Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

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

1 files changed, 629 insertions, 0 deletions

diff --git a/canvas/source/directx/dx_impltools.cxx b/canvas/source/directx/dx_impltools.cxx
new file mode 100644
index 000000000..7f464a851
--- /dev/null
+++ b/canvas/source/directx/dx_impltools.cxx
@@ -0,0 +1,629 @@
+/* -*- 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 <sal/config.h>
+
+#include <algorithm>
+#include <memory>
+#include <vector>
+
+
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/range/b2drectangle.hxx>
+#include <basegfx/range/b2irectangle.hxx>
+#include <basegfx/utils/canvastools.hxx>
+#include <com/sun/star/geometry/IntegerRectangle2D.hpp>
+#include <com/sun/star/geometry/RealPoint2D.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <tools/diagnose_ex.h>
+
+#include <canvas/canvastools.hxx>
+#include <verifyinput.hxx>
+
+#include "dx_canvas.hxx"
+#include "dx_canvasbitmap.hxx"
+#include "dx_canvasfont.hxx"
+#include "dx_impltools.hxx"
+#include "dx_linepolypolygon.hxx"
+#include "dx_spritecanvas.hxx"
+#include "dx_vcltools.hxx"
+
+
+using namespace ::com::sun::star;
+
+
+namespace dxcanvas::tools
+{
+        ::basegfx::B2DPolyPolygon polyPolygonFromXPolyPolygon2D( const uno::Reference< rendering::XPolyPolygon2D >& xPoly )
+        {
+            LinePolyPolygon* pPolyImpl = dynamic_cast< LinePolyPolygon* >( xPoly.get() );
+
+            if( pPolyImpl )
+            {
+                return pPolyImpl->getPolyPolygon();
+            }
+            else
+            {
+                const sal_Int32 nPolys( xPoly->getNumberOfPolygons() );
+
+                // not a known implementation object - try data source
+                // interfaces
+                uno::Reference< rendering::XBezierPolyPolygon2D > xBezierPoly(
+                    xPoly,
+                    uno::UNO_QUERY );
+
+                if( xBezierPoly.is() )
+                {
+                    return ::basegfx::unotools::polyPolygonFromBezier2DSequenceSequence(
+                        xBezierPoly->getBezierSegments( 0,
+                                                        nPolys,
+                                                        0,
+                                                        -1 ) );
+                }
+                else
+                {
+                    uno::Reference< rendering::XLinePolyPolygon2D > xLinePoly(
+                        xPoly,
+                        uno::UNO_QUERY );
+
+                    // no implementation class and no data provider
+                    // found - contract violation.
+                    ENSURE_ARG_OR_THROW( xLinePoly.is(),
+                                     "VCLCanvas::polyPolygonFromXPolyPolygon2D(): Invalid input "
+                                     "poly-polygon, cannot retrieve vertex data" );
+
+                    return ::basegfx::unotools::polyPolygonFromPoint2DSequenceSequence(
+                        xLinePoly->getPoints( 0,
+                                              nPolys,
+                                              0,
+                                              -1 ) );
+                }
+            }
+        }
+
+        void setupGraphics( Gdiplus::Graphics& rGraphics )
+        {
+            // setup graphics with (somewhat arbitrary) defaults
+            //rGraphics.SetCompositingQuality( Gdiplus::CompositingQualityHighQuality );
+            rGraphics.SetCompositingQuality( Gdiplus::CompositingQualityHighSpeed );
+            //rGraphics.SetInterpolationMode( Gdiplus::InterpolationModeHighQualityBilinear ); // with prefiltering for shrinks
+            rGraphics.SetInterpolationMode( Gdiplus::InterpolationModeBilinear );
+
+            // #122683# Switched precedence of pixel offset
+            // mode. Seemingly, polygon stroking needs
+            // PixelOffsetModeNone to achieve visually pleasing
+            // results, whereas all other operations (e.g. polygon
+            // fills, bitmaps) look better with PixelOffsetModeHalf.
+            rGraphics.SetPixelOffsetMode( Gdiplus::PixelOffsetModeHalf ); // Pixel center at (0.5, 0.5) etc.
+            //rGraphics.SetPixelOffsetMode( Gdiplus::PixelOffsetModeNone );
+
+            //rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeHighSpeed ); // no line/curve antialiasing
+            //rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeHighQuality );
+            rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeAntiAlias );
+            //rGraphics.SetTextRenderingHint( Gdiplus::TextRenderingHintAntiAlias );
+            rGraphics.SetTextRenderingHint( Gdiplus::TextRenderingHintSystemDefault );
+            rGraphics.SetPageUnit(Gdiplus::UnitPixel);
+        }
+
+        Gdiplus::Graphics* createGraphicsFromHDC(HDC aHDC)
+        {
+            Gdiplus::Graphics* pRet = new Gdiplus::Graphics(aHDC);
+            setupGraphics( *pRet );
+            return pRet;
+        }
+
+        GraphicsSharedPtr createGraphicsFromBitmap(const BitmapSharedPtr& rBitmap)
+        {
+            GraphicsSharedPtr pRet(Gdiplus::Graphics::FromImage(rBitmap.get()));
+            if( pRet )
+                setupGraphics( *pRet );
+            return pRet;
+        }
+
+        void gdiPlusMatrixFromB2DHomMatrix( Gdiplus::Matrix& rGdiplusMatrix, const ::basegfx::B2DHomMatrix& rMatrix )
+        {
+            rGdiplusMatrix.SetElements( static_cast<Gdiplus::REAL>(rMatrix.get(0,0)),
+                                        static_cast<Gdiplus::REAL>(rMatrix.get(1,0)),
+                                        static_cast<Gdiplus::REAL>(rMatrix.get(0,1)),
+                                        static_cast<Gdiplus::REAL>(rMatrix.get(1,1)),
+                                        static_cast<Gdiplus::REAL>(rMatrix.get(0,2)),
+                                        static_cast<Gdiplus::REAL>(rMatrix.get(1,2)) );
+        }
+
+        void gdiPlusMatrixFromAffineMatrix2D( Gdiplus::Matrix&                  rGdiplusMatrix,
+                                              const geometry::AffineMatrix2D&   rMatrix )
+        {
+            rGdiplusMatrix.SetElements( static_cast<Gdiplus::REAL>(rMatrix.m00),
+                                        static_cast<Gdiplus::REAL>(rMatrix.m10),
+                                        static_cast<Gdiplus::REAL>(rMatrix.m01),
+                                        static_cast<Gdiplus::REAL>(rMatrix.m11),
+                                        static_cast<Gdiplus::REAL>(rMatrix.m02),
+                                        static_cast<Gdiplus::REAL>(rMatrix.m12) );
+        }
+
+        namespace
+        {
+            // TODO(P2): Check whether this gets inlined. If not, make functor
+            // out of it
+            Gdiplus::PointF implGdiPlusPointFromRealPoint2D( const css::geometry::RealPoint2D& rPoint )
+            {
+                return Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.X),
+                                        static_cast<Gdiplus::REAL>(rPoint.Y) );
+            }
+
+            void graphicsPathFromB2DPolygon( GraphicsPathSharedPtr const & rOutput,
+                                             std::vector< Gdiplus::PointF >&  rPoints,
+                                             const ::basegfx::B2DPolygon&       rPoly,
+                                             bool bNoLineJoin)
+            {
+                const sal_uInt32 nPoints( rPoly.count() );
+
+                if( nPoints < 2 )
+                    return;
+
+                rOutput->StartFigure();
+
+                const bool bClosedPolygon( rPoly.isClosed() );
+
+                if( rPoly.areControlPointsUsed() )
+                {
+                    // control points used -> for now, add all
+                    // segments as curves to GraphicsPath
+
+                    // If the polygon is closed, we need to add the
+                    // first point, thus, one more (can't simply
+                    // GraphicsPath::CloseFigure() it, since the last
+                    // point cannot have any control points for GDI+)
+                    rPoints.resize( 3*nPoints + (bClosedPolygon ? 1 : 0) );
+
+                    sal_uInt32 nCurrOutput=0;
+                    for( sal_uInt32 nCurrPoint=0; nCurrPoint<nPoints; ++nCurrPoint )
+                    {
+                        const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint( nCurrPoint ) );
+                        rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
+                                                                  static_cast<Gdiplus::REAL>(rPoint.getY()) );
+
+                        const ::basegfx::B2DPoint& rControlPointA( rPoly.getNextControlPoint( nCurrPoint ) );
+                        rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rControlPointA.getX()),
+                                                                  static_cast<Gdiplus::REAL>(rControlPointA.getY()) );
+
+                        const ::basegfx::B2DPoint& rControlPointB( rPoly.getPrevControlPoint( (nCurrPoint + 1) % nPoints) );
+                        rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rControlPointB.getX()),
+                                                                  static_cast<Gdiplus::REAL>(rControlPointB.getY()) );
+                    }
+
+                    if( bClosedPolygon )
+                    {
+                        // add first point again (to be able to pass
+                        // control points for the last point, see
+                        // above)
+                        const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint(0) );
+                        rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
+                                                                  static_cast<Gdiplus::REAL>(rPoint.getY()) );
+
+                        if(bNoLineJoin && nCurrOutput > 7)
+                        {
+                            for(sal_uInt32 a(3); a < nCurrOutput; a+=3)
+                            {
+                                rOutput->StartFigure();
+                                rOutput->AddBezier(rPoints[a - 3], rPoints[a - 2], rPoints[a - 1], rPoints[a]);
+                            }
+                        }
+                        else
+                        {
+                            rOutput->AddBeziers( rPoints.data(), nCurrOutput );
+                        }
+                    }
+                    else
+                    {
+                        // GraphicsPath expects 3(n-1)+1 points (i.e. the
+                        // last point must not have any trailing control
+                        // points after it).
+                        // Therefore, simply don't pass the last two
+                        // points here.
+                        if( nCurrOutput > 3 )
+                        {
+                            if(bNoLineJoin && nCurrOutput > 7)
+                            {
+                                for(sal_uInt32 a(3); a < nCurrOutput; a+=3)
+                                {
+                                    rOutput->StartFigure();
+                                    rOutput->AddBezier(rPoints[a - 3], rPoints[a - 2], rPoints[a - 1], rPoints[a]);
+                                }
+                            }
+                            else
+                            {
+                                rOutput->AddBeziers( rPoints.data(), nCurrOutput-2 );
+                            }
+                        }
+                    }
+                }
+                else
+                {
+                    // no control points -> no curves, simply add
+                    // straight lines to GraphicsPath
+                    rPoints.resize( nPoints );
+
+                    for( sal_uInt32 nCurrPoint=0; nCurrPoint<nPoints; ++nCurrPoint )
+                    {
+                        const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint( nCurrPoint ) );
+                        rPoints[nCurrPoint] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
+                                                               static_cast<Gdiplus::REAL>(rPoint.getY()) );
+                    }
+
+                    if(bNoLineJoin && nPoints > 2)
+                    {
+                        for(sal_uInt32 a(1); a < nPoints; a++)
+                        {
+                            rOutput->StartFigure();
+                            rOutput->AddLine(rPoints[a - 1], rPoints[a]);
+                        }
+
+                        if(bClosedPolygon)
+                        {
+                            rOutput->StartFigure();
+                            rOutput->AddLine(rPoints[nPoints - 1], rPoints[0]);
+                        }
+                    }
+                    else
+                    {
+                        rOutput->AddLines( rPoints.data(), nPoints );
+                    }
+                }
+
+                if( bClosedPolygon && !bNoLineJoin )
+                    rOutput->CloseFigure();
+            }
+        }
+
+        Gdiplus::Rect gdiPlusRectFromIntegerRectangle2D( const geometry::IntegerRectangle2D& rRect )
+        {
+            return Gdiplus::Rect( rRect.X1,
+                                  rRect.Y1,
+                                  rRect.X2 - rRect.X1,
+                                  rRect.Y2 - rRect.Y1 );
+        }
+
+        Gdiplus::RectF gdiPlusRectFFromRectangle2D( const geometry::RealRectangle2D& rRect )
+        {
+            return Gdiplus::RectF( static_cast<Gdiplus::REAL>(rRect.X1),
+                                   static_cast<Gdiplus::REAL>(rRect.Y1),
+                                   static_cast<Gdiplus::REAL>(rRect.X2 - rRect.X1),
+                                   static_cast<Gdiplus::REAL>(rRect.Y2 - rRect.Y1) );
+        }
+
+        RECT gdiRectFromB2IRect( const ::basegfx::B2IRange& rRect )
+        {
+            RECT aRect = {rRect.getMinX(),
+                          rRect.getMinY(),
+                          rRect.getMaxX(),
+                          rRect.getMaxY()};
+
+            return aRect;
+        }
+
+        geometry::RealPoint2D realPoint2DFromGdiPlusPointF( const Gdiplus::PointF& rPoint )
+        {
+            return geometry::RealPoint2D( rPoint.X, rPoint.Y );
+        }
+
+        geometry::RealRectangle2D realRectangle2DFromGdiPlusRectF( const Gdiplus::RectF& rRect )
+        {
+            return geometry::RealRectangle2D( rRect.X, rRect.Y,
+                                              rRect.X + rRect.Width,
+                                              rRect.Y + rRect.Height );
+        }
+
+        ::basegfx::B2DPoint b2dPointFromGdiPlusPointF( const Gdiplus::PointF& rPoint )
+        {
+            return ::basegfx::B2DPoint( rPoint.X, rPoint.Y );
+        }
+
+        ::basegfx::B2DRange b2dRangeFromGdiPlusRectF( const Gdiplus::RectF& rRect )
+        {
+            return ::basegfx::B2DRange( rRect.X, rRect.Y,
+                                        rRect.X + rRect.Width,
+                                        rRect.Y + rRect.Height );
+        }
+
+        uno::Sequence< sal_Int8 > argbToIntSequence( Gdiplus::ARGB rColor )
+        {
+            // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
+            return
+            {
+                static_cast<sal_Int8>((rColor >> 16) & 0xFF), // red
+                static_cast<sal_Int8>((rColor >> 8) & 0xFF),  // green
+                static_cast<sal_Int8>(rColor & 0xFF),         // blue
+                static_cast<sal_Int8>((rColor >> 24) & 0xFF)  // alpha
+            };
+        }
+
+        Gdiplus::ARGB sequenceToArgb( const uno::Sequence< sal_Int8 >& rColor )
+        {
+            ENSURE_OR_THROW( rColor.getLength() > 2,
+                              "sequenceToArgb: need at least three channels" );
+
+            // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
+            Gdiplus::ARGB aColor;
+
+            aColor = (static_cast<sal_uInt8>(rColor[0]) << 16) | (static_cast<sal_uInt8>(rColor[1]) << 8) | static_cast<sal_uInt8>(rColor[2]);
+
+            if( rColor.getLength() > 3 )
+                aColor |= static_cast<sal_uInt8>(rColor[3]) << 24;
+
+            return aColor;
+        }
+
+        Gdiplus::ARGB sequenceToArgb( const uno::Sequence< double >& rColor )
+        {
+            ENSURE_OR_THROW( rColor.getLength() > 2,
+                              "sequenceToColor: need at least three channels" );
+
+            // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
+            Gdiplus::ARGB aColor;
+
+            ::canvas::tools::verifyRange(rColor[0],0.0,1.0);
+            ::canvas::tools::verifyRange(rColor[1],0.0,1.0);
+            ::canvas::tools::verifyRange(rColor[2],0.0,1.0);
+
+            aColor =
+                (static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[0] ) ) << 16) |
+                (static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[1] ) ) << 8) |
+                static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[2] ) );
+
+            if( rColor.getLength() > 3 )
+            {
+                ::canvas::tools::verifyRange(rColor[3],0.0,1.0);
+                aColor |= static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[3] ) ) << 24;
+            }
+
+            return aColor;
+        }
+
+        GraphicsPathSharedPtr graphicsPathFromRealPoint2DSequence( const uno::Sequence< uno::Sequence< geometry::RealPoint2D > >& points )
+        {
+            GraphicsPathSharedPtr pRes = std::make_shared<Gdiplus::GraphicsPath>();
+            std::vector< Gdiplus::PointF > aPoints;
+
+            for( uno::Sequence< geometry::RealPoint2D > const & seqPoints : points )
+            {
+                const sal_Int32 nCurrSize( seqPoints.getLength() );
+                if( nCurrSize )
+                {
+                    aPoints.resize( nCurrSize );
+
+                    // TODO(F1): Closed/open polygons
+
+                    // convert from RealPoint2D array to Gdiplus::PointF array
+                    std::transform( seqPoints.getConstArray(),
+                                      seqPoints.getConstArray()+nCurrSize,
+                                      aPoints.begin(),
+                                      implGdiPlusPointFromRealPoint2D );
+
+                    pRes->AddLines( aPoints.data(), nCurrSize );
+                }
+            }
+
+            return pRes;
+        }
+
+        GraphicsPathSharedPtr graphicsPathFromB2DPolygon( const ::basegfx::B2DPolygon& rPoly, bool bNoLineJoin )
+        {
+            GraphicsPathSharedPtr               pRes = std::make_shared<Gdiplus::GraphicsPath>();
+            std::vector< Gdiplus::PointF >    aPoints;
+
+            graphicsPathFromB2DPolygon( pRes, aPoints, rPoly, bNoLineJoin );
+
+            return pRes;
+        }
+
+        GraphicsPathSharedPtr graphicsPathFromB2DPolyPolygon( const ::basegfx::B2DPolyPolygon& rPoly, bool bNoLineJoin )
+        {
+            GraphicsPathSharedPtr               pRes = std::make_shared<Gdiplus::GraphicsPath>();
+            std::vector< Gdiplus::PointF >    aPoints;
+
+            const sal_uInt32 nPolies( rPoly.count() );
+            for( sal_uInt32 nCurrPoly=0; nCurrPoly<nPolies; ++nCurrPoly )
+            {
+                graphicsPathFromB2DPolygon( pRes,
+                                            aPoints,
+                                            rPoly.getB2DPolygon( nCurrPoly ),
+                                            bNoLineJoin);
+            }
+
+            return pRes;
+        }
+
+        GraphicsPathSharedPtr graphicsPathFromXPolyPolygon2D( const uno::Reference< rendering::XPolyPolygon2D >& xPoly, bool bNoLineJoin )
+        {
+            LinePolyPolygon* pPolyImpl = dynamic_cast< LinePolyPolygon* >( xPoly.get() );
+
+            if( pPolyImpl )
+            {
+                return pPolyImpl->getGraphicsPath( bNoLineJoin );
+            }
+            else
+            {
+                return tools::graphicsPathFromB2DPolyPolygon(
+                    polyPolygonFromXPolyPolygon2D( xPoly ), bNoLineJoin );
+            }
+        }
+
+        bool drawGdiPlusBitmap( const GraphicsSharedPtr& rGraphics,
+                                const BitmapSharedPtr&   rBitmap )
+        {
+            Gdiplus::PointF aPoint;
+            return (Gdiplus::Ok == rGraphics->DrawImage( rBitmap.get(),
+                                                         aPoint ) );
+        }
+
+        bool drawDIBits( const std::shared_ptr<Gdiplus::Graphics>& rGraphics,
+                         const BITMAPINFO&        rBI,
+                         const void*              pBits )
+        {
+            BitmapSharedPtr pBitmap(
+                Gdiplus::Bitmap::FromBITMAPINFO( &rBI,
+                                                 const_cast<void*>(pBits) ) );
+
+            return drawGdiPlusBitmap( rGraphics,
+                                      pBitmap );
+        }
+
+        bool drawRGBABits( const std::shared_ptr<Gdiplus::Graphics>& rGraphics,
+                           const RawRGBABitmap&     rRawRGBAData )
+        {
+            BitmapSharedPtr pBitmap = std::make_shared<Gdiplus::Bitmap>( rRawRGBAData.mnWidth,
+                                                          rRawRGBAData.mnHeight,
+                                                          PixelFormat32bppARGB );
+
+            Gdiplus::BitmapData aBmpData;
+            aBmpData.Width       = rRawRGBAData.mnWidth;
+            aBmpData.Height      = rRawRGBAData.mnHeight;
+            aBmpData.Stride      = 4*aBmpData.Width; // bottom-up format
+            aBmpData.PixelFormat = PixelFormat32bppARGB;
+            aBmpData.Scan0       = const_cast<sal_uInt8*>(rRawRGBAData.maBitmapData.data());
+
+            const Gdiplus::Rect aRect( 0,0,aBmpData.Width,aBmpData.Height );
+            if( Gdiplus::Ok != pBitmap->LockBits( &aRect,
+                                                  Gdiplus::ImageLockModeWrite | Gdiplus::ImageLockModeUserInputBuf,
+                                                  PixelFormat32bppARGB,
+                                                  &aBmpData ) )
+            {
+                return false;
+            }
+
+            // commit data to bitmap
+            pBitmap->UnlockBits( &aBmpData );
+
+            return drawGdiPlusBitmap( rGraphics,
+                                      pBitmap );
+        }
+
+        BitmapSharedPtr bitmapFromXBitmap( const uno::Reference< rendering::XBitmap >& xBitmap )
+        {
+            BitmapProvider* pBitmapProvider = dynamic_cast< BitmapProvider* >(xBitmap.get());
+
+            if( pBitmapProvider )
+            {
+                IBitmapSharedPtr pBitmap( pBitmapProvider->getBitmap() );
+                return pBitmap->getBitmap();
+            }
+            else
+            {
+                // not a native CanvasBitmap, extract VCL bitmap and
+                // render into GDI+ bitmap of similar size
+                // =================================================
+
+                const geometry::IntegerSize2D aBmpSize( xBitmap->getSize() );
+                BitmapSharedPtr               pBitmap;
+
+                if( xBitmap->hasAlpha() )
+                {
+                    // TODO(P2): At least for the alpha bitmap case, it
+                    // would be possible to generate the corresponding
+                    // bitmap directly
+                    pBitmap = std::make_shared<Gdiplus::Bitmap>( aBmpSize.Width,
+                                                        aBmpSize.Height,
+                                                        PixelFormat32bppARGB );
+                }
+                else
+                {
+                    // TODO(F2): Might be wise to create bitmap compatible
+                    // to the VCL bitmap. Also, check whether the VCL
+                    // bitmap's system handles can be used to create the
+                    // GDI+ bitmap (currently, it does not seem so).
+                    pBitmap = std::make_shared<Gdiplus::Bitmap>( aBmpSize.Width,
+                                                        aBmpSize.Height,
+                                                        PixelFormat24bppRGB );
+                }
+
+                GraphicsSharedPtr pGraphics(createGraphicsFromBitmap(pBitmap));
+                tools::setupGraphics(*pGraphics);
+                if( !drawVCLBitmapFromXBitmap(
+                        pGraphics,
+                        xBitmap) )
+                {
+                    pBitmap.reset();
+                }
+
+                return pBitmap;
+            }
+        }
+
+        CanvasFont::ImplRef canvasFontFromXFont( const uno::Reference< rendering::XCanvasFont >& xFont )
+        {
+            CanvasFont* pCanvasFont = dynamic_cast< CanvasFont* >(xFont.get());
+
+            ENSURE_ARG_OR_THROW( pCanvasFont,
+                             "canvasFontFromXFont(): Invalid XFont (or incompatible font for this XCanvas)" );
+
+            return CanvasFont::ImplRef( pCanvasFont );
+        }
+
+        void setModulateImageAttributes( Gdiplus::ImageAttributes& o_rAttr,
+                                         double                    nRedModulation,
+                                         double                    nGreenModulation,
+                                         double                    nBlueModulation,
+                                         double                    nAlphaModulation )
+        {
+            // This gets rather verbose, but we have to setup a color
+            // transformation matrix, in order to incorporate the global
+            // alpha value mfAlpha into the bitmap rendering.
+            Gdiplus::ColorMatrix     aColorMatrix;
+
+            aColorMatrix.m[0][0] = static_cast<Gdiplus::REAL>(nRedModulation);
+            aColorMatrix.m[0][1] = 0.0;
+            aColorMatrix.m[0][2] = 0.0;
+            aColorMatrix.m[0][3] = 0.0;
+            aColorMatrix.m[0][4] = 0.0;
+
+            aColorMatrix.m[1][0] = 0.0;
+            aColorMatrix.m[1][1] = static_cast<Gdiplus::REAL>(nGreenModulation);
+            aColorMatrix.m[1][2] = 0.0;
+            aColorMatrix.m[1][3] = 0.0;
+            aColorMatrix.m[1][4] = 0.0;
+
+            aColorMatrix.m[2][0] = 0.0;
+            aColorMatrix.m[2][1] = 0.0;
+            aColorMatrix.m[2][2] = static_cast<Gdiplus::REAL>(nBlueModulation);
+            aColorMatrix.m[2][3] = 0.0;
+            aColorMatrix.m[2][4] = 0.0;
+
+            aColorMatrix.m[3][0] = 0.0;
+            aColorMatrix.m[3][1] = 0.0;
+            aColorMatrix.m[3][2] = 0.0;
+            aColorMatrix.m[3][3] = static_cast<Gdiplus::REAL>(nAlphaModulation);
+            aColorMatrix.m[3][4] = 0.0;
+
+            aColorMatrix.m[4][0] = 0.0;
+            aColorMatrix.m[4][1] = 0.0;
+            aColorMatrix.m[4][2] = 0.0;
+            aColorMatrix.m[4][3] = 0.0;
+            aColorMatrix.m[4][4] = 1.0;
+
+            o_rAttr.SetColorMatrix( &aColorMatrix );
+        }
+
+} // namespace dxcanvas::tools
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */