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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.9/src/DVIReader.h')
| -rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-1.9/src/DVIReader.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.9/src/DVIReader.h b/Build/source/texk/dvisvgm/dvisvgm-1.9/src/DVIReader.h new file mode 100644 index 00000000000..366a110f531 --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-1.9/src/DVIReader.h @@ -0,0 +1,144 @@ +/************************************************************************* +** DVIReader.h ** +** ** +** 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/>. ** +*************************************************************************/ + +#ifndef DVISVGM_DVIREADER_H +#define DVISVGM_DVIREADER_H + +#include <limits> +#include <map> +#include <stack> +#include <string> +#include "BasicDVIReader.h" +#include "MessageException.h" +#include "StreamReader.h" +#include "VFActions.h" +#include "types.h" + + +struct DVIActions; + +class DVIReader : public BasicDVIReader, protected VFActions +{ + enum WritingMode {WMODE_LR=0, WMODE_TB=1, WMODE_BT=3}; + + struct DVIState + { + double h, v; ///< horizontal and vertical cursor position + double x, w, y, z; ///< additional registers to store horizontal (x, w) and vertical (y, z) positions + WritingMode d; ///< direction: 0: horizontal, 1: vertical(top->bottom), 3: vertical (bottom->top) + DVIState () {reset();} + void reset () {h = v = x = w = y = z = 0.0; d=WMODE_LR;} + }; + + public: + DVIReader (std::istream &is, DVIActions *a=0); + + bool executeDocument (); + void executeAll (); + void executePreamble (); + void executePostamble (); + bool executePage (unsigned n); + bool inPostamble () const {return _inPostamble;} + double getXPos () const; + double getYPos () const; + void finishLine () {_prevYPos = std::numeric_limits<double>::min();} + void translateToX (double x) {_tx = x-_dviState.h-_tx;} + void translateToY (double y) {_ty = y-_dviState.v-_ty;} + double getPageWidth () const {return _pageWidth;} + double getPageHeight () const {return _pageHeight;} + int getStackDepth () const {return _stateStack.size();} + int getCurrentFontNumber () const {return _currFontNum;} + unsigned getCurrentPageNumber () const {return _currPageNum;} + unsigned numberOfPages () const {return _bopOffsets.empty() ? 0 : _bopOffsets.size()-1;} + DVIActions* getActions () const {return _actions;} + DVIActions* replaceActions (DVIActions *a); + + protected: + void collectBopOffsets (); + size_t numberOfPageBytes (int n) const {return _bopOffsets.size() > 1 ? _bopOffsets[n+1]-_bopOffsets[n] : 0;} + int executeCommand (); + void moveRight (double dx); + void moveDown (double dy); + void putChar (UInt32 c, bool moveCursor); + void putGlyphArray (bool xonly); + void defineFont (UInt32 fontnum, const std::string &name, UInt32 cs, double ds, double ss); + virtual void beginPage (unsigned pageno, Int32 *c) {} + virtual void endPage (unsigned pageno) {} + + // VFAction methods + void defineVFFont (UInt32 fontnum, std::string path, std::string name, UInt32 checksum, double dsize, double ssize); + void defineVFChar (UInt32 c, std::vector<UInt8> *dvi); + + // the following methods represent the DVI commands + // they are called by executeCommand and should not be used directly + void cmdSetChar0 (int c); + void cmdSetChar (int len); + void cmdPutChar (int len); + void cmdSetRule (int len); + void cmdPutRule (int len); + void cmdNop (int len); + void cmdBop (int len); + void cmdEop (int len); + void cmdPush (int len); + void cmdPop (int len); + void cmdDir (int len); + void cmdRight (int len); + void cmdDown (int len); + void cmdX0 (int len); + void cmdY0 (int len); + void cmdW0 (int len); + void cmdZ0 (int len); + void cmdX (int len); + void cmdY (int len); + void cmdW (int len); + void cmdZ (int len); + void cmdFontDef (int len); + void cmdFontNum0 (int n); + void cmdFontNum (int len); + void cmdXXX (int len); + void cmdPre (int len); + void cmdPost (int len); + void cmdPostPost (int len); + void cmdXPic (int len); + void cmdXFontDef (int len); + void cmdXGlyphA (int len); + void cmdXGlyphS (int len); + + private: + DVIActions *_actions; ///< actions to be performed on various DVI events + bool _inPage; ///< true if between bop and eop + unsigned _currPageNum; ///< current page number (1 is first page) + int _currFontNum; ///< current font number + double _dvi2bp; ///< factor to convert dvi units to PS points + UInt32 _mag; ///< magnification factor * 1000 + bool _inPostamble; ///< true if stream pointer is inside the postamble + double _pageHeight, _pageWidth; ///< page height and width in PS points + DVIState _dviState; ///< current cursor position + std::stack<DVIState> _stateStack; + std::vector<UInt32> _bopOffsets; + double _prevYPos; ///< previous vertical cursor position + double _tx, _ty; ///< tranlation of cursor position + std::streampos _pagePos; ///< distance of current DVI command from bop (in bytes) + + public: + static bool COMPUTE_PROGRESS; ///< if true, an action to handle the progress ratio of a page is triggered +}; + +#endif |