal provided overriding the default.
	Opacity           float64       // opacity of the watermark. 0 <= x <= 1
	RenderMode        RenderMode    // fill=0, stroke=1 fill&stroke=2
	Scale             float64       // relative scale factor: 0 <= x <= 1, absolute scale factor: 0 <= x
	ScaleEff          float64       // effective scale factor
	ScaleAbs          bool          // true for absolute scaling.
	Update            bool          // true for updating instead of adding a page watermark.
	// contains filtered or unexported fields
}

Watermark represents the basic structure and command details for the commands "Stamp" and "Watermark".

func DefaultWatermarkConfig added in v0.2.5 

func DefaultWatermarkConfig() *Watermark

DefaultWatermarkConfig returns the default configuration.

func ParseImageWatermarkDetails added in v0.3.1 

func ParseImageWatermarkDetails(fileName, desc string, onTop bool, u DisplayUnit) (*Watermark, error)

ParseImageWatermarkDetails parses a text Watermark/Stamp command string into an internal structure.

func ParsePDFWatermarkDetails added in v0.3.1 

func ParsePDFWatermarkDetails(fileName, desc string, onTop bool, u DisplayUnit) (*Watermark, error)

ParsePDFWatermarkDetails parses a text Watermark/Stamp command string into an internal structure.

func ParseTextWatermarkDetails added in v0.3.1 

func ParseTextWatermarkDetails(text, desc string, onTop bool, u DisplayUnit) (*Watermark, error)

ParseTextWatermarkDetails parses a text Watermark/Stamp command string into an internal structure.

func (Watermark) OnTopString added in v0.1.16 

func (wm Watermark) OnTopString() string

OnTopString returns "watermark" or "stamp" whichever applies.

func (Watermark) String added in v0.1.16 

func (wm Watermark) String() string

type WriteContext 

type WriteContext struct {

	// The PDF-File which gets generated.
	*bufio.Writer                     // A writer associated with Fp.
	Fp                  *os.File      // A file pointer needed for detecting FileSize.
	FileSize            int64         // The size of the written file.
	DirName             string        // The output directory.
	FileName            string        // The output file name.
	SelectedPages       IntSet        // For split, trim and extract.
	BinaryTotalSize     int64         // total stream data, counts 100% all stream data written.
	BinaryImageSize     int64         // total image stream data written = Read.BinaryImageSize.
	BinaryFontSize      int64         // total font stream data (fontfiles) = copy of Read.BinaryFontSize.
	Table               map[int]int64 // object write offsets
	Offset              int64         // current write offset
	WriteToObjectStream bool          // if true start to embed objects into object streams and obey ObjectStreamMaxObjects.
	CurrentObjStream    *int          // if not nil, any new non-stream-object gets added to the object stream with this object number.
	Eol                 string        // end of line char sequence
}

WriteContext represents the context for writing a PDF file.

func NewWriteContext 

func NewWriteContext(eol string) *WriteContext

NewWriteContext returns a new WriteContext.

func (*WriteContext) HasWriteOffset 

func (wc *WriteContext) HasWriteOffset(objNumber int) bool

HasWriteOffset returns true if an object has already been written to PDFDestination.

func (*WriteContext) LogStats 

func (wc *WriteContext) LogStats()

LogStats logs stats for written file.

func (*WriteContext) SetWriteOffset 

func (wc *WriteContext) SetWriteOffset(objNumber int)

SetWriteOffset saves the current write offset to the PDFDestination.

func (*WriteContext) WriteEol 

func (wc *WriteContext) WriteEol() error

WriteEol writes an end of line sequence.

type XRefStreamDict added in v0.1.16 

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

XRefStreamDict represents a cross reference stream dictionary.

func NewXRefStreamDict added in v0.1.16 

func NewXRefStreamDict(ctx *Context) *XRefStreamDict

NewXRefStreamDict creates a new PDFXRefStreamDict object.

type XRefTable 

type XRefTable struct {
	Table               map[int]*XRefTableEntry
	Size                *int             // Object count from PDF trailer dict.
	PageCount           int              // Number of pages.
	Root                *IndirectRef     // Pointer to catalog (reference to root object).
	RootDict            Dict             // Catalog
	Names               map[string]*Node // Cache for name trees as found in catalog.
	Encrypt             *IndirectRef     // Encrypt dict.
	E                   *Enc
	EncKey              []byte // Encrypt key.
	AES4Strings         bool
	AES4Streams         bool
	AES4EmbeddedStreams bool

	// PDF Version
	HeaderVersion *Version // The PDF version the source is claiming to us as per its header.
	RootVersion   *Version // Optional PDF version taking precedence over the header version.

	// Document information section
	ID           Array        // from trailer
	Info         *IndirectRef // Infodict (reference to info dict object)
	Title        string
	Subject      string
	Keywords     string
	Author       string
	Creator      string
	Producer     string
	CreationDate string
	ModDate      string
	Properties   map[string]string

	// Linearization section (not yet supported)
	OffsetPrimaryHintTable  *int64
	OffsetOverflowHintTable *int64
	LinearizationObjs       IntSet

	// Offspec section
	AdditionalStreams *Array // array of IndirectRef - trailer :e.g., Oasis "Open Doc"

	// Statistics
	Stats PDFStats

	Tagged bool // File is using tags. This is important for ???

	// Validation
	CurPage        int                       // current page during validation
	CurObj         int                       // current object during validation, the last dereferenced object
	ValidationMode int                       // see Configuration
	ValidateLinks  bool                      // check for broken links in LinkAnnotations/URIDicts.
	Valid          bool                      // true means successful validated against ISO 32000.
	URIs           map[int]map[string]string // URIs for link checking

	Optimized   bool
	Watermarked bool
}

XRefTable represents a PDF cross reference table plus stats for a PDF file.

func CreateAcroFormDemoXRef 

func CreateAcroFormDemoXRef() (*XRefTable, error)

CreateAcroFormDemoXRef creates an xRefTable with an AcroForm example.

func CreateAnnotationDemoXRef 

func CreateAnnotationDemoXRef() (*XRefTable, error)

CreateAnnotationDemoXRef creates a PDF file with examples of annotations and actions.

func CreateDemoXRef added in v0.1.16 

func CreateDemoXRef(p Page) (*XRefTable, error)

CreateDemoXRef creates a minimal single page PDF file for demo purposes.

func CreateResourceDictInheritanceDemoXRef added in v0.3.4 

func CreateResourceDictInheritanceDemoXRef() (*XRefTable, error)

CreateResourceDictInheritanceDemoXRef creates a page tree for testing resource dict inheritance.

func (*XRefTable) BindNameTrees 

func (xRefTable *XRefTable) BindNameTrees() error

BindNameTrees syncs up the internal name tree cache with the xreftable.

func (*XRefTable) Catalog 

func (xRefTable *XRefTable) Catalog() (Dict, error)

Catalog returns a pointer to the root object / catalog.

func (*XRefTable) CatalogHasPieceInfo 

func (xRefTable *XRefTable) CatalogHasPieceInfo() (bool, error)

CatalogHasPieceInfo returns true if the root has an entry for \"PieceInfo\".

func (*XRefTable) DeleteObject 

func (xRefTable *XRefTable) DeleteObject(objNr int) error

DeleteObject marks an object as free and inserts it into the free list right after the head.

func (*XRefTable) DeleteObjectGraph 

func (xRefTable *XRefTable) DeleteObjectGraph(o Object) error

DeleteObjectGraph deletes all objects reachable by indRef.

func (*XRefTable) Dereference 

func (xRefTable *XRefTable) Dereference(o Object) (Object, error)

Dereference resolves an indirect object and returns the resulting PDF object.

func (*XRefTable) DereferenceArray 

func (xRefTable *XRefTable) DereferenceArray(o Object) (Array, error)

DereferenceArray resolves and validates an array object, which may be an indirect reference.

func (*XRefTable) DereferenceBoolean added in v0.2.3 

func (xRefTable *XRefTable) DereferenceBoolean(o Object, sinceVersion Version) (*Boolean, error)

DereferenceBoolean resolves and validates a boolean object, which may be an indirect reference.

func (*XRefTable) DereferenceCSVSafeText added in v0.2.3 

func (xRefTable *XRefTable) DereferenceCSVSafeText(o Object) (string, error)

DereferenceCSVSafeText resolves and validates a string or hex literal object to a string.

func (*XRefTable) DereferenceDict 

func (xRefTable *XRefTable) DereferenceDict(o Object) (Dict, error)

DereferenceDict resolves and validates a dictionary object, which may be an indirect reference.

func (*XRefTable) DereferenceDictEntry added in v0.1.16 

func (xRefTable *XRefTable) DereferenceDictEntry(d Dict, entryName string) (Object, error)

DereferenceDictEntry returns a dereferenced dict entry.

func (*XRefTable) DereferenceInteger 

func (xRefTable *XRefTable) DereferenceInteger(o Object) (*Integer, error)

DereferenceInteger resolves and validates an integer object, which may be an indirect reference.

func (*XRefTable) DereferenceName 

func (xRefTable *XRefTable) DereferenceName(o Object, sinceVersion Version, validate func(string) bool) (n Name, err error)

DereferenceName resolves and validates a name object, which may be an indirect reference.

func (*XRefTable) DereferenceNumber added in v0.1.16 

func (xRefTable *XRefTable) DereferenceNumber(o Object) (float64, error)

DereferenceNumber resolves a number object, which may be an indirect reference and returns a float64.

func (*XRefTable) DereferenceStreamDict 

func (xRefTable *XRefTable) DereferenceStreamDict(o Object) (*StreamDict, bool, error)

DereferenceStreamDict resolves stream dictionary objects.

func (*XRefTable) DereferenceStringLiteral 

func (xRefTable *XRefTable) DereferenceStringLiteral(o Object, sinceVersion Version, validate func(string) bool) (s StringLiteral, err error)

DereferenceStringLiteral resolves and validates a string literal object, which may be an indirect reference.

func (*XRefTable) DereferenceStringOrHexLiteral 

func (xRefTable *XRefTable) DereferenceStringOrHexLiteral(obj Object, sinceVersion Version, validate func(string) bool) (s string, err error)

DereferenceStringOrHexLiteral resolves and validates a string or hex literal object, which may be an indirect reference.

func (*XRefTable) DereferenceText added in v0.1.16 

func (xRefTable *XRefTable) DereferenceText(o Object) (string, error)

DereferenceText resolves and validates a string or hex literal object to a string.

func (*XRefTable) EncryptDict 

func (xRefTable *XRefTable) EncryptDict() (Dict, error)

EncryptDict returns a pointer to the root object / catalog.

func (*XRefTable) EnsureCollection 

func (xRefTable *XRefTable) EnsureCollection() error

EnsureCollection makes sure there is a Collection entry in the catalog. Needed for portfolio / portable collections eg. for file attachments.

func (*XRefTable) EnsurePageCount added in v0.2.4 

func (xRefTable *XRefTable) EnsurePageCount() error

EnsurePageCount evaluates the page count for xRefTable if necessary. Important when validation is turned off.

func (*XRefTable) EnsureValidFreeList 

func (xRefTable *XRefTable) EnsureValidFreeList() error

EnsureValidFreeList ensures the integrity of the free list associated with the recorded free objects. See 7.5.4 Cross-Reference Table

func (*XRefTable) EnsureVersionForWriting added in v0.2.5 

func (xRefTable *XRefTable) EnsureVersionForWriting()

EnsureVersionForWriting sets the version to the highest supported PDF Version 1.7. This is necessary to allow validation after adding features not supported by the original version of a document as during watermarking.

func (*XRefTable) Exists 

func (xRefTable *XRefTable) Exists(objNr int) bool

Exists returns true if xRefTable contains an entry for objNumber.

func (*XRefTable) Find 

func (xRefTable *XRefTable) Find(objNr int) (*XRefTableEntry, bool)

Find returns the XRefTable entry for given object number.

func (*XRefTable) FindObject 

func (xRefTable *XRefTable) FindObject(objNr int) (Object, error)

FindObject returns the object of the XRefTableEntry for a specific object number.

func (*XRefTable) FindTableEntry 

func (xRefTable *XRefTable) FindTableEntry(objNr int, genNr int) (*XRefTableEntry, bool)

FindTableEntry returns the XRefTable entry for given object and generation numbers.

func (*XRefTable) FindTableEntryForIndRef 

func (xRefTable *XRefTable) FindTableEntryForIndRef(ir *IndirectRef) (*XRefTableEntry, bool)

FindTableEntryForIndRef returns the XRefTable entry for given indirect reference.

func (*XRefTable) FindTableEntryLight 

func (xRefTable *XRefTable) FindTableEntryLight(objNr int) (*XRefTableEntry, bool)

FindTableEntryLight returns the XRefTable entry for given object number.

func (*XRefTable) Free 

func (xRefTable *XRefTable) Free(objNr int) (*XRefTableEntry, error)

Free returns the cross ref table entry for given number of a free object.

func (*XRefTable) IDFirstElement 

func (xRefTable *XRefTable) IDFirstElement() (id []byte, err error)

IDFirstElement returns the first element of ID.

func (*XRefTable) IndRefForNewObject 

func (xRefTable *XRefTable) IndRefForNewObject(obj Object) (*IndirectRef, error)

IndRefForNewObject inserts an object into the xRefTable and returns an indirect reference to it.

func (*XRefTable) InsertAndUseRecycled 

func (xRefTable *XRefTable) InsertAndUseRecycled(xRefTableEntry XRefTableEntry) (objNr int, err error)

InsertAndUseRecycled adds given xRefTableEntry into the cross reference table utilizing the freelist.

func (*XRefTable) InsertBlankPages added in v0.3.4 

func (xRefTable *XRefTable) InsertBlankPages(pages IntSet, before bool) error

InsertBlankPages inserts a blank page before or after each selected page.

func (*XRefTable) InsertNew 

func (xRefTable *XRefTable) InsertNew(xRefTableEntry XRefTableEntry) (objNr int)

InsertNew adds given xRefTableEntry at next new objNumber into the cross reference table. Only to be called once an xRefTable has been generated completely and all trailer dicts have been processed. xRefTable.Size is the size entry of the first trailer dict processed. Called on creation of new object streams. Called by InsertAndUseRecycled.

func (*XRefTable) InsertObject 

func (xRefTable *XRefTable) InsertObject(obj Object) (objNr int, err error)

InsertObject inserts an object into the xRefTable.

func (*XRefTable) IsLinearizationObject 

func (xRefTable *XRefTable) IsLinearizationObject(i int) bool

IsLinearizationObject returns true if object #i is a a linearization object.

func (*XRefTable) IsValid added in v0.3.8 

func (xRefTable *XRefTable) IsValid(ir IndirectRef) (bool, error)

IsValid returns true if the object referenced by ir has already been validated.

func (*XRefTable) LinearizationObjsString 

func (xRefTable *XRefTable) LinearizationObjsString() (int, string)

LinearizationObjsString returns a formatted string and the number of objs.

func (*XRefTable) LocateNameTree 

func (xRefTable *XRefTable) LocateNameTree(nameTreeName string, ensure bool) error

LocateNameTree locates/ensures a specific name tree.

func (*XRefTable) MissingObjects 

func (xRefTable *XRefTable) MissingObjects() (int, *string)

MissingObjects returns the number of objects that were not written plus the corresponding comma separated string representation.

func (*XRefTable) NamesDict 

func (xRefTable *XRefTable) NamesDict() (Dict, error)

NamesDict returns the dict that contains all name trees.

func (*XRefTable) NewEmbeddedFileStreamDict 

func (xRefTable *XRefTable) NewEmbeddedFileStreamDict(filename string) (*IndirectRef, error)

NewEmbeddedFileStreamDict returns an embeddedFileStreamDict containing the file "filename".

func (*XRefTable) NewEmbeddedStreamDict added in v0.3.5 

func (xRefTable *XRefTable) NewEmbeddedStreamDict(r io.Reader, modDate time.Time) (*IndirectRef, error)

NewEmbeddedStreamDict creates and returns an embeddedStreamDict containing the bytes represented by r.

func (*XRefTable) NewFileSpecDict 

func (xRefTable *XRefTable) NewFileSpecDict(f, uf, desc string, indRefStreamDict IndirectRef) (Dict, error)

NewFileSpecDict creates and returns a new fileSpec dictionary.

func (*XRefTable) NewFileSpectDictForAttachment added in v0.3.5 

func (xRefTable *XRefTable) NewFileSpectDictForAttachment(a Attachment) (*IndirectRef, error)

NewFileSpectDictForAttachment returns a fileSpecDict for a.

func (*XRefTable) NewSoundStreamDict 

func (xRefTable *XRefTable) NewSoundStreamDict(filename string, samplingRate int, fileSpecDict Dict) (*IndirectRef, error)

NewSoundStreamDict returns a new sound stream dict.

func (*XRefTable) NewStreamDictForBuf added in v0.3.3 

func (xRefTable *XRefTable) NewStreamDictForBuf(buf []byte) (*StreamDict, error)

NewStreamDictForBuf creates a streamDict for buf.

func (*XRefTable) NewStreamDictForFile added in v0.3.3 

func (xRefTable *XRefTable) NewStreamDictForFile(filename string) (*StreamDict, error)

NewStreamDictForFile creates a streamDict for filename.

func (*XRefTable) NextForFree 

func (xRefTable *XRefTable) NextForFree(objNr int) (int, error)

NextForFree returns the number of the object the free object with objNumber links to. This is the successor of this free object in the free list.

func (*XRefTable) Outlines added in v0.3.3 

func (xRefTable *XRefTable) Outlines() (*IndirectRef, error)

Outlines returns the Outlines reference contained in the catalog.

func (*XRefTable) PageBoundaries added in v0.3.8 

func (xRefTable *XRefTable) PageBoundaries() ([]PageBoundaries, error)

PageBoundaries returns a sorted slice with page boundaries for all pages sorted ascending by page number.

func (*XRefTable) PageContent added in v0.3.4 

func (xRefTable *XRefTable) PageContent(d Dict) ([]byte, error)

PageContent returns the content in PDF syntax for page dict d.

func (*XRefTable) PageDict 

func (xRefTable *XRefTable) PageDict(page int, consolidateRes bool) (Dict, *InheritedPageAttrs, error)

PageDict returns a specific page dict along with the resources, mediaBox and CropBox in effect.

func (*XRefTable) PageDims added in v0.2.4 

func (xRefTable *XRefTable) PageDims() ([]Dim, error)

PageDims returns a sorted slice with media box dimensions for all pages sorted ascending by page number.

func (*XRefTable) PageNumber added in v0.3.3 

func (xRefTable *XRefTable) PageNumber(pageObjNr int) (int, error)

PageNumber returns the logical page number for a page dict object number.

func (*XRefTable) Pages 

func (xRefTable *XRefTable) Pages() (*IndirectRef, error)

Pages returns the Pages reference contained in the catalog.

func (*XRefTable) ParseRootVersion 

func (xRefTable *XRefTable) ParseRootVersion() (v *string, err error)

ParseRootVersion returns a string representation for an optional Version entry in the root object.

func (*XRefTable) RemoveCollection 

func (xRefTable *XRefTable) RemoveCollection() error

RemoveCollection removes an existing Collection entry from the catalog.

func (*XRefTable) RemoveEmbeddedFilesNameTree 

func (xRefTable *XRefTable) RemoveEmbeddedFilesNameTree() error

RemoveEmbeddedFilesNameTree removes both the embedded files name tree and the Collection dict.

func (*XRefTable) RemoveNameTree 

func (xRefTable *XRefTable) RemoveNameTree(nameTreeName string) error

RemoveNameTree removes a specific name tree. Also removes a resulting empty names dict.

func (*XRefTable) SetValid added in v0.3.8 

func (xRefTable *XRefTable) SetValid(ir IndirectRef) error

SetValid marks the xreftable entry of the object referenced by ir as valid.

func (*XRefTable) UndeleteObject 

func (xRefTable *XRefTable) UndeleteObject(objectNumber int) error

UndeleteObject ensures an object is not recorded in the free list. e.g. sometimes caused by indirect references to free objects in the original PDF file.

func (*XRefTable) ValidateVersion 

func (xRefTable *XRefTable) ValidateVersion(element string, sinceVersion Version) error

ValidateVersion validates against the xRefTable's version.

func (*XRefTable) Version 

func (xRefTable *XRefTable) Version() Version

Version returns the PDF version of the PDF writer that created this file. Before V1.4 this is the header version. Since V1.4 the catalog may contain a Version entry which takes precedence over the header version.

func (*XRefTable) VersionString 

func (xRefTable *XRefTable) VersionString() string

VersionString return a string representation for this PDF files PDF version.

type XRefTableEntry 

type XRefTableEntry struct {
	Free            bool
	Offset          *int64
	Generation      *int
	RefCount        int
	Object          Object
	Compressed      bool
	ObjectStream    *int
	ObjectStreamInd *int
	Valid           bool
}

XRefTableEntry represents an entry in the PDF cross reference table.

This may wrap a free object, a compressed object or any in use PDF object:

Dict, StreamDict, ObjectStreamDict, PDFXRefStreamDict, Array, Integer, Float, Name, StringLiteral, HexLiteral, Boolean

func NewFreeHeadXRefTableEntry 

func NewFreeHeadXRefTableEntry() *XRefTableEntry

NewFreeHeadXRefTableEntry returns the xref table entry for object 0 which is per definition the head of the free list (list of free objects).

func NewXRefTableEntryGen0 

func NewXRefTableEntryGen0(obj Object) *XRefTableEntry

NewXRefTableEntryGen0 returns a cross reference table entry for an object with generation 0.

Source Files

View all Source files

Directories

Path Synopsis
Package validate implements validation against PDF 32000-1:2008.
 Package validate implements validation against PDF 32000-1:2008.

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