220 lines
8.8 KiB
C#
220 lines
8.8 KiB
C#
using System;
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using iTextSharp.text;
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/*
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* Copyright 2002 by Paulo Soares.
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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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/** Implements the Postnet and Planet barcodes. The default parameters are:
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* <pre>
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*n = 72f / 22f; // distance between bars
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*x = 0.02f * 72f; // bar width
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*barHeight = 0.125f * 72f; // height of the tall bars
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*size = 0.05f * 72f; // height of the short bars
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*codeType = POSTNET; // type of code
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* </pre>
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*
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* @author Paulo Soares (psoares@consiste.pt)
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*/
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public class BarcodePostnet : Barcode{
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/** The bars for each character.
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*/
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private static readonly byte[][] BARS = {
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new byte[] {1,1,0,0,0},
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new byte[] {0,0,0,1,1},
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new byte[] {0,0,1,0,1},
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new byte[] {0,0,1,1,0},
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new byte[] {0,1,0,0,1},
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new byte[] {0,1,0,1,0},
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new byte[] {0,1,1,0,0},
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new byte[] {1,0,0,0,1},
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new byte[] {1,0,0,1,0},
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new byte[] {1,0,1,0,0}
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};
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/** Creates new BarcodePostnet */
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public BarcodePostnet() {
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n = 72f / 22f; // distance between bars
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x = 0.02f * 72f; // bar width
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barHeight = 0.125f * 72f; // height of the tall bars
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size = 0.05f * 72f; // height of the short bars
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codeType = POSTNET; // type of code
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}
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/** Creates the bars for Postnet.
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* @param text the code to be created without checksum
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* @return the bars
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*/
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public static byte[] GetBarsPostnet(string text) {
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int total = 0;
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for (int k = text.Length - 1; k >= 0; --k) {
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int n = text[k] - '0';
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total += n;
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}
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text += (char)(((10 - (total % 10)) % 10) + '0');
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byte[] bars = new byte[text.Length * 5 + 2];
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bars[0] = 1;
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bars[bars.Length - 1] = 1;
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for (int k = 0; k < text.Length; ++k) {
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int c = text[k] - '0';
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Array.Copy(BARS[c], 0, bars, k * 5 + 1, 5);
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}
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return bars;
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}
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/** Gets the maximum area that the barcode and the text, if
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* any, will occupy. The lower left corner is always (0, 0).
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* @return the size the barcode occupies.
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*/
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public override Rectangle BarcodeSize {
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get {
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float width = ((code.Length + 1) * 5 + 1) * n + x;
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return new Rectangle(width, barHeight);
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}
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}
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/** Places the barcode in a <CODE>PdfContentByte</CODE>. The
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* barcode is always placed at coodinates (0, 0). Use the
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* translation matrix to move it elsewhere.<p>
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* The bars and text are written in the following colors:<p>
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* <P><TABLE BORDER=1>
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* <TR>
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* <TH><P><CODE>barColor</CODE></TH>
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* <TH><P><CODE>textColor</CODE></TH>
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* <TH><P>Result</TH>
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* </TR>
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* <TR>
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* <TD><P><CODE>null</CODE></TD>
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* <TD><P><CODE>null</CODE></TD>
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* <TD><P>bars and text painted with current fill color</TD>
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* </TR>
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* <TR>
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* <TD><P><CODE>barColor</CODE></TD>
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* <TD><P><CODE>null</CODE></TD>
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* <TD><P>bars and text painted with <CODE>barColor</CODE></TD>
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* </TR>
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* <TR>
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* <TD><P><CODE>null</CODE></TD>
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* <TD><P><CODE>textColor</CODE></TD>
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* <TD><P>bars painted with current color<br>text painted with <CODE>textColor</CODE></TD>
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* </TR>
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* <TR>
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* <TD><P><CODE>barColor</CODE></TD>
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* <TD><P><CODE>textColor</CODE></TD>
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* <TD><P>bars painted with <CODE>barColor</CODE><br>text painted with <CODE>textColor</CODE></TD>
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* </TR>
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* </TABLE>
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* @param cb the <CODE>PdfContentByte</CODE> where the barcode will be placed
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* @param barColor the color of the bars. It can be <CODE>null</CODE>
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* @param textColor the color of the text. It can be <CODE>null</CODE>
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* @return the dimensions the barcode occupies
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*/
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public override Rectangle PlaceBarcode(PdfContentByte cb, Color barColor, Color textColor) {
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if (barColor != null)
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cb.SetColorFill(barColor);
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byte[] bars = GetBarsPostnet(code);
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byte flip = 1;
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if (codeType == PLANET) {
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flip = 0;
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bars[0] = 0;
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bars[bars.Length - 1] = 0;
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}
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float startX = 0;
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for (int k = 0; k < bars.Length; ++k) {
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cb.Rectangle(startX, 0, x - inkSpreading, bars[k] == flip ? barHeight : size);
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startX += n;
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}
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cb.Fill();
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return this.BarcodeSize;
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}
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public override System.Drawing.Image CreateDrawingImage(System.Drawing.Color foreground, System.Drawing.Color background) {
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int barWidth = (int)x;
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if (barWidth <= 0)
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barWidth = 1;
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int barDistance = (int)n;
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if (barDistance <= barWidth)
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barDistance = barWidth + 1;
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int barShort = (int)size;
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if (barShort <= 0)
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barShort = 1;
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int barTall = (int)barHeight;
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if (barTall <= barShort)
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barTall = barShort + 1;
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byte[] bars = GetBarsPostnet(code);
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int width = bars.Length * barDistance;
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byte flip = 1;
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if (codeType == PLANET) {
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flip = 0;
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bars[0] = 0;
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bars[bars.Length - 1] = 0;
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}
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System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(width, barTall);
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int seg1 = barTall - barShort;
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for (int i = 0; i < seg1; ++i) {
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int idx = 0;
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for (int k = 0; k < bars.Length; ++k) {
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bool dot = (bars[k] == flip);
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for (int j = 0; j < barDistance; ++j) {
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bmp.SetPixel(idx++, i, (dot && j < barWidth) ? foreground : background);
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}
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}
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}
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for (int i = seg1; i < barTall; ++i) {
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int idx = 0;
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for (int k = 0; k < bars.Length; ++k) {
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for (int j = 0; j < barDistance; ++j) {
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bmp.SetPixel(idx++, i, (j < barWidth) ? foreground : background);
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}
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}
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}
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return bmp;
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}
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}
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}
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