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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.cpp | 99 |
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); +} |