Java tutorial
/* * Copyright 2002 by Paulo Soares. * * The contents of this file are subject to the Mozilla Public License Version 1.1 * (the "License"); you may not use this file except in compliance with the License. * You may obtain a copy of the License at http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the License. * * The Original Code is 'iText, a free JAVA-PDF library'. * * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. * All Rights Reserved. * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. * * Contributor(s): all the names of the contributors are added in the source code * where applicable. * * Alternatively, the contents of this file may be used under the terms of the * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the * provisions of LGPL are applicable instead of those above. If you wish to * allow use of your version of this file only under the terms of the LGPL * License and not to allow others to use your version of this file under * the MPL, indicate your decision by deleting the provisions above and * replace them with the notice and other provisions required by the LGPL. * If you do not delete the provisions above, a recipient may use your version * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. * * This library is free software; you can redistribute it and/or modify it * under the terms of the MPL as stated above or under the terms of the GNU * Library General Public License as published by the Free Software Foundation; * either version 2 of the License, or any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more * details. * * If you didn't download this code from the following link, you should check if * you aren't using an obsolete version: * http://www.lowagie.com/iText/ */ package com.lowagie.text.pdf; import java.awt.Canvas; import java.awt.Color; import java.awt.Image; import java.awt.image.MemoryImageSource; import java.util.Arrays; import com.lowagie.text.ExceptionConverter; import com.lowagie.text.Rectangle; /** Generates barcodes in several formats: EAN13, EAN8, UPCA, UPCE, * supplemental 2 and 5. The default parameters are: * <pre> *x = 0.8f; *font = BaseFont.createFont("Helvetica", "winansi", false); *size = 8; *baseline = size; *barHeight = size * 3; *guardBars = true; *codeType = EAN13; *code = ""; * </pre> * * @author Paulo Soares (psoares@consiste.pt) */ public class BarcodeEAN extends Barcode { /** The bar positions that are guard bars.*/ private static final int GUARD_EMPTY[] = {}; /** The bar positions that are guard bars.*/ private static final int GUARD_UPCA[] = { 0, 2, 4, 6, 28, 30, 52, 54, 56, 58 }; /** The bar positions that are guard bars.*/ private static final int GUARD_EAN13[] = { 0, 2, 28, 30, 56, 58 }; /** The bar positions that are guard bars.*/ private static final int GUARD_EAN8[] = { 0, 2, 20, 22, 40, 42 }; /** The bar positions that are guard bars.*/ private static final int GUARD_UPCE[] = { 0, 2, 28, 30, 32 }; /** The x coordinates to place the text.*/ private static final float TEXTPOS_EAN13[] = { 6.5f, 13.5f, 20.5f, 27.5f, 34.5f, 41.5f, 53.5f, 60.5f, 67.5f, 74.5f, 81.5f, 88.5f }; /** The x coordinates to place the text.*/ private static final float TEXTPOS_EAN8[] = { 6.5f, 13.5f, 20.5f, 27.5f, 39.5f, 46.5f, 53.5f, 60.5f }; /** The basic bar widths.*/ private static final byte BARS[][] = { { 3, 2, 1, 1 }, // 0 { 2, 2, 2, 1 }, // 1 { 2, 1, 2, 2 }, // 2 { 1, 4, 1, 1 }, // 3 { 1, 1, 3, 2 }, // 4 { 1, 2, 3, 1 }, // 5 { 1, 1, 1, 4 }, // 6 { 1, 3, 1, 2 }, // 7 { 1, 2, 1, 3 }, // 8 { 3, 1, 1, 2 } // 9 }; /** The total number of bars for EAN13.*/ private static final int TOTALBARS_EAN13 = 11 + 12 * 4; /** The total number of bars for EAN8.*/ private static final int TOTALBARS_EAN8 = 11 + 8 * 4; /** The total number of bars for UPCE.*/ private static final int TOTALBARS_UPCE = 9 + 6 * 4; /** The total number of bars for supplemental 2.*/ private static final int TOTALBARS_SUPP2 = 13; /** The total number of bars for supplemental 5.*/ private static final int TOTALBARS_SUPP5 = 31; /** Marker for odd parity.*/ private static final int ODD = 0; /** Marker for even parity.*/ private static final int EVEN = 1; /** Sequence of parities to be used with EAN13.*/ private static final byte PARITY13[][] = { { ODD, ODD, ODD, ODD, ODD, ODD }, // 0 { ODD, ODD, EVEN, ODD, EVEN, EVEN }, // 1 { ODD, ODD, EVEN, EVEN, ODD, EVEN }, // 2 { ODD, ODD, EVEN, EVEN, EVEN, ODD }, // 3 { ODD, EVEN, ODD, ODD, EVEN, EVEN }, // 4 { ODD, EVEN, EVEN, ODD, ODD, EVEN }, // 5 { ODD, EVEN, EVEN, EVEN, ODD, ODD }, // 6 { ODD, EVEN, ODD, EVEN, ODD, EVEN }, // 7 { ODD, EVEN, ODD, EVEN, EVEN, ODD }, // 8 { ODD, EVEN, EVEN, ODD, EVEN, ODD } // 9 }; /** Sequence of parities to be used with supplemental 2.*/ private static final byte PARITY2[][] = { { ODD, ODD }, // 0 { ODD, EVEN }, // 1 { EVEN, ODD }, // 2 { EVEN, EVEN } // 3 }; /** Sequence of parities to be used with supplemental 2.*/ private static final byte PARITY5[][] = { { EVEN, EVEN, ODD, ODD, ODD }, // 0 { EVEN, ODD, EVEN, ODD, ODD }, // 1 { EVEN, ODD, ODD, EVEN, ODD }, // 2 { EVEN, ODD, ODD, ODD, EVEN }, // 3 { ODD, EVEN, EVEN, ODD, ODD }, // 4 { ODD, ODD, EVEN, EVEN, ODD }, // 5 { ODD, ODD, ODD, EVEN, EVEN }, // 6 { ODD, EVEN, ODD, EVEN, ODD }, // 7 { ODD, EVEN, ODD, ODD, EVEN }, // 8 { ODD, ODD, EVEN, ODD, EVEN } // 9 }; /** Sequence of parities to be used with UPCE.*/ private static final byte PARITYE[][] = { { EVEN, EVEN, EVEN, ODD, ODD, ODD }, // 0 { EVEN, EVEN, ODD, EVEN, ODD, ODD }, // 1 { EVEN, EVEN, ODD, ODD, EVEN, ODD }, // 2 { EVEN, EVEN, ODD, ODD, ODD, EVEN }, // 3 { EVEN, ODD, EVEN, EVEN, ODD, ODD }, // 4 { EVEN, ODD, ODD, EVEN, EVEN, ODD }, // 5 { EVEN, ODD, ODD, ODD, EVEN, EVEN }, // 6 { EVEN, ODD, EVEN, ODD, EVEN, ODD }, // 7 { EVEN, ODD, EVEN, ODD, ODD, EVEN }, // 8 { EVEN, ODD, ODD, EVEN, ODD, EVEN } // 9 }; /** Creates new BarcodeEAN */ public BarcodeEAN() { try { x = 0.8f; font = BaseFont.createFont("Helvetica", "winansi", false); size = 8; baseline = size; barHeight = size * 3; guardBars = true; codeType = EAN13; code = ""; } catch (Exception e) { throw new ExceptionConverter(e); } } /** Calculates the EAN parity character. * @param code the code * @return the parity character */ public static int calculateEANParity(String code) { int mul = 3; int total = 0; for (int k = code.length() - 1; k >= 0; --k) { int n = code.charAt(k) - '0'; total += mul * n; mul ^= 2; } return (10 - (total % 10)) % 10; } /** Converts an UPCA code into an UPCE code. If the code can not * be converted a <CODE>null</CODE> is returned. * @param text the code to convert. It must have 12 numeric characters * @return the 8 converted digits or <CODE>null</CODE> if the * code could not be converted */ static public String convertUPCAtoUPCE(String text) { if (text.length() != 12 || !(text.startsWith("0") || text.startsWith("1"))) return null; if (text.substring(3, 6).equals("000") || text.substring(3, 6).equals("100") || text.substring(3, 6).equals("200")) { if (text.substring(6, 8).equals("00")) return text.substring(0, 1) + text.substring(1, 3) + text.substring(8, 11) + text.substring(3, 4) + text.substring(11); } else if (text.substring(4, 6).equals("00")) { if (text.substring(6, 9).equals("000")) return text.substring(0, 1) + text.substring(1, 4) + text.substring(9, 11) + "3" + text.substring(11); } else if (text.substring(5, 6).equals("0")) { if (text.substring(6, 10).equals("0000")) return text.substring(0, 1) + text.substring(1, 5) + text.substring(10, 11) + "4" + text.substring(11); } else if (text.charAt(10) >= '5') { if (text.substring(6, 10).equals("0000")) return text.substring(0, 1) + text.substring(1, 6) + text.substring(10, 11) + text.substring(11); } return null; } /** Creates the bars for the barcode EAN13 and UPCA. * @param _code the text with 13 digits * @return the barcode */ public static byte[] getBarsEAN13(String _code) { int code[] = new int[_code.length()]; for (int k = 0; k < code.length; ++k) code[k] = _code.charAt(k) - '0'; byte bars[] = new byte[TOTALBARS_EAN13]; int pb = 0; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; byte sequence[] = PARITY13[code[0]]; for (int k = 0; k < sequence.length; ++k) { int c = code[k + 1]; byte stripes[] = BARS[c]; if (sequence[k] == ODD) { bars[pb++] = stripes[0]; bars[pb++] = stripes[1]; bars[pb++] = stripes[2]; bars[pb++] = stripes[3]; } else { bars[pb++] = stripes[3]; bars[pb++] = stripes[2]; bars[pb++] = stripes[1]; bars[pb++] = stripes[0]; } } bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; for (int k = 7; k < 13; ++k) { int c = code[k]; byte stripes[] = BARS[c]; bars[pb++] = stripes[0]; bars[pb++] = stripes[1]; bars[pb++] = stripes[2]; bars[pb++] = stripes[3]; } bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; return bars; } /** Creates the bars for the barcode EAN8. * @param _code the text with 8 digits * @return the barcode */ public static byte[] getBarsEAN8(String _code) { int code[] = new int[_code.length()]; for (int k = 0; k < code.length; ++k) code[k] = _code.charAt(k) - '0'; byte bars[] = new byte[TOTALBARS_EAN8]; int pb = 0; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; for (int k = 0; k < 4; ++k) { int c = code[k]; byte stripes[] = BARS[c]; bars[pb++] = stripes[0]; bars[pb++] = stripes[1]; bars[pb++] = stripes[2]; bars[pb++] = stripes[3]; } bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; for (int k = 4; k < 8; ++k) { int c = code[k]; byte stripes[] = BARS[c]; bars[pb++] = stripes[0]; bars[pb++] = stripes[1]; bars[pb++] = stripes[2]; bars[pb++] = stripes[3]; } bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; return bars; } /** Creates the bars for the barcode UPCE. * @param _code the text with 8 digits * @return the barcode */ public static byte[] getBarsUPCE(String _code) { int code[] = new int[_code.length()]; for (int k = 0; k < code.length; ++k) code[k] = _code.charAt(k) - '0'; byte bars[] = new byte[TOTALBARS_UPCE]; boolean flip = (code[0] != 0); int pb = 0; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; byte sequence[] = PARITYE[code[code.length - 1]]; for (int k = 1; k < code.length - 1; ++k) { int c = code[k]; byte stripes[] = BARS[c]; if (sequence[k - 1] == (flip ? EVEN : ODD)) { bars[pb++] = stripes[0]; bars[pb++] = stripes[1]; bars[pb++] = stripes[2]; bars[pb++] = stripes[3]; } else { bars[pb++] = stripes[3]; bars[pb++] = stripes[2]; bars[pb++] = stripes[1]; bars[pb++] = stripes[0]; } } bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 1; return bars; } /** Creates the bars for the barcode supplemental 2. * @param _code the text with 2 digits * @return the barcode */ public static byte[] getBarsSupplemental2(String _code) { int code[] = new int[2]; for (int k = 0; k < code.length; ++k) code[k] = _code.charAt(k) - '0'; byte bars[] = new byte[TOTALBARS_SUPP2]; int pb = 0; int parity = (code[0] * 10 + code[1]) % 4; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 2; byte sequence[] = PARITY2[parity]; for (int k = 0; k < sequence.length; ++k) { if (k == 1) { bars[pb++] = 1; bars[pb++] = 1; } int c = code[k]; byte stripes[] = BARS[c]; if (sequence[k] == ODD) { bars[pb++] = stripes[0]; bars[pb++] = stripes[1]; bars[pb++] = stripes[2]; bars[pb++] = stripes[3]; } else { bars[pb++] = stripes[3]; bars[pb++] = stripes[2]; bars[pb++] = stripes[1]; bars[pb++] = stripes[0]; } } return bars; } /** Creates the bars for the barcode supplemental 5. * @param _code the text with 5 digits * @return the barcode */ public static byte[] getBarsSupplemental5(String _code) { int code[] = new int[5]; for (int k = 0; k < code.length; ++k) code[k] = _code.charAt(k) - '0'; byte bars[] = new byte[TOTALBARS_SUPP5]; int pb = 0; int parity = (((code[0] + code[2] + code[4]) * 3) + ((code[1] + code[3]) * 9)) % 10; bars[pb++] = 1; bars[pb++] = 1; bars[pb++] = 2; byte sequence[] = PARITY5[parity]; for (int k = 0; k < sequence.length; ++k) { if (k != 0) { bars[pb++] = 1; bars[pb++] = 1; } int c = code[k]; byte stripes[] = BARS[c]; if (sequence[k] == ODD) { bars[pb++] = stripes[0]; bars[pb++] = stripes[1]; bars[pb++] = stripes[2]; bars[pb++] = stripes[3]; } else { bars[pb++] = stripes[3]; bars[pb++] = stripes[2]; bars[pb++] = stripes[1]; bars[pb++] = stripes[0]; } } return bars; } /** Gets the maximum area that the barcode and the text, if * any, will occupy. The lower left corner is always (0, 0). * @return the size the barcode occupies. */ public Rectangle getBarcodeSize() { float width = 0; float height = barHeight; if (font != null) { if (baseline <= 0) height += -baseline + size; else height += baseline - font.getFontDescriptor(BaseFont.DESCENT, size); } switch (codeType) { case EAN13: width = x * (11 + 12 * 7); if (font != null) { width += font.getWidthPoint(code.charAt(0), size); } break; case EAN8: width = x * (11 + 8 * 7); break; case UPCA: width = x * (11 + 12 * 7); if (font != null) { width += font.getWidthPoint(code.charAt(0), size) + font.getWidthPoint(code.charAt(11), size); } break; case UPCE: width = x * (9 + 6 * 7); if (font != null) { width += font.getWidthPoint(code.charAt(0), size) + font.getWidthPoint(code.charAt(7), size); } break; case SUPP2: width = x * (6 + 2 * 7); break; case SUPP5: width = x * (4 + 5 * 7 + 4 * 2); break; default: throw new RuntimeException("Invalid code type."); } return new Rectangle(width, height); } /** Places the barcode in a <CODE>PdfContentByte</CODE>. The * barcode is always placed at coordinates (0, 0). Use the * translation matrix to move it elsewhere.<p> * The bars and text are written in the following colors:<p> * <P><TABLE BORDER=1> * <TR> * <TH><P><CODE>barColor</CODE></TH> * <TH><P><CODE>textColor</CODE></TH> * <TH><P>Result</TH> * </TR> * <TR> * <TD><P><CODE>null</CODE></TD> * <TD><P><CODE>null</CODE></TD> * <TD><P>bars and text painted with current fill color</TD> * </TR> * <TR> * <TD><P><CODE>barColor</CODE></TD> * <TD><P><CODE>null</CODE></TD> * <TD><P>bars and text painted with <CODE>barColor</CODE></TD> * </TR> * <TR> * <TD><P><CODE>null</CODE></TD> * <TD><P><CODE>textColor</CODE></TD> * <TD><P>bars painted with current color<br>text painted with <CODE>textColor</CODE></TD> * </TR> * <TR> * <TD><P><CODE>barColor</CODE></TD> * <TD><P><CODE>textColor</CODE></TD> * <TD><P>bars painted with <CODE>barColor</CODE><br>text painted with <CODE>textColor</CODE></TD> * </TR> * </TABLE> * @param cb the <CODE>PdfContentByte</CODE> where the barcode will be placed * @param barColor the color of the bars. It can be <CODE>null</CODE> * @param textColor the color of the text. It can be <CODE>null</CODE> * @return the dimensions the barcode occupies */ public Rectangle placeBarcode(PdfContentByte cb, Color barColor, Color textColor) { Rectangle rect = getBarcodeSize(); float barStartX = 0; float barStartY = 0; float textStartY = 0; if (font != null) { if (baseline <= 0) textStartY = barHeight - baseline; else { textStartY = -font.getFontDescriptor(BaseFont.DESCENT, size); barStartY = textStartY + baseline; } } switch (codeType) { case EAN13: case UPCA: case UPCE: if (font != null) barStartX += font.getWidthPoint(code.charAt(0), size); break; } byte bars[] = null; int guard[] = GUARD_EMPTY; switch (codeType) { case EAN13: bars = getBarsEAN13(code); guard = GUARD_EAN13; break; case EAN8: bars = getBarsEAN8(code); guard = GUARD_EAN8; break; case UPCA: bars = getBarsEAN13("0" + code); guard = GUARD_UPCA; break; case UPCE: bars = getBarsUPCE(code); guard = GUARD_UPCE; break; case SUPP2: bars = getBarsSupplemental2(code); break; case SUPP5: bars = getBarsSupplemental5(code); break; } float keepBarX = barStartX; boolean print = true; float gd = 0; if (font != null && baseline > 0 && guardBars) { gd = baseline / 2; } if (barColor != null) cb.setColorFill(barColor); for (int k = 0; k < bars.length; ++k) { float w = bars[k] * x; if (print) { if (Arrays.binarySearch(guard, k) >= 0) cb.rectangle(barStartX, barStartY - gd, w - inkSpreading, barHeight + gd); else cb.rectangle(barStartX, barStartY, w - inkSpreading, barHeight); } print = !print; barStartX += w; } cb.fill(); if (font != null) { if (textColor != null) cb.setColorFill(textColor); cb.beginText(); cb.setFontAndSize(font, size); switch (codeType) { case EAN13: cb.setTextMatrix(0, textStartY); cb.showText(code.substring(0, 1)); for (int k = 1; k < 13; ++k) { String c = code.substring(k, k + 1); float len = font.getWidthPoint(c, size); float pX = keepBarX + TEXTPOS_EAN13[k - 1] * x - len / 2; cb.setTextMatrix(pX, textStartY); cb.showText(c); } break; case EAN8: for (int k = 0; k < 8; ++k) { String c = code.substring(k, k + 1); float len = font.getWidthPoint(c, size); float pX = TEXTPOS_EAN8[k] * x - len / 2; cb.setTextMatrix(pX, textStartY); cb.showText(c); } break; case UPCA: cb.setTextMatrix(0, textStartY); cb.showText(code.substring(0, 1)); for (int k = 1; k < 11; ++k) { String c = code.substring(k, k + 1); float len = font.getWidthPoint(c, size); float pX = keepBarX + TEXTPOS_EAN13[k] * x - len / 2; cb.setTextMatrix(pX, textStartY); cb.showText(c); } cb.setTextMatrix(keepBarX + x * (11 + 12 * 7), textStartY); cb.showText(code.substring(11, 12)); break; case UPCE: cb.setTextMatrix(0, textStartY); cb.showText(code.substring(0, 1)); for (int k = 1; k < 7; ++k) { String c = code.substring(k, k + 1); float len = font.getWidthPoint(c, size); float pX = keepBarX + TEXTPOS_EAN13[k - 1] * x - len / 2; cb.setTextMatrix(pX, textStartY); cb.showText(c); } cb.setTextMatrix(keepBarX + x * (9 + 6 * 7), textStartY); cb.showText(code.substring(7, 8)); break; case SUPP2: case SUPP5: for (int k = 0; k < code.length(); ++k) { String c = code.substring(k, k + 1); float len = font.getWidthPoint(c, size); float pX = (7.5f + (9 * k)) * x - len / 2; cb.setTextMatrix(pX, textStartY); cb.showText(c); } break; } cb.endText(); } return rect; } /** Creates a <CODE>java.awt.Image</CODE>. This image only * contains the bars without any text. * @param foreground the color of the bars * @param background the color of the background * @return the image */ public java.awt.Image createAwtImage(Color foreground, Color background) { int f = foreground.getRGB(); int g = background.getRGB(); Canvas canvas = new Canvas(); int width = 0; byte bars[] = null; switch (codeType) { case EAN13: bars = getBarsEAN13(code); width = 11 + 12 * 7; break; case EAN8: bars = getBarsEAN8(code); width = 11 + 8 * 7; break; case UPCA: bars = getBarsEAN13("0" + code); width = 11 + 12 * 7; break; case UPCE: bars = getBarsUPCE(code); width = 9 + 6 * 7; break; case SUPP2: bars = getBarsSupplemental2(code); width = 6 + 2 * 7; break; case SUPP5: bars = getBarsSupplemental5(code); width = 4 + 5 * 7 + 4 * 2; break; default: throw new RuntimeException("Invalid code type."); } boolean print = true; int ptr = 0; int height = (int) barHeight; int pix[] = new int[width * height]; for (int k = 0; k < bars.length; ++k) { int w = bars[k]; int c = g; if (print) c = f; print = !print; for (int j = 0; j < w; ++j) pix[ptr++] = c; } for (int k = width; k < pix.length; k += width) { System.arraycopy(pix, 0, pix, k, width); } Image img = canvas.createImage(new MemoryImageSource(width, height, pix, 0, width)); return img; } }