148 lines
6.7 KiB
C#
148 lines
6.7 KiB
C#
using System;
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using System.IO;
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using iTextSharp.text;
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using System.util.zlib;
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/*
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* $Id: PdfContents.cs,v 1.4 2008/05/13 11:25:19 psoares33 Exp $
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*
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*
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* Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the License.
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*
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* The Original Code is 'iText, a free JAVA-PDF library'.
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*
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* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
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* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
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* All Rights Reserved.
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* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
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* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
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*
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* Contributor(s): all the names of the contributors are added in the source code
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* where applicable.
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*
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* Alternatively, the contents of this file may be used under the terms of the
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* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
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* provisions of LGPL are applicable instead of those above. If you wish to
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* allow use of your version of this file only under the terms of the LGPL
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* License and not to allow others to use your version of this file under
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* the MPL, indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by the LGPL.
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* If you do not delete the provisions above, a recipient may use your version
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* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the MPL as stated above or under the terms of the GNU
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* Library General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
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* details.
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*
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* If you didn't download this code from the following link, you should check if
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* you aren't using an obsolete version:
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* http://www.lowagie.com/iText/
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*/
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namespace iTextSharp.text.pdf {
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/**
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* <CODE>PdfContents</CODE> is a <CODE>PdfStream</CODE> containing the contents (text + graphics) of a <CODE>PdfPage</CODE>.
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*/
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public class PdfContents : PdfStream {
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internal static byte[] SAVESTATE = DocWriter.GetISOBytes("q\n");
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internal static byte[] RESTORESTATE = DocWriter.GetISOBytes("Q\n");
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internal static byte[] ROTATE90 = DocWriter.GetISOBytes("0 1 -1 0 ");
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internal static byte[] ROTATE180 = DocWriter.GetISOBytes("-1 0 0 -1 ");
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internal static byte[] ROTATE270 = DocWriter.GetISOBytes("0 -1 1 0 ");
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internal static byte[] ROTATEFINAL = DocWriter.GetISOBytes(" cm\n");
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// constructor
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/**
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* Constructs a <CODE>PdfContents</CODE>-object, containing text and general graphics.
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*
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* @param under the direct content that is under all others
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* @param content the graphics in a page
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* @param text the text in a page
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* @param secondContent the direct content that is over all others
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* @throws BadPdfFormatException on error
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*/
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internal PdfContents(PdfContentByte under, PdfContentByte content, PdfContentByte text, PdfContentByte secondContent, Rectangle page) : base() {
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Stream ostr = null;
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streamBytes = new MemoryStream();
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if (Document.Compress) {
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compressed = true;
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ostr = new ZDeflaterOutputStream(streamBytes, text.PdfWriter.CompressionLevel);
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}
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else
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ostr = streamBytes;
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int rotation = page.Rotation;
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byte[] tmp;
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switch (rotation) {
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case 90:
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ostr.Write(ROTATE90, 0, ROTATE90.Length);
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tmp = DocWriter.GetISOBytes(ByteBuffer.FormatDouble(page.Top));
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ostr.Write(tmp, 0, tmp.Length);
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ostr.WriteByte((byte)' ');
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ostr.WriteByte((byte)'0');
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ostr.Write(ROTATEFINAL, 0, ROTATEFINAL.Length);
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break;
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case 180:
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ostr.Write(ROTATE180, 0, ROTATE180.Length);
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tmp = DocWriter.GetISOBytes(ByteBuffer.FormatDouble(page.Right));
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ostr.Write(tmp, 0, tmp.Length);
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ostr.WriteByte((byte)' ');
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tmp = DocWriter.GetISOBytes(ByteBuffer.FormatDouble(page.Top));
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ostr.Write(tmp, 0, tmp.Length);
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ostr.Write(ROTATEFINAL, 0, ROTATEFINAL.Length);
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break;
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case 270:
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ostr.Write(ROTATE270, 0, ROTATE270.Length);
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ostr.WriteByte((byte)'0');
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ostr.WriteByte((byte)' ');
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tmp = DocWriter.GetISOBytes(ByteBuffer.FormatDouble(page.Right));
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ostr.Write(tmp, 0, tmp.Length);
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ostr.Write(ROTATEFINAL, 0, ROTATEFINAL.Length);
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break;
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}
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if (under.Size > 0) {
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ostr.Write(SAVESTATE, 0, SAVESTATE.Length);
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under.InternalBuffer.WriteTo(ostr);
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ostr.Write(RESTORESTATE, 0, RESTORESTATE.Length);
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}
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if (content.Size > 0) {
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ostr.Write(SAVESTATE, 0, SAVESTATE.Length);
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content.InternalBuffer.WriteTo(ostr);
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ostr.Write(RESTORESTATE, 0, RESTORESTATE.Length);
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}
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if (text != null) {
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ostr.Write(SAVESTATE, 0, SAVESTATE.Length);
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text.InternalBuffer.WriteTo(ostr);
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ostr.Write(RESTORESTATE, 0, RESTORESTATE.Length);
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}
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if (secondContent.Size > 0) {
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secondContent.InternalBuffer.WriteTo(ostr);
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}
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if (ostr is ZDeflaterOutputStream)
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((ZDeflaterOutputStream)ostr).Finish();
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Put(PdfName.LENGTH, new PdfNumber(streamBytes.Length));
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if (compressed)
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Put(PdfName.FILTER, PdfName.FLATEDECODE);
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}
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}
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} |