LCOV - code coverage report
Current view: top level - drawinglayer/source/primitive2d - cropprimitive2d.cxx (source / functions) Hit Total Coverage
Test: commit c8344322a7af75b84dd3ca8f78b05543a976dfd5 Lines: 32 41 78.0 %
Date: 2015-06-13 12:38:46 Functions: 3 4 75.0 %
Legend: Lines: hit not hit

          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/cropprimitive2d.hxx>
      21             : #include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
      22             : #include <basegfx/matrix/b2dhommatrix.hxx>
      23             : #include <basegfx/matrix/b2dhommatrixtools.hxx>
      24             : #include <drawinglayer/primitive2d/transformprimitive2d.hxx>
      25             : #include <basegfx/polygon/b2dpolygon.hxx>
      26             : #include <basegfx/polygon/b2dpolygontools.hxx>
      27             : #include <drawinglayer/primitive2d/maskprimitive2d.hxx>
      28             : 
      29             : 
      30             : 
      31             : using namespace com::sun::star;
      32             : 
      33             : 
      34             : 
      35             : namespace drawinglayer
      36             : {
      37             :     namespace primitive2d
      38             :     {
      39           3 :         CropPrimitive2D::CropPrimitive2D(
      40             :             const Primitive2DSequence& rChildren,
      41             :             const basegfx::B2DHomMatrix& rTransformation,
      42             :             double fCropLeft,
      43             :             double fCropTop,
      44             :             double fCropRight,
      45             :             double fCropBottom)
      46             :         :   GroupPrimitive2D(rChildren),
      47             :             maTransformation(rTransformation),
      48             :             mfCropLeft(fCropLeft),
      49             :             mfCropTop(fCropTop),
      50             :             mfCropRight(fCropRight),
      51           3 :             mfCropBottom(fCropBottom)
      52             :         {
      53           3 :         }
      54             : 
      55           0 :         bool CropPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
      56             :         {
      57           0 :             if(GroupPrimitive2D::operator==(rPrimitive))
      58             :             {
      59           0 :                 const CropPrimitive2D& rCompare = static_cast< const CropPrimitive2D& >(rPrimitive);
      60             : 
      61           0 :                 return (getTransformation() == rCompare.getTransformation()
      62           0 :                     && getCropLeft() == rCompare.getCropLeft()
      63           0 :                     && getCropTop() == rCompare.getCropTop()
      64           0 :                     && getCropRight() == rCompare.getCropRight()
      65           0 :                     && getCropBottom() == rCompare.getCropBottom());
      66             :             }
      67             : 
      68           0 :             return false;
      69             :         }
      70             : 
      71           3 :         Primitive2DSequence CropPrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& /*rViewInformation*/) const
      72             :         {
      73           3 :             Primitive2DSequence xRetval;
      74             : 
      75           3 :             if(getChildren().hasElements())
      76             :             {
      77             :                 // get original object scale in unit coordinates (no mirroring)
      78           3 :                 const basegfx::B2DVector aObjectScale(basegfx::absolute(getTransformation() * basegfx::B2DVector(1.0, 1.0)));
      79             : 
      80             :                 // we handle cropping, so when no width or no height, content will be empty,
      81             :                 // so only do something when we have a width and a height
      82           3 :                 if(!aObjectScale.equalZero())
      83             :                 {
      84             :                     // calculate crop distances in unit coordinates. They are already combined with CropScaleFactor, thus
      85             :                     // are relative only to object scale
      86           3 :                     const double fBackScaleX(basegfx::fTools::equalZero(aObjectScale.getX()) ? 1.0 : 1.0 / fabs(aObjectScale.getX()));
      87           3 :                     const double fBackScaleY(basegfx::fTools::equalZero(aObjectScale.getY()) ? 1.0 : 1.0 / fabs(aObjectScale.getY()));
      88           3 :                     const double fLeft(getCropLeft() * fBackScaleX);
      89           3 :                     const double fTop(getCropTop() * fBackScaleY);
      90           3 :                     const double fRight(getCropRight() * fBackScaleX);
      91           3 :                     const double fBottom(getCropBottom() * fBackScaleY);
      92             : 
      93             :                     // calc new unit range for comparisons; the original range is the unit range
      94           3 :                     const basegfx::B2DRange aUnitRange(0.0, 0.0, 1.0, 1.0);
      95             :                     const basegfx::B2DRange aNewRange(
      96             :                         -fLeft,
      97             :                         -fTop,
      98             :                         1.0 + fRight,
      99           3 :                         1.0 + fBottom);
     100             : 
     101             :                     // if we have no overlap the crop has removed everything, so we do only
     102             :                     // have to create content if this is not the case
     103           3 :                     if(aNewRange.overlaps(aUnitRange))
     104             :                     {
     105             :                         // create new transform; first take out old transform to get
     106             :                         // to unit coordinates by inverting. Inverting should be flawless
     107             :                         // since we already cheched that object size is not zero in X or Y
     108           3 :                         basegfx::B2DHomMatrix aNewTransform(getTransformation());
     109             : 
     110           3 :                         aNewTransform.invert();
     111             : 
     112             :                         // apply crop enlargement in unit coordinates
     113             :                         aNewTransform = basegfx::tools::createScaleTranslateB2DHomMatrix(
     114             :                             aNewRange.getRange(),
     115           3 :                             aNewRange.getMinimum()) * aNewTransform;
     116             : 
     117             :                         // apply original transformation. Since we have manipulated the crop
     118             :                         // in unit coordinates we do not need to care about mirroring or
     119             :                         // a corrected point for a possible shear or rotation, this all comes for
     120             :                         // free
     121           3 :                         aNewTransform = getTransformation() * aNewTransform;
     122             : 
     123             :                         // prepare TransformPrimitive2D with xPrimitive
     124             :                         const Primitive2DReference xTransformPrimitive(
     125             :                             new TransformPrimitive2D(
     126             :                                 aNewTransform,
     127           6 :                                 getChildren()));
     128             : 
     129           3 :                         if(aUnitRange.isInside(aNewRange))
     130             :                         {
     131             :                             // the new range is completely inside the old range (unit range),
     132             :                             // so no masking is needed
     133           1 :                             xRetval = Primitive2DSequence(&xTransformPrimitive, 1);
     134             :                         }
     135             :                         else
     136             :                         {
     137             :                             // mask with original object's bounds
     138           2 :                             basegfx::B2DPolyPolygon aMaskPolyPolygon(basegfx::tools::createUnitPolygon());
     139           2 :                             aMaskPolyPolygon.transform(getTransformation());
     140             : 
     141             :                             // create maskPrimitive with aMaskPolyPolygon and aMaskContentVector
     142             :                             const Primitive2DReference xMask(
     143             :                                 new MaskPrimitive2D(
     144             :                                     aMaskPolyPolygon,
     145           4 :                                     Primitive2DSequence(&xTransformPrimitive, 1)));
     146             : 
     147           4 :                             xRetval = Primitive2DSequence(&xMask, 1);
     148           3 :                         }
     149             :                     }
     150           3 :                 }
     151             :             }
     152             : 
     153           3 :             return xRetval;
     154             :         }
     155             : 
     156             :         // provide unique ID
     157           3 :         ImplPrimitive2DIDBlock(CropPrimitive2D, PRIMITIVE2D_ID_CROPPRIMITIVE2D)
     158             : 
     159             :     } // end of namespace primitive2d
     160             : } // end of namespace drawinglayer
     161             : 
     162             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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