vistexturechannel2rgba.h

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#ifndef vistexturechannel2rgba_h
#define vistexturechannel2rgba_h

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        K. Tingdahl
 Date:          Sep 2008
 RCS:           $Id$
________________________________________________________________________


-*/

#include "visbasemod.h"
#include "visdata.h"


namespace ColTab { class Sequence; }
namespace osgGeo { class LayeredTexture; class ColorSequence; }
namespace osg { class Image; }

namespace visBase
{ 

class TextureChannels;
class MappedTextureDataSet;

mExpClass(visBase) TextureChannel2RGBA : public DataObject
{ mODTextTranslationClass(TextureChannel2RGBA);
public:
    virtual MappedTextureDataSet* createMappedDataSet() const;

    virtual void                setChannels(TextureChannels*);
    virtual void                notifyChannelChange()                   {}
    virtual void                notifyChannelInsert(int ch)             {}
    virtual void                notifyChannelRemove(int ch)             {}

    virtual const osg::Image*   createRGBA() const;
    virtual bool                canSetSequence() const          { return false;}
    virtual void                setSequence(int,const ColTab::Sequence&){}
    virtual const ColTab::Sequence* getSequence(int) const      { return 0; }

    virtual void                swapChannels(int ch0,int ch1)   {}
    virtual void                setEnabled(int ch,bool yn)      {}
    virtual bool                isEnabled(int ch) const         { return true; }

    virtual bool                canUseShading() const;
    virtual void                allowShading(bool);
    virtual bool                usesShading() const;

    virtual int                 maxNrChannels() const           = 0;
    virtual int                 minNrChannels() const           { return 1; }
    virtual void                getChannelName(int,uiString&) const;
    
    int                         getTexturePixelSizeInBits() const;
    const unsigned char*        getTextureData() const;
    int                         getTextureWidth() const;
    int                         getTextureHeight() const;

protected:
                                TextureChannel2RGBA();

    TextureChannels*            channels_;
    osgGeo::LayeredTexture*     laytex_;
};


mExpClass(visBase) MappedTextureDataSet : public DataObject
{
public:
    virtual int         nrChannels() const                      = 0;
    virtual bool        addChannel()                            = 0;
    virtual bool        enableNotify(bool)                      = 0;
    virtual void        touch()                                 = 0;
    virtual void        setNrChannels(int)                      = 0;
};



mExpClass(visBase) ColTabTextureChannel2RGBA : public TextureChannel2RGBA
{
public:
    static ColTabTextureChannel2RGBA*   create()
                                mCreateDataObj(ColTabTextureChannel2RGBA);

    void                        swapChannels(int ch0,int ch1);

    bool                        canSetSequence() const          { return true;}
    void                        setSequence(int ch,const ColTab::Sequence&);
    const ColTab::Sequence*     getSequence(int ch) const;

    void                        setEnabled(int ch,bool yn);
    bool                        isEnabled(int ch) const;

    void                        setTransparency(int ch,unsigned char yn);
    unsigned char               getTransparency(int ch) const;

    int                         maxNrChannels() const;

protected:
    void                        notifyChannelInsert(int ch);
    void                        notifyChannelRemove(int ch);

    void                        adjustNrChannels();
    void                        setChannels(TextureChannels*);

                                ~ColTabTextureChannel2RGBA();

    void                        update();
    void                        getColors(int channel,
                                          TypeSet<unsigned char>&) const;

    ObjectSet<ColTab::Sequence> coltabs_;
    BoolTypeSet                 enabled_;
    TypeSet<unsigned char>      opacity_;

    ObjectSet<osgGeo::ColorSequence>    osgcolsequences_;
    ObjectSet<TypeSet<unsigned char> >  osgcolseqarrays_;
};

} //namespace

#endif