/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * 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

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#include <vcl/alpha.hxx>

#include <vcl/gdimetafiletools.hxx>

#include <vcl/metaact.hxx>

#include <vcl/metaactiontypes.hxx>

#include <vcl/canvastools.hxx>

#include <basegfx/polygon/b2dpolygonclipper.hxx>

#include <basegfx/matrix/b2dhommatrixtools.hxx>

#include <basegfx/polygon/b2dpolypolygontools.hxx>

#include <basegfx/polygon/b2dpolygontools.hxx>

#include <vcl/virdev.hxx>

#include <vcl/svapp.hxx>

#include <vcl/graphictools.hxx>

#include <osl/diagnose.h>

#include <tools/stream.hxx>

#include <tools/mapunit.hxx>

// helpers

namespace

{

    bool handleGeometricContent(

        const basegfx::B2DPolyPolygon& rClip,

        const basegfx::B2DPolyPolygon& rSource,

        GDIMetaFile& rTarget,

        bool bStroke)

    {

        if(rSource.count() && rClip.count())

        {

            const basegfx::B2DPolyPolygon aResult(

                basegfx::utils::clipPolyPolygonOnPolyPolygon(

                    rSource,

                    rClip,

                    true, // inside

                    bStroke));

            if(aResult.count())

            {

                if(aResult == rSource)

                {

                    // not clipped, but inside. Add original

                    return false;

                }

                else

                {

                    // add clipped geometry

                    if(bStroke)

                    {

                        for(auto const& rB2DPolygon : aResult)

                        {

                            rTarget.AddAction(

                                new MetaPolyLineAction(

                                        tools::Polygon(rB2DPolygon)));

                        }

                    }

                    else

                    {

                        rTarget.AddAction(

                            new MetaPolyPolygonAction(

                                tools::PolyPolygon(aResult)));

                    }

                }

            }

        }

        return true;

    }

    bool handleGradientContent(

        const basegfx::B2DPolyPolygon& rClip,

        const basegfx::B2DPolyPolygon& rSource,

        const Gradient& rGradient,

        GDIMetaFile& rTarget)

    {

        if(rSource.count() && rClip.count())

        {

            const basegfx::B2DPolyPolygon aResult(

                basegfx::utils::clipPolyPolygonOnPolyPolygon(

                    rSource,

                    rClip,

                    true, // inside

                    false)); // stroke

            if(aResult.count())

            {

                if(aResult == rSource)

                {

                    // not clipped, but inside. Add original

                    return false;

                }

                else

                {

                    // add clipped geometry

                    rTarget.AddAction(

                        new MetaGradientExAction(

                            tools::PolyPolygon(aResult),

                            rGradient));

                }

            }

        }

        return true;

    }

    bool handleBitmapContent(

        const basegfx::B2DPolyPolygon& rClip,

        const Point& rPoint,

        const Size& rSize,

        const Bitmap& rBitmap,

        GDIMetaFile& rTarget)

    {

        if(!rSize.Width() || !rSize.Height() || rBitmap.IsEmpty())

        {

            // bitmap or size is empty

            return true;

        }

        const basegfx::B2DRange aLogicBitmapRange(

            rPoint.X(), rPoint.Y(),

            rPoint.X() + rSize.Width(), rPoint.Y() + rSize.Height());

        const basegfx::B2DPolyPolygon aClipOfBitmap(

            basegfx::utils::clipPolyPolygonOnRange(

                rClip,

                aLogicBitmapRange,

                true,

                false)); // stroke

        if(!aClipOfBitmap.count())

        {

            // outside clip region

            return true;

        }

        // inside or overlapping. Use area to find out if it is completely

        // covering (inside) or overlapping

        const double fClipArea(basegfx::utils::getArea(aClipOfBitmap));

        const double fBitmapArea(

            aLogicBitmapRange.getWidth() * aLogicBitmapRange.getWidth() +

            aLogicBitmapRange.getHeight() * aLogicBitmapRange.getHeight());

        const double fFactor(fClipArea / fBitmapArea);

        if(basegfx::fTools::more(fFactor, 1.0 - 0.001))

        {

            // completely covering (with 0.1% tolerance)

            return false;

        }

        // needs clipping (with 0.1% tolerance). Prepare VirtualDevice

        // in pixel mode for alpha channel painting (black is transparent,

        // white to paint 100% opacity)

        const Size aSizePixel(rBitmap.GetSizePixel());

        ScopedVclPtrInstance< VirtualDevice > aVDev;

        aVDev->SetOutputSizePixel(aSizePixel);

        aVDev->EnableMapMode(false);

        aVDev->SetFillColor( COL_WHITE);

        aVDev->SetLineColor();

        Bitmap aColorBitmap(rBitmap);

        if(rBitmap.HasAlpha())

        {

            // use given alpha channel

            AlphaMask aAlpha;

            std::tie(aColorBitmap, aAlpha) = rBitmap.SplitIntoColorAndAlpha();

            aVDev->DrawBitmap(Point(0, 0), aAlpha.GetBitmap());

        }

        else

        {

            // reset alpha channel

            aVDev->SetBackground(Wallpaper(COL_BLACK));

            aVDev->Erase();

        }

        // transform polygon from clipping to pixel coordinates

        basegfx::B2DPolyPolygon aPixelPoly(aClipOfBitmap);

        basegfx::B2DHomMatrix aTransform;

        aTransform.translate(-aLogicBitmapRange.getMinX(), -aLogicBitmapRange.getMinY());

        aTransform.scale(

            static_cast< double >(aSizePixel.Width()) / aLogicBitmapRange.getWidth(),

            static_cast< double >(aSizePixel.Height()) / aLogicBitmapRange.getHeight());

        aPixelPoly.transform(aTransform);

        // to fill the non-covered parts, use the Xor fill rule of

        // tools::PolyPolygon painting. Start with an all-covering polygon and

        // add the clip polygon one

        basegfx::B2DPolyPolygon aInvertPixelPoly;

        aInvertPixelPoly.append(

            basegfx::utils::createPolygonFromRect(

                basegfx::B2DRange(

                    0.0, 0.0,

                    aSizePixel.Width(), aSizePixel.Height())));

        aInvertPixelPoly.append(aPixelPoly);

        // paint as alpha

        aVDev->DrawPolyPolygon(aInvertPixelPoly);

        // get created alpha mask and set defaults

        AlphaMask aAlpha(

            aVDev->GetBitmap(

                Point(0, 0),

                aSizePixel));

        aAlpha.SetPrefSize(rBitmap.GetPrefSize());

        aAlpha.SetPrefMapMode(rBitmap.GetPrefMapMode());

        // add new action replacing the old one

        rTarget.AddAction(

            new MetaBmpExScaleAction(

                Point(

                    basegfx::fround<tools::Long>(aLogicBitmapRange.getMinX()),

                    basegfx::fround<tools::Long>(aLogicBitmapRange.getMinY())),

                Size(

                    basegfx::fround<tools::Long>(aLogicBitmapRange.getWidth()),

                    basegfx::fround<tools::Long>(aLogicBitmapRange.getHeight())),

                Bitmap(aColorBitmap, aAlpha)));

        return true;

    }

    void addSvtGraphicStroke(const SvtGraphicStroke& rStroke, GDIMetaFile& rTarget)

    {

        // write SvtGraphicFill

        SvMemoryStream aMemStm;

        WriteSvtGraphicStroke( aMemStm, rStroke );

        rTarget.AddAction(

            new MetaCommentAction(

                "XPATHSTROKE_SEQ_BEGIN"_ostr,

                0,

                static_cast< const sal_uInt8* >(aMemStm.GetData()),

                aMemStm.TellEnd()));

    }

    void addSvtGraphicFill(const SvtGraphicFill &rFilling, GDIMetaFile& rTarget)

    {

        // write SvtGraphicFill

        SvMemoryStream aMemStm;

        WriteSvtGraphicFill( aMemStm, rFilling );

        rTarget.AddAction(

            new MetaCommentAction(

                "XPATHFILL_SEQ_BEGIN"_ostr,

                0,

                static_cast< const sal_uInt8* >(aMemStm.GetData()),

                aMemStm.TellEnd()));

    }

} // end of anonymous namespace

// #i121267# Tooling to internally clip geometry against internal clip regions

void clipMetafileContentAgainstOwnRegions(GDIMetaFile& rSource)

{

    const sal_uLong nObjCount(rSource.GetActionSize());

    if(!nObjCount)

    {

        return;

    }

    // prepare target data container and push/pop stack data

    GDIMetaFile aTarget;

    bool bChanged(false);

    std::vector< basegfx::B2DPolyPolygon > aClips;

    std::vector< vcl::PushFlags > aPushFlags;

    std::vector< MapMode > aMapModes;

    // start with empty region

    aClips.emplace_back();

    // start with default MapMode (MapUnit::MapPixel)

    aMapModes.emplace_back();

    for(sal_uLong i(0); i < nObjCount; ++i)

    {

        const MetaAction* pAction(rSource.GetAction(i));

        const MetaActionType nType(pAction->GetType());

        bool bDone(false);

        // basic operation takes care of clipregion actions (four) and push/pop of these

        // to steer the currently set clip region. There *is* an active

        // clip region when (aClips.size() && aClips.back().count()), see

        // below

        switch(nType)

        {

            case MetaActionType::CLIPREGION :

            {

                const MetaClipRegionAction* pA = static_cast< const MetaClipRegionAction* >(pAction);

                if(pA->IsClipping())

                {

                    const vcl::Region& rRegion = pA->GetRegion();

                    const basegfx::B2DPolyPolygon aNewClip(rRegion.GetAsB2DPolyPolygon());

                    aClips.back() = aNewClip;

                }

                else

                {

                    aClips.back() = basegfx::B2DPolyPolygon();

                }

                break;

            }

            case MetaActionType::ISECTRECTCLIPREGION :

            {

                const MetaISectRectClipRegionAction* pA = static_cast< const MetaISectRectClipRegionAction* >(pAction);

                const tools::Rectangle& rRect = pA->GetRect();

                if(!rRect.IsEmpty() && !aClips.empty() && aClips.back().count())

                {

                    const basegfx::B2DRange aClipRange(vcl::unotools::b2DRectangleFromRectangle(rRect));

                    aClips.back() = basegfx::utils::clipPolyPolygonOnRange(

                        aClips.back(),

                        aClipRange,

                        true, // inside

                        false); // stroke

                }

                break;

            }

            case MetaActionType::ISECTREGIONCLIPREGION :

            {

                const MetaISectRegionClipRegionAction* pA = static_cast< const MetaISectRegionClipRegionAction* >(pAction);

                const vcl::Region& rRegion = pA->GetRegion();

                if(!rRegion.IsEmpty() && !aClips.empty() && aClips.back().count())

                {

                    const basegfx::B2DPolyPolygon aNewClip(rRegion.GetAsB2DPolyPolygon());

                    aClips.back() = basegfx::utils::clipPolyPolygonOnPolyPolygon(

                        aClips.back(),

                        aNewClip,

                        true,  // inside

                        false); // stroke

                }

                break;

            }

            case MetaActionType::MOVECLIPREGION :

            {

                const MetaMoveClipRegionAction* pA = static_cast< const MetaMoveClipRegionAction* >(pAction);

                const tools::Long aHorMove(pA->GetHorzMove());

                const tools::Long aVerMove(pA->GetVertMove());

                if((aHorMove || aVerMove) && !aClips.empty() && aClips.back().count())

                {

                    aClips.back().translate(aHorMove, aVerMove);

                }

                break;

            }

            case MetaActionType::PUSH :

            {

                const MetaPushAction* pA = static_cast< const MetaPushAction* >(pAction);

                const vcl::PushFlags nFlags(pA->GetFlags());

                aPushFlags.push_back(nFlags);

                if(nFlags & vcl::PushFlags::CLIPREGION)

                {

                    aClips.push_back(aClips.back());

                }

                if(nFlags & vcl::PushFlags::MAPMODE)

                {

                    aMapModes.push_back(aMapModes.back());

                }

                break;

            }

            case MetaActionType::POP :

            {

                if(!aPushFlags.empty())

                {

                    const vcl::PushFlags nFlags(aPushFlags.back());

                    aPushFlags.pop_back();

                    if(nFlags & vcl::PushFlags::CLIPREGION)

                    {

                        if(aClips.size() > 1)

                        {

                            aClips.pop_back();

                        }

                        else

                        {

                            OSL_ENSURE(false, "Wrong POP() in ClipRegions (!)");

                        }

                    }

                    if(nFlags & vcl::PushFlags::MAPMODE)

                    {

                        if(aMapModes.size() > 1)

                        {

                            aMapModes.pop_back();

                        }

                        else

                        {

                            OSL_ENSURE(false, "Wrong POP() in MapModes (!)");

                        }

                    }

                }

                else

                {

                    OSL_ENSURE(false, "Invalid pop() without push() (!)");

                }

                break;

            }

            case MetaActionType::MAPMODE :

            {

                const MetaMapModeAction* pA = static_cast< const MetaMapModeAction* >(pAction);

                aMapModes.back() = pA->GetMapMode();

                break;

            }

            default:

            {

                break;

            }

        }

        // this area contains all actions which could potentially be clipped. Since

        // this tooling is only a fallback (see comments in header), only the needed

        // actions will be implemented. Extend using the pattern for the already

        // implemented actions.

        if(!aClips.empty() && aClips.back().count())

        {

            switch(nType)

            {

                // pixel actions, just check on inside

                case MetaActionType::PIXEL :

                {

                    const MetaPixelAction* pA = static_cast< const MetaPixelAction* >(pAction);

                    const Point& rPoint = pA->GetPoint();

                    if(!basegfx::utils::isInside(

                        aClips.back(),

                        basegfx::B2DPoint(rPoint.X(), rPoint.Y())))

                    {

                        // when not inside, do not add original

                        bDone = true;

                    }

                    break;

                }

                case MetaActionType::POINT :

                {

                    const MetaPointAction* pA = static_cast< const MetaPointAction* >(pAction);

                    const Point& rPoint = pA->GetPoint();

                    if(!basegfx::utils::isInside(

                        aClips.back(),

                        basegfx::B2DPoint(rPoint.X(), rPoint.Y())))

                    {

                        // when not inside, do not add original

                        bDone = true;

                    }

                    break;

                }

                // geometry actions

                case MetaActionType::LINE :

                {

                    const MetaLineAction* pA = static_cast< const MetaLineAction* >(pAction);

                    const Point& rStart(pA->GetStartPoint());

                    const Point& rEnd(pA->GetEndPoint());

                    basegfx::B2DPolygon aLine;

                    aLine.append(basegfx::B2DPoint(rStart.X(), rStart.Y()));

                    aLine.append(basegfx::B2DPoint(rEnd.X(), rEnd.Y()));

                    bDone = handleGeometricContent(

                        aClips.back(),

                        basegfx::B2DPolyPolygon(aLine),

                        aTarget,

                        true); // stroke

                    break;

                }

                case MetaActionType::RECT :

                {

                    const MetaRectAction* pA = static_cast< const MetaRectAction* >(pAction);

                    const tools::Rectangle& rRect = pA->GetRect();

                    if(rRect.IsEmpty())

                    {

                        bDone = true;

                    }

                    else

                    {

                        bDone = handleGeometricContent(

                            aClips.back(),

                            basegfx::B2DPolyPolygon(

                                basegfx::utils::createPolygonFromRect(

                                        vcl::unotools::b2DRectangleFromRectangle(rRect))),

                            aTarget,

                            false); // stroke

                    }

                    break;

                }

                case MetaActionType::ROUNDRECT :

                {

                    const MetaRoundRectAction* pA = static_cast< const MetaRoundRectAction* >(pAction);

                    const tools::Rectangle& rRect = pA->GetRect();

                    if(rRect.IsEmpty())

                    {

                        bDone = true;

                    }

                    else

                    {

                        const sal_uInt32 nHor(pA->GetHorzRound());

                        const sal_uInt32 nVer(pA->GetVertRound());

                        const basegfx::B2DRange aRange(vcl::unotools::b2DRectangleFromRectangle(rRect));

                        basegfx::B2DPolygon aOutline;

                        if(nHor || nVer)

                        {

                            double fRadiusX((nHor * 2.0) / (aRange.getWidth() > 0.0 ? aRange.getWidth() : 1.0));

                            double fRadiusY((nVer * 2.0) / (aRange.getHeight() > 0.0 ? aRange.getHeight() : 1.0));

                            fRadiusX = std::clamp(fRadiusX, 0.0, 1.0);

                            fRadiusY = std::clamp(fRadiusY, 0.0, 1.0);

                            aOutline = basegfx::utils::createPolygonFromRect(aRange, fRadiusX, fRadiusY);

                        }

                        else

                        {

                            aOutline = basegfx::utils::createPolygonFromRect(aRange);

                        }

                        bDone = handleGeometricContent(

                            aClips.back(),

                            basegfx::B2DPolyPolygon(aOutline),

                            aTarget,

                            false); // stroke

                    }

                    break;

                }

                case MetaActionType::ELLIPSE :

                {

                    const MetaEllipseAction* pA = static_cast< const MetaEllipseAction* >(pAction);

                    const tools::Rectangle& rRect = pA->GetRect();

                    if(rRect.IsEmpty())

                    {

                        bDone = true;

                    }

                    else

                    {

                        const basegfx::B2DRange aRange(vcl::unotools::b2DRectangleFromRectangle(rRect));

                        bDone = handleGeometricContent(

                            aClips.back(),

                            basegfx::B2DPolyPolygon(

                                basegfx::utils::createPolygonFromEllipse(

                                    aRange.getCenter(),

                                    aRange.getWidth() * 0.5,

                                    aRange.getHeight() * 0.5)),

                            aTarget,

                            false); // stroke

                    }

                    break;

                }

                case MetaActionType::ARC :

                {

                    const MetaArcAction* pA = static_cast< const MetaArcAction* >(pAction);

                    const tools::Rectangle& rRect = pA->GetRect();

                    if(rRect.IsEmpty())

                    {

                        bDone = true;

                    }

                    else

                    {

                        const tools::Polygon aToolsPoly(

                                rRect,

                                pA->GetStartPoint(),

                                pA->GetEndPoint(),

                                PolyStyle::Arc);

                        bDone = handleGeometricContent(

                            aClips.back(),

                            basegfx::B2DPolyPolygon(aToolsPoly.getB2DPolygon()),

                            aTarget,

                            true); // stroke

                    }

                    break;

                }

                case MetaActionType::PIE :

                {

                    const MetaPieAction* pA = static_cast< const MetaPieAction* >(pAction);

                    const tools::Rectangle& rRect = pA->GetRect();

                    if(rRect.IsEmpty())

                    {

                        bDone = true;

                    }

                    else

                    {

                        const tools::Polygon aToolsPoly(

                                rRect,

                                pA->GetStartPoint(),

                                pA->GetEndPoint(),

                                PolyStyle::Pie);

                        bDone = handleGeometricContent(

                            aClips.back(),

                            basegfx::B2DPolyPolygon(aToolsPoly.getB2DPolygon()),

                            aTarget,

                            false); // stroke

                    }

                    break;

                }

                case MetaActionType::CHORD :

                {

                    const MetaChordAction* pA = static_cast< const MetaChordAction* >(pAction);

                    const tools::Rectangle& rRect = pA->GetRect();

                    if(rRect.IsEmpty())

                    {

                        bDone = true;

                    }

                    else

                    {

                        const tools::Polygon aToolsPoly(

                                rRect,

                                pA->GetStartPoint(),

                                pA->GetEndPoint(),

                                PolyStyle::Chord);

                        bDone = handleGeometricContent(

                            aClips.back(),

                            basegfx::B2DPolyPolygon(aToolsPoly.getB2DPolygon()),

                            aTarget,

                            false); // stroke

                    }

                    break;

                }

                case MetaActionType::POLYLINE :

                {

                    const MetaPolyLineAction* pA = static_cast< const MetaPolyLineAction* >(pAction);

                    bDone = handleGeometricContent(

                        aClips.back(),

                        basegfx::B2DPolyPolygon(pA->GetPolygon().getB2DPolygon()),

                        aTarget,

                        true); // stroke

                    break;

                }

                case MetaActionType::POLYGON :

                {

                    const MetaPolygonAction* pA = static_cast< const MetaPolygonAction* >(pAction);

                    bDone = handleGeometricContent(

                        aClips.back(),

                        basegfx::B2DPolyPolygon(pA->GetPolygon().getB2DPolygon()),

                        aTarget,

                        false); // stroke

                    break;

                }

                case MetaActionType::POLYPOLYGON :

                {

                    const MetaPolyPolygonAction* pA = static_cast< const MetaPolyPolygonAction* >(pAction);

                    const tools::PolyPolygon& rPoly = pA->GetPolyPolygon();

                    bDone = handleGeometricContent(

                        aClips.back(),

                        rPoly.getB2DPolyPolygon(),

                        aTarget,

                        false); // stroke

                    break;

                }

                // bitmap actions, create Bitmap with alpha channel derived

                // from clipping

                case MetaActionType::BMPEX :

                {

                    const MetaBmpExAction* pA = static_cast< const MetaBmpExAction* >(pAction);

                    const Bitmap& rBitmap = pA->GetBitmap();

                    // the logical size depends on the PrefSize of the given bitmap in

                    // combination with the current MapMode

                    Size aLogicalSize(rBitmap.GetPrefSize());

                    if(MapUnit::MapPixel == rBitmap.GetPrefMapMode().GetMapUnit())

                    {

                        aLogicalSize = Application::GetDefaultDevice()->PixelToLogic(aLogicalSize, aMapModes.back());

                    }

                    else

                    {

                        aLogicalSize = OutputDevice::LogicToLogic(aLogicalSize, rBitmap.GetPrefMapMode(), aMapModes.back());

                    }

                    bDone = handleBitmapContent(

                        aClips.back(),

                        pA->GetPoint(),

                        aLogicalSize,

                        rBitmap,

                        aTarget);

                    break;

                }

                case MetaActionType::BMP :

                {

                    const MetaBmpAction* pA = static_cast< const MetaBmpAction* >(pAction);

                    const Bitmap& rBitmap = pA->GetBitmap();

                    // the logical size depends on the PrefSize of the given bitmap in

                    // combination with the current MapMode

                    Size aLogicalSize(rBitmap.GetPrefSize());

                    if(MapUnit::MapPixel == rBitmap.GetPrefMapMode().GetMapUnit())

                    {

                        aLogicalSize = Application::GetDefaultDevice()->PixelToLogic(aLogicalSize, aMapModes.back());

                    }

                    else

                    {

                        aLogicalSize = OutputDevice::LogicToLogic(aLogicalSize, rBitmap.GetPrefMapMode(), aMapModes.back());

                    }

                    bDone = handleBitmapContent(

                        aClips.back(),

                        pA->GetPoint(),

                        aLogicalSize,

                        rBitmap,

                        aTarget);

                    break;

                }

                case MetaActionType::BMPEXSCALE :

                {

                    const MetaBmpExScaleAction* pA = static_cast< const MetaBmpExScaleAction* >(pAction);

                    bDone = handleBitmapContent(

                        aClips.back(),

                        pA->GetPoint(),

                        pA->GetSize(),

                        pA->GetBitmap(),

                        aTarget);

                    break;

                }

                case MetaActionType::BMPSCALE :

                {

                    const MetaBmpScaleAction* pA = static_cast< const MetaBmpScaleAction* >(pAction);

                    bDone = handleBitmapContent(

                        aClips.back(),

                        pA->GetPoint(),

                        pA->GetSize(),

                        pA->GetBitmap(),

                        aTarget);

                    break;

                }

                case MetaActionType::BMPEXSCALEPART :

                {

                    const MetaBmpExScalePartAction* pA = static_cast< const MetaBmpExScalePartAction* >(pAction);

                    const Bitmap& rBitmap = pA->GetBitmap();

                    if(rBitmap.IsEmpty())

                    {

                        // empty content

                        bDone = true;

                    }

                    else

                    {

                        Bitmap aCroppedBitmap(rBitmap);

                        const tools::Rectangle aCropRectangle(pA->GetSrcPoint(), pA->GetSrcSize());

                        if(aCropRectangle.IsEmpty())

                        {

                            // empty content

                            bDone = true;

                        }

                        else

                        {

                            aCroppedBitmap.Crop(aCropRectangle);

                            bDone = handleBitmapContent(

                                aClips.back(),

                                pA->GetDestPoint(),

                                pA->GetDestSize(),

                                aCroppedBitmap,

                                aTarget);

                        }

                    }

                    break;

                }

                case MetaActionType::BMPSCALEPART :

                {

                    const MetaBmpScalePartAction* pA = static_cast< const MetaBmpScalePartAction* >(pAction);

                    const Bitmap& rBitmap = pA->GetBitmap();

                    if(rBitmap.IsEmpty())

                    {

                        // empty content

                        bDone = true;

                    }

                    else

                    {

                        Bitmap aCroppedBitmap(rBitmap);

                        const tools::Rectangle aCropRectangle(pA->GetSrcPoint(), pA->GetSrcSize());

                        if(aCropRectangle.IsEmpty())

                        {

                            // empty content

                            bDone = true;

                        }

                        else

                        {

                            aCroppedBitmap.Crop(aCropRectangle);

                            bDone = handleBitmapContent(

                                aClips.back(),

                                pA->GetDestPoint(),

                                pA->GetDestSize(),

                                aCroppedBitmap,

                                aTarget);

                        }

                    }

                    break;

                }

                // need to handle all those 'hacks' which hide data in comments

                case MetaActionType::COMMENT :

                {

                    const MetaCommentAction* pA = static_cast< const MetaCommentAction* >(pAction);

                    const OString& rComment = pA->GetComment();

                    if(rComment.equalsIgnoreAsciiCase("XGRAD_SEQ_BEGIN"))

                    {

                        // nothing to do; this just means that between here and XGRAD_SEQ_END

                        // there exists a MetaActionType::GRADIENTEX mixed with Xor-tricked painting

                        // commands. This comment is used to scan over these and filter for

                        // the gradient action. It is needed to support MetaActionType::GRADIENTEX

                        // in this processor to solve usages.

                    }

                    else if(rComment.equalsIgnoreAsciiCase("XPATHFILL_SEQ_BEGIN"))

                    {

                        SvtGraphicFill aFilling;

                        tools::PolyPolygon aPath;

                        {   // read SvtGraphicFill

                            SvMemoryStream aMemStm(const_cast<sal_uInt8 *>(pA->GetData()), pA->GetDataSize(),StreamMode::READ);

                            ReadSvtGraphicFill( aMemStm, aFilling );

                        }

                        aFilling.getPath(aPath);

                        if(aPath.Count())

                        {

                            const basegfx::B2DPolyPolygon aSource(aPath.getB2DPolyPolygon());

                            const basegfx::B2DPolyPolygon aResult(

                                basegfx::utils::clipPolyPolygonOnPolyPolygon(

                                    aSource,

                                    aClips.back(),

                                    true, // inside

                                    false)); // stroke

                            if(aResult.count())

                            {

                                if(aResult != aSource)

                                {

                                    // add clipped geometry

                                    aFilling.setPath(tools::PolyPolygon(aResult));

                                    addSvtGraphicFill(aFilling, aTarget);

                                    bDone = true;

                                }