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 (_fa "bytes";_ae "crypto/md5";_b "errors";_d "github.com/unidoc/unipdf/v3/common";_f "github.com/unidoc/unipdf/v3/contentstream";_fg "github.com/unidoc/unipdf/v3/core";_e "github.com/unidoc/unipdf/v3/extractor";_de "github.com/unidoc/unipdf/v3/internal/imageutil";
_c "github.com/unidoc/unipdf/v3/internal/textencoding";_gg "github.com/unidoc/unipdf/v3/model";_aee "github.com/unidoc/unitype";_a "golang.org/x/image/draw";_dc "math";);

// Optimize optimizes PDF objects to decrease PDF size.
func (_fe *Chain )Optimize (objects []_fg .PdfObject )(_def []_fg .PdfObject ,_bf error ){_ab :=objects ;for _ ,_dg :=range _fe ._gf {_be ,_fb :=_dg .Optimize (_ab );if _fb !=nil {_d .Log .Debug ("\u0045\u0052\u0052OR\u0020\u004f\u0070\u0074\u0069\u006d\u0069\u007a\u0061\u0074\u0069\u006f\u006e\u003a\u0020\u0025\u002b\u0076",_fb );
continue ;};_ab =_be ;};return _ab ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_fbfa *ObjectStreams )Optimize (objects []_fg .PdfObject )(_dded []_fg .PdfObject ,_caf error ){_gdf :=&_fg .PdfObjectStreams {};_bgd :=make ([]_fg .PdfObject ,0,len (objects ));for _ ,_cdb :=range objects {if _befc ,_bccg :=_cdb .(*_fg .PdfIndirectObject );
_bccg &&_befc .GenerationNumber ==0{_gdf .Append (_cdb );}else {_bgd =append (_bgd ,_cdb );};};if _gdf .Len ()==0{return _bgd ,nil ;};_dded =make ([]_fg .PdfObject ,0,len (_bgd )+_gdf .Len ()+1);if _gdf .Len ()> 1{_dded =append (_dded ,_gdf );};_dded =append (_dded ,_gdf .Elements ()...);
_dded =append (_dded ,_bgd ...);return _dded ,nil ;};func _affg (_bbbc []_fg .PdfObject ){for _eeae ,_dedc :=range _bbbc {switch _fgea :=_dedc .(type ){case *_fg .PdfIndirectObject :_fgea .ObjectNumber =int64 (_eeae +1);_fgea .GenerationNumber =0;case *_fg .PdfObjectStream :_fgea .ObjectNumber =int64 (_eeae +1);
_fgea .GenerationNumber =0;case *_fg .PdfObjectStreams :_fgea .ObjectNumber =int64 (_eeae +1);_fgea .GenerationNumber =0;};};};

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

// Optimize optimizes PDF objects to decrease PDF size.
func (_faa *CompressStreams )Optimize (objects []_fg .PdfObject )(_aba []_fg .PdfObject ,_defb error ){_aba =make ([]_fg .PdfObject ,len (objects ));copy (_aba ,objects );for _ ,_ddgg :=range objects {_cecf ,_fdc :=_fg .GetStream (_ddgg );if !_fdc {continue ;
};if _ccae :=_cecf .Get ("\u0046\u0069\u006c\u0074\u0065\u0072");_ccae !=nil {if _ ,_eadf :=_fg .GetName (_ccae );_eadf {continue ;};if _aeb ,_gga :=_fg .GetArray (_ccae );_gga &&_aeb .Len ()> 0{continue ;};};_egde :=_fg .NewFlateEncoder ();var _fggcd []byte ;
_fggcd ,_defb =_egde .EncodeBytes (_cecf .Stream );if _defb !=nil {return _aba ,_defb ;};_cbdc :=_egde .MakeStreamDict ();if len (_fggcd )+len (_cbdc .WriteString ())< len (_cecf .Stream ){_cecf .Stream =_fggcd ;_cecf .PdfObjectDictionary .Merge (_cbdc );
_cecf .PdfObjectDictionary .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_fg .MakeInteger (int64 (len (_cecf .Stream ))));};};return _aba ,nil ;};

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

// Optimize optimizes PDF objects to decrease PDF size.
func (_dec *CombineDuplicateDirectObjects )Optimize (objects []_fg .PdfObject )(_aeee []_fg .PdfObject ,_edb error ){_affg (objects );_ace :=make (map[string ][]*_fg .PdfObjectDictionary );var _ceb func (_agde *_fg .PdfObjectDictionary );_ceb =func (_feeg *_fg .PdfObjectDictionary ){for _ ,_bcgba :=range _feeg .Keys (){_fac :=_feeg .Get (_bcgba );
if _acb ,_cfb :=_fac .(*_fg .PdfObjectDictionary );_cfb {_cgg :=_ae .New ();_cgg .Write ([]byte (_acb .WriteString ()));_bfc :=string (_cgg .Sum (nil ));_ace [_bfc ]=append (_ace [_bfc ],_acb );_ceb (_acb );};};};for _ ,_caa :=range objects {_cec ,_fce :=_caa .(*_fg .PdfIndirectObject );
if !_fce {continue ;};if _degf ,_dca :=_cec .PdfObject .(*_fg .PdfObjectDictionary );_dca {_ceb (_degf );};};_cbde :=make ([]_fg .PdfObject ,0,len (_ace ));_age :=make (map[_fg .PdfObject ]_fg .PdfObject );for _ ,_gfc :=range _ace {if len (_gfc )< 2{continue ;
};_ccea :=_fg .MakeDict ();_ccea .Merge (_gfc [0]);_cceb :=_fg .MakeIndirectObject (_ccea );_cbde =append (_cbde ,_cceb );for _aed :=0;_aed < len (_gfc );_aed ++{_aaa :=_gfc [_aed ];_age [_aaa ]=_cceb ;};};_aeee =make ([]_fg .PdfObject ,len (objects ));
copy (_aeee ,objects );_aeee =append (_cbde ,_aeee ...);_aeff (_aeee ,_age );return _aeee ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_bdg *CleanFonts )Optimize (objects []_fg .PdfObject )(_fgbd []_fg .PdfObject ,_acc error ){var _ffe map[*_fg .PdfObjectStream ]struct{};if _bdg .Subset {var _cgd error ;_ffe ,_cgd =_aae (objects );if _cgd !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004fR\u003a\u0020\u0046\u0061\u0069\u006c\u0065\u0064\u0020\u0073u\u0062s\u0065\u0074\u0074\u0069\u006e\u0067\u003a \u0025\u0076",_cgd );
return nil ,_cgd ;};};for _ ,_deg :=range objects {_dda ,_bcgb :=_fg .GetStream (_deg );if !_bcgb {continue ;};if _ ,_afff :=_ffe [_dda ];_afff {continue ;};_bcbg ,_ccca :=_fg .NewEncoderFromStream (_dda );if _ccca !=nil {_d .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",_ccca );
continue ;};_ebf ,_ccca :=_bcbg .DecodeStream (_dda );if _ccca !=nil {_d .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",_ccca );
continue ;};if len (_ebf )< 4{continue ;};_gddg :=string (_ebf [:4]);if _gddg =="\u004f\u0054\u0054\u004f"{continue ;};if _gddg !="\u0000\u0001\u0000\u0000"&&_gddg !="\u0074\u0072\u0075\u0065"{continue ;};_eddc ,_ccca :=_aee .Parse (_fa .NewReader (_ebf ));
if _ccca !=nil {_d .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",_ccca );continue ;};_ccca =_eddc .Optimize ();
if _ccca !=nil {_d .Log .Debug ("\u0045\u0052RO\u0052\u0020\u004fp\u0074\u0069\u006d\u0069zin\u0067 f\u006f\u006e\u0074\u003a\u0020\u0025\u0076 -\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067",_ccca );continue ;};var _bcc _fa .Buffer ;_ccca =_eddc .Write (&_bcc );
if _ccca !=nil {_d .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",_ccca );continue ;};if _bcc .Len ()> len (_ebf ){_d .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 ;};_dgda ,_ccca :=_fg .MakeStream (_bcc .Bytes (),_fg .NewFlateEncoder ());if _ccca !=nil {continue ;};*_dda =*_dgda ;_dda .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_fg .MakeInteger (int64 (_bcc .Len ())));};return objects ,nil ;};func _fdgf (_egc *_gg .Image ,_bgf float64 )(*_gg .Image ,error ){_ddb ,_aeea :=_egc .ToGoImage ();
if _aeea !=nil {return nil ,_aeea ;};var _fbd _de .Image ;_fdad ,_acg :=_ddb .(*_de .Monochrome );if _acg {if _aeea =_fdad .ResolveDecode ();_aeea !=nil {return nil ,_aeea ;};_fbd ,_aeea =_fdad .Scale (_bgf );if _aeea !=nil {return nil ,_aeea ;};}else {_gddf :=int (_dc .RoundToEven (float64 (_egc .Width )*_bgf ));
_gcec :=int (_dc .RoundToEven (float64 (_egc .Height )*_bgf ));_fbd ,_aeea =_de .NewImage (_gddf ,_gcec ,int (_egc .BitsPerComponent ),_egc .ColorComponents ,nil ,nil ,nil );if _aeea !=nil {return nil ,_aeea ;};_a .CatmullRom .Scale (_fbd ,_fbd .Bounds (),_ddb ,_ddb .Bounds (),_a .Over ,&_a .Options {});
};_begaf :=_fbd .Base ();_bcde :=&_gg .Image {Width :int64 (_begaf .Width ),Height :int64 (_begaf .Height ),BitsPerComponent :int64 (_begaf .BitsPerComponent ),ColorComponents :_begaf .ColorComponents ,Data :_begaf .Data };_bcde .SetDecode (_begaf .Decode );
_bcde .SetAlpha (_begaf .Alpha );return _bcde ,nil ;};type content struct{_cee string ;_afe *_gg .PdfPageResources ;};func _gcfc (_gfaa *_gg .XObjectImage ,_dadg imageModifications )error {_fdba ,_gdcb :=_gfaa .ToImage ();if _gdcb !=nil {return _gdcb ;
};if _dadg .Scale !=0{_fdba ,_gdcb =_fdgf (_fdba ,_dadg .Scale );if _gdcb !=nil {return _gdcb ;};};if _dadg .Encoding !=nil {_gfaa .Filter =_dadg .Encoding ;};_gfaa .Decode =nil ;switch _aaad :=_gfaa .Filter .(type ){case *_fg .FlateEncoder :if _aaad .Predictor !=1&&_aaad .Predictor !=11{_aaad .Predictor =1;
};};if _gdcb =_gfaa .SetImage (_fdba ,nil );_gdcb !=nil {_d .Log .Debug ("\u0045\u0072\u0072or\u0020\u0073\u0065\u0074\u0074\u0069\u006e\u0067\u0020\u0069\u006d\u0061\u0067\u0065\u003a\u0020\u0025\u0076",_gdcb );return _gdcb ;};_gfaa .ToPdfObject ();return nil ;
};

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

// Optimize optimizes PDF objects to decrease PDF size.
func (_cfbb *Image )Optimize (objects []_fg .PdfObject )(_gdc []_fg .PdfObject ,_edce error ){if _cfbb .ImageQuality <=0{return objects ,nil ;};_edcf :=_dcde (objects );if len (_edcf )==0{return objects ,nil ;};_edad :=make (map[_fg .PdfObject ]_fg .PdfObject );
_cbbf :=make (map[_fg .PdfObject ]struct{});for _ ,_eec :=range _edcf {_efa :=_eec .Stream .Get ("\u0053\u004d\u0061s\u006b");_cbbf [_efa ]=struct{}{};};for _ade ,_efd :=range _edcf {_edgf :=_efd .Stream ;if _ ,_bcce :=_cbbf [_edgf ];_bcce {continue ;};
_efdd ,_ded :=_gg .NewXObjectImageFromStream (_edgf );if _ded !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_ded );continue ;};switch _efdd .Filter .(type ){case *_fg .JBIG2Encoder :continue ;case *_fg .CCITTFaxEncoder :continue ;
};_fbg ,_ded :=_efdd .ToImage ();if _ded !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_ded );continue ;};_fdb :=_fg .NewDCTEncoder ();_fdb .ColorComponents =_fbg .ColorComponents ;_fdb .Quality =_cfbb .ImageQuality ;
_fdb .BitsPerComponent =_efd .BitsPerComponent ;_fdb .Width =_efd .Width ;_fdb .Height =_efd .Height ;_bba ,_ded :=_fdb .EncodeBytes (_fbg .Data );if _ded !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_ded );continue ;
};var _caag _fg .StreamEncoder ;_caag =_fdb ;{_aaf :=_fg .NewFlateEncoder ();_eggg :=_fg .NewMultiEncoder ();_eggg .AddEncoder (_aaf );_eggg .AddEncoder (_fdb );_bdb ,_aceb :=_eggg .EncodeBytes (_fbg .Data );if _aceb !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_aceb );
continue ;};if len (_bdb )< len (_bba ){_d .Log .Trace ("\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 (_bba ),len (_bdb ),len (_edgf .Stream ));
_bba =_bdb ;_caag =_eggg ;};};_aebe :=len (_edgf .Stream );if _aebe < len (_bba ){continue ;};_bacg :=&_fg .PdfObjectStream {Stream :_bba };_bacg .PdfObjectReference =_edgf .PdfObjectReference ;_bacg .PdfObjectDictionary =_fg .MakeDict ();_bacg .Merge (_edgf .PdfObjectDictionary );
_bacg .Merge (_caag .MakeStreamDict ());_bacg .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_fg .MakeInteger (int64 (len (_bba ))));_edad [_edgf ]=_bacg ;_edcf [_ade ].Stream =_bacg ;};_gdc =make ([]_fg .PdfObject ,len (objects ));copy (_gdc ,objects );
_aeff (_gdc ,_edad );return _gdc ,nil ;};func _aeff (_bec []_fg .PdfObject ,_gfg map[_fg .PdfObject ]_fg .PdfObject ){if len (_gfg )==0{return ;};for _bgga ,_ced :=range _bec {if _dffa ,_beca :=_gfg [_ced ];_beca {_bec [_bgga ]=_dffa ;continue ;};_gfg [_ced ]=_ced ;
switch _fgga :=_ced .(type ){case *_fg .PdfObjectArray :_ebde :=make ([]_fg .PdfObject ,_fgga .Len ());copy (_ebde ,_fgga .Elements ());_aeff (_ebde ,_gfg );for _bbb ,_ddeg :=range _ebde {_fgga .Set (_bbb ,_ddeg );};case *_fg .PdfObjectStreams :_aeff (_fgga .Elements (),_gfg );
case *_fg .PdfObjectStream :_geb :=[]_fg .PdfObject {_fgga .PdfObjectDictionary };_aeff (_geb ,_gfg );_fgga .PdfObjectDictionary =_geb [0].(*_fg .PdfObjectDictionary );case *_fg .PdfObjectDictionary :_edgg :=_fgga .Keys ();_dagd :=make ([]_fg .PdfObject ,len (_edgg ));
for _faf ,_febd :=range _edgg {_dagd [_faf ]=_fgga .Get (_febd );};_aeff (_dagd ,_gfg );for _ecfb ,_ecd :=range _edgg {_fgga .Set (_ecd ,_dagd [_ecfb ]);};case *_fg .PdfIndirectObject :_adad :=[]_fg .PdfObject {_fgga .PdfObject };_aeff (_adad ,_gfg );_fgga .PdfObject =_adad [0];
};};};

// Optimize optimizes PDF objects to decrease PDF size.
func (_gbg *CombineIdenticalIndirectObjects )Optimize (objects []_fg .PdfObject )(_ada []_fg .PdfObject ,_fdg error ){_affg (objects );_ggb :=make (map[_fg .PdfObject ]_fg .PdfObject );_abg :=make (map[_fg .PdfObject ]struct{});_fgfg :=make (map[string ][]*_fg .PdfIndirectObject );
for _ ,_bce :=range objects {_dbc ,_dac :=_bce .(*_fg .PdfIndirectObject );if !_dac {continue ;};if _bfd ,_ggbf :=_dbc .PdfObject .(*_fg .PdfObjectDictionary );_ggbf {if _efc ,_ddd :=_bfd .Get ("\u0054\u0079\u0070\u0065").(*_fg .PdfObjectName );_ddd &&*_efc =="\u0050\u0061\u0067\u0065"{continue ;
};_gcf :=_ae .New ();_gcf .Write ([]byte (_bfd .WriteString ()));_ecag :=string (_gcf .Sum (nil ));_fgfg [_ecag ]=append (_fgfg [_ecag ],_dbc );};};for _ ,_adg :=range _fgfg {if len (_adg )< 2{continue ;};_gfb :=_adg [0];for _ggba :=1;_ggba < len (_adg );
_ggba ++{_gdb :=_adg [_ggba ];_ggb [_gdb ]=_gfb ;_abg [_gdb ]=struct{}{};};};_ada =make ([]_fg .PdfObject ,0,len (objects )-len (_abg ));for _ ,_gde :=range objects {if _ ,_ga :=_abg [_gde ];_ga {continue ;};_ada =append (_ada ,_gde );};_aeff (_ada ,_ggb );
return _ada ,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 ;};

// CombineIdenticalIndirectObjects combines identical indirect objects.
// It implements interface model.Optimizer.
type CombineIdenticalIndirectObjects struct{};

// Chain allows to use sequence of optimizers.
// It implements interface model.Optimizer.
type Chain struct{_gf []_gg .Optimizer };func _fga (_gb *_f .ContentStreamOperations )*_f .ContentStreamOperations {if _gb ==nil {return nil ;};_ag :=_f .ContentStreamOperations {};for _ ,_ec :=range *_gb {switch _ec .Operand {case "\u0042\u0044\u0043","\u0042\u004d\u0043","\u0045\u004d\u0043":continue ;
case "\u0054\u006d":if len (_ec .Params )==6{if _bc ,_fee :=_fg .GetNumbersAsFloat (_ec .Params );_fee ==nil {if _bc [0]==1&&_bc [1]==0&&_bc [2]==0&&_bc [3]==1{_ec =&_f .ContentStreamOperation {Params :[]_fg .PdfObject {_ec .Params [4],_ec .Params [5]},Operand :"\u0054\u0064"};
};};};};_ag =append (_ag ,_ec );};return &_ag ;};type objectStructure struct{_afcc *_fg .PdfObjectDictionary ;_befe *_fg .PdfObjectDictionary ;_efcb []*_fg .PdfIndirectObject ;};type imageInfo struct{BitsPerComponent int ;ColorComponents int ;Width int ;
Height int ;Stream *_fg .PdfObjectStream ;PPI float64 ;};func _dcde (_dbd []_fg .PdfObject )[]*imageInfo {_gfeg :=_fg .PdfObjectName ("\u0053u\u0062\u0074\u0079\u0070\u0065");_decf :=make (map[*_fg .PdfObjectStream ]struct{});var _dgf []*imageInfo ;for _ ,_eaf :=range _dbd {_bcdd ,_bcgc :=_fg .GetStream (_eaf );
if !_bcgc {continue ;};if _ ,_ecea :=_decf [_bcdd ];_ecea {continue ;};_decf [_bcdd ]=struct{}{};_fdcf :=_bcdd .PdfObjectDictionary .Get (_gfeg );_bbd ,_bcgc :=_fg .GetName (_fdcf );if !_bcgc ||string (*_bbd )!="\u0049\u006d\u0061g\u0065"{continue ;};_dag :=&imageInfo {Stream :_bcdd ,BitsPerComponent :8};
if _gcc ,_dffb :=_fg .GetIntVal (_bcdd .Get ("\u0042\u0069t\u0073\u0050\u0065r\u0043\u006f\u006d\u0070\u006f\u006e\u0065\u006e\u0074"));_dffb {_dag .BitsPerComponent =_gcc ;};if _ebbe ,_afc :=_fg .GetIntVal (_bcdd .Get ("\u0057\u0069\u0064t\u0068"));_afc {_dag .Width =_ebbe ;
};if _ede ,_fcff :=_fg .GetIntVal (_bcdd .Get ("\u0048\u0065\u0069\u0067\u0068\u0074"));_fcff {_dag .Height =_ede ;};_ccf ,_bea :=_gg .NewPdfColorspaceFromPdfObject (_bcdd .Get ("\u0043\u006f\u006c\u006f\u0072\u0053\u0070\u0061\u0063\u0065"));if _bea !=nil {_d .Log .Debug ("\u0045R\u0052\u004f\u0052\u003a\u0020\u0025v",_bea );
continue ;};if _ccf ==nil {_bdga ,_ccaf :=_fg .GetName (_bcdd .Get ("\u0046\u0069\u006c\u0074\u0065\u0072"));if _ccaf {switch _bdga .String (){case "\u0043\u0043\u0049\u0054\u0054\u0046\u0061\u0078\u0044e\u0063\u006f\u0064\u0065","J\u0042\u0049\u0047\u0032\u0044\u0065\u0063\u006f\u0064\u0065":_ccf =_gg .NewPdfColorspaceDeviceGray ();
_dag .BitsPerComponent =1;};};};switch _eda :=_ccf .(type ){case *_gg .PdfColorspaceDeviceRGB :_dag .ColorComponents =3;case *_gg .PdfColorspaceDeviceGray :_dag .ColorComponents =1;default:_d .Log .Debug ("\u004f\u0070\u0074\u0069\u006d\u0069\u007aa\u0074\u0069\u006fn\u0020\u0069\u0073 \u006e\u006ft\u0020\u0073\u0075\u0070\u0070\u006fr\u0074ed\u0020\u0066\u006f\u0072\u0020\u0063\u006f\u006c\u006f\u0072\u0020\u0073\u0070\u0061\u0063\u0065\u0020\u0025\u0054\u0020\u002d\u0020\u0073\u006b\u0069\u0070",_eda );
continue ;};_dgf =append (_dgf ,_dag );};return _dgf ;};func _eag (_dbe _fg .PdfObject )[]content {if _dbe ==nil {return nil ;};_gffd ,_abbc :=_fg .GetArray (_dbe );if !_abbc {_d .Log .Debug ("\u0041\u006e\u006e\u006fts\u0020\u006e\u006f\u0074\u0020\u0061\u006e\u0020\u0061\u0072\u0072\u0061\u0079");
return nil ;};var _dgde []content ;for _ ,_cca :=range _gffd .Elements (){_fcc ,_fda :=_fg .GetDict (_cca );if !_fda {_d .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 ;};_agaca ,_fda :=_fg .GetDict (_fcc .Get ("\u0041\u0050"));if !_fda {_d .Log .Debug ("\u004e\u006f\u0020\u0041P \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_edf :=_fg .TraceToDirectObject (_agaca .Get ("\u004e"));
if _edf ==nil {_d .Log .Debug ("N\u006f\u0020\u004e\u0020en\u0074r\u0079\u0020\u002d\u0020\u0073k\u0069\u0070\u0070\u0069\u006e\u0067");continue ;};var _dgec *_fg .PdfObjectStream ;switch _ccad :=_edf .(type ){case *_fg .PdfObjectDictionary :_ddf ,_dff :=_fg .GetName (_fcc .Get ("\u0041\u0053"));
if !_dff {_d .Log .Debug ("\u004e\u006f\u0020\u0041S \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_dgec ,_dff =_fg .GetStream (_ccad .Get (*_ddf ));if !_dff {_d .Log .Debug ("\u0046o\u0072\u006d\u0020\u006eo\u0074\u0020\u0066\u006f\u0075n\u0064 \u002d \u0073\u006b\u0069\u0070\u0070\u0069\u006eg");
continue ;};case *_fg .PdfObjectStream :_dgec =_ccad ;};if _dgec ==nil {_d .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 ;};_affb ,_gfde :=_gg .NewXObjectFormFromStream (_dgec );if _gfde !=nil {_d .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",_gfde );
continue ;};_egg ,_gfde :=_affb .GetContentStream ();if _gfde !=nil {_d .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",_gfde );continue ;};_dgde =append (_dgde ,content {_cee :string (_egg ),_afe :_affb .Resources });
};return _dgde ;};func _bcf (_eb *_fg .PdfObjectStream )error {_beg ,_fab :=_fg .DecodeStream (_eb );if _fab !=nil {return _fab ;};_cd :=_f .NewContentStreamParser (string (_beg ));_agd ,_fab :=_cd .Parse ();if _fab !=nil {return _fab ;};_agd =_fga (_agd );
_bd :=_agd .Bytes ();if len (_bd )>=len (_beg ){return nil ;};_bde ,_fab :=_fg .MakeStream (_agd .Bytes (),_fg .NewFlateEncoder ());if _fab !=nil {return _fab ;};_eb .Stream =_bde .Stream ;_eb .Merge (_bde .PdfObjectDictionary );return nil ;};func _dd (_daf *_fg .PdfObjectStream ,_cfad []rune ,_ebb []_aee .GlyphIndex )error {_daf ,_eae :=_fg .GetStream (_daf );
if !_eae {_d .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 _b .New ("\u0066\u006f\u006e\u0074fi\u006c\u0065\u0032\u0020\u006e\u006f\u0074\u0020\u0066\u006f\u0075\u006e\u0064");};_edcc ,_cbb :=_fg .DecodeStream (_daf );if _cbb !=nil {_d .Log .Debug ("\u0044\u0065c\u006f\u0064\u0065 \u0065\u0072\u0072\u006f\u0072\u003a\u0020\u0025\u0076",_cbb );
return _cbb ;};_dfg ,_cbb :=_aee .Parse (_fa .NewReader (_edcc ));if _cbb !=nil {_d .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 (_daf .Stream ));
return _cbb ;};_ddg :=_ebb ;if len (_cfad )> 0{_dcd :=_dfg .LookupRunes (_cfad );_ddg =append (_ddg ,_dcd ...);};_dfg ,_cbb =_dfg .SubsetKeepIndices (_ddg );if _cbb !=nil {_d .Log .Debug ("\u0045R\u0052\u004f\u0052\u0020s\u0075\u0062\u0073\u0065\u0074t\u0069n\u0067 \u0066\u006f\u006e\u0074\u003a\u0020\u0025v",_cbb );
return _cbb ;};var _cbd _fa .Buffer ;_cbb =_dfg .Write (&_cbd );if _cbb !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_cbb );return _cbb ;};if _cbd .Len ()> len (_edcc ){_d .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 ;};_aaeg ,_cbb :=_fg .MakeStream (_cbd .Bytes (),_fg .NewFlateEncoder ());if _cbb !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_cbb );return _cbb ;
};*_daf =*_aaeg ;_daf .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_fg .MakeInteger (int64 (_cbd .Len ())));return 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{};

// 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 (_gdag *ImagePPI )Optimize (objects []_fg .PdfObject )(_egb []_fg .PdfObject ,_fdbe error ){if _gdag .ImageUpperPPI <=0{return objects ,nil ;};_cccd :=_dcde (objects );if len (_cccd )==0{return objects ,nil ;};_bgg :=make (map[_fg .PdfObject ]struct{});
for _ ,_afde :=range _cccd {_ccee :=_afde .Stream .PdfObjectDictionary .Get ("\u0053\u004d\u0061s\u006b");_bgg [_ccee ]=struct{}{};};_dffg :=make (map[*_fg .PdfObjectStream ]*imageInfo );for _ ,_ecg :=range _cccd {_dffg [_ecg .Stream ]=_ecg ;};var _ecgd *_fg .PdfObjectDictionary ;
for _ ,_bfcc :=range objects {if _adf ,_ebg :=_fg .GetDict (_bfcc );_ecgd ==nil &&_ebg {if _cgdd ,_agcd :=_fg .GetName (_adf .Get ("\u0054\u0079\u0070\u0065"));_agcd &&*_cgdd =="\u0043a\u0074\u0061\u006c\u006f\u0067"{_ecgd =_adf ;};};};if _ecgd ==nil {return objects ,nil ;
};_fddb ,_fgbc :=_fg .GetDict (_ecgd .Get ("\u0050\u0061\u0067e\u0073"));if !_fgbc {return objects ,nil ;};_fegg ,_cadg :=_fg .GetArray (_fddb .Get ("\u004b\u0069\u0064\u0073"));if !_cadg {return objects ,nil ;};for _ ,_bccd :=range _fegg .Elements (){_ccb :=make (map[string ]*imageInfo );
_afg ,_cgecc :=_fg .GetDict (_bccd );if !_cgecc {continue ;};_adab ,_ :=_edcg (_afg .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));if len (_adab )==0{continue ;};_dee ,_decb :=_fg .GetDict (_afg .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));
if !_decb {continue ;};_edaf ,_gag :=_gg .NewPdfPageResourcesFromDict (_dee );if _gag !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u0020\u0070\u0061\u0072\u0073\u0069\u006e\u0067\u0020\u0072\u0065\u0073\u006f\u0075\u0072\u0063\u0065\u0073\u0020-\u0020\u0069\u0067\u006e\u006fr\u0069\u006eg\u003a\u0020\u0025\u0076",_gag );
continue ;};_cfae ,_dada :=_fg .GetDict (_dee .Get ("\u0058O\u0062\u006a\u0065\u0063\u0074"));if !_dada {continue ;};_fea :=_cfae .Keys ();for _ ,_gbe :=range _fea {if _cdg ,_bfg :=_fg .GetStream (_cfae .Get (_gbe ));_bfg {if _bggg ,_cdf :=_dffg [_cdg ];
_cdf {_ccb [string (_gbe )]=_bggg ;};};};_gdac :=_f .NewContentStreamParser (_adab );_adeg ,_gag :=_gdac .Parse ();if _gag !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_gag );continue ;};_bbag :=_f .NewContentStreamProcessor (*_adeg );
_bbag .AddHandler (_f .HandlerConditionEnumAllOperands ,"",func (_abf *_f .ContentStreamOperation ,_dfdfd _f .GraphicsState ,_dfc *_gg .PdfPageResources )error {switch _abf .Operand {case "\u0044\u006f":if len (_abf .Params )!=1{_d .Log .Debug ("E\u0052\u0052\u004f\u0052\u003a\u0020\u0049\u0067\u006e\u006f\u0072\u0069\u006e\u0067\u0020\u0044\u006f\u0020w\u0069\u0074\u0068\u0020\u006c\u0065\u006e\u0028\u0070\u0061ra\u006d\u0073\u0029 \u0021=\u0020\u0031");
return nil ;};_cba ,_acga :=_fg .GetName (_abf .Params [0]);if !_acga {_d .Log .Debug ("\u0045\u0052\u0052O\u0052\u003a\u0020\u0049\u0067\u006e\u006f\u0072\u0069\u006e\u0067\u0020\u0044\u006f\u0020\u0077\u0069\u0074\u0068\u0020\u006e\u006f\u006e\u0020\u004e\u0061\u006d\u0065\u0020p\u0061\u0072\u0061\u006d\u0065\u0074\u0065\u0072");
return nil ;};if _bbac ,_fgbe :=_ccb [string (*_cba )];_fgbe {_ffa :=_dfdfd .CTM .ScalingFactorX ();_aeg :=_dfdfd .CTM .ScalingFactorY ();_bfdb ,_eeg :=_ffa /72.0,_aeg /72.0;_bef ,_ecfe :=float64 (_bbac .Width )/_bfdb ,float64 (_bbac .Height )/_eeg ;if _bfdb ==0||_eeg ==0{_bef =72.0;
_ecfe =72.0;};_bbac .PPI =_dc .Max (_bbac .PPI ,_bef );_bbac .PPI =_dc .Max (_bbac .PPI ,_ecfe );};};return nil ;});_gag =_bbag .Process (_edaf );if _gag !=nil {_d .Log .Debug ("E\u0052\u0052\u004f\u0052 p\u0072o\u0063\u0065\u0073\u0073\u0069n\u0067\u003a\u0020\u0025\u002b\u0076",_gag );
continue ;};};for _ ,_dgg :=range _cccd {if _ ,_bca :=_bgg [_dgg .Stream ];_bca {continue ;};if _dgg .PPI <=_gdag .ImageUpperPPI {continue ;};_fbb ,_gadg :=_gg .NewXObjectImageFromStream (_dgg .Stream );if _gadg !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_gadg );
continue ;};var _dga imageModifications ;_dga .Scale =_gdag .ImageUpperPPI /_dgg .PPI ;if _dgg .BitsPerComponent ==1&&_dgg .ColorComponents ==1{_efe :=_dc .Round (_dgg .PPI /_gdag .ImageUpperPPI );_fgd :=_de .NextPowerOf2 (uint (_efe ));if _de .InDelta (float64 (_fgd ),1/_dga .Scale ,0.3){_dga .Scale =float64 (1)/float64 (_fgd );
};if _ ,_bacd :=_fbb .Filter .(*_fg .JBIG2Encoder );!_bacd {_dga .Encoding =_fg .NewJBIG2Encoder ();};};if _gadg =_gcfc (_fbb ,_dga );_gadg !=nil {_d .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",_gadg );
continue ;};_dga .Encoding =nil ;if _aafd ,_gfcd :=_fg .GetStream (_dgg .Stream .PdfObjectDictionary .Get ("\u0053\u004d\u0061s\u006b"));_gfcd {_aebd ,_bae :=_gg .NewXObjectImageFromStream (_aafd );if _bae !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_bae );
continue ;};if _bae =_gcfc (_aebd ,_dga );_bae !=nil {_d .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_bae );continue ;};};};return objects ,nil ;};

// CombineDuplicateDirectObjects combines duplicated direct objects by its data hash.
// It implements interface model.Optimizer.
type CombineDuplicateDirectObjects struct{};func _edcg (_bff _fg .PdfObject )(_fff string ,_dae []_fg .PdfObject ){var _fdfa _fa .Buffer ;switch _abgg :=_bff .(type ){case *_fg .PdfIndirectObject :_dae =append (_dae ,_abgg );_bff =_abgg .PdfObject ;};switch _dcded :=_bff .(type ){case *_fg .PdfObjectStream :if _cff ,_acee :=_fg .DecodeStream (_dcded );
_acee ==nil {_fdfa .Write (_cff );_dae =append (_dae ,_dcded );};case *_fg .PdfObjectArray :for _ ,_fgaa :=range _dcded .Elements (){switch _egdg :=_fgaa .(type ){case *_fg .PdfObjectStream :if _cbga ,_bfe :=_fg .DecodeStream (_egdg );_bfe ==nil {_fdfa .Write (_cbga );
_dae =append (_dae ,_egdg );};};};};return _fdfa .String (),_dae ;};

// Append appends optimizers to the chain.
func (_dcb *Chain )Append (optimizers ..._gg .Optimizer ){_dcb ._gf =append (_dcb ._gf ,optimizers ...)};type imageModifications struct{Scale float64 ;Encoding _fg .StreamEncoder ;};

// 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 ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_bg *CombineDuplicateStreams )Optimize (objects []_fg .PdfObject )(_fgg []_fg .PdfObject ,_face error ){_fec :=make (map[_fg .PdfObject ]_fg .PdfObject );_cgec :=make (map[_fg .PdfObject ]struct{});_fdfg :=make (map[string ][]*_fg .PdfObjectStream );
for _ ,_bb :=range objects {if _bge ,_bac :=_bb .(*_fg .PdfObjectStream );_bac {_dbgf :=_ae .New ();_dbgf .Write (_bge .Stream );_dbgf .Write ([]byte (_bge .PdfObjectDictionary .WriteString ()));_add :=string (_dbgf .Sum (nil ));_fdfg [_add ]=append (_fdfg [_add ],_bge );
};};for _ ,_fggc :=range _fdfg {if len (_fggc )< 2{continue ;};_bcd :=_fggc [0];for _fedc :=1;_fedc < len (_fggc );_fedc ++{_acf :=_fggc [_fedc ];_fec [_acf ]=_bcd ;_cgec [_acf ]=struct{}{};};};_fgg =make ([]_fg .PdfObject ,0,len (objects )-len (_cgec ));
for _ ,_ecaa :=range objects {if _ ,_cbdb :=_cgec [_ecaa ];_cbdb {continue ;};_fgg =append (_fgg ,_ecaa );};_aeff (_fgg ,_fec );return _fgg ,nil ;};func _aae (_edc []_fg .PdfObject )(_da map[*_fg .PdfObjectStream ]struct{},_db error ){_da =map[*_fg .PdfObjectStream ]struct{}{};
_fdf :=map[*_gg .PdfFont ]struct{}{};_ac :=_abe (_edc );for _ ,_cc :=range _ac ._efcb {_ff ,_fgb :=_fg .GetDict (_cc .PdfObject );if !_fgb {continue ;};_feb ,_fgb :=_fg .GetDict (_ff .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));if !_fgb {continue ;
};_gfd ,_ :=_edcg (_ff .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_abb ,_fge :=_gg .NewPdfPageResourcesFromDict (_feb );if _fge !=nil {return nil ,_fge ;};_bega :=[]content {{_cee :_gfd ,_afe :_abb }};_ge :=_eag (_ff .Get ("\u0041\u006e\u006e\u006f\u0074\u0073"));
if _ge !=nil {_bega =append (_bega ,_ge ...);};for _ ,_ebd :=range _bega {_gd ,_aff :=_e .NewFromContents (_ebd ._cee ,_ebd ._afe );if _aff !=nil {return nil ,_aff ;};_bcb ,_ ,_ ,_aff :=_gd .ExtractPageText ();if _aff !=nil {return nil ,_aff ;};for _ ,_dbg :=range _bcb .Marks ().Elements (){if _dbg .Font ==nil {continue ;
};if _ ,_df :=_fdf [_dbg .Font ];!_df {_fdf [_dbg .Font ]=struct{}{};};};};};_aec :=map[*_fg .PdfObjectStream ][]*_gg .PdfFont {};for _ceg :=range _fdf {_dgd :=_ceg .FontDescriptor ();if _dgd ==nil ||_dgd .FontFile2 ==nil {continue ;};_bcg ,_eeag :=_fg .GetStream (_dgd .FontFile2 );
if !_eeag {continue ;};_aec [_bcg ]=append (_aec [_bcg ],_ceg );};for _eca :=range _aec {var _ea []rune ;var _cad []_aee .GlyphIndex ;for _ ,_bddf :=range _aec [_eca ]{switch _dfd :=_bddf .Encoder ().(type ){case *_c .IdentityEncoder :_aef :=_dfd .RegisteredRunes ();
_cdd :=make ([]_aee .GlyphIndex ,len (_aef ));for _gee ,_aab :=range _aef {_cdd [_gee ]=_aee .GlyphIndex (_aab );};_cad =append (_cad ,_cdd ...);case *_c .TrueTypeFontEncoder :_gdd :=_dfd .RegisteredRunes ();_ea =append (_ea ,_gdd ...);case _c .SimpleEncoder :_cge :=_dfd .Charcodes ();
for _ ,_bcfb :=range _cge {_ead ,_gda :=_dfd .CharcodeToRune (_bcfb );if !_gda {_d .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",_bcfb );
continue ;};_ea =append (_ea ,_ead );};};};_db =_dd (_eca ,_ea ,_cad );if _db !=nil {_d .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",_db );
return nil ,_db ;};_da [_eca ]=struct{}{};};return _da ,nil ;};func _abe (_adb []_fg .PdfObject )objectStructure {_fgge :=objectStructure {};_fae :=false ;for _ ,_abd :=range _adb {switch _edaa :=_abd .(type ){case *_fg .PdfIndirectObject :_eage ,_aadg :=_fg .GetDict (_edaa );
if !_aadg {continue ;};_gfdf ,_aadg :=_fg .GetName (_eage .Get ("\u0054\u0079\u0070\u0065"));if !_aadg {continue ;};switch _gfdf .String (){case "\u0043a\u0074\u0061\u006c\u006f\u0067":_fgge ._afcc =_eage ;_fae =true ;};};if _fae {break ;};};if !_fae {return _fgge ;
};_adeb ,_bacdg :=_fg .GetDict (_fgge ._afcc .Get ("\u0050\u0061\u0067e\u0073"));if !_bacdg {return _fgge ;};_fgge ._befe =_adeb ;_bcdb ,_bacdg :=_fg .GetArray (_adeb .Get ("\u004b\u0069\u0064\u0073"));if !_bacdg {return _fgge ;};for _ ,_faceg :=range _bcdb .Elements (){_gca ,_adegc :=_fg .GetIndirect (_faceg );
if !_adegc {break ;};_fgge ._efcb =append (_fgge ._efcb ,_gca );};return _fgge ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_ee *CleanContentstream )Optimize (objects []_fg .PdfObject )(_agg []_fg .PdfObject ,_eg error ){_ecf :=map[*_fg .PdfObjectStream ]struct{}{};var _gfa []*_fg .PdfObjectStream ;_ed :=func (_fed *_fg .PdfObjectStream ){if _ ,_ef :=_ecf [_fed ];!_ef {_ecf [_fed ]=struct{}{};
_gfa =append (_gfa ,_fed );};};_ca :=map[_fg .PdfObject ]bool {};_af :=map[_fg .PdfObject ]bool {};for _ ,_cg :=range objects {switch _dge :=_cg .(type ){case *_fg .PdfIndirectObject :switch _gff :=_dge .PdfObject .(type ){case *_fg .PdfObjectDictionary :if _dgb ,_gce :=_fg .GetName (_gff .Get ("\u0054\u0079\u0070\u0065"));
!_gce ||_dgb .String ()!="\u0050\u0061\u0067\u0065"{continue ;};if _fd ,_fc :=_fg .GetStream (_gff .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_fc {_ed (_fd );}else if _edd ,_ggf :=_fg .GetArray (_gff .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));
_ggf {var _ce []*_fg .PdfObjectStream ;for _ ,_edg :=range _edd .Elements (){if _fgf ,_aa :=_fg .GetStream (_edg );_aa {_ce =append (_ce ,_fgf );};};if len (_ce )> 0{var _ecb _fa .Buffer ;for _ ,_ad :=range _ce {if _eea ,_cab :=_fg .DecodeStream (_ad );
_cab ==nil {_ecb .Write (_eea );};_ca [_ad ]=true ;};_aga ,_agac :=_fg .MakeStream (_ecb .Bytes (),_fg .NewFlateEncoder ());if _agac !=nil {return nil ,_agac ;};_af [_aga ]=true ;_gff .Set ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073",_aga );_ed (_aga );
};};};case *_fg .PdfObjectStream :if _gbb ,_egd :=_fg .GetName (_dge .Get ("\u0054\u0079\u0070\u0065"));!_egd ||_gbb .String ()!="\u0058O\u0062\u006a\u0065\u0063\u0074"{continue ;};if _cb ,_fcf :=_fg .GetName (_dge .Get ("\u0053u\u0062\u0074\u0079\u0070\u0065"));
!_fcf ||_cb .String ()!="\u0046\u006f\u0072\u006d"{continue ;};_ed (_dge );};};for _ ,_bdf :=range _gfa {_eg =_bcf (_bdf );if _eg !=nil {return nil ,_eg ;};};_agg =nil ;for _ ,_eee :=range objects {if _ca [_eee ]{continue ;};_agg =append (_agg ,_eee );
};for _afd :=range _af {_agg =append (_agg ,_afd );};return _agg ,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 ;
};

// 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 ;};