Line data    Source code

       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             : #include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>
      21             : #include <basegfx/polygon/b2dpolygon.hxx>
      22             : #include <basegfx/polygon/b2dpolygontools.hxx>
      23             : #include <basegfx/color/bcolor.hxx>
      24             : #include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx>
      25             : #include <drawinglayer/primitive2d/transparenceprimitive2d.hxx>
      26             : #include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
      27             : #include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
      28             : 
      29             : 
      30             : 
      31             : using namespace com::sun::star;
      32             : 
      33             : 
      34             : 
      35             : namespace drawinglayer
      36             : {
      37             :     namespace primitive2d
      38             :     {
      39        2005 :         UnifiedTransparencePrimitive2D::UnifiedTransparencePrimitive2D(
      40             :             const Primitive2DSequence& rChildren,
      41             :             double fTransparence)
      42             :         :   GroupPrimitive2D(rChildren),
      43        2005 :             mfTransparence(fTransparence)
      44             :         {
      45        2005 :         }
      46             : 
      47           0 :         bool UnifiedTransparencePrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
      48             :         {
      49           0 :             if(GroupPrimitive2D::operator==(rPrimitive))
      50             :             {
      51           0 :                 const UnifiedTransparencePrimitive2D& rCompare = static_cast<const UnifiedTransparencePrimitive2D&>(rPrimitive);
      52             : 
      53           0 :                 return (getTransparence() == rCompare.getTransparence());
      54             :             }
      55             : 
      56           0 :             return false;
      57             :         }
      58             : 
      59        6515 :         basegfx::B2DRange UnifiedTransparencePrimitive2D::getB2DRange(const geometry::ViewInformation2D& rViewInformation) const
      60             :         {
      61             :             // do not use the fallback to decomposition here since for a correct BoundRect we also
      62             :             // need invisible (1.0 == getTransparence()) geometry; these would be deleted in the decomposition
      63        6515 :             return getB2DRangeFromPrimitive2DSequence(getChildren(), rViewInformation);
      64             :         }
      65             : 
      66           3 :         Primitive2DSequence UnifiedTransparencePrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
      67             :         {
      68           3 :             if(0.0 == getTransparence())
      69             :             {
      70             :                 // no transparence used, so just use the content
      71           0 :                 return getChildren();
      72             :             }
      73           3 :             else if(getTransparence() > 0.0 && getTransparence() < 1.0)
      74             :             {
      75             :                 // The idea is to create a TransparencePrimitive2D with transparent content using a fill color
      76             :                 // corresponding to the transparence value. Problem is that in most systems, the right
      77             :                 // and bottom pixel array is not filled when filling polygons, thus this would not
      78             :                 // always produce a complete transparent bitmap. There are some solutions:
      79             : 
      80             :                 // - Grow the used polygon range by one discrete unit in X and Y. This
      81             :                 // will make the decomposition view-dependent.
      82             : 
      83             :                 // - For all filled polygon renderings, dra wthe polygon outline extra. This
      84             :                 // would lead to unwanted side effects when using concatenated polygons.
      85             : 
      86             :                 // - At this decomposition, add a filled polygon and a hairline polygon. This
      87             :                 // solution stays view-independent.
      88             : 
      89             :                 // I will take the last one here. The small overhead of two primitives will only be
      90             :                 // used when UnifiedTransparencePrimitive2D is not handled directly.
      91           3 :                 const basegfx::B2DRange aPolygonRange(getB2DRangeFromPrimitive2DSequence(getChildren(), rViewInformation));
      92           3 :                 const basegfx::B2DPolygon aPolygon(basegfx::tools::createPolygonFromRect(aPolygonRange));
      93           6 :                 const basegfx::BColor aGray(getTransparence(), getTransparence(), getTransparence());
      94           6 :                 Primitive2DSequence aTransparenceContent(2);
      95             : 
      96           3 :                 aTransparenceContent[0] = Primitive2DReference(new PolyPolygonColorPrimitive2D(basegfx::B2DPolyPolygon(aPolygon), aGray));
      97           3 :                 aTransparenceContent[1] = Primitive2DReference(new PolygonHairlinePrimitive2D(aPolygon, aGray));
      98             : 
      99             :                 // create sub-transparence group with a gray-colored rectangular fill polygon
     100           6 :                 const Primitive2DReference xRefB(new TransparencePrimitive2D(getChildren(), aTransparenceContent));
     101           6 :                 return Primitive2DSequence(&xRefB, 1L);
     102             :             }
     103             :             else
     104             :             {
     105             :                 // completely transparent or invalid definition, add nothing
     106           0 :                 return Primitive2DSequence();
     107             :             }
     108             :         }
     109             : 
     110             :         // provide unique ID
     111        1962 :         ImplPrimitive2DIDBlock(UnifiedTransparencePrimitive2D, PRIMITIVE2D_ID_UNIFIEDTRANSPARENCEPRIMITIVE2D)
     112             : 
     113             :     } // end of namespace primitive2d
     114             : } // end of namespace drawinglayer
     115             : 
     116             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */