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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: alphaprimitive2d.hxx,v $
*
* $Revision: 1.3 $
*
* last change: $Author: aw $ $Date: 2008-05-27 14:11:16 $
*
* 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_PRIMITIVE2D_ALPHAPRIMITIVE2D_HXX
#define INCLUDED_DRAWINGLAYER_PRIMITIVE2D_ALPHAPRIMITIVE2D_HXX
#include <drawinglayer/primitive2d/groupprimitive2d.hxx>
//////////////////////////////////////////////////////////////////////////////
namespace drawinglayer
{
namespace primitive2d
{
/** AlphaPrimitive2D class
This is the basic primitive for applying freely defined transparence
to freely defined content. The basic idea is to associate a content
which is defined as a sequence of primitives and hold as child content
in the GroupPrimitive2D with an alpha channel also defined as a sequence
of primitives and hold in the Alpha member.
The basic definition is to use the Alpha content as Alpha-Mask by
interpreting the Alpha-content not as RGB, but as Luminance alpha mask
using the common RGB_to_luminance definition as e.g. used by VCL
*/
class AlphaPrimitive2D : public GroupPrimitive2D
{
private:
/// The Alpha-Mask who's RGB-Values are interpreted as Luminance
Primitive2DSequence maAlpha;
public:
/// constructor
AlphaPrimitive2D(
const Primitive2DSequence& rChildren,
const Primitive2DSequence& rAlpha);
/// data read access
const Primitive2DSequence& getAlpha() const { return maAlpha; }
/// compare operator
virtual bool operator==(const BasePrimitive2D& rPrimitive) const;
/// provide unique ID
DeclPrimitrive2DIDBlock()
};
} // end of namespace primitive2d
} // end of namespace drawinglayer
//////////////////////////////////////////////////////////////////////////////
#endif //INCLUDED_DRAWINGLAYER_PRIMITIVE2D_ALPHAPRIMITIVE2D_HXX
//////////////////////////////////////////////////////////////////////////////
// eof
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