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 (_fb "bytes";_be "crypto/md5";_ce "errors";_fg "github.com/unidoc/unipdf/v3/common";_d "github.com/unidoc/unipdf/v3/contentstream";_e "github.com/unidoc/unipdf/v3/core";_bef "github.com/unidoc/unipdf/v3/extractor";_ec "github.com/unidoc/unipdf/v3/internal/imageutil";
_f "github.com/unidoc/unipdf/v3/internal/textencoding";_a "github.com/unidoc/unipdf/v3/model";_ba "github.com/unidoc/unitype";_c "golang.org/x/image/draw";_g "math";);

// CombineIdenticalIndirectObjects combines identical indirect objects.
// It implements interface model.Optimizer.
type CombineIdenticalIndirectObjects struct{};type imageInfo struct{ColorSpace _e .PdfObjectName ;BitsPerComponent int ;ColorComponents int ;Width int ;Height int ;Stream *_e .PdfObjectStream ;PPI float64 ;};

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

// Optimize optimizes PDF objects to decrease PDF size.
func (_ac *Chain )Optimize (objects []_e .PdfObject )(_db []_e .PdfObject ,_de error ){_db =objects ;for _ ,_ca :=range _ac ._fe {_db ,_de =_ca .Optimize (_db );if _de !=nil {return _db ,_de ;};};return _db ,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{};

// Optimize optimizes PDF objects to decrease PDF size.
func (_dgd *CleanContentstream )Optimize (objects []_e .PdfObject )(_cf []_e .PdfObject ,_gf error ){_ef :=map[*_e .PdfObjectStream ]struct{}{};var _fa []*_e .PdfObjectStream ;_dbg :=func (_df *_e .PdfObjectStream ){if _ ,_fd :=_ef [_df ];!_fd {_ef [_df ]=struct{}{};
_fa =append (_fa ,_df );};};for _ ,_gff :=range objects {switch _gbef :=_gff .(type ){case *_e .PdfIndirectObject :switch _bf :=_gbef .PdfObject .(type ){case *_e .PdfObjectDictionary :if _aa ,_fcb :=_e .GetName (_bf .Get ("\u0054\u0079\u0070\u0065"));
!_fcb ||_aa .String ()!="\u0050\u0061\u0067\u0065"{continue ;};if _bae ,_dc :=_e .GetStream (_bf .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_dc {_dbg (_bae );}else if _dgc ,_bde :=_e .GetArray (_bf .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));
_bde {for _ ,_fge :=range _dgc .Elements (){if _bfa ,_gd :=_e .GetStream (_fge );_gd {_dbg (_bfa );};};};};case *_e .PdfObjectStream :if _afa ,_ge :=_e .GetName (_gbef .Get ("\u0054\u0079\u0070\u0065"));!_ge ||_afa .String ()!="\u0058O\u0062\u006a\u0065\u0063\u0074"{continue ;
};if _aac ,_gdd :=_e .GetName (_gbef .Get ("\u0053u\u0062\u0074\u0079\u0070\u0065"));!_gdd ||_aac .String ()!="\u0046\u006f\u0072\u006d"{continue ;};_dbg (_gbef );};};for _ ,_bfd :=range _fa {_gf =_afg (_bfd );if _gf !=nil {return nil ,_gf ;};};return objects ,nil ;
};func _eae (_ed []_e .PdfObject )(_dee map[*_e .PdfObjectStream ]struct{},_aag error ){_dee =map[*_e .PdfObjectStream ]struct{}{};_gbee :=map[*_a .PdfFont ]struct{}{};_fdc :=_fdf (_ed );for _ ,_afd :=range _fdc ._ddc {_gbb ,_ffg :=_e .GetDict (_afd .PdfObject );
if !_ffg {continue ;};_bda ,_ffg :=_e .GetDict (_gbb .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));if !_ffg {continue ;};_eac ,_ :=_edcc (_gbb .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_cd ,_ecg :=_a .NewPdfPageResourcesFromDict (_bda );
if _ecg !=nil {return nil ,_ecg ;};_gee :=[]content {{_fgc :_eac ,_ebd :_cd }};_cag :=_gag (_gbb .Get ("\u0041\u006e\u006e\u006f\u0074\u0073"));if _cag !=nil {_gee =append (_gee ,_cag ...);};for _ ,_ae :=range _gee {_dd ,_ecf :=_bef .NewFromContents (_ae ._fgc ,_ae ._ebd );
if _ecf !=nil {return nil ,_ecf ;};_eca ,_ ,_ ,_ecf :=_dd .ExtractPageText ();if _ecf !=nil {return nil ,_ecf ;};for _ ,_ede :=range _eca .Marks ().Elements (){if _ede .Font ==nil {continue ;};if _ ,_aef :=_gbee [_ede .Font ];!_aef {_gbee [_ede .Font ]=struct{}{};
};};};};_ggc :=map[*_e .PdfObjectStream ][]*_a .PdfFont {};for _ggb :=range _gbee {_fdb :=_ggb .FontDescriptor ();if _fdb ==nil ||_fdb .FontFile2 ==nil {continue ;};_deg ,_eda :=_e .GetStream (_fdb .FontFile2 );if !_eda {continue ;};_ggc [_deg ]=append (_ggc [_deg ],_ggb );
};for _eea :=range _ggc {var _fcbf []rune ;var _ggd []_ba .GlyphIndex ;for _ ,_geg :=range _ggc [_eea ]{switch _cce :=_geg .Encoder ().(type ){case *_f .IdentityEncoder :_fdce :=_cce .RegisteredRunes ();_fed :=make ([]_ba .GlyphIndex ,len (_fdce ));for _bdc ,_eb :=range _fdce {_fed [_bdc ]=_ba .GlyphIndex (_eb );
};_ggd =append (_ggd ,_fed ...);case *_f .TrueTypeFontEncoder :_degc :=_cce .RegisteredRunes ();_fcbf =append (_fcbf ,_degc ...);case _f .SimpleEncoder :_dge :=_cce .Charcodes ();for _ ,_cac :=range _dge {_dcf ,_faf :=_cce .CharcodeToRune (_cac );if !_faf {_fg .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",_cac );
continue ;};_fcbf =append (_fcbf ,_dcf );};};};_aag =_ffc (_eea ,_fcbf ,_ggd );if _aag !=nil {_fg .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",_aag );
return nil ,_aag ;};_dee [_eea ]=struct{}{};};return _dee ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_efgf *ObjectStreams )Optimize (objects []_e .PdfObject )(_egab []_e .PdfObject ,_eaaa error ){_cgfb :=&_e .PdfObjectStreams {};_cfb :=make ([]_e .PdfObject ,0,len (objects ));for _ ,_gfd :=range objects {if _gdfe ,_fea :=_gfd .(*_e .PdfIndirectObject );
_fea &&_gdfe .GenerationNumber ==0{_cgfb .Append (_gfd );}else {_cfb =append (_cfb ,_gfd );};};if _cgfb .Len ()==0{return _cfb ,nil ;};_egab =make ([]_e .PdfObject ,0,len (_cfb )+_cgfb .Len ()+1);if _cgfb .Len ()> 1{_egab =append (_egab ,_cgfb );};_egab =append (_egab ,_cgfb .Elements ()...);
_egab =append (_egab ,_cfb ...);return _egab ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_ceg *CompressStreams )Optimize (objects []_e .PdfObject )(_eeeb []_e .PdfObject ,_baf error ){_eeeb =make ([]_e .PdfObject ,len (objects ));copy (_eeeb ,objects );for _ ,_ggba :=range objects {_gge ,_cae :=_e .GetStream (_ggba );if !_cae {continue ;
};if _fab :=_gge .Get ("\u0046\u0069\u006c\u0074\u0065\u0072");_fab !=nil {if _ ,_feb :=_e .GetName (_fab );_feb {continue ;};if _fedc ,_dead :=_e .GetArray (_fab );_dead &&_fedc .Len ()> 0{continue ;};};_ccab :=_e .NewFlateEncoder ();var _dbbf []byte ;
_dbbf ,_baf =_ccab .EncodeBytes (_gge .Stream );if _baf !=nil {return _eeeb ,_baf ;};_cadb :=_ccab .MakeStreamDict ();if len (_dbbf )+len (_cadb .WriteString ())< len (_gge .Stream ){_gge .Stream =_dbbf ;_gge .PdfObjectDictionary .Merge (_cadb );_gge .PdfObjectDictionary .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_e .MakeInteger (int64 (len (_gge .Stream ))));
};};return _eeeb ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_ffe *CleanFonts )Optimize (objects []_e .PdfObject )(_bg []_e .PdfObject ,_edf error ){var _eba map[*_e .PdfObjectStream ]struct{};if _ffe .Subset {var _dcc error ;_eba ,_dcc =_eae (objects );if _dcc !=nil {return nil ,_dcc ;};};for _ ,_ddg :=range objects {_edfc ,_fcf :=_e .GetStream (_ddg );
if !_fcf {continue ;};if _ ,_agc :=_eba [_edfc ];_agc {continue ;};_cdd ,_dca :=_e .NewEncoderFromStream (_edfc );if _dca !=nil {_fg .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",_dca );
continue ;};_agg ,_dca :=_cdd .DecodeStream (_edfc );if _dca !=nil {_fg .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",_dca );
continue ;};if len (_agg )< 4{continue ;};_ffcc :=string (_agg [:4]);if _ffcc =="\u004f\u0054\u0054\u004f"{continue ;};if _ffcc !="\u0000\u0001\u0000\u0000"&&_ffcc !="\u0074\u0072\u0075\u0065"{continue ;};_fbf ,_dca :=_ba .Parse (_fb .NewReader (_agg ));
if _dca !=nil {_fg .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",_dca );continue ;};_dca =_fbf .Optimize ();
if _dca !=nil {continue ;};var _cebe _fb .Buffer ;_dca =_fbf .Write (&_cebe );if _dca !=nil {_fg .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",_dca );
continue ;};if _cebe .Len ()> len (_agg ){_fg .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 ;};_dde ,_dca :=_e .MakeStream (_cebe .Bytes (),_e .NewFlateEncoder ());if _dca !=nil {continue ;};*_edfc =*_dde ;_edfc .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_e .MakeInteger (int64 (_cebe .Len ())));};return objects ,nil ;};

// New creates a optimizers chain from options.
func New (options Options )*Chain {_aefe :=new (Chain );if options .CleanFonts ||options .SubsetFonts {_aefe .Append (&CleanFonts {Subset :options .SubsetFonts });};if options .CleanContentstream {_aefe .Append (new (CleanContentstream ));};if options .ImageUpperPPI > 0{_beeb :=new (ImagePPI );
_beeb .ImageUpperPPI =options .ImageUpperPPI ;_aefe .Append (_beeb );};if options .ImageQuality > 0{_adegg :=new (Image );_adegg .ImageQuality =options .ImageQuality ;_aefe .Append (_adegg );};if options .CombineDuplicateDirectObjects {_aefe .Append (new (CombineDuplicateDirectObjects ));
};if options .CombineDuplicateStreams {_aefe .Append (new (CombineDuplicateStreams ));};if options .CombineIdenticalIndirectObjects {_aefe .Append (new (CombineIdenticalIndirectObjects ));};if options .UseObjectStreams {_aefe .Append (new (ObjectStreams ));
};if options .CompressStreams {_aefe .Append (new (CompressStreams ));};return _aefe ;};func _af (_cba *_d .ContentStreamOperations )*_d .ContentStreamOperations {if _cba ==nil {return nil ;};_gb :=_d .ContentStreamOperations {};for _ ,_bd :=range *_cba {switch _bd .Operand {case "\u0042\u0044\u0043","\u0042\u004d\u0043","\u0045\u004d\u0043":continue ;
case "\u0054\u006d":if len (_bd .Params )==6{if _ab ,_ga :=_e .GetNumbersAsFloat (_bd .Params );_ga ==nil {if _ab [0]==1&&_ab [1]==0&&_ab [2]==0&&_ab [3]==1{_bd =&_d .ContentStreamOperation {Params :[]_e .PdfObject {_bd .Params [4],_bd .Params [5]},Operand :"\u0054\u0064"};
};};};};_gb =append (_gb ,_bd );};return &_gb ;};

// Append appends optimizers to the chain.
func (_cb *Chain )Append (optimizers ..._a .Optimizer ){_cb ._fe =append (_cb ._fe ,optimizers ...)};type content struct{_fgc string ;_ebd *_a .PdfPageResources ;};func _afgf (_deed []_e .PdfObject ){for _aacbc ,_gbgf :=range _deed {switch _dcab :=_gbgf .(type ){case *_e .PdfIndirectObject :_dcab .ObjectNumber =int64 (_aacbc +1);
_dcab .GenerationNumber =0;case *_e .PdfObjectStream :_dcab .ObjectNumber =int64 (_aacbc +1);_dcab .GenerationNumber =0;case *_e .PdfObjectStreams :_dcab .ObjectNumber =int64 (_aacbc +1);_dcab .GenerationNumber =0;};};};

// 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 ;};type imageModifications struct{Scale float64 ;Encoding _e .StreamEncoder ;};

// CombineDuplicateDirectObjects combines duplicated direct objects by its data hash.
// It implements interface model.Optimizer.
type CombineDuplicateDirectObjects struct{};func _gag (_bc _e .PdfObject )[]content {if _bc ==nil {return nil ;};_eadc ,_eee :=_e .GetArray (_bc );if !_eee {_fg .Log .Debug ("\u0041\u006e\u006e\u006fts\u0020\u006e\u006f\u0074\u0020\u0061\u006e\u0020\u0061\u0072\u0072\u0061\u0079");
return nil ;};var _dgg []content ;for _ ,_fgf :=range _eadc .Elements (){_eg ,_bcg :=_e .GetDict (_fgf );if !_bcg {_fg .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 ;};_eedd ,_bcg :=_e .GetDict (_eg .Get ("\u0041\u0050"));if !_bcg {_fg .Log .Debug ("\u004e\u006f\u0020\u0041P \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_ebc :=_e .TraceToDirectObject (_eedd .Get ("\u004e"));
if _ebc ==nil {_fg .Log .Debug ("N\u006f\u0020\u004e\u0020en\u0074r\u0079\u0020\u002d\u0020\u0073k\u0069\u0070\u0070\u0069\u006e\u0067");continue ;};var _cad *_e .PdfObjectStream ;switch _ccd :=_ebc .(type ){case *_e .PdfObjectDictionary :_dgf ,_dab :=_e .GetName (_eg .Get ("\u0041\u0053"));
if !_dab {_fg .Log .Debug ("\u004e\u006f\u0020\u0041S \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_cad ,_dab =_e .GetStream (_ccd .Get (*_dgf ));if !_dab {_fg .Log .Debug ("\u0046o\u0072\u006d\u0020\u006eo\u0074\u0020\u0066\u006f\u0075n\u0064 \u002d \u0073\u006b\u0069\u0070\u0070\u0069\u006eg");
continue ;};case *_e .PdfObjectStream :_cad =_ccd ;};if _cad ==nil {_fg .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 ;};_dea ,_ggg :=_a .NewXObjectFormFromStream (_cad );if _ggg !=nil {_fg .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",_ggg );
continue ;};_cbg ,_ggg :=_dea .GetContentStream ();if _ggg !=nil {_fg .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",_ggg );continue ;};_dgg =append (_dgg ,content {_fgc :string (_cbg ),_ebd :_dea .Resources });
};return _dgg ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_adge *ImagePPI )Optimize (objects []_e .PdfObject )(_ddfd []_e .PdfObject ,_deae error ){if _adge .ImageUpperPPI <=0{return objects ,nil ;};_ccaba :=_daa (objects );if len (_ccaba )==0{return objects ,nil ;};_dacd :=make (map[_e .PdfObject ]struct{});
for _ ,_dcfc :=range _ccaba {_ecff :=_dcfc .Stream .PdfObjectDictionary .Get (_e .PdfObjectName ("\u0053\u004d\u0061s\u006b"));_dacd [_ecff ]=struct{}{};};_egbg :=make (map[*_e .PdfObjectStream ]*imageInfo );for _ ,_geb :=range _ccaba {_egbg [_geb .Stream ]=_geb ;
};var _cbef *_e .PdfObjectDictionary ;for _ ,_fcbc :=range objects {if _faacd ,_bee :=_e .GetDict (_fcbc );_cbef ==nil &&_bee {if _aca ,_gbc :=_e .GetName (_faacd .Get (_e .PdfObjectName ("\u0054\u0079\u0070\u0065")));_gbc &&*_aca =="\u0043a\u0074\u0061\u006c\u006f\u0067"{_cbef =_faacd ;
};};};if _cbef ==nil {return objects ,nil ;};_fgeb ,_dfa :=_e .GetDict (_cbef .Get (_e .PdfObjectName ("\u0050\u0061\u0067e\u0073")));if !_dfa {return objects ,nil ;};_acg ,_ccgg :=_e .GetArray (_fgeb .Get (_e .PdfObjectName ("\u004b\u0069\u0064\u0073")));
if !_ccgg {return objects ,nil ;};_aacb :=make (map[string ]*imageInfo );for _ ,_gagg :=range _acg .Elements (){_beb ,_fba :=_e .GetDict (_gagg );if !_fba {continue ;};_degcg ,_egd :=_e .GetArray (_beb .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));
if !_egd {continue ;};_dba ,_bcfa :=_e .GetDict (_beb .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));if !_bcfa {continue ;};_ebbf ,_bdef :=_e .GetDict (_dba .Get ("\u0058O\u0062\u006a\u0065\u0063\u0074"));if !_bdef {continue ;};_afdf :=_ebbf .Keys ();
for _ ,_eeef :=range _afdf {if _ece ,_cdbb :=_e .GetStream (_ebbf .Get (_eeef ));_cdbb {if _acgf ,_gbbg :=_egbg [_ece ];_gbbg {_aacb [string (_eeef )]=_acgf ;};};};for _ ,_cddg :=range _degcg .Elements (){if _bdfc ,_ecaf :=_e .GetStream (_cddg );_ecaf {_affd ,_bff :=_e .NewEncoderFromStream (_bdfc );
if _bff !=nil {return nil ,_bff ;};_bbf ,_bff :=_affd .DecodeStream (_bdfc );if _bff !=nil {return nil ,_bff ;};_gdb :=_d .NewContentStreamParser (string (_bbf ));_daed ,_bff :=_gdb .Parse ();if _bff !=nil {return nil ,_bff ;};_acdf ,_dbgb :=1.0,1.0;for _ ,_fbbd :=range *_daed {if _fbbd .Operand =="\u0051"{_acdf ,_dbgb =1.0,1.0;
};if _fbbd .Operand =="\u0063\u006d"&&len (_fbbd .Params )==6{if _fcc ,_bgde :=_e .GetFloatVal (_fbbd .Params [0]);_bgde {_acdf =_acdf *_fcc ;};if _ecd ,_gfg :=_e .GetFloatVal (_fbbd .Params [3]);_gfg {_dbgb =_dbgb *_ecd ;};if _fdcf ,_gggf :=_e .GetIntVal (_fbbd .Params [0]);
_gggf {_acdf =_acdf *float64 (_fdcf );};if _bed ,_ddfe :=_e .GetIntVal (_fbbd .Params [3]);_ddfe {_dbgb =_dbgb *float64 (_bed );};};if _fbbd .Operand =="\u0044\u006f"&&len (_fbbd .Params )==1{_dcge ,_daea :=_e .GetName (_fbbd .Params [0]);if !_daea {continue ;
};if _dbae ,_eaee :=_aacb [string (*_dcge )];_eaee {_bacg ,_ddbe :=_acdf /72.0,_dbgb /72.0;_cbga ,_edee :=float64 (_dbae .Width )/_bacg ,float64 (_dbae .Height )/_ddbe ;if _bacg ==0||_ddbe ==0{_cbga =72.0;_edee =72.0;};_dbae .PPI =_g .Max (_dbae .PPI ,_cbga );
_dbae .PPI =_g .Max (_dbae .PPI ,_edee );};};};};};};for _ ,_ddbf :=range _ccaba {if _ ,_fgaee :=_dacd [_ddbf .Stream ];_fgaee {continue ;};if _ddbf .PPI <=_adge .ImageUpperPPI {continue ;};_fcbb ,_afge :=_a .NewXObjectImageFromStream (_ddbf .Stream );
if _afge !=nil {return nil ,_afge ;};var _bgdg imageModifications ;_bgdg .Scale =_adge .ImageUpperPPI /_ddbf .PPI ;if _ddbf .BitsPerComponent ==1&&_ddbf .ColorComponents ==1{_gacb :=_g .Round (_ddbf .PPI /_adge .ImageUpperPPI );_cdbc :=_ec .NextPowerOf2 (uint (_gacb ));
if _ec .InDelta (float64 (_cdbc ),1/_bgdg .Scale ,0.3){_bgdg .Scale =float64 (1)/float64 (_cdbc );};if _ ,_dbbfg :=_fcbb .Filter .(*_e .JBIG2Encoder );!_dbbfg {_bgdg .Encoding =_e .NewJBIG2Encoder ();};};if _afge =_fbbc (_fcbb ,_bgdg );_afge !=nil {_fg .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",_afge );
continue ;};_bgdg .Encoding =nil ;if _afb ,_fedff :=_e .GetStream (_ddbf .Stream .PdfObjectDictionary .Get (_e .PdfObjectName ("\u0053\u004d\u0061s\u006b")));_fedff {_ecdg ,_afab :=_a .NewXObjectImageFromStream (_afb );if _afab !=nil {return nil ,_afab ;
};if _afab =_fbbc (_ecdg ,_bgdg );_afab !=nil {return nil ,_afab ;};};};return objects ,nil ;};

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

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

// Optimize optimizes PDF objects to decrease PDF size.
func (_adg *CombineDuplicateDirectObjects )Optimize (objects []_e .PdfObject )(_gbg []_e .PdfObject ,_cde error ){_afgf (objects );_ade :=make (map[string ][]*_e .PdfObjectDictionary );var _fbb func (_cbe *_e .PdfObjectDictionary );_fbb =func (_bdcd *_e .PdfObjectDictionary ){for _ ,_fgb :=range _bdcd .Keys (){_ebcf :=_bdcd .Get (_fgb );
if _abg ,_gce :=_ebcf .(*_e .PdfObjectDictionary );_gce {_dcb :=_be .New ();_dcb .Write ([]byte (_abg .WriteString ()));_dda :=string (_dcb .Sum (nil ));_ade [_dda ]=append (_ade [_dda ],_abg );_fbb (_abg );};};};for _ ,_egg :=range objects {_bag ,_eeda :=_egg .(*_e .PdfIndirectObject );
if !_eeda {continue ;};if _aeg ,_ege :=_bag .PdfObject .(*_e .PdfObjectDictionary );_ege {_fbb (_aeg );};};_cg :=make ([]_e .PdfObject ,0,len (_ade ));_dgce :=make (map[_e .PdfObject ]_e .PdfObject );for _ ,_dcg :=range _ade {if len (_dcg )< 2{continue ;
};_cdb :=_e .MakeDict ();_cdb .Merge (_dcg [0]);_bdaf :=_e .MakeIndirectObject (_cdb );_cg =append (_cg ,_bdaf );for _aee :=0;_aee < len (_dcg );_aee ++{_agb :=_dcg [_aee ];_dgce [_agb ]=_bdaf ;};};_gbg =make ([]_e .PdfObject ,len (objects ));copy (_gbg ,objects );
_gbg =append (_cg ,_gbg ...);_cbefd (_gbg ,_dgce );return _gbg ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_cfc *CombineDuplicateStreams )Optimize (objects []_e .PdfObject )(_cca []_e .PdfObject ,_acd error ){_gaf :=make (map[_e .PdfObject ]_e .PdfObject );_cdg :=make (map[_e .PdfObject ]struct{});_cda :=make (map[string ][]*_e .PdfObjectStream );for _ ,_add :=range objects {if _cgc ,_abe :=_add .(*_e .PdfObjectStream );
_abe {_ceeg :=_be .New ();_ceeg .Write (_cgc .Stream );_ceeg .Write ([]byte (_cgc .PdfObjectDictionary .WriteString ()));_dga :=string (_ceeg .Sum (nil ));_cda [_dga ]=append (_cda [_dga ],_cgc );};};for _ ,_adeg :=range _cda {if len (_adeg )< 2{continue ;
};_fga :=_adeg [0];for _bdca :=1;_bdca < len (_adeg );_bdca ++{_agcf :=_adeg [_bdca ];_gaf [_agcf ]=_fga ;_cdg [_agcf ]=struct{}{};};};_cca =make ([]_e .PdfObject ,0,len (objects )-len (_cdg ));for _ ,_efb :=range objects {if _ ,_cga :=_cdg [_efb ];_cga {continue ;
};_cca =append (_cca ,_efb );};_cbefd (_cca ,_gaf );return _cca ,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 ;};

// 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 ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_fef *Image )Optimize (objects []_e .PdfObject )(_ccg []_e .PdfObject ,_bgg error ){if _fef .ImageQuality <=0{return objects ,nil ;};_cbc :=_daa (objects );if len (_cbc )==0{return objects ,nil ;};_ggcg :=make (map[_e .PdfObject ]_e .PdfObject );
_aecc :=make (map[_e .PdfObject ]struct{});for _ ,_bdb :=range _cbc {_cgff :=_bdb .Stream .PdfObjectDictionary .Get (_e .PdfObjectName ("\u0053\u004d\u0061s\u006b"));_aecc [_cgff ]=struct{}{};};for _cab ,_eeab :=range _cbc {_fgca :=_eeab .Stream ;if _ ,_dbd :=_aecc [_fgca ];
_dbd {continue ;};_ged ,_aaa :=_e .NewEncoderFromStream (_fgca );if _aaa !=nil {_fg .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 ;};_feg ,_aaa :=_ged .DecodeStream (_fgca );if _aaa !=nil {_fg .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 ;};_dgbg :=_e .NewDCTEncoder ();_dgbg .ColorComponents =_eeab .ColorComponents ;_dgbg .Quality =_fef .ImageQuality ;_dgbg .BitsPerComponent =_eeab .BitsPerComponent ;_dgbg .Width =_eeab .Width ;_dgbg .Height =_eeab .Height ;_bgc ,_aaa :=_dgbg .EncodeBytes (_feg );
if _aaa !=nil {_fg .Log .Debug ("\u0045R\u0052\u004f\u0052\u003a\u0020\u0025v",_aaa );return nil ,_aaa ;};var _deaf _e .StreamEncoder ;_deaf =_dgbg ;{_dac :=_e .NewFlateEncoder ();_aabe :=_e .NewMultiEncoder ();_aabe .AddEncoder (_dac );_aabe .AddEncoder (_dgbg );
_aacf ,_ffcd :=_aabe .EncodeBytes (_feg );if _ffcd !=nil {return nil ,_ffcd ;};if len (_aacf )< len (_bgc ){_fg .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 (_bgc ),len (_aacf ),len (_fgca .Stream ));
_bgc =_aacf ;_deaf =_aabe ;};};_cgd :=len (_fgca .Stream );if _cgd < len (_bgc ){continue ;};_cfd :=&_e .PdfObjectStream {Stream :_bgc };_cfd .PdfObjectReference =_fgca .PdfObjectReference ;_cfd .PdfObjectDictionary =_e .MakeDict ();_cfd .Merge (_fgca .PdfObjectDictionary );
_cfd .Merge (_deaf .MakeStreamDict ());_cfd .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_e .MakeInteger (int64 (len (_bgc ))));_ggcg [_fgca ]=_cfd ;_cbc [_cab ].Stream =_cfd ;};_ccg =make ([]_e .PdfObject ,len (objects ));copy (_ccg ,objects );_cbefd (_ccg ,_ggcg );
return _ccg ,nil ;};func _afg (_gbe *_e .PdfObjectStream )error {_gc ,_fc :=_e .DecodeStream (_gbe );if _fc !=nil {return _fc ;};_dg :=_d .NewContentStreamParser (string (_gc ));_ee ,_fc :=_dg .Parse ();if _fc !=nil {return _fc ;};_ee =_af (_ee );_ag :=_ee .Bytes ();
if len (_ag )>=len (_gc ){return nil ;};_cc ,_fc :=_e .MakeStream (_ee .Bytes (),_e .NewFlateEncoder ());if _fc !=nil {return _fc ;};_gbe .Stream =_cc .Stream ;_gbe .Merge (_cc .PdfObjectDictionary );return nil ;};

// CombineDuplicateStreams combines duplicated streams by its data hash.
// It implements interface model.Optimizer.
type CombineDuplicateStreams struct{};func _gegb (_deade *_a .Image ,_ddab float64 )(*_a .Image ,error ){_bfdf ,_ccdc :=_deade .ToGoImage ();if _ccdc !=nil {return nil ,_ccdc ;};var _fac _ec .Image ;_aefg ,_gda :=_bfdf .(*_ec .Monochrome );if _gda {if _ccdc =_aefg .ResolveDecode ();
_ccdc !=nil {return nil ,_ccdc ;};_fac ,_ccdc =_aefg .Scale (_ddab );if _ccdc !=nil {return nil ,_ccdc ;};}else {_beg :=int (_g .RoundToEven (float64 (_deade .Width )*_ddab ));_dad :=int (_g .RoundToEven (float64 (_deade .Height )*_ddab ));_fac ,_ccdc =_ec .NewImage (_beg ,_dad ,int (_deade .BitsPerComponent ),_deade .ColorComponents ,nil ,nil ,nil );
if _ccdc !=nil {return nil ,_ccdc ;};_c .CatmullRom .Scale (_fac ,_fac .Bounds (),_bfdf ,_bfdf .Bounds (),_c .Over ,&_c .Options {});};_debe :=_fac .Base ();_ebb :=&_a .Image {Width :int64 (_debe .Width ),Height :int64 (_debe .Height ),BitsPerComponent :int64 (_debe .BitsPerComponent ),ColorComponents :_debe .ColorComponents ,Data :_debe .Data };
_ebb .SetDecode (_debe .Decode );_ebb .SetAlpha (_debe .Alpha );return _ebb ,nil ;};func _edcc (_gbfe _e .PdfObject )(_bfb string ,_aead []_e .PdfObject ){var _gffa _fb .Buffer ;switch _eddg :=_gbfe .(type ){case *_e .PdfIndirectObject :_aead =append (_aead ,_eddg );
_gbfe =_eddg .PdfObject ;};switch _bcb :=_gbfe .(type ){case *_e .PdfObjectStream :if _ecfa ,_cbea :=_e .DecodeStream (_bcb );_cbea ==nil {_gffa .Write (_ecfa );_aead =append (_aead ,_bcb );};case *_e .PdfObjectArray :for _ ,_ecc :=range _bcb .Elements (){switch _gbae :=_ecc .(type ){case *_e .PdfObjectStream :if _fdg ,_bedb :=_e .DecodeStream (_gbae );
_bedb ==nil {_gffa .Write (_fdg );_aead =append (_aead ,_gbae );};};};};return _gffa .String (),_aead ;};func _fdf (_eace []_e .PdfObject )objectStructure {_gffe :=objectStructure {};_dff :=false ;for _ ,_dbe :=range _eace {switch _bbff :=_dbe .(type ){case *_e .PdfIndirectObject :_fcd ,_dbec :=_e .GetDict (_bbff );
if !_dbec {continue ;};_ffgf ,_dbec :=_e .GetName (_fcd .Get ("\u0054\u0079\u0070\u0065"));if !_dbec {continue ;};switch _ffgf .String (){case "\u0043a\u0074\u0061\u006c\u006f\u0067":_gffe ._ddge =_fcd ;_dff =true ;};};if _dff {break ;};};if !_dff {return _gffe ;
};_cdaa ,_cgg :=_e .GetDict (_gffe ._ddge .Get ("\u0050\u0061\u0067e\u0073"));if !_cgg {return _gffe ;};_gffe ._cfgd =_cdaa ;_bedc ,_cgg :=_e .GetArray (_cdaa .Get ("\u004b\u0069\u0064\u0073"));if !_cgg {return _gffe ;};for _ ,_cfgc :=range _bedc .Elements (){_dfac ,_bffb :=_e .GetIndirect (_cfgc );
if !_bffb {break ;};_gffe ._ddc =append (_gffe ._ddc ,_dfac );};return _gffe ;};func _daa (_dgb []_e .PdfObject )[]*imageInfo {_ccf :=_e .PdfObjectName ("\u0053u\u0062\u0074\u0079\u0070\u0065");_ebg :=make (map[*_e .PdfObjectStream ]struct{});var _fcfa error ;
var _age []*imageInfo ;for _ ,_egf :=range _dgb {_eab ,_dgaf :=_e .GetStream (_egf );if !_dgaf {continue ;};if _ ,_ccfc :=_ebg [_eab ];_ccfc {continue ;};_ebg [_eab ]=struct{}{};_gbaa :=_eab .PdfObjectDictionary .Get (_ccf );_adb ,_dgaf :=_e .GetName (_gbaa );
if !_dgaf ||string (*_adb )!="\u0049\u006d\u0061g\u0065"{continue ;};_fgd :=&imageInfo {BitsPerComponent :8,Stream :_eab };if _fgd .ColorSpace ,_fcfa =_a .DetermineColorspaceNameFromPdfObject (_eab .PdfObjectDictionary .Get ("\u0043\u006f\u006c\u006f\u0072\u0053\u0070\u0061\u0063\u0065"));
_fcfa !=nil {_fg .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",_fcfa );continue ;};if _deb ,_cdbg :=_e .GetIntVal (_eab .PdfObjectDictionary .Get ("\u0042\u0069t\u0073\u0050\u0065r\u0043\u006f\u006d\u0070\u006f\u006e\u0065\u006e\u0074"));
_cdbg {_fgd .BitsPerComponent =_deb ;};if _cbd ,_gaa :=_e .GetIntVal (_eab .PdfObjectDictionary .Get ("\u0057\u0069\u0064t\u0068"));_gaa {_fgd .Width =_cbd ;};if _deee ,_bb :=_e .GetIntVal (_eab .PdfObjectDictionary .Get ("\u0048\u0065\u0069\u0067\u0068\u0074"));
_bb {_fgd .Height =_deee ;};switch _fgd .ColorSpace {case "\u0044e\u0076\u0069\u0063\u0065\u0052\u0047B":_fgd .ColorComponents =3;case "\u0044\u0065\u0076\u0069\u0063\u0065\u0047\u0072\u0061\u0079":_fgd .ColorComponents =1;default:_fg .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",_fgd .ColorSpace );
continue ;};_age =append (_age ,_fgd );};return _age ;};func _fbbc (_ddd *_a .XObjectImage ,_cbed imageModifications )error {_dfc ,_bdf :=_ddd .ToImage ();if _bdf !=nil {return _bdf ;};if _cbed .Scale !=0{_dfc ,_bdf =_gegb (_dfc ,_cbed .Scale );if _bdf !=nil {return _bdf ;
};};if _cbed .Encoding !=nil {_ddd .Filter =_cbed .Encoding ;};_ddb :=_e .MakeDict ();_ddb .Set ("\u0051u\u0061\u006c\u0069\u0074\u0079",_e .MakeInteger (100));_ddb .Set ("\u0050r\u0065\u0064\u0069\u0063\u0074\u006fr",_e .MakeInteger (1));_ddd .Decode =nil ;
if _bdf =_ddd .SetImage (_dfc ,nil );_bdf !=nil {return _bdf ;};_ddd .ToPdfObject ();return 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 _ffc (_gac *_e .PdfObjectStream ,_acc []rune ,_gbf []_ba .GlyphIndex )error {_gac ,_eaa :=_e .GetStream (_gac );if !_eaa {_fg .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 _ce .New ("\u0066\u006f\u006e\u0074fi\u006c\u0065\u0032\u0020\u006e\u006f\u0074\u0020\u0066\u006f\u0075\u006e\u0064");};_bac ,_aecd :=_e .DecodeStream (_gac );if _aecd !=nil {_fg .Log .Debug ("\u0044\u0065c\u006f\u0064\u0065 \u0065\u0072\u0072\u006f\u0072\u003a\u0020\u0025\u0076",_aecd );
return _aecd ;};_efa ,_aecd :=_ba .Parse (_fb .NewReader (_bac ));if _aecd !=nil {_fg .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 (_gac .Stream ));
return _aecd ;};_eed :=_gbf ;if len (_acc )> 0{_da :=_efa .LookupRunes (_acc );_eed =append (_eed ,_da ...);};_efa ,_aecd =_efa .SubsetKeepIndices (_eed );if _aecd !=nil {_fg .Log .Debug ("\u0045R\u0052\u004f\u0052\u0020s\u0075\u0062\u0073\u0065\u0074t\u0069n\u0067 \u0066\u006f\u006e\u0074\u003a\u0020\u0025v",_aecd );
return _aecd ;};var _efg _fb .Buffer ;_aecd =_efa .Write (&_efg );if _aecd !=nil {_fg .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_aecd );return _aecd ;};if _efg .Len ()> len (_bac ){_fg .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 ;};_bfdc ,_aecd :=_e .MakeStream (_efg .Bytes (),_e .NewFlateEncoder ());if _aecd !=nil {_fg .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_aecd );return _aecd ;
};*_gac =*_bfdc ;_gac .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_e .MakeInteger (int64 (_efg .Len ())));return nil ;};func _cbefd (_gea []_e .PdfObject ,_ddag map[_e .PdfObject ]_e .PdfObject ){if len (_ddag )==0{return ;};for _bge ,_gdfa :=range _gea {if _fddd ,_dce :=_ddag [_gdfa ];
_dce {_gea [_bge ]=_fddd ;continue ;};_ddag [_gdfa ]=_gdfa ;switch _bea :=_gdfa .(type ){case *_e .PdfObjectArray :_def :=make ([]_e .PdfObject ,_bea .Len ());copy (_def ,_bea .Elements ());_cbefd (_def ,_ddag );for _bgga ,_gec :=range _def {_bea .Set (_bgga ,_gec );
};case *_e .PdfObjectStreams :_cbefd (_bea .Elements (),_ddag );case *_e .PdfObjectStream :_faad :=[]_e .PdfObject {_bea .PdfObjectDictionary };_cbefd (_faad ,_ddag );_bea .PdfObjectDictionary =_faad [0].(*_e .PdfObjectDictionary );case *_e .PdfObjectDictionary :_bcc :=_bea .Keys ();
_feff :=make ([]_e .PdfObject ,len (_bcc ));for _adgb ,_acb :=range _bcc {_feff [_adgb ]=_bea .Get (_acb );};_cbefd (_feff ,_ddag );for _acce ,_dbc :=range _bcc {_bea .Set (_dbc ,_feff [_acce ]);};case *_e .PdfIndirectObject :_cdbce :=[]_e .PdfObject {_bea .PdfObject };
_cbefd (_cdbce ,_ddag );_bea .PdfObject =_cdbce [0];};};};

// Optimize optimizes PDF objects to decrease PDF size.
func (_dbb *CombineIdenticalIndirectObjects )Optimize (objects []_e .PdfObject )(_gdf []_e .PdfObject ,_aeb error ){_afgf (objects );_faa :=make (map[_e .PdfObject ]_e .PdfObject );_edc :=make (map[_e .PdfObject ]struct{});_gad :=make (map[string ][]*_e .PdfIndirectObject );
for _ ,_cfg :=range objects {_gfa ,_cdeg :=_cfg .(*_e .PdfIndirectObject );if !_cdeg {continue ;};if _gde ,_gba :=_gfa .PdfObject .(*_e .PdfObjectDictionary );_gba {if _acf ,_fca :=_gde .Get ("\u0054\u0079\u0070\u0065").(*_e .PdfObjectName );_fca &&*_acf =="\u0050\u0061\u0067\u0065"{continue ;
};_aab :=_be .New ();_aab .Write ([]byte (_gde .WriteString ()));_aff :=string (_aab .Sum (nil ));_gad [_aff ]=append (_gad [_aff ],_gfa );};};for _ ,_dae :=range _gad {if len (_dae )< 2{continue ;};_ebe :=_dae [0];for _ced :=1;_ced < len (_dae );_ced ++{_cgf :=_dae [_ced ];
_faa [_cgf ]=_ebe ;_edc [_cgf ]=struct{}{};};};_gdf =make ([]_e .PdfObject ,0,len (objects )-len (_edc ));for _ ,_cdc :=range objects {if _ ,_bcgb :=_edc [_cdc ];_bcgb {continue ;};_gdf =append (_gdf ,_cdc );};_cbefd (_gdf ,_faa );return _gdf ,nil ;};type objectStructure struct{_ddge *_e .PdfObjectDictionary ;
_cfgd *_e .PdfObjectDictionary ;_ddc []*_e .PdfIndirectObject ;};