*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 : Barcode{
/** The bars for each character.
*/
private static readonly byte[][] BARS = {
new byte[] {1,1,0,0,0},
new byte[] {0,0,0,1,1},
new byte[] {0,0,1,0,1},
new byte[] {0,0,1,1,0},
new byte[] {0,1,0,0,1},
new byte[] {0,1,0,1,0},
new byte[] {0,1,1,0,0},
new byte[] {1,0,0,0,1},
new byte[] {1,0,0,1,0},
new byte[] {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[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[k] - '0';
Array.Copy(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 override Rectangle BarcodeSize {
get {
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 override 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 this.BarcodeSize;
}
public override System.Drawing.Image CreateDrawingImage(System.Drawing.Color foreground, System.Drawing.Color background) {
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;
byte[] bars = GetBarsPostnet(code);
int width = bars.Length * barDistance;
byte flip = 1;
if (codeType == PLANET) {
flip = 0;
bars[0] = 0;
bars[bars.Length - 1] = 0;
}
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(width, barTall);
int seg1 = barTall - barShort;
for (int i = 0; i < seg1; ++i) {
int idx = 0;
for (int k = 0; k < bars.Length; ++k) {
bool dot = (bars[k] == flip);
for (int j = 0; j < barDistance; ++j) {
bmp.SetPixel(idx++, i, (dot && j < barWidth) ? foreground : background);
}
}
}
for (int i = seg1; i < barTall; ++i) {
int idx = 0;
for (int k = 0; k < bars.Length; ++k) {
for (int j = 0; j < barDistance; ++j) {
bmp.SetPixel(idx++, i, (j < barWidth) ? foreground : background);
}
}
}
return bmp;
}
}
}