com.itextpdf.text.pdf.BarcodePostnet Maven / Gradle / Ivy
/*
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2016 iText Group NV
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
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* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
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package com.itextpdf.text.pdf;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.BaseColor;
/** Implements the Postnet and Planet barcodes. The default parameters are:
*
*n = 72f / 22f; // distance between bars
*x = 0.02f * 72f; // bar width
*barHeight = 0.125f * 72f; // height of the tall bars
*size = 0.05f * 72f; // height of the short bars
*codeType = POSTNET; // type of code
*
*
* @author Paulo Soares
*/
public class BarcodePostnet extends Barcode{
/** The bars for each character.
*/
private static final byte BARS[][] =
{
{1,1,0,0,0},
{0,0,0,1,1},
{0,0,1,0,1},
{0,0,1,1,0},
{0,1,0,0,1},
{0,1,0,1,0},
{0,1,1,0,0},
{1,0,0,0,1},
{1,0,0,1,0},
{1,0,1,0,0}
};
/** Creates new BarcodePostnet */
public BarcodePostnet() {
n = 72f / 22f; // distance between bars
x = 0.02f * 72f; // bar width
barHeight = 0.125f * 72f; // height of the tall bars
size = 0.05f * 72f; // height of the short bars
codeType = POSTNET; // type of code
}
/** Creates the bars for Postnet.
* @param text the code to be created without checksum
* @return the bars
*/
public static byte[] getBarsPostnet(String text) {
int total = 0;
for (int k = text.length() - 1; k >= 0; --k) {
int n = text.charAt(k) - '0';
total += n;
}
text += (char)(((10 - (total % 10)) % 10) + '0');
byte bars[] = new byte[text.length() * 5 + 2];
bars[0] = 1;
bars[bars.length - 1] = 1;
for (int k = 0; k < text.length(); ++k) {
int c = text.charAt(k) - '0';
System.arraycopy(BARS[c], 0, bars, k * 5 + 1, 5);
}
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 = ((code.length() + 1) * 5 + 1) * n + x;
return new Rectangle(width, barHeight);
}
/** Places the barcode in a PdfContentByte. The
* barcode is always placed at coordinates (0, 0). Use the
* translation matrix to move it elsewhere.
* The bars and text are written in the following colors:
*
*
* barColor
textColor
Result
*
* null
null
bars and text painted with current fill color
*
* barColor
null
bars and text painted with barColor
*
* null
textColor
bars painted with current color
text painted with textColor
*
* barColor
textColor
bars painted with barColor
text painted with textColor
*
* @param cb the PdfContentByte where the barcode will be placed
* @param barColor the color of the bars. It can be null
* @param textColor the color of the text. It can be null
* @return the dimensions the barcode occupies
*/
public Rectangle placeBarcode(PdfContentByte cb, BaseColor barColor, BaseColor textColor) {
if (barColor != null)
cb.setColorFill(barColor);
byte bars[] = getBarsPostnet(code);
byte flip = 1;
if (codeType == PLANET) {
flip = 0;
bars[0] = 0;
bars[bars.length - 1] = 0;
}
float startX = 0;
for (int k = 0; k < bars.length; ++k) {
cb.rectangle(startX, 0, x - inkSpreading, bars[k] == flip ? barHeight : size);
startX += n;
}
cb.fill();
return getBarcodeSize();
}
// AWT related methods (remove this if you port to Android / GAE)
/** Creates a java.awt.Image. 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(java.awt.Color foreground, java.awt.Color background) {
int f = foreground.getRGB();
int g = background.getRGB();
java.awt.Canvas canvas = new java.awt.Canvas();
int barWidth = (int)x;
if (barWidth <= 0)
barWidth = 1;
int barDistance = (int)n;
if (barDistance <= barWidth)
barDistance = barWidth + 1;
int barShort = (int)size;
if (barShort <= 0)
barShort = 1;
int barTall = (int)barHeight;
if (barTall <= barShort)
barTall = barShort + 1;
int width = ((code.length() + 1) * 5 + 1) * barDistance + barWidth;
int pix[] = new int[width * barTall];
byte bars[] = getBarsPostnet(code);
byte flip = 1;
if (codeType == PLANET) {
flip = 0;
bars[0] = 0;
bars[bars.length - 1] = 0;
}
int idx = 0;
for (int k = 0; k < bars.length; ++k) {
boolean dot = (bars[k] == flip);
for (int j = 0; j < barDistance; ++j) {
pix[idx + j] = ((dot && j < barWidth) ? f : g);
}
idx += barDistance;
}
int limit = width * (barTall - barShort);
for (int k = width; k < limit; k += width)
System.arraycopy(pix, 0, pix, k, width);
idx = limit;
for (int k = 0; k < bars.length; ++k) {
for (int j = 0; j < barDistance; ++j) {
pix[idx + j] = ((j < barWidth) ? f : g);
}
idx += barDistance;
}
for (int k = limit + width; k < pix.length; k += width)
System.arraycopy(pix, limit, pix, k, width);
java.awt.Image img = canvas.createImage(new java.awt.image.MemoryImageSource(width, barTall, pix, 0, width));
return img;
}
}