/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * $RCSfile: canvasgraphichelper.cxx,v $
 * $Revision: 1.11 $
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_cppcanvas.hxx"

#include <canvasgraphichelper.hxx>

#include <com/sun/star/rendering/XGraphicDevice.hpp>
#include <com/sun/star/rendering/XCanvas.hpp>
#include <com/sun/star/rendering/XPolyPolygon2D.hpp>

#include <canvas/canvastools.hxx>
#include <basegfx/tools/canvastools.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>

#include <cppcanvas/polypolygon.hxx>
#include "tools.hxx"


using namespace ::com::sun::star;

/* Implementation of CanvasGraphicHelper class */

namespace cppcanvas
{

    namespace internal
    {
        CanvasGraphicHelper::CanvasGraphicHelper( const CanvasSharedPtr& rParentCanvas ) :
            maClipPolyPolygon(),
            mpCanvas( rParentCanvas ),
            mxGraphicDevice()
        {
            OSL_ENSURE( mpCanvas.get() != NULL &&
                        mpCanvas->getUNOCanvas().is(),
                        "CanvasGraphicHelper::CanvasGraphicHelper: no valid canvas" );

            if( mpCanvas.get() != NULL &&
                mpCanvas->getUNOCanvas().is() )
            {
                mxGraphicDevice = mpCanvas->getUNOCanvas()->getDevice();
            }

            ::canvas::tools::initRenderState( maRenderState );
        }

        void CanvasGraphicHelper::setTransformation( const ::basegfx::B2DHomMatrix& rMatrix )
        {
            ::canvas::tools::setRenderStateTransform( maRenderState, rMatrix );
        }

        ::basegfx::B2DHomMatrix CanvasGraphicHelper::getTransformation() const
        {
            ::basegfx::B2DHomMatrix aMatrix;
            return ::canvas::tools::getRenderStateTransform( aMatrix,
                                                             maRenderState );
        }

        void CanvasGraphicHelper::setClip( const ::basegfx::B2DPolyPolygon& rClipPoly )
        {
            // TODO(T3): not thread-safe. B2DPolyPolygon employs copy-on-write
            maClipPolyPolygon.reset( rClipPoly );
            maRenderState.Clip.clear();
        }

        void CanvasGraphicHelper::setClip()
        {
            maClipPolyPolygon.reset();
            maRenderState.Clip.clear();
        }

        ::basegfx::B2DPolyPolygon const* CanvasGraphicHelper::getClip() const
        {
            return !maClipPolyPolygon ? NULL : &(*maClipPolyPolygon);
        }

        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::setRGBAColor( Color::IntSRGBA aColor )
        {
            maRenderState.DeviceColor = tools::intSRGBAToDoubleSequence( mxGraphicDevice,
                                                                         aColor );
        }

        Color::IntSRGBA CanvasGraphicHelper::getRGBAColor() const
        {
            return tools::doubleSequenceToIntSRGBA( mxGraphicDevice,
                                                    maRenderState.DeviceColor );
        }

        void CanvasGraphicHelper::setCompositeOp( CompositeOp aOp )
        {
            maRenderState.CompositeOperation = (sal_Int8)aOp;
        }

        CanvasGraphic::CompositeOp CanvasGraphicHelper::getCompositeOp() const
        {
            return static_cast<CompositeOp>(maRenderState.CompositeOperation);
        }

        CanvasSharedPtr CanvasGraphicHelper::getCanvas() const
        {
            return mpCanvas;
        }

        uno::Reference< rendering::XGraphicDevice > CanvasGraphicHelper::getGraphicDevice() const
        {
            return mxGraphicDevice;
        }

    }
}