*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 (psoares@consiste.pt) */ public class BarcodePostnet extends Barcode{ /** The bars for each character. */ static 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 coodinates (0, 0). Use the
* translation matrix to move it elsewhere.* The bars and text are written in the following colors:
*
|
*
|
* Result |
*
|---|---|---|
|
*
|
* bars and text painted with current fill color |
*
|
*
|
* bars and text painted with |
*
|
*
|
* bars painted with current color |
*
|
*
|
* bars painted with |
*
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, Color barColor, Color 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();
}
/** 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(Color foreground, Color background) {
int f = foreground.getRGB();
int g = background.getRGB();
Canvas canvas = new 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);
Image img = canvas.createImage(new MemoryImageSource(width, barTall, pix, 0, width));
return img;
}
}