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-rw-r--r--test/dbg_scan.cpp218
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diff --git a/test/dbg_scan.cpp b/test/dbg_scan.cpp
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+/*------------------------------------------------------------------------
+ * Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+ *
+ * This file is part of the ZBar Bar Code Reader.
+ *
+ * The ZBar Bar Code Reader is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * The ZBar Bar Code Reader 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 Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser Public License
+ * along with the ZBar Bar Code Reader; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ *
+ * http://sourceforge.net/projects/zbar
+ *------------------------------------------------------------------------*/
+
+#include <Magick++.h>
+#include <fstream>
+#include <iostream>
+#include <libgen.h>
+#include <zbar.h>
+
+using namespace std;
+using namespace zbar;
+
+#ifndef ZBAR_FIXED
+#define ZBAR_FIXED 5
+#endif
+
+#define ZBAR_FRAC (1 << ZBAR_FIXED)
+
+Decoder decoder;
+Scanner scanner;
+
+/* undocumented API for drawing cutesy debug graphics */
+extern "C" void zbar_scanner_get_state(const zbar_scanner_t *scn, unsigned *x,
+ unsigned *cur_edge, unsigned *last_edge,
+ int *y0, int *y1, int *y2,
+ int *y1_thresh);
+
+void scan_image(const char *filename)
+{
+ scanner.reset();
+ // normally scanner would reset associated decoder,
+ // but this debug program connects them manually
+ // (to make intermediate state more readily available)
+ // so decoder must also be reset manually
+ decoder.reset();
+
+ Magick::Image image;
+ image.read(filename);
+ string file = image.baseFilename();
+ size_t baseidx = file.rfind('/');
+ if (baseidx != string::npos)
+ file = file.substr(baseidx + 1, file.length() - baseidx - 1);
+ ofstream svg((file + ".svg").c_str());
+
+ unsigned inwidth = image.columns();
+ unsigned width = inwidth + 3;
+ unsigned height = image.rows();
+ unsigned midy = height / 2;
+ cerr << "x+: " << midy << endl;
+
+ image.crop(Magick::Geometry(inwidth, 1, 0, midy));
+
+ svg << "<?xml version='1.0'?>" << endl
+ << "<!DOCTYPE svg PUBLIC '-//W3C//DTD SVG 1.1//EN'"
+ << " 'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd'>" << endl
+ << "<svg version='1.1' id='top'"
+ << " width='10in' height='6in' preserveAspectRatio='xMinYMid slice'"
+ << " overflow='visible' viewBox='0,0 " << width * 2 << ",384'"
+ << " xmlns:xlink='http://www.w3.org/1999/xlink'"
+ << " xmlns='http://www.w3.org/2000/svg'>" << endl
+ << "<defs><style type='text/css'><![CDATA[" << endl
+ << " * { stroke-linejoin: round; stroke-linecap: round;"
+ << " stroke-width: .1; text-anchor: middle;"
+ << " image-rendering: optimizeSpeed;"
+ << " font-size: 6; font-weight: bold }" << endl
+ << " path { fill: none }" << endl
+ << " #zero { stroke: #00f }" << endl
+ << " #edges { stroke: #f00 }" << endl
+ << " #cur-edge { stroke: #f44 }" << endl
+ << " #raw { stroke: orange }" << endl
+ << " #y0 { stroke: yellow }" << endl
+ << " #y1 { stroke: #0c0 }" << endl
+ << " #y2 { stroke: #0aa }" << endl
+ << " .y1thr { stroke: #f0f }" << endl
+ << " rect.bar { fill: black }" << endl
+ << " text.bar { fill: white }" << endl
+ << " rect.space { fill: white }" << endl
+ << " text.space { fill: black }" << endl
+ << " text.data { fill: #44f; font-size: 16 }" << endl
+ << "]]></style></defs>" << endl
+ << "<image width='" << inwidth * 2 << "' height='384'"
+ << " preserveAspectRatio='none'"
+ << " xlink:href='" << file << ".png'/>" << endl
+ << "<g transform='translate(1,384) scale(2,-.5)'>" << endl;
+
+ // brute force
+ unsigned raw[inwidth];
+ {
+ // extract scan from image pixels
+ image.modifyImage();
+ Magick::Pixels view(image);
+ Magick::PixelPacket *pxp = view.get(0, 0, inwidth, 1);
+ Magick::ColorYUV y;
+ double max = 0;
+ svg << "<path id='raw' d='M";
+ unsigned i;
+ for (i = 0; i < inwidth; i++, pxp++) {
+ y = *pxp;
+ if (max < y.y())
+ max = y.y();
+ raw[i] = (unsigned)(y.y() * 0x100);
+ svg << ((i != 1) ? " " : " L ") << i << "," << raw[i];
+ y.u(0);
+ y.v(0);
+ *pxp = y;
+ }
+ view.sync();
+ svg << "'/>" << endl << "</g>" << endl;
+ }
+ image.depth(8);
+ image.write(file + ".png");
+
+ // process scan and capture calculated values
+ unsigned cur_edge[width], last_edge[width];
+ int y0[width], y1[width], y2[width], y1_thr[width];
+
+ svg << "<g transform='translate(-3)'>" << endl;
+ for (unsigned i = 0; i < width; i++) {
+ int edge;
+ if (i < inwidth)
+ edge = scanner.scan_y(raw[i]);
+ else
+ edge = scanner.flush();
+
+ unsigned x;
+ zbar_scanner_get_state(scanner, &x, &cur_edge[i], &last_edge[i], &y0[i],
+ &y1[i], &y2[i], &y1_thr[i]);
+ if (edge) {
+ unsigned w = scanner.get_width();
+ if (w)
+ svg << "<rect x='" << (2. * (last_edge[i] - w) / ZBAR_FRAC)
+ << "' width='" << (w * 2. / ZBAR_FRAC)
+ << "' height='32' class='"
+ << (scanner.get_color() ? "space" : "bar") << "'/>" << endl
+ << "<text transform='translate("
+ << ((2. * last_edge[i] - w) / ZBAR_FRAC) - 3
+ << ",16) rotate(90)' class='"
+ << (scanner.get_color() ? "space" : "bar") << "'>" << endl
+ << w << "</text>" << endl;
+ zbar_symbol_type_t sym = decoder.decode_width(w);
+ if (sym > ZBAR_PARTIAL) {
+ svg << "<text transform='translate("
+ << (2. * (last_edge[i] + w) / ZBAR_FRAC)
+ << ",208) rotate(90)' class='data'>"
+ << decoder.get_data_string() << "</text>" << endl;
+ }
+ } else if ((!i) ? last_edge[i] : last_edge[i] == last_edge[i - 1])
+ last_edge[i] = 0;
+ }
+
+ svg << "</g>" << endl
+ << "<g transform='translate(-3,384) scale(2,-.5)'>" << endl
+ << "<path id='edges' d='";
+ for (unsigned i = 0; i < width; i++)
+ if (last_edge[i])
+ svg << " M" << ((double)last_edge[i] / ZBAR_FRAC) << ",0v768";
+ svg << "'/>" << endl
+ << "</g>" << endl
+ << "<g transform='translate(-1,384) scale(2,-.5)'>" << endl
+ << "<path id='y0' d='M";
+ for (unsigned i = 0; i < width; i++)
+ svg << ((i != 1) ? " " : " L ") << i << "," << y0[i];
+ svg << "'/>" << endl << "</g>" << endl;
+
+ svg << "<g transform='translate(-1,128) scale(2,-1)'>" << endl
+ << "<line id='zero' x2='" << width << "'/>" << endl
+ << "<path id='cur-edge' d='";
+ for (unsigned i = 1; i < width - 1; i++)
+ if (!last_edge[i + 1] && (cur_edge[i] != cur_edge[i + 1]))
+ svg << " M" << ((double)cur_edge[i] / ZBAR_FRAC) - 1 << ",-32v64";
+ svg << "'/>" << endl << "<path class='y1thr' d='M";
+ for (unsigned i = 0; i < width; i++)
+ svg << ((i != 1) ? " " : " L ") << i << "," << y1_thr[i];
+ svg << "'/>" << endl << "<path class='y1thr' d='M";
+ for (unsigned i = 0; i < width; i++)
+ svg << ((i != 1) ? " " : " L ") << i << "," << -y1_thr[i];
+ svg << "'/>" << endl << "<path id='y1' d='M";
+ for (unsigned i = 0; i < width; i++)
+ svg << ((i != 1) ? " " : " L ") << (i - 0.5) << "," << y1[i];
+ svg << "'/>" << endl << "<path id='y2' d='M";
+ for (unsigned i = 0; i < width; i++)
+ svg << ((i != 1) ? " " : " L ") << i << "," << y2[i];
+ svg << "'/>" << endl << "</g>" << endl;
+
+ svg << "</svg>" << endl;
+}
+
+int main(int argc, const char *argv[])
+{
+ if (argc < 2) {
+ cerr << "ERROR: specify image file(s) to scan" << endl;
+ return (1);
+ }
+
+ for (int i = 1; i < argc; i++)
+ scan_image(argv[i]);
+ return (0);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 06:53:58 +0000