WebCore/ksvg2/svg/SVGMatrix.h

/*
    Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>
                  2004, 2005 Rob Buis <buis@kde.org>

    This file is part of the KDE project

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.
*/

#ifndef KSVG_SVGMatrixImpl_H
#define KSVG_SVGMatrixImpl_H
#ifdef SVG_SUPPORT

#include "AffineTransform.h"
#include "Shared.h"

namespace WebCore {

    typedef int ExceptionCode;

    class SVGMatrix : public Shared<SVGMatrix> { 
    public:
        SVGMatrix();
        SVGMatrix(double a, double b, double c, double d, double e, double f);
        SVGMatrix(const AffineTransform& mat);
        virtual ~SVGMatrix();

        void setA(double);
        double a() const;

        void setB(double);
        double b() const;

        void setC(double);
        double c() const;

        void setD(double);
        double d() const;

        void setE(double);
        double e() const;

        void setF(double);
        double f() const;

        void copy(const SVGMatrix*);

        SVGMatrix* inverse(ExceptionCode&);

        // Pre-multiplied operations, as per the specs.
        SVGMatrix* multiply(const SVGMatrix*);
        SVGMatrix* translate(double x, double y);
        SVGMatrix* scale(double scaleFactor);
        SVGMatrix* scaleNonUniform(double scaleFactorX, double scaleFactorY);
        SVGMatrix* rotate(double angle);
        SVGMatrix* rotateFromVector(double x, double y, ExceptionCode&);
        SVGMatrix* flipX();
        SVGMatrix* flipY();
        SVGMatrix* skewX(double angle);
        SVGMatrix* skewY(double angle);

        // Post-multiplied operations
        SVGMatrix* postMultiply(const SVGMatrix*);
        SVGMatrix* postTranslate(double x, double y);
        SVGMatrix* postScale(double scaleFactor);
        SVGMatrix* postScaleNonUniform(double scaleFactorX, double scaleFactorY);
        SVGMatrix* postRotate(double angle);
        SVGMatrix* postRotateFromVector(double x, double y);
        SVGMatrix* postFlipX();
        SVGMatrix* postFlipY();
        SVGMatrix* postSkewX(double angle);
        SVGMatrix* postSkewY(double angle);

        void reset();

        // KSVG helper method
        AffineTransform& matrix();
        const AffineTransform& matrix() const;

        // Determine the scaling component of the matrix and factor it out. After
        // this operation, the matrix has x and y scale of one.
        void removeScale(double* xScale, double* yScale);

    private:
        void setMatrix(const AffineTransform&);
        AffineTransform m_mat;
    };

} // namespace WebCore

#endif // SVG_SUPPORT
#endif // KSVG_SVGMatrixImpl_H

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