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35 lines
3.4 KiB
Go
35 lines
3.4 KiB
Go
//
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// Copyright 2020 FoxyUtils ehf. All rights reserved.
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//
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// This is a commercial product and requires a license to operate.
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// A trial license can be obtained at https://unidoc.io
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//
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// DO NOT EDIT: generated by unitwist Go source code obfuscator.
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//
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// Use of this source code is governed by the UniDoc End User License Agreement
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// terms that can be accessed at https://unidoc.io/eula/
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package pdfutil ;import (_b "github.com/unidoc/unipdf/v3/common";_a "github.com/unidoc/unipdf/v3/contentstream";_fe "github.com/unidoc/unipdf/v3/contentstream/draw";_f "github.com/unidoc/unipdf/v3/core";_eg "github.com/unidoc/unipdf/v3/model";);
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// NormalizePage performs the following operations on the passed in page:
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// - Normalize the page rotation.
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// Rotates the contents of the page according to the Rotate entry, thus
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// flattening the rotation. The Rotate entry of the page is set to nil.
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// - Normalize the media box.
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// If the media box of the page is offsetted (Llx != 0 or Lly != 0),
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// the contents of the page are translated to (-Llx, -Lly). After
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// normalization, the media box is updated (Llx and Lly are set to 0 and
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// Urx and Ury are updated accordingly).
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// - Normalize the crop box.
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// The crop box of the page is updated based on the previous operations.
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// After normalization, the page should look the same if openend using a
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// PDF viewer.
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// NOTE: This function does not normalize annotations, outlines other parts
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// that are not part of the basic geometry and page content streams.
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func NormalizePage (page *_eg .PdfPage )error {_g ,_ge :=page .GetMediaBox ();if _ge !=nil {return _ge ;};_af ,_ge :=page .GetRotate ();if _ge !=nil {_b .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",_ge .Error ());
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};_ag :=_af %360!=0&&_af %90==0;_g .Normalize ();_gb ,_fed ,_be ,_fb :=_g .Llx ,_g .Lly ,_g .Width (),_g .Height ();_agf :=_gb !=0||_fed !=0;if !_ag &&!_agf {return nil ;};_fbf :=func (_d ,_dg ,_ege float64 )_fe .BoundingBox {return _fe .Path {Points :[]_fe .Point {_fe .NewPoint (0,0).Rotate (_ege ),_fe .NewPoint (_d ,0).Rotate (_ege ),_fe .NewPoint (0,_dg ).Rotate (_ege ),_fe .NewPoint (_d ,_dg ).Rotate (_ege )}}.GetBoundingBox ();
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};_aa :=_a .NewContentCreator ();var _gc float64 ;if _ag {_gc =-float64 (_af );_ac :=_fbf (_be ,_fb ,_gc );_aa .Translate ((_ac .Width -_be )/2+_be /2,(_ac .Height -_fb )/2+_fb /2);_aa .RotateDeg (_gc );_aa .Translate (-_be /2,-_fb /2);_be ,_fb =_ac .Width ,_ac .Height ;
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};if _agf {_aa .Translate (-_gb ,-_fed );};_gbe :=_aa .Operations ();_fg ,_ge :=_f .MakeStream (_gbe .Bytes (),_f .NewFlateEncoder ());if _ge !=nil {return _ge ;};_ef :=_f .MakeArray (_fg );_ef .Append (page .GetContentStreamObjs ()...);*_g =_eg .PdfRectangle {Urx :_be ,Ury :_fb };
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if _bed :=page .CropBox ;_bed !=nil {_bed .Normalize ();_c ,_bg ,_afa ,_ce :=_bed .Llx -_gb ,_bed .Lly -_fed ,_bed .Width (),_bed .Height ();if _ag {_cb :=_fbf (_afa ,_ce ,_gc );_afa ,_ce =_cb .Width ,_cb .Height ;};*_bed =_eg .PdfRectangle {Llx :_c ,Lly :_bg ,Urx :_c +_afa ,Ury :_bg +_ce };
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};_b .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",_gc ,_gbe ,_g );page .Contents =_ef ;page .Rotate =nil ;
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return nil ;}; |