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.
//
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// terms that can be accessed at https://unidoc.io/eula/

package optimize ;import (_bg "bytes";_afb "crypto/md5";_c "errors";_f "github.com/unidoc/unipdf/v3/common";_bb "github.com/unidoc/unipdf/v3/contentstream";_cg "github.com/unidoc/unipdf/v3/core";_ab "github.com/unidoc/unipdf/v3/extractor";_aa "github.com/unidoc/unipdf/v3/internal/imageutil";
_ac "github.com/unidoc/unipdf/v3/internal/textencoding";_e "github.com/unidoc/unipdf/v3/model";_b "github.com/unidoc/unitype";_g "golang.org/x/image/draw";_af "math";);

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

// Optimize optimizes PDF objects to decrease PDF size.
func (_dee *ImagePPI )Optimize (objects []_cg .PdfObject )(_cdgc []_cg .PdfObject ,_adgcf error ){if _dee .ImageUpperPPI <=0{return objects ,nil ;};_efg :=_gbc (objects );if len (_efg )==0{return objects ,nil ;};_egga :=make (map[_cg .PdfObject ]struct{});
for _ ,_abc :=range _efg {_ebbg :=_abc .Stream .PdfObjectDictionary .Get ("\u0053\u004d\u0061s\u006b");_egga [_ebbg ]=struct{}{};};_cgb :=make (map[*_cg .PdfObjectStream ]*imageInfo );for _ ,_cad :=range _efg {_cgb [_cad .Stream ]=_cad ;};var _beafc *_cg .PdfObjectDictionary ;
for _ ,_ggd :=range objects {if _aef ,_aab :=_cg .GetDict (_ggd );_beafc ==nil &&_aab {if _bdbg ,_gdc :=_cg .GetName (_aef .Get ("\u0054\u0079\u0070\u0065"));_gdc &&*_bdbg =="\u0043a\u0074\u0061\u006c\u006f\u0067"{_beafc =_aef ;};};};if _beafc ==nil {return objects ,nil ;
};_aaae ,_dbcd :=_cg .GetDict (_beafc .Get ("\u0050\u0061\u0067e\u0073"));if !_dbcd {return objects ,nil ;};_bcc ,_fddd :=_cg .GetArray (_aaae .Get ("\u004b\u0069\u0064\u0073"));if !_fddd {return objects ,nil ;};for _ ,_cde :=range _bcc .Elements (){_dbfg :=make (map[string ]*imageInfo );
_cfe ,_dgb :=_cg .GetDict (_cde );if !_dgb {continue ;};_aefb ,_ :=_eagd (_cfe .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));if len (_aefb )==0{continue ;};_ddc ,_ddgd :=_cg .GetDict (_cfe .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));
if !_ddgd {continue ;};_afe ,_dfc :=_e .NewPdfPageResourcesFromDict (_ddc );if _dfc !=nil {_f .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",_dfc );
continue ;};_ecc ,_egdd :=_cg .GetDict (_ddc .Get ("\u0058O\u0062\u006a\u0065\u0063\u0074"));if !_egdd {continue ;};_bbdg :=_ecc .Keys ();for _ ,_agcc :=range _bbdg {if _bafe ,_egdc :=_cg .GetStream (_ecc .Get (_agcc ));_egdc {if _gefc ,_acgc :=_cgb [_bafe ];
_acgc {_dbfg [string (_agcc )]=_gefc ;};};};_abac :=_bb .NewContentStreamParser (_aefb );_dfca ,_dfc :=_abac .Parse ();if _dfc !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_dfc );continue ;};_gffg :=_bb .NewContentStreamProcessor (*_dfca );
_gffg .AddHandler (_bb .HandlerConditionEnumAllOperands ,"",func (_agfb *_bb .ContentStreamOperation ,_bbde _bb .GraphicsState ,_cgd *_e .PdfPageResources )error {switch _agfb .Operand {case "\u0044\u006f":if len (_agfb .Params )!=1{_f .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 ;};_bgde ,_agca :=_cg .GetName (_agfb .Params [0]);if !_agca {_f .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 _cbfb ,_gdg :=_dbfg [string (*_bgde )];_gdg {_cadg :=_bbde .CTM .ScalingFactorX ();_gage :=_bbde .CTM .ScalingFactorY ();_geed ,_dde :=_cadg /72.0,_gage /72.0;_abg ,_bdaf :=float64 (_cbfb .Width )/_geed ,float64 (_cbfb .Height )/_dde ;
if _geed ==0||_dde ==0{_abg =72.0;_bdaf =72.0;};_cbfb .PPI =_af .Max (_cbfb .PPI ,_abg );_cbfb .PPI =_af .Max (_cbfb .PPI ,_bdaf );};};return nil ;});_dfc =_gffg .Process (_afe );if _dfc !=nil {_f .Log .Debug ("E\u0052\u0052\u004f\u0052 p\u0072o\u0063\u0065\u0073\u0073\u0069n\u0067\u003a\u0020\u0025\u002b\u0076",_dfc );
continue ;};};for _ ,_edca :=range _efg {if _ ,_deee :=_egga [_edca .Stream ];_deee {continue ;};if _edca .PPI <=_dee .ImageUpperPPI {continue ;};_bac ,_bccb :=_e .NewXObjectImageFromStream (_edca .Stream );if _bccb !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_bccb );
continue ;};var _fbe imageModifications ;_fbe .Scale =_dee .ImageUpperPPI /_edca .PPI ;if _edca .BitsPerComponent ==1&&_edca .ColorComponents ==1{_gfab :=_af .Round (_edca .PPI /_dee .ImageUpperPPI );_abea :=_aa .NextPowerOf2 (uint (_gfab ));if _aa .InDelta (float64 (_abea ),1/_fbe .Scale ,0.3){_fbe .Scale =float64 (1)/float64 (_abea );
};if _ ,_bcg :=_bac .Filter .(*_cg .JBIG2Encoder );!_bcg {_fbe .Encoding =_cg .NewJBIG2Encoder ();};};if _bccb =_ecgf (_bac ,_fbe );_bccb !=nil {_f .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",_bccb );
continue ;};_fbe .Encoding =nil ;if _gbf ,_egeba :=_cg .GetStream (_edca .Stream .PdfObjectDictionary .Get ("\u0053\u004d\u0061s\u006b"));_egeba {_baee ,_cdae :=_e .NewXObjectImageFromStream (_gbf );if _cdae !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_cdae );
continue ;};if _cdae =_ecgf (_baee ,_fbe );_cdae !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_cdae );continue ;};};};return objects ,nil ;};type imageInfo struct{BitsPerComponent int ;ColorComponents int ;Width int ;
Height int ;Stream *_cg .PdfObjectStream ;PPI float64 ;};func _ecgf (_bca *_e .XObjectImage ,_eaee imageModifications )error {_bbga ,_efa :=_bca .ToImage ();if _efa !=nil {return _efa ;};if _eaee .Scale !=0{_bbga ,_efa =_ccc (_bbga ,_eaee .Scale );if _efa !=nil {return _efa ;
};};if _eaee .Encoding !=nil {_bca .Filter =_eaee .Encoding ;};_bca .Decode =nil ;switch _aebg :=_bca .Filter .(type ){case *_cg .FlateEncoder :if _aebg .Predictor !=1&&_aebg .Predictor !=11{_aebg .Predictor =1;};};if _efa =_bca .SetImage (_bbga ,nil );
_efa !=nil {_f .Log .Debug ("\u0045\u0072\u0072or\u0020\u0073\u0065\u0074\u0074\u0069\u006e\u0067\u0020\u0069\u006d\u0061\u0067\u0065\u003a\u0020\u0025\u0076",_efa );return _efa ;};_bca .ToPdfObject ();return nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_agf *CombineIdenticalIndirectObjects )Optimize (objects []_cg .PdfObject )(_agba []_cg .PdfObject ,_abae error ){_dda (objects );_cdg :=make (map[_cg .PdfObject ]_cg .PdfObject );_fdc :=make (map[_cg .PdfObject ]struct{});_gbg :=make (map[string ][]*_cg .PdfIndirectObject );
for _ ,_fbc :=range objects {_dfa ,_gbag :=_fbc .(*_cg .PdfIndirectObject );if !_gbag {continue ;};if _gfbe ,_bfce :=_dfa .PdfObject .(*_cg .PdfObjectDictionary );_bfce {if _cca ,_cac :=_gfbe .Get ("\u0054\u0079\u0070\u0065").(*_cg .PdfObjectName );_cac &&*_cca =="\u0050\u0061\u0067\u0065"{continue ;
};_ggg :=_afb .New ();_ggg .Write ([]byte (_gfbe .WriteString ()));_agfg :=string (_ggg .Sum (nil ));_gbg [_agfg ]=append (_gbg [_agfg ],_dfa );};};for _ ,_agc :=range _gbg {if len (_agc )< 2{continue ;};_bge :=_agc [0];for _beaf :=1;_beaf < len (_agc );
_beaf ++{_fbcc :=_agc [_beaf ];_cdg [_fbcc ]=_bge ;_fdc [_fbcc ]=struct{}{};};};_agba =make ([]_cg .PdfObject ,0,len (objects )-len (_fdc ));for _ ,_dgd :=range objects {if _ ,_feef :=_fdc [_dgd ];_feef {continue ;};_agba =append (_agba ,_dgd );};_gac (_agba ,_cdg );
return _agba ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_fgaa *ObjectStreams )Optimize (objects []_cg .PdfObject )(_acdd []_cg .PdfObject ,_bbdc error ){_fbed :=&_cg .PdfObjectStreams {};_gcag :=make ([]_cg .PdfObject ,0,len (objects ));for _ ,_fce :=range objects {if _dgff ,_bcag :=_fce .(*_cg .PdfIndirectObject );
_bcag &&_dgff .GenerationNumber ==0{_fbed .Append (_fce );}else {_gcag =append (_gcag ,_fce );};};if _fbed .Len ()==0{return _gcag ,nil ;};_acdd =make ([]_cg .PdfObject ,0,len (_gcag )+_fbed .Len ()+1);if _fbed .Len ()> 1{_acdd =append (_acdd ,_fbed );
};_acdd =append (_acdd ,_fbed .Elements ()...);_acdd =append (_acdd ,_gcag ...);return _acdd ,nil ;};

// 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 (_dd *CombineDuplicateStreams )Optimize (objects []_cg .PdfObject )(_dbg []_cg .PdfObject ,_egeb error ){_baa :=make (map[_cg .PdfObject ]_cg .PdfObject );_bdg :=make (map[_cg .PdfObject ]struct{});_feff :=make (map[string ][]*_cg .PdfObjectStream );
for _ ,_gff :=range objects {if _dfe ,_egb :=_gff .(*_cg .PdfObjectStream );_egb {_ccfa :=_afb .New ();_ccfa .Write (_dfe .Stream );_ccfa .Write ([]byte (_dfe .PdfObjectDictionary .WriteString ()));_dae :=string (_ccfa .Sum (nil ));_feff [_dae ]=append (_feff [_dae ],_dfe );
};};for _ ,_efc :=range _feff {if len (_efc )< 2{continue ;};_cbf :=_efc [0];for _fgf :=1;_fgf < len (_efc );_fgf ++{_afgb :=_efc [_fgf ];_baa [_afgb ]=_cbf ;_bdg [_afgb ]=struct{}{};};};_dbg =make ([]_cg .PdfObject ,0,len (objects )-len (_bdg ));for _ ,_bfe :=range objects {if _ ,_abee :=_bdg [_bfe ];
_abee {continue ;};_dbg =append (_dbg ,_bfe );};_gac (_dbg ,_baa );return _dbg ,nil ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_eda *CleanContentstream )Optimize (objects []_cg .PdfObject )(_cbb []_cg .PdfObject ,_fc error ){_bd :=map[*_cg .PdfObjectStream ]struct{}{};var _fbb []*_cg .PdfObjectStream ;_be :=func (_ca *_cg .PdfObjectStream ){if _ ,_ag :=_bd [_ca ];!_ag {_bd [_ca ]=struct{}{};
_fbb =append (_fbb ,_ca );};};_ff :=map[_cg .PdfObject ]bool {};_fa :=map[_cg .PdfObject ]bool {};for _ ,_bdd :=range objects {switch _ceb :=_bdd .(type ){case *_cg .PdfIndirectObject :switch _fg :=_ceb .PdfObject .(type ){case *_cg .PdfObjectDictionary :if _ffe ,_gg :=_cg .GetName (_fg .Get ("\u0054\u0079\u0070\u0065"));
!_gg ||_ffe .String ()!="\u0050\u0061\u0067\u0065"{continue ;};if _gcc ,_eee :=_cg .GetStream (_fg .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_eee {_be (_gcc );}else if _cbd ,_abef :=_cg .GetArray (_fg .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));
_abef {var _aad []*_cg .PdfObjectStream ;for _ ,_ecb :=range _cbd .Elements (){if _bgf ,_adg :=_cg .GetStream (_ecb );_adg {_aad =append (_aad ,_bgf );};};if len (_aad )> 0{var _gccg _bg .Buffer ;for _ ,_fbf :=range _aad {if _dc ,_fef :=_cg .DecodeStream (_fbf );
_fef ==nil {_gccg .Write (_dc );};_ff [_fbf ]=true ;};_edf ,_gfg :=_cg .MakeStream (_gccg .Bytes (),_cg .NewFlateEncoder ());if _gfg !=nil {return nil ,_gfg ;};_fa [_edf ]=true ;_fg .Set ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073",_edf );_be (_edf );
};};};case *_cg .PdfObjectStream :if _cfa ,_ccd :=_cg .GetName (_ceb .Get ("\u0054\u0079\u0070\u0065"));!_ccd ||_cfa .String ()!="\u0058O\u0062\u006a\u0065\u0063\u0074"{continue ;};if _bdc ,_fda :=_cg .GetName (_ceb .Get ("\u0053u\u0062\u0074\u0079\u0070\u0065"));
!_fda ||_bdc .String ()!="\u0046\u006f\u0072\u006d"{continue ;};_be (_ceb );};};for _ ,_gba :=range _fbb {_fc =_eg (_gba );if _fc !=nil {return nil ,_fc ;};};_cbb =nil ;for _ ,_cfc :=range objects {if _ff [_cfc ]{continue ;};_cbb =append (_cbb ,_cfc );
};for _aadc :=range _fa {_cbb =append (_cbb ,_aadc );};return _cbb ,nil ;};func _abe (_ea *_bb .ContentStreamOperations )*_bb .ContentStreamOperations {if _ea ==nil {return nil ;};_ba :=_bb .ContentStreamOperations {};for _ ,_cgc :=range *_ea {switch _cgc .Operand {case "\u0042\u0044\u0043","\u0042\u004d\u0043","\u0045\u004d\u0043":continue ;
case "\u0054\u006d":if len (_cgc .Params )==6{if _cb ,_cc :=_cg .GetNumbersAsFloat (_cgc .Params );_cc ==nil {if _cb [0]==1&&_cb [1]==0&&_cb [2]==0&&_cb [3]==1{_cgc =&_bb .ContentStreamOperation {Params :[]_cg .PdfObject {_cgc .Params [4],_cgc .Params [5]},Operand :"\u0054\u0064"};
};};};};_ba =append (_ba ,_cgc );};return &_ba ;};

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

// 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 ;
};

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

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

// Optimize optimizes PDF objects to decrease PDF size.
func (_ebc *CleanFonts )Optimize (objects []_cg .PdfObject )(_bbc []_cg .PdfObject ,_dec error ){var _deg map[*_cg .PdfObjectStream ]struct{};if _ebc .Subset {var _bgd error ;_deg ,_bgd =_de (objects );if _bgd !=nil {_f .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",_bgd );
return nil ,_bgd ;};};for _ ,_ccb :=range objects {_cda ,_bdb :=_cg .GetStream (_ccb );if !_bdb {continue ;};if _ ,_eafe :=_deg [_cda ];_eafe {continue ;};_adgc ,_ffcd :=_cg .NewEncoderFromStream (_cda );if _ffcd !=nil {_f .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",_ffcd );
continue ;};_gcfd ,_ffcd :=_adgc .DecodeStream (_cda );if _ffcd !=nil {_f .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",_ffcd );
continue ;};if len (_gcfd )< 4{continue ;};_ecd :=string (_gcfd [:4]);if _ecd =="\u004f\u0054\u0054\u004f"{continue ;};if _ecd !="\u0000\u0001\u0000\u0000"&&_ecd !="\u0074\u0072\u0075\u0065"{continue ;};_bda ,_ffcd :=_b .Parse (_bg .NewReader (_gcfd ));
if _ffcd !=nil {_f .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",_ffcd );continue ;};_ffcd =_bda .Optimize ();
if _ffcd !=nil {_f .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",_ffcd );continue ;};var _def _bg .Buffer ;_ffcd =_bda .Write (&_def );
if _ffcd !=nil {_f .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",_ffcd );continue ;};if _def .Len ()> len (_gcfd ){_f .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 ;};_dbd ,_ffcd :=_cg .MakeStream (_def .Bytes (),_cg .NewFlateEncoder ());if _ffcd !=nil {continue ;};*_cda =*_dbd ;_cda .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_cg .MakeInteger (int64 (_def .Len ())));};return objects ,nil ;};

// CombineDuplicateStreams combines duplicated streams by its data hash.
// It implements interface model.Optimizer.
type CombineDuplicateStreams struct{};type objectStructure struct{_ffd *_cg .PdfObjectDictionary ;_gddf *_cg .PdfObjectDictionary ;_gfd []*_cg .PdfIndirectObject ;};

// 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{};

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

// CombineDuplicateDirectObjects combines duplicated direct objects by its data hash.
// It implements interface model.Optimizer.
type CombineDuplicateDirectObjects struct{};

// 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 _ccc (_efef *_e .Image ,_adde float64 )(*_e .Image ,error ){_bfec ,_afda :=_efef .ToGoImage ();if _afda !=nil {return nil ,_afda ;};var _cfb _aa .Image ;_dgc ,_ggaf :=_bfec .(*_aa .Monochrome );if _ggaf {if _afda =_dgc .ResolveDecode ();
_afda !=nil {return nil ,_afda ;};_cfb ,_afda =_dgc .Scale (_adde );if _afda !=nil {return nil ,_afda ;};}else {_daf :=int (_af .RoundToEven (float64 (_efef .Width )*_adde ));_gbcf :=int (_af .RoundToEven (float64 (_efef .Height )*_adde ));_cfb ,_afda =_aa .NewImage (_daf ,_gbcf ,int (_efef .BitsPerComponent ),_efef .ColorComponents ,nil ,nil ,nil );
if _afda !=nil {return nil ,_afda ;};_g .CatmullRom .Scale (_cfb ,_cfb .Bounds (),_bfec ,_bfec .Bounds (),_g .Over ,&_g .Options {});};_ceec :=_cfb .Base ();_bfaa :=&_e .Image {Width :int64 (_ceec .Width ),Height :int64 (_ceec .Height ),BitsPerComponent :int64 (_ceec .BitsPerComponent ),ColorComponents :_ceec .ColorComponents ,Data :_ceec .Data };
_bfaa .SetDecode (_ceec .Decode );_bfaa .SetAlpha (_ceec .Alpha );return _bfaa ,nil ;};func _gac (_dfaf []_cg .PdfObject ,_dafc map[_cg .PdfObject ]_cg .PdfObject ){if len (_dafc )==0{return ;};for _fge ,_ffb :=range _dfaf {if _caaa ,_dbfe :=_dafc [_ffb ];
_dbfe {_dfaf [_fge ]=_caaa ;continue ;};_dafc [_ffb ]=_ffb ;switch _feefd :=_ffb .(type ){case *_cg .PdfObjectArray :_bcaa :=make ([]_cg .PdfObject ,_feefd .Len ());copy (_bcaa ,_feefd .Elements ());_gac (_bcaa ,_dafc );for _ega ,_aaaeg :=range _bcaa {_feefd .Set (_ega ,_aaaeg );
};case *_cg .PdfObjectStreams :_gac (_feefd .Elements (),_dafc );case *_cg .PdfObjectStream :_abeb :=[]_cg .PdfObject {_feefd .PdfObjectDictionary };_gac (_abeb ,_dafc );_feefd .PdfObjectDictionary =_abeb [0].(*_cg .PdfObjectDictionary );case *_cg .PdfObjectDictionary :_aadf :=_feefd .Keys ();
_gbfa :=make ([]_cg .PdfObject ,len (_aadf ));for _cdbd ,_bga :=range _aadf {_gbfa [_cdbd ]=_feefd .Get (_bga );};_gac (_gbfa ,_dafc );for _bccg ,_abf :=range _aadf {_feefd .Set (_abf ,_gbfa [_bccg ]);};case *_cg .PdfIndirectObject :_ggbe :=[]_cg .PdfObject {_feefd .PdfObject };
_gac (_ggbe ,_dafc );_feefd .PdfObject =_ggbe [0];};};};func _de (_aadcf []_cg .PdfObject )(_bad map[*_cg .PdfObjectStream ]struct{},_cbe error ){_bad =map[*_cg .PdfObjectStream ]struct{}{};_ecg :=map[*_e .PdfFont ]struct{}{};_afc :=_ebdc (_aadcf );for _ ,_fcg :=range _afc ._gfd {_cgca ,_db :=_cg .GetDict (_fcg .PdfObject );
if !_db {continue ;};_dg ,_db :=_cg .GetDict (_cgca .Get ("\u0052e\u0073\u006f\u0075\u0072\u0063\u0065s"));if !_db {continue ;};_afbc ,_ :=_eagd (_cgca .Get ("\u0043\u006f\u006e\u0074\u0065\u006e\u0074\u0073"));_eaf ,_cae :=_e .NewPdfPageResourcesFromDict (_dg );
if _cae !=nil {return nil ,_cae ;};_dge :=[]content {{_ded :_afbc ,_dce :_eaf }};_bea :=_aba (_cgca .Get ("\u0041\u006e\u006e\u006f\u0074\u0073"));if _bea !=nil {_dge =append (_dge ,_bea ...);};for _ ,_edc :=range _dge {_ccf ,_fdgb :=_ab .NewFromContents (_edc ._ded ,_edc ._dce );
if _fdgb !=nil {return nil ,_fdgb ;};_ffc ,_ ,_ ,_fdgb :=_ccf .ExtractPageText ();if _fdgb !=nil {return nil ,_fdgb ;};for _ ,_gcb :=range _ffc .Marks ().Elements (){if _gcb .Font ==nil {continue ;};if _ ,_fcf :=_ecg [_gcb .Font ];!_fcf {_ecg [_gcb .Font ]=struct{}{};
};};};};_gfc :=map[*_cg .PdfObjectStream ][]*_e .PdfFont {};for _gcg :=range _ecg {_gea :=_gcg .FontDescriptor ();if _gea ==nil ||_gea .FontFile2 ==nil {continue ;};_fca ,_faf :=_cg .GetStream (_gea .FontFile2 );if !_faf {continue ;};_gfc [_fca ]=append (_gfc [_fca ],_gcg );
};for _ae :=range _gfc {var _acc []rune ;var _fad []_b .GlyphIndex ;for _ ,_acd :=range _gfc [_ae ]{switch _egc :=_acd .Encoder ().(type ){case *_ac .IdentityEncoder :_dbc :=_egc .RegisteredRunes ();_edg :=make ([]_b .GlyphIndex ,len (_dbc ));for _ef ,_aac :=range _dbc {_edg [_ef ]=_b .GlyphIndex (_aac );
};_fad =append (_fad ,_edg ...);case *_ac .TrueTypeFontEncoder :_edfa :=_egc .RegisteredRunes ();_acc =append (_acc ,_edfa ...);case _ac .SimpleEncoder :_acg :=_egc .Charcodes ();for _ ,_gfa :=range _acg {_afg ,_aae :=_egc .CharcodeToRune (_gfa );if !_aae {_f .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",_gfa );
continue ;};_acc =append (_acc ,_afg );};};};_cbe =_fff (_ae ,_acc ,_fad );if _cbe !=nil {_f .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",_cbe );
return nil ,_cbe ;};_bad [_ae ]=struct{}{};};return _bad ,nil ;};func _dda (_bcgd []_cg .PdfObject ){for _aaec ,_ebbca :=range _bcgd {switch _gcgeg :=_ebbca .(type ){case *_cg .PdfIndirectObject :_gcgeg .ObjectNumber =int64 (_aaec +1);_gcgeg .GenerationNumber =0;
case *_cg .PdfObjectStream :_gcgeg .ObjectNumber =int64 (_aaec +1);_gcgeg .GenerationNumber =0;case *_cg .PdfObjectStreams :_gcgeg .ObjectNumber =int64 (_aaec +1);_gcgeg .GenerationNumber =0;};};};

// Optimize optimizes PDF objects to decrease PDF size.
func (_ebcf *CombineDuplicateDirectObjects )Optimize (objects []_cg .PdfObject )(_gga []_cg .PdfObject ,_gced error ){_dda (objects );_dgaa :=make (map[string ][]*_cg .PdfObjectDictionary );var _fdd func (_bfa *_cg .PdfObjectDictionary );_fdd =func (_fbg *_cg .PdfObjectDictionary ){for _ ,_baf :=range _fbg .Keys (){_adb :=_fbg .Get (_baf );
if _ebb ,_ede :=_adb .(*_cg .PdfObjectDictionary );_ede {_bce :=_afb .New ();_bce .Write ([]byte (_ebb .WriteString ()));_decf :=string (_bce .Sum (nil ));_dgaa [_decf ]=append (_dgaa [_decf ],_ebb );_fdd (_ebb );};};};for _ ,_acag :=range objects {_dgag ,_ga :=_acag .(*_cg .PdfIndirectObject );
if !_ga {continue ;};if _cab ,_ade :=_dgag .PdfObject .(*_cg .PdfObjectDictionary );_ade {_fdd (_cab );};};_fada :=make ([]_cg .PdfObject ,0,len (_dgaa ));_caef :=make (map[_cg .PdfObject ]_cg .PdfObject );for _ ,_abbf :=range _dgaa {if len (_abbf )< 2{continue ;
};_eca :=_cg .MakeDict ();_eca .Merge (_abbf [0]);_dba :=_cg .MakeIndirectObject (_eca );_fada =append (_fada ,_dba );for _ebd :=0;_ebd < len (_abbf );_ebd ++{_ebf :=_abbf [_ebd ];_caef [_ebf ]=_dba ;};};_gga =make ([]_cg .PdfObject ,len (objects ));copy (_gga ,objects );
_gga =append (_fada ,_gga ...);_gac (_gga ,_caef );return _gga ,nil ;};type content struct{_ded string ;_dce *_e .PdfPageResources ;};func _eagd (_beg _cg .PdfObject )(_dbfd string ,_ccdd []_cg .PdfObject ){var _abefd _bg .Buffer ;switch _cge :=_beg .(type ){case *_cg .PdfIndirectObject :_ccdd =append (_ccdd ,_cge );
_beg =_cge .PdfObject ;};switch _gcad :=_beg .(type ){case *_cg .PdfObjectStream :if _eaef ,_fbcce :=_cg .DecodeStream (_gcad );_fbcce ==nil {_abefd .Write (_eaef );_ccdd =append (_ccdd ,_gcad );};case *_cg .PdfObjectArray :for _ ,_dbbf :=range _gcad .Elements (){switch _ccce :=_dbbf .(type ){case *_cg .PdfObjectStream :if _ddec ,_cfbd :=_cg .DecodeStream (_ccce );
_cfbd ==nil {_abefd .Write (_ddec );_ccdd =append (_ccdd ,_ccce );};};};};return _abefd .String (),_ccdd ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_bgdb *CompressStreams )Optimize (objects []_cg .PdfObject )(_ggc []_cg .PdfObject ,_dag error ){_ggc =make ([]_cg .PdfObject ,len (objects ));copy (_ggc ,objects );for _ ,_cedb :=range objects {_dbdg ,_ggb :=_cg .GetStream (_cedb );if !_ggb {continue ;
};if _gfbd :=_dbdg .Get ("\u0046\u0069\u006c\u0074\u0065\u0072");_gfbd !=nil {if _ ,_dab :=_cg .GetName (_gfbd );_dab {continue ;};if _bgdf ,_caea :=_cg .GetArray (_gfbd );_caea &&_bgdf .Len ()> 0{continue ;};};_edfe :=_cg .NewFlateEncoder ();var _cce []byte ;
_cce ,_dag =_edfe .EncodeBytes (_dbdg .Stream );if _dag !=nil {return _ggc ,_dag ;};_gec :=_edfe .MakeStreamDict ();if len (_cce )+len (_gec .WriteString ())< len (_dbdg .Stream ){_dbdg .Stream =_cce ;_dbdg .PdfObjectDictionary .Merge (_gec );_dbdg .PdfObjectDictionary .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_cg .MakeInteger (int64 (len (_dbdg .Stream ))));
};};return _ggc ,nil ;};func _ebdc (_cadb []_cg .PdfObject )objectStructure {_eab :=objectStructure {};_ccfad :=false ;for _ ,_ccagb :=range _cadb {switch _bcac :=_ccagb .(type ){case *_cg .PdfIndirectObject :_gdf ,_aed :=_cg .GetDict (_bcac );if !_aed {continue ;
};_gfgf ,_aed :=_cg .GetName (_gdf .Get ("\u0054\u0079\u0070\u0065"));if !_aed {continue ;};switch _gfgf .String (){case "\u0043a\u0074\u0061\u006c\u006f\u0067":_eab ._ffd =_gdf ;_ccfad =true ;};};if _ccfad {break ;};};if !_ccfad {return _eab ;};_cegc ,_fbge :=_cg .GetDict (_eab ._ffd .Get ("\u0050\u0061\u0067e\u0073"));
if !_fbge {return _eab ;};_eab ._gddf =_cegc ;_gbgc ,_fbge :=_cg .GetArray (_cegc .Get ("\u004b\u0069\u0064\u0073"));if !_fbge {return _eab ;};for _ ,_gbcb :=range _gbgc .Elements (){_eeb ,_fcfg :=_cg .GetIndirect (_gbcb );if !_fcfg {break ;};_eab ._gfd =append (_eab ._gfd ,_eeb );
};return _eab ;};func _eg (_fb *_cg .PdfObjectStream )error {_cd ,_ed :=_cg .DecodeStream (_fb );if _ed !=nil {return _ed ;};_ad :=_bb .NewContentStreamParser (string (_cd ));_aaa ,_ed :=_ad .Parse ();if _ed !=nil {return _ed ;};_aaa =_abe (_aaa );_d :=_aaa .Bytes ();
if len (_d )>=len (_cd ){return nil ;};_fdg ,_ed :=_cg .MakeStream (_aaa .Bytes (),_cg .NewFlateEncoder ());if _ed !=nil {return _ed ;};_fb .Stream =_fdg .Stream ;_fb .Merge (_fdg .PdfObjectDictionary );return nil ;};func _fff (_fee *_cg .PdfObjectStream ,_aca []rune ,_fcff []_b .GlyphIndex )error {_fee ,_gce :=_cg .GetStream (_fee );
if !_gce {_f .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 _c .New ("\u0066\u006f\u006e\u0074fi\u006c\u0065\u0032\u0020\u006e\u006f\u0074\u0020\u0066\u006f\u0075\u006e\u0064");};_cgg ,_ccgd :=_cg .DecodeStream (_fee );if _ccgd !=nil {_f .Log .Debug ("\u0044\u0065c\u006f\u0064\u0065 \u0065\u0072\u0072\u006f\u0072\u003a\u0020\u0025\u0076",_ccgd );
return _ccgd ;};_bf ,_ccgd :=_b .Parse (_bg .NewReader (_cgg ));if _ccgd !=nil {_f .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 (_fee .Stream ));
return _ccgd ;};_dga :=_fcff ;if len (_aca )> 0{_cbde :=_bf .LookupRunes (_aca );_dga =append (_dga ,_cbde ...);};_bf ,_ccgd =_bf .SubsetKeepIndices (_dga );if _ccgd !=nil {_f .Log .Debug ("\u0045R\u0052\u004f\u0052\u0020s\u0075\u0062\u0073\u0065\u0074t\u0069n\u0067 \u0066\u006f\u006e\u0074\u003a\u0020\u0025v",_ccgd );
return _ccgd ;};var _gbe _bg .Buffer ;_ccgd =_bf .Write (&_gbe );if _ccgd !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_ccgd );return _ccgd ;};if _gbe .Len ()> len (_cgg ){_f .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 ;};_bfc ,_ccgd :=_cg .MakeStream (_gbe .Bytes (),_cg .NewFlateEncoder ());if _ccgd !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004fR \u0057\u0072\u0069\u0074\u0069\u006e\u0067\u0020\u0066\u006f\u006e\u0074\u003a\u0020%\u0076",_ccgd );return _ccgd ;
};*_fee =*_bfc ;_fee .Set ("\u004ce\u006e\u0067\u0074\u0068\u0031",_cg .MakeInteger (int64 (_gbe .Len ())));return 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 ;};

// Chain allows to use sequence of optimizers.
// It implements interface model.Optimizer.
type Chain struct{_gb []_e .Optimizer };func _gbc (_aaee []_cg .PdfObject )[]*imageInfo {_abbg :=_cg .PdfObjectName ("\u0053u\u0062\u0074\u0079\u0070\u0065");_fbbd :=make (map[*_cg .PdfObjectStream ]struct{});var _cbbg []*imageInfo ;for _ ,_ada :=range _aaee {_fba ,_gag :=_cg .GetStream (_ada );
if !_gag {continue ;};if _ ,_ebbc :=_fbbd [_fba ];_ebbc {continue ;};_fbbd [_fba ]=struct{}{};_fdcg :=_fba .PdfObjectDictionary .Get (_abbg );_ecab ,_gag :=_cg .GetName (_fdcg );if !_gag ||string (*_ecab )!="\u0049\u006d\u0061g\u0065"{continue ;};_fgff :=&imageInfo {Stream :_fba ,BitsPerComponent :8};
if _dfg ,_bgfb :=_cg .GetIntVal (_fba .Get ("\u0042\u0069t\u0073\u0050\u0065r\u0043\u006f\u006d\u0070\u006f\u006e\u0065\u006e\u0074"));_bgfb {_fgff .BitsPerComponent =_dfg ;};if _afd ,_adee :=_cg .GetIntVal (_fba .Get ("\u0057\u0069\u0064t\u0068"));_adee {_fgff .Width =_afd ;
};if _beag ,_dbfb :=_cg .GetIntVal (_fba .Get ("\u0048\u0065\u0069\u0067\u0068\u0074"));_dbfb {_fgff .Height =_beag ;};_agbd ,_fgab :=_e .NewPdfColorspaceFromPdfObject (_fba .Get ("\u0043\u006f\u006c\u006f\u0072\u0053\u0070\u0061\u0063\u0065"));if _fgab !=nil {_f .Log .Debug ("\u0045R\u0052\u004f\u0052\u003a\u0020\u0025v",_fgab );
continue ;};if _agbd ==nil {_geg ,_aafe :=_cg .GetName (_fba .Get ("\u0046\u0069\u006c\u0074\u0065\u0072"));if _aafe {switch _geg .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":_agbd =_e .NewPdfColorspaceDeviceGray ();
_fgff .BitsPerComponent =1;};};};switch _eeed :=_agbd .(type ){case *_e .PdfColorspaceDeviceRGB :_fgff .ColorComponents =3;case *_e .PdfColorspaceDeviceGray :_fgff .ColorComponents =1;default:_f .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",_eeed );
continue ;};_cbbg =append (_cbbg ,_fgff );};return _cbbg ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_gf *Chain )Optimize (objects []_cg .PdfObject )(_gc []_cg .PdfObject ,_gd error ){_gcf :=objects ;for _ ,_eef :=range _gf ._gb {_ce ,_fd :=_eef .Optimize (_gcf );if _fd !=nil {_f .Log .Debug ("\u0045\u0052\u0052OR\u0020\u004f\u0070\u0074\u0069\u006d\u0069\u007a\u0061\u0074\u0069\u006f\u006e\u003a\u0020\u0025\u002b\u0076",_fd );
continue ;};_gcf =_ce ;};return _gcf ,nil ;};type imageModifications struct{Scale float64 ;Encoding _cg .StreamEncoder ;};func _aba (_fcc _cg .PdfObject )[]content {if _fcc ==nil {return nil ;};_ace ,_ecdd :=_cg .GetArray (_fcc );if !_ecdd {_f .Log .Debug ("\u0041\u006e\u006e\u006fts\u0020\u006e\u006f\u0074\u0020\u0061\u006e\u0020\u0061\u0072\u0072\u0061\u0079");
return nil ;};var _ecde []content ;for _ ,_add :=range _ace .Elements (){_gfb ,_gcge :=_cg .GetDict (_add );if !_gcge {_f .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 ;};_bbb ,_gcge :=_cg .GetDict (_gfb .Get ("\u0041\u0050"));if !_gcge {_f .Log .Debug ("\u004e\u006f\u0020\u0041P \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_bfd :=_cg .TraceToDirectObject (_bbb .Get ("\u004e"));
if _bfd ==nil {_f .Log .Debug ("N\u006f\u0020\u004e\u0020en\u0074r\u0079\u0020\u002d\u0020\u0073k\u0069\u0070\u0070\u0069\u006e\u0067");continue ;};var _aeb *_cg .PdfObjectStream ;switch _efe :=_bfd .(type ){case *_cg .PdfObjectDictionary :_caa ,_fga :=_cg .GetName (_gfb .Get ("\u0041\u0053"));
if !_fga {_f .Log .Debug ("\u004e\u006f\u0020\u0041S \u0065\u006e\u0074\u0072\u0079\u0020\u002d\u0020\u0073\u006b\u0069\u0070\u0070\u0069n\u0067");continue ;};_aeb ,_fga =_cg .GetStream (_efe .Get (*_caa ));if !_fga {_f .Log .Debug ("\u0046o\u0072\u006d\u0020\u006eo\u0074\u0020\u0066\u006f\u0075n\u0064 \u002d \u0073\u006b\u0069\u0070\u0070\u0069\u006eg");
continue ;};case *_cg .PdfObjectStream :_aeb =_efe ;};if _aeb ==nil {_f .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 ;};_abb ,_eea :=_e .NewXObjectFormFromStream (_aeb );if _eea !=nil {_f .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",_eea );
continue ;};_df ,_eea :=_abb .GetContentStream ();if _eea !=nil {_f .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",_eea );continue ;};_ecde =append (_ecde ,content {_ded :string (_df ),_dce :_abb .Resources });
};return _ecde ;};

// Optimize optimizes PDF objects to decrease PDF size.
func (_ddg *Image )Optimize (objects []_cg .PdfObject )(_eeec []_cg .PdfObject ,_gfbg error ){if _ddg .ImageQuality <=0{return objects ,nil ;};_gca :=_gbc (objects );if len (_gca )==0{return objects ,nil ;};_bfef :=make (map[_cg .PdfObject ]_cg .PdfObject );
_eae :=make (map[_cg .PdfObject ]struct{});for _ ,_egd :=range _gca {_cdb :=_egd .Stream .Get ("\u0053\u004d\u0061s\u006b");_eae [_cdb ]=struct{}{};};for _eag ,_fcb :=range _gca {_fae :=_fcb .Stream ;if _ ,_cffa :=_eae [_fae ];_cffa {continue ;};_eged ,_egg :=_e .NewXObjectImageFromStream (_fae );
if _egg !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_egg );continue ;};switch _eged .Filter .(type ){case *_cg .JBIG2Encoder :continue ;case *_cg .CCITTFaxEncoder :continue ;};_dbb ,_egg :=_eged .ToImage ();if _egg !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_egg );
continue ;};_edgb :=_cg .NewDCTEncoder ();_edgb .ColorComponents =_dbb .ColorComponents ;_edgb .Quality =_ddg .ImageQuality ;_edgb .BitsPerComponent =_fcb .BitsPerComponent ;_edgb .Width =_fcb .Width ;_edgb .Height =_fcb .Height ;_dgf ,_egg :=_edgb .EncodeBytes (_dbb .Data );
if _egg !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_egg );continue ;};var _gef _cg .StreamEncoder ;_gef =_edgb ;{_gfff :=_cg .NewFlateEncoder ();_bbf :=_cg .NewMultiEncoder ();_bbf .AddEncoder (_gfff );_bbf .AddEncoder (_edgb );
_bdcf ,_gae :=_bbf .EncodeBytes (_dbb .Data );if _gae !=nil {_f .Log .Debug ("\u0045\u0052\u0052\u004f\u0052\u003a\u0020\u0025\u002b\u0076",_gae );continue ;};if len (_bdcf )< len (_dgf ){_f .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 (_dgf ),len (_bdcf ),len (_fae .Stream ));
_dgf =_bdcf ;_gef =_bbf ;};};_ccag :=len (_fae .Stream );if _ccag < len (_dgf ){continue ;};_acaa :=&_cg .PdfObjectStream {Stream :_dgf };_acaa .PdfObjectReference =_fae .PdfObjectReference ;_acaa .PdfObjectDictionary =_cg .MakeDict ();_acaa .Merge (_fae .PdfObjectDictionary );
_acaa .Merge (_gef .MakeStreamDict ());_acaa .Set ("\u004c\u0065\u006e\u0067\u0074\u0068",_cg .MakeInteger (int64 (len (_dgf ))));_bfef [_fae ]=_acaa ;_gca [_eag ].Stream =_acaa ;};_eeec =make ([]_cg .PdfObject ,len (objects ));copy (_eeec ,objects );_gac (_eeec ,_bfef );
return _eeec ,nil ;};