/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: vclhelperbufferdevice.hxx,v $
 *
 *  $Revision: 1.2 $
 *
 *  last change: $Author: aw $ $Date: 2008-05-27 14:11:22 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    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
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser 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
 *
 ************************************************************************/

#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR2D_VCLHELPERBUFFERDEVICE_HXX
#define INCLUDED_DRAWINGLAYER_PROCESSOR2D_VCLHELPERBUFFERDEVICE_HXX

#include <vcl/virdev.hxx>

//////////////////////////////////////////////////////////////////////////////
// predefines

namespace basegfx { class B2DRange; }

//////////////////////////////////////////////////////////////////////////////
// support methods for vcl direct gradient renderering

namespace drawinglayer
{
    class impBufferDevice
    {
        OutputDevice&                       mrOutDev;
        VirtualDevice                       maContent;
        VirtualDevice*                      mpMask;
        VirtualDevice*                      mpAlpha;
        Rectangle                           maDestPixel;

    public:
        impBufferDevice(
            OutputDevice& rOutDev,
            const basegfx::B2DRange& rRange,
            bool bAddOffsetToMapping);
        ~impBufferDevice();

        void paint(double fTrans = 0.0);
        bool isVisible() const { return !maDestPixel.IsEmpty(); }
        VirtualDevice& getContent() { return maContent; }
        VirtualDevice& getMask();
        VirtualDevice& getAlpha();
    };
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

#endif // INCLUDED_DRAWINGLAYER_PROCESSOR2D_VCLHELPERBUFFERDEVICE_HXX

// eof