unipdf/internal/transform/transform.go

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package transform ;import (_a "fmt";_cd "github.com/unidoc/unipdf/v3/common";_f "math";);const _db =1e-10;func (_agb *Matrix )Set (a ,b ,c ,d ,tx ,ty float64 ){_agb [0],_agb [1]=a ,b ;_agb [3],_agb [4]=c ,d ;_agb [6],_agb [7]=tx ,ty ;_agb .clampRange ();
};const _ecf =1e9;func (_fea Matrix )Scale (xScale ,yScale float64 )Matrix {return _fea .Mult (ScaleMatrix (xScale ,yScale ));};func (_gf *Matrix )clampRange (){for _de ,_fa :=range _gf {if _fa > _ecf {_cd .Log .Debug ("\u0043L\u0041M\u0050\u003a\u0020\u0025\u0067\u0020\u002d\u003e\u0020\u0025\u0067",_fa ,_ecf );
_gf [_de ]=_ecf ;}else if _fa < -_ecf {_cd .Log .Debug ("\u0043L\u0041M\u0050\u003a\u0020\u0025\u0067\u0020\u002d\u003e\u0020\u0025\u0067",_fa ,-_ecf );_gf [_de ]=-_ecf ;};};};type Matrix [9]float64 ;func (_dcfb *Point )Set (x ,y float64 ){_dcfb .X ,_dcfb .Y =x ,y };
func (_e Matrix )Round (precision float64 )Matrix {for _ag :=range _e {_e [_ag ]=_f .Round (_e [_ag ]/precision )*precision ;};return _e ;};func (_cc Matrix )String ()string {_ad ,_b ,_bf ,_fe ,_fee ,_eb :=_cc [0],_cc [1],_cc [3],_cc [4],_cc [6],_cc [7];
return _a .Sprintf ("\u005b\u00257\u002e\u0034\u0066\u002c%\u0037\u002e4\u0066\u002c\u0025\u0037\u002e\u0034\u0066\u002c%\u0037\u002e\u0034\u0066\u003a\u0025\u0037\u002e\u0034\u0066\u002c\u00257\u002e\u0034\u0066\u005d",_ad ,_b ,_bf ,_fe ,_fee ,_eb );};
func (_bd *Point )Transform (a ,b ,c ,d ,tx ,ty float64 ){_eba :=NewMatrix (a ,b ,c ,d ,tx ,ty );_bd .transformByMatrix (_eba );};func (_dc Matrix )ScalingFactorY ()float64 {return _f .Hypot (_dc [3],_dc [4])};func (_cef Point )String ()string {return _a .Sprintf ("(\u0025\u002e\u0032\u0066\u002c\u0025\u002e\u0032\u0066\u0029",_cef .X ,_cef .Y );
};func (_ef Matrix )Identity ()bool {return _ef [0]==1&&_ef [1]==0&&_ef [2]==0&&_ef [3]==0&&_ef [4]==1&&_ef [5]==0&&_ef [6]==0&&_ef [7]==0&&_ef [8]==1;};func (_fb Matrix )Mult (b Matrix )Matrix {_fb .Concat (b );return _fb };func (_dba Matrix )Unrealistic ()bool {_agd ,_bga ,_dee ,_gag :=_f .Abs (_dba [0]),_f .Abs (_dba [1]),_f .Abs (_dba [3]),_f .Abs (_dba [4]);
_dg :=_agd > _bgf &&_gag > _bgf ;_be :=_bga > _bgf &&_dee > _bgf ;return !(_dg ||_be );};func (_efb Matrix )Translation ()(float64 ,float64 ){return _efb [6],_efb [7]};func ScaleMatrix (x ,y float64 )Matrix {return NewMatrix (x ,0,0,y ,0,0)};func (_ebg Matrix )Singular ()bool {return _f .Abs (_ebg [0]*_ebg [4]-_ebg [1]*_ebg [3])< _db };
func (_abf *Matrix )Clone ()Matrix {return NewMatrix (_abf [0],_abf [1],_abf [3],_abf [4],_abf [6],_abf [7]);};const _bgf =1e-6;func (_ab Matrix )Rotate (theta float64 )Matrix {return _ab .Mult (RotationMatrix (theta ))};func (_bg Matrix )ScalingFactorX ()float64 {return _f .Hypot (_bg [0],_bg [1])};
func (_ge Point )Rotate (theta float64 )Point {_efc :=_f .Hypot (_ge .X ,_ge .Y );_da :=_f .Atan2 (_ge .Y ,_ge .X );_dec ,_cde :=_f .Sincos (_da +theta /180.0*_f .Pi );return Point {_efc *_cde ,_efc *_dec };};func (_ee Point )Displace (delta Point )Point {return Point {_ee .X +delta .X ,_ee .Y +delta .Y }};
func TranslationMatrix (tx ,ty float64 )Matrix {return NewMatrix (1,0,0,1,tx ,ty )};func (_adf *Point )transformByMatrix (_bdg Matrix ){_adf .X ,_adf .Y =_bdg .Transform (_adf .X ,_adf .Y )};func ShearMatrix (x ,y float64 )Matrix {return NewMatrix (1,y ,x ,1,0,0)};
func (_ea *Matrix )Shear (x ,y float64 ){_ea .Concat (ShearMatrix (x ,y ))};func NewMatrix (a ,b ,c ,d ,tx ,ty float64 )Matrix {_g :=Matrix {a ,b ,0,c ,d ,0,tx ,ty ,1};_g .clampRange ();return _g ;};func (_ga Matrix )Transform (x ,y float64 )(float64 ,float64 ){_df :=x *_ga [0]+y *_ga [3]+_ga [6];
_ada :=x *_ga [1]+y *_ga [4]+_ga [7];return _df ,_ada ;};func (_aegd Point )Distance (b Point )float64 {return _f .Hypot (_aegd .X -b .X ,_aegd .Y -b .Y )};func NewMatrixFromTransforms (xScale ,yScale ,theta ,tx ,ty float64 )Matrix {return IdentityMatrix ().Scale (xScale ,yScale ).Rotate (theta ).Translate (tx ,ty );
};func (_dcf Matrix )Inverse ()(Matrix ,bool ){_ec ,_gc :=_dcf [0],_dcf [1];_dd ,_dbc :=_dcf [3],_dcf [4];_fba ,_ae :=_dcf [6],_dcf [7];_bge :=_ec *_dbc -_gc *_dd ;if _f .Abs (_bge )< _agc {return Matrix {},false ;};_bff ,_ff :=_dbc /_bge ,-_gc /_bge ;
_ecc ,_cg :=-_dd /_bge ,_ec /_bge ;_aeg :=-(_bff *_fba +_ecc *_ae );_aa :=-(_ff *_fba +_cg *_ae );return NewMatrix (_bff ,_ff ,_ecc ,_cg ,_aeg ,_aa ),true ;};func RotationMatrix (angle float64 )Matrix {_d :=_f .Cos (angle );_fc :=_f .Sin (angle );return NewMatrix (_d ,_fc ,-_fc ,_d ,0,0);
};func IdentityMatrix ()Matrix {return NewMatrix (1,0,0,1,0,0)};type Point struct{X float64 ;Y float64 ;};func (_ce *Matrix )Concat (b Matrix ){*_ce =Matrix {b [0]*_ce [0]+b [1]*_ce [3],b [0]*_ce [1]+b [1]*_ce [4],0,b [3]*_ce [0]+b [4]*_ce [3],b [3]*_ce [1]+b [4]*_ce [4],0,b [6]*_ce [0]+b [7]*_ce [3]+_ce [6],b [6]*_ce [1]+b [7]*_ce [4]+_ce [7],1};
_ce .clampRange ();};func (_eg Matrix )Angle ()float64 {_bc :=_f .Atan2 (-_eg [1],_eg [0]);if _bc < 0.0{_bc +=2*_f .Pi ;};return _bc /_f .Pi *180.0;};func NewPoint (x ,y float64 )Point {return Point {X :x ,Y :y }};func (_ffc Point )Interpolate (b Point ,t float64 )Point {return Point {X :(1-t )*_ffc .X +t *b .X ,Y :(1-t )*_ffc .Y +t *b .Y };
};func (_bfa Matrix )Translate (tx ,ty float64 )Matrix {return _bfa .Mult (TranslationMatrix (tx ,ty ))};const _agc =1.0e-6;