github.com/unidoc/unipdf/v3@v3.55.0/pdfutil/pdfutil.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 pdfutil ;import (_c "github.com/unidoc/unipdf/v3/common";_d "github.com/unidoc/unipdf/v3/contentstream";_a "github.com/unidoc/unipdf/v3/contentstream/draw";_ce "github.com/unidoc/unipdf/v3/core";_ge "github.com/unidoc/unipdf/v3/model";);

// NormalizePage performs the following operations on the passed in page:
// - Normalize the page rotation.
//   Rotates the contents of the page according to the Rotate entry, thus
//   flattening the rotation. The Rotate entry of the page is set to nil.
// - Normalize the media box.
//   If the media box of the page is offsetted (Llx != 0 or Lly != 0),
//   the contents of the page are translated to (-Llx, -Lly). After
//   normalization, the media box is updated (Llx and Lly are set to 0 and
//   Urx and Ury are updated accordingly).
// - Normalize the crop box.
//   The crop box of the page is updated based on the previous operations.
// After normalization, the page should look the same if openend using a
// PDF viewer.
// NOTE: This function does not normalize annotations, outlines other parts
// that are not part of the basic geometry and page content streams.
func NormalizePage (page *_ge .PdfPage )error {_gee ,_db :=page .GetMediaBox ();if _db !=nil {return _db ;};_ad ,_db :=page .GetRotate ();if _db !=nil {_c .Log .Debug ("\u0045\u0052R\u004f\u0052\u003a\u0020\u0025\u0073\u0020\u002d\u0020\u0069\u0067\u006e\u006f\u0072\u0069\u006e\u0067\u0020\u0061\u006e\u0064\u0020\u0061\u0073\u0073\u0075\u006d\u0069\u006e\u0067\u0020\u006e\u006f\u0020\u0072\u006f\u0074\u0061\u0074\u0069\u006f\u006e\u000a",_db .Error ());
};_e :=_ad %360!=0&&_ad %90==0;_gee .Normalize ();_gg ,_ed ,_b ,_ae :=_gee .Llx ,_gee .Lly ,_gee .Width (),_gee .Height ();_ga :=_gg !=0||_ed !=0;if !_e &&!_ga {return nil ;};_f :=func (_dg ,_gb ,_dbb float64 )_a .BoundingBox {return _a .Path {Points :[]_a .Point {_a .NewPoint (0,0).Rotate (_dbb ),_a .NewPoint (_dg ,0).Rotate (_dbb ),_a .NewPoint (0,_gb ).Rotate (_dbb ),_a .NewPoint (_dg ,_gb ).Rotate (_dbb )}}.GetBoundingBox ();
};_ba :=_d .NewContentCreator ();var _bg float64 ;if _e {_bg =-float64 (_ad );_fb :=_f (_b ,_ae ,_bg );_ba .Translate ((_fb .Width -_b )/2+_b /2,(_fb .Height -_ae )/2+_ae /2);_ba .RotateDeg (_bg );_ba .Translate (-_b /2,-_ae /2);_b ,_ae =_fb .Width ,_fb .Height ;
};if _ga {_ba .Translate (-_gg ,-_ed );};_df :=_ba .Operations ();_bad ,_db :=_ce .MakeStream (_df .Bytes (),_ce .NewFlateEncoder ());if _db !=nil {return _db ;};_fd :=_ce .MakeArray (_bad );_fd .Append (page .GetContentStreamObjs ()...);*_gee =_ge .PdfRectangle {Urx :_b ,Ury :_ae };
if _gf :=page .CropBox ;_gf !=nil {_gf .Normalize ();_dd ,_cd ,_bd ,_gac :=_gf .Llx -_gg ,_gf .Lly -_ed ,_gf .Width (),_gf .Height ();if _e {_bc :=_f (_bd ,_gac ,_bg );_bd ,_gac =_bc .Width ,_bc .Height ;};*_gf =_ge .PdfRectangle {Llx :_dd ,Lly :_cd ,Urx :_dd +_bd ,Ury :_cd +_gac };
};_c .Log .Debug ("\u0052\u006f\u0074\u0061\u0074\u0065\u003d\u0025\u0066\u00b0\u0020\u004f\u0070\u0073\u003d%\u0071 \u004d\u0065\u0064\u0069\u0061\u0042\u006f\u0078\u003d\u0025\u002e\u0032\u0066",_bg ,_df ,_gee );page .Contents =_fd ;page .Rotate =nil ;
return nil ;};