canvasgraphichelper.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
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#include <canvasgraphichelper.hxx>
 
#include <com/sun/star/rendering/XCanvas.hpp>
 
#include <canvas/canvastools.hxx>
#include <basegfx/utils/canvastools.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <utility>
 
 
using namespace ::com::sun::star;
 
/* Implementation of CanvasGraphicHelper class */
 
namespace cppcanvas::internal
{
        CanvasGraphicHelper::CanvasGraphicHelper( CanvasSharedPtr xParentCanvas ) :
            mpCanvas(std::move( xParentCanvas ))
        {
            OSL_ENSURE( mpCanvas && mpCanvas->getUNOCanvas().is(),
                        "CanvasGraphicHelper::CanvasGraphicHelper: no valid canvas" );
 
            ::canvas::tools::initRenderState( maRenderState );
        }
 
        void CanvasGraphicHelper::setTransformation( const ::basegfx::B2DHomMatrix& rMatrix )
        {
            ::canvas::tools::setRenderStateTransform( maRenderState, rMatrix );
        }
 
        void CanvasGraphicHelper::setClip( const ::basegfx::B2DPolyPolygon& rClipPoly )
        {
            // TODO(T3): not thread-safe. B2DPolyPolygon employs copy-on-write
            maClipPolyPolygon = rClipPoly;
            maRenderState.Clip.clear();
        }
 
        void CanvasGraphicHelper::setClip()
        {
            maClipPolyPolygon.reset();
            maRenderState.Clip.clear();
        }
 
        const rendering::RenderState& CanvasGraphicHelper::getRenderState() const
        {
            if( maClipPolyPolygon && !maRenderState.Clip.is() )
            {
                uno::Reference< rendering::XCanvas > xCanvas( mpCanvas->getUNOCanvas() );
                if( !xCanvas.is() )
                    return maRenderState;
 
                maRenderState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
                    xCanvas->getDevice(),
                    *maClipPolyPolygon );
            }
 
            return maRenderState;
        }
 
        void CanvasGraphicHelper::setCompositeOp( sal_Int8 aOp )
        {
            maRenderState.CompositeOperation = aOp;
        }
 
}
 
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