IvfBlending.h

//
// Copyright 1999-2006 by Structural Mechanics, Lund University.
//
// 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; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "ivf@byggmek.lth.se".
//
//
// Written by Jonas Lindemann
//

#ifndef _CIvfBlending_h_
#define _CIvfBlending_h_

#include <ivf/IvfBase.h>
#include <ivfdef/IvfSingletonDestroyer.h>

IvfSmartPointer(CIvfBlending);

class IVF_API CIvfBlending : public CIvfBase {
public:
        enum TBlendFactor {
                BF_ZERO,
                BF_ONE,
                BF_DST_COLOR,
                BF_SRC_COLOR,
                BF_ONE_MINUS_DST_COLOR,
                BF_ONE_MINUS_SRC_COLOR,
                BF_SRC_ALPHA,
                BF_ONE_MINUS_SRC_ALPHA,
                BF_DST_ALPHA,
                BF_ONE_MINUS_DST_ALPHA,
                BF_SRC_ALPHA_SATURATE
        };
private:
        static CIvfBlending* m_instance;
        static CIvfSingletonDestroyer<CIvfBlending> m_destroyer;
public:
        static CIvfBlending* getInstance();

        IvfClassInfo("CIvfBlending",CIvfBase);

        void enable();

        void disable();

        bool isEnabled();

        void setFunction(TBlendFactor src, TBlendFactor dst);

        void saveState();

        void restoreState();

        void defineAlphaBlendFunction();
        void defineAddFunction();

protected:

        CIvfBlending();
        friend class CIvfSingletonDestroyer<CIvfBlending>;
};

#endif 

---