View difference between Paste ID: KZGq7D0R and 5qRYp04Y

-//
+
-// GhostscriptViewerPdfFormatHandler.cs
+
-// This file is part of Ghostscript.NET library
+
-//
+
-// Author: Josip Habjan (habjan@gmail.com, http://www.linkedin.com/in/habjan)
+
-// Copyright (c) 2013-2014 by Josip Habjan. All rights reserved.
+
-//
+
-// Author ported some parts of this code from GSView.
+
-//
+
-// Permission is hereby granted, free of charge, to any person obtaining
+
-// a copy of this software and associated documentation files (the
+
-// "Software"), to deal in the Software without restriction, including
+
-// without limitation the rights to use, copy, modify, merge, publish,
+
-// distribute, sublicense, and/or sell copies of the Software, and to
+
-// permit persons to whom the Software is furnished to do so, subject to
+
-// the following conditions:
+
-//
+
-// The above copyright notice and this permission notice shall be
+
-// included in all copies or substantial portions of the Software.
+
-//
+
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+
-// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+
-// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+
-// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+
-// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+
-// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
 
         public override void Initialize()
         {
             // define our routine for preparing to show a page.
             // This writes out some tags which we capture in the
             // callback to obtain the page size and orientation.
             this.Execute(string.Format(@"
                 /GSNETViewer_PDFpage {{
         	        ({0}) print dup == flush
         	        pdfgetpage /Page exch store
                     Page /MediaBox pget
                     {{ ({1}) print == flush  }}
         	        if
                     Page /CropBox pget
          	        {{ ({2}) print == flush }}
         	        if
                     Page /Rotate pget not {{ 0 }} if
         	        ({3}) print == flush
                 }} def", PDF_PAGE_TAG, PDF_MEDIA_TAG, PDF_CROP_TAG, PDF_ROTATE_TAG));
 
             // put these in userdict so we can write to them later
             this.Execute(@"
                     /Page null def
                     /Page# 0 def
                     /PDFSave null def
                     /DSCPageCount 0 def
                 ");
 
             // open PDF support dictionaries
             this.Execute(@"
                     GS_PDF_ProcSet begin
                     pdfdict begin");
         }
 
         #endregion
 
         #region Open
 
         public override void Open(string filePath)
         {
             // open PDF file
             this.Execute(string.Format("({0}) (r) file pdfopen begin", filePath.Replace("\\", "/")));
 
             this.Execute("/FirstPage where { pop FirstPage } { 1 } ifelse");
             this.Execute("/LastPage where { pop LastPage } { pdfpagecount } ifelse");
 
             // flush stdout and then send PDF page marker to stdout where we capture the page numbers via callback
             this.Execute(string.Format("flush ({0}) print exch =only ( ) print =only (\n) print flush", PDF_PAGES_TAG));
         }
 
         #endregion
 
         #region StdInput
 
         public override void StdInput(out string input, int count)
         {
             input = string.Empty;
         }
 
         #endregion
 
         #region StdOutput
 
         public override void StdOutput(string message)
         {
             if (message.Contains(PDF_TAG))
             {
                 int startPos = message.IndexOf(PDF_TAG);
                 int endPos = message.IndexOf(": ");
 
                 string tag = message.Substring(startPos, endPos + 2);
                 string rest = message.Substring(endPos + 2, message.Length - endPos - 2);
 
                 switch (tag)
                 {
                     case PDF_PAGES_TAG:
                         {
                             string[] pages = rest.Split(new char[] { ' ' });
                             this.FirstPageNumber = int.Parse(pages[0]);
                             this.LastPageNumber = int.Parse(pages[1]);
                         }
                         break;
                     case PDF_PAGE_TAG:
                         {
                             this.CurrentPageNumber = int.Parse(rest);
                             break;
                         }
                     case PDF_MEDIA_TAG:
                         {
                             string[] mb = rest.Split(new char[] { ' ' });
                             this.MediaBox = new GhostscriptRectangle(
                                     float.Parse(mb[0].TrimStart('['), System.Globalization.CultureInfo.InvariantCulture),
                                     float.Parse(mb[1], System.Globalization.CultureInfo.InvariantCulture),
                                     float.Parse(mb[2], System.Globalization.CultureInfo.InvariantCulture),
                                     float.Parse(mb[3].TrimEnd(']'), System.Globalization.CultureInfo.InvariantCulture));
                             break;
                         }
                     case PDF_CROP_TAG:
                         {
                             string[] cb = rest.Split(new char[] { ' ' });
                             this.CropBox = new GhostscriptRectangle(
                                     float.Parse(cb[0].TrimStart('['), System.Globalization.CultureInfo.InvariantCulture),
                                     float.Parse(cb[1], System.Globalization.CultureInfo.InvariantCulture),
                                     float.Parse(cb[2], System.Globalization.CultureInfo.InvariantCulture),
                                     float.Parse(cb[3].TrimEnd(']'), System.Globalization.CultureInfo.InvariantCulture));
 
                             break;
                         }
                     case PDF_ROTATE_TAG:
                         {
                             int rotate = int.Parse(rest);
 
                             while (rotate < 0)
                             {
                                 rotate += 360;
                             }
 
                             while (rotate >= 360)
                             {
                                 rotate -= 360;
                             }
 
                             switch (rotate)
                             {
                                 case 90:
                                     this.PageOrientation = GhostscriptPageOrientation.Landscape;
                                     break;
                                 case 180:
                                     this.PageOrientation = GhostscriptPageOrientation.UpsideDown;
                                     break;
                                 case 270:
                                     this.PageOrientation = GhostscriptPageOrientation.Seascape;
                                     break;
                                 default:
                                     this.PageOrientation = GhostscriptPageOrientation.Portrait;
                                     break;
                             }
 
                             break;
                         }
                 }
             }
         }
 
         #endregion
 
         #region StdError
 
         public override void StdError(string message)
         {
 
         }
 
         #endregion
 
         #region InitPage
 
         public override void InitPage(int pageNumber)
         {
             if (pageNumber >= this.FirstPageNumber && pageNumber <= this.LastPageNumber)
             {
                 this.Execute(string.Format("{0} GSNETViewer_PDFpage", pageNumber));
             }
             else
             {
                 throw new GhostscriptException("Page number is not in pages number range!");
             }
         }
 
         #endregion
 
         #region ShowPage
 
         public override void ShowPage(int pageNumber)
         {
             if (pageNumber >= this.FirstPageNumber && pageNumber <= this.LastPageNumber)
             {
                 this.Execute("Page pdfshowpage_init pdfshowpage_finish");
             }
             else
             {
                 throw new GhostscriptException("Page number is not in pages number range!");
             }
         }
 
         #endregion
 
     }
 }