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64 lines
2.6 KiB
64 lines
2.6 KiB
15 years ago
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/* This file is part of the KDE project
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Copyright (C) 2002, 2003 The Karbon Developers
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef __SVGPATHPARSER_H__
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#define __SVGPATHPARSER_H__
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class QString;
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namespace KSVG
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{
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const char *getNumber( const char *, double & );
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}
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/**
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* Parser for svg path data, contained in the d attribute.
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*
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* The parser delivers encountered commands and parameters by calling
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* methods that correspond to those commands. Clients have to derive
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* from this class and implement the abstract command methods.
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*
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* There are two operating modes. By default the parser just delivers unaltered
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* svg path data commands and parameters. In the second mode, it will convert all
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* relative coordinates to absolute ones, and convert all curves to cubic beziers.
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*/
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class SVGPathParser
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{
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public:
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void parseSVG( const QString &d, bool process = false );
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static const char *getCoord( const char *, double & );
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protected:
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virtual void svgMoveTo( double x1, double y1, bool closed, bool abs = true ) = 0;
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virtual void svgLineTo( double x1, double y1, bool abs = true ) = 0;
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virtual void svgLineToHorizontal( double x, bool abs = true );
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virtual void svgLineToVertical( double y, bool abs = true );
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virtual void svgCurveToCubic( double x1, double y1, double x2, double y2, double x, double y, bool abs = true ) = 0;
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virtual void svgCurveToCubicSmooth( double x, double y, double x2, double y2, bool abs = true );
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virtual void svgCurveToQuadratic( double x, double y, double x1, double y1, bool abs = true );
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virtual void svgCurveToQuadraticSmooth( double x, double y, bool abs = true );
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virtual void svgArcTo( double x, double y, double r1, double r2, double angle, bool largeArcFlag, bool sweepFlag, bool abs = true );
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virtual void svgClosePath() = 0;
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private:
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void calculateArc( bool relative, double &curx, double &cury, double angle, double x, double y, double r1, double r2, bool largeArcFlag, bool sweepFlag );
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};
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#endif
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