unipdf/internal/transform/transform.go

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// Copyright 2020 FoxyUtils ehf. All rights reserved.
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package transform ;import (_a "fmt";_ad "github.com/unidoc/unipdf/v3/common";_f "math";);func (_c Matrix )Round (precision float64 )Matrix {for _adb :=range _c {_c [_adb ]=_f .Round (_c [_adb ]/precision )*precision ;};return _c ;};func ShearMatrix (x ,y float64 )Matrix {return NewMatrix (1,y ,x ,1,0,0)};
func NewMatrixFromTransforms (xScale ,yScale ,theta ,tx ,ty float64 )Matrix {return IdentityMatrix ().Scale (xScale ,yScale ).Rotate (theta ).Translate (tx ,ty );};func (_ef *Matrix )Set (a ,b ,c ,d ,tx ,ty float64 ){_ef [0],_ef [1]=a ,b ;_ef [3],_ef [4]=c ,d ;
_ef [6],_ef [7]=tx ,ty ;_ef .clampRange ();};func (_ga *Matrix )Concat (b Matrix ){*_ga =Matrix {b [0]*_ga [0]+b [1]*_ga [3],b [0]*_ga [1]+b [1]*_ga [4],0,b [3]*_ga [0]+b [4]*_ga [3],b [3]*_ga [1]+b [4]*_ga [4],0,b [6]*_ga [0]+b [7]*_ga [3]+_ga [6],b [6]*_ga [1]+b [7]*_ga [4]+_ga [7],1};
_ga .clampRange ();};func (_d Matrix )String ()string {_de ,_gb ,_cg ,_fe ,_ac ,_ec :=_d [0],_d [1],_d [3],_d [4],_d [6],_d [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",_de ,_gb ,_cg ,_fe ,_ac ,_ec );
};func (_ff *Matrix )Clone ()Matrix {return NewMatrix (_ff [0],_ff [1],_ff [3],_ff [4],_ff [6],_ff [7])};func (_da Matrix )Singular ()bool {return _f .Abs (_da [0]*_da [4]-_da [1]*_da [3])< _ag };func (_fd Matrix )Scale (xScale ,yScale float64 )Matrix {return _fd .Mult (ScaleMatrix (xScale ,yScale ))};
func (_df Matrix )Translation ()(float64 ,float64 ){return _df [6],_df [7]};func (_g Matrix )Identity ()bool {return _g [0]==1&&_g [1]==0&&_g [2]==0&&_g [3]==0&&_g [4]==1&&_g [5]==0&&_g [6]==0&&_g [7]==0&&_g [8]==1;};func (_fee Matrix )Rotate (theta float64 )Matrix {return _fee .Mult (RotationMatrix (theta ))};
func RotationMatrix (angle float64 )Matrix {_fb :=_f .Cos (angle );_aa :=_f .Sin (angle );return NewMatrix (_fb ,_aa ,-_aa ,_fb ,0,0);};func (_fc Matrix )ScalingFactorY ()float64 {return _f .Hypot (_fc [3],_fc [4])};func (_eca Point )Distance (b Point )float64 {return _f .Hypot (_eca .X -b .X ,_eca .Y -b .Y )};
func (_add Matrix )Inverse ()(Matrix ,bool ){_gae ,_gc :=_add [0],_add [1];_gaa ,_fg :=_add [3],_add [4];_aac ,_gd :=_add [6],_add [7];_ea :=_gae *_fg -_gc *_gaa ;if _f .Abs (_ea )< _bfcd {return Matrix {},false ;};_bb ,_bf :=_fg /_ea ,-_gc /_ea ;_dbd ,_ab :=-_gaa /_ea ,_gae /_ea ;
_bfc :=-(_bb *_aac +_dbd *_gd );_edd :=-(_bf *_aac +_ab *_gd );return NewMatrix (_bb ,_bf ,_dbd ,_ab ,_bfc ,_edd ),true ;};func (_dc Matrix )Transform (x ,y float64 )(float64 ,float64 ){_db :=x *_dc [0]+y *_dc [3]+_dc [6];_ce :=x *_dc [1]+y *_dc [4]+_dc [7];
return _db ,_ce ;};func (_bfca Point )String ()string {return _a .Sprintf ("(\u0025\u002e\u0032\u0066\u002c\u0025\u002e\u0032\u0066\u0029",_bfca .X ,_bfca .Y );};type Matrix [9]float64 ;const _ag =1e-10;func (_fbda Matrix )Unrealistic ()bool {_dcc ,_gaef ,_gab ,_ecg :=_f .Abs (_fbda [0]),_f .Abs (_fbda [1]),_f .Abs (_fbda [3]),_f .Abs (_fbda [4]);
_ba :=_dcc > _ace &&_ecg > _ace ;_bg :=_gaef > _ace &&_gab > _ace ;return !(_ba ||_bg );};func (_be Point )Displace (delta Point )Point {return Point {_be .X +delta .X ,_be .Y +delta .Y }};func ScaleMatrix (x ,y float64 )Matrix {return NewMatrix (x ,0,0,y ,0,0)};
type Point struct{X float64 ;Y float64 ;};func (_bd Point )Interpolate (b Point ,t float64 )Point {return Point {X :(1-t )*_bd .X +t *b .X ,Y :(1-t )*_bd .Y +t *b .Y };};func (_cb *Point )Set (x ,y float64 ){_cb .X ,_cb .Y =x ,y };func (_ee *Point )Transform (a ,b ,c ,d ,tx ,ty float64 ){_cd :=NewMatrix (a ,b ,c ,d ,tx ,ty );
_ee .transformByMatrix (_cd );};const _af =1e9;func NewPoint (x ,y float64 )Point {return Point {X :x ,Y :y }};const _ace =1e-6;func TranslationMatrix (tx ,ty float64 )Matrix {return NewMatrix (1,0,0,1,tx ,ty )};func (_eag Point )Rotate (theta float64 )Point {_febb :=_f .Hypot (_eag .X ,_eag .Y );
_fcf :=_f .Atan2 (_eag .Y ,_eag .X );_ded ,_cgg :=_f .Sincos (_fcf +theta /180.0*_f .Pi );return Point {_febb *_cgg ,_febb *_ded };};func IdentityMatrix ()Matrix {return NewMatrix (1,0,0,1,0,0)};func (_fda *Point )transformByMatrix (_gdg Matrix ){_fda .X ,_fda .Y =_gdg .Transform (_fda .X ,_fda .Y )};
func (_dff *Matrix )clampRange (){for _fa ,_gaaa :=range _dff {if _gaaa > _af {_ad .Log .Debug ("\u0043L\u0041M\u0050\u003a\u0020\u0025\u0067\u0020\u002d\u003e\u0020\u0025\u0067",_gaaa ,_af );_dff [_fa ]=_af ;}else if _gaaa < -_af {_ad .Log .Debug ("\u0043L\u0041M\u0050\u003a\u0020\u0025\u0067\u0020\u002d\u003e\u0020\u0025\u0067",_gaaa ,-_af );
_dff [_fa ]=-_af ;};};};func (_dee *Matrix )Shear (x ,y float64 ){_dee .Concat (ShearMatrix (x ,y ))};func (_feb Matrix )Angle ()float64 {_bc :=_f .Atan2 (-_feb [1],_feb [0]);if _bc < 0.0{_bc +=2*_f .Pi ;};return _bc /_f .Pi *180.0;};func (_fbd Matrix )Mult (b Matrix )Matrix {_fbd .Concat (b );
return _fbd };const _bfcd =1.0e-6;func (_deg Matrix )Translate (tx ,ty float64 )Matrix {return _deg .Mult (TranslationMatrix (tx ,ty ))};func (_b Matrix )ScalingFactorX ()float64 {return _f .Hypot (_b [0],_b [1])};func NewMatrix (a ,b ,c ,d ,tx ,ty float64 )Matrix {_ed :=Matrix {a ,b ,0,c ,d ,0,tx ,ty ,1};
_ed .clampRange ();return _ed ;};