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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_TRANSPARENCEPRIMITIVE2D_HXX
+#define INCLUDED_DRAWINGLAYER_PRIMITIVE2D_TRANSPARENCEPRIMITIVE2D_HXX
+
+#include <drawinglayer/primitive2d/groupprimitive2d.hxx>
+
+//////////////////////////////////////////////////////////////////////////////
+
+namespace drawinglayer
+{
+    namespace primitive2d
+    {
+        /** TransparencePrimitive2D 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 a transparence channel also defined as a sequence
+            of primitives and hold in the transparence member.
+
+            The basic definition is to use the transparence content as transparence-Mask by
+            interpreting the transparence-content not as RGB, but as Luminance transparence mask
+            using the common RGB_to_luminance definition as e.g. used by VCL.
+
+            The defining geometry is the Range of the child primitive sequence,
+            this means the renderers will/shall use this geometric information for
+            rendering, not the transparent one. The transparent one should/will be clipped
+            accordingly.
+         */
+        class TransparencePrimitive2D : public GroupPrimitive2D
+        {
+        private:
+            /// The transparence-Mask who's RGB-Values are interpreted as Luminance
+            Primitive2DSequence                     maTransparence;
+
+        public:
+            /** constructor
+
+                @param rChildren
+                The content which is defined to have a transparency. The
+                range of this primitive is defined by this content
+
+                @param rTransparence
+                The definition of the Transparence-channel for this primitive. It
+                will be interpreted as mask by interpreting as gray values
+                using the common RGB_to_luminance definitions
+             */
+            TransparencePrimitive2D(
+                const Primitive2DSequence& rChildren,
+                const Primitive2DSequence& rTransparence);
+
+            /// data read access
+            const Primitive2DSequence& getTransparence() const { return maTransparence; }
+
+            /// 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_TRANSPARENCEPRIMITIVE2D_HXX
+
+//////////////////////////////////////////////////////////////////////////////
+// eof