unipdf/model/optimize/optimize.go

//
// Copyright 2020 FoxyUtils ehf. All rights reserved.
//
// This is a commercial product and requires a license to operate.
// A trial license can be obtained at https://unidoc.io
//
// DO NOT EDIT: generated by unitwist Go source code obfuscator.
//
// Use of this source code is governed by the UniDoc End User License Agreement
// terms that can be accessed at https://unidoc.io/eula/

package optimize ;import (_c "bytes";_ga "crypto/md5";_gd "errors";_gc "github.com/unidoc/unipdf/v3/common";_cd "github.com/unidoc/unipdf/v3/contentstream";_g "github.com/unidoc/unipdf/v3/core";_bd "github.com/unidoc/unipdf/v3/extractor";_d "github.com/unidoc/unipdf/v3/internal/imageutil";
_fb "github.com/unidoc/unipdf/v3/internal/textencoding";_fd "github.com/unidoc/unipdf/v3/model";_ac "github.com/unidoc/unitype";_a "golang.org/x/image/draw";_f "math";);

// ObjectStreams groups PDF objects to object streams.
// It implements interface model.Optimizer.
type ObjectStreams struct{};

// CleanFonts cleans up embedded fonts, reducing font sizes.
type CleanFonts struct{

// Subset embedded fonts if encountered (if true).
// Otherwise attempts to reduce the font program.
Subset bool ;};

// CombineDuplicateDirectObjects combines duplicated direct objects by its data hash.
// It implements interface model.Optimizer.
type CombineDuplicateDirectObjects struct{};type imageInfo struct{ColorSpace _g .PdfObjectName ;BitsPerComponent int ;ColorComponents int ;Width int ;Height int ;Stream *_g .PdfObjectStream ;PPI float64 ;};

// CombineIdenticalIndirectObjects combines identical indirect objects.
// It implements interface model.Optimizer.
type CombineIdenticalIndirectObjects struct{};type content struct{_eeg string ;_aeb *_fd .PdfPageResources ;};func _bca (_bdc _g .PdfObject )[]content {if _bdc ==nil {return nil ;};_gbcb ,_fbef :=_g .GetArray (_bdc );if !_fbef {_gc .Log .Debug ("\u0041\u006e\u006e\u006fts\u0020\u006e\u006f\u0074\u0020\u0061\u006e\u0020\u0061\u0072\u0072\u0061\u0079");
return nil ;};var _abfa []content ;for _ ,_gfd :=range _gbcb .Elements (){_cbd ,_aea :=_g .GetDict (_gfd );if !_aea {_gc .Log .Debug ("I\u0067\u006e\u006f\u0072\u0069\u006eg\u0020\u006e\u006f\u006e\u002d\u0064i\u0063\u0074\u0020\u0065\u006c\u0065\u006de\u006e\u0074\u0020\u0069\u006e\u0020\u0041\u006e\u006e\u006ft\u0073");
continue ;};_bdb ,_aea :=_g .GetDict (_cbd .Get ("\u0041\u0050"));if !_aea {_gc .Log .Debug ("\u004e\u006f\u0020\u0041P \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_dce :=_g .TraceToDirectObject (_bdb .Get ("\u004e"));
if _dce ==nil {_gc .Log .Debug ("N\u006f\u0020\u004e\u0020en\u0074r\u0079\u0020\u002d\u0020\u0073k\u0069\u0070\u0070\u0069\u006e\u0067");continue ;};var _ddd *_g .PdfObjectStream ;switch _cga :=_dce .(type ){case *_g .PdfObjectDictionary :_dff ,_fag :=_g .GetName (_cbd .Get ("\u0041\u0053"));
if !_fag {_gc .Log .Debug ("\u004e\u006f\u0020\u0041S \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_ddd ,_fag =_g .GetStream (_cga .Get (*_dff ));if !_fag {_gc .Log .Debug ("\u0046o\u0072\u006d\u0020\u006eo\u0074\u0020\u0066\u006f\u0075n\u0064 \u002d \u0073\u006b\u0069\u0070\u0070\u0069\u006eg");
continue ;};case *_g .PdfObjectStream :_ddd =_cga ;};if _ddd ==nil {_gc .Log .Debug ("\u0046\u006f\u0072m\u0020\u006e\u006f\u0074 \u0066\u006f\u0075\u006e\u0064\u0020\u0028n\u0069\u006c\u0029\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069\u006e\u0067");
continue ;};_edf ,_abd :=_fd .NewXObjectFormFromStream (_ddd );if _abd !=nil {_gc .Log .Debug ("\u0045\u0072\u0072\u006f\u0072\u0020l\u006f\u0061\u0064\u0069\u006e\u0067\u0020\u0066\u006f\u0072\u006d\u003a\u0020%\u0076\u0020\u002d\u0020\u0069\u0067\u006eo\u0072\u0069\u006e\u0067",_abd );
continue ;};_faf ,_abd :=_edf .GetContentStream ();if _abd !=nil {_gc .Log .Debug ("E\u0072\u0072\u006f\u0072\u0020\u0064e\u0063\u006f\u0064\u0069\u006e\u0067\u0020\u0063\u006fn\u0074\u0065\u006et\u0073:\u0020\u0025\u0076",_abd );continue ;};_abfa =append (_abfa ,content {_eeg :string (_faf ),_aeb :_edf .Resources });
};return _abfa ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_ba *CleanContentstream )Optimize (objects []_g .PdfObject )(_dee []_g .PdfObject ,_dc error ){_gag :=map[*_g .PdfObjectStream ]struct{}{};var _fbc []*_g .PdfObjectStream ;_eb :=func (_cg *_g .PdfObjectStream ){if _ ,_ge :=_gag [_cg ];!_ge {_gag [_cg ]=struct{}{};
_fbc =append (_fbc ,_cg );};};for _ ,_eg :=range objects {switch _ec :=_eg .(type ){case *_g .PdfIndirectObject :switch _gb :=_ec .PdfObject .(type ){case *_g .PdfObjectDictionary :if _gac ,_cgc :=_g .GetName (_gb .Get ("\u0054\u0079\u0070\u0065"));!_cgc ||_gac .String ()!="\u0050\u0061\u0067\u0065"{continue ;
};if _cbc ,_bb :=_g .GetStream (_gb .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_bb {_eb (_cbc );}else if _fge ,_fgg :=_g .GetArray (_gb .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_fgg {for _ ,_df :=range _fge .Elements (){if _gbc ,_dcf :=_g .GetStream (_df );
_dcf {_eb (_gbc );};};};};case *_g .PdfObjectStream :if _bf ,_aad :=_g .GetName (_ec .Get ("\u0054\u0079\u0070\u0065"));!_aad ||_bf .String ()!="\u0058O\u0062\u006a\u0065\u0063\u0074"{continue ;};if _fbe ,_bbb :=_g .GetName (_ec .Get ("\u0053u\u0062\u0074\u0079\u0070\u0065"));
!_bbb ||_fbe .String ()!="\u0046\u006f\u0072\u006d"{continue ;};_eb (_ec );};};for _ ,_bge :=range _fbc {_dc =_eef (_bge );if _dc !=nil {return nil ,_dc ;};};return objects ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_geb *CombineDuplicateDirectObjects )Optimize (objects []_g .PdfObject )(_ddc []_g .PdfObject ,_fba error ){_beaa (objects );_ggd :=make (map[string ][]*_g .PdfObjectDictionary );var _gfc func (_gbg *_g .PdfObjectDictionary );_gfc =func (_faa *_g .PdfObjectDictionary ){for _ ,_fbd :=range _faa .Keys (){_cdc :=_faa .Get (_fbd );
if _ef ,_fdg :=_cdc .(*_g .PdfObjectDictionary );_fdg {_ddg :=_ga .New ();_ddg .Write ([]byte (_ef .WriteString ()));_ceg :=string (_ddg .Sum (nil ));_ggd [_ceg ]=append (_ggd [_ceg ],_ef );_gfc (_ef );};};};for _ ,_deag :=range objects {_cca ,_bba :=_deag .(*_g .PdfIndirectObject );
if !_bba {continue ;};if _bcc ,_fbaf :=_cca .PdfObject .(*_g .PdfObjectDictionary );_fbaf {_gfc (_bcc );};};_gbb :=make ([]_g .PdfObject ,0,len (_ggd ));_bcd :=make (map[_g .PdfObject ]_g .PdfObject );for _ ,_dgd :=range _ggd {if len (_dgd )< 2{continue ;
};_bga :=_g .MakeDict ();_bga .Merge (_dgd [0]);_fac :=_g .MakeIndirectObject (_bga );_gbb =append (_gbb ,_fac );for _bfa :=0;_bfa < len (_dgd );_bfa ++{_aef :=_dgd [_bfa ];_bcd [_aef ]=_fac ;};};_ddc =make ([]_g .PdfObject ,len (objects ));copy (_ddc ,objects );
_ddc =append (_gbb ,_ddc ...);_cdge (_ddc ,_bcd );return _ddc ,nil ;};

// CompressStreams compresses uncompressed streams.
// It implements interface model.Optimizer.
type CompressStreams struct{};func _feg (_bfd []_g .PdfObject )objectStructure {_faff :=objectStructure {};_ddeec :=false ;for _ ,_dabb :=range _bfd {switch _egfag :=_dabb .(type ){case *_g .PdfIndirectObject :_cfge ,_ccb :=_g .GetDict (_egfag );if !_ccb {continue ;
};_ffb ,_ccb :=_g .GetName (_cfge .Get ("\u0054\u0079\u0070\u0065"));if !_ccb {continue ;};switch _ffb .String (){case "\u0043a\u0074\u0061\u006c\u006f\u0067":_faff ._aaa =_cfge ;_ddeec =true ;};};if _ddeec {break ;};};if !_ddeec {return _faff ;};_cac ,_dfad :=_g .GetDict (_faff ._aaa .Get ("\u0050\u0061\u0067e\u0073"));
if !_dfad {return _faff ;};_faff ._egfa =_cac ;_deeg ,_dfad :=_g .GetArray (_cac .Get ("\u004b\u0069\u0064\u0073"));if !_dfad {return _faff ;};for _ ,_gba :=range _deeg .Elements (){_cda ,_babe :=_g .GetIndirect (_gba );if !_babe {break ;};_faff ._egfe =append (_faff ._egfe ,_cda );
};return _faff ;};type imageModifications struct{Scale float64 ;Encoding _g .StreamEncoder ;};func _cdge (_cgef []_g .PdfObject ,_eee map[_g .PdfObject ]_g .PdfObject ){if len (_eee )==0{return ;};for _adg ,_dabe :=range _cgef {if _ddcg ,_ebcf :=_eee [_dabe ];
_ebcf {_cgef [_adg ]=_ddcg ;continue ;};_eee [_dabe ]=_dabe ;switch _dca :=_dabe .(type ){case *_g .PdfObjectArray :_adce :=make ([]_g .PdfObject ,_dca .Len ());copy (_adce ,_dca .Elements ());_cdge (_adce ,_eee );for _gaba ,_eegg :=range _adce {_dca .Set (_gaba ,_eegg );
};case *_g .PdfObjectStreams :_cdge (_dca .Elements (),_eee );case *_g .PdfObjectStream :_bee :=[]_g .PdfObject {_dca .PdfObjectDictionary };_cdge (_bee ,_eee );_dca .PdfObjectDictionary =_bee [0].(*_g .PdfObjectDictionary );case *_g .PdfObjectDictionary :_gdbc :=_dca .Keys ();
_dga :=make ([]_g .PdfObject ,len (_gdbc ));for _dac ,_bfcf :=range _gdbc {_dga [_dac ]=_dca .Get (_bfcf );};_cdge (_dga ,_eee );for _aeec ,_acae :=range _gdbc {_dca .Set (_acae ,_dga [_aeec ]);};case *_g .PdfIndirectObject :_addg :=[]_g .PdfObject {_dca .PdfObject };
_cdge (_addg ,_eee );_dca .PdfObject =_addg [0];};};};func _dbg (_bbg []_g .PdfObject )(_age map[*_g .PdfObjectStream ]struct{},_ab error ){_age =map[*_g .PdfObjectStream ]struct{}{};_cdg :=map[*_fd .PdfFont ]struct{}{};_dde :=_feg (_bbg );for _ ,_bc :=range _dde ._egfe {_ecf ,_gdc :=_g .GetDict (_bc .PdfObject );
if !_gdc {continue ;};_aac ,_gdc :=_g .GetDict (_ecf .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));if !_gdc {continue ;};_ed ,_ :=_ebff (_ecf .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_gdb ,_cgd :=_fd .NewPdfPageResourcesFromDict (_aac );
if _cgd !=nil {return nil ,_cgd ;};_bbd :=[]content {{_eeg :_ed ,_aeb :_gdb }};_bgf :=_bca (_ecf .Get ("\u0041\u006e\u006e\u006f\u0074\u0073"));if _bgf !=nil {_bbd =append (_bbd ,_bgf ...);};for _ ,_acc :=range _bbd {_dbe ,_afa :=_bd .NewFromContents (_acc ._eeg ,_acc ._aeb );
if _afa !=nil {return nil ,_afa ;};_ffg ,_ ,_ ,_afa :=_dbe .ExtractPageText ();if _afa !=nil {return nil ,_afa ;};for _ ,_aaf :=range _ffg .Marks ().Elements (){if _aaf .Font ==nil {continue ;};if _ ,_ecg :=_cdg [_aaf .Font ];!_ecg {_cdg [_aaf .Font ]=struct{}{};
};};};};_gea :=map[*_g .PdfObjectStream ][]*_fd .PdfFont {};for _ca :=range _cdg {_aba :=_ca .FontDescriptor ();if _aba ==nil ||_aba .FontFile2 ==nil {continue ;};_dcb ,_bged :=_g .GetStream (_aba .FontFile2 );if !_bged {continue ;};_gea [_dcb ]=append (_gea [_dcb ],_ca );
};for _ccg :=range _gea {var _abf []rune ;var _aab []_ac .GlyphIndex ;for _ ,_bde :=range _gea [_ccg ]{switch _gee :=_bde .Encoder ().(type ){case *_fb .IdentityEncoder :_fa :=_gee .RegisteredRunes ();_egd :=make ([]_ac .GlyphIndex ,len (_fa ));for _da ,_eed :=range _fa {_egd [_da ]=_ac .GlyphIndex (_eed );
};_aab =append (_aab ,_egd ...);case *_fb .TrueTypeFontEncoder :_bdac :=_gee .RegisteredRunes ();_abf =append (_abf ,_bdac ...);case _fb .SimpleEncoder :_egb :=_gee .Charcodes ();for _ ,_eea :=range _egb {_ccd ,_def :=_gee .CharcodeToRune (_eea );if !_def {_gc .Log .Debug ("\u0043\u0068a\u0072\u0063\u006f\u0064\u0065\u003c\u002d\u003e\u0072\u0075\u006e\u0065\u0020\u006e\u006f\u0074\u0020\u0066\u006f\u0075\u006e\u0064: \u0025\u0064",_eea );
continue ;};_abf =append (_abf ,_ccd );};};};_ab =_dbd (_ccg ,_abf ,_aab );if _ab !=nil {_gc .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u0020\u0073\u0075\u0062\u0073\u0065\u0074\u0074\u0069\u006eg\u0020f\u006f\u006e\u0074\u0020\u0073\u0074\u0072\u0065\u0061\u006d\u003a\u0020\u0025\u0076",_ab );
return nil ,_ab ;};_age [_ccg ]=struct{}{};};return _age ,nil ;};

// New creates a optimizers chain from options.
func New (options Options )*Chain {_cgfd :=new (Chain );if options .CleanFonts ||options .SubsetFonts {_cgfd .Append (&CleanFonts {Subset :options .SubsetFonts });};if options .CleanContentstream {_cgfd .Append (new (CleanContentstream ));};if options .ImageUpperPPI > 0{_bgac :=new (ImagePPI );
_bgac .ImageUpperPPI =options .ImageUpperPPI ;_cgfd .Append (_bgac );};if options .ImageQuality > 0{_acfb :=new (Image );_acfb .ImageQuality =options .ImageQuality ;_cgfd .Append (_acfb );};if options .CombineDuplicateDirectObjects {_cgfd .Append (new (CombineDuplicateDirectObjects ));
};if options .CombineDuplicateStreams {_cgfd .Append (new (CombineDuplicateStreams ));};if options .CombineIdenticalIndirectObjects {_cgfd .Append (new (CombineIdenticalIndirectObjects ));};if options .UseObjectStreams {_cgfd .Append (new (ObjectStreams ));
};if options .CompressStreams {_cgfd .Append (new (CompressStreams ));};return _cgfd ;};

// Append appends optimizers to the chain.
func (_ee *Chain )Append (optimizers ..._fd .Optimizer ){_ee ._e =append (_ee ._e ,optimizers ...)};

// Options describes PDF optimization parameters.
type Options struct{CombineDuplicateStreams bool ;CombineDuplicateDirectObjects bool ;ImageUpperPPI float64 ;ImageQuality int ;UseObjectStreams bool ;CombineIdenticalIndirectObjects bool ;CompressStreams bool ;CleanFonts bool ;SubsetFonts bool ;CleanContentstream bool ;
};

// Optimize optimizes PDF objects to decrease PDF size.
func (_bea *CleanFonts )Optimize (objects []_g .PdfObject )(_dbef []_g .PdfObject ,_fbf error ){var _gab map[*_g .PdfObjectStream ]struct{};if _bea .Subset {var _bae error ;_gab ,_bae =_dbg (objects );if _bae !=nil {return nil ,_bae ;};};for _ ,_bdee :=range objects {_eaa ,_beb :=_g .GetStream (_bdee );
if !_beb {continue ;};if _ ,_caf :=_gab [_eaa ];_caf {continue ;};_ffga ,_ebe :=_g .NewEncoderFromStream (_eaa );if _ebe !=nil {_gc .Log .Debug ("\u0045\u0052RO\u0052\u0020\u0067e\u0074\u0074\u0069\u006eg e\u006eco\u0064\u0065\u0072\u003a\u0020\u0025\u0076 -\u0020\u0069\u0067\u006e\u006f\u0072\u0069n\u0067",_ebe );
continue ;};_cae ,_ebe :=_ffga .DecodeStream (_eaa );if _ebe !=nil {_gc .Log .Debug ("\u0044\u0065\u0063\u006f\u0064\u0069\u006e\u0067\u0020\u0065r\u0072\u006f\u0072\u0020\u003a\u0020\u0025v\u0020\u002d\u0020\u0069\u0067\u006e\u006f\u0072\u0069\u006e\u0067",_ebe );
continue ;};if len (_cae )< 4{continue ;};_bdeg :=string (_cae [:4]);if _bdeg =="\u004f\u0054\u0054\u004f"{continue ;};if _bdeg !="\u0000\u0001\u0000\u0000"&&_bdeg !="\u0074\u0072\u0075\u0065"{continue ;};_aec ,_ebe :=_ac .Parse (_c .NewReader (_cae ));
if _ebe !=nil {_gc .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u0020P\u0061\u0072\u0073\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076\u0020\u002d\u0020\u0069\u0067\u006eo\u0072\u0069\u006e\u0067",_ebe );continue ;};_ebe =_aec .Optimize ();
if _ebe !=nil {continue ;};var _gf _c .Buffer ;_ebe =_aec .Write (&_gf );if _ebe !=nil {_gc .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u0020W\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076\u0020\u002d\u0020\u0069\u0067\u006eo\u0072\u0069\u006e\u0067",_ebe );
continue ;};if _gf .Len ()> len (_cae ){_gc .Log .Debug ("\u0052\u0065-\u0077\u0072\u0069\u0074\u0074\u0065\u006e\u0020\u0066\u006f\u006e\u0074\u0020\u0069\u0073\u0020\u006c\u0061\u0072\u0067\u0065\u0072\u0020\u0074\u0068\u0061\u006e\u0020\u006f\u0072\u0069\u0067\u0069\u006e\u0061\u006c\u0020\u002d\u0020\u0073\u006b\u0069\u0070");
continue ;};_fec ,_ebe :=_g .MakeStream (_gf .Bytes (),_g .NewFlateEncoder ());if _ebe !=nil {continue ;};*_eaa =*_fec ;_eaa .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_g .MakeInteger (int64 (_gf .Len ())));};return objects ,nil ;};func _dbd (_aga *_g .PdfObjectStream ,_aff []rune ,_ccgc []_ac .GlyphIndex )error {_aga ,_dg :=_g .GetStream (_aga );
if !_dg {_gc .Log .Debug ("\u0045\u006d\u0062\u0065\u0064\u0064\u0065\u0064\u0020\u0066\u006f\u006e\u0074\u0020\u006f\u0062\u006a\u0065c\u0074\u0020\u006e\u006f\u0074\u0020\u0066o\u0075\u006e\u0064\u0020\u002d\u002d\u0020\u0041\u0042\u004f\u0052T\u0020\u0073\u0075\u0062\u0073\u0065\u0074\u0074\u0069\u006e\u0067");
return _gd .New ("\u0066\u006f\u006e\u0074fi\u006c\u0065\u0032\u0020\u006e\u006f\u0074\u0020\u0066\u006f\u0075\u006e\u0064");};_cec ,_dcff :=_g .DecodeStream (_aga );if _dcff !=nil {_gc .Log .Debug ("\u0044\u0065c\u006f\u0064\u0065 \u0065\u0072\u0072\u006f\u0072\u003a\u0020\u0025\u0076",_dcff );
return _dcff ;};_gdf ,_dcff :=_ac .Parse (_c .NewReader (_cec ));if _dcff !=nil {_gc .Log .Debug ("\u0045\u0072\u0072\u006f\u0072\u0020\u0070\u0061\u0072\u0073\u0069n\u0067\u0020\u0025\u0064\u0020\u0062\u0079\u0074\u0065\u0020f\u006f\u006e\u0074",len (_aga .Stream ));
return _dcff ;};_gace :=_ccgc ;if len (_aff )> 0{_ggc :=_gdf .LookupRunes (_aff );_gace =append (_gace ,_ggc ...);};_gdf ,_dcff =_gdf .SubsetKeepIndices (_gace );if _dcff !=nil {_gc .Log .Debug ("\u0045R\u0052\u004f\u0052\u0020s\u0075\u0062\u0073\u0065\u0074t\u0069n\u0067 \u0066\u006f\u006e\u0074\u003a\u0020\u0025v",_dcff );
return _dcff ;};var _fbed _c .Buffer ;_dcff =_gdf .Write (&_fbed );if _dcff !=nil {_gc .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_dcff );return _dcff ;};if _fbed .Len ()> len (_cec ){_gc .Log .Debug ("\u0052\u0065-\u0077\u0072\u0069\u0074\u0074\u0065\u006e\u0020\u0066\u006f\u006e\u0074\u0020\u0069\u0073\u0020\u006c\u0061\u0072\u0067\u0065\u0072\u0020\u0074\u0068\u0061\u006e\u0020\u006f\u0072\u0069\u0067\u0069\u006e\u0061\u006c\u0020\u002d\u0020\u0073\u006b\u0069\u0070");
return nil ;};_bag ,_dcff :=_g .MakeStream (_fbed .Bytes (),_g .NewFlateEncoder ());if _dcff !=nil {_gc .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_dcff );return _dcff ;
};*_aga =*_bag ;_aga .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_g .MakeInteger (int64 (_fbed .Len ())));return nil ;};

// ImagePPI optimizes images by scaling images such that the PPI (pixels per inch) is never higher than ImageUpperPPI.
// TODO(a5i): Add support for inline images.
// It implements interface model.Optimizer.
type ImagePPI struct{ImageUpperPPI float64 ;};func _badc (_bdd *_fd .Image ,_bdba float64 )(*_fd .Image ,error ){_eged ,_bec :=_bdd .ToGoImage ();if _bec !=nil {return nil ,_bec ;};var _dbec _d .Image ;_dab ,_bgebg :=_eged .(*_d .Monochrome );if _bgebg {if _bec =_dab .ResolveDecode ();
_bec !=nil {return nil ,_bec ;};_dbec ,_bec =_dab .Scale (_bdba );if _bec !=nil {return nil ,_bec ;};}else {_fcb :=int (_f .RoundToEven (float64 (_bdd .Width )*_bdba ));_affc :=int (_f .RoundToEven (float64 (_bdd .Height )*_bdba ));_dbec ,_bec =_d .NewImage (_fcb ,_affc ,int (_bdd .BitsPerComponent ),_bdd .ColorComponents ,nil ,nil ,nil );
if _bec !=nil {return nil ,_bec ;};_a .CatmullRom .Scale (_dbec ,_dbec .Bounds (),_eged ,_eged .Bounds (),_a .Over ,&_a .Options {});};_gegc :=_dbec .Base ();_abbe :=&_fd .Image {Width :int64 (_gegc .Width ),Height :int64 (_gegc .Height ),BitsPerComponent :int64 (_gegc .BitsPerComponent ),ColorComponents :_gegc .ColorComponents ,Data :_gegc .Data };
_abbe .SetDecode (_gegc .Decode );_abbe .SetAlpha (_gegc .Alpha );return _abbe ,nil ;};type objectStructure struct{_aaa *_g .PdfObjectDictionary ;_egfa *_g .PdfObjectDictionary ;_egfe []*_g .PdfIndirectObject ;};

// Image optimizes images by rewrite images into JPEG format with quality equals to ImageQuality.
// TODO(a5i): Add support for inline images.
// It implements interface model.Optimizer.
type Image struct{ImageQuality int ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_ffab *ObjectStreams )Optimize (objects []_g .PdfObject )(_dbfc []_g .PdfObject ,_cece error ){_ebf :=&_g .PdfObjectStreams {};_ccgce :=make ([]_g .PdfObject ,0,len (objects ));for _ ,_bbef :=range objects {if _dag ,_cebb :=_bbef .(*_g .PdfIndirectObject );
_cebb &&_dag .GenerationNumber ==0{_ebf .Append (_bbef );}else {_ccgce =append (_ccgce ,_bbef );};};if _ebf .Len ()==0{return _ccgce ,nil ;};_dbfc =make ([]_g .PdfObject ,0,len (_ccgce )+_ebf .Len ()+1);if _ebf .Len ()> 1{_dbfc =append (_dbfc ,_ebf );};
_dbfc =append (_dbfc ,_ebf .Elements ()...);_dbfc =append (_dbfc ,_ccgce ...);return _dbfc ,nil ;};func _af (_ea *_cd .ContentStreamOperations )*_cd .ContentStreamOperations {if _ea ==nil {return nil ;};_ff :=_cd .ContentStreamOperations {};for _ ,_fe :=range *_ea {switch _fe .Operand {case "\u0042\u0044\u0043","\u0042\u004d\u0043","\u0045\u004d\u0043":continue ;
case "\u0054\u006d":if len (_fe .Params )==6{if _gg ,_acf :=_g .GetNumbersAsFloat (_fe .Params );_acf ==nil {if _gg [0]==1&&_gg [1]==0&&_gg [2]==0&&_gg [3]==1{_fe =&_cd .ContentStreamOperation {Params :[]_g .PdfObject {_fe .Params [4],_fe .Params [5]},Operand :"\u0054\u0064"};
};};};};_ff =append (_ff ,_fe );};return &_ff ;};

// CleanContentstream cleans up redundant operands in content streams, including Page and XObject Form
// contents. This process includes:
// 1. Marked content operators are removed.
// 2. Some operands are simplified (shorter form).
// TODO: Add more reduction methods and improving the methods for identifying unnecessary operands.
type CleanContentstream struct{};

// Chain allows to use sequence of optimizers.
// It implements interface model.Optimizer.
type Chain struct{_e []_fd .Optimizer };

// Optimize optimizes PDF objects to decrease PDF size.
func (_be *Chain )Optimize (objects []_g .PdfObject )(_db []_g .PdfObject ,_ce error ){_db =objects ;for _ ,_fc :=range _be ._e {_db ,_ce =_fc .Optimize (_db );if _ce !=nil {return _db ,_ce ;};};return _db ,nil ;};func _ebff (_gabab _g .PdfObject )(_dbb string ,_accg []_g .PdfObject ){var _ggag _c .Buffer ;
switch _fda :=_gabab .(type ){case *_g .PdfIndirectObject :_accg =append (_accg ,_fda );_gabab =_fda .PdfObject ;};switch _dfaf :=_gabab .(type ){case *_g .PdfObjectStream :if _fbdc ,_gadc :=_g .DecodeStream (_dfaf );_gadc ==nil {_ggag .Write (_fbdc );
_accg =append (_accg ,_dfaf );};case *_g .PdfObjectArray :for _ ,_bcb :=range _dfaf .Elements (){switch _ccfc :=_bcb .(type ){case *_g .PdfObjectStream :if _gdd ,_fabf :=_g .DecodeStream (_ccfc );_fabf ==nil {_ggag .Write (_gdd );_accg =append (_accg ,_ccfc );
};};};};return _ggag .String (),_accg ;};func _eef (_de *_g .PdfObjectStream )error {_ag ,_gce :=_g .DecodeStream (_de );if _gce !=nil {return _gce ;};_cdf :=_cd .NewContentStreamParser (string (_ag ));_cf ,_gce :=_cdf .Parse ();if _gce !=nil {return _gce ;
};_cf =_af (_cf );_cb :=_cf .Bytes ();if len (_cb )>=len (_ag ){return nil ;};_bda ,_gce :=_g .MakeStream (_cf .Bytes (),_g .NewFlateEncoder ());if _gce !=nil {return _gce ;};_de .Stream =_bda .Stream ;_de .Merge (_bda .PdfObjectDictionary );return nil ;
};

// Optimize optimizes PDF objects to decrease PDF size.
func (_gad *Image )Optimize (objects []_g .PdfObject )(_efb []_g .PdfObject ,_gbbg error ){if _gad .ImageQuality <=0{return objects ,nil ;};_dcd :=_ffaf (objects );if len (_dcd )==0{return objects ,nil ;};_dfd :=make (map[_g .PdfObject ]_g .PdfObject );
_dffa :=make (map[_g .PdfObject ]struct{});for _ ,_eefb :=range _dcd {_ege :=_eefb .Stream .PdfObjectDictionary .Get (_g .PdfObjectName ("\u0053\u004d\u0061s\u006b"));_dffa [_ege ]=struct{}{};};for _bbbd ,_baba :=range _dcd {_daf :=_baba .Stream ;if _ ,_dcda :=_dffa [_daf ];
_dcda {continue ;};_befe ,_fcgc :=_g .NewEncoderFromStream (_daf );if _fcgc !=nil {_gc .Log .Warning ("\u0045\u0072\u0072\u006f\u0072 \u0067\u0065\u0074\u0020\u0065\u006e\u0063\u006f\u0064\u0065\u0072\u0020\u0066o\u0072\u0020\u0074\u0068\u0065\u0020\u0069\u006d\u0061\u0067\u0065\u0020\u0073\u0074\u0072\u0065\u0061\u006d\u0020\u0025\u0073");
continue ;};_gda ,_fcgc :=_befe .DecodeStream (_daf );if _fcgc !=nil {_gc .Log .Warning ("\u0045\u0072\u0072\u006f\u0072\u0020\u0064\u0065\u0063\u006f\u0064\u0065\u0020\u0074\u0068e\u0020i\u006d\u0061\u0067\u0065\u0020\u0073\u0074\u0072\u0065\u0061\u006d\u0020\u0025\u0073");
continue ;};_bfc :=_g .NewDCTEncoder ();_bfc .ColorComponents =_baba .ColorComponents ;_bfc .Quality =_gad .ImageQuality ;_bfc .BitsPerComponent =_baba .BitsPerComponent ;_bfc .Width =_baba .Width ;_bfc .Height =_baba .Height ;_eec ,_fcgc :=_bfc .EncodeBytes (_gda );
if _fcgc !=nil {_gc .Log .Debug ("\u0045R\u0052\u004f\u0052\u003a\u0020\u0025v",_fcgc );return nil ,_fcgc ;};var _aaff _g .StreamEncoder ;_aaff =_bfc ;{_fcgb :=_g .NewFlateEncoder ();_agd :=_g .NewMultiEncoder ();_agd .AddEncoder (_fcgb );_agd .AddEncoder (_bfc );
_cffg ,_fff :=_agd .EncodeBytes (_gda );if _fff !=nil {return nil ,_fff ;};if len (_cffg )< len (_eec ){_gc .Log .Debug ("\u004d\u0075\u006c\u0074\u0069\u0020\u0065\u006e\u0063\u0020\u0069\u006d\u0070\u0072\u006f\u0076\u0065\u0073\u003a\u0020\u0025\u0064\u0020\u0074o\u0020\u0025\u0064\u0020\u0028o\u0072\u0069g\u0020\u0025\u0064\u0029",len (_eec ),len (_cffg ),len (_daf .Stream ));
_eec =_cffg ;_aaff =_agd ;};};_ead :=len (_daf .Stream );if _ead < len (_eec ){continue ;};_bfg :=&_g .PdfObjectStream {Stream :_eec };_bfg .PdfObjectReference =_daf .PdfObjectReference ;_bfg .PdfObjectDictionary =_g .MakeDict ();_bfg .Merge (_daf .PdfObjectDictionary );
_bfg .Merge (_aaff .MakeStreamDict ());_bfg .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_g .MakeInteger (int64 (len (_eec ))));_dfd [_daf ]=_bfg ;_dcd [_bbbd ].Stream =_bfg ;};_efb =make ([]_g .PdfObject ,len (objects ));copy (_efb ,objects );_cdge (_efb ,_dfd );
return _efb ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_egdg *ImagePPI )Optimize (objects []_g .PdfObject )(_agec []_g .PdfObject ,_cgg error ){if _egdg .ImageUpperPPI <=0{return objects ,nil ;};_afe :=_ffaf (objects );if len (_afe )==0{return objects ,nil ;};_bbed :=make (map[_g .PdfObject ]struct{});
for _ ,_ebcb :=range _afe {_ffdg :=_ebcb .Stream .PdfObjectDictionary .Get (_g .PdfObjectName ("\u0053\u004d\u0061s\u006b"));_bbed [_ffdg ]=struct{}{};};_cbba :=make (map[*_g .PdfObjectStream ]*imageInfo );for _ ,_aee :=range _afe {_cbba [_aee .Stream ]=_aee ;
};var _dafb *_g .PdfObjectDictionary ;for _ ,_acd :=range objects {if _gcd ,_gcea :=_g .GetDict (_acd );_dafb ==nil &&_gcea {if _fea ,_ddee :=_g .GetName (_gcd .Get (_g .PdfObjectName ("\u0054\u0079\u0070\u0065")));_ddee &&*_fea =="\u0043a\u0074\u0061\u006c\u006f\u0067"{_dafb =_gcd ;
};};};if _dafb ==nil {return objects ,nil ;};_gde ,_dge :=_g .GetDict (_dafb .Get (_g .PdfObjectName ("\u0050\u0061\u0067e\u0073")));if !_dge {return objects ,nil ;};_cgge ,_ccf :=_g .GetArray (_gde .Get (_g .PdfObjectName ("\u004b\u0069\u0064\u0073")));
if !_ccf {return objects ,nil ;};_fcf :=make (map[string ]*imageInfo );for _ ,_egce :=range _cgge .Elements (){_bccb ,_cfg :=_g .GetDict (_egce );if !_cfg {continue ;};_cbgf ,_egde :=_g .GetArray (_bccb .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));
if !_egde {continue ;};_fed ,_cbgg :=_g .GetDict (_bccb .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));if !_cbgg {continue ;};_cba ,_befc :=_g .GetDict (_fed .Get ("\u0058O\u0062\u006a\u0065\u0063\u0074"));if !_befc {continue ;};_cea :=_cba .Keys ();
for _ ,_addd :=range _cea {if _afb ,_eggd :=_g .GetStream (_cba .Get (_addd ));_eggd {if _ccgb ,_gfdf :=_cbba [_afb ];_gfdf {_fcf [string (_addd )]=_ccgb ;};};};for _ ,_ffgab :=range _cbgf .Elements (){if _dddc ,_fcfc :=_g .GetStream (_ffgab );_fcfc {_bcg ,_cag :=_g .NewEncoderFromStream (_dddc );
if _cag !=nil {return nil ,_cag ;};_befcd ,_cag :=_bcg .DecodeStream (_dddc );if _cag !=nil {return nil ,_cag ;};_fgee :=_cd .NewContentStreamParser (string (_befcd ));_dgc ,_cag :=_fgee .Parse ();if _cag !=nil {return nil ,_cag ;};_egbf ,_cge :=1.0,1.0;
for _ ,_dad :=range *_dgc {if _dad .Operand =="\u0051"{_egbf ,_cge =1.0,1.0;};if _dad .Operand =="\u0063\u006d"&&len (_dad .Params )==6{if _cfa ,_bbbf :=_g .GetFloatVal (_dad .Params [0]);_bbbf {_egbf =_egbf *_cfa ;};if _aeaa ,_ccfa :=_g .GetFloatVal (_dad .Params [3]);
_ccfa {_cge =_cge *_aeaa ;};if _dbc ,_gabb :=_g .GetIntVal (_dad .Params [0]);_gabb {_egbf =_egbf *float64 (_dbc );};if _ega ,_bgff :=_g .GetIntVal (_dad .Params [3]);_bgff {_cge =_cge *float64 (_ega );};};if _dad .Operand =="\u0044\u006f"&&len (_dad .Params )==1{_gfdfa ,_eeb :=_g .GetName (_dad .Params [0]);
if !_eeb {continue ;};if _dbcd ,_cafg :=_fcf [string (*_gfdfa )];_cafg {_edac ,_ffc :=_egbf /72.0,_cge /72.0;_bdbac ,_fafb :=float64 (_dbcd .Width )/_edac ,float64 (_dbcd .Height )/_ffc ;if _edac ==0||_ffc ==0{_bdbac =72.0;_fafb =72.0;};_dbcd .PPI =_f .Max (_dbcd .PPI ,_bdbac );
_dbcd .PPI =_f .Max (_dbcd .PPI ,_fafb );};};};};};};for _ ,_eedb :=range _afe {if _ ,_eag :=_bbed [_eedb .Stream ];_eag {continue ;};if _eedb .PPI <=_egdg .ImageUpperPPI {continue ;};_gga ,_dba :=_fd .NewXObjectImageFromStream (_eedb .Stream );if _dba !=nil {return nil ,_dba ;
};var _dec imageModifications ;_dec .Scale =_egdg .ImageUpperPPI /_eedb .PPI ;if _eedb .BitsPerComponent ==1&&_eedb .ColorComponents ==1{_cfad :=_f .Round (_eedb .PPI /_egdg .ImageUpperPPI );_ddb :=_d .NextPowerOf2 (uint (_cfad ));if _d .InDelta (float64 (_ddb ),1/_dec .Scale ,0.3){_dec .Scale =float64 (1)/float64 (_ddb );
};if _ ,_ffca :=_gga .Filter .(*_g .JBIG2Encoder );!_ffca {_dec .Encoding =_g .NewJBIG2Encoder ();};};if _dba =_ecfc (_gga ,_dec );_dba !=nil {_gc .Log .Debug ("\u0045\u0072\u0072\u006f\u0072 \u0073\u0063\u0061\u006c\u0065\u0020\u0069\u006d\u0061\u0067\u0065\u0020\u006be\u0065\u0070\u0020\u006f\u0072\u0069\u0067\u0069\u006e\u0061\u006c\u0020\u0069\u006d\u0061\u0067\u0065\u003a\u0020\u0025\u0073",_dba );
continue ;};_dec .Encoding =nil ;if _ddbe ,_aeae :=_g .GetStream (_eedb .Stream .PdfObjectDictionary .Get (_g .PdfObjectName ("\u0053\u004d\u0061s\u006b")));_aeae {_dfdd ,_gfcg :=_fd .NewXObjectImageFromStream (_ddbe );if _gfcg !=nil {return nil ,_gfcg ;
};if _gfcg =_ecfc (_dfdd ,_dec );_gfcg !=nil {return nil ,_gfcg ;};};};return objects ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_bead *CompressStreams )Optimize (objects []_g .PdfObject )(_bfae []_g .PdfObject ,_gcfa error ){_bfae =make ([]_g .PdfObject ,len (objects ));copy (_bfae ,objects );for _ ,_afd :=range objects {_fcg ,_degb :=_g .GetStream (_afd );if !_degb {continue ;
};if _eead :=_fcg .Get ("\u0046\u0069\u006c\u0074\u0065\u0072");_eead !=nil {if _ ,_ddda :=_g .GetName (_eead );_ddda {continue ;};if _fab ,_ceb :=_g .GetArray (_eead );_ceb &&_fab .Len ()> 0{continue ;};};_bef :=_g .NewFlateEncoder ();var _cgad []byte ;
_cgad ,_gcfa =_bef .EncodeBytes (_fcg .Stream );if _gcfa !=nil {return _bfae ,_gcfa ;};_gcff :=_bef .MakeStreamDict ();if len (_cgad )+len (_gcff .WriteString ())< len (_fcg .Stream ){_fcg .Stream =_cgad ;_fcg .PdfObjectDictionary .Merge (_gcff );_fcg .PdfObjectDictionary .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_g .MakeInteger (int64 (len (_fcg .Stream ))));
};};return _bfae ,nil ;};func _ffaf (_cgf []_g .PdfObject )[]*imageInfo {_gfe :=_g .PdfObjectName ("\u0053u\u0062\u0074\u0079\u0070\u0065");_ffd :=make (map[*_g .PdfObjectStream ]struct{});var _aeaf error ;var _gdba []*imageInfo ;for _ ,_dfe :=range _cgf {_edd ,_gef :=_g .GetStream (_dfe );
if !_gef {continue ;};if _ ,_fgb :=_ffd [_edd ];_fgb {continue ;};_ffd [_edd ]=struct{}{};_fgf :=_edd .PdfObjectDictionary .Get (_gfe );_eda ,_gef :=_g .GetName (_fgf );if !_gef ||string (*_eda )!="\u0049\u006d\u0061g\u0065"{continue ;};_ece :=&imageInfo {BitsPerComponent :8,Stream :_edd };
if _ece .ColorSpace ,_aeaf =_fd .DetermineColorspaceNameFromPdfObject (_edd .PdfObjectDictionary .Get ("\u0043\u006f\u006c\u006f\u0072\u0053\u0070\u0061\u0063\u0065"));_aeaf !=nil {_gc .Log .Error ("\u0045\u0072\u0072\u006f\u0072\u0020\u0064\u0065\u0074\u0065r\u006d\u0069\u006e\u0065\u0020\u0063\u006fl\u006f\u0072\u0020\u0073\u0070\u0061\u0063\u0065\u0020\u0025\u0073",_aeaf );
continue ;};if _fgd ,_gfg :=_g .GetIntVal (_edd .PdfObjectDictionary .Get ("\u0042\u0069t\u0073\u0050\u0065r\u0043\u006f\u006d\u0070\u006f\u006e\u0065\u006e\u0074"));_gfg {_ece .BitsPerComponent =_fgd ;};if _afc ,_fbb :=_g .GetIntVal (_edd .PdfObjectDictionary .Get ("\u0057\u0069\u0064t\u0068"));
_fbb {_ece .Width =_afc ;};if _geg ,_ebcc :=_g .GetIntVal (_edd .PdfObjectDictionary .Get ("\u0048\u0065\u0069\u0067\u0068\u0074"));_ebcc {_ece .Height =_geg ;};switch _ece .ColorSpace {case "\u0044e\u0076\u0069\u0063\u0065\u0052\u0047B":_ece .ColorComponents =3;
case "\u0044\u0065\u0076\u0069\u0063\u0065\u0047\u0072\u0061\u0079":_ece .ColorComponents =1;default:_gc .Log .Warning ("\u004f\u0070\u0074\u0069\u006d\u0069\u007a\u0061t\u0069\u006f\u006e i\u0073\u0020\u006e\u006f\u0074\u0020s\u0075\u0070\u0070\u006f\u0072\u0074\u0065\u0064\u0020\u0066\u006f\u0072\u0020\u0063\u006fl\u006f\u0072\u0020\u0073\u0070\u0061\u0063\u0065 \u0025\u0073",_ece .ColorSpace );
continue ;};_gdba =append (_gdba ,_ece );};return _gdba ;};func _ecfc (_abff *_fd .XObjectImage ,_bfb imageModifications )error {_agc ,_addc :=_abff .ToImage ();if _addc !=nil {return _addc ;};if _bfb .Scale !=0{_agc ,_addc =_badc (_agc ,_bfb .Scale );
if _addc !=nil {return _addc ;};};if _bfb .Encoding !=nil {_abff .Filter =_bfb .Encoding ;};_cee :=_g .MakeDict ();_cee .Set ("\u0051u\u0061\u006c\u0069\u0074\u0079",_g .MakeInteger (100));_cee .Set ("\u0050r\u0065\u0064\u0069\u0063\u0074\u006fr",_g .MakeInteger (1));
_abff .Decode =nil ;if _addc =_abff .SetImage (_agc ,nil );_addc !=nil {return _addc ;};_abff .ToPdfObject ();return nil ;};

// CombineDuplicateStreams combines duplicated streams by its data hash.
// It implements interface model.Optimizer.
type CombineDuplicateStreams struct{};func _beaa (_cbag []_g .PdfObject ){for _gfa ,_facc :=range _cbag {switch _gegg :=_facc .(type ){case *_g .PdfIndirectObject :_gegg .ObjectNumber =int64 (_gfa +1);_gegg .GenerationNumber =0;case *_g .PdfObjectStream :_gegg .ObjectNumber =int64 (_gfa +1);
_gegg .GenerationNumber =0;case *_g .PdfObjectStreams :_gegg .ObjectNumber =int64 (_gfa +1);_gegg .GenerationNumber =0;};};};

// Optimize optimizes PDF objects to decrease PDF size.
func (_ad *CombineIdenticalIndirectObjects )Optimize (objects []_g .PdfObject )(_eff []_g .PdfObject ,_ecfa error ){_beaa (objects );_gcf :=make (map[_g .PdfObject ]_g .PdfObject );_abb :=make (map[_g .PdfObject ]struct{});_edg :=make (map[string ][]*_g .PdfIndirectObject );
for _ ,_fbedf :=range objects {_ccda ,_fbdf :=_fbedf .(*_g .PdfIndirectObject );if !_fbdf {continue ;};if _egf ,_agag :=_ccda .PdfObject .(*_g .PdfObjectDictionary );_agag {if _adc ,_bbe :=_egf .Get ("\u0054\u0079\u0070\u0065").(*_g .PdfObjectName );_bbe &&*_adc =="\u0050\u0061\u0067\u0065"{continue ;
};_ddgg :=_ga .New ();_ddgg .Write ([]byte (_egf .WriteString ()));_bbgc :=string (_ddgg .Sum (nil ));_edg [_bbgc ]=append (_edg [_bbgc ],_ccda );};};for _ ,_bcdg :=range _edg {if len (_bcdg )< 2{continue ;};_fde :=_bcdg [0];for _cab :=1;_cab < len (_bcdg );
_cab ++{_eba :=_bcdg [_cab ];_gcf [_eba ]=_fde ;_abb [_eba ]=struct{}{};};};_eff =make ([]_g .PdfObject ,0,len (objects )-len (_abb ));for _ ,_eege :=range objects {if _ ,_accb :=_abb [_eege ];_accb {continue ;};_eff =append (_eff ,_eege );};_cdge (_eff ,_gcf );
return _eff ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_egc *CombineDuplicateStreams )Optimize (objects []_g .PdfObject )(_deb []_g .PdfObject ,_aca error ){_dfa :=make (map[_g .PdfObject ]_g .PdfObject );_daa :=make (map[_g .PdfObject ]struct{});_edc :=make (map[string ][]*_g .PdfObjectStream );for _ ,_gdgc :=range objects {if _bce ,_gdca :=_gdgc .(*_g .PdfObjectStream );
_gdca {_ede :=_ga .New ();_ede .Write (_bce .Stream );_eefa :=string (_ede .Sum (nil ));_edc [_eefa ]=append (_edc [_eefa ],_bce );};};for _ ,_cbg :=range _edc {if len (_cbg )< 2{continue ;};_gacf :=_cbg [0];for _cgdc :=1;_cgdc < len (_cbg );_cgdc ++{_ggg :=_cbg [_cgdc ];
_dfa [_ggg ]=_gacf ;_daa [_ggg ]=struct{}{};};};_deb =make ([]_g .PdfObject ,0,len (objects )-len (_daa ));for _ ,_bbdc :=range objects {if _ ,_dbf :=_daa [_bbdc ];_dbf {continue ;};_deb =append (_deb ,_bbdc );};_cdge (_deb ,_dfa );return _deb ,nil ;};