KReport

code128paint.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 <QPainter>
28#include <QPen>
29#include <QBrush>
30
31#include "KReportRenderObjects.h"
32#include "kreportplugin_debug.h"
33
34static const int SETA = 0;
35static const int SETB = 1;
36static const int SETC = 2;
37
38static const char FNC1 = (char)130;
39static const char FNC2 = (char)131;
40static const char FNC3 = (char)132;
41static const char FNC4 = (char)133;
42static const char SHIFT = (char)134;
43static const char CODEA = (char)135;
44static const char CODEB = (char)136;
45static const char CODEC = (char)137;
46static const char STARTA = (char)138;
47static const char STARTB = (char)139;
48static const char STARTC = (char)140;
49
50
51struct code128 {
52 char codea;
53 char codeb;
54 char codec;
55
56 int values[6];
57
58 bool _null;
59};
60
61static const struct code128 _128codes[] = {
62 // A , B , C , { B S B S B S }, NULL? },
63 { ' ', ' ', 0, { 2, 1, 2, 2, 2, 2 }, false },
64 { '!', '!', 1, { 2, 2, 2, 1, 2, 2 }, false },
65 { '"', '"', 2, { 2, 2, 2, 2, 2, 1 }, false },
66 { '#', '#', 3, { 1, 2, 1, 2, 2, 3 }, false },
67 { '$', '$', 4, { 1, 2, 1, 3, 2, 2 }, false },
68 { '%', '%', 5, { 1, 3, 1, 2, 2, 2 }, false },
69 { '&', '&', 6, { 1, 2, 2, 2, 1, 3 }, false },
70 { '\'', '\'', 7, { 1, 2, 2, 3, 1, 2 }, false },
71 { '(', '(', 8, { 1, 3, 2, 2, 1, 2 }, false },
72 { ')', ')', 9, { 2, 2, 1, 2, 1, 3 }, false },
73 { '*', '*', 10, { 2, 2, 1, 3, 1, 2 }, false },
74 { '+', '+', 11, { 2, 3, 1, 2, 1, 2 }, false },
75 { ',', ',', 12, { 1, 1, 2, 2, 3, 2 }, false },
76 { '-', '-', 13, { 1, 2, 2, 1, 3, 2 }, false },
77 { '.', '.', 14, { 1, 2, 2, 2, 3, 1 }, false },
78 { '/', '/', 15, { 1, 1, 3, 2, 2, 2 }, false },
79 { '0', '0', 16, { 1, 2, 3, 1, 2, 2 }, false },
80 { '1', '1', 17, { 1, 2, 3, 2, 2, 1 }, false },
81 { '2', '2', 18, { 2, 2, 3, 2, 1, 1 }, false },
82 { '3', '3', 19, { 2, 2, 1, 1, 3, 2 }, false },
83 { '4', '4', 20, { 2, 2, 1, 2, 3, 1 }, false },
84 { '5', '5', 21, { 2, 1, 3, 2, 1, 2 }, false },
85 { '6', '6', 22, { 2, 2, 3, 1, 1, 2 }, false },
86 { '7', '7', 23, { 3, 1, 2, 1, 3, 1 }, false },
87 { '8', '8', 24, { 3, 1, 1, 2, 2, 2 }, false },
88 { '9', '9', 25, { 3, 2, 1, 1, 2, 2 }, false },
89 { ':', ':', 26, { 3, 2, 1, 2, 2, 1 }, false },
90 { ';', ';', 27, { 3, 1, 2, 2, 1, 2 }, false },
91 { '<', '<', 28, { 3, 2, 2, 1, 1, 2 }, false },
92 { '=', '=', 29, { 3, 2, 2, 2, 1, 1 }, false },
93 { '>', '>', 30, { 2, 1, 2, 1, 2, 3 }, false },
94 { '?', '?', 31, { 2, 1, 2, 3, 2, 1 }, false },
95 { '@', '@', 32, { 2, 3, 2, 1, 2, 1 }, false },
96 { 'A', 'A', 33, { 1, 1, 1, 3, 2, 3 }, false },
97 { 'B', 'B', 34, { 1, 3, 1, 1, 2, 3 }, false },
98 { 'C', 'C', 35, { 1, 3, 1, 3, 2, 1 }, false },
99 { 'D', 'D', 36, { 1, 1, 2, 3, 1, 3 }, false },
100 { 'E', 'E', 37, { 1, 3, 2, 1, 1, 3 }, false },
101 { 'F', 'F', 38, { 1, 3, 2, 3, 1, 1 }, false },
102 { 'G', 'G', 39, { 2, 1, 1, 3, 1, 3 }, false },
103 { 'H', 'H', 40, { 2, 3, 1, 1, 1, 3 }, false },
104 { 'I', 'I', 41, { 2, 3, 1, 3, 1, 1 }, false },
105 { 'J', 'J', 42, { 1, 1, 2, 1, 3, 3 }, false },
106 { 'K', 'K', 43, { 1, 1, 2, 3, 3, 1 }, false },
107 { 'L', 'L', 44, { 1, 3, 2, 1, 3, 1 }, false },
108 { 'M', 'M', 45, { 1, 1, 3, 1, 2, 3 }, false },
109 { 'N', 'N', 46, { 1, 1, 3, 3, 2, 1 }, false },
110 { 'O', 'O', 47, { 1, 3, 3, 1, 2, 1 }, false },
111 { 'P', 'P', 48, { 3, 1, 3, 1, 2, 1 }, false },
112 { 'Q', 'Q', 49, { 2, 1, 1, 3, 3, 1 }, false },
113 { 'R', 'R', 50, { 2, 3, 1, 1, 3, 1 }, false },
114 { 'S', 'S', 51, { 2, 1, 3, 1, 1, 3 }, false },
115 { 'T', 'T', 52, { 2, 1, 3, 3, 1, 1 }, false },
116 { 'U', 'U', 53, { 2, 1, 3, 1, 3, 1 }, false },
117 { 'V', 'V', 54, { 3, 1, 1, 1, 2, 3 }, false },
118 { 'W', 'W', 55, { 3, 1, 1, 3, 2, 1 }, false },
119 { 'X', 'X', 56, { 3, 3, 1, 1, 2, 1 }, false },
120 { 'Y', 'Y', 57, { 3, 1, 2, 1, 1, 3 }, false },
121 { 'Z', 'Z', 58, { 3, 1, 2, 3, 1, 1 }, false },
122 { '[', '[', 59, { 3, 3, 2, 1, 1, 1 }, false },
123 { '\\', '\\', 60, { 3, 1, 4, 1, 1, 1 }, false },
124 { ']', ']', 61, { 2, 2, 1, 4, 1, 1 }, false },
125 { '^', '^', 62, { 4, 3, 1, 1, 1, 1 }, false },
126 { '_', '_', 63, { 1, 1, 1, 2, 2, 4 }, false },
127 { 0x00, '`', 64, { 1, 1, 1, 4, 2, 2 }, false }, // NUL
128 { 0x01, 'a', 65, { 1, 2, 1, 1, 2, 4 }, false }, // SOH
129 { 0x02, 'b', 66, { 1, 2, 1, 4, 2, 1 }, false }, // STX
130 { 0x03, 'c', 67, { 1, 4, 1, 1, 2, 2 }, false }, // ETX
131 { 0x04, 'd', 68, { 1, 4, 1, 2, 2, 1 }, false }, // EOT
132 { 0x05, 'e', 69, { 1, 1, 2, 2, 1, 4 }, false }, // ENQ
133 { 0x06, 'f', 70, { 1, 1, 2, 4, 1, 2 }, false }, // ACK
134 { 0x07, 'g', 71, { 1, 2, 2, 1, 1, 4 }, false }, // BEL
135 { 0x08, 'h', 72, { 1, 2, 2, 4, 1, 1 }, false }, // BS
136 { 0x09, 'i', 73, { 1, 4, 2, 1, 1, 2 }, false }, // HT
137 { 0x0A, 'j', 74, { 1, 4, 2, 2, 1, 1 }, false }, // LF
138 { 0x0B, 'k', 75, { 2, 4, 1, 2, 1, 1 }, false }, // VT
139 { 0x0C, 'l', 76, { 2, 2, 1, 1, 1, 4 }, false }, // FF
140 { 0x0D, 'm', 77, { 4, 1, 3, 1, 1, 1 }, false }, // CR
141 { 0x0E, 'n', 78, { 2, 4, 1, 1, 1, 2 }, false }, // SO
142 { 0x0F, 'o', 79, { 1, 3, 4, 1, 1, 1 }, false }, // SI
143 { 0x10, 'p', 80, { 1, 1, 1, 2, 4, 2 }, false }, // DLE
144 { 0x11, 'q', 81, { 1, 2, 1, 1, 4, 2 }, false }, // DC1
145 { 0x12, 'r', 82, { 1, 2, 1, 2, 4, 1 }, false }, // DC2
146 { 0x13, 's', 83, { 1, 1, 4, 2, 1, 2 }, false }, // DC3
147 { 0x14, 't', 84, { 1, 2, 4, 1, 1, 2 }, false }, // DC4
148 { 0x15, 'u', 85, { 1, 2, 4, 2, 1, 1 }, false }, // NAK
149 { 0x16, 'v', 86, { 4, 1, 1, 2, 1, 2 }, false }, // SYN
150 { 0x17, 'w', 87, { 4, 2, 1, 1, 1, 2 }, false }, // ETB
151 { 0x18, 'x', 88, { 4, 2, 1, 2, 1, 1 }, false }, // CAN
152 { 0x19, 'y', 89, { 2, 1, 2, 1, 4, 1 }, false }, // EM
153 { 0x1A, 'z', 90, { 2, 1, 4, 1, 2, 1 }, false }, // SUB
154 { 0x1B, '{', 91, { 4, 1, 2, 1, 2, 1 }, false }, // ESC
155 { 0x1C, '|', 92, { 1, 1, 1, 1, 4, 3 }, false }, // FS
156 { 0x1D, '}', 93, { 1, 1, 1, 3, 4, 1 }, false }, // GS
157 { 0x1E, '~', 94, { 1, 3, 1, 1, 4, 1 }, false }, // RS
158 { 0x1F, 0x7F, 95, { 1, 1, 4, 1, 1, 3 }, false }, // US DEL
159 { FNC3, FNC3, 96, { 1, 1, 4, 3, 1, 1 }, false }, // FNC3 FNC3
160 { FNC2, FNC2, 97, { 4, 1, 1, 1, 1, 3 }, false }, // FNC2 FNC2
161 { SHIFT, SHIFT, 98, { 4, 1, 1, 3, 1, 1 }, false }, // SHIFT SHIFT
162 { CODEC, CODEC, 99, { 1, 1, 3, 1, 4, 1 }, false }, // CODEC CODEC
163 { CODEB, FNC4, CODEB, { 1, 1, 4, 1, 3, 1 }, false }, // CODEB FNC4 CODEB
164 { FNC4, CODEA, CODEA, { 3, 1, 1, 1, 4, 1 }, false }, // FNC4 CODEA CODEA
165 { FNC1, FNC1, FNC1, { 4, 1, 1, 1, 3, 1 }, false }, // FNC1 FNC1 FNC1
166 { STARTA, STARTA, STARTA, { 2, 1, 1, 4, 1, 2 }, false }, // STARTA
167 { STARTB, STARTB, STARTB, { 2, 1, 1, 2, 1, 4 }, false }, // STARTB
168 { STARTC, STARTC, STARTC, { 2, 1, 1, 2, 3, 2 }, false }, // STARTC
169
170 { '\0', '\0', '\0', { 0, 0, 0, 0, 0, 0 }, true } // null termininator of list
171};
172
173// STOP CHARACTER { 2 3 3 1 1 1 2 }
174
175int code128IndexP(QChar code, int set)
176{
177 const char latin1Code = code.toLatin1();
178 for (int idx = 0; _128codes[idx]._null == false; idx++) {
179 if (set == SETA && _128codes[idx].codea == latin1Code) return idx;
180 if (set == SETB && _128codes[idx].codeb == latin1Code) return idx;
181 if (set == SETC && _128codes[idx].codec == latin1Code) return idx;
182 }
183 return -1; // couldn't find it
184}
185
186void renderCode128(const QRect & r, const QString & _str, Qt::Alignment align, QPainter * pPainter)
187{
188 QVector<int> str;
189
190 // create the list.. if the list is empty then just set a start code and move on
191 if (_str.isEmpty()) {
192 str.push_back(104);
193 } else {
194 int rank_a = 0;
195 int rank_b = 0;
196 int rank_c = 0;
197
198 QChar c;
199 for (int i = 0; i < _str.length(); ++i) {
200 c = _str.at(i);
201 rank_a += (code128IndexP(c, SETA) != -1 ? 1 : 0);
202 rank_b += (code128IndexP(c, SETB) != -1 ? 1 : 0);
203 rank_c += (c >= QLatin1Char('0') && c <= QLatin1Char('9') ? 1 : 0);
204 }
205 if (rank_c == _str.length() && ((rank_c % 2) == 0 || rank_c > 4)) {
206 // every value in the is a digit so we are going to go with mode C
207 // and we have an even number or we have more than 4 values
208 int i;
209 if ((rank_c % 2) == 1) {
210 str.push_back(104); // START B
211 c = _str.at(0);
212 str.push_back(code128IndexP(c, SETB));
213 str.push_back(99); // MODE C
214 i = 1;
215 } else {
216 str.push_back(105); // START C
217 i = 0;
218 }
219 for (; i < _str.length(); i += 2) {
220 char a, b;
221 c = _str.at(i);
222 a = c.toLatin1();
223 a -= 48;
224 c = _str.at(i + 1);
225 b = c.toLatin1();
226 b -= 48;
227 str.push_back(int((a * 10) + b));
228 }
229 } else {
230 // start in the mode that had the higher number of hits and then
231 // just shift into the opposite mode as needed
232 int set = (rank_a > rank_b ? SETA : SETB);
233 str.push_back((rank_a > rank_b ? 103 : 104));
234 for (int i = 0; i < _str.length(); ++i) {
235 c = _str.at(i);
236 int v = code128IndexP(c, set);
237 if (v == -1) {
238 v = code128IndexP(c, (set == SETA ? SETB : SETA));
239 if (v != -1) {
240 str.push_back(98); // SHIFT
241 str.push_back(v);
242 }
243 } else {
244 str.push_back(v);
245 }
246 }
247 }
248 }
249
250 // calculate and append the checksum value to the list
251 int checksum = str.at(0);
252 for (int i = 1; i < str.size(); ++i) {
253 checksum += (str.at(i) * i);
254 }
255 checksum = checksum % 103;
256 str.push_back(checksum);
257
258 // lets determine some core attributes about this barcode
259 int bar_width = 1; // the width of the base unit bar
260
261 // this is are mandatory minimum quiet zone
262 int quiet_zone = bar_width * 10;
263 //if (quiet_zone < 10) quiet_zone = 10;
264
265 // what kind of area do we have to work with
266 int draw_width = r.width();
267 int draw_height = r.height();
268
269 // how long is the value we need to encode?
270 int val_length = str.size() - 2; // we include start and checksum in are list so
271 // subtract them out for our calculations
272
273 // L = (11C + 35)X
274 // L length of barcode (excluding quite zone) in units same as X and I
275 // C the number of characters in the value excluding the start/stop and checksum characters
276 // X the width of a bar (pixels in our case)
277 int L;
278
279 int C = val_length;
280 int X = bar_width;
281
282 L = (((11 * C) + 35) * X);
283
284 // now we have the actual width the barcode will be so can determine the actual
285 // size of the quiet zone (we assume we center the barcode in the given area
286 // what should we do if the area is too small????
287 // At the moment the way the code is written is we will always start at the minimum
288 // required quiet zone if we don't have enough space.... I guess we'll just have over-run
289 // to the right
290 //
291 // calculate the starting position based on the alignment option
292 // for left align we don't need to do anything as the values are already setup for it
293 if (align == Qt::AlignHCenter) {
294 int nqz = (draw_width - L) / 2;
295 if (nqz > quiet_zone) quiet_zone = nqz;
296 } else if (align == Qt::AlignRight) {
297 quiet_zone = draw_width - (L + quiet_zone);
298 }
299 // left : do nothing
300
301 int pos = r.left() + quiet_zone;
302 int top = r.top();
303
304 if (pPainter) {
305 pPainter->save();
306
307 QPen oneWide(pPainter->pen());
308 oneWide.setWidth(1);
309#ifndef Q_OS_WIN32
310 oneWide.setJoinStyle(Qt::MiterJoin);
311#endif
312 pPainter->setPen(oneWide);
313 pPainter->setBrush(pPainter->pen().color());
314 }
315
316
317 bool space = false;
318 for (int i = 0; i < str.size(); ++i) {
319 // loop through each value and render the barcode
320 int idx = str.at(i);
321 if (idx < 0 || idx > 105) {
322 kreportpluginWarning() << "Encountered a non-compliant element while rendering a 3of9 barcode -- skipping";
323 continue;
324 }
325 space = false;
326 for (int b = 0; b < 6; b++, space = !space) {
327 int w = _128codes[idx].values[b] * bar_width;
328 if (!space && pPainter) {
329 pPainter->fillRect(pos, top, w, draw_height, pPainter->pen().color());
330 }
331 pos += w;
332 }
333 }
334
335 // we have to do the stop character separately like this because it has
336 // 7 elements in it's bar sequence rather than 6 like the others
337 int STOP_CHARACTER[] = { 2, 3, 3, 1, 1, 1, 2 };
338 space = false;
339 for (int b = 0; b < 7; b++, space = !space) {
340 int w = STOP_CHARACTER[b] * bar_width;
341 if (!space && pPainter) {
342 pPainter->fillRect(pos, top, w, draw_height, pPainter->pen().color());
343 }
344 pos += w;
345 }
346
347 if (pPainter) {
348 pPainter->restore();
349 }
350}
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
QPainter::fillRect
void fillRect(const QRect &rectangle, QGradient::Preset preset)
QPainter::pen
const QPen & pen() const const
QPainter::restore
void restore()
QPainter::save
void save()
QPainter::setBrush
void setBrush(Qt::BrushStyle style)
QPainter::setPen
void setPen(Qt::PenStyle style)
QPen::color
QColor color() const const
QRect::height
int height() const const
QRect::left
int left() const const
QRect::top
int top() const const
QRect::width
int 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
Qt::MiterJoin
MiterJoin
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