/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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_DRAWPIXELS
#define OSG_DRAWPIXELS 1

#include <osg/Drawable>
#include <osg/Vec3>
#include <osg/Image>

namespace osg {

/** DrawPixels is an osg::Drawable subclass which encapsulates the drawing of
  * images using glDrawPixels.*/
class SG_EXPORT DrawPixels : public Drawable
{
    public:

        DrawPixels();

        /** Copy constructor using CopyOp to manage deep vs shallow copy.*/
        DrawPixels(const DrawPixels& drawimage,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
            
        virtual Object* cloneType() const { return new DrawPixels(); }

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


        void setPosition(const osg::Vec3& position);
        
        osg::Vec3& getPosition() { return _position; }
        const osg::Vec3& getPosition() const { return _position; }

        void setImage(osg::Image* image) { _image = image; }
        
        osg::Image* getImage() { return _image.get(); }
        const osg::Image* getImage() const { return _image.get(); }
        
        void setUseCompleteImage() { _useSubImage = false; }

        void setSubImageDimensions(unsigned int offsetX,unsigned int offsetY,unsigned int width,unsigned int height);

        void getSubImageDimensions(unsigned int& offsetX,unsigned int& offsetY,unsigned int& width,unsigned int& height) const;

        bool getUseSubImage() const { return _useSubImage; }


        virtual void drawImplementation(State& state) const;


    protected:

        DrawPixels& operator = (const DrawPixels&) { return *this;}

        virtual ~DrawPixels();

        virtual bool computeBound() const;
        
        Vec3            _position;
        ref_ptr<Image>  _image;
        
        bool            _useSubImage;
        unsigned int    _offsetX, _offsetY, _width, _height;
        
};

}

#endif
