*x = 0.8f;
*n = 2;
*font = BaseFont.CreateFont("Helvetica", "winansi", false);
*size = 8;
*baseline = size;
*barHeight = size * 3;
*textint= Element.ALIGN_CENTER;
*generateChecksum = false;
*checksumText = false;
*startStopText = true;
*extended = false;
*
*
* @author Paulo Soares (psoares@consiste.pt)
*/
public class Barcode39 : Barcode {
/** The bars to generate the code.
*/
private static readonly byte[][] BARS =
{
new byte[] {0,0,0,1,1,0,1,0,0},
new byte[] {1,0,0,1,0,0,0,0,1},
new byte[] {0,0,1,1,0,0,0,0,1},
new byte[] {1,0,1,1,0,0,0,0,0},
new byte[] {0,0,0,1,1,0,0,0,1},
new byte[] {1,0,0,1,1,0,0,0,0},
new byte[] {0,0,1,1,1,0,0,0,0},
new byte[] {0,0,0,1,0,0,1,0,1},
new byte[] {1,0,0,1,0,0,1,0,0},
new byte[] {0,0,1,1,0,0,1,0,0},
new byte[] {1,0,0,0,0,1,0,0,1},
new byte[] {0,0,1,0,0,1,0,0,1},
new byte[] {1,0,1,0,0,1,0,0,0},
new byte[] {0,0,0,0,1,1,0,0,1},
new byte[] {1,0,0,0,1,1,0,0,0},
new byte[] {0,0,1,0,1,1,0,0,0},
new byte[] {0,0,0,0,0,1,1,0,1},
new byte[] {1,0,0,0,0,1,1,0,0},
new byte[] {0,0,1,0,0,1,1,0,0},
new byte[] {0,0,0,0,1,1,1,0,0},
new byte[] {1,0,0,0,0,0,0,1,1},
new byte[] {0,0,1,0,0,0,0,1,1},
new byte[] {1,0,1,0,0,0,0,1,0},
new byte[] {0,0,0,0,1,0,0,1,1},
new byte[] {1,0,0,0,1,0,0,1,0},
new byte[] {0,0,1,0,1,0,0,1,0},
new byte[] {0,0,0,0,0,0,1,1,1},
new byte[] {1,0,0,0,0,0,1,1,0},
new byte[] {0,0,1,0,0,0,1,1,0},
new byte[] {0,0,0,0,1,0,1,1,0},
new byte[] {1,1,0,0,0,0,0,0,1},
new byte[] {0,1,1,0,0,0,0,0,1},
new byte[] {1,1,1,0,0,0,0,0,0},
new byte[] {0,1,0,0,1,0,0,0,1},
new byte[] {1,1,0,0,1,0,0,0,0},
new byte[] {0,1,1,0,1,0,0,0,0},
new byte[] {0,1,0,0,0,0,1,0,1},
new byte[] {1,1,0,0,0,0,1,0,0},
new byte[] {0,1,1,0,0,0,1,0,0},
new byte[] {0,1,0,1,0,1,0,0,0},
new byte[] {0,1,0,1,0,0,0,1,0},
new byte[] {0,1,0,0,0,1,0,1,0},
new byte[] {0,0,0,1,0,1,0,1,0},
new byte[] {0,1,0,0,1,0,1,0,0}
};
/** The index chars to BARS.
*/
private const string CHARS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*";
/** The character combinations to make the code 39 extended.
*/
private const string EXTENDED = "%U" +
"$A$B$C$D$E$F$G$H$I$J$K$L$M$N$O$P$Q$R$S$T$U$V$W$X$Y$Z" +
"%A%B%C%D%E /A/B/C/D/E/F/G/H/I/J/K/L - ./O" +
" 0 1 2 3 4 5 6 7 8 9/Z%F%G%H%I%J%V" +
" A B C D E F G H I J K L M N O P Q R S T U V W X Y Z" +
"%K%L%M%N%O%W" +
"+A+B+C+D+E+F+G+H+I+J+K+L+M+N+O+P+Q+R+S+T+U+V+W+X+Y+Z" +
"%P%Q%R%S%T";
/** Creates a new Barcode39.
*/
public Barcode39() {
x = 0.8f;
n = 2;
font = BaseFont.CreateFont("Helvetica", "winansi", false);
size = 8;
baseline = size;
barHeight = size * 3;
textAlignment = Element.ALIGN_CENTER;
generateChecksum = false;
checksumText = false;
startStopText = true;
extended = false;
}
/** Creates the bars.
* @param text the text to create the bars. This text does not include the start and
* stop characters
* @return the bars
*/
public static byte[] GetBarsCode39(string text) {
text = "*" + text + "*";
byte[] bars = new byte[text.Length * 10 - 1];
for (int k = 0; k < text.Length; ++k) {
int idx = CHARS.IndexOf(text[k]);
if (idx < 0)
throw new ArgumentException("The character '" + text[k] + "' is illegal in code 39.");
Array.Copy(BARS[idx], 0, bars, k * 10, 9);
}
return bars;
}
/** Converts the extended text into a normal, escaped text,
* ready to generate bars.
* @param text the extended text
* @return the escaped text
*/
public static string GetCode39Ex(string text) {
string ret = "";
for (int k = 0; k < text.Length; ++k) {
char c = text[k];
if (c > 127)
throw new ArgumentException("The character '" + c + "' is illegal in code 39 extended.");
char c1 = EXTENDED[c * 2];
char c2 = EXTENDED[c * 2 + 1];
if (c1 != ' ')
ret += c1;
ret += c2;
}
return ret;
}
/** Calculates the checksum.
* @param text the text
* @return the checksum
*/
internal static char GetChecksum(string text) {
int chk = 0;
for (int k = 0; k < text.Length; ++k) {
int idx = CHARS.IndexOf(text[k]);
if (idx < 0)
throw new ArgumentException("The character '" + text[k] + "' is illegal in code 39.");
chk += idx;
}
return CHARS[chk % 43];
}
/** 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 fontX = 0;
float fontY = 0;
string fCode = code;
if (extended)
fCode = GetCode39Ex(code);
if (font != null) {
if (baseline > 0)
fontY = baseline - font.GetFontDescriptor(BaseFont.DESCENT, size);
else
fontY = -baseline + size;
string fullCode = code;
if (generateChecksum && checksumText)
fullCode += GetChecksum(fCode);
if (startStopText)
fullCode = "*" + fullCode + "*";
fontX = font.GetWidthPoint(altText != null ? altText : fullCode, size);
}
int len = fCode.Length + 2;
if (generateChecksum)
++len;
float fullWidth = len * (6 * x + 3 * x * n) + (len - 1) * x;
fullWidth = Math.Max(fullWidth, fontX);
float fullHeight = barHeight + fontY;
return new Rectangle(fullWidth, fullHeight);
}
}
/** 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) {
string fullCode = code;
float fontX = 0;
string bCode = code;
if (extended)
bCode = GetCode39Ex(code);
if (font != null) {
if (generateChecksum && checksumText)
fullCode += GetChecksum(bCode);
if (startStopText)
fullCode = "*" + fullCode + "*";
fontX = font.GetWidthPoint(fullCode = altText != null ? altText : fullCode, size);
}
if (generateChecksum)
bCode += GetChecksum(bCode);
int len = bCode.Length + 2;
float fullWidth = len * (6 * x + 3 * x * n) + (len - 1) * x;
float barStartX = 0;
float textStartX = 0;
switch (textAlignment) {
case Element.ALIGN_LEFT:
break;
case Element.ALIGN_RIGHT:
if (fontX > fullWidth)
barStartX = fontX - fullWidth;
else
textStartX = fullWidth - fontX;
break;
default:
if (fontX > fullWidth)
barStartX = (fontX - fullWidth) / 2;
else
textStartX = (fullWidth - fontX) / 2;
break;
}
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;
}
}
byte[] bars = GetBarsCode39(bCode);
bool print = true;
if (barColor != null)
cb.SetColorFill(barColor);
for (int k = 0; k < bars.Length; ++k) {
float w = (bars[k] == 0 ? x : x * n);
if (print)
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);
cb.SetTextMatrix(textStartX, textStartY);
cb.ShowText(fullCode);
cb.EndText();
}
return this.BarcodeSize;
}
public override System.Drawing.Image CreateDrawingImage(System.Drawing.Color foreground, System.Drawing.Color background) {
String bCode = code;
if (extended)
bCode = GetCode39Ex(code);
if (generateChecksum)
bCode += GetChecksum(bCode);
int len = bCode.Length + 2;
int nn = (int)n;
int fullWidth = len * (6 + 3 * nn) + (len - 1);
int height = (int)barHeight;
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(fullWidth, height);
byte[] bars = GetBarsCode39(bCode);
for (int h = 0; h < height; ++h) {
bool print = true;
int ptr = 0;
for (int k = 0; k < bars.Length; ++k) {
int w = (bars[k] == 0 ? 1 : nn);
System.Drawing.Color c = background;
if (print)
c = foreground;
print = !print;
for (int j = 0; j < w; ++j)
bmp.SetPixel(ptr++, h, c);
}
}
return bmp;
}
}
}