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";_bd "crypto/md5";_dc "errors";_ac "github.com/unidoc/unipdf/v3/common";_bb "github.com/unidoc/unipdf/v3/contentstream";_b "github.com/unidoc/unipdf/v3/core";_g "github.com/unidoc/unipdf/v3/extractor";_ab "github.com/unidoc/unipdf/v3/internal/imageutil";
_bf "github.com/unidoc/unipdf/v3/internal/textencoding";_fd "github.com/unidoc/unipdf/v3/model";_d "github.com/unidoc/unitype";_e "golang.org/x/image/draw";_f "math";);

// Optimize optimizes PDF objects to decrease PDF size.
func (_fdd *Image )Optimize (objects []_b .PdfObject )(_acgf []_b .PdfObject ,_bead error ){if _fdd .ImageQuality <=0{return objects ,nil ;};_cgb :=_eda (objects );if len (_cgb )==0{return objects ,nil ;};_ecbc :=make (map[_b .PdfObject ]_b .PdfObject );
_dgca :=make (map[_b .PdfObject ]struct{});for _ ,_afa :=range _cgb {_fddf :=_afa .Stream .PdfObjectDictionary .Get (_b .PdfObjectName ("\u0053\u004d\u0061s\u006b"));_dgca [_fddf ]=struct{}{};};for _bdag ,_ecde :=range _cgb {_aee :=_ecde .Stream ;if _ ,_aeb :=_dgca [_aee ];
_aeb {continue ;};_fddb ,_fag :=_b .NewEncoderFromStream (_aee );if _fag !=nil {_ac .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 ;};_gef ,_fag :=_fddb .DecodeStream (_aee );if _fag !=nil {_ac .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 ;};_cea :=_b .NewDCTEncoder ();_cea .ColorComponents =_ecde .ColorComponents ;_cea .Quality =_fdd .ImageQuality ;_cea .BitsPerComponent =_ecde .BitsPerComponent ;_cea .Width =_ecde .Width ;_cea .Height =_ecde .Height ;_bbe ,_fag :=_cea .EncodeBytes (_gef );
if _fag !=nil {_ac .Log .Debug ("\u0045R\u0052\u004f\u0052\u003a\u0020\u0025v",_fag );return nil ,_fag ;};var _gba _b .StreamEncoder ;_gba =_cea ;{_cec :=_b .NewFlateEncoder ();_eac :=_b .NewMultiEncoder ();_eac .AddEncoder (_cec );_eac .AddEncoder (_cea );
_gfg ,_gce :=_eac .EncodeBytes (_gef );if _gce !=nil {return nil ,_gce ;};if len (_gfg )< len (_bbe ){_ac .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 (_bbe ),len (_gfg ),len (_aee .Stream ));
_bbe =_gfg ;_gba =_eac ;};};_ced :=len (_aee .Stream );if _ced < len (_bbe ){continue ;};_ebfa :=&_b .PdfObjectStream {Stream :_bbe };_ebfa .PdfObjectReference =_aee .PdfObjectReference ;_ebfa .PdfObjectDictionary =_b .MakeDict ();_ebfa .Merge (_aee .PdfObjectDictionary );
_ebfa .Merge (_gba .MakeStreamDict ());_ebfa .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_b .MakeInteger (int64 (len (_bbe ))));_ecbc [_aee ]=_ebfa ;_cgb [_bdag ].Stream =_ebfa ;};_acgf =make ([]_b .PdfObject ,len (objects ));copy (_acgf ,objects );_adg (_acgf ,_ecbc );
return _acgf ,nil ;};

// 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 ;};func _cd (_da *_bb .ContentStreamOperations )*_bb .ContentStreamOperations {if _da ==nil {return nil ;};_ca :=_bb .ContentStreamOperations {};for _ ,_gf :=range *_da {switch _gf .Operand {case "\u0042\u0044\u0043","\u0042\u004d\u0043","\u0045\u004d\u0043":continue ;
case "\u0054\u006d":if len (_gf .Params )==6{if _bbb ,_ag :=_b .GetNumbersAsFloat (_gf .Params );_ag ==nil {if _bbb [0]==1&&_bbb [1]==0&&_bbb [2]==0&&_bbb [3]==1{_gf =&_bb .ContentStreamOperation {Params :[]_b .PdfObject {_gf .Params [4],_gf .Params [5]},Operand :"\u0054\u0064"};
};};};};_ca =append (_ca ,_gf );};return &_ca ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_affc *CombineIdenticalIndirectObjects )Optimize (objects []_b .PdfObject )(_dee []_b .PdfObject ,_gaee error ){_eaf (objects );_cbe :=make (map[_b .PdfObject ]_b .PdfObject );_abbad :=make (map[_b .PdfObject ]struct{});_ffd :=make (map[string ][]*_b .PdfIndirectObject );
for _ ,_cdd :=range objects {_gdf ,_cbd :=_cdd .(*_b .PdfIndirectObject );if !_cbd {continue ;};if _dbc ,_befc :=_gdf .PdfObject .(*_b .PdfObjectDictionary );_befc {if _cda ,_fae :=_dbc .Get ("\u0054\u0079\u0070\u0065").(*_b .PdfObjectName );_fae &&*_cda =="\u0050\u0061\u0067\u0065"{continue ;
};_ddgg :=_bd .New ();_ddgg .Write ([]byte (_dbc .WriteString ()));_afbg :=string (_ddgg .Sum (nil ));_ffd [_afbg ]=append (_ffd [_afbg ],_gdf );};};for _ ,_fad :=range _ffd {if len (_fad )< 2{continue ;};_efe :=_fad [0];for _caec :=1;_caec < len (_fad );
_caec ++{_ddb :=_fad [_caec ];_cbe [_ddb ]=_efe ;_abbad [_ddb ]=struct{}{};};};_dee =make ([]_b .PdfObject ,0,len (objects )-len (_abbad ));for _ ,_gcd :=range objects {if _ ,_bcb :=_abbad [_gcd ];_bcb {continue ;};_dee =append (_dee ,_gcd );};_adg (_dee ,_cbe );
return _dee ,nil ;};

// New creates a optimizers chain from options.
func New (options Options )*Chain {_ffb :=new (Chain );if options .CleanFonts ||options .SubsetFonts {_ffb .Append (&CleanFonts {Subset :options .SubsetFonts });};if options .CleanContentstream {_ffb .Append (new (CleanContentstream ));};if options .ImageUpperPPI > 0{_dfce :=new (ImagePPI );
_dfce .ImageUpperPPI =options .ImageUpperPPI ;_ffb .Append (_dfce );};if options .ImageQuality > 0{_gceg :=new (Image );_gceg .ImageQuality =options .ImageQuality ;_ffb .Append (_gceg );};if options .CombineDuplicateDirectObjects {_ffb .Append (new (CombineDuplicateDirectObjects ));
};if options .CombineDuplicateStreams {_ffb .Append (new (CombineDuplicateStreams ));};if options .CombineIdenticalIndirectObjects {_ffb .Append (new (CombineIdenticalIndirectObjects ));};if options .UseObjectStreams {_ffb .Append (new (ObjectStreams ));
};if options .CompressStreams {_ffb .Append (new (CompressStreams ));};return _ffb ;};type imageModifications struct{Scale float64 ;Encoding _b .StreamEncoder ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_fcec *CleanFonts )Optimize (objects []_b .PdfObject )(_bfe []_b .PdfObject ,_eec error ){var _fbb map[*_b .PdfObjectStream ]struct{};if _fcec .Subset {var _cgc error ;_fbb ,_cgc =_dfe (objects );if _cgc !=nil {return nil ,_cgc ;};};for _ ,_cff :=range objects {_egb ,_fbc :=_b .GetStream (_cff );
if !_fbc {continue ;};if _ ,_fdcf :=_fbb [_egb ];_fdcf {continue ;};_ef ,_gbc :=_b .NewEncoderFromStream (_egb );if _gbc !=nil {_ac .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",_gbc );
continue ;};_adfb ,_gbc :=_ef .DecodeStream (_egb );if _gbc !=nil {_ac .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",_gbc );
continue ;};if len (_adfb )< 4{continue ;};_ccfg :=string (_adfb [:4]);if _ccfg =="\u004f\u0054\u0054\u004f"{continue ;};if _ccfg !="\u0000\u0001\u0000\u0000"&&_ccfg !="\u0074\u0072\u0075\u0065"{continue ;};_beg ,_gbc :=_d .Parse (_c .NewReader (_adfb ));
if _gbc !=nil {_ac .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",_gbc );continue ;};_gbc =_beg .Optimize ();
if _gbc !=nil {continue ;};var _ace _c .Buffer ;_gbc =_beg .Write (&_ace );if _gbc !=nil {_ac .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",_gbc );
continue ;};if _ace .Len ()> len (_adfb ){_ac .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 ;};_agd ,_gbc :=_b .MakeStream (_ace .Bytes (),_b .NewFlateEncoder ());if _gbc !=nil {continue ;};*_egb =*_agd ;_egb .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_b .MakeInteger (int64 (_ace .Len ())));};return objects ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_bfff *CombineDuplicateDirectObjects )Optimize (objects []_b .PdfObject )(_fa []_b .PdfObject ,_bdf error ){_eaf (objects );_edg :=make (map[string ][]*_b .PdfObjectDictionary );var _egaa func (_bde *_b .PdfObjectDictionary );_egaa =func (_cbce *_b .PdfObjectDictionary ){for _ ,_daa :=range _cbce .Keys (){_acfb :=_cbce .Get (_daa );
if _aae ,_bee :=_acfb .(*_b .PdfObjectDictionary );_bee {_gbd :=_bd .New ();_gbd .Write ([]byte (_aae .WriteString ()));_afc :=string (_gbd .Sum (nil ));_edg [_afc ]=append (_edg [_afc ],_aae );_egaa (_aae );};};};for _ ,_affd :=range objects {_dea ,_ebb :=_affd .(*_b .PdfIndirectObject );
if !_ebb {continue ;};if _gcg ,_age :=_dea .PdfObject .(*_b .PdfObjectDictionary );_age {_egaa (_gcg );};};_fbd :=make ([]_b .PdfObject ,0,len (_edg ));_dbeb :=make (map[_b .PdfObject ]_b .PdfObject );for _ ,_cdcg :=range _edg {if len (_cdcg )< 2{continue ;
};_acdae :=_b .MakeDict ();_acdae .Merge (_cdcg [0]);_cca :=_b .MakeIndirectObject (_acdae );_fbd =append (_fbd ,_cca );for _faa :=0;_faa < len (_cdcg );_faa ++{_cge :=_cdcg [_faa ];_dbeb [_cge ]=_cca ;};};_fa =make ([]_b .PdfObject ,len (objects ));copy (_fa ,objects );
_fa =append (_fbd ,_fa ...);_adg (_fa ,_dbeb );return _fa ,nil ;};func _eda (_bdfe []_b .PdfObject )[]*imageInfo {_gdd :=_b .PdfObjectName ("\u0053u\u0062\u0074\u0079\u0070\u0065");_fdfd :=make (map[*_b .PdfObjectStream ]struct{});var _fcg error ;var _acg []*imageInfo ;
for _ ,_fga :=range _bdfe {_cfa ,_bec :=_b .GetStream (_fga );if !_bec {continue ;};if _ ,_dab :=_fdfd [_cfa ];_dab {continue ;};_fdfd [_cfa ]=struct{}{};_afd :=_cfa .PdfObjectDictionary .Get (_gdd );_cbac ,_bec :=_b .GetName (_afd );if !_bec ||string (*_cbac )!="\u0049\u006d\u0061g\u0065"{continue ;
};_ecce :=&imageInfo {BitsPerComponent :8,Stream :_cfa };if _ecce .ColorSpace ,_fcg =_fd .DetermineColorspaceNameFromPdfObject (_cfa .PdfObjectDictionary .Get ("\u0043\u006f\u006c\u006f\u0072\u0053\u0070\u0061\u0063\u0065"));_fcg !=nil {_ac .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",_fcg );
continue ;};if _gaaf ,_gfba :=_b .GetIntVal (_cfa .PdfObjectDictionary .Get ("\u0042\u0069t\u0073\u0050\u0065r\u0043\u006f\u006d\u0070\u006f\u006e\u0065\u006e\u0074"));_gfba {_ecce .BitsPerComponent =_gaaf ;};if _gcdg ,_cac :=_b .GetIntVal (_cfa .PdfObjectDictionary .Get ("\u0057\u0069\u0064t\u0068"));
_cac {_ecce .Width =_gcdg ;};if _efaa ,_dabb :=_b .GetIntVal (_cfa .PdfObjectDictionary .Get ("\u0048\u0065\u0069\u0067\u0068\u0074"));_dabb {_ecce .Height =_efaa ;};switch _ecce .ColorSpace {case "\u0044e\u0076\u0069\u0063\u0065\u0052\u0047B":_ecce .ColorComponents =3;
case "\u0044\u0065\u0076\u0069\u0063\u0065\u0047\u0072\u0061\u0079":_ecce .ColorComponents =1;default:_ac .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",_ecce .ColorSpace );
continue ;};_acg =append (_acg ,_ecce );};return _acg ;};func _aa (_cdea _b .PdfObject )[]content {if _cdea ==nil {return nil ;};_gfa ,_fca :=_b .GetArray (_cdea );if !_fca {_ac .Log .Debug ("\u0041\u006e\u006e\u006fts\u0020\u006e\u006f\u0074\u0020\u0061\u006e\u0020\u0061\u0072\u0072\u0061\u0079");
return nil ;};var _cfb []content ;for _ ,_cae :=range _gfa .Elements (){_acd ,_acda :=_b .GetDict (_cae );if !_acda {_ac .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 ;};_egbf ,_acda :=_b .GetDict (_acd .Get ("\u0041\u0050"));if !_acda {_ac .Log .Debug ("\u004e\u006f\u0020\u0041P \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_ddgd :=_b .TraceToDirectObject (_egbf .Get ("\u004e"));
if _ddgd ==nil {_ac .Log .Debug ("N\u006f\u0020\u004e\u0020en\u0074r\u0079\u0020\u002d\u0020\u0073k\u0069\u0070\u0070\u0069\u006e\u0067");continue ;};var _agda *_b .PdfObjectStream ;switch _fg :=_ddgd .(type ){case *_b .PdfObjectDictionary :_ggdd ,_ffa :=_b .GetName (_acd .Get ("\u0041\u0053"));
if !_ffa {_ac .Log .Debug ("\u004e\u006f\u0020\u0041S \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_agda ,_ffa =_b .GetStream (_fg .Get (*_ggdd ));if !_ffa {_ac .Log .Debug ("\u0046o\u0072\u006d\u0020\u006eo\u0074\u0020\u0066\u006f\u0075n\u0064 \u002d \u0073\u006b\u0069\u0070\u0070\u0069\u006eg");
continue ;};case *_b .PdfObjectStream :_agda =_fg ;};if _agda ==nil {_ac .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 ;};_daf ,_ecc :=_fd .NewXObjectFormFromStream (_agda );if _ecc !=nil {_ac .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",_ecc );
continue ;};_egf ,_ecc :=_daf .GetContentStream ();if _ecc !=nil {_ac .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",_ecc );continue ;};_cfb =append (_cfb ,content {_gabe :string (_egf ),_bcc :_daf .Resources });
};return _cfb ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_fc *CleanContentstream )Optimize (objects []_b .PdfObject )(_ge []_b .PdfObject ,_afg error ){_fce :=map[*_b .PdfObjectStream ]struct{}{};var _cag []*_b .PdfObjectStream ;_ggf :=func (_dg *_b .PdfObjectStream ){if _ ,_dgf :=_fce [_dg ];!_dgf {_fce [_dg ]=struct{}{};
_cag =append (_cag ,_dg );};};for _ ,_dae :=range objects {switch _gd :=_dae .(type ){case *_b .PdfIndirectObject :switch _ee :=_gd .PdfObject .(type ){case *_b .PdfObjectDictionary :if _ccb ,_gea :=_b .GetName (_ee .Get ("\u0054\u0079\u0070\u0065"));!_gea ||_ccb .String ()!="\u0050\u0061\u0067\u0065"{continue ;
};if _gab ,_cdb :=_b .GetStream (_ee .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_cdb {_ggf (_gab );}else if _ad ,_be :=_b .GetArray (_ee .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_be {for _ ,_cba :=range _ad .Elements (){if _abb ,_ggd :=_b .GetStream (_cba );
_ggd {_ggf (_abb );};};};};case *_b .PdfObjectStream :if _acf ,_ccbg :=_b .GetName (_gd .Get ("\u0054\u0079\u0070\u0065"));!_ccbg ||_acf .String ()!="\u0058O\u0062\u006a\u0065\u0063\u0074"{continue ;};if _bef ,_dbe :=_b .GetName (_gd .Get ("\u0053u\u0062\u0074\u0079\u0070\u0065"));
!_dbe ||_bef .String ()!="\u0046\u006f\u0072\u006d"{continue ;};_ggf (_gd );};};for _ ,_ba :=range _cag {_afg =_cc (_ba );if _afg !=nil {return nil ,_afg ;};};return objects ,nil ;};

// 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 ;
};func _bada (_geaa *_b .PdfObjectStream ,_ccbf []rune ,_egc []_d .GlyphIndex )error {_geaa ,_afb :=_b .GetStream (_geaa );if !_afb {_ac .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 _dc .New ("\u0066\u006f\u006e\u0074fi\u006c\u0065\u0032\u0020\u006e\u006f\u0074\u0020\u0066\u006f\u0075\u006e\u0064");};_ccf ,_cab :=_b .DecodeStream (_geaa );if _cab !=nil {_ac .Log .Debug ("\u0044\u0065c\u006f\u0064\u0065 \u0065\u0072\u0072\u006f\u0072\u003a\u0020\u0025\u0076",_cab );
return _cab ;};_fb ,_cab :=_d .Parse (_c .NewReader (_ccf ));if _cab !=nil {_ac .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 (_geaa .Stream ));
return _cab ;};_gcc :=_egc ;if len (_ccbf )> 0{_adf :=_fb .LookupRunes (_ccbf );_gcc =append (_gcc ,_adf ...);};_fb ,_cab =_fb .SubsetKeepIndices (_gcc );if _cab !=nil {_ac .Log .Debug ("\u0045R\u0052\u004f\u0052\u0020s\u0075\u0062\u0073\u0065\u0074t\u0069n\u0067 \u0066\u006f\u006e\u0074\u003a\u0020\u0025v",_cab );
return _cab ;};var _bgf _c .Buffer ;_cab =_fb .Write (&_bgf );if _cab !=nil {_ac .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_cab );return _cab ;};if _bgf .Len ()> len (_ccf ){_ac .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 ;};_cbc ,_cab :=_b .MakeStream (_bgf .Bytes (),_b .NewFlateEncoder ());if _cab !=nil {_ac .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_cab );return _cab ;
};*_geaa =*_cbc ;_geaa .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_b .MakeInteger (int64 (_bgf .Len ())));return nil ;};func _beed (_dde []_b .PdfObject )objectStructure {_dfcb :=objectStructure {};_gbfb :=false ;for _ ,_ageb :=range _dde {switch _cffa :=_ageb .(type ){case *_b .PdfIndirectObject :_gfd ,_bbdfe :=_b .GetDict (_cffa );
if !_bbdfe {continue ;};_bbfc ,_bbdfe :=_b .GetName (_gfd .Get ("\u0054\u0079\u0070\u0065"));if !_bbdfe {continue ;};switch _bbfc .String (){case "\u0043a\u0074\u0061\u006c\u006f\u0067":_dfcb ._fdfda =_gfd ;_gbfb =true ;};};if _gbfb {break ;};};if !_gbfb {return _dfcb ;
};_gege ,_ccbd :=_b .GetDict (_dfcb ._fdfda .Get ("\u0050\u0061\u0067e\u0073"));if !_ccbd {return _dfcb ;};_dfcb ._gdc =_gege ;_dcce ,_ccbd :=_b .GetArray (_gege .Get ("\u004b\u0069\u0064\u0073"));if !_ccbd {return _dfcb ;};for _ ,_bab :=range _dcce .Elements (){_egg ,_begf :=_b .GetIndirect (_bab );
if !_begf {break ;};_dfcb ._bcbf =append (_dfcb ._bcbf ,_egg );};return _dfcb ;};func _ffag (_cgcc *_fd .Image ,_ebc float64 )(*_fd .Image ,error ){_ece ,_fbdb :=_cgcc .ToGoImage ();if _fbdb !=nil {return nil ,_fbdb ;};var _abad _ab .Image ;_bgg ,_gfc :=_ece .(*_ab .Monochrome );
if _gfc {if _fbdb =_bgg .ResolveDecode ();_fbdb !=nil {return nil ,_fbdb ;};_abad ,_fbdb =_bgg .Scale (_ebc );if _fbdb !=nil {return nil ,_fbdb ;};}else {_dbfd :=int (_f .RoundToEven (float64 (_cgcc .Width )*_ebc ));_gbe :=int (_f .RoundToEven (float64 (_cgcc .Height )*_ebc ));
_abad ,_fbdb =_ab .NewImage (_dbfd ,_gbe ,int (_cgcc .BitsPerComponent ),_cgcc .ColorComponents ,nil ,nil ,nil );if _fbdb !=nil {return nil ,_fbdb ;};_e .CatmullRom .Scale (_abad ,_abad .Bounds (),_ece ,_ece .Bounds (),_e .Over ,&_e .Options {});};_gcgg :=_abad .Base ();
_efd :=&_fd .Image {Width :int64 (_gcgg .Width ),Height :int64 (_gcgg .Height ),BitsPerComponent :int64 (_gcgg .BitsPerComponent ),ColorComponents :_gcgg .ColorComponents ,Data :_gcgg .Data };_efd .SetDecode (_gcgg .Decode );_efd .SetAlpha (_gcgg .Alpha );
return _efd ,nil ;};

// 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{};

// ObjectStreams groups PDF objects to object streams.
// It implements interface model.Optimizer.
type ObjectStreams struct{};func _adg (_faae []_b .PdfObject ,_gaac map[_b .PdfObject ]_b .PdfObject ){if len (_gaac )==0{return ;};for _caa ,_ged :=range _faae {if _fada ,_aadc :=_gaac [_ged ];_aadc {_faae [_caa ]=_fada ;continue ;};_gaac [_ged ]=_ged ;
switch _cagc :=_ged .(type ){case *_b .PdfObjectArray :_ffgb :=make ([]_b .PdfObject ,_cagc .Len ());copy (_ffgb ,_cagc .Elements ());_adg (_ffgb ,_gaac );for _ffad ,_gac :=range _ffgb {_cagc .Set (_ffad ,_gac );};case *_b .PdfObjectStreams :_adg (_cagc .Elements (),_gaac );
case *_b .PdfObjectStream :_aage :=[]_b .PdfObject {_cagc .PdfObjectDictionary };_adg (_aage ,_gaac );_cagc .PdfObjectDictionary =_aage [0].(*_b .PdfObjectDictionary );case *_b .PdfObjectDictionary :_dbcd :=_cagc .Keys ();_bggd :=make ([]_b .PdfObject ,len (_dbcd ));
for _daef ,_cddc :=range _dbcd {_bggd [_daef ]=_cagc .Get (_cddc );};_adg (_bggd ,_gaac );for _bgbe ,_dggg :=range _dbcd {_cagc .Set (_dggg ,_bggd [_bgbe ]);};case *_b .PdfIndirectObject :_ffdf :=[]_b .PdfObject {_cagc .PdfObject };_adg (_ffdf ,_gaac );
_cagc .PdfObject =_ffdf [0];};};};

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

// Optimize optimizes PDF objects to decrease PDF size.
func (_cabb *CompressStreams )Optimize (objects []_b .PdfObject )(_egfa []_b .PdfObject ,_bbdf error ){_egfa =make ([]_b .PdfObject ,len (objects ));copy (_egfa ,objects );for _ ,_adc :=range objects {_ecd ,_bgfe :=_b .GetStream (_adc );if !_bgfe {continue ;
};if _ebba :=_ecd .Get ("\u0046\u0069\u006c\u0074\u0065\u0072");_ebba !=nil {if _ ,_egbb :=_b .GetName (_ebba );_egbb {continue ;};if _dbd ,_dfa :=_b .GetArray (_ebba );_dfa &&_dbd .Len ()> 0{continue ;};};_gge :=_b .NewFlateEncoder ();var _bgb []byte ;
_bgb ,_bbdf =_gge .EncodeBytes (_ecd .Stream );if _bbdf !=nil {return _egfa ,_bbdf ;};_eaef :=_gge .MakeStreamDict ();if len (_bgb )+len (_eaef .WriteString ())< len (_ecd .Stream ){_ecd .Stream =_bgb ;_ecd .PdfObjectDictionary .Merge (_eaef );_ecd .PdfObjectDictionary .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_b .MakeInteger (int64 (len (_ecd .Stream ))));
};};return _egfa ,nil ;};

// CombineDuplicateStreams combines duplicated streams by its data hash.
// It implements interface model.Optimizer.
type CombineDuplicateStreams struct{};

// Optimize optimizes PDF objects to decrease PDF size.
func (_cffb *ObjectStreams )Optimize (objects []_b .PdfObject )(_agc []_b .PdfObject ,_accb error ){_defd :=&_b .PdfObjectStreams {};_bfffc :=make ([]_b .PdfObject ,0,len (objects ));for _ ,_abf :=range objects {if _abc ,_cbf :=_abf .(*_b .PdfIndirectObject );
_cbf &&_abc .GenerationNumber ==0{_defd .Append (_abf );}else {_bfffc =append (_bfffc ,_abf );};};if _defd .Len ()==0{return _bfffc ,nil ;};_agc =make ([]_b .PdfObject ,0,len (_bfffc )+_defd .Len ()+1);if _defd .Len ()> 1{_agc =append (_agc ,_defd );};
_agc =append (_agc ,_defd .Elements ()...);_agc =append (_agc ,_bfffc ...);return _agc ,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 _affcg (_fdb _b .PdfObject )(_gee string ,_bcf []_b .PdfObject ){var _dfbc _c .Buffer ;switch _eacg :=_fdb .(type ){case *_b .PdfIndirectObject :_bcf =append (_bcf ,_eacg );_fdb =_eacg .PdfObject ;};switch _fde :=_fdb .(type ){case *_b .PdfObjectStream :if _dcdf ,_eeed :=_b .DecodeStream (_fde );
_eeed ==nil {_dfbc .Write (_dcdf );_bcf =append (_bcf ,_fde );};case *_b .PdfObjectArray :for _ ,_adfcc :=range _fde .Elements (){switch _eeb :=_adfcc .(type ){case *_b .PdfObjectStream :if _gfab ,_fbbf :=_b .DecodeStream (_eeb );_fbbf ==nil {_dfbc .Write (_gfab );
_bcf =append (_bcf ,_eeb );};};};};return _dfbc .String (),_bcf ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_eg *Chain )Optimize (objects []_b .PdfObject )(_db []_b .PdfObject ,_dd error ){_db =objects ;for _ ,_bff :=range _eg ._df {_db ,_dd =_bff .Optimize (_db );if _dd !=nil {return _db ,_dd ;};};return _db ,nil ;};

// CombineIdenticalIndirectObjects combines identical indirect objects.
// It implements interface model.Optimizer.
type CombineIdenticalIndirectObjects struct{};type content struct{_gabe string ;_bcc *_fd .PdfPageResources ;};

// 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 ;};func _dfe (_dac []_b .PdfObject )(_eed map[*_b .PdfObjectStream ]struct{},_dba error ){_eed =map[*_b .PdfObjectStream ]struct{}{};_gff :=map[*_fd .PdfFont ]struct{}{};_ff :=_beed (_dac );for _ ,_ea :=range _ff ._bcbf {_cg ,_ed :=_b .GetDict (_ea .PdfObject );
if !_ed {continue ;};_bc ,_ed :=_b .GetDict (_cg .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));if !_ed {continue ;};_dgc ,_ :=_affcg (_cg .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_bea ,_eb :=_fd .NewPdfPageResourcesFromDict (_bc );
if _eb !=nil {return nil ,_eb ;};_abg :=[]content {{_gabe :_dgc ,_bcc :_bea }};_deb :=_aa (_cg .Get ("\u0041\u006e\u006e\u006f\u0074\u0073"));if _deb !=nil {_abg =append (_abg ,_deb ...);};for _ ,_gb :=range _abg {_gde ,_cdc :=_g .NewFromContents (_gb ._gabe ,_gb ._bcc );
if _cdc !=nil {return nil ,_cdc ;};_cgd ,_ ,_ ,_cdc :=_gde .ExtractPageText ();if _cdc !=nil {return nil ,_cdc ;};for _ ,_gaf :=range _cgd .Marks ().Elements (){if _gaf .Font ==nil {continue ;};if _ ,_fdcb :=_gff [_gaf .Font ];!_fdcb {_gff [_gaf .Font ]=struct{}{};
};};};};_eag :=map[*_b .PdfObjectStream ][]*_fd .PdfFont {};for _gfb :=range _gff {_dcd :=_gfb .FontDescriptor ();if _dcd ==nil ||_dcd .FontFile2 ==nil {continue ;};_dbed ,_ec :=_b .GetStream (_dcd .FontFile2 );if !_ec {continue ;};_eag [_dbed ]=append (_eag [_dbed ],_gfb );
};for _ega :=range _eag {var _dca []rune ;var _abba []_d .GlyphIndex ;for _ ,_dfd :=range _eag [_ega ]{switch _bad :=_dfd .Encoder ().(type ){case *_bf .IdentityEncoder :_geaf :=_bad .RegisteredRunes ();_deg :=make ([]_d .GlyphIndex ,len (_geaf ));for _bg ,_bbd :=range _geaf {_deg [_bg ]=_d .GlyphIndex (_bbd );
};_abba =append (_abba ,_deg ...);case *_bf .TrueTypeFontEncoder :_bfa :=_bad .RegisteredRunes ();_dca =append (_dca ,_bfa ...);case _bf .SimpleEncoder :_gfe :=_bad .Charcodes ();for _ ,_ffg :=range _gfe {_gafb ,_dfef :=_bad .CharcodeToRune (_ffg );if !_dfef {_ac .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",_ffg );
continue ;};_dca =append (_dca ,_gafb );};};};_dba =_bada (_ega ,_dca ,_abba );if _dba !=nil {_ac .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",_dba );
return nil ,_dba ;};_eed [_ega ]=struct{}{};};return _eed ,nil ;};type objectStructure struct{_fdfda *_b .PdfObjectDictionary ;_gdc *_b .PdfObjectDictionary ;_bcbf []*_b .PdfIndirectObject ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_aged *ImagePPI )Optimize (objects []_b .PdfObject )(_fea []_b .PdfObject ,_beb error ){if _aged .ImageUpperPPI <=0{return objects ,nil ;};_gbcd :=_eda (objects );if len (_gbcd )==0{return objects ,nil ;};_fee :=make (map[_b .PdfObject ]struct{});
for _ ,_fcb :=range _gbcd {_cbacd :=_fcb .Stream .PdfObjectDictionary .Get (_b .PdfObjectName ("\u0053\u004d\u0061s\u006b"));_fee [_cbacd ]=struct{}{};};_aef :=make (map[*_b .PdfObjectStream ]*imageInfo );for _ ,_aag :=range _gbcd {_aef [_aag .Stream ]=_aag ;
};var _dfb *_b .PdfObjectDictionary ;for _ ,_aefa :=range objects {if _dgb ,_cfbg :=_b .GetDict (_aefa );_dfb ==nil &&_cfbg {if _befb ,_fbg :=_b .GetName (_dgb .Get (_b .PdfObjectName ("\u0054\u0079\u0070\u0065")));_fbg &&*_befb =="\u0043a\u0074\u0061\u006c\u006f\u0067"{_dfb =_dgb ;
};};};if _dfb ==nil {return objects ,nil ;};_gdfa ,_egfae :=_b .GetDict (_dfb .Get (_b .PdfObjectName ("\u0050\u0061\u0067e\u0073")));if !_egfae {return objects ,nil ;};_def ,_gcea :=_b .GetArray (_gdfa .Get (_b .PdfObjectName ("\u004b\u0069\u0064\u0073")));
if !_gcea {return objects ,nil ;};_bgac :=make (map[string ]*imageInfo );for _ ,_gced :=range _def .Elements (){_ccc ,_dda :=_b .GetDict (_gced );if !_dda {continue ;};_cecc ,_efaf :=_b .GetArray (_ccc .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));
if !_efaf {continue ;};_abbg ,_cfd :=_b .GetDict (_ccc .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));if !_cfd {continue ;};_cabc ,_dfc :=_b .GetDict (_abbg .Get ("\u0058O\u0062\u006a\u0065\u0063\u0074"));if !_dfc {continue ;};_dega :=_cabc .Keys ();
for _ ,_fabd :=range _dega {if _gfac ,_ffaf :=_b .GetStream (_cabc .Get (_fabd ));_ffaf {if _bdc ,_fbbd :=_aef [_gfac ];_fbbd {_bgac [string (_fabd )]=_bdc ;};};};for _ ,_dcbc :=range _cecc .Elements (){if _eaa ,_gccf :=_b .GetStream (_dcbc );_gccf {_debb ,_dcc :=_b .NewEncoderFromStream (_eaa );
if _dcc !=nil {return nil ,_dcc ;};_dgd ,_dcc :=_debb .DecodeStream (_eaa );if _dcc !=nil {return nil ,_dcc ;};_adfc :=_bb .NewContentStreamParser (string (_dgd ));_baf ,_dcc :=_adfc .Parse ();if _dcc !=nil {return nil ,_dcc ;};_adfbd ,_dcbg :=1.0,1.0;
for _ ,_cffg :=range *_baf {if _cffg .Operand =="\u0051"{_adfbd ,_dcbg =1.0,1.0;};if _cffg .Operand =="\u0063\u006d"&&len (_cffg .Params )==6{if _ebff ,_bdcb :=_b .GetFloatVal (_cffg .Params [0]);_bdcb {_adfbd =_adfbd *_ebff ;};if _egfac ,_agb :=_b .GetFloatVal (_cffg .Params [3]);
_agb {_dcbg =_dcbg *_egfac ;};if _fff ,_fabb :=_b .GetIntVal (_cffg .Params [0]);_fabb {_adfbd =_adfbd *float64 (_fff );};if _dfbb ,_aad :=_b .GetIntVal (_cffg .Params [3]);_aad {_dcbg =_dcbg *float64 (_dfbb );};};if _cffg .Operand =="\u0044\u006f"&&len (_cffg .Params )==1{_dgg ,_deaf :=_b .GetName (_cffg .Params [0]);
if !_deaf {continue ;};if _aadg ,_bebc :=_bgac [string (*_dgg )];_bebc {_acdc ,_cace :=_adfbd /72.0,_dcbg /72.0;_ebcf ,_fef :=float64 (_aadg .Width )/_acdc ,float64 (_aadg .Height )/_cace ;if _acdc ==0||_cace ==0{_ebcf =72.0;_fef =72.0;};_aadg .PPI =_f .Max (_aadg .PPI ,_ebcf );
_aadg .PPI =_f .Max (_aadg .PPI ,_fef );};};};};};};for _ ,_eedf :=range _gbcd {if _ ,_ead :=_fee [_eedf .Stream ];_ead {continue ;};if _eedf .PPI <=_aged .ImageUpperPPI {continue ;};_gdfab ,_bfag :=_fd .NewXObjectImageFromStream (_eedf .Stream );if _bfag !=nil {return nil ,_bfag ;
};var _abaf imageModifications ;_abaf .Scale =_aged .ImageUpperPPI /_eedf .PPI ;if _eedf .BitsPerComponent ==1&&_eedf .ColorComponents ==1{_caeb :=_f .Round (_eedf .PPI /_aged .ImageUpperPPI );_gbf :=_ab .NextPowerOf2 (uint (_caeb ));if _ab .InDelta (float64 (_gbf ),1/_abaf .Scale ,0.3){_abaf .Scale =float64 (1)/float64 (_gbf );
};if _ ,_aec :=_gdfab .Filter .(*_b .JBIG2Encoder );!_aec {_abaf .Encoding =_b .NewJBIG2Encoder ();};};if _bfag =_cfg (_gdfab ,_abaf );_bfag !=nil {_ac .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",_bfag );
continue ;};_abaf .Encoding =nil ;if _gccg ,_bbce :=_b .GetStream (_eedf .Stream .PdfObjectDictionary .Get (_b .PdfObjectName ("\u0053\u004d\u0061s\u006b")));_bbce {_gdg ,_gbg :=_fd .NewXObjectImageFromStream (_gccg );if _gbg !=nil {return nil ,_gbg ;};
if _gbg =_cfg (_gdg ,_abaf );_gbg !=nil {return nil ,_gbg ;};};};return objects ,nil ;};func _cfg (_caf *_fd .XObjectImage ,_bgff imageModifications )error {_bge ,_fgb :=_caf .ToImage ();if _fgb !=nil {return _fgb ;};if _bgff .Scale !=0{_bge ,_fgb =_ffag (_bge ,_bgff .Scale );
if _fgb !=nil {return _fgb ;};};if _bgff .Encoding !=nil {_caf .Filter =_bgff .Encoding ;};_edd :=_b .MakeDict ();_edd .Set ("\u0051u\u0061\u006c\u0069\u0074\u0079",_b .MakeInteger (100));_edd .Set ("\u0050r\u0065\u0064\u0069\u0063\u0074\u006fr",_b .MakeInteger (1));
_caf .Decode =nil ;if _fgb =_caf .SetImage (_bge ,nil );_fgb !=nil {return _fgb ;};_caf .ToPdfObject ();return nil ;};func _cc (_ce *_b .PdfObjectStream )error {_gg ,_af :=_b .DecodeStream (_ce );if _af !=nil {return _af ;};_bda :=_bb .NewContentStreamParser (string (_gg ));
_dcb ,_af :=_bda .Parse ();if _af !=nil {return _af ;};_dcb =_cd (_dcb );_ddc :=_dcb .Bytes ();if len (_ddc )>=len (_gg ){return nil ;};_cf ,_af :=_b .MakeStream (_dcb .Bytes (),_b .NewFlateEncoder ());if _af !=nil {return _af ;};_ce .Stream =_cf .Stream ;
_ce .Merge (_cf .PdfObjectDictionary );return nil ;};func _eaf (_ggc []_b .PdfObject ){for _abafb ,_geg :=range _ggc {switch _bca :=_geg .(type ){case *_b .PdfIndirectObject :_bca .ObjectNumber =int64 (_abafb +1);_bca .GenerationNumber =0;case *_b .PdfObjectStream :_bca .ObjectNumber =int64 (_abafb +1);
_bca .GenerationNumber =0;case *_b .PdfObjectStreams :_bca .ObjectNumber =int64 (_abafb +1);_bca .GenerationNumber =0;};};};

// Optimize optimizes PDF objects to decrease PDF size.
func (_gffb *CombineDuplicateStreams )Optimize (objects []_b .PdfObject )(_gae []_b .PdfObject ,_dec error ){_aed :=make (map[_b .PdfObject ]_b .PdfObject );_afbc :=make (map[_b .PdfObject ]struct{});_ebf :=make (map[string ][]*_b .PdfObjectStream );for _ ,_bgfa :=range objects {if _efa ,_acc :=_bgfa .(*_b .PdfObjectStream );
_acc {_cgea :=_bd .New ();_cgea .Write (_efa .Stream );_dbf :=string (_cgea .Sum (nil ));_ebf [_dbf ]=append (_ebf [_dbf ],_efa );};};for _ ,_cdf :=range _ebf {if len (_cdf )< 2{continue ;};_fab :=_cdf [0];for _abe :=1;_abe < len (_cdf );_abe ++{_bbc :=_cdf [_abe ];
_aed [_bbc ]=_fab ;_afbc [_bbc ]=struct{}{};};};_gae =make ([]_b .PdfObject ,0,len (objects )-len (_afbc ));for _ ,_efb :=range objects {if _ ,_efg :=_afbc [_efb ];_efg {continue ;};_gae =append (_gae ,_efb );};_adg (_gae ,_aed );return _gae ,nil ;};

// CompressStreams compresses uncompressed streams.
// It implements interface model.Optimizer.
type CompressStreams struct{};

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

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