root/OpenSceneGraph/trunk/include/osg/ImageStream @ 8990

/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
 *
 * This library is open source and may be redistributed and/or modified under  
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 * 
 * 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 
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSG_IMAGESTREAM
#define OSG_IMAGESTREAM 1

#include <osg/Image>

namespace osg {

/**
  * Image Stream class.
*/
class OSG_EXPORT ImageStream : public Image
{
    public:
        ImageStream();

        /** Copy constructor using CopyOp to manage deep vs shallow copy. */
        ImageStream(const ImageStream& image,const CopyOp& copyop=CopyOp::SHALLOW_COPY);

        virtual Object* cloneType() const { return new ImageStream(); }
        virtual Object* clone(const CopyOp& copyop) const { return new ImageStream(*this,copyop); }
        virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const ImageStream*>(obj)!=0; }
        virtual const char* libraryName() const { return "osg"; }
        virtual const char* className() const { return "ImageStream"; }

        /** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
        virtual int compare(const Image& rhs) const;

        enum StreamStatus
        {
            INVALID,
            PLAYING,
            PAUSED,
            REWINDING
        };
        
        virtual void seek(double /*time*/) {}

        virtual void play() { _status=PLAYING; }

        virtual void pause() { _status=PAUSED; }

        virtual void rewind() { _status=REWINDING; }
        
        virtual void quit(bool /*waitForThreadToExit*/ = true) {}

        StreamStatus getStatus() { return _status; }
        

        enum LoopingMode
        {
            NO_LOOPING,
            LOOPING
        };
        
        void setLoopingMode(LoopingMode mode)
        {
            if (_loopingMode == mode) return;
            
            _loopingMode = mode;
            applyLoopingMode();
        }
        
        LoopingMode getLoopingMode() const { return _loopingMode; }


        virtual double getLength() const { return 0.0; }
        
        virtual void setReferenceTime(double) {}
        virtual double getReferenceTime() const { return 0.0; }
                
        virtual void setTimeMultiplier(double) {}
        virtual double getTimeMultiplier() const { return 0.0; }
        
        virtual void setVolume(float) {}
        virtual float getVolume() const { return 0.0f; }
        

    protected:
        virtual void applyLoopingMode() {}

        virtual ~ImageStream() {}

        StreamStatus    _status;
        LoopingMode     _loopingMode;
};

} // namespace

#endif