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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.0.9/src/DVIReader.cpp')
| -rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-1.0.9/src/DVIReader.cpp | 680 |
1 files changed, 680 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.0.9/src/DVIReader.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.0.9/src/DVIReader.cpp new file mode 100644 index 00000000000..b4ba8bc00d6 --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-1.0.9/src/DVIReader.cpp @@ -0,0 +1,680 @@ +/************************************************************************* +** DVIReader.cpp ** +** ** +** This file is part of dvisvgm -- the DVI to SVG converter ** +** Copyright (C) 2005-2011 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 <cstdarg> +#include <fstream> +#include <iostream> +#include <sstream> +#include "types.h" +#include "DVIActions.h" +#include "DVIReader.h" +#include "Font.h" +#include "FontManager.h" +#include "Message.h" +#include "SignalHandler.h" +#include "VectorStream.h" +#include "macros.h" + +using namespace std; + +bool DVIReader::COMPUTE_PAGE_LENGTH = false; + + +DVIReader::DVIReader (istream &is, DVIActions *a) : StreamReader(is), _actions(a) +{ + _inPage = false; + _pageHeight = _pageWidth = 0; + _scaleFactor = 0.0; + _tx = _ty = 0; // no cursor translation + _prevYPos = numeric_limits<double>::min(); + _inPostamble = false; + _totalPages = 0; // we don't know the correct value yet + _currFontNum = 0; + _currPageNum = 0; + _pageLength = 0; + _pagePos = 0; +} + + +DVIActions* DVIReader::replaceActions (DVIActions *a) { + DVIActions *prev_actions = _actions; + _actions = a; + return prev_actions; +} + + +/** Evaluates the next DVI command, and computes the corresponding handler. + * @param[in] compute_size if true, the size of variable-length parameters is computed + * @param[out] handler handler for current DVI command + * @param[out] number of parameter bytes + * @param[out] param the handler must be called with this parameter + * @return opcode of current DVI command */ +int DVIReader::evalCommand (bool compute_size, CommandHandler &handler, int &length, int ¶m) { + struct DVICommand { + CommandHandler handler; + int length; // number of parameter bytes + }; + + /* Each cmdFOO command reads the necessary number of bytes from the stream, so executeCommand + doesn't need to know the exact DVI command format. Some cmdFOO methods are used for multiple + DVI commands because they only differ in length of their parameters. */ + static const DVICommand commands[] = { + {&DVIReader::cmdSetChar, 1}, {&DVIReader::cmdSetChar, 2}, {&DVIReader::cmdSetChar, 3}, {&DVIReader::cmdSetChar, 4}, // 128-131 + {&DVIReader::cmdSetRule, 8}, // 132 + {&DVIReader::cmdPutChar, 1}, {&DVIReader::cmdPutChar, 2}, {&DVIReader::cmdPutChar, 3}, {&DVIReader::cmdPutChar, 4}, // 133-136 + {&DVIReader::cmdPutRule, 8}, // 137 + {&DVIReader::cmdNop, 0}, // 138 + {&DVIReader::cmdBop, 44}, {&DVIReader::cmdEop, 0}, // 139-140 + {&DVIReader::cmdPush, 0}, {&DVIReader::cmdPop, 0}, // 141-142 + {&DVIReader::cmdRight, 1}, {&DVIReader::cmdRight, 2}, {&DVIReader::cmdRight, 3}, {&DVIReader::cmdRight, 4}, // 143-146 + {&DVIReader::cmdW0, 0}, // 147 + {&DVIReader::cmdW, 1}, {&DVIReader::cmdW, 2}, {&DVIReader::cmdW, 3}, {&DVIReader::cmdW, 4}, // 148-151 + {&DVIReader::cmdX0, 0}, // 152 + {&DVIReader::cmdX, 1}, {&DVIReader::cmdX, 2}, {&DVIReader::cmdX, 3}, {&DVIReader::cmdX, 4}, // 153-156 + {&DVIReader::cmdDown, 1}, {&DVIReader::cmdDown, 2}, {&DVIReader::cmdDown, 3}, {&DVIReader::cmdDown, 4}, // 157-160 + {&DVIReader::cmdY0, 0}, // 161 + {&DVIReader::cmdY, 1}, {&DVIReader::cmdY, 2}, {&DVIReader::cmdY, 3}, {&DVIReader::cmdY, 4}, // 162-165 + {&DVIReader::cmdZ0, 0}, // 166 + {&DVIReader::cmdZ, 1}, {&DVIReader::cmdZ, 2}, {&DVIReader::cmdZ, 3}, {&DVIReader::cmdZ, 4}, // 167-170 + {&DVIReader::cmdFontNum, 1}, {&DVIReader::cmdFontNum, 2}, {&DVIReader::cmdFontNum, 3}, {&DVIReader::cmdFontNum, 4}, // 235-238 + {&DVIReader::cmdXXX, 1}, {&DVIReader::cmdXXX, 2}, {&DVIReader::cmdXXX, 3}, {&DVIReader::cmdXXX, 4}, // 239-242 + {&DVIReader::cmdFontDef, 1}, {&DVIReader::cmdFontDef, 2}, {&DVIReader::cmdFontDef, 3}, {&DVIReader::cmdFontDef, 4}, // 243-246 + {&DVIReader::cmdPre, 0}, {&DVIReader::cmdPost, 0}, {&DVIReader::cmdPostPost, 0} // 247-249 + }; + + const int opcode = in().get(); + if (!in() || opcode < 0) // at end of file + throw InvalidDVIFileException("invalid file"); + + param = -1; + if (opcode >= 0 && opcode <= 127) { + handler = &DVIReader::cmdSetChar0; + length = 0; + param = opcode; + } + else if (opcode >= 171 && opcode <= 234) { + handler = &DVIReader::cmdFontNum0; + length = 0; + param = opcode-171; + } + else if (opcode >= 250) { + ostringstream oss; + oss << "undefined DVI command (opcode " << opcode << ')'; + throw DVIException(oss.str()); + } + else { + const int offset = opcode <= 170 ? 128 : 235-(170-128+1); + handler = commands[opcode-offset].handler; + if (!compute_size) + length = commands[opcode-offset].length; + else { + if (opcode >= 239 && opcode <= 242) { // specials + int len = opcode-238; + UInt32 bytes = readUnsigned(len); + in().seekg(-len, ios_base::cur); + length = len+bytes; + } + else if (opcode >= 243 && opcode <= 246) { // fontdefs + int len = opcode-242; + len += 12; + in().seekg(len, ios_base::cur); // skip fontnum, checksum, ssize, dsize + UInt32 bytes = readUnsigned(1); // length of font path + bytes += readUnsigned(1); // length of font name + in().seekg(-len-2, ios_base::cur); + length = len+bytes; + } + else + length = commands[opcode-offset].length; + } + } + if (param < 0) + param = length; + return opcode; +} + + +/** Reads a single DVI command from the current position of the input stream and calls the + * corresponding cmdFOO method. + * @return opcode of the executed command */ +int DVIReader::executeCommand () { + SignalHandler::instance().check(); + CommandHandler handler; + int len; // number of parameter bytes + int param; // parameter of handler + streampos pos = in().tellg(); + int opcode = evalCommand(false, handler, len, param); + (this->*handler)(param); + if (_currPos.v+_ty != _prevYPos) { + _tx = _ty = 0; + _prevYPos = _currPos.v; + } + if (COMPUTE_PAGE_LENGTH && _inPage && _actions) { + // ensure progress() is called at 0% + if (opcode == 139) // bop? + _actions->progress(0, _pageLength); + // ensure progress() is called at 100% + if (in().peek() == 140) // eop reached? + _pagePos = _pageLength; + else + _pagePos += in().tellg()-pos; + _actions->progress(_pagePos, _pageLength); + } + return opcode; +} + + +/** Executes all DVI commands read from the input stream. */ +void DVIReader::executeAll () { + int opcode = 0; + while (!in().eof() && opcode >= 0) { + try { + opcode = executeCommand(); + } + catch (const InvalidDVIFileException &e) { + // end of stream reached + opcode = -1; + } + } +} + + +#if 0 +/** Executes all DVI commands from the preamble to postpost. */ +bool DVIReader::executeDocument () { + in().clear(); // reset all status bits + if (!in()) + return false; + in().seekg(0); // move file pointer to first byte of the input stream + while (!in().eof() && executeCommand() != 249); // stop reading after postpost (249) + return true; +} + +bool DVIReader::executeAllPages () { + in().clear(); // reset all status bits + if (!in()) + return false; + in().seekg(0); // move file pointer to first byte of the input stream + while (!in().eof() && executeCommand() != 248); // stop reading when postamble (248) is reached + return true; +} +#endif + + +/** Reads and executes the commands of a single page. + * This methods stops reading after the page's eop command has been executed. + * @param[in] n number of page to be executed + * @returns true if page was read successfully */ +bool DVIReader::executePage (unsigned n) { + in().clear(); // reset all status bits + if (!in()) + throw DVIException("invalid DVI file"); + in().seekg(-1, ios_base::end); // stream pointer to last byte + while (in().peek() == 223) + in().seekg(-1, ios_base::cur); // skip fill bytes + in().seekg(-4, ios_base::cur); // now on first byte of q (pointer to begin of postamble) + UInt32 q = readUnsigned(4); // pointer to begin of postamble + in().seekg(q, ios_base::beg); // now on begin of postamble + if (executeCommand() != 248) // execute postamble command but not the fontdefs + return false; + if (n < 1 || n > _totalPages) + return false; + in().seekg(_prevBop, ios_base::beg); // now on last bop + _inPostamble = false; // we jumped out of the postamble + unsigned pageCount = _totalPages; + for (; pageCount > n && _prevBop > 0; pageCount--) { + in().seekg(41, ios_base::cur); // skip bop and 10*4 \count bytes => now on pointer to prev bop + _prevBop = readSigned(4); + in().seekg(_prevBop, ios_base::beg); + } + _currPageNum = n; + while (pageCount == n && executeCommand() != 140); // 140 == eop + return true; +} + + +bool DVIReader::executePages (unsigned first, unsigned last) { + in().clear(); + if (!in()) + throw DVIException("invalid DVI file"); + if (first > last) + swap(first, last); + in().seekg(-1, ios_base::end); // stream pointer to last byte + while (in().peek() == 223) + in().seekg(-1, ios_base::cur); // skip fill bytes + in().seekg(-4, ios_base::cur); // now on first byte of q (pointer to begin of postamble) + UInt32 q = readUnsigned(4); // pointer to begin of postamble + in().seekg(q, ios_base::beg); // now on begin of postamble + if (executeCommand() != 248) // execute postamble command but not the fontdefs + return false; + first = max(1u, min(first, _totalPages)); + last = max(1u, min(last, _totalPages)); + in().seekg(_prevBop, ios_base::beg); // now on last bop + _inPostamble = false; // we jumped out of the postamble + unsigned count = _totalPages; + for (; count > first && _prevBop > 0; count--) { + in().seekg(41, ios_base::cur); // skip bop and 10*4 \count bytes => now on pointer to prev bop + _prevBop = readSigned(4); + in().seekg(_prevBop, ios_base::beg); + } + while (first <= last) { + _currPageNum = first++; + while (executeCommand () != 140); // 140 == eop + } + return true; +} + + +void DVIReader::executePreamble () { + in().clear(); + if (!in()) + throw DVIException("invalid DVI file"); + in().seekg(0, ios_base::beg); + if (in().get() != 247) + throw DVIException("invalid DVI file"); + cmdPre(0); +} + + +/** Reads and executes the commands of the postamble. */ +void DVIReader::executePostamble () { + in().clear(); // reset all status bits + if (!in()) + throw DVIException("invalid DVI file"); + in().seekg(-1, ios_base::end); // stream pointer to last byte + while (in().peek() == 223) + in().seekg(-1, ios_base::cur); // skip fill bytes + + in().seekg(-4, ios_base::cur); // now on first byte of q (pointer to begin of postamble) + UInt32 q = readUnsigned(4); // pointer to begin of postamble + in().seekg(q, ios_base::beg); // now on begin of postamble + while (executeCommand() != 249); // read all commands until postpost (= 249) is reached +} + + +/** Returns the current x coordinate in TeX point units. + * This is the horizontal position where the next output would be placed. */ +double DVIReader::getXPos () const { + return _currPos.h+_tx; +} + + +/** Returns the current y coordinate in TeX point units. + * This is the vertical position where the next output would be placed. */ +double DVIReader::getYPos () const { + return _currPos.v+_ty; +} + + +double DVIReader::getPageHeight () const { + return _pageHeight; +} + + +double DVIReader::getPageWidth () const { + return _pageWidth; +} + +///////////////////////////////////// + +/** Reads and executes DVI preamble command. */ +void DVIReader::cmdPre (int) { + UInt32 i = readUnsigned(1); // identification number (should be 2) + UInt32 num = readUnsigned(4); // numerator units of measurement + UInt32 den = readUnsigned(4); // denominator units of measurement + _mag = readUnsigned(4); // magnification + UInt32 k = readUnsigned(1); // length of following comment + string cmt = readString(k); // comment + if (i != 2) { + ostringstream oss; + oss << "DVI format version " << i << " not supported"; + throw DVIException(oss.str()); + } + // 1 dviunit * num/den == multiples of 0.0000001m + // 1 dviunit * _scaleFactor: length of 1 dviunit in TeX points * _mag/1000 + _scaleFactor = num/25400000.0*7227.0/den*_mag/1000.0; + if (_actions) + _actions->preamble(cmt); +} + + +/** Reads and executes DVI postamble command. */ +void DVIReader::cmdPost (int) { + _prevBop = readUnsigned(4); // pointer to previous bop + UInt32 num = readUnsigned(4); + UInt32 den = readUnsigned(4); + _mag = readUnsigned(4); + _pageHeight = readUnsigned(4); // height of tallest page in dvi units + _pageWidth = readUnsigned(4); // width of widest page in dvi units + readUnsigned(2); // max. stack depth + _totalPages = readUnsigned(2); // total number of pages + // 1 dviunit * num/den == multiples of 0.0000001m + // 1 dviunit * _scaleFactor: length of 1 dviunit in TeX points * _mag/1000 + _scaleFactor = num/25400000.0*7227.0/den*_mag/1000.0; + _pageHeight *= _scaleFactor; // to pt units + _pageWidth *= _scaleFactor; + _inPostamble = true; + if (_actions) + _actions->postamble(); +} + + +/** Reads and executes DVI postpost command. */ +void DVIReader::cmdPostPost (int) { + _inPostamble = false; + readUnsigned(4); // pointer to begin of postamble + UInt32 i = readUnsigned(1); // identification byte (should be 2) + if (i == 2) + while (readUnsigned(1) == 223); // skip fill bytes (223), eof bit should be set now + else + throw DVIException("invalid identification value in postpost"); +} + + +/** Reads and executes Begin-Of-Page command. */ +void DVIReader::cmdBop (int) { + Int32 c[10]; + for (int i=0; i < 10; i++) + c[i] = readSigned(4); + readSigned(4); // pointer to peceeding bop (-1 in case of first page) + _currPos.reset(); // set all DVI registers to 0 + while (!_posStack.empty()) + _posStack.pop(); + _currFontNum = 0; + _inPage = true; + _pageLength = 0; + _pagePos = 0; + if (COMPUTE_PAGE_LENGTH) { + // compute number of bytes in current page + int length, param; + CommandHandler handler; + // read all commands until eop is found + while (evalCommand(true, handler, length, param) != 140) { + in().seekg(length, ios_base::cur); + _pageLength += length+1; // parameter length + opcode length (1 byte) + } + ++_pageLength; // add length of eop command (1 byte) + in().seekg(-int(_pageLength), ios_base::cur); // go back to first command following bop + _pageLength += 45; // add length of bop command + } + beginPage(_currPageNum, c); + if (_actions) + _actions->beginPage(_currPageNum, c); +} + + +/** Reads and executes End-Of-Page command. */ +void DVIReader::cmdEop (int) { + if (!_posStack.empty()) + throw DVIException("stack not empty at end of page"); + _inPage = false; + endPage(); + if (_actions) + _actions->endPage(); +} + + +/** Reads and executes push command. */ +void DVIReader::cmdPush (int) { + _posStack.push(_currPos); +} + + +/** Reads and executes pop command (restores pushed position information). */ +void DVIReader::cmdPop (int) { + if (_posStack.empty()) + throw DVIException("stack empty at pop command"); + else { + DVIPosition prevPos = _currPos; + _currPos = _posStack.top(); + _posStack.pop(); + if (_actions) { + if (prevPos.h != _currPos.h) + _actions->moveToX(_currPos.h + _tx); + if (prevPos.v != _currPos.v) + _actions->moveToY(_currPos.v + _ty); + } + } +} + + +/** Helper function that actually sets/puts a charater. It is called by the + * cmdSetChar and cmdPutChar methods. + * @param[in] c character to typeset + * @param[in] moveCursor if true, register h is increased by the character width + * @throw DVIException if method is called ouside a bop/eop pair */ +void DVIReader::putChar (UInt32 c, bool moveCursor) { + if (!_inPage) + throw DVIException("set_char or put_char outside of page"); + + FontManager &fm = FontManager::instance(); + Font *font = fm.getFont(_currFontNum); + if (!font) + throw DVIException("no font selected"); + + if (VirtualFont *vf = dynamic_cast<VirtualFont*>(font)) { // is current font a virtual font? + vector<UInt8> *dvi = const_cast<vector<UInt8>*>(vf->getDVI(c)); // get DVI snippet that describes character c + if (dvi) { + DVIPosition pos = _currPos; // save current cursor position + _currPos.x = _currPos.y = _currPos.w = _currPos.z = 0; + int save_fontnum = _currFontNum; // save current font number + fm.enterVF(vf); // new font number context + cmdFontNum0(fm.vfFirstFontNum(vf)); + double save_scale = _scaleFactor; + _scaleFactor = vf->scaledSize()/(1 << 20); + + VectorInputStream<UInt8> vis(*dvi); + istream &is = replaceStream(vis); + try { + executeAll(); // execute DVI fragment + } + catch (const DVIException &e) { + // Message::estream(true) << "invalid dvi in vf: " << e.getMessage() << endl; // @@ + } + replaceStream(is); // restore previous input stream + _scaleFactor = save_scale; // restore previous scale factor + fm.leaveVF(); // restore previous font number context + cmdFontNum0(save_fontnum); // restore previous font number + _currPos = pos; // restore previous cursor position + } + } + else if (_actions) { + _actions->setChar(_currPos.h+_tx, _currPos.v+_ty, c, font); + } + if (moveCursor) + _currPos.h += font->charWidth(c) * font->scaleFactor() * _mag/1000.0; +} + + +/** Reads and executes set_char_x command. Puts a character at the current + * position and advances the cursor. + * @param[in] c character to set + * @throw DVIException if method is called ouside a bop/eop pair */ +void DVIReader::cmdSetChar0 (int c) { + putChar(c, true); +} + + +/** Reads and executes setx command. Puts a character at the current + * position and advances the cursor. + * @param[in] len number of parameter bytes (possible values: 1-4) + * @throw DVIException if method is called ouside a bop/eop pair */ +void DVIReader::cmdSetChar (int len) { + // According to the dvi specification all character codes are unsigned + // except len == 4. At the moment all char codes are treated as unsigned... + UInt32 c = readUnsigned(len); // if len == 4 c may be signed + putChar(c, true); +} + + +/** Reads and executes putx command. Puts a character at the current + * position but doesn't change the cursor position. + * @param[in] len number of parameter bytes (possible values: 1-4) + * @throw DVIException if method is called ouside a bop/eop pair */ +void DVIReader::cmdPutChar (int len) { + // According to the dvi specification all character codes are unsigned + // except len == 4. At the moment all char codes are treated as unsigned... + Int32 c = readUnsigned(len); + putChar(c, false); +} + + +/** Reads and executes set_rule command. Puts a solid rectangle at the current + * position and updates the cursor position. + * @throw DVIException if method is called ouside a bop/eop pair */ +void DVIReader::cmdSetRule (int) { + if (_inPage) { + double height = _scaleFactor*readSigned(4); + double width = _scaleFactor*readSigned(4); + if (_actions && height > 0 && width > 0) + _actions->setRule(_currPos.h+_tx, _currPos.v+_ty, height, width); + _currPos.h += width; + if (_actions && (height <= 0 || width <= 0)) + _actions->moveToX(_currPos.h+_tx); + } + else + throw DVIException("set_rule outside of page"); +} + + +/** Reads and executes set_rule command. Puts a solid rectangle at the current + * position but leaves the cursor position unchanged. + * @throw DVIException if method is called ouside a bop/eop pair */ +void DVIReader::cmdPutRule (int) { + if (_inPage) { + double height = _scaleFactor*readSigned(4); + double width = _scaleFactor*readSigned(4); + if (_actions && height > 0 && width > 0) + _actions->setRule(_currPos.h+_tx, _currPos.v+_ty, height, width); + } + else + throw DVIException("put_rule outside of page"); +} + + +void DVIReader::cmdNop (int) {} + +void DVIReader::cmdRight (int len) {_currPos.h += _scaleFactor*readSigned(len); if (_actions) _actions->moveToX(_currPos.h+_tx);} +void DVIReader::cmdDown (int len) {_currPos.v += _scaleFactor*readSigned(len); if (_actions) _actions->moveToY(_currPos.v+_ty);} +void DVIReader::cmdX0 (int) {_currPos.h += _currPos.x; if (_actions) _actions->moveToX(_currPos.h+_tx);} +void DVIReader::cmdY0 (int) {_currPos.v += _currPos.y; if (_actions) _actions->moveToY(_currPos.v+_ty);} +void DVIReader::cmdW0 (int) {_currPos.h += _currPos.w; if (_actions) _actions->moveToX(_currPos.h+_tx);} +void DVIReader::cmdZ0 (int) {_currPos.v += _currPos.z; if (_actions) _actions->moveToY(_currPos.v+_ty);} +void DVIReader::cmdX (int len) {_currPos.x = _scaleFactor*readSigned(len); cmdX0(0);} +void DVIReader::cmdY (int len) {_currPos.y = _scaleFactor*readSigned(len); cmdY0(0);} +void DVIReader::cmdW (int len) {_currPos.w = _scaleFactor*readSigned(len); cmdW0(0);} +void DVIReader::cmdZ (int len) {_currPos.z = _scaleFactor*readSigned(len); cmdZ0(0);} + + +void DVIReader::cmdXXX (int len) { + if (_inPage) { + UInt32 numBytes = readUnsigned(len); + string s = readString(numBytes); + if (_actions) + _actions->special(s); + } + else + throw DVIException("special outside of page"); +} + + +/** Selects a previously defined font by its number. + * @param[in] num font number + * @throw DVIException if font number is undefined */ +void DVIReader::cmdFontNum0 (int num) { + if (Font *font = FontManager::instance().getFont(num)) { + _currFontNum = num; + if (_actions && !dynamic_cast<VirtualFont*>(font)) + _actions->setFont(FontManager::instance().fontID(num), font); // all fonts get a recomputed ID + } + else { + ostringstream oss; + oss << "undefined font number " << num; + throw DVIException(oss.str()); + } +} + + +/** Selects a previously defined font. + * @param[in] len size of font number variable (in bytes) + * @throw DVIException if font number is undefined */ +void DVIReader::cmdFontNum (int len) { + UInt32 num = readUnsigned(len); + cmdFontNum0(num); +} + + +/** Helper function to handle a font definition. + * @param[in] fontnum local font number + * @param[in] name font name + * @param[in] checksum checksum to be compared with TFM checksum + * @param[in] ds design size in TeX point units + * @param[in] ss scaled size in TeX point units */ +void DVIReader::defineFont (UInt32 fontnum, const string &name, UInt32 cs, double ds, double ss) { + FontManager &fm = FontManager::instance(); + int id = fm.registerFont(fontnum, name, cs, ds, ss); + Font *font = fm.getFontById(id); + if (VirtualFont *vf = dynamic_cast<VirtualFont*>(font)) { + // read vf file, register its font and character definitions + fm.enterVF(vf); + ifstream ifs(vf->path(), ios::binary); + VFReader vfReader(ifs); + vfReader.replaceActions(this); + vfReader.executeAll(); + fm.leaveVF(); + } + if (_actions) + _actions->defineFont(id, font); +} + + +/** Defines a new font. + * @param[in] len size of font number variable (in bytes) */ +void DVIReader::cmdFontDef (int len) { + UInt32 fontnum = readUnsigned(len); // font number + UInt32 checksum = readUnsigned(4); // font checksum (to be compared with corresponding TFM checksum) + UInt32 ssize = readUnsigned(4); // scaled size of font in DVI units + UInt32 dsize = readUnsigned(4); // design size of font in DVI units + UInt32 pathlen = readUnsigned(1); // length of font path + UInt32 namelen = readUnsigned(1); // length of font name + string fontpath = readString(pathlen); + string fontname = readString(namelen); + + defineFont(fontnum, fontname, checksum, dsize*_scaleFactor, ssize*_scaleFactor); +} + + +/** This template method is called by the VFReader after reading a font definition from a VF file. + * @param[in] fontnum local font number + * @param[in] name font name + * @param[in] checksum checksum to be compared with TFM checksum + * @param[in] dsize design size in TeX point units + * @param[in] ssize scaled size in TeX point units */ +void DVIReader::defineVFFont (UInt32 fontnum, string path, string name, UInt32 checksum, double dsize, double ssize) { + VirtualFont *vf = FontManager::instance().getVF(); + defineFont(fontnum, name, checksum, dsize, ssize * vf->scaleFactor()); +} + + +/** This template method is called by the VFReader after reading a character definition from a VF file. + * @param[in] c character number + * @param[in] dvi DVI fragment describing the character */ +void DVIReader::defineVFChar (UInt32 c, vector<UInt8> *dvi) { + FontManager::instance().assignVfChar(c, dvi); +} |