canvas/source/directx/dx_impltools.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_canvas.hxx"
  33
  34 #include <ctype.h> // don't ask. msdev breaks otherwise...
  35 #include <basegfx/numeric/ftools.hxx>
  36
  37 #include <canvas/debug.hxx>
  38 #include <canvas/verbosetrace.hxx>
  39 #include <tools/diagnose_ex.h>
  40
  41 #include <com/sun/star/lang/XServiceInfo.hpp>
  42 #include <com/sun/star/lang/XUnoTunnel.hpp>
  43 #include <com/sun/star/geometry/RealPoint2D.hpp>
  44 #include <com/sun/star/geometry/IntegerRectangle2D.hpp>
  45
  46 #include <basegfx/matrix/b2dhommatrix.hxx>
  47 #include <basegfx/range/b2irectangle.hxx>
  48 #include <basegfx/range/b2drectangle.hxx>
  49 #include <basegfx/polygon/b2dpolygon.hxx>
  50 #include <basegfx/polygon/b2dpolypolygon.hxx>
  51 #include <basegfx/tools/canvastools.hxx>
  52
  53 #include <canvas/canvastools.hxx>
  54 #include <canvas/verifyinput.hxx>
  55
  56 #include "dx_impltools.hxx"
  57 #include "dx_vcltools.hxx"
  58 #include "dx_linepolypolygon.hxx"
  59 #include "dx_canvasbitmap.hxx"
  60 #include "dx_canvasfont.hxx"
  61 #include "dx_canvas.hxx"
  62 #include "dx_spritecanvas.hxx"
  63
  64 #include <boost/scoped_array.hpp>
  65
  66 #include <vector>
  67 #include <algorithm>
  68
  69
  70 using namespace ::com::sun::star;
  71
  72
  73 namespace dxcanvas
  74 {
  75     namespace tools
  76     {
  77         ::basegfx::B2DPolyPolygon polyPolygonFromXPolyPolygon2D( const uno::Reference< rendering::XPolyPolygon2D >& xPoly )
  78         {
  79             LinePolyPolygon* pPolyImpl = dynamic_cast< LinePolyPolygon* >( xPoly.get() );
  80
  81             if( pPolyImpl )
  82             {
  83                 return pPolyImpl->getPolyPolygon();
  84             }
  85             else
  86             {
  87                 const sal_Int32 nPolys( xPoly->getNumberOfPolygons() );
  88
  89                 // not a known implementation object - try data source
  90                 // interfaces
  91                 uno::Reference< rendering::XBezierPolyPolygon2D > xBezierPoly(
  92                     xPoly,
  93                     uno::UNO_QUERY );
  94
  95                 if( xBezierPoly.is() )
  96                 {
  97                     return ::basegfx::unotools::polyPolygonFromBezier2DSequenceSequence(
  98                         xBezierPoly->getBezierSegments( 0,
  99                                                         nPolys,
 100                                                         0,
 101                                                         -1 ) );
 102                 }
 103                 else
 104                 {
 105                     uno::Reference< rendering::XLinePolyPolygon2D > xLinePoly(
 106                         xPoly,
 107                         uno::UNO_QUERY );
 108
 109                     // no implementation class and no data provider
 110                     // found - contract violation.
 111                     ENSURE_ARG_OR_THROW( xLinePoly.is(),
 112                                      "VCLCanvas::polyPolygonFromXPolyPolygon2D(): Invalid input "
 113                                      "poly-polygon, cannot retrieve vertex data" );
 114
 115                     return ::basegfx::unotools::polyPolygonFromPoint2DSequenceSequence(
 116                         xLinePoly->getPoints( 0,
 117                                               nPolys,
 118                                               0,
 119                                               -1 ) );
 120                 }
 121             }
 122         }
 123
 124         void setupGraphics( Gdiplus::Graphics& rGraphics )
 125         {
 126             // setup graphics with (somewhat arbitrary) defaults
 127             //rGraphics.SetCompositingQuality( Gdiplus::CompositingQualityHighQuality );
 128             rGraphics.SetCompositingQuality( Gdiplus::CompositingQualityHighSpeed );
 129             //rGraphics.SetInterpolationMode( Gdiplus::InterpolationModeHighQualityBilinear ); // with prefiltering for shrinks
 130             rGraphics.SetInterpolationMode( Gdiplus::InterpolationModeBilinear );
 131
 132             // #122683# Switched precedence of pixel offset
 133             // mode. Seemingly, polygon stroking needs
 134             // PixelOffsetModeNone to achieve visually pleasing
 135             // results, whereas all other operations (e.g. polygon
 136             // fills, bitmaps) look better with PixelOffsetModeHalf.
 137             rGraphics.SetPixelOffsetMode( Gdiplus::PixelOffsetModeHalf ); // Pixel center at (0.5, 0.5) etc.
 138             //rGraphics.SetPixelOffsetMode( Gdiplus::PixelOffsetModeNone );
 139
 140             //rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeHighSpeed ); // no line/curve antialiasing
 141             //rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeHighQuality );
 142             rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeAntiAlias );
 143             //rGraphics.SetTextRenderingHint( Gdiplus::TextRenderingHintAntiAlias );
 144             rGraphics.SetTextRenderingHint( Gdiplus::TextRenderingHintSystemDefault );
 145             rGraphics.SetPageUnit(Gdiplus::UnitPixel);
 146         }
 147
 148         Gdiplus::Graphics* createGraphicsFromHDC(HDC aHDC)
 149         {
 150             Gdiplus::Graphics* pRet = new Gdiplus::Graphics(aHDC);
 151             if( pRet )
 152                 setupGraphics( *pRet );
 153             return pRet;
 154         }
 155
 156         Gdiplus::Graphics* createGraphicsFromBitmap(const BitmapSharedPtr& rBitmap)
 157         {
 158             Gdiplus::Graphics* pRet = Gdiplus::Graphics::FromImage(rBitmap.get());
 159             if( pRet )
 160                 setupGraphics( *pRet );
 161             return pRet;
 162         }
 163
 164         void gdiPlusMatrixFromB2DHomMatrix( Gdiplus::Matrix& rGdiplusMatrix, const ::basegfx::B2DHomMatrix& rMatrix )
 165         {
 166             rGdiplusMatrix.SetElements( static_cast<Gdiplus::REAL>(rMatrix.get(0,0)),
 167                                         static_cast<Gdiplus::REAL>(rMatrix.get(1,0)),
 168                                         static_cast<Gdiplus::REAL>(rMatrix.get(0,1)),
 169                                         static_cast<Gdiplus::REAL>(rMatrix.get(1,1)),
 170                                         static_cast<Gdiplus::REAL>(rMatrix.get(0,2)),
 171                                         static_cast<Gdiplus::REAL>(rMatrix.get(1,2)) );
 172         }
 173
 174         void gdiPlusMatrixFromAffineMatrix2D( Gdiplus::Matrix&                                  rGdiplusMatrix,
 175                                               const geometry::AffineMatrix2D&   rMatrix )
 176         {
 177             rGdiplusMatrix.SetElements( static_cast<Gdiplus::REAL>(rMatrix.m00),
 178                                         static_cast<Gdiplus::REAL>(rMatrix.m10),
 179                                         static_cast<Gdiplus::REAL>(rMatrix.m01),
 180                                         static_cast<Gdiplus::REAL>(rMatrix.m11),
 181                                         static_cast<Gdiplus::REAL>(rMatrix.m02),
 182                                         static_cast<Gdiplus::REAL>(rMatrix.m12) );
 183         }
 184
 185         namespace
 186         {
 187             // TODO(P2): Check whether this gets inlined. If not, make functor
 188             // out of it
 189             inline Gdiplus::PointF implGdiPlusPointFromRealPoint2D( const ::com::sun::star::geometry::RealPoint2D& rPoint )
 190             {
 191                 return Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.X),
 192                                         static_cast<Gdiplus::REAL>(rPoint.Y) );
 193             }
 194
 195             void graphicsPathFromB2DPolygon( GraphicsPathSharedPtr&             rOutput,
 196                                              ::std::vector< Gdiplus::PointF >&  rPoints,
 197                                              const ::basegfx::B2DPolygon&       rPoly )
 198             {
 199                 const sal_uInt32 nPoints( rPoly.count() );
 200
 201                 if( !nPoints )
 202                     return;
 203
 204                 rOutput->StartFigure();
 205
 206                 const bool bClosedPolygon( rPoly.isClosed() );
 207
 208                 if( rPoly.areControlPointsUsed() )
 209                 {
 210                     // control points used -> for now, add all
 211                     // segments as curves to GraphicsPath
 212
 213                     // If the polygon is closed, we need to add the
 214                     // first point, thus, one more (can't simply
 215                     // GraphicsPath::CloseFigure() it, since the last
 216                     // point cannot have any control points for GDI+)
 217                     rPoints.resize( 3*nPoints + bClosedPolygon );
 218
 219                     sal_uInt32 nCurrOutput=0;
 220                     for( sal_uInt32 nCurrPoint=0; nCurrPoint<nPoints; ++nCurrPoint )
 221                     {
 222                         const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint( nCurrPoint ) );
 223                         rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
 224                                                                   static_cast<Gdiplus::REAL>(rPoint.getY()) );
 225
 226                         const ::basegfx::B2DPoint& rControlPointA( rPoly.getNextControlPoint( nCurrPoint ) );
 227                         rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rControlPointA.getX()),
 228                                                                   static_cast<Gdiplus::REAL>(rControlPointA.getY()) );
 229
 230                         const ::basegfx::B2DPoint& rControlPointB( rPoly.getPrevControlPoint( (nCurrPoint + 1) % nPoints) );
 231                         rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rControlPointB.getX()),
 232                                                                   static_cast<Gdiplus::REAL>(rControlPointB.getY()) );
 233                     }
 234
 235                     if( bClosedPolygon )
 236                     {
 237                         // add first point again (to be able to pass
 238                         // control points for the last point, see
 239                         // above)
 240                         const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint(0) );
 241                         rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
 242                                                                   static_cast<Gdiplus::REAL>(rPoint.getY()) );
 243
 244                         rOutput->AddBeziers( &rPoints[0], nCurrOutput );
 245                     }
 246                     else
 247                     {
 248                         // GraphicsPath expects 3(n-1)+1 points (i.e. the
 249                         // last point must not have any trailing control
 250                         // points after it).
 251                         // Therefore, simply don't pass the last two
 252                         // points here.
 253                         if( nCurrOutput > 3 )
 254                             rOutput->AddBeziers( &rPoints[0], nCurrOutput-2 );
 255                     }
 256                 }
 257                 else
 258                 {
 259                     // no control points -> no curves, simply add
 260                     // straigt lines to GraphicsPath
 261                     rPoints.resize( nPoints );
 262
 263                     for( sal_uInt32 nCurrPoint=0; nCurrPoint<nPoints; ++nCurrPoint )
 264                     {
 265                         const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint( nCurrPoint ) );
 266                         rPoints[nCurrPoint] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
 267                                                                static_cast<Gdiplus::REAL>(rPoint.getY()) );
 268                     }
 269
 270                     rOutput->AddLines( &rPoints[0], nPoints );
 271                 }
 272
 273                 if( bClosedPolygon )
 274                     rOutput->CloseFigure();
 275             }
 276         }
 277
 278         Gdiplus::PointF gdiPlusPointFromRealPoint2D( const ::com::sun::star::geometry::RealPoint2D& rPoint )
 279         {
 280             return implGdiPlusPointFromRealPoint2D( rPoint );
 281         }
 282
 283         Gdiplus::Rect gdiPlusRectFromIntegerRectangle2D( const geometry::IntegerRectangle2D& rRect )
 284         {
 285             return Gdiplus::Rect( rRect.X1,
 286                                   rRect.Y1,
 287                                   rRect.X2 - rRect.X1,
 288                                   rRect.Y2 - rRect.Y1 );
 289         }
 290
 291         Gdiplus::RectF gdiPlusRectFFromRectangle2D( const geometry::RealRectangle2D& rRect )
 292         {
 293             return Gdiplus::RectF( static_cast<Gdiplus::REAL>(rRect.X1),
 294                                    static_cast<Gdiplus::REAL>(rRect.Y1),
 295                                    static_cast<Gdiplus::REAL>(rRect.X2 - rRect.X1),
 296                                    static_cast<Gdiplus::REAL>(rRect.Y2 - rRect.Y1) );
 297         }
 298
 299         RECT gdiRectFromB2IRect( const ::basegfx::B2IRange& rRect )
 300         {
 301             RECT aRect = {rRect.getMinX(),
 302                           rRect.getMinY(),
 303                           rRect.getMaxX(),
 304                           rRect.getMaxY()};
 305
 306             return aRect;
 307         }
 308
 309         geometry::RealPoint2D realPoint2DFromGdiPlusPointF( const Gdiplus::PointF& rPoint )
 310         {
 311             return geometry::RealPoint2D( rPoint.X, rPoint.Y );
 312         }
 313
 314         geometry::RealRectangle2D realRectangle2DFromGdiPlusRectF( const Gdiplus::RectF& rRect )
 315         {
 316             return geometry::RealRectangle2D( rRect.X, rRect.Y,
 317                                               rRect.X + rRect.Width,
 318                                               rRect.Y + rRect.Height );
 319         }
 320
 321         ::basegfx::B2DPoint     b2dPointFromGdiPlusPointF( const Gdiplus::PointF& rPoint )
 322         {
 323             return ::basegfx::B2DPoint( rPoint.X, rPoint.Y );
 324         }
 325
 326         ::basegfx::B2DRange     b2dRangeFromGdiPlusRectF( const Gdiplus::RectF& rRect )
 327         {
 328             return ::basegfx::B2DRange( rRect.X, rRect.Y,
 329                                         rRect.X + rRect.Width,
 330                                         rRect.Y + rRect.Height );
 331         }
 332
 333         uno::Sequence< double > argbToDoubleSequence( const Gdiplus::ARGB& rColor )
 334         {
 335             // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
 336             uno::Sequence< double > aRet(4);
 337
 338             aRet[0] = ((rColor >> 16) & 0xFF) / 255.0;  // red
 339             aRet[1] = ((rColor >> 8) & 0xFF) / 255.0;   // green
 340             aRet[2] = (rColor & 0xFF) / 255.0;                  // blue
 341             aRet[3] = ((rColor >> 24) & 0xFF) / 255.0;  // alpha
 342
 343             return aRet;
 344         }
 345
 346         uno::Sequence< sal_Int8 > argbToIntSequence( const Gdiplus::ARGB& rColor )
 347         {
 348             // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
 349             uno::Sequence< sal_Int8 > aRet(4);
 350
 351             aRet[0] = static_cast<sal_Int8>((rColor >> 16) & 0xFF);     // red
 352             aRet[1] = static_cast<sal_Int8>((rColor >> 8) & 0xFF);      // green
 353             aRet[2] = static_cast<sal_Int8>(rColor & 0xFF);                     // blue
 354             aRet[3] = static_cast<sal_Int8>((rColor >> 24) & 0xFF);     // alpha
 355
 356             return aRet;
 357         }
 358
 359         Gdiplus::ARGB sequenceToArgb( const uno::Sequence< sal_Int8 >& rColor )
 360         {
 361             ENSURE_OR_THROW( rColor.getLength() > 2,
 362                               "sequenceToArgb: need at least three channels" );
 363
 364             // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
 365             Gdiplus::ARGB aColor;
 366
 367             aColor = (static_cast<sal_uInt8>(rColor[0]) << 16) | (static_cast<sal_uInt8>(rColor[1]) << 8) | static_cast<sal_uInt8>(rColor[2]);
 368
 369             if( rColor.getLength() > 3 )
 370                 aColor |= static_cast<sal_uInt8>(rColor[3]) << 24;
 371
 372             return aColor;
 373         }
 374
 375         Gdiplus::ARGB sequenceToArgb( const uno::Sequence< double >& rColor )
 376         {
 377             ENSURE_OR_THROW( rColor.getLength() > 2,
 378                               "sequenceToColor: need at least three channels" );
 379
 380             // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
 381             Gdiplus::ARGB aColor;
 382
 383             ::canvas::tools::verifyRange(rColor[0],0.0,1.0);
 384             ::canvas::tools::verifyRange(rColor[1],0.0,1.0);
 385             ::canvas::tools::verifyRange(rColor[2],0.0,1.0);
 386
 387             aColor =
 388                 (static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[0] ) ) << 16) |
 389                 (static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[1] ) ) << 8) |
 390                 static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[2] ) );
 391
 392             if( rColor.getLength() > 3 )
 393             {
 394                 ::canvas::tools::verifyRange(rColor[3],0.0,1.0);
 395                 aColor |= static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[3] ) ) << 24;
 396             }
 397
 398             return aColor;
 399         }
 400
 401         GraphicsPathSharedPtr graphicsPathFromRealPoint2DSequence( const uno::Sequence< uno::Sequence< geometry::RealPoint2D > >& points )
 402         {
 403             GraphicsPathSharedPtr pRes( new Gdiplus::GraphicsPath() );
 404             ::std::vector< Gdiplus::PointF > aPoints;
 405
 406             sal_Int32 nCurrPoly;
 407             for( nCurrPoly=0; nCurrPoly<points.getLength(); ++nCurrPoly )
 408             {
 409                 const sal_Int32 nCurrSize( points[nCurrPoly].getLength() );
 410                 if( nCurrSize )
 411                 {
 412                     aPoints.resize( nCurrSize );
 413
 414                     // TODO(F1): Closed/open polygons
 415
 416                     // convert from RealPoint2D array to Gdiplus::PointF array
 417                     ::std::transform( const_cast< uno::Sequence< geometry::RealPoint2D >& >(points[nCurrPoly]).getArray(),
 418                                       const_cast< uno::Sequence< geometry::RealPoint2D >& >(points[nCurrPoly]).getArray()+nCurrSize,
 419                                       aPoints.begin(),
 420                                       implGdiPlusPointFromRealPoint2D );
 421
 422                     pRes->AddLines( &aPoints[0], nCurrSize );
 423                 }
 424             }
 425
 426             return pRes;
 427         }
 428
 429         GraphicsPathSharedPtr graphicsPathFromB2DPolygon( const ::basegfx::B2DPolygon& rPoly )
 430         {
 431             GraphicsPathSharedPtr                               pRes( new Gdiplus::GraphicsPath() );
 432             ::std::vector< Gdiplus::PointF >    aPoints;
 433
 434             graphicsPathFromB2DPolygon( pRes, aPoints, rPoly );
 435
 436             return pRes;
 437         }
 438
 439         GraphicsPathSharedPtr graphicsPathFromB2DPolyPolygon( const ::basegfx::B2DPolyPolygon& rPoly )
 440         {
 441             GraphicsPathSharedPtr                               pRes( new Gdiplus::GraphicsPath() );
 442             ::std::vector< Gdiplus::PointF >    aPoints;
 443
 444             const sal_uInt32 nPolies( rPoly.count() );
 445             for( sal_uInt32 nCurrPoly=0; nCurrPoly<nPolies; ++nCurrPoly )
 446             {
 447                 graphicsPathFromB2DPolygon( pRes,
 448                                             aPoints,
 449                                             rPoly.getB2DPolygon( nCurrPoly ) );
 450             }
 451
 452             return pRes;
 453         }
 454
 455         GraphicsPathSharedPtr graphicsPathFromXPolyPolygon2D( const uno::Reference< rendering::XPolyPolygon2D >& xPoly )
 456         {
 457             LinePolyPolygon* pPolyImpl = dynamic_cast< LinePolyPolygon* >( xPoly.get() );
 458
 459             if( pPolyImpl )
 460             {
 461                 return pPolyImpl->getGraphicsPath();
 462             }
 463             else
 464             {
 465                 return tools::graphicsPathFromB2DPolyPolygon(
 466                     polyPolygonFromXPolyPolygon2D( xPoly ) );
 467             }
 468         }
 469
 470         bool drawGdiPlusBitmap( const GraphicsSharedPtr& rGraphics,
 471                                 const BitmapSharedPtr&   rBitmap )
 472         {
 473             Gdiplus::PointF     aPoint;
 474             return (Gdiplus::Ok == rGraphics->DrawImage( rBitmap.get(),
 475                                                          aPoint ) );
 476         }
 477
 478         bool drawDIBits( const GraphicsSharedPtr& rGraphics,
 479                          const BITMAPINFO&                rBI,
 480                          const void*                      pBits )
 481         {
 482             BitmapSharedPtr pBitmap(
 483                 Gdiplus::Bitmap::FromBITMAPINFO( &rBI,
 484                                                  (void*)pBits ) );
 485
 486             return drawGdiPlusBitmap( rGraphics,
 487                                       pBitmap );
 488         }
 489
 490         bool drawRGBABits( const GraphicsSharedPtr& rGraphics,
 491                            const RawRGBABitmap&         rRawRGBAData )
 492         {
 493             BitmapSharedPtr pBitmap( new Gdiplus::Bitmap( rRawRGBAData.mnWidth,
 494                                                           rRawRGBAData.mnHeight,
 495                                                           PixelFormat32bppARGB ) );
 496
 497             Gdiplus::BitmapData aBmpData;
 498             aBmpData.Width               = rRawRGBAData.mnWidth;
 499             aBmpData.Height              = rRawRGBAData.mnHeight;
 500             aBmpData.Stride      = 4*aBmpData.Width; // bottom-up format
 501             aBmpData.PixelFormat = PixelFormat32bppARGB;
 502             aBmpData.Scan0               = rRawRGBAData.mpBitmapData.get();
 503
 504             const Gdiplus::Rect aRect( 0,0,aBmpData.Width,aBmpData.Height );
 505             if( Gdiplus::Ok != pBitmap->LockBits( &aRect,
 506                                                   Gdiplus::ImageLockModeWrite | Gdiplus::ImageLockModeUserInputBuf,
 507                                                   PixelFormat32bppARGB,
 508                                                   &aBmpData ) )
 509             {
 510                 return false;
 511             }
 512
 513             // commit data to bitmap
 514             pBitmap->UnlockBits( &aBmpData );
 515
 516             return drawGdiPlusBitmap( rGraphics,
 517                                       pBitmap );
 518         }
 519
 520         BitmapSharedPtr bitmapFromXBitmap( const uno::Reference< rendering::XBitmap >& xBitmap )
 521         {
 522             BitmapProvider* pBitmapProvider = dynamic_cast< BitmapProvider* >(xBitmap.get());
 523
 524             if( pBitmapProvider )
 525             {
 526                 IBitmapSharedPtr pBitmap( pBitmapProvider->getBitmap() );
 527                 return pBitmap->getBitmap();
 528             }
 529             else
 530             {
 531                 // not a native CanvasBitmap, extract VCL bitmap and
 532                 // render into GDI+ bitmap of similar size
 533                 // =================================================
 534
 535                 const geometry::IntegerSize2D aBmpSize( xBitmap->getSize() );
 536                 BitmapSharedPtr                           pBitmap;
 537
 538                 if( xBitmap->hasAlpha() )
 539                 {
 540                     // TODO(P2): At least for the alpha bitmap case, it
 541                     // would be possible to generate the corresponding
 542                     // bitmap directly
 543                     pBitmap.reset( new Gdiplus::Bitmap( aBmpSize.Width,
 544                                                         aBmpSize.Height,
 545                                                         PixelFormat32bppARGB ) );
 546                 }
 547                 else
 548                 {
 549                     // TODO(F2): Might be wise to create bitmap compatible
 550                     // to the VCL bitmap. Also, check whether the VCL
 551                     // bitmap's system handles can be used to create the
 552                     // GDI+ bitmap (currently, it does not seem so).
 553                     pBitmap.reset( new Gdiplus::Bitmap( aBmpSize.Width,
 554                                                         aBmpSize.Height,
 555                                                         PixelFormat24bppRGB ) );
 556                 }
 557
 558                 GraphicsSharedPtr pGraphics(createGraphicsFromBitmap(pBitmap));
 559                 tools::setupGraphics(*pGraphics);
 560                 if( !drawVCLBitmapFromXBitmap(
 561                         pGraphics,
 562                         xBitmap) )
 563                 {
 564                     pBitmap.reset();
 565                 }
 566
 567                 return pBitmap;
 568             }
 569         }
 570
 571         CanvasFont::ImplRef     canvasFontFromXFont( const uno::Reference< rendering::XCanvasFont >& xFont )
 572         {
 573             CanvasFont* pCanvasFont = dynamic_cast< CanvasFont* >(xFont.get());
 574
 575             ENSURE_ARG_OR_THROW( pCanvasFont,
 576                              "canvasFontFromXFont(): Invalid XFont (or incompatible font for this XCanvas)" );
 577
 578             return CanvasFont::ImplRef( pCanvasFont );
 579         }
 580
 581         void setModulateImageAttributes( Gdiplus::ImageAttributes& o_rAttr,
 582                                          double                                    nRedModulation,
 583                                          double                                    nGreenModulation,
 584                                          double                                    nBlueModulation,
 585                                          double                                    nAlphaModulation )
 586         {
 587             // This gets rather verbose, but we have to setup a color
 588             // transformation matrix, in order to incorporate the global
 589             // alpha value mfAlpha into the bitmap rendering.
 590             Gdiplus::ColorMatrix         aColorMatrix;
 591
 592             aColorMatrix.m[0][0] = static_cast<Gdiplus::REAL>(nRedModulation);
 593             aColorMatrix.m[0][1] = 0.0;
 594             aColorMatrix.m[0][2] = 0.0;
 595             aColorMatrix.m[0][3] = 0.0;
 596             aColorMatrix.m[0][4] = 0.0;
 597
 598             aColorMatrix.m[1][0] = 0.0;
 599             aColorMatrix.m[1][1] = static_cast<Gdiplus::REAL>(nGreenModulation);
 600             aColorMatrix.m[1][2] = 0.0;
 601             aColorMatrix.m[1][3] = 0.0;
 602             aColorMatrix.m[1][4] = 0.0;
 603
 604             aColorMatrix.m[2][0] = 0.0;
 605             aColorMatrix.m[2][1] = 0.0;
 606             aColorMatrix.m[2][2] = static_cast<Gdiplus::REAL>(nBlueModulation);
 607             aColorMatrix.m[2][3] = 0.0;
 608             aColorMatrix.m[2][4] = 0.0;
 609
 610             aColorMatrix.m[3][0] = 0.0;
 611             aColorMatrix.m[3][1] = 0.0;
 612             aColorMatrix.m[3][2] = 0.0;
 613             aColorMatrix.m[3][3] = static_cast<Gdiplus::REAL>(nAlphaModulation);
 614             aColorMatrix.m[3][4] = 0.0;
 615
 616             aColorMatrix.m[4][0] = 0.0;
 617             aColorMatrix.m[4][1] = 0.0;
 618             aColorMatrix.m[4][2] = 0.0;
 619             aColorMatrix.m[4][3] = 0.0;
 620             aColorMatrix.m[4][4] = 1.0;
 621
 622             o_rAttr.SetColorMatrix( &aColorMatrix,
 623                                     Gdiplus::ColorMatrixFlagsDefault,
 624                                     Gdiplus::ColorAdjustTypeDefault );
 625         }
 626
 627     } // namespace tools
 628 } // namespace dxcanvas