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/XCanvas.hpp>
  24
  25 #include <canvas/canvastools.hxx>
  26 #include <basegfx/utils/canvastools.hxx>
  27 #include <basegfx/matrix/b2dhommatrix.hxx>
  28 #include <osl/diagnose.h>
  29 #include <utility>
  30
  31
  32 using namespace ::com::sun::star;
  33
  34 /* Implementation of CanvasGraphicHelper class */
  35
  36 namespace cppcanvas::internal
  37 {
  38         CanvasGraphicHelper::CanvasGraphicHelper( CanvasSharedPtr xParentCanvas ) :
  39             mpCanvas(std::move( xParentCanvas ))
  40         {
  41             OSL_ENSURE( mpCanvas && mpCanvas->getUNOCanvas().is(),
  42                         "CanvasGraphicHelper::CanvasGraphicHelper: no valid canvas" );
  43
  44             ::canvas::tools::initRenderState( maRenderState );
  45         }
  46
  47         void CanvasGraphicHelper::setTransformation( const ::basegfx::B2DHomMatrix& rMatrix )
  48         {
  49             ::canvas::tools::setRenderStateTransform( maRenderState, rMatrix );
  50         }
  51
  52         void CanvasGraphicHelper::setClip( const ::basegfx::B2DPolyPolygon& rClipPoly )
  53         {
  54             // TODO(T3): not thread-safe. B2DPolyPolygon employs copy-on-write
  55             maClipPolyPolygon = rClipPoly;
  56             maRenderState.Clip.clear();
  57         }
  58
  59         void CanvasGraphicHelper::setClip()
  60         {
  61             maClipPolyPolygon.reset();
  62             maRenderState.Clip.clear();
  63         }
  64
  65         const rendering::RenderState& CanvasGraphicHelper::getRenderState() const
  66         {
  67             if( maClipPolyPolygon && !maRenderState.Clip.is() )
  68             {
  69                 uno::Reference< rendering::XCanvas > xCanvas( mpCanvas->getUNOCanvas() );
  70                 if( !xCanvas.is() )
  71                     return maRenderState;
  72
  73                 maRenderState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
  74                     xCanvas->getDevice(),
  75                     *maClipPolyPolygon );
  76             }
  77
  78             return maRenderState;
  79         }
  80
  81         void CanvasGraphicHelper::setCompositeOp( sal_Int8 aOp )
  82         {
  83             maRenderState.CompositeOperation = aOp;
  84         }
  85
  86 }
  87
  88 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */