summaryrefslogtreecommitdiff
path: root/dviware/dvisvgm/src/GFReader.hpp
diff options
context:
space:
mode:
Diffstat (limited to 'dviware/dvisvgm/src/GFReader.hpp')
-rw-r--r--dviware/dvisvgm/src/GFReader.hpp106
1 files changed, 106 insertions, 0 deletions
diff --git a/dviware/dvisvgm/src/GFReader.hpp b/dviware/dvisvgm/src/GFReader.hpp
new file mode 100644
index 0000000000..3dfceb98cd
--- /dev/null
+++ b/dviware/dvisvgm/src/GFReader.hpp
@@ -0,0 +1,106 @@
+/*************************************************************************
+** GFReader.hpp **
+** **
+** This file is part of dvisvgm -- a fast DVI to SVG converter **
+** Copyright (C) 2005-2019 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 GFREADER_HPP
+#define GFREADER_HPP
+
+#include <istream>
+#include <string>
+#include <unordered_map>
+#include "Bitmap.hpp"
+#include "MessageException.hpp"
+
+
+class CharInfo;
+
+
+struct GFException : public MessageException {
+ explicit GFException (const std::string &msg) : MessageException(msg) {}
+};
+
+
+class GFReader {
+ struct CharInfo {
+ CharInfo () : dx(0), dy(0), width(0), location(0) {}
+ CharInfo (int32_t dxx, int32_t dyy, int32_t w, uint32_t p) : dx(dxx), dy(dyy), width(w), location(p) {}
+
+ int32_t dx, dy;
+ int32_t width; // 2^24 * (true width)/(design size)
+ uint32_t location;
+ };
+
+ public:
+ explicit GFReader (std::istream &is);
+ virtual ~GFReader () =default;
+ virtual bool executeChar (uint8_t c);
+ virtual bool executeAllChars ();
+ bool executePreamble ();
+ bool executePostamble ();
+ virtual void preamble (const std::string &str) {}
+ virtual void postamble () {}
+ virtual void beginChar (uint32_t c) {}
+ virtual void endChar (uint32_t c) {}
+ virtual void special (const std::string &str) {}
+ virtual void numspecial (int32_t y) {}
+ const Bitmap& getBitmap () const {return _bitmap;}
+ double getDesignSize () const {return _designSize;}
+ double getHPixelsPerPoint () const {return _hppp;}
+ double getVPixelsPerPoint () const {return _vppp;};
+ double getCharWidth (uint32_t c) const;
+ uint32_t getChecksum () const {return _checksum;}
+
+ protected:
+ int32_t readSigned (int bytes);
+ uint32_t readUnsigned (int bytes);
+ std::string readString (int len);
+ int executeCommand ();
+ std::istream& getInputStream () const {return _in;}
+
+ void cmdPre (int);
+ void cmdPost (int);
+ void cmdPostPost (int);
+ void cmdPaint0 (int pixels);
+ void cmdPaint (int len);
+ void cmdBoc (int);
+ void cmdBoc1 (int);
+ void cmdEoc (int);
+ void cmdSkip (int len);
+ void cmdNewRow (int col);
+ void cmdXXX (int len);
+ void cmdYYY (int);
+ void cmdNop (int);
+ void cmdCharLoc0 (int);
+ void cmdCharLoc (int);
+
+ private:
+ std::istream &_in;
+ int32_t _minX, _maxX, _minY, _maxY;
+ int32_t _x, _y; ///< current pen location (pixel units)
+ int32_t _currentChar;
+ Bitmap _bitmap; ///< bitmap of current char
+ double _designSize; ///< designSize in PS points
+ double _hppp, _vppp; ///< horizontal and vertical pixel per point
+ uint32_t _checksum;
+ std::unordered_map<uint8_t,CharInfo> _charInfoMap;
+ bool _insideCharDef; ///< true if inside a character definition (between BOC and EOC)
+ bool _penDown;
+};
+
+#endif