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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/BasicDVIReader.hpp')
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1 files changed, 117 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/BasicDVIReader.hpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/BasicDVIReader.hpp new file mode 100644 index 00000000000..cf2d8194e04 --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-src/src/BasicDVIReader.hpp @@ -0,0 +1,117 @@ +/************************************************************************* +** BasicDVIReader.hpp ** +** ** +** This file is part of dvisvgm -- a fast DVI to SVG converter ** +** Copyright (C) 2005-2017 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 BASICDVIREADER_HPP +#define BASICDVIREADER_HPP + +#include "MessageException.hpp" +#include "StreamReader.hpp" + +struct DVIException : public MessageException +{ + explicit DVIException (const std::string &msg) : MessageException(msg) {} +}; + + +struct InvalidDVIFileException : public DVIException +{ + explicit InvalidDVIFileException (const std::string &msg) : DVIException(msg) {} +}; + +class Matrix; + +/** This class provides the basic functionality to read a DVI file. + * It just skips all DVI commands and apply any semantic to it. The latter must + * be realized by deriving a separate class that implements the cmdXXX template + * methods. These are low-level functions that represent the DVI commands and + * require to read and evaluate the correct portion of data from the DVI stream. + * Since the DVI commands are almost skipped by advancing the file pointer, + * running through a DVI file is pretty fast. */ +class BasicDVIReader : public StreamReader +{ + protected: + typedef void (BasicDVIReader::*CommandHandler)(int); + enum DVIVersion {DVI_NONE=0, DVI_STANDARD=2, DVI_PTEX=3, DVI_XDV5=5, DVI_XDV6=6, DVI_XDV7=7}; + const uint8_t OP_SETCHAR0=0, OP_SETCHAR127=127, OP_SET1=128, OP_EOP=140, OP_FNTNUM0=171, OP_FNTNUM63=234, + OP_PRE=247, OP_POST=248, OP_POSTPOST=249, OP_DIR=255, DVI_FILL=223; + + public: + explicit BasicDVIReader (std::istream &is); + virtual ~BasicDVIReader () =default; + virtual void executeAllPages (); + virtual double getXPos () const {return 0;} + virtual double getYPos () const {return 0;} + virtual void finishLine () {} + virtual void translateToX (double x) {} + virtual void translateToY (double y) {} + virtual int stackDepth () const {return 0;} + virtual void getPageTransformation (Matrix &matrix) const {} + virtual unsigned currentPageNumber () const {return 0;} + + protected: + void setDVIVersion (DVIVersion version); + DVIVersion getDVIVersion () const {return _dviVersion;} + virtual int evalCommand (CommandHandler &handler, int ¶m); + virtual int executeCommand (); + void executePostPost (); + bool evalXDVOpcode (int op, CommandHandler &handler) const; + + // The following template methods represent the single DVI commands. They + // must read the correct chunk of data from the input stream in order to + // process the DVI file correctly. + virtual void cmdSetChar0 (int c); + virtual void cmdSetChar (int len); + virtual void cmdPutChar (int len); + virtual void cmdSetRule (int len); + virtual void cmdPutRule (int len); + virtual void cmdNop (int len); + virtual void cmdBop (int len); + virtual void cmdEop (int len); + virtual void cmdPush (int len); + virtual void cmdPop (int len); + virtual void cmdDir (int len); + virtual void cmdRight (int len); + virtual void cmdDown (int len); + virtual void cmdX0 (int len); + virtual void cmdY0 (int len); + virtual void cmdW0 (int len); + virtual void cmdZ0 (int len); + virtual void cmdX (int len); + virtual void cmdY (int len); + virtual void cmdW (int len); + virtual void cmdZ (int len); + virtual void cmdFontDef (int len); + virtual void cmdFontNum0 (int n); + virtual void cmdFontNum (int len); + virtual void cmdXXX (int len); + virtual void cmdPre (int len); + virtual void cmdPost (int len); + virtual void cmdPostPost (int len); + virtual void cmdXFontDef (int len); // XDV only + virtual void cmdXGlyphArray (int len); // XDV only + virtual void cmdXGlyphString (int len); // XDV version 5 only + virtual void cmdXPic (int len); // XDV version 5 only + virtual void cmdXTextAndGlyphs (int len); // XDV version 7 only + + private: + DVIVersion _dviVersion; ///< DVI version of file being processed +}; + +#endif |