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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.6/src/Font.cpp')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-1.6/src/Font.cpp | 668 |
1 files changed, 0 insertions, 668 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.6/src/Font.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.6/src/Font.cpp deleted file mode 100644 index a7f78e80427..00000000000 --- a/Build/source/texk/dvisvgm/dvisvgm-1.6/src/Font.cpp +++ /dev/null @@ -1,668 +0,0 @@ -/************************************************************************* -** Font.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 <cstdlib> -#include <iostream> -#include <fstream> -#include <sstream> -#include "CMap.h" -#include "FileFinder.h" -#include "FileSystem.h" -#include "Font.h" -#include "FontEncoding.h" -#include "FontEngine.h" -#include "GFGlyphTracer.h" -#include "Glyph.h" -#include "Message.h" -#include "MetafontWrapper.h" -#include "TFM.h" -#include "VFReader.h" -#include "SignalHandler.h" -#include "Subfont.h" -#include "SVGTree.h" -#include "macros.h" - - -using namespace std; - - -/** Returns true if 'unicode' is a valid unicode value in XML documents. - * XML version 1.0 doesn't allow various unicode character references - * ( for example). */ -static bool valid_unicode (UInt32 unicode) { - if ((unicode & 0xffff) == 0xfffe || (unicode & 0xffff) == 0xffff) - return false; - - UInt32 ranges[] = { - 0x0000, 0x0020, - 0x007f, 0x0084, - 0x0086, 0x009f, - 0x202a, 0x202e, // bidi control characters - 0xd800, 0xdfff, - 0xfdd0, 0xfdef, - }; - for (size_t i=0; i < sizeof(ranges)/sizeof(UInt32)/2; i++) - if (unicode >= ranges[2*i] && unicode <= ranges[2*i+1]) - return false; - return true; -} - - -UInt32 Font::unicode (UInt32 c) const { - // @@ this should be optimized :-) - return valid_unicode(c) ? c : 0x3400+c; -} - - -/** Returns the encoding object of this font which is asigned in a map file. - * If there's no encoding assigned, the function returns 0. */ -const FontEncoding* Font::encoding () const { - if (const FontMap::Entry *entry = fontMapEntry()) - return FontEncoding::encoding(entry->encname); - return 0; -} - - -const FontMap::Entry* Font::fontMapEntry () const { - string fontname = name(); - size_t pos = fontname.rfind('.'); - if (pos != string::npos) - fontname = fontname.substr(0, pos); // strip extension - return FontMap::instance().lookup(fontname); -} - - -/** Compute the extents of a given glyph. - * @param[in] c character code of glyph - * @param[in] vertical true if is glyph is part of vertical aligned text - * @param[out] metrics the resulting extents */ -void Font::getGlyphMetrics (int c, bool vertical, GlyphMetrics &metrics) const { - double s = scaleFactor(); - if (vertical) { // get metrics for vertical text flow? - if (verticalLayout()) { // is the font designed for vertical texts? - metrics.wl = s*charDepth(c); - metrics.wr = s*charHeight(c); - metrics.h = 0; - metrics.d = s*charWidth(c); - } - else { // rotate box by 90 degrees for alphabetic text - metrics.wl = s*charDepth(c); - metrics.wr = s*charHeight(c); - metrics.h = 0; - metrics.d = s*(charWidth(c)+italicCorr(c)); - } - } - else { - metrics.wl = 0; - metrics.wr = s*(charWidth(c)+italicCorr(c)); - metrics.h = s*charHeight(c); - metrics.d = s*charDepth(c); - } -} - - -/////////////////////////////////////////////////////////////////////////////////////// - -TFMFont::TFMFont (string name, UInt32 cs, double ds, double ss) - : _metrics(0), _fontname(name), _checksum(cs), _dsize(ds), _ssize(ss) -{ -} - - -TFMFont::~TFMFont () { - delete _metrics; -} - - -/** Returns a font metrics object for the current font. - * @throw FontException if TFM file can't be found */ -const FontMetrics* TFMFont::getMetrics () const { - if (!_metrics) { - try { - _metrics = FontMetrics::read(_fontname.c_str()); - if (!_metrics) { - _metrics = new NullFontMetric; - Message::wstream(true) << "can't find "+_fontname+".tfm\n"; - } - } - catch (FontMetricException &e) { - _metrics = new NullFontMetric; - Message::wstream(true) << e.what() << " in " << _fontname << ".tfm\n"; - } - } - return _metrics; -} - - -double TFMFont::charWidth (int c) const { - double w = getMetrics() ? getMetrics()->getCharWidth(c) : 0; - if (style()) { - w *= style()->extend; - w += fabs(style()->slant*charHeight(c)); // slant := tan(phi) = dx/height - } - return w; -} - - -double TFMFont::italicCorr (int c) const { - double w = getMetrics() ? getMetrics()->getItalicCorr(c) : 0; - if (style()) - w *= style()->extend; - return w; -} - - -double TFMFont::charDepth (int c) const {return getMetrics() ? getMetrics()->getCharDepth(c) : 0;} -double TFMFont::charHeight (int c) const {return getMetrics() ? getMetrics()->getCharHeight(c) : 0;} - - -/** Tests if the checksum of the font matches that of the corresponding TFM file. */ -bool TFMFont::verifyChecksums () const { - if (_checksum != 0 && getMetrics() && getMetrics()->getChecksum() != 0) - return _checksum == getMetrics()->getChecksum(); - return true; -} - -////////////////////////////////////////////////////////////////////////////// - -// static class variables -bool PhysicalFont::EXACT_BBOX = false; -bool PhysicalFont::KEEP_TEMP_FILES = false; -const char *PhysicalFont::CACHE_PATH = 0; -double PhysicalFont::METAFONT_MAG = 4; -FontCache PhysicalFont::_cache; - - -Font* PhysicalFont::create (string name, UInt32 checksum, double dsize, double ssize, PhysicalFont::Type type) { - return new PhysicalFontImpl(name, 0, checksum, dsize, ssize, type); -} - - -Font* PhysicalFont::create (string name, int fontindex, UInt32 checksum, double dsize, double ssize) { - return new PhysicalFontImpl(name, fontindex, checksum, dsize, ssize, PhysicalFont::TTC); -} - - -const char* PhysicalFont::path () const { - const char *ext=0; - switch (type()) { - case OTF: ext = "otf"; break; - case PFB: ext = "pfb"; break; - case TTC: ext = "ttc"; break; - case TTF: ext = "ttf"; break; - case MF : ext = "mf"; break; - default : ext = 0; - } - if (ext) - return FileFinder::lookup(name()+"."+ext); - return FileFinder::lookup(name()); -} - - -/** Returns true if this font is CID-based. */ -bool PhysicalFont::isCIDFont () const { - if (type() == MF) - return false; - FontEngine::instance().setFont(*this); - return FontEngine::instance().isCIDFont(); -} - - -/** Retrieve the IDs of all charachter maps available in the font file. - * @param[out] charMapIDs IDs of the found character maps - * @return number of found character maps */ -int PhysicalFont::collectCharMapIDs (std::vector<CharMapID> &charMapIDs) const { - if (type() == MF) - return 0; - FontEngine::instance().setFont(*this); - return FontEngine::instance().getCharMapIDs(charMapIDs); -} - - -/** Decodes a character code used in the DVI file to the code required to - * address the correct character in the font. - * @param[in] c DVI character to decode - * @return target character code or name */ -Character PhysicalFont::decodeChar (UInt32 c) const { - if (const FontEncoding *enc = encoding()) - return enc->decode(c); - return Character(Character::CHRCODE, c); -} - - -/** Returns the number of units per EM. The EM square is the virtual area a glyph is designed on. - * All coordinates used to specify portions of the glyph are relative to the origin (0,0) at the - * lower left corner of this square, while the upper right corner is located at (m,m), where m - * is an integer value defined with the font, and returned by this function. */ -int PhysicalFont::unitsPerEm() const { - if (type() == MF) - return 1000; - FontEngine::instance().setFont(*this); - return FontEngine::instance().getUnitsPerEM(); -} - - -int PhysicalFont::hAdvance () const { - if (type() == MF) - return 0; - FontEngine::instance().setFont(*this); - return FontEngine::instance().getHAdvance(); -} - - -double PhysicalFont::hAdvance (int c) const { - if (type() == MF) - return unitsPerEm()*charWidth(c)/designSize(); - FontEngine::instance().setFont(*this); - if (const FontMap::Entry *entry = fontMapEntry()) - if (Subfont *sf = entry->subfont) - c = sf->decode(c); - return FontEngine::instance().getHAdvance(decodeChar(c)); -} - - -double PhysicalFont::vAdvance (int c) const { - if (type() == MF) - return unitsPerEm()*charWidth(c)/designSize(); - FontEngine::instance().setFont(*this); - if (const FontMap::Entry *entry = fontMapEntry()) - if (Subfont *sf = entry->subfont) - c = sf->decode(c); - return FontEngine::instance().getVAdvance(decodeChar(c)); -} - - -string PhysicalFont::glyphName (int c) const { - if (type() == MF) - return ""; - FontEngine::instance().setFont(*this); - if (const FontMap::Entry *entry = fontMapEntry()) - if (Subfont *sf = entry->subfont) - c = sf->decode(c); - return FontEngine::instance().getGlyphName(decodeChar(c)); -} - - -double PhysicalFont::scaledAscent() const { - return ascent()*scaledSize()/unitsPerEm(); -} - - -int PhysicalFont::ascent () const { - if (type() == MF) - return 0; - FontEngine::instance().setFont(*this); - return FontEngine::instance().getAscender(); -} - - -int PhysicalFont::descent () const { - if (type() == MF) - return 0; - FontEngine::instance().setFont(*this); - return FontEngine::instance().getDescender(); -} - - -/** Extracts the glyph outlines of a given character. - * @param[in] c character code of requested glyph - * @param[out] glyph path segments of the glyph outline - * @param[in] cb optional callback object for tracer class - * @return true if outline could be computed */ -bool PhysicalFont::getGlyph (int c, GraphicPath<Int32> &glyph, GFGlyphTracer::Callback *cb) const { - if (type() == MF) { - const Glyph *cached_glyph=0; - if (CACHE_PATH) { - _cache.write(CACHE_PATH); - _cache.read(name().c_str(), CACHE_PATH); - cached_glyph = _cache.getGlyph(c); - } - if (cached_glyph) { - glyph = *cached_glyph; - return true; - } - else { - string gfname; - if (createGF(gfname)) { - try { - double ds = getMetrics() ? getMetrics()->getDesignSize() : 1; - GFGlyphTracer tracer(gfname, unitsPerEm()/ds, cb); - tracer.setGlyph(glyph); - tracer.executeChar(c); - glyph.closeOpenSubPaths(); - if (CACHE_PATH) - _cache.setGlyph(c, glyph); - return true; - } - catch (GFException &e) { - // @@ print error message - } - } - else { - Message::wstream(true) << "failed creating " << name() << ".gf\n"; - } - } - } - else { // vector fonts (OTF, PFB, TTF, TTC) - bool ok=true; - FontEngine::instance().setFont(*this); - if (const FontMap::Entry *entry = fontMapEntry()) - if (Subfont *sf = entry->subfont) - c = sf->decode(c); - ok = FontEngine::instance().traceOutline(decodeChar(c), glyph, false); - glyph.closeOpenSubPaths(); - return ok; - } - return false; -} - - -/** Creates a GF file for this font object. - * @param[out] gfname name of GF font file - * @return true on success */ -bool PhysicalFont::createGF (string &gfname) const { - SignalHandler::instance().check(); - gfname = name()+".gf"; - MetafontWrapper mf(name()); - bool ok = mf.make("ljfour", METAFONT_MAG); // call Metafont if necessary - return ok && mf.success() && getMetrics(); -} - - -/** Traces all glyphs of the current font and stores them in the cache. If caching is disabled, nothing happens. - * @param[in] includeCached if true, glyphs already cached are traced again - * @param[in] cb optional callback methods called by the tracer - * @return number of glyphs traced */ -int PhysicalFont::traceAllGlyphs (bool includeCached, GFGlyphTracer::Callback *cb) const { - int count = 0; - if (type() == MF && CACHE_PATH) { - if (const FontMetrics *metrics = getMetrics()) { - int fchar = metrics->firstChar(); - int lchar = metrics->lastChar(); - string gfname; - Glyph glyph; - if (createGF(gfname)) { - _cache.read(name().c_str(), CACHE_PATH); - double ds = getMetrics() ? getMetrics()->getDesignSize() : 1; - GFGlyphTracer tracer(gfname, unitsPerEm()/ds, cb); - tracer.setGlyph(glyph); - for (int i=fchar; i <= lchar; i++) { - if (includeCached || !_cache.getGlyph(i)) { - glyph.newpath(); - tracer.executeChar(i); - glyph.closeOpenSubPaths(); - _cache.setGlyph(i, glyph); - ++count; - } - } - _cache.write(CACHE_PATH); - } - } - } - return count; -} - - -/** Computes the exact bounding box of a glyph. - * @param[in] c character code of the glyph - * @param[out] bbox the computed bounding box - * @param[in] cb optional calback object forwarded to the tracer - * @return true if the box could be computed successfully */ -bool PhysicalFont::getExactGlyphBox(int c, BoundingBox& bbox, GFGlyphTracer::Callback* cb) const { - Glyph glyph; - if (getGlyph(c, glyph, cb)) { - glyph.computeBBox(bbox); - double s = scaledSize()/unitsPerEm(); - bbox.scale(s, s); - return true; - } - return false; -} - - -bool PhysicalFont::getExactGlyphBox (int c, GlyphMetrics &metrics, bool vertical, GFGlyphTracer::Callback *cb) const { - BoundingBox charbox; - if (!getExactGlyphBox(c, charbox, cb)) - return false; - if ((metrics.wl = -charbox.minX()) < 0) metrics.wl=0; - if ((metrics.wr = charbox.maxX()) < 0) metrics.wr=0; - if ((metrics.h = charbox.maxY()) < 0) metrics.h=0; - if ((metrics.d = -charbox.minY()) < 0) metrics.d=0; - if (vertical) { // vertical text orientation - if (verticalLayout()) { // font designed for vertical layout? - metrics.wl = metrics.wr = (metrics.wl+metrics.wr)/2; - metrics.d += metrics.h; - metrics.h = 0; - } - else { - double depth = metrics.d; - metrics.d = metrics.wr; - metrics.wr = metrics.h; - metrics.h = metrics.wl; - metrics.wl = depth; - } - } - return true; -} - - -Font* VirtualFont::create (string name, UInt32 checksum, double dsize, double ssize) { - return new VirtualFontImpl(name, checksum, dsize, ssize); -} - - -////////////////////////////////////////////////////////////////////////////// - - -PhysicalFontImpl::PhysicalFontImpl (string name, int fontindex, UInt32 cs, double ds, double ss, PhysicalFont::Type type) - : TFMFont(name, cs, ds, ss), - _filetype(type), _fontIndex(fontindex), _fontMapEntry(Font::fontMapEntry()), _encodingPair(Font::encoding()), _localCharMap(0) -{ -} - - -PhysicalFontImpl::~PhysicalFontImpl () { - if (CACHE_PATH) - _cache.write(CACHE_PATH); - if (!KEEP_TEMP_FILES) - tidy(); - delete _localCharMap; -} - - -const FontEncoding* PhysicalFontImpl::encoding () const { - if (!_encodingPair.enc1()) - return 0; - return &_encodingPair; -} - - -bool PhysicalFontImpl::findAndAssignBaseFontMap () { - const FontEncoding *enc = encoding(); - if (enc && enc->mapsToCharIndex()) { - // try to find a base font map that maps from character indexes to a suitable - // target encoding supported by the font file - if (const FontEncoding *bfmap = enc->findCompatibleBaseFontMap(this, _charmapID)) - _encodingPair.assign(bfmap); - else - return false; - } - else if (type() != MF) { - FontEngine::instance().setFont(*this); - if ((_localCharMap = FontEngine::instance().createCustomToUnicodeMap()) != 0) - _charmapID = FontEngine::instance().setCustomCharMap(); - else - _charmapID = FontEngine::instance().setUnicodeCharMap(); - } - return true; -} - - -UInt32 PhysicalFontImpl::unicode (UInt32 c) const { - if (type() == MF) - return Font::unicode(c); - Character chr = decodeChar(c); - if (chr.type() == Character::NAME || chr.number() == 0) - return Font::unicode(c); - - if (_localCharMap) { - if (UInt32 mapped_char = (*_localCharMap)[chr.number()]) - return mapped_char; - // No unicode equivalent found in font file. - // Now we should look for a smart alternative but at the moment - // it's sufficient to simply choose a valid unused unicode value... - // Can we use the charcode itself as a unicode replacement? - if (!_localCharMap->valueExists(chr.number()) && valid_unicode(chr.number())) - return chr.number(); - } - if (valid_unicode(chr.number())) - return chr.number(); - return Font::unicode(chr.number()); -} - - -/** Delete all temporary font files created by Metafont. */ -void PhysicalFontImpl::tidy () const { - if (type() == MF) { - const char *ext[] = {"gf", "tfm", "log", 0}; - for (const char **p=ext; *p; ++p) { - if (FileSystem::exists((name()+"."+(*p)).c_str())) - FileSystem::remove(name()+"."+(*p)); - } - } -} - -////////////////////////////////////////////////////////////////////////////// - -string NativeFont::uniqueName (const string &path, const FontStyle &style) { - static map<string, int> ids; - ostringstream oss; - oss << path << "b" << style.bold << "e" << style.extend << "s" << style.slant; - map<string, int>::iterator it = ids.find(oss.str()); - int id = ids.size(); - if (it == ids.end()) - ids[oss.str()] = id; - else - id = it->second; - oss.str(""); - oss << "nf" << id; - return oss.str(); -} - - -string NativeFont::name () const { - return uniqueName(path(), _style); -} - - -PhysicalFont::Type NativeFont::type () const { - if (const char *filepath = path()) { - if (const char *p =strrchr(filepath, '.')) { - string ext = p+1; - if (ext == "otf") - return PhysicalFont::OTF; - if (ext == "ttf") - return PhysicalFont::TTF; - if (ext == "pfb") - return PhysicalFont::PFB; - } - } - return PhysicalFont::UNKNOWN; -} - - -double NativeFont::charWidth (int c) const { - FontEngine::instance().setFont(*this); - int upem = FontEngine::instance().getUnitsPerEM(); - double w = upem ? (scaledSize()*FontEngine::instance().getAdvance(c)/upem*_style.extend) : 0; - w += fabs(_style.slant*charHeight(c)); - return w; -} - - -double NativeFont::charHeight (int c) const { - FontEngine::instance().setFont(*this); - int upem = FontEngine::instance().getUnitsPerEM(); - return upem ? (scaledSize()*FontEngine::instance().getAscender()/upem) : 0; -} - - -double NativeFont::charDepth (int c) const { - FontEngine::instance().setFont(*this); - int upem = FontEngine::instance().getUnitsPerEM(); - return upem ? (-scaledSize()*FontEngine::instance().getDescender()/upem) : 0; -} - - -UInt32 NativeFont::unicode (UInt32 c) const { - UInt32 ucode = decodeChar(c).number(); - return valid_unicode(ucode) ? ucode : 0x3400+ucode; -} - - -bool NativeFontImpl::findAndAssignBaseFontMap () { - FontEngine &fe = FontEngine::instance(); - fe.setFont(*this); - fe.buildCharMap(true, _toUnicodeMap); - _charmapID = fe.setUnicodeCharMap(); - return true; -} - - -Character NativeFontImpl::decodeChar (UInt32 c) const { - return Character(Character::CHRCODE, _toUnicodeMap[c]); -} - -////////////////////////////////////////////////////////////////////////////// - -VirtualFontImpl::VirtualFontImpl (string name, UInt32 cs, double ds, double ss) - : TFMFont(name, cs, ds, ss) -{ -} - - -VirtualFontImpl::~VirtualFontImpl () { - // delete dvi vectors received by VFReaderAction - for (map<UInt32, DVIVector*>::iterator i=_charDefs.begin(); i != _charDefs.end(); ++i) - delete i->second; -} - - -const char* VirtualFontImpl::path () const { - return FileFinder::lookup(name()+".vf"); -} - - -void VirtualFontImpl::assignChar (UInt32 c, DVIVector *dvi) { - if (dvi) { - if (_charDefs.find(c) == _charDefs.end()) - _charDefs[c] = dvi; - else - delete dvi; - } -} - - -const vector<UInt8>* VirtualFontImpl::getDVI (int c) const { - map<UInt32,DVIVector*>::const_iterator it = _charDefs.find(c); - return (it == _charDefs.end() ? 0 : it->second); -} - |