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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.10/src/PSInterpreter.h')
| -rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-1.10/src/PSInterpreter.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.10/src/PSInterpreter.h b/Build/source/texk/dvisvgm/dvisvgm-1.10/src/PSInterpreter.h new file mode 100644 index 00000000000..528e95ca83c --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-1.10/src/PSInterpreter.h @@ -0,0 +1,129 @@ +/************************************************************************* +** PSInterpreter.h ** +** ** +** This file is part of dvisvgm -- the DVI to SVG converter ** +** Copyright (C) 2005-2015 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_PSINTERPRETER_H +#define DVISVGM_PSINTERPRETER_H + +#include <cstring> +#include <istream> +#include <string> +#include <vector> +#include "Ghostscript.h" +#include "InputReader.h" +#include "MessageException.h" + + +struct PSException : public MessageException +{ + PSException (const std::string &msg) : MessageException(msg) {} +}; + + +/** This interface provides the template methods called by PSInterpreter when executing a PS snippet. + * Each method corresponds to a PostScript operator of the same name. */ +struct PSActions +{ + virtual ~PSActions () {} + virtual void applyscalevals (std::vector<double> &p) =0; + virtual void clip (std::vector<double> &p) =0; + virtual void clippath (std::vector<double> &p) =0; + virtual void closepath (std::vector<double> &p) =0; + virtual void curveto (std::vector<double> &p) =0; + virtual void eoclip (std::vector<double> &p) =0; + virtual void eofill (std::vector<double> &p) =0; + virtual void fill (std::vector<double> &p) =0; + virtual void gsave (std::vector<double> &p) =0; + virtual void grestore (std::vector<double> &p) =0; + virtual void grestoreall (std::vector<double> &p) =0; + virtual void initclip (std::vector<double> &p) =0; + virtual void lineto (std::vector<double> &p) =0; + virtual void makepattern (std::vector<double> &p) =0; + virtual void moveto (std::vector<double> &p) =0; + virtual void newpath (std::vector<double> &p) =0; + virtual void querypos (std::vector<double> &p) =0; + virtual void restore (std::vector<double> &p) =0; + virtual void rotate (std::vector<double> &p) =0; + virtual void save (std::vector<double> &p) =0; + virtual void scale (std::vector<double> &p) =0; + virtual void setcmykcolor (std::vector<double> &cmyk) =0; + virtual void setdash (std::vector<double> &p) =0; + virtual void setgray (std::vector<double> &p) =0; + virtual void sethsbcolor (std::vector<double> &hsb) =0; + virtual void setlinecap (std::vector<double> &p) =0; + virtual void setlinejoin (std::vector<double> &p) =0; + virtual void setlinewidth (std::vector<double> &p) =0; + virtual void setmatrix (std::vector<double> &p) =0; + virtual void setmiterlimit (std::vector<double> &p) =0; + virtual void setopacityalpha (std::vector<double> &p) =0; + virtual void setpattern (std::vector<double> &p) =0; + virtual void setrgbcolor (std::vector<double> &rgb) =0; + virtual void shfill (std::vector<double> &rgb) =0; + virtual void stroke (std::vector<double> &p) =0; + virtual void translate (std::vector<double> &p) =0; + virtual void executed () {} // triggered if one of the above PS operators has been executed +}; + +class PSFilter; + +/** This class provides methods to execute chunks of PostScript code and calls + * several template methods on invocation of selected PS operators (see PSActions). */ +class PSInterpreter +{ + enum Mode {PS_NONE, PS_RUNNING, PS_QUIT}; + + public: + PSInterpreter (PSActions *actions=0); + bool execute (const char *str, size_t len, bool flush=true); + bool execute (const char *str, bool flush=true) {return execute(str, std::strlen(str), flush);} + bool execute (const std::string &str, bool flush=true) {return execute(str.c_str(), flush);} + bool execute (std::istream &is, bool flush=true); + bool executeRaw (const std::string &str, int n); + bool active () const {return _mode != PS_QUIT;} + void limit (size_t max_bytes) {_bytesToRead = max_bytes;} + void setFilter (PSFilter *filter) {_filter = filter;} + PSActions* setActions (PSActions *actions); + const std::vector<std::string>& rawData () const {return _rawData;} + + protected: + void init (); + // callback functions + static int GSDLLCALL input (void *inst, char *buf, int len); + static int GSDLLCALL output (void *inst, const char *buf, int len); + static int GSDLLCALL error (void *inst, const char *buf, int len); + + void checkStatus (int status); + void callActions (InputReader &cib); + + private: + Ghostscript _gs; + Mode _mode; ///< current execution mode + PSActions *_actions; ///< actions to be performed + PSFilter *_filter; ///< active filter used to process PS code + size_t _bytesToRead; ///< if > 0, maximal number of bytes to be processed by following calls of execute() + std::vector<char> _linebuf; + std::string _errorMessage; ///< text of error message + bool _inError; ///< true if scanning error message + bool _initialized; ///< true if PSInterpreter has been completely initialized + std::vector<std::string> _rawData; ///< raw data received + static const char *GSARGS[]; ///< parameters passed to Ghostscript + static const char *PSDEFS; ///< initial PostScript definitions +}; + +#endif |