Exporter.h

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/*
 This file is part of the VRender library.
 Copyright (C) 2005 Cyril Soler (Cyril.Soler@imag.fr)
 Version 1.0.0, released on June 27, 2005.

 http://artis.imag.fr/Members/Cyril.Soler/VRender

 VRender 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 2 of the License, or
 (at your option) any later version.

 VRender 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 VRender; if not, write to the Free Software Foundation, Inc.,
 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/

/****************************************************************************

 Copyright (C) 2002-2013 Gilles Debunne. All rights reserved.

 This file is part of the QGLViewer library version 2.4.0.

 http://www.libqglviewer.com - contact@libqglviewer.com

 This file may be used under the terms of the GNU General Public License 
 versions 2.0 or 3.0 as published by the Free Software Foundation and
 appearing in the LICENSE file included in the packaging of this file.
 In addition, as a special exception, Gilles Debunne gives you certain 
 additional rights, described in the file GPL_EXCEPTION in this package.

 libQGLViewer uses dual licensing. Commercial/proprietary software must
 purchase a libQGLViewer Commercial License.

 This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

*****************************************************************************/

#ifndef _VRENDER_EXPORTER_H
#define _VRENDER_EXPORTER_H

// Set of classes for exporting in various formats, like EPS, XFig3.2, SVG.

#include "Primitive.h"

#include "../config.h"
#if QT_VERSION >= 0x040000
# include <QTextStream>
# include <QString>
#else
# include <qtextstream.h>
# include <qstring.h>
#endif

namespace vrender
{
        class VRenderParams ;
        class Exporter
        {
                public:
                        Exporter() ;
                        virtual ~Exporter() {};

                        virtual void exportToFile(const QString& filename,const std::vector<PtrPrimitive>&,VRenderParams&) ;

                        void setBoundingBox(float xmin,float ymin,float xmax,float ymax) ;
                        void setClearColor(float r,float g,float b) ;
                        void setClearBackground(bool b) ;
                        void setBlackAndWhite(bool b) ;

                protected:
                        virtual void spewPoint(const Point *, QTextStream& out) = 0 ;
                        virtual void spewSegment(const Segment *, QTextStream& out) = 0 ;
                        virtual void spewPolygone(const Polygone *, QTextStream& out) = 0 ;

                        virtual void writeHeader(QTextStream& out) const = 0 ;
                        virtual void writeFooter(QTextStream& out) const = 0 ;

                        float _clearR,_clearG,_clearB ;
                        float _pointSize ;
                        float _lineWidth ;

                        GLfloat _xmin,_xmax,_ymin,_ymax,_zmin,_zmax ;

                        bool _clearBG,_blackAndWhite ;
        };

        // Exports to encapsulated postscript.

        class EPSExporter: public Exporter
        {
                public:
                        EPSExporter() ;
                        virtual ~EPSExporter() {};

                protected:
                        virtual void spewPoint(const Point *, QTextStream& out) ;
                        virtual void spewSegment(const Segment *, QTextStream& out) ;
                        virtual void spewPolygone(const Polygone *, QTextStream& out) ;

                        virtual void writeHeader(QTextStream& out) const ;
                        virtual void writeFooter(QTextStream& out) const ;

                private:
                        void setColor(QTextStream& out,float,float,float) ;

                        static const double EPS_GOURAUD_THRESHOLD ;
                        static const char *GOURAUD_TRIANGLE_EPS[] ;
                        static const char *CREATOR ;

                        static float last_r ;
                        static float last_g ;
                        static float last_b ;
        };

        //  Exports to postscript. The only difference is the filename extension and
        // the showpage at the end.

        class PSExporter: public EPSExporter
        {
                public:
                        virtual ~PSExporter() {};
                protected:
                        virtual void writeFooter(QTextStream& out) const ;
        };

        class FIGExporter: public Exporter
        {
                public:
                        FIGExporter() ;
                        virtual ~FIGExporter() {};

                protected:
                        virtual void spewPoint(const Point *, QTextStream& out) ;
                        virtual void spewSegment(const Segment *, QTextStream& out) ;
                        virtual void spewPolygone(const Polygone *, QTextStream& out) ;

                        virtual void writeHeader(QTextStream& out) const ;
                        virtual void writeFooter(QTextStream& out) const ;

                private:
                        mutable int _sizeX ;
                        mutable int _sizeY ;
                        mutable int _depth ;

                        int FigCoordX(double) const ;
                        int FigCoordY(double) const ;
                        int FigGrayScaleIndex(float red, float green, float blue) const ;
        };
#ifdef A_FAIRE
        class SVGExporter: public Exporter
        {
                protected:
                        virtual void spewPoint(const Point *, QTextStream& out) ;
                        virtual void spewSegment(const Segment *, QTextStream& out) ;
                        virtual void spewPolygone(const Polygone *, QTextStream& out) ;

                        virtual void writeHeader(QTextStream& out) const ;
                        virtual void writeFooter(QTextStream& out) const ;
        };
#endif
}

#endif