unipdf/internal/sampling/sampling.go

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// Copyright 2020 FoxyUtils ehf. All rights reserved.
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// DO NOT EDIT: generated by unitwist Go source code obfuscator.
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package sampling ;import (_b "github.com/unidoc/unipdf/v3/internal/bitwise";_d "github.com/unidoc/unipdf/v3/internal/imageutil";_ff "io";);type Writer struct{_af _d .ImageBase ;_dgca *_b .Writer ;_gff ,_aa int ;_cad bool ;};func NewReader (img _d .ImageBase )*Reader {return &Reader {_g :_b .NewReader (img .Data ),_fd :img ,_be :img .ColorComponents ,_dg :img .BytesPerLine *8!=img .ColorComponents *img .BitsPerComponent *img .Width };
};type Reader struct{_fd _d .ImageBase ;_g *_b .Reader ;_gb ,_a ,_be int ;_dg bool ;};func (_ef *Writer )WriteSample (sample uint32 )error {if _ ,_cadf :=_ef ._dgca .WriteBits (uint64 (sample ),_ef ._af .BitsPerComponent );_cadf !=nil {return _cadf ;};
_ef ._aa --;if _ef ._aa ==0{_ef ._aa =_ef ._af .ColorComponents ;_ef ._gff ++;};if _ef ._gff ==_ef ._af .Width {if _ef ._cad {_ef ._dgca .FinishByte ();};_ef ._gff =0;};return nil ;};func ResampleBytes (data []byte ,bitsPerSample int )[]uint32 {var _bc []uint32 ;
_dfe :=bitsPerSample ;var _ee uint32 ;var _fb byte ;_gd :=0;_dgb :=0;_dgg :=0;for _dgg < len (data ){if _gd > 0{_ge :=_gd ;if _dfe < _ge {_ge =_dfe ;};_ee =(_ee <<uint (_ge ))|uint32 (_fb >>uint (8-_ge ));_gd -=_ge ;if _gd > 0{_fb =_fb <<uint (_ge );}else {_fb =0;
};_dfe -=_ge ;if _dfe ==0{_bc =append (_bc ,_ee );_dfe =bitsPerSample ;_ee =0;_dgb ++;};}else {_ca :=data [_dgg ];_dgg ++;_ag :=8;if _dfe < _ag {_ag =_dfe ;};_gd =8-_ag ;_ee =(_ee <<uint (_ag ))|uint32 (_ca >>uint (_gd ));if _ag < 8{_fb =_ca <<uint (_ag );
};_dfe -=_ag ;if _dfe ==0{_bc =append (_bc ,_ee );_dfe =bitsPerSample ;_ee =0;_dgb ++;};};};for _gd >=bitsPerSample {_bd :=_gd ;if _dfe < _bd {_bd =_dfe ;};_ee =(_ee <<uint (_bd ))|uint32 (_fb >>uint (8-_bd ));_gd -=_bd ;if _gd > 0{_fb =_fb <<uint (_bd );
}else {_fb =0;};_dfe -=_bd ;if _dfe ==0{_bc =append (_bc ,_ee );_dfe =bitsPerSample ;_ee =0;_dgb ++;};};return _bc ;};type SampleReader interface{ReadSample ()(uint32 ,error );ReadSamples (_c []uint32 )error ;};func ResampleUint32 (data []uint32 ,bitsPerInputSample int ,bitsPerOutputSample int )[]uint32 {var _bg []uint32 ;
_gg :=bitsPerOutputSample ;var _bf uint32 ;var _cd uint32 ;_bgg :=0;_gcb :=0;_cf :=0;for _cf < len (data ){if _bgg > 0{_cfg :=_bgg ;if _gg < _cfg {_cfg =_gg ;};_bf =(_bf <<uint (_cfg ))|(_cd >>uint (bitsPerInputSample -_cfg ));_bgg -=_cfg ;if _bgg > 0{_cd =_cd <<uint (_cfg );
}else {_cd =0;};_gg -=_cfg ;if _gg ==0{_bg =append (_bg ,_bf );_gg =bitsPerOutputSample ;_bf =0;_gcb ++;};}else {_dgc :=data [_cf ];_cf ++;_ce :=bitsPerInputSample ;if _gg < _ce {_ce =_gg ;};_bgg =bitsPerInputSample -_ce ;_bf =(_bf <<uint (_ce ))|(_dgc >>uint (_bgg ));
if _ce < bitsPerInputSample {_cd =_dgc <<uint (_ce );};_gg -=_ce ;if _gg ==0{_bg =append (_bg ,_bf );_gg =bitsPerOutputSample ;_bf =0;_gcb ++;};};};for _bgg >=bitsPerOutputSample {_fc :=_bgg ;if _gg < _fc {_fc =_gg ;};_bf =(_bf <<uint (_fc ))|(_cd >>uint (bitsPerInputSample -_fc ));
_bgg -=_fc ;if _bgg > 0{_cd =_cd <<uint (_fc );}else {_cd =0;};_gg -=_fc ;if _gg ==0{_bg =append (_bg ,_bf );_gg =bitsPerOutputSample ;_bf =0;_gcb ++;};};if _gg > 0&&_gg < bitsPerOutputSample {_bf <<=uint (_gg );_bg =append (_bg ,_bf );};return _bg ;};
func (_gc *Reader )ReadSamples (samples []uint32 )(_df error ){for _cc :=0;_cc < len (samples );_cc ++{samples [_cc ],_df =_gc .ReadSample ();if _df !=nil {return _df ;};};return nil ;};func (_e *Reader )ReadSample ()(uint32 ,error ){if _e ._a ==_e ._fd .Height {return 0,_ff .EOF ;
};_gf ,_de :=_e ._g .ReadBits (byte (_e ._fd .BitsPerComponent ));if _de !=nil {return 0,_de ;};_e ._be --;if _e ._be ==0{_e ._be =_e ._fd .ColorComponents ;_e ._gb ++;};if _e ._gb ==_e ._fd .Width {if _e ._dg {_e ._g .ConsumeRemainingBits ();};_e ._gb =0;
_e ._a ++;};return uint32 (_gf ),nil ;};func (_fdc *Writer )WriteSamples (samples []uint32 )error {for _afg :=0;_afg < len (samples );_afg ++{if _dfd :=_fdc .WriteSample (samples [_afg ]);_dfd !=nil {return _dfd ;};};return nil ;};type SampleWriter interface{WriteSample (_cg uint32 )error ;
WriteSamples (_cce []uint32 )error ;};func NewWriter (img _d .ImageBase )*Writer {return &Writer {_dgca :_b .NewWriterMSB (img .Data ),_af :img ,_aa :img .ColorComponents ,_cad :img .BytesPerLine *8!=img .ColorComponents *img .BitsPerComponent *img .Width };
};