Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1086 insertions, 0 deletions

diff --git a/vcl/source/gdi/gdimetafiletools.cxx b/vcl/source/gdi/gdimetafiletools.cxx
new file mode 100644
index 000000000..6a74c4d69
--- /dev/null
+++ b/vcl/source/gdi/gdimetafiletools.cxx
@@ -0,0 +1,1086 @@
+/* -*- 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/gdimetafiletools.hxx>
+#include <vcl/metaact.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>
+
+// 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 BitmapEx& rBitmapEx,
+        GDIMetaFile& rTarget)
+    {
+        if(!rSize.Width() || !rSize.Height() || rBitmapEx.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(rBitmapEx.GetSizePixel());
+        ScopedVclPtrInstance< VirtualDevice > aVDev;
+
+        aVDev->SetOutputSizePixel(aSizePixel);
+        aVDev->EnableMapMode(false);
+        aVDev->SetFillColor( COL_WHITE);
+        aVDev->SetLineColor();
+
+        if(rBitmapEx.IsTransparent())
+        {
+            // use given alpha channel
+            aVDev->DrawBitmap(Point(0, 0), rBitmapEx.GetAlpha().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(rBitmapEx.GetPrefSize());
+        aAlpha.SetPrefMapMode(rBitmapEx.GetPrefMapMode());
+
+        // add new action replacing the old one
+        rTarget.AddAction(
+            new MetaBmpExScaleAction(
+                Point(
+                    basegfx::fround(aLogicBitmapRange.getMinX()),
+                    basegfx::fround(aLogicBitmapRange.getMinY())),
+                Size(
+                    basegfx::fround(aLogicBitmapRange.getWidth()),
+                    basegfx::fround(aLogicBitmapRange.getHeight())),
+                BitmapEx(rBitmapEx.GetBitmap(), aAlpha)));
+
+        return true;
+    }
+
+    void addSvtGraphicStroke(const SvtGraphicStroke& rStroke, GDIMetaFile& rTarget)
+    {
+        // write SvtGraphicFill
+        SvMemoryStream aMemStm;
+        WriteSvtGraphicStroke( aMemStm, rStroke );
+        rTarget.AddAction(
+            new MetaCommentAction(
+                "XPATHSTROKE_SEQ_BEGIN",
+                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",
+                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< 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 long aHorMove(pA->GetHorzMove());
+                const long aVerMove(pA->GetVertMove());
+
+                if((aHorMove || aVerMove) && !aClips.empty() && aClips.back().count())
+                {
+                    aClips.back().transform(
+                        basegfx::utils::createTranslateB2DHomMatrix(
+                            aHorMove,
+                            aVerMove));
+                }
+                break;
+            }
+
+            case MetaActionType::PUSH :
+            {
+                const MetaPushAction* pA = static_cast< const MetaPushAction* >(pAction);
+                const PushFlags nFlags(pA->GetFlags());
+
+                aPushFlags.push_back(nFlags);
+
+                if(nFlags & PushFlags::CLIPREGION)
+                {
+                    aClips.push_back(aClips.back());
+                }
+
+                if(nFlags & PushFlags::MAPMODE)
+                {
+                    aMapModes.push_back(aMapModes.back());
+                }
+                break;
+            }
+
+            case MetaActionType::POP :
+            {
+
+                if(!aPushFlags.empty())
+                {
+                    const PushFlags nFlags(aPushFlags.back());
+                    aPushFlags.pop_back();
+
+                    if(nFlags & PushFlags::CLIPREGION)
+                    {
+                        if(aClips.size() > 1)
+                        {
+                            aClips.pop_back();
+                        }
+                        else
+                        {
+                            OSL_ENSURE(false, "Wrong POP() in ClipRegions (!)");
+                        }
+                    }
+
+                    if(nFlags & 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::max(0.0, std::min(1.0, fRadiusX));
+                            fRadiusY = std::max(0.0, std::min(1.0, fRadiusY));
+
+                            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 BitmapEx with alpha channel derived
+                // from clipping
+
+                case MetaActionType::BMPEX :
+                {
+                    const MetaBmpExAction* pA = static_cast< const MetaBmpExAction* >(pAction);
+                    const BitmapEx& rBitmapEx = pA->GetBitmapEx();
+
+                    // the logical size depends on the PrefSize of the given bitmap in
+                    // combination with the current MapMode
+                    Size aLogicalSize(rBitmapEx.GetPrefSize());
+
+                    if(MapUnit::MapPixel == rBitmapEx.GetPrefMapMode().GetMapUnit())
+                    {
+                        aLogicalSize = Application::GetDefaultDevice()->PixelToLogic(aLogicalSize, aMapModes.back());
+                    }
+                    else
+                    {
+                        aLogicalSize = OutputDevice::LogicToLogic(aLogicalSize, rBitmapEx.GetPrefMapMode(), aMapModes.back());
+                    }
+
+                    bDone = handleBitmapContent(
+                        aClips.back(),
+                        pA->GetPoint(),
+                        aLogicalSize,
+                        rBitmapEx,
+                        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,
+                        BitmapEx(rBitmap),
+                        aTarget);
+                    break;
+                }
+
+                case MetaActionType::BMPEXSCALE :
+                {
+                    const MetaBmpExScaleAction* pA = static_cast< const MetaBmpExScaleAction* >(pAction);
+
+                    bDone = handleBitmapContent(
+                        aClips.back(),
+                        pA->GetPoint(),
+                        pA->GetSize(),
+                        pA->GetBitmapEx(),
+                        aTarget);
+                    break;
+                }
+
+                case MetaActionType::BMPSCALE :
+                {
+                    const MetaBmpScaleAction* pA = static_cast< const MetaBmpScaleAction* >(pAction);
+
+                    bDone = handleBitmapContent(
+                        aClips.back(),
+                        pA->GetPoint(),
+                        pA->GetSize(),
+                        BitmapEx(pA->GetBitmap()),
+                        aTarget);
+                    break;
+                }
+
+                case MetaActionType::BMPEXSCALEPART :
+                {
+                    const MetaBmpExScalePartAction* pA = static_cast< const MetaBmpExScalePartAction* >(pAction);
+                    const BitmapEx& rBitmapEx = pA->GetBitmapEx();
+
+                    if(rBitmapEx.IsEmpty())
+                    {
+                        // empty content
+                        bDone = true;
+                    }
+                    else
+                    {
+                        BitmapEx aCroppedBitmapEx(rBitmapEx);
+                        const tools::Rectangle aCropRectangle(pA->GetSrcPoint(), pA->GetSrcSize());
+
+                        if(aCropRectangle.IsEmpty())
+                        {
+                            // empty content
+                            bDone = true;
+                        }
+                        else
+                        {
+                            aCroppedBitmapEx.Crop(aCropRectangle);
+                            bDone = handleBitmapContent(
+                                aClips.back(),
+                                pA->GetDestPoint(),
+                                pA->GetDestSize(),
+                                aCroppedBitmapEx,
+                                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(),
+                                BitmapEx(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
+                        // 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;
+                                }
+                            }
+                            else
+                            {
+                                // exchange with empty polygon
+                                aFilling.setPath(tools::PolyPolygon());
+                                addSvtGraphicFill(aFilling, aTarget);
+                                bDone = true;
+                            }
+                        }
+                    }
+                    else if(rComment.equalsIgnoreAsciiCase("XPATHSTROKE_SEQ_BEGIN"))
+                    {
+                        SvtGraphicStroke aStroke;
+                        tools::Polygon aPath;
+
+                        {   // read SvtGraphicFill
+                            SvMemoryStream aMemStm(const_cast<sal_uInt8 *>(pA->GetData()), pA->GetDataSize(),StreamMode::READ);
+                            ReadSvtGraphicStroke( aMemStm, aStroke );
+                        }
+
+                        aStroke.getPath(aPath);
+
+                        if(aPath.GetSize())
+                        {
+                            const basegfx::B2DPolygon aSource(aPath.getB2DPolygon());
+                            const basegfx::B2DPolyPolygon aResult(
+                                basegfx::utils::clipPolygonOnPolyPolygon(
+                                    aSource,
+                                    aClips.back(),
+                                    true, // inside
+                                    true)); // stroke
+
+                            if(aResult.count())
+                            {
+                                if(aResult.count() > 1 || aResult.getB2DPolygon(0) != aSource)
+                                {
+                                    // add clipped geometry
+                                    for(auto const& rB2DPolygon : aResult)
+                                    {
+                                        aStroke.setPath(tools::Polygon(rB2DPolygon));
+                                        addSvtGraphicStroke(aStroke, aTarget);
+                                    }
+
+                                    bDone = true;
+                                }
+                            }
+                            else
+                            {
+                                // exchange with empty polygon
+                                aStroke.setPath(tools::Polygon());
+                                addSvtGraphicStroke(aStroke, aTarget);
+                                bDone = true;
+                            }
+
+                        }
+                    }
+                    break;
+                }
+
+                // need to handle gradient fills (hopefully only unrotated ones)
+
+                case MetaActionType::GRADIENT :
+                {
+                    const MetaGradientAction* pA = static_cast< const MetaGradientAction* >(pAction);
+                    const tools::Rectangle& rRect = pA->GetRect();
+
+                    if(rRect.IsEmpty())
+                    {
+                        bDone = true;
+                    }
+                    else
+                    {
+                        bDone = handleGradientContent(
+                            aClips.back(),
+                            basegfx::B2DPolyPolygon(
+                                basegfx::utils::createPolygonFromRect(
+                                        vcl::unotools::b2DRectangleFromRectangle(rRect))),
+                            pA->GetGradient(),
+                            aTarget);
+                    }
+
+                    break;
+                }
+
+                case MetaActionType::GRADIENTEX :
+                {
+                    const MetaGradientExAction* pA = static_cast< const MetaGradientExAction* >(pAction);
+                    const tools::PolyPolygon& rPolyPoly = pA->GetPolyPolygon();
+
+                    bDone = handleGradientContent(
+                        aClips.back(),
+                        rPolyPoly.getB2DPolyPolygon(),
+                        pA->GetGradient(),
+                        aTarget);
+                    break;
+                }
+
+                // not (yet) supported actions
+
+                // MetaActionType::NONE
+                // MetaActionType::TEXT
+                // MetaActionType::TEXTARRAY
+                // MetaActionType::STRETCHTEXT
+                // MetaActionType::TEXTRECT
+                // MetaActionType::MASK
+                // MetaActionType::MASKSCALE
+                // MetaActionType::MASKSCALEPART
+                // MetaActionType::HATCH
+                // MetaActionType::WALLPAPER
+                // MetaActionType::FILLCOLOR
+                // MetaActionType::TEXTCOLOR
+                // MetaActionType::TEXTFILLCOLOR
+                // MetaActionType::TEXTALIGN
+                // MetaActionType::MAPMODE
+                // MetaActionType::FONT
+                // MetaActionType::Transparent
+                // MetaActionType::EPS
+                // MetaActionType::REFPOINT
+                // MetaActionType::TEXTLINECOLOR
+                // MetaActionType::TEXTLINE
+                // MetaActionType::FLOATTRANSPARENT
+                // MetaActionType::LAYOUTMODE
+                // MetaActionType::TEXTLANGUAGE
+                // MetaActionType::OVERLINECOLOR
+
+                // if an action is not handled at all, it will simply get copied to the
+                // target (see below). This is the default for all non-implemented actions
+                default:
+                {
+                    break;
+                }
+            }
+        }
+
+        if(bDone)
+        {
+            bChanged = true;
+        }
+        else
+        {
+            aTarget.AddAction(const_cast< MetaAction* >(pAction));
+        }
+    }
+
+    if(bChanged)
+    {
+        // when changed, copy back and do not forget to set MapMode
+        // and PrefSize
+        aTarget.SetPrefMapMode(rSource.GetPrefMapMode());
+        aTarget.SetPrefSize(rSource.GetPrefSize());
+        rSource = aTarget;
+    }
+}
+
+bool usesClipActions(const GDIMetaFile& rSource)
+{
+    const sal_uLong nObjCount(rSource.GetActionSize());
+
+    for(sal_uLong i(0); i < nObjCount; ++i)
+    {
+        const MetaAction* pAction(rSource.GetAction(i));
+        const MetaActionType nType(pAction->GetType());
+
+        switch(nType)
+        {
+            case MetaActionType::CLIPREGION :
+            case MetaActionType::ISECTRECTCLIPREGION :
+            case MetaActionType::ISECTREGIONCLIPREGION :
+            case MetaActionType::MOVECLIPREGION :
+            {
+                return true;
+            }
+
+            default: break;
+        }
+    }
+
+    return false;
+}
+
+MetafileAccessor::~MetafileAccessor()
+{
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */