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+/*************************************************************************
+** PsSpecialHandler.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_PSSPECIALHANDLER_H
+#define DVISVGM_PSSPECIALHANDLER_H
+
+#include <set>
+#include <stack>
+#include <string>
+#include <vector>
+#include "GraphicPath.h"
+#include "PSInterpreter.h"
+#include "SpecialHandler.h"
+#include "PSPattern.h"
+#include "PSPreviewFilter.h"
+
+
+class PSPattern;
+class XMLElementNode;
+
+class PsSpecialHandler : public SpecialHandler, public DVIEndPageListener, protected PSActions
+{
+ typedef GraphicPath<double> Path;
+
+ class ClippingStack
+ {
+ public:
+ void push ();
+ void push (const Path &path, int saveID=-1);
+ void replace (const Path &path);
+ void dup (int saveID=-1);
+ void pop (int saveID=-1, bool grestore=false);
+ void clear ();
+ bool empty () const {return _stack.empty();}
+ const Path* top () const;
+ int topID () const {return _stack.empty() ? 0 : _stack.top().pathID;}
+
+ private:
+ struct Entry {
+ int pathID; ///< index referencing a path of the pool
+ int saveID; ///< if >=0, path was pushed by 'save', and saveID holds the ID of the
+ Entry (int pid, int sid) : pathID(pid), saveID(sid) {}
+ };
+ std::vector<Path> _paths; ///< pool of all clipping paths
+ std::stack<Entry> _stack;
+ };
+
+ enum PsSection {PS_NONE, PS_HEADERS, PS_BODY};
+
+ public:
+ PsSpecialHandler ();
+ ~PsSpecialHandler ();
+ const char* name () const {return "ps";}
+ const char* info () const {return "dvips PostScript specials";}
+ const char** prefixes () const;
+ bool process (const char *prefix, std::istream &is, SpecialActions *actions);
+ void setDviScaleFactor (double dvi2bp) {_previewFilter.setDviScaleFactor(dvi2bp);}
+ void enterBodySection ();
+
+ protected:
+ void initialize ();
+ void moveToDVIPos ();
+ void processHeaderFile (const char *fname);
+ void psfile (const std::string &fname, const std::map<std::string,std::string> &attr);
+ void dviEndPage (unsigned pageno);
+
+ /// scale given value by current PS scale factors
+ double scale (double v) const {return v*(_sx*_cos*_cos + _sy*(1-_cos*_cos));}
+
+ void applyscalevals (std::vector<double> &p) {_sx = p[0]; _sy = p[1]; _cos = p[2];}
+ void clip (std::vector<double> &p) {clip(p, false);}
+ void clip (std::vector<double> &p, bool evenodd);
+ void closepath (std::vector<double> &p);
+ void curveto (std::vector<double> &p);
+ void eoclip (std::vector<double> &p) {clip(p, true);}
+ void eofill (std::vector<double> &p) {fill(p, true);}
+ void fill (std::vector<double> &p, bool evenodd);
+ void fill (std::vector<double> &p) {fill(p, false);}
+ void grestore (std::vector<double> &p);
+ void grestoreall (std::vector<double> &p);
+ void gsave (std::vector<double> &p);
+ void initclip (std::vector<double> &p);
+ void lineto (std::vector<double> &p);
+ void makepattern (std::vector<double> &p);
+ void moveto (std::vector<double> &p);
+ void newpath (std::vector<double> &p);
+ void querypos (std::vector<double> &p) {_currentpoint = DPair(p[0], p[1]);}
+ void restore (std::vector<double> &p);
+ void rotate (std::vector<double> &p);
+ void save (std::vector<double> &p);
+ void scale (std::vector<double> &p);
+ void setcmykcolor (std::vector<double> &cmyk);
+ void setdash (std::vector<double> &p);
+ void setgray (std::vector<double> &p);
+ void sethsbcolor (std::vector<double> &hsb);
+ void setlinecap (std::vector<double> &p) {_linecap = UInt8(p[0]);}
+ void setlinejoin (std::vector<double> &p) {_linejoin = UInt8(p[0]);}
+ void setlinewidth (std::vector<double> &p) {_linewidth = p[0] ? scale(p[0])*1.00375 : 0.5;}
+ void setmatrix (std::vector<double> &p);
+ void setmiterlimit (std::vector<double> &p) {_miterlimit = p[0]*1.00375;}
+ void setopacityalpha (std::vector<double> &p){_opacityalpha = p[0];}
+ void setpattern (std::vector<double> &p);
+ void setrgbcolor (std::vector<double> &rgb);
+ void stroke (std::vector<double> &p);
+ void translate (std::vector<double> &p);
+ void executed ();
+
+ private:
+ PSInterpreter _psi;
+ SpecialActions *_actions;
+ PSPreviewFilter _previewFilter; ///< filter to extract information generated by the preview package
+ PsSection _psSection; ///< current section processed (nothing yet, headers, or body specials)
+ XMLElementNode *_xmlnode; ///< if != 0, created SVG elements are appended to this node
+ XMLElementNode *_savenode; ///< pointer to temporaryly store _xmlnode
+ std::string _headerCode; ///< collected literal PS header code
+ Path _path;
+ DPair _currentpoint; ///< current PS position in bp units
+ double _sx, _sy; ///< horizontal and vertical scale factors retrieved by operator "applyscalevals"
+ double _cos; ///< cosine of angle between (1,0) and transform(1,0)
+ double _linewidth; ///< current linewidth
+ double _miterlimit; ///< current miter limit
+ double _opacityalpha; ///< opacity level (0=fully transparent, ..., 1=opaque)
+ UInt8 _linecap : 2; ///< current line cap (0=butt, 1=round, 2=projecting square)
+ UInt8 _linejoin : 2; ///< current line join (0=miter, 1=round, 2=bevel)
+ double _dashoffset; ///< current dash offset
+ std::vector<double> _dashpattern;
+ ClippingStack _clipStack;
+ std::map<int, PSPattern*> _patterns;
+ PSTilingPattern *_pattern; ///< current pattern
+};
+
+#endif