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49 package com.lowagie.text.pdf;
50
51 import java.awt.Canvas  ;
52 import java.awt.Color ;
53 import java.awt.Image ;
54 import java.awt.image.MemoryImageSource ;
55
56 import com.lowagie.text.Element;
57 import com.lowagie.text.ExceptionConverter;
58 import com.lowagie.text.Rectangle;
59
60
77 public class BarcodeInter25 extends Barcode{
78
79
81 private static final byte BARS[][] =
82 {
83 {0,0,1,1,0},
84 {1,0,0,0,1},
85 {0,1,0,0,1},
86 {1,1,0,0,0},
87 {0,0,1,0,1},
88 {1,0,1,0,0},
89 {0,1,1,0,0},
90 {0,0,0,1,1},
91 {1,0,0,1,0},
92 {0,1,0,1,0}
93 };
94
95
96 public BarcodeInter25() {
97 try {
98 x = 0.8f;
99 n = 2;
100 font = BaseFont.createFont("Helvetica", "winansi", false);
101 size = 8;
102 baseline = size;
103 barHeight = size * 3;
104 textAlignment = Element.ALIGN_CENTER;
105 generateChecksum = false;
106 checksumText = false;
107 }
108 catch (Exception e) {
109 throw new ExceptionConverter(e);
110 }
111 }
112
113
117 public static String keepNumbers(String text) {
118 StringBuffer sb = new StringBuffer ();
119 for (int k = 0; k < text.length(); ++k) {
120 char c = text.charAt(k);
121 if (c >= '0' && c <= '9')
122 sb.append(c);
123 }
124 return sb.toString();
125 }
126
127
131 public static char getChecksum(String text) {
132 int mul = 3;
133 int total = 0;
134 for (int k = text.length() - 1; k >= 0; --k) {
135 int n = text.charAt(k) - '0';
136 total += mul * n;
137 mul ^= 2;
138 }
139 return (char)(((10 - (total % 10)) % 10) + '0');
140 }
141
142
146 public static byte[] getBarsInter25(String text) {
147 text = keepNumbers(text);
148 if ((text.length() & 1) != 0)
149 throw new IllegalArgumentException ("The text length must be even.");
150 byte bars[] = new byte[text.length() * 5 + 7];
151 int pb = 0;
152 bars[pb++] = 0;
153 bars[pb++] = 0;
154 bars[pb++] = 0;
155 bars[pb++] = 0;
156 int len = text.length() / 2;
157 for (int k = 0; k < len; ++k) {
158 int c1 = text.charAt(k * 2) - '0';
159 int c2 = text.charAt(k * 2 + 1) - '0';
160 byte b1[] = BARS[c1];
161 byte b2[] = BARS[c2];
162 for (int j = 0; j < 5; ++j) {
163 bars[pb++] = b1[j];
164 bars[pb++] = b2[j];
165 }
166 }
167 bars[pb++] = 1;
168 bars[pb++] = 0;
169 bars[pb++] = 0;
170 return bars;
171 }
172
173
177 public Rectangle getBarcodeSize() {
178 float fontX = 0;
179 float fontY = 0;
180 if (font != null) {
181 if (baseline > 0)
182 fontY = baseline - font.getFontDescriptor(BaseFont.DESCENT, size);
183 else
184 fontY = -baseline + size;
185 String fullCode = code;
186 if (generateChecksum && checksumText)
187 fullCode += getChecksum(fullCode);
188 fontX = font.getWidthPoint(altText != null ? altText : fullCode, size);
189 }
190 String fullCode = keepNumbers(code);
191 int len = fullCode.length();
192 if (generateChecksum)
193 ++len;
194 float fullWidth = len * (3 * x + 2 * x * n) + (6 + n ) * x;
195 fullWidth = Math.max(fullWidth, fontX);
196 float fullHeight = barHeight + fontY;
197 return new Rectangle(fullWidth, fullHeight);
198 }
199
200
236 public Rectangle placeBarcode(PdfContentByte cb, Color barColor, Color textColor) {
237 String fullCode = code;
238 float fontX = 0;
239 if (font != null) {
240 if (generateChecksum && checksumText)
241 fullCode += getChecksum(fullCode);
242 fontX = font.getWidthPoint(fullCode = altText != null ? altText : fullCode, size);
243 }
244 String bCode = keepNumbers(code);
245 if (generateChecksum)
246 bCode += getChecksum(bCode);
247 int len = bCode.length();
248 float fullWidth = len * (3 * x + 2 * x * n) + (6 + n ) * x;
249 float barStartX = 0;
250 float textStartX = 0;
251 switch (textAlignment) {
252 case Element.ALIGN_LEFT:
253 break;
254 case Element.ALIGN_RIGHT:
255 if (fontX > fullWidth)
256 barStartX = fontX - fullWidth;
257 else
258 textStartX = fullWidth - fontX;
259 break;
260 default:
261 if (fontX > fullWidth)
262 barStartX = (fontX - fullWidth) / 2;
263 else
264 textStartX = (fullWidth - fontX) / 2;
265 break;
266 }
267 float barStartY = 0;
268 float textStartY = 0;
269 if (font != null) {
270 if (baseline <= 0)
271 textStartY = barHeight - baseline;
272 else {
273 textStartY = -font.getFontDescriptor(BaseFont.DESCENT, size);
274 barStartY = textStartY + baseline;
275 }
276 }
277 byte bars[] = getBarsInter25(bCode);
278 boolean print = true;
279 if (barColor != null)
280 cb.setColorFill(barColor);
281 for (int k = 0; k < bars.length; ++k) {
282 float w = (bars[k] == 0 ? x : x * n);
283 if (print)
284 cb.rectangle(barStartX, barStartY, w - inkSpreading, barHeight);
285 print = !print;
286 barStartX += w;
287 }
288 cb.fill();
289 if (font != null) {
290 if (textColor != null)
291 cb.setColorFill(textColor);
292 cb.beginText();
293 cb.setFontAndSize(font, size);
294 cb.setTextMatrix(textStartX, textStartY);
295 cb.showText(fullCode);
296 cb.endText();
297 }
298 return getBarcodeSize();
299 }
300
301
307 public java.awt.Image createAwtImage(Color foreground, Color background) {
308 int f = foreground.getRGB();
309 int g = background.getRGB();
310 Canvas canvas = new Canvas ();
311
312 String bCode = keepNumbers(code);
313 if (generateChecksum)
314 bCode += getChecksum(bCode);
315 int len = bCode.length();
316 int nn = (int)n;
317 int fullWidth = len * (3 + 2 * nn) + (6 + nn );
318 byte bars[] = getBarsInter25(bCode);
319 boolean print = true;
320 int ptr = 0;
321 int height = (int)barHeight;
322 int pix[] = new int[fullWidth * height];
323 for (int k = 0; k < bars.length; ++k) {
324 int w = (bars[k] == 0 ? 1 : nn);
325 int c = g;
326 if (print)
327 c = f;
328 print = !print;
329 for (int j = 0; j < w; ++j)
330 pix[ptr++] = c;
331 }
332 for (int k = fullWidth; k < pix.length; k += fullWidth) {
333 System.arraycopy(pix, 0, pix, k, fullWidth);
334 }
335 Image img = canvas.createImage(new MemoryImageSource (fullWidth, height, pix, 0, fullWidth));
336
337 return img;
338 }
339 } |
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