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/*************************************************************************
** PSPattern.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 PSPATTERN_HPP
#define PSPATTERN_HPP
#include <memory>
#include <set>
#include <string>
#include "BoundingBox.hpp"
#include "Color.hpp"
#include "Matrix.hpp"
#include "XMLNode.hpp"
class SpecialActions;
class SVGTree;
class XMLElementNode;
class PSPattern {
public:
virtual ~PSPattern () =default;
virtual int psID () const {return _id;}
virtual std::string svgID () const;
virtual void apply (SpecialActions &actions);
protected:
PSPattern (int id) : _id(id) {}
virtual std::unique_ptr<XMLElementNode> createPatternNode () const =0;
private:
int _id; ///< PostSCript ID of this pattern
};
class PSTilingPattern : public PSPattern {
public:
virtual XMLElementNode* getContainerNode () {return _groupNode.get();}
void apply (SpecialActions &actions) override;
protected:
PSTilingPattern (int id, BoundingBox &bbox, Matrix &matrix, double xstep, double ystep);
std::unique_ptr<XMLElementNode> createPatternNode () const override;
virtual std::unique_ptr<XMLElementNode> createClipNode () const;
virtual std::unique_ptr<XMLElementNode> createGroupNode () const;
virtual XMLElementNode* getGroupNode () const {return _groupNodePtr;}
virtual void setGroupNode (std::unique_ptr<XMLElementNode> &&node);
private:
BoundingBox _bbox; ///< bounding box of the tile graphics
Matrix _matrix; ///< tile transformation
double _xstep, _ystep; ///< horizontal and vertical distance between neighboured tiles
mutable std::unique_ptr<XMLElementNode> _groupNode; ///< group containing the drawing elements
XMLElementNode *_groupNodePtr; ///< keeps a pointer to the group node even after moving _groupNode to the SVGTree
};
class PSColoredTilingPattern final : public PSTilingPattern {
public:
PSColoredTilingPattern (int id, BoundingBox &bbox, Matrix &matrix, double xstep, double ystep);
};
class PSUncoloredTilingPattern final : public PSTilingPattern {
public:
PSUncoloredTilingPattern (int id, BoundingBox &bbox, Matrix &matrix, double xstep, double ystep);
std::string svgID () const override;
void setColor (Color color) {_currentColor = color;}
void apply (SpecialActions &actions) override;
protected:
std::unique_ptr<XMLElementNode> createClipNode () const override;
private:
std::set<Color> _colors; ///< colors this pattern has already been drawn with
Color _currentColor; ///< current color to be applied
bool _applied; ///< has pattern with current group node already been applied to the SVG tree?
};
#endif
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