summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvisvgm/dvisvgm-1.8/src/JFM.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.8/src/JFM.cpp')
-rw-r--r--Build/source/texk/dvisvgm/dvisvgm-1.8/src/JFM.cpp99
1 files changed, 99 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.8/src/JFM.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.8/src/JFM.cpp
new file mode 100644
index 00000000000..89c4796616c
--- /dev/null
+++ b/Build/source/texk/dvisvgm/dvisvgm-1.8/src/JFM.cpp
@@ -0,0 +1,99 @@
+/*************************************************************************
+** JFM.cpp **
+** **
+** This file is part of dvisvgm -- the DVI to SVG converter **
+** Copyright (C) 2005-2014 Martin Gieseking <martin.gieseking@uos.de> **
+** **
+** This program is free software; you can redistribute it and/or **
+** modify it under the terms of the GNU General Public License as **
+** published by the Free Software Foundation; either version 3 of **
+** the License, or (at your option) any later version. **
+** **
+** This program 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 General Public License for more details. **
+** **
+** You should have received a copy of the GNU General Public License **
+** along with this program; if not, see <http://www.gnu.org/licenses/>. **
+*************************************************************************/
+
+#include <config.h>
+#include <algorithm>
+#include <cstring>
+#include <fstream>
+#include <sstream>
+#include "JFM.h"
+#include "StreamReader.h"
+
+using namespace std;
+
+
+JFM::JFM (istream &is) {
+ is.seekg(0);
+ StreamReader sr(is);
+ UInt16 id = UInt16(sr.readUnsigned(2)); // JFM ID (9 or 11)
+ if (id != 9 && id != 11) {
+ ostringstream oss;
+ oss << "invalid JFM identifier " << id << " (9 or 11 expected)";
+ throw FontMetricException(oss.str());
+ }
+ _vertical = (id == 9);
+ UInt16 nt = UInt16(sr.readUnsigned(2)); // length of character type table
+ UInt16 lf = UInt16(sr.readUnsigned(2)); // length of entire file in 4 byte words
+ UInt16 lh = UInt16(sr.readUnsigned(2)); // length of header in 4 byte words
+ UInt16 bc = UInt16(sr.readUnsigned(2)); // smallest character code in font
+ UInt16 ec = UInt16(sr.readUnsigned(2)); // largest character code in font
+ UInt16 nw = UInt16(sr.readUnsigned(2)); // number of words in width table
+ UInt16 nh = UInt16(sr.readUnsigned(2)); // number of words in height table
+ UInt16 nd = UInt16(sr.readUnsigned(2)); // number of words in depth table
+ UInt16 ni = UInt16(sr.readUnsigned(2)); // number of words in italic corr. table
+ UInt16 nl = UInt16(sr.readUnsigned(2)); // number of words in glue/kern table
+ UInt16 nk = UInt16(sr.readUnsigned(2)); // number of words in kern table
+ UInt16 ng = UInt16(sr.readUnsigned(2)); // number of words in glue table
+ UInt16 np = UInt16(sr.readUnsigned(2)); // number of font parameter words
+
+ if (7+nt+lh+(ec-bc+1)+nw+nh+nd+ni+nl+nk+ng+np != lf)
+ throw FontMetricException("inconsistent length values");
+
+ setCharRange(bc, ec);
+ readHeader(sr);
+ is.seekg(28+lh*4);
+ readTables(sr, nt, nw, nh, nd, ni);
+}
+
+
+void JFM::readTables (StreamReader &sr, int nt, int nw, int nh, int nd, int ni) {
+ // determine smallest charcode with chartype > 0
+ UInt16 minchar=0xFFFF, maxchar=0;
+ for (int i=0; i < nt; i++) {
+ UInt16 c = (UInt16)sr.readUnsigned(2);
+ UInt16 t = (UInt16)sr.readUnsigned(2);
+ if (t > 0) {
+ minchar = min(minchar, c);
+ maxchar = max(maxchar, c);
+ }
+ }
+ // build charcode to chartype map
+ if (minchar <= maxchar) {
+ _minchar = minchar;
+ _charTypeTable.resize(maxchar-minchar+1);
+ memset(&_charTypeTable[0], 0, nt*sizeof(UInt16));
+ sr.seek(-nt*4, ios::cur);
+ for (int i=0; i < nt; i++) {
+ UInt16 c = (UInt16)sr.readUnsigned(2);
+ UInt16 t = (UInt16)sr.readUnsigned(2);
+ if (c >= minchar)
+ _charTypeTable[c-minchar] = t;
+ }
+ }
+ TFM::readTables(sr, nw, nh, nd, ni);
+}
+
+
+int JFM::charIndex (int c) const {
+ UInt16 chartype = 0;
+ if (!_charTypeTable.empty() && c >= _minchar && size_t(c) < _minchar+_charTypeTable.size())
+ chartype = _charTypeTable[c-_minchar];
+ return TFM::charIndex(chartype);
+}