File indexing completed on 2024-05-12 04:43:18

 /* This file is part of the KDE project
  * Copyright (C) 2001-2007 by OpenMFG, LLC (info@openmfg.com)
  * Copyright (C) 2007-2008 by Adam Pigg (adam@piggz.co.uk)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /*
  *     This file contains the implementation of the 3of9 barcode renderer.
  * All this code assumes a 100dpi rendering surface for it's calculations.
  */
 
 #include <QString>
 #include <QPainter>
 #include <QPen>
 #include <QBrush>
 
 #include "kreportplugin_debug.h"
 
 struct code3of9 {
     char code;
     int values[9];
 };
 
 const struct code3of9 _3of9codes[] = {
     { '0', { 0, 0, 0, 1, 1, 0, 1, 0, 0 } },
     { '1', { 1, 0, 0, 1, 0, 0, 0, 0, 1 } },
     { '2', { 0, 0, 1, 1, 0, 0, 0, 0, 1 } },
     { '3', { 1, 0, 1, 1, 0, 0, 0, 0, 0 } },
     { '4', { 0, 0, 0, 1, 1, 0, 0, 0, 1 } },
     { '5', { 1, 0, 0, 1, 1, 0, 0, 0, 0 } },
     { '6', { 0, 0, 1, 1, 1, 0, 0, 0, 0 } },
     { '7', { 0, 0, 0, 1, 0, 0, 1, 0, 1 } },
     { '8', { 1, 0, 0, 1, 0, 0, 1, 0, 0 } },
     { '9', { 0, 0, 1, 1, 0, 0, 1, 0, 0 } },
 
     { 'A', { 1, 0, 0, 0, 0, 1, 0, 0, 1 } },
     { 'B', { 0, 0, 1, 0, 0, 1, 0, 0, 1 } },
     { 'C', { 1, 0, 1, 0, 0, 1, 0, 0, 0 } },
     { 'D', { 0, 0, 0, 0, 1, 1, 0, 0, 1 } },
     { 'E', { 1, 0, 0, 0, 1, 1, 0, 0, 0 } },
     { 'F', { 0, 0, 1, 0, 1, 1, 0, 0, 0 } },
     { 'G', { 0, 0, 0, 0, 0, 1, 1, 0, 1 } },
     { 'H', { 1, 0, 0, 0, 0, 1, 1, 0, 0 } },
     { 'I', { 0, 0, 1, 0, 0, 1, 1, 0, 0 } },
     { 'J', { 0, 0, 0, 0, 1, 1, 1, 0, 0 } },
     { 'K', { 1, 0, 0, 0, 0, 0, 0, 1, 1 } },
     { 'L', { 0, 0, 1, 0, 0, 0, 0, 1, 1 } },
     { 'M', { 1, 0, 1, 0, 0, 0, 0, 1, 0 } },
     { 'N', { 0, 0, 0, 0, 1, 0, 0, 1, 1 } },
     { 'O', { 1, 0, 0, 0, 1, 0, 0, 1, 0 } },
     { 'P', { 0, 0, 1, 0, 1, 0, 0, 1, 0 } },
     { 'Q', { 0, 0, 0, 0, 0, 0, 1, 1, 1 } },
     { 'R', { 1, 0, 0, 0, 0, 0, 1, 1, 0 } },
     { 'S', { 0, 0, 1, 0, 0, 0, 1, 1, 0 } },
     { 'T', { 0, 0, 0, 0, 1, 0, 1, 1, 0 } },
     { 'U', { 1, 1, 0, 0, 0, 0, 0, 0, 1 } },
     { 'V', { 0, 1, 1, 0, 0, 0, 0, 0, 1 } },
     { 'W', { 1, 1, 1, 0, 0, 0, 0, 0, 0 } },
     { 'X', { 0, 1, 0, 0, 1, 0, 0, 0, 1 } },
     { 'Y', { 1, 1, 0, 0, 1, 0, 0, 0, 0 } },
     { 'Z', { 0, 1, 1, 0, 1, 0, 0, 0, 0 } },
 
     { '-', { 0, 1, 0, 0, 0, 0, 1, 0, 1 } },
     { '.', { 1, 1, 0, 0, 0, 0, 1, 0, 0 } },
     { ' ', { 0, 1, 1, 0, 0, 0, 1, 0, 0 } },
     { '$', { 0, 1, 0, 1, 0, 1, 0, 0, 0 } },
     { '/', { 0, 1, 0, 1, 0, 0, 0, 1, 0 } },
     { '+', { 0, 1, 0, 0, 0, 1, 0, 1, 0 } },
     { '%', { 0, 0, 0, 1, 0, 1, 0, 1, 0 } },
 
     { '*', { 0, 1, 0, 0, 1, 0, 1, 0, 0 } }, // this is a special start/stop character
 
     { '\0', { 0, 0, 0, 0, 0, 0, 0, 0, 0 } } // null termininator of list
 };
 
 int codeIndexP(QChar code)
 {
     // we are a case insensitive search
     const char latin1Code = code.toUpper().toLatin1();
     for (int idx = 0; _3of9codes[idx].code != '\0'; idx++) {
         if (_3of9codes[idx].code == latin1Code) return idx;
     }
     return -1;  // couldn't find it
 }
 
 void render3of9(const QRect & r, const QString & _str, Qt::Alignment align, QPainter * pPainter)
 {
     QString str = _str;
     // lets determine some core attributes about this barcode
     int narrow_bar = 1; // a narrow bar is 1px wide
     int interchange_gap = narrow_bar; // the space between each 'set' of bars
     int bar_width_mult = 2; // the wide bar width multiple of the narrow bar
 
     // this is are mandatory minimum quiet zone
     int quiet_zone = narrow_bar * 10;
     //if (quiet_zone < 10) quiet_zone = 10;
 
     // what kind of area do we have to work with
     int draw_width = r.width();
     int draw_height = r.height();
 
     // how long is the value we need to encode?
     int val_length = str.length();
 
     // L = (C + 2)(3N + 6)X + (C + 1)I
     // L length of barcode (excluding quite zone) in units same as X and I
     // C the number of characters in the value excluding the start/stop
     // N the bar width multiple for wide bars
     // X the width of a bar (pixels in our case)
     // I the interchange gap in the same units as X (value is same as X for our case)
     int L;
 
     int C = val_length;
     int N = bar_width_mult;
     int X = narrow_bar;
     int I = interchange_gap;
 
     L = ((C + 2) * (3 * N + 6) * X) + ((C + 1) * I);
 
     // now we have the actual width the barcode will be so can determine the actual
     // size of the quiet zone (we assume we center the barcode in the given area
     // what should we do if the area is too small????
     // At the moment the way the code is written is we will always start at the minimum
     // required quiet zone if we don't have enough space.... I guess we'll just have over-run
     // to the right
     //
     // calculate the starting position based on the alignment option
     // for left align we don't need to do anything as the values are already setup for it
     if (align == Qt::AlignHCenter) {
         int nqz = (draw_width - L) / 2;
         if (nqz > quiet_zone) quiet_zone = nqz;
     } else if (align == Qt::AlignRight) {
         quiet_zone = draw_width - (L + quiet_zone);
     }
     // left : do nothing
 
     int pos = r.left() + quiet_zone;
     int top = r.top();
 
     // ok we need to prepend and append the str with a *
     str = QLatin1Char('*') + str + QLatin1Char('*');
 
     if (pPainter) {
         pPainter->save();
 
         QPen oneWide(pPainter->pen());
         oneWide.setWidth(1);
 #ifndef Q_OS_WIN32
         oneWide.setJoinStyle(Qt::MiterJoin);
 #endif
         pPainter->setPen(oneWide);
         pPainter->setBrush(pPainter->pen().color());
     }
     for (int i = 0; i < str.length(); i++) {
         // loop through each char and render the barcode
         QChar c = str.at(i);
         int idx = codeIndexP(c);
         if (idx == -1) {
             kreportpluginWarning() << "Encountered a non-compliant character while rendering a 3of9 barcode -- skipping";
             continue;
         }
 
         bool space = false;
         for (int b = 0; b < 9; b++, space = !space) {
             int w = (_3of9codes[idx].values[b] == 1 ? narrow_bar * bar_width_mult : narrow_bar);
             if (!space && pPainter) {
                 pPainter->fillRect(pos, top, w, draw_height, pPainter->pen().color());
             }
             pos += w;
         }
         pos += interchange_gap;
     }
     if (pPainter) {
         pPainter->restore();
     }
 }