KReport

code128.cpp
1/* This file is part of the KDE project
2 * Copyright (C) 2001-2007 by OpenMFG, LLC (info@openmfg.com)
3 * Copyright (C) 2007-2008 by Adam Pigg (adam@piggz.co.uk)
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19/*
20 * This file contains the implementation of the Code 128 barcode renderer.
21 * All this code assumes a 100dpi rendering surface for it's calculations.
22 */
23
24#include <QString>
25#include <QVector>
26#include <QRect>
27#include <QPen>
28#include <QBrush>
29
30#include "KReportRenderObjects.h"
31#include "kreportplugin_debug.h"
32
33static const int SETA = 0;
34static const int SETB = 1;
35static const int SETC = 2;
36
37static const char FNC1 = (char)130;
38static const char FNC2 = (char)131;
39static const char FNC3 = (char)132;
40static const char FNC4 = (char)133;
41static const char SHIFT = (char)134;
42static const char CODEA = (char)135;
43static const char CODEB = (char)136;
44static const char CODEC = (char)137;
45static const char STARTA = (char)138;
46static const char STARTB = (char)139;
47static const char STARTC = (char)140;
48
49
50struct code128 {
51 char codea;
52 char codeb;
53 char codec;
54
55 int values[6];
56
57 bool _null;
58};
59
60static const struct code128 _128codes[] = {
61 // A , B , C , { B S B S B S }, NULL? },
62 { ' ', ' ', 0, { 2, 1, 2, 2, 2, 2 }, false },
63 { '!', '!', 1, { 2, 2, 2, 1, 2, 2 }, false },
64 { '"', '"', 2, { 2, 2, 2, 2, 2, 1 }, false },
65 { '#', '#', 3, { 1, 2, 1, 2, 2, 3 }, false },
66 { '$', '$', 4, { 1, 2, 1, 3, 2, 2 }, false },
67 { '%', '%', 5, { 1, 3, 1, 2, 2, 2 }, false },
68 { '&', '&', 6, { 1, 2, 2, 2, 1, 3 }, false },
69 { '\'', '\'', 7, { 1, 2, 2, 3, 1, 2 }, false },
70 { '(', '(', 8, { 1, 3, 2, 2, 1, 2 }, false },
71 { ')', ')', 9, { 2, 2, 1, 2, 1, 3 }, false },
72 { '*', '*', 10, { 2, 2, 1, 3, 1, 2 }, false },
73 { '+', '+', 11, { 2, 3, 1, 2, 1, 2 }, false },
74 { ',', ',', 12, { 1, 1, 2, 2, 3, 2 }, false },
75 { '-', '-', 13, { 1, 2, 2, 1, 3, 2 }, false },
76 { '.', '.', 14, { 1, 2, 2, 2, 3, 1 }, false },
77 { '/', '/', 15, { 1, 1, 3, 2, 2, 2 }, false },
78 { '0', '0', 16, { 1, 2, 3, 1, 2, 2 }, false },
79 { '1', '1', 17, { 1, 2, 3, 2, 2, 1 }, false },
80 { '2', '2', 18, { 2, 2, 3, 2, 1, 1 }, false },
81 { '3', '3', 19, { 2, 2, 1, 1, 3, 2 }, false },
82 { '4', '4', 20, { 2, 2, 1, 2, 3, 1 }, false },
83 { '5', '5', 21, { 2, 1, 3, 2, 1, 2 }, false },
84 { '6', '6', 22, { 2, 2, 3, 1, 1, 2 }, false },
85 { '7', '7', 23, { 3, 1, 2, 1, 3, 1 }, false },
86 { '8', '8', 24, { 3, 1, 1, 2, 2, 2 }, false },
87 { '9', '9', 25, { 3, 2, 1, 1, 2, 2 }, false },
88 { ':', ':', 26, { 3, 2, 1, 2, 2, 1 }, false },
89 { ';', ';', 27, { 3, 1, 2, 2, 1, 2 }, false },
90 { '<', '<', 28, { 3, 2, 2, 1, 1, 2 }, false },
91 { '=', '=', 29, { 3, 2, 2, 2, 1, 1 }, false },
92 { '>', '>', 30, { 2, 1, 2, 1, 2, 3 }, false },
93 { '?', '?', 31, { 2, 1, 2, 3, 2, 1 }, false },
94 { '@', '@', 32, { 2, 3, 2, 1, 2, 1 }, false },
95 { 'A', 'A', 33, { 1, 1, 1, 3, 2, 3 }, false },
96 { 'B', 'B', 34, { 1, 3, 1, 1, 2, 3 }, false },
97 { 'C', 'C', 35, { 1, 3, 1, 3, 2, 1 }, false },
98 { 'D', 'D', 36, { 1, 1, 2, 3, 1, 3 }, false },
99 { 'E', 'E', 37, { 1, 3, 2, 1, 1, 3 }, false },
100 { 'F', 'F', 38, { 1, 3, 2, 3, 1, 1 }, false },
101 { 'G', 'G', 39, { 2, 1, 1, 3, 1, 3 }, false },
102 { 'H', 'H', 40, { 2, 3, 1, 1, 1, 3 }, false },
103 { 'I', 'I', 41, { 2, 3, 1, 3, 1, 1 }, false },
104 { 'J', 'J', 42, { 1, 1, 2, 1, 3, 3 }, false },
105 { 'K', 'K', 43, { 1, 1, 2, 3, 3, 1 }, false },
106 { 'L', 'L', 44, { 1, 3, 2, 1, 3, 1 }, false },
107 { 'M', 'M', 45, { 1, 1, 3, 1, 2, 3 }, false },
108 { 'N', 'N', 46, { 1, 1, 3, 3, 2, 1 }, false },
109 { 'O', 'O', 47, { 1, 3, 3, 1, 2, 1 }, false },
110 { 'P', 'P', 48, { 3, 1, 3, 1, 2, 1 }, false },
111 { 'Q', 'Q', 49, { 2, 1, 1, 3, 3, 1 }, false },
112 { 'R', 'R', 50, { 2, 3, 1, 1, 3, 1 }, false },
113 { 'S', 'S', 51, { 2, 1, 3, 1, 1, 3 }, false },
114 { 'T', 'T', 52, { 2, 1, 3, 3, 1, 1 }, false },
115 { 'U', 'U', 53, { 2, 1, 3, 1, 3, 1 }, false },
116 { 'V', 'V', 54, { 3, 1, 1, 1, 2, 3 }, false },
117 { 'W', 'W', 55, { 3, 1, 1, 3, 2, 1 }, false },
118 { 'X', 'X', 56, { 3, 3, 1, 1, 2, 1 }, false },
119 { 'Y', 'Y', 57, { 3, 1, 2, 1, 1, 3 }, false },
120 { 'Z', 'Z', 58, { 3, 1, 2, 3, 1, 1 }, false },
121 { '[', '[', 59, { 3, 3, 2, 1, 1, 1 }, false },
122 { '\\', '\\', 60, { 3, 1, 4, 1, 1, 1 }, false },
123 { ']', ']', 61, { 2, 2, 1, 4, 1, 1 }, false },
124 { '^', '^', 62, { 4, 3, 1, 1, 1, 1 }, false },
125 { '_', '_', 63, { 1, 1, 1, 2, 2, 4 }, false },
126 { 0x00, '`', 64, { 1, 1, 1, 4, 2, 2 }, false }, // NUL
127 { 0x01, 'a', 65, { 1, 2, 1, 1, 2, 4 }, false }, // SOH
128 { 0x02, 'b', 66, { 1, 2, 1, 4, 2, 1 }, false }, // STX
129 { 0x03, 'c', 67, { 1, 4, 1, 1, 2, 2 }, false }, // ETX
130 { 0x04, 'd', 68, { 1, 4, 1, 2, 2, 1 }, false }, // EOT
131 { 0x05, 'e', 69, { 1, 1, 2, 2, 1, 4 }, false }, // ENQ
132 { 0x06, 'f', 70, { 1, 1, 2, 4, 1, 2 }, false }, // ACK
133 { 0x07, 'g', 71, { 1, 2, 2, 1, 1, 4 }, false }, // BEL
134 { 0x08, 'h', 72, { 1, 2, 2, 4, 1, 1 }, false }, // BS
135 { 0x09, 'i', 73, { 1, 4, 2, 1, 1, 2 }, false }, // HT
136 { 0x0A, 'j', 74, { 1, 4, 2, 2, 1, 1 }, false }, // LF
137 { 0x0B, 'k', 75, { 2, 4, 1, 2, 1, 1 }, false }, // VT
138 { 0x0C, 'l', 76, { 2, 2, 1, 1, 1, 4 }, false }, // FF
139 { 0x0D, 'm', 77, { 4, 1, 3, 1, 1, 1 }, false }, // CR
140 { 0x0E, 'n', 78, { 2, 4, 1, 1, 1, 2 }, false }, // SO
141 { 0x0F, 'o', 79, { 1, 3, 4, 1, 1, 1 }, false }, // SI
142 { 0x10, 'p', 80, { 1, 1, 1, 2, 4, 2 }, false }, // DLE
143 { 0x11, 'q', 81, { 1, 2, 1, 1, 4, 2 }, false }, // DC1
144 { 0x12, 'r', 82, { 1, 2, 1, 2, 4, 1 }, false }, // DC2
145 { 0x13, 's', 83, { 1, 1, 4, 2, 1, 2 }, false }, // DC3
146 { 0x14, 't', 84, { 1, 2, 4, 1, 1, 2 }, false }, // DC4
147 { 0x15, 'u', 85, { 1, 2, 4, 2, 1, 1 }, false }, // NAK
148 { 0x16, 'v', 86, { 4, 1, 1, 2, 1, 2 }, false }, // SYN
149 { 0x17, 'w', 87, { 4, 2, 1, 1, 1, 2 }, false }, // ETB
150 { 0x18, 'x', 88, { 4, 2, 1, 2, 1, 1 }, false }, // CAN
151 { 0x19, 'y', 89, { 2, 1, 2, 1, 4, 1 }, false }, // EM
152 { 0x1A, 'z', 90, { 2, 1, 4, 1, 2, 1 }, false }, // SUB
153 { 0x1B, '{', 91, { 4, 1, 2, 1, 2, 1 }, false }, // ESC
154 { 0x1C, '|', 92, { 1, 1, 1, 1, 4, 3 }, false }, // FS
155 { 0x1D, '}', 93, { 1, 1, 1, 3, 4, 1 }, false }, // GS
156 { 0x1E, '~', 94, { 1, 3, 1, 1, 4, 1 }, false }, // RS
157 { 0x1F, 0x7F, 95, { 1, 1, 4, 1, 1, 3 }, false }, // US DEL
158 { FNC3, FNC3, 96, { 1, 1, 4, 3, 1, 1 }, false }, // FNC3 FNC3
159 { FNC2, FNC2, 97, { 4, 1, 1, 1, 1, 3 }, false }, // FNC2 FNC2
160 { SHIFT, SHIFT, 98, { 4, 1, 1, 3, 1, 1 }, false }, // SHIFT SHIFT
161 { CODEC, CODEC, 99, { 1, 1, 3, 1, 4, 1 }, false }, // CODEC CODEC
162 { CODEB, FNC4, CODEB, { 1, 1, 4, 1, 3, 1 }, false }, // CODEB FNC4 CODEB
163 { FNC4, CODEA, CODEA, { 3, 1, 1, 1, 4, 1 }, false }, // FNC4 CODEA CODEA
164 { FNC1, FNC1, FNC1, { 4, 1, 1, 1, 3, 1 }, false }, // FNC1 FNC1 FNC1
165 { STARTA, STARTA, STARTA, { 2, 1, 1, 4, 1, 2 }, false }, // STARTA
166 { STARTB, STARTB, STARTB, { 2, 1, 1, 2, 1, 4 }, false }, // STARTB
167 { STARTC, STARTC, STARTC, { 2, 1, 1, 2, 3, 2 }, false }, // STARTC
168
169 { '\0', '\0', '\0', { 0, 0, 0, 0, 0, 0 }, true } // null termininator of list
170};
171
172// STOP CHARACTER { 2 3 3 1 1 1 2 }
173
174int code128Index(QChar code, int set)
175{
176 const char latin1Code = code.toLatin1();
177 for (int idx = 0; _128codes[idx]._null == false; ++idx) {
178 if (set == SETA && _128codes[idx].codea == latin1Code) return idx;
179 if (set == SETB && _128codes[idx].codeb == latin1Code) return idx;
180 if (set == SETC && _128codes[idx].codec == latin1Code) return idx;
181 }
182 return -1; // couldn't find it
183}
184
185
186
187void renderCode128(OROPage * page, const QRectF & r, const QString & _str, Qt::Alignment align)
188{
189 QVector<int> str;
190
191 // create the list.. if the list is empty then just set a start code and move on
192 if (_str.isEmpty())
193 str.push_back(104);
194 else {
195 int rank_a = 0;
196 int rank_b = 0;
197 int rank_c = 0;
198
199 QChar c;
200 for (int i = 0; i < _str.length(); ++i) {
201 c = _str.at(i);
202 rank_a += (code128Index(c, SETA) != -1 ? 1 : 0);
203 rank_b += (code128Index(c, SETB) != -1 ? 1 : 0);
204 rank_c += (c >= QLatin1Char('0') && c <= QLatin1Char('9') ? 1 : 0);
205 }
206 if (rank_c == _str.length() && ((rank_c % 2) == 0 || rank_c > 4)) {
207 // every value in the is a digit so we are going to go with mode C
208 // and we have an even number or we have more than 4 values
209 int i;
210 if ((rank_c % 2) == 1) {
211 str.push_back(104); // START B
212 c = _str.at(0);
213 str.push_back(code128Index(c, SETB));
214 str.push_back(99); // MODE C
215 i = 1;
216 } else {
217 str.push_back(105); // START C
218 i = 0;
219 }
220
221 for (; i < _str.length(); i += 2) {
222 char a, b;
223 c = _str.at(i);
224 a = c.toLatin1();
225 a -= 48;
226 c = _str.at(i + 1);
227 b = c.toLatin1();
228 b -= 48;
229 str.push_back(int((a * 10) + b));
230 }
231 } else {
232 // start in the mode that had the higher number of hits and then
233 // just shift into the opposite mode as needed
234 int set = (rank_a > rank_b ? SETA : SETB);
235 str.push_back((rank_a > rank_b ? 103 : 104));
236 for (int i = 0; i < _str.length(); ++i) {
237 c = _str.at(i);
238 int v = code128Index(c, set);
239 if (v == -1) {
240 v = code128Index(c, (set == SETA ? SETB : SETA));
241 if (v != -1) {
242 str.push_back(98); // SHIFT
243 str.push_back(v);
244 }
245 } else
246 str.push_back(v);
247 }
248 }
249 }
250
251 // calculate and append the checksum value to the list
252 int checksum = str.at(0);
253 for (int i = 1; i < str.size(); ++i)
254 checksum += (str.at(i) * i);
255 checksum = checksum % 103;
256 str.push_back(checksum);
257
258 // lets determine some core attributes about this barcode
259 qreal bar_width = 1; // the width of the base unit bar 1/100 inch
260
261 // this is are mandatory minimum quiet zone
262 qreal quiet_zone = bar_width * 10;
263 if (quiet_zone < 0.1)
264 quiet_zone = 0.1;
265
266 // what kind of area do we have to work with
267 qreal draw_width = r.width();
268 qreal draw_height = r.height();
269
270 // how long is the value we need to encode?
271 int val_length = str.size() - 2; // we include start and checksum in are list so
272 // subtract them out for our calculations
273
274 // L = (11C + 35)X
275 // L length of barcode (excluding quite zone) in units same as X and I
276 // C the number of characters in the value excluding the start/stop and checksum characters
277 // X the width of a bar (pixels in our case)
278 qreal L;
279
280 qreal C = val_length;
281 qreal X = bar_width;
282
283 L = (((11.0 * C) + 35.0) * X);
284
285 // now we have the actual width the barcode will be so can determine the actual
286 // size of the quiet zone (we assume we center the barcode in the given area
287 // what should we do if the area is too small????
288 // At the moment the way the code is written is we will always start at the minimum
289 // required quiet zone if we don't have enough space.... I guess we'll just have over-run
290 // to the right
291 //
292 // calculate the starting position based on the alignment option
293 // for left align we don't need to do anything as the values are already setup for it
294 if (align == Qt::AlignHCenter) {
295 qreal nqz = (draw_width - L) / 2.0;
296 if (nqz > quiet_zone)
297 quiet_zone = nqz;
298 } else if (align == Qt::AlignRight) {
299 quiet_zone = draw_width - (L + quiet_zone);
300 }
301 // left : do nothing
302
303 qreal pos = r.left() + quiet_zone;
304 qreal top = r.top();
305
306 QPen pen(Qt::NoPen);
307 QBrush brush(QColor("black"));
308
309 bool space = false;
310 for (int i = 0; i < str.size(); ++i) {
311 // loop through each value and render the barcode
312 const int idx = str.at(i);
313 if (idx < 0 || idx > 105) {
314 kreportpluginWarning() << "Encountered a non-compliant element while rendering a 3of9 barcode -- skipping";
315 continue;
316 }
317 space = false;
318 for (int b = 0; b < 6; ++b, space = !space) {
319 qreal w = _128codes[idx].values[b] * bar_width;
320 if (!space) {
321 ORORect * rect = new ORORect();
322 rect->setPen(pen);
323 rect->setBrush(brush);
324 rect->setRect(QRectF(pos, top, w, draw_height));
325 page->insertPrimitive(rect);
326 }
327 pos += w;
328 }
329 }
330
331 // we have to do the stop character separately like this because it has
332 // 7 elements in it's bar sequence rather than 6 like the others
333 int STOP_CHARACTER[] = { 2, 3, 3, 1, 1, 1, 2 };
334 space = false;
335 for (int b = 0; b < 7; ++b, space = !space) {
336 qreal w = STOP_CHARACTER[b] * bar_width;
337 if (!space) {
338 ORORect * rect = new ORORect();
339 rect->setPen(pen);
340 rect->setBrush(brush);
341 rect->setRect(QRectF(pos, top, w, draw_height));
342 page->insertPrimitive(rect);
343 }
344 pos += w;
345 }
346}
OROPage
Represents a single page in a document and may contain zero or more OROPrimitive objects all of which...
Definition KReportRenderObjects.h:168
ORORect
Defines a rectangle.
Definition KReportRenderObjects.h:380
QChar::toLatin1
char toLatin1() const const
QList::at
const_reference at(qsizetype i) const const
QList::push_back
void push_back(parameter_type value)
QList::size
qsizetype size() const const
QRectF::height
qreal height() const const
QRectF::left
qreal left() const const
QRectF::top
qreal top() const const
QRectF::width
qreal width() const const
QString::at
const QChar at(qsizetype position) const const
QString::isEmpty
bool isEmpty() const const
QString::length
qsizetype length() const const
Qt::Alignment
typedef Alignment
This file is part of the KDE documentation.
Documentation copyright © 1996-2024 The KDE developers.
Generated on Sat Dec 21 2024 17:06:04 by doxygen 1.12.0 written by Dimitri van Heesch, © 1997-2006

KDE's Doxygen guidelines are available online.