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/*************************************************************************
*
* $RCSfile: canvasgraphic.hxx,v $
*
* $Revision: 1.3 $
*
* last change: $Author: rt $ $Date: 2004-09-08 16:57:05 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 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
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://www.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
#ifndef _CPPCANVAS_CANVASGRAPHIC_HXX
#define _CPPCANVAS_CANVASGRAPHIC_HXX
#ifndef _SAL_TYPES_H_
#include <sal/types.h>
#endif
#ifndef BOOST_SHARED_PTR_HPP_INCLUDED
#include <boost/shared_ptr.hpp>
#endif
#ifndef _CPPCANVAS_COLOR_HXX
#include <cppcanvas/color.hxx>
#endif
#ifndef _CPPCANVAS_CANVAS_HXX
#include <cppcanvas/canvas.hxx>
#endif
namespace basegfx
{
class B2DHomMatrix;
class B2DPolyPolygon;
}
/* Definition of CanvasGraphic interface */
namespace cppcanvas
{
// forward declaration, since PolyPolygon also derives from CanvasGraphic
typedef ::boost::shared_ptr< class PolyPolygon > PolyPolygonSharedPtr;
/** This interface defines basic properties of
objects that can be painted on a Canvas
*/
class CanvasGraphic
{
public:
/** These enums determine how the primitive color is combined
with the background. When performing this calculations, it
is assumed that all color values are premultiplied with
the corresponding alpha values (if no alpha is specified,
1.0 is assumed). Then, the following general compositing
operation is performed:
C = Ca * Fa + Cb * Fb
where C is the result color, Ca and Cb are the input
colors, premultiplied with alpha, and Fa and Fb are
described for the different composite modes (wherein Aa
and Ab denote source and destination alpha, respectively).
*/
enum CompositeOp
{
/// Clear destination. Fa = Fb = 0.
CLEAR,
/// Copy source as-is to destination. Fa = 1, Fb = 0.
SOURCE,
/// Leave destination as-is. Fa = 0, Fb = 1.
DESTINATION,
/// Copy source over destination. Fa = 1, Fb = 1-Aa.
OVER,
/// Copy source under destination. Fa = 1-Ab, Fb = 1.
UNDER,
/// Copy source to destination, but limited to where the destination is. Fa = Ab, Fb = 0.
INSIDE,
/// Leave destination as is, but only where source was. Fa = 0, Fb = Aa.
INSIDE_REVERSE,
/// Copy source to destination, but limited to where destination is not. Fa = 1-Ab, Fb = 0.
OUTSIDE,
/// Leave destination as is, but only where source has not been. Fa = 0, Fb = 1-Aa.
OUTSIDE_REVERSE,
/// Copy source over destination, but only where destination is. Keep destination. Fa = Ab, Fb = 1-Aa.
ATOP,
/// Copy destination over source, but only where source is. Keep source. Fa = 1-Ab, Fb = Aa.
ATOP_REVERSE,
/// Take only parts where either source or destination, but not both are. Fa = 1-Ab, Fb = 1-Aa.
XOR,
/** simply add contributions of both source and destination. The
resulting color values are limited to the permissible color
range, and clipped to the maximal value, if exceeded. Fa = 1, Fb = 1.
*/
ADD,
/// Fa = min(1,(1-Ab)/Aa), Fb = 1
SATURATE
};
virtual ~CanvasGraphic() {}
/** Set object transformation matrix
*/
virtual void setTransformation( const ::basegfx::B2DHomMatrix& rMatrix ) = 0;
/** Get object transformation matrix
*/
virtual ::basegfx::B2DHomMatrix getTransformation() const = 0;
/** Set object clipping polygon
*/
virtual void setClip( const PolyPolygonSharedPtr& rClipPoly ) = 0;
/** Get object clipping polygon
*/
virtual PolyPolygonSharedPtr getClip() const = 0;
/** Set object color
*/
virtual void setRGBAColor( Color::IntSRGBA ) = 0;
/** Get object color
*/
virtual Color::IntSRGBA getRGBAColor() const = 0;
/** Set object composite mode
*/
virtual void setCompositeOp( CompositeOp aOp ) = 0;
/** Get object composite mode
*/
virtual CompositeOp getCompositeOp() const = 0;
/** Render to parent canvas
This method renders the content to the parent canvas,
i.e. the canvas this object was constructed for.
@return whether the rendering finished successfully.
*/
virtual bool draw() const = 0;
};
typedef ::boost::shared_ptr< ::cppcanvas::CanvasGraphic > CanvasGraphicSharedPtr;
}
#endif /* _CPPCANVAS_CANVASGRAPHIC_HXX */
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