cppcanvas/source/tools/canvasgraphichelper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   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
  21 #include <canvasgraphichelper.hxx>
  22
  23 #include <com/sun/star/rendering/XGraphicDevice.hpp>
  24 #include <com/sun/star/rendering/XCanvas.hpp>
  25 #include <com/sun/star/rendering/XPolyPolygon2D.hpp>
  26
  27 #include <canvas/canvastools.hxx>
  28 #include <basegfx/utils/canvastools.hxx>
  29 #include <basegfx/matrix/b2dhommatrix.hxx>
  30
  31 #include <cppcanvas/polypolygon.hxx>
  32 #include <tools.hxx>
  33
  34
  35 using namespace ::com::sun::star;
  36
  37 /* Implementation of CanvasGraphicHelper class */
  38
  39 namespace cppcanvas
  40 {
  41
  42     namespace internal
  43     {
  44         CanvasGraphicHelper::CanvasGraphicHelper( const CanvasSharedPtr& rParentCanvas ) :
  45             maClipPolyPolygon(),
  46             mpCanvas( rParentCanvas )
  47         {
  48             OSL_ENSURE( mpCanvas.get() != nullptr &&
  49                         mpCanvas->getUNOCanvas().is(),
  50                         "CanvasGraphicHelper::CanvasGraphicHelper: no valid canvas" );
  51
  52             ::canvas::tools::initRenderState( maRenderState );
  53         }
  54
  55         void CanvasGraphicHelper::setTransformation( const ::basegfx::B2DHomMatrix& rMatrix )
  56         {
  57             ::canvas::tools::setRenderStateTransform( maRenderState, rMatrix );
  58         }
  59
  60         void CanvasGraphicHelper::setClip( const ::basegfx::B2DPolyPolygon& rClipPoly )
  61         {
  62             // TODO(T3): not thread-safe. B2DPolyPolygon employs copy-on-write
  63             maClipPolyPolygon.reset( rClipPoly );
  64             maRenderState.Clip.clear();
  65         }
  66
  67         void CanvasGraphicHelper::setClip()
  68         {
  69             maClipPolyPolygon.reset();
  70             maRenderState.Clip.clear();
  71         }
  72
  73         const rendering::RenderState& CanvasGraphicHelper::getRenderState() const
  74         {
  75             if( maClipPolyPolygon && !maRenderState.Clip.is() )
  76             {
  77                 uno::Reference< rendering::XCanvas > xCanvas( mpCanvas->getUNOCanvas() );
  78                 if( !xCanvas.is() )
  79                     return maRenderState;
  80
  81                 maRenderState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
  82                     xCanvas->getDevice(),
  83                     *maClipPolyPolygon );
  84             }
  85
  86             return maRenderState;
  87         }
  88
  89         void CanvasGraphicHelper::setCompositeOp( sal_Int8 aOp )
  90         {
  91             maRenderState.CompositeOperation = aOp;
  92         }
  93
  94     }
  95 }
  96
  97 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */