LCOV - code coverage report
Current view: top level - include/cppcanvas - canvasgraphic.hxx (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 0 2 0.0 %
Date: 2014-04-14 Functions: 0 3 0.0 %
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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #ifndef INCLUDED_CPPCANVAS_CANVASGRAPHIC_HXX
      21             : #define INCLUDED_CPPCANVAS_CANVASGRAPHIC_HXX
      22             : 
      23             : #include <sal/types.h>
      24             : 
      25             : #include <boost/shared_ptr.hpp>
      26             : #include <cppcanvas/color.hxx>
      27             : #include <cppcanvas/canvas.hxx>
      28             : 
      29             : namespace basegfx
      30             : {
      31             :     class B2DHomMatrix;
      32             :     class B2DPolyPolygon;
      33             : }
      34             : 
      35             : 
      36             : /* Definition of CanvasGraphic interface */
      37             : 
      38             : namespace cppcanvas
      39             : {
      40             :     // forward declaration, since PolyPolygon also derives from CanvasGraphic
      41             :     typedef ::boost::shared_ptr< class PolyPolygon > PolyPolygonSharedPtr;
      42             : 
      43             : 
      44             :     /** This interface defines basic properties of
      45             :         objects that can be painted on a Canvas
      46             :      */
      47           0 :     class CanvasGraphic
      48             :     {
      49             :     public:
      50             : 
      51             :         /** These enums determine how the primitive color is combined
      52             :             with the background. When performing this calculations, it
      53             :             is assumed that all color values are premultiplied with
      54             :             the corresponding alpha values (if no alpha is specified,
      55             :             1.0 is assumed). Then, the following general compositing
      56             :             operation is performed:
      57             : 
      58             :             C = Ca * Fa + Cb * Fb
      59             : 
      60             :             where C is the result color, Ca and Cb are the input
      61             :             colors, premultiplied with alpha, and Fa and Fb are
      62             :             described for the different composite modes (wherein Aa
      63             :             and Ab denote source and destination alpha, respectively).
      64             :         */
      65             :         enum CompositeOp
      66             :         {
      67             :             /// Clear destination. Fa = Fb = 0.
      68             :             CLEAR,
      69             : 
      70             :             /// Copy source as-is to destination. Fa = 1, Fb = 0.
      71             :             SOURCE,
      72             : 
      73             :             /// Leave destination as-is.  Fa = 0, Fb = 1.
      74             :             DESTINATION,
      75             : 
      76             :             /// Copy source over destination. Fa = 1, Fb = 1-Aa.
      77             :             OVER,
      78             : 
      79             :             /// Copy source under destination. Fa = 1-Ab, Fb = 1.
      80             :             UNDER,
      81             : 
      82             :             /// Copy source to destination, but limited to where the destination is. Fa = Ab, Fb = 0.
      83             :             INSIDE,
      84             : 
      85             :             /// Leave destination as is, but only where source was. Fa = 0, Fb = Aa.
      86             :             INSIDE_REVERSE,
      87             : 
      88             :             /// Copy source to destination, but limited to where destination is not. Fa = 1-Ab, Fb = 0.
      89             :             OUTSIDE,
      90             : 
      91             :             /// Leave destination as is, but only where source has not been. Fa = 0, Fb = 1-Aa.
      92             :             OUTSIDE_REVERSE,
      93             : 
      94             :             /// Copy source over destination, but only where destination is. Keep destination. Fa = Ab, Fb = 1-Aa.
      95             :             ATOP,
      96             : 
      97             :             /// Copy destination over source, but only where source is. Keep source. Fa = 1-Ab, Fb = Aa.
      98             :             ATOP_REVERSE,
      99             : 
     100             :             /// Take only parts where either source or destination, but not both are. Fa = 1-Ab, Fb = 1-Aa.
     101             :             XOR,
     102             : 
     103             :             /** simply add contributions of both source and destination. The
     104             :                 resulting color values are limited to the permissible color
     105             :                 range, and clipped to the maximal value, if exceeded. Fa = 1, Fb = 1.
     106             :             */
     107             :             ADD,
     108             : 
     109             :             /// Fa = min(1,(1-Ab)/Aa), Fb = 1
     110             :             SATURATE
     111             :         };
     112             : 
     113           0 :         virtual ~CanvasGraphic() {}
     114             : 
     115             :         /** Set object transformation matrix
     116             :          */
     117             :         virtual void                             setTransformation( const ::basegfx::B2DHomMatrix& rMatrix ) = 0;
     118             :         /** Get object transformation matrix
     119             :          */
     120             :         virtual ::basegfx::B2DHomMatrix          getTransformation() const = 0;
     121             : 
     122             :         /** Set object clipping polygon
     123             :          */
     124             :         virtual void                             setClip( const ::basegfx::B2DPolyPolygon& rClipPoly ) = 0;
     125             :         /** Clear object clipping polygon
     126             :          */
     127             :         virtual void                             setClip() = 0;
     128             :         /** Get object clipping polygon
     129             : 
     130             :             @return NULL, if no clip is set; otherwise, the current clip poly-polygon is returned
     131             :          */
     132             :         virtual ::basegfx::B2DPolyPolygon const* getClip() const = 0;
     133             : 
     134             :         /** Set object composite mode
     135             :          */
     136             :         virtual void                             setCompositeOp( CompositeOp aOp ) = 0;
     137             :         /** Get object composite mode
     138             :          */
     139             :         virtual CompositeOp                      getCompositeOp() const = 0;
     140             : 
     141             :         /** Render to parent canvas
     142             : 
     143             :             This method renders the content to the parent canvas,
     144             :             i.e. the canvas this object was constructed for.
     145             : 
     146             :             @return whether the rendering finished successfully.
     147             :          */
     148             :         virtual bool draw() const = 0;
     149             : 
     150             :     };
     151             : 
     152             :     typedef ::boost::shared_ptr< ::cppcanvas::CanvasGraphic > CanvasGraphicSharedPtr;
     153             : }
     154             : 
     155             : #endif // INCLUDED_CPPCANVAS_CANVASGRAPHIC_HXX
     156             : 
     157             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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