canvas/source/directx/dx_impltools.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2000, 2010 Oracle and/or its affiliates.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * This file is part of OpenOffice.org.
  10  *
  11  * OpenOffice.org is free software: you can redistribute it and/or modify
  12  * it under the terms of the GNU Lesser General Public License version 3
  13  * only, as published by the Free Software Foundation.
  14  *
  15  * OpenOffice.org is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU Lesser General Public License version 3 for more details
  19  * (a copy is included in the LICENSE file that accompanied this code).
  20  *
  21  * You should have received a copy of the GNU Lesser General Public License
  22  * version 3 along with OpenOffice.org.  If not, see
  23  * <http://www.openoffice.org/license.html>
  24  * for a copy of the LGPLv3 License.
  25  *
  26  ************************************************************************/
  27
  28 // MARKER(update_precomp.py): autogen include statement, do not remove
  29 #include "precompiled_canvas.hxx"
  30
  31 #include <ctype.h> // don't ask. msdev breaks otherwise...
  32 #include <basegfx/numeric/ftools.hxx>
  33
  34 #include <canvas/debug.hxx>
  35 #include <canvas/verbosetrace.hxx>
  36 #include <tools/diagnose_ex.h>
  37
  38 #include <com/sun/star/lang/XServiceInfo.hpp>
  39 #include <com/sun/star/lang/XUnoTunnel.hpp>
  40 #include <com/sun/star/geometry/RealPoint2D.hpp>
  41 #include <com/sun/star/geometry/IntegerRectangle2D.hpp>
  42
  43 #include <basegfx/matrix/b2dhommatrix.hxx>
  44 #include <basegfx/range/b2irectangle.hxx>
  45 #include <basegfx/range/b2drectangle.hxx>
  46 #include <basegfx/polygon/b2dpolygon.hxx>
  47 #include <basegfx/polygon/b2dpolypolygon.hxx>
  48 #include <basegfx/tools/canvastools.hxx>
  49
  50 #include <canvas/canvastools.hxx>
  51 #include <canvas/verifyinput.hxx>
  52
  53 #include "dx_impltools.hxx"
  54 #include "dx_vcltools.hxx"
  55 #include "dx_linepolypolygon.hxx"
  56 #include "dx_canvasbitmap.hxx"
  57 #include "dx_canvasfont.hxx"
  58 #include "dx_canvas.hxx"
  59 #include "dx_spritecanvas.hxx"
  60
  61 #include <boost/scoped_array.hpp>
  62
  63 #include <vector>
  64 #include <algorithm>
  65
  66
  67 using namespace ::com::sun::star;
  68
  69
  70 namespace dxcanvas
  71 {
  72     namespace tools
  73     {
  74         ::basegfx::B2DPolyPolygon polyPolygonFromXPolyPolygon2D( const uno::Reference< rendering::XPolyPolygon2D >& xPoly )
  75         {
  76             LinePolyPolygon* pPolyImpl = dynamic_cast< LinePolyPolygon* >( xPoly.get() );
  77
  78             if( pPolyImpl )
  79             {
  80                 return pPolyImpl->getPolyPolygon();
  81             }
  82             else
  83             {
  84                 const sal_Int32 nPolys( xPoly->getNumberOfPolygons() );
  85
  86                 // not a known implementation object - try data source
  87                 // interfaces
  88                 uno::Reference< rendering::XBezierPolyPolygon2D > xBezierPoly(
  89                     xPoly,
  90                     uno::UNO_QUERY );
  91
  92                 if( xBezierPoly.is() )
  93                 {
  94                     return ::basegfx::unotools::polyPolygonFromBezier2DSequenceSequence(
  95                         xBezierPoly->getBezierSegments( 0,
  96                                                         nPolys,
  97                                                         0,
  98                                                         -1 ) );
  99                 }
 100                 else
 101                 {
 102                     uno::Reference< rendering::XLinePolyPolygon2D > xLinePoly(
 103                         xPoly,
 104                         uno::UNO_QUERY );
 105
 106                     // no implementation class and no data provider
 107                     // found - contract violation.
 108                     ENSURE_ARG_OR_THROW( xLinePoly.is(),
 109                                      "VCLCanvas::polyPolygonFromXPolyPolygon2D(): Invalid input "
 110                                      "poly-polygon, cannot retrieve vertex data" );
 111
 112                     return ::basegfx::unotools::polyPolygonFromPoint2DSequenceSequence(
 113                         xLinePoly->getPoints( 0,
 114                                               nPolys,
 115                                               0,
 116                                               -1 ) );
 117                 }
 118             }
 119         }
 120
 121         void setupGraphics( Gdiplus::Graphics& rGraphics )
 122         {
 123             // setup graphics with (somewhat arbitrary) defaults
 124             //rGraphics.SetCompositingQuality( Gdiplus::CompositingQualityHighQuality );
 125             rGraphics.SetCompositingQuality( Gdiplus::CompositingQualityHighSpeed );
 126             //rGraphics.SetInterpolationMode( Gdiplus::InterpolationModeHighQualityBilinear ); // with prefiltering for shrinks
 127             rGraphics.SetInterpolationMode( Gdiplus::InterpolationModeBilinear );
 128
 129             // #122683# Switched precedence of pixel offset
 130             // mode. Seemingly, polygon stroking needs
 131             // PixelOffsetModeNone to achieve visually pleasing
 132             // results, whereas all other operations (e.g. polygon
 133             // fills, bitmaps) look better with PixelOffsetModeHalf.
 134             rGraphics.SetPixelOffsetMode( Gdiplus::PixelOffsetModeHalf ); // Pixel center at (0.5, 0.5) etc.
 135             //rGraphics.SetPixelOffsetMode( Gdiplus::PixelOffsetModeNone );
 136
 137             //rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeHighSpeed ); // no line/curve antialiasing
 138             //rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeHighQuality );
 139             rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeAntiAlias );
 140             //rGraphics.SetTextRenderingHint( Gdiplus::TextRenderingHintAntiAlias );
 141             rGraphics.SetTextRenderingHint( Gdiplus::TextRenderingHintSystemDefault );
 142             rGraphics.SetPageUnit(Gdiplus::UnitPixel);
 143         }
 144
 145         Gdiplus::Graphics* createGraphicsFromHDC(HDC aHDC)
 146         {
 147             Gdiplus::Graphics* pRet = new Gdiplus::Graphics(aHDC);
 148             if( pRet )
 149                 setupGraphics( *pRet );
 150             return pRet;
 151         }
 152
 153         Gdiplus::Graphics* createGraphicsFromBitmap(const BitmapSharedPtr& rBitmap)
 154         {
 155             Gdiplus::Graphics* pRet = Gdiplus::Graphics::FromImage(rBitmap.get());
 156             if( pRet )
 157                 setupGraphics( *pRet );
 158             return pRet;
 159         }
 160
 161         void gdiPlusMatrixFromB2DHomMatrix( Gdiplus::Matrix& rGdiplusMatrix, const ::basegfx::B2DHomMatrix& rMatrix )
 162         {
 163             rGdiplusMatrix.SetElements( static_cast<Gdiplus::REAL>(rMatrix.get(0,0)),
 164                                         static_cast<Gdiplus::REAL>(rMatrix.get(1,0)),
 165                                         static_cast<Gdiplus::REAL>(rMatrix.get(0,1)),
 166                                         static_cast<Gdiplus::REAL>(rMatrix.get(1,1)),
 167                                         static_cast<Gdiplus::REAL>(rMatrix.get(0,2)),
 168                                         static_cast<Gdiplus::REAL>(rMatrix.get(1,2)) );
 169         }
 170
 171         void gdiPlusMatrixFromAffineMatrix2D( Gdiplus::Matrix&                  rGdiplusMatrix,
 172                                               const geometry::AffineMatrix2D&   rMatrix )
 173         {
 174             rGdiplusMatrix.SetElements( static_cast<Gdiplus::REAL>(rMatrix.m00),
 175                                         static_cast<Gdiplus::REAL>(rMatrix.m10),
 176                                         static_cast<Gdiplus::REAL>(rMatrix.m01),
 177                                         static_cast<Gdiplus::REAL>(rMatrix.m11),
 178                                         static_cast<Gdiplus::REAL>(rMatrix.m02),
 179                                         static_cast<Gdiplus::REAL>(rMatrix.m12) );
 180         }
 181
 182         namespace
 183         {
 184             // TODO(P2): Check whether this gets inlined. If not, make functor
 185             // out of it
 186             inline Gdiplus::PointF implGdiPlusPointFromRealPoint2D( const ::com::sun::star::geometry::RealPoint2D& rPoint )
 187             {
 188                 return Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.X),
 189                                         static_cast<Gdiplus::REAL>(rPoint.Y) );
 190             }
 191
 192             void graphicsPathFromB2DPolygon( GraphicsPathSharedPtr&             rOutput,
 193                                              ::std::vector< Gdiplus::PointF >&  rPoints,
 194                                              const ::basegfx::B2DPolygon&       rPoly,
 195                                              bool bNoLineJoin)
 196             {
 197                 const sal_uInt32 nPoints( rPoly.count() );
 198
 199                 if( nPoints < 2 )
 200                     return;
 201
 202                 rOutput->StartFigure();
 203
 204                 const bool bClosedPolygon( rPoly.isClosed() );
 205
 206                 if( rPoly.areControlPointsUsed() )
 207                 {
 208                     // control points used -> for now, add all
 209                     // segments as curves to GraphicsPath
 210
 211                     // If the polygon is closed, we need to add the
 212                     // first point, thus, one more (can't simply
 213                     // GraphicsPath::CloseFigure() it, since the last
 214                     // point cannot have any control points for GDI+)
 215                     rPoints.resize( 3*nPoints + bClosedPolygon );
 216
 217                     sal_uInt32 nCurrOutput=0;
 218                     for( sal_uInt32 nCurrPoint=0; nCurrPoint<nPoints; ++nCurrPoint )
 219                     {
 220                         const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint( nCurrPoint ) );
 221                         rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
 222                                                                   static_cast<Gdiplus::REAL>(rPoint.getY()) );
 223
 224                         const ::basegfx::B2DPoint& rControlPointA( rPoly.getNextControlPoint( nCurrPoint ) );
 225                         rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rControlPointA.getX()),
 226                                                                   static_cast<Gdiplus::REAL>(rControlPointA.getY()) );
 227
 228                         const ::basegfx::B2DPoint& rControlPointB( rPoly.getPrevControlPoint( (nCurrPoint + 1) % nPoints) );
 229                         rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rControlPointB.getX()),
 230                                                                   static_cast<Gdiplus::REAL>(rControlPointB.getY()) );
 231                     }
 232
 233                     if( bClosedPolygon )
 234                     {
 235                         // add first point again (to be able to pass
 236                         // control points for the last point, see
 237                         // above)
 238                         const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint(0) );
 239                         rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
 240                                                                   static_cast<Gdiplus::REAL>(rPoint.getY()) );
 241
 242                         if(bNoLineJoin && nCurrOutput > 7)
 243                         {
 244                             for(sal_uInt32 a(3); a < nCurrOutput; a+=3)
 245                             {
 246                                 rOutput->StartFigure();
 247                                 rOutput->AddBezier(rPoints[a - 3], rPoints[a - 2], rPoints[a - 1], rPoints[a]);
 248                             }
 249                         }
 250                         else
 251                         {
 252                             rOutput->AddBeziers( &rPoints[0], nCurrOutput );
 253                         }
 254                     }
 255                     else
 256                     {
 257                         // GraphicsPath expects 3(n-1)+1 points (i.e. the
 258                         // last point must not have any trailing control
 259                         // points after it).
 260                         // Therefore, simply don't pass the last two
 261                         // points here.
 262                         if( nCurrOutput > 3 )
 263                         {
 264                             if(bNoLineJoin && nCurrOutput > 7)
 265                             {
 266                                 for(sal_uInt32 a(3); a < nCurrOutput; a+=3)
 267                                 {
 268                                     rOutput->StartFigure();
 269                                     rOutput->AddBezier(rPoints[a - 3], rPoints[a - 2], rPoints[a - 1], rPoints[a]);
 270                                 }
 271                             }
 272                             else
 273                             {
 274                                 rOutput->AddBeziers( &rPoints[0], nCurrOutput-2 );
 275                             }
 276                         }
 277                     }
 278                 }
 279                 else
 280                 {
 281                     // no control points -> no curves, simply add
 282                     // straigt lines to GraphicsPath
 283                     rPoints.resize( nPoints );
 284
 285                     for( sal_uInt32 nCurrPoint=0; nCurrPoint<nPoints; ++nCurrPoint )
 286                     {
 287                         const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint( nCurrPoint ) );
 288                         rPoints[nCurrPoint] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
 289                                                                static_cast<Gdiplus::REAL>(rPoint.getY()) );
 290                     }
 291
 292                     if(bNoLineJoin && nPoints > 2)
 293                     {
 294                         for(sal_uInt32 a(1); a < nPoints; a++)
 295                         {
 296                             rOutput->StartFigure();
 297                             rOutput->AddLine(rPoints[a - 1], rPoints[a]);
 298                         }
 299
 300                         if(bClosedPolygon)
 301                         {
 302                             rOutput->StartFigure();
 303                             rOutput->AddLine(rPoints[nPoints - 1], rPoints[0]);
 304                         }
 305                     }
 306                     else
 307                     {
 308                         rOutput->AddLines( &rPoints[0], nPoints );
 309                     }
 310                 }
 311
 312                 if( bClosedPolygon && !bNoLineJoin )
 313                     rOutput->CloseFigure();
 314             }
 315         }
 316
 317         Gdiplus::PointF gdiPlusPointFromRealPoint2D( const ::com::sun::star::geometry::RealPoint2D& rPoint )
 318         {
 319             return implGdiPlusPointFromRealPoint2D( rPoint );
 320         }
 321
 322         Gdiplus::Rect gdiPlusRectFromIntegerRectangle2D( const geometry::IntegerRectangle2D& rRect )
 323         {
 324             return Gdiplus::Rect( rRect.X1,
 325                                   rRect.Y1,
 326                                   rRect.X2 - rRect.X1,
 327                                   rRect.Y2 - rRect.Y1 );
 328         }
 329
 330         Gdiplus::RectF gdiPlusRectFFromRectangle2D( const geometry::RealRectangle2D& rRect )
 331         {
 332             return Gdiplus::RectF( static_cast<Gdiplus::REAL>(rRect.X1),
 333                                    static_cast<Gdiplus::REAL>(rRect.Y1),
 334                                    static_cast<Gdiplus::REAL>(rRect.X2 - rRect.X1),
 335                                    static_cast<Gdiplus::REAL>(rRect.Y2 - rRect.Y1) );
 336         }
 337
 338         RECT gdiRectFromB2IRect( const ::basegfx::B2IRange& rRect )
 339         {
 340             RECT aRect = {rRect.getMinX(),
 341                           rRect.getMinY(),
 342                           rRect.getMaxX(),
 343                           rRect.getMaxY()};
 344
 345             return aRect;
 346         }
 347
 348         geometry::RealPoint2D realPoint2DFromGdiPlusPointF( const Gdiplus::PointF& rPoint )
 349         {
 350             return geometry::RealPoint2D( rPoint.X, rPoint.Y );
 351         }
 352
 353         geometry::RealRectangle2D realRectangle2DFromGdiPlusRectF( const Gdiplus::RectF& rRect )
 354         {
 355             return geometry::RealRectangle2D( rRect.X, rRect.Y,
 356                                               rRect.X + rRect.Width,
 357                                               rRect.Y + rRect.Height );
 358         }
 359
 360         ::basegfx::B2DPoint b2dPointFromGdiPlusPointF( const Gdiplus::PointF& rPoint )
 361         {
 362             return ::basegfx::B2DPoint( rPoint.X, rPoint.Y );
 363         }
 364
 365         ::basegfx::B2DRange b2dRangeFromGdiPlusRectF( const Gdiplus::RectF& rRect )
 366         {
 367             return ::basegfx::B2DRange( rRect.X, rRect.Y,
 368                                         rRect.X + rRect.Width,
 369                                         rRect.Y + rRect.Height );
 370         }
 371
 372         uno::Sequence< double > argbToDoubleSequence( const Gdiplus::ARGB& rColor )
 373         {
 374             // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
 375             uno::Sequence< double > aRet(4);
 376
 377             aRet[0] = ((rColor >> 16) & 0xFF) / 255.0;  // red
 378             aRet[1] = ((rColor >> 8) & 0xFF) / 255.0;   // green
 379             aRet[2] = (rColor & 0xFF) / 255.0;          // blue
 380             aRet[3] = ((rColor >> 24) & 0xFF) / 255.0;  // alpha
 381
 382             return aRet;
 383         }
 384
 385         uno::Sequence< sal_Int8 > argbToIntSequence( const Gdiplus::ARGB& rColor )
 386         {
 387             // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
 388             uno::Sequence< sal_Int8 > aRet(4);
 389
 390             aRet[0] = static_cast<sal_Int8>((rColor >> 16) & 0xFF); // red
 391             aRet[1] = static_cast<sal_Int8>((rColor >> 8) & 0xFF);  // green
 392             aRet[2] = static_cast<sal_Int8>(rColor & 0xFF);         // blue
 393             aRet[3] = static_cast<sal_Int8>((rColor >> 24) & 0xFF); // alpha
 394
 395             return aRet;
 396         }
 397
 398         Gdiplus::ARGB sequenceToArgb( const uno::Sequence< sal_Int8 >& rColor )
 399         {
 400             ENSURE_OR_THROW( rColor.getLength() > 2,
 401                               "sequenceToArgb: need at least three channels" );
 402
 403             // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
 404             Gdiplus::ARGB aColor;
 405
 406             aColor = (static_cast<sal_uInt8>(rColor[0]) << 16) | (static_cast<sal_uInt8>(rColor[1]) << 8) | static_cast<sal_uInt8>(rColor[2]);
 407
 408             if( rColor.getLength() > 3 )
 409                 aColor |= static_cast<sal_uInt8>(rColor[3]) << 24;
 410
 411             return aColor;
 412         }
 413
 414         Gdiplus::ARGB sequenceToArgb( const uno::Sequence< double >& rColor )
 415         {
 416             ENSURE_OR_THROW( rColor.getLength() > 2,
 417                               "sequenceToColor: need at least three channels" );
 418
 419             // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
 420             Gdiplus::ARGB aColor;
 421
 422             ::canvas::tools::verifyRange(rColor[0],0.0,1.0);
 423             ::canvas::tools::verifyRange(rColor[1],0.0,1.0);
 424             ::canvas::tools::verifyRange(rColor[2],0.0,1.0);
 425
 426             aColor =
 427                 (static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[0] ) ) << 16) |
 428                 (static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[1] ) ) << 8) |
 429                 static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[2] ) );
 430
 431             if( rColor.getLength() > 3 )
 432             {
 433                 ::canvas::tools::verifyRange(rColor[3],0.0,1.0);
 434                 aColor |= static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[3] ) ) << 24;
 435             }
 436
 437             return aColor;
 438         }
 439
 440         GraphicsPathSharedPtr graphicsPathFromRealPoint2DSequence( const uno::Sequence< uno::Sequence< geometry::RealPoint2D > >& points )
 441         {
 442             GraphicsPathSharedPtr pRes( new Gdiplus::GraphicsPath() );
 443             ::std::vector< Gdiplus::PointF > aPoints;
 444
 445             sal_Int32 nCurrPoly;
 446             for( nCurrPoly=0; nCurrPoly<points.getLength(); ++nCurrPoly )
 447             {
 448                 const sal_Int32 nCurrSize( points[nCurrPoly].getLength() );
 449                 if( nCurrSize )
 450                 {
 451                     aPoints.resize( nCurrSize );
 452
 453                     // TODO(F1): Closed/open polygons
 454
 455                     // convert from RealPoint2D array to Gdiplus::PointF array
 456                     ::std::transform( const_cast< uno::Sequence< geometry::RealPoint2D >& >(points[nCurrPoly]).getArray(),
 457                                       const_cast< uno::Sequence< geometry::RealPoint2D >& >(points[nCurrPoly]).getArray()+nCurrSize,
 458                                       aPoints.begin(),
 459                                       implGdiPlusPointFromRealPoint2D );
 460
 461                     pRes->AddLines( &aPoints[0], nCurrSize );
 462                 }
 463             }
 464
 465             return pRes;
 466         }
 467
 468         GraphicsPathSharedPtr graphicsPathFromB2DPolygon( const ::basegfx::B2DPolygon& rPoly, bool bNoLineJoin )
 469         {
 470             GraphicsPathSharedPtr               pRes( new Gdiplus::GraphicsPath() );
 471             ::std::vector< Gdiplus::PointF >    aPoints;
 472
 473             graphicsPathFromB2DPolygon( pRes, aPoints, rPoly, bNoLineJoin );
 474
 475             return pRes;
 476         }
 477
 478         GraphicsPathSharedPtr graphicsPathFromB2DPolyPolygon( const ::basegfx::B2DPolyPolygon& rPoly, bool bNoLineJoin )
 479         {
 480             GraphicsPathSharedPtr               pRes( new Gdiplus::GraphicsPath() );
 481             ::std::vector< Gdiplus::PointF >    aPoints;
 482
 483             const sal_uInt32 nPolies( rPoly.count() );
 484             for( sal_uInt32 nCurrPoly=0; nCurrPoly<nPolies; ++nCurrPoly )
 485             {
 486                 graphicsPathFromB2DPolygon( pRes,
 487                                             aPoints,
 488                                             rPoly.getB2DPolygon( nCurrPoly ),
 489                                             bNoLineJoin);
 490             }
 491
 492             return pRes;
 493         }
 494
 495         GraphicsPathSharedPtr graphicsPathFromXPolyPolygon2D( const uno::Reference< rendering::XPolyPolygon2D >& xPoly, bool bNoLineJoin )
 496         {
 497             LinePolyPolygon* pPolyImpl = dynamic_cast< LinePolyPolygon* >( xPoly.get() );
 498
 499             if( pPolyImpl )
 500             {
 501                 return pPolyImpl->getGraphicsPath( bNoLineJoin );
 502             }
 503             else
 504             {
 505                 return tools::graphicsPathFromB2DPolyPolygon(
 506                     polyPolygonFromXPolyPolygon2D( xPoly ), bNoLineJoin );
 507             }
 508         }
 509
 510         bool drawGdiPlusBitmap( const GraphicsSharedPtr& rGraphics,
 511                                 const BitmapSharedPtr&   rBitmap )
 512         {
 513             Gdiplus::PointF aPoint;
 514             return (Gdiplus::Ok == rGraphics->DrawImage( rBitmap.get(),
 515                                                          aPoint ) );
 516         }
 517
 518         bool drawDIBits( const GraphicsSharedPtr& rGraphics,
 519                          const BITMAPINFO&        rBI,
 520                          const void*              pBits )
 521         {
 522             BitmapSharedPtr pBitmap(
 523                 Gdiplus::Bitmap::FromBITMAPINFO( &rBI,
 524                                                  (void*)pBits ) );
 525
 526             return drawGdiPlusBitmap( rGraphics,
 527                                       pBitmap );
 528         }
 529
 530         bool drawRGBABits( const GraphicsSharedPtr& rGraphics,
 531                            const RawRGBABitmap&     rRawRGBAData )
 532         {
 533             BitmapSharedPtr pBitmap( new Gdiplus::Bitmap( rRawRGBAData.mnWidth,
 534                                                           rRawRGBAData.mnHeight,
 535                                                           PixelFormat32bppARGB ) );
 536
 537             Gdiplus::BitmapData aBmpData;
 538             aBmpData.Width       = rRawRGBAData.mnWidth;
 539             aBmpData.Height      = rRawRGBAData.mnHeight;
 540             aBmpData.Stride      = 4*aBmpData.Width; // bottom-up format
 541             aBmpData.PixelFormat = PixelFormat32bppARGB;
 542             aBmpData.Scan0       = rRawRGBAData.mpBitmapData.get();
 543
 544             const Gdiplus::Rect aRect( 0,0,aBmpData.Width,aBmpData.Height );
 545             if( Gdiplus::Ok != pBitmap->LockBits( &aRect,
 546                                                   Gdiplus::ImageLockModeWrite | Gdiplus::ImageLockModeUserInputBuf,
 547                                                   PixelFormat32bppARGB,
 548                                                   &aBmpData ) )
 549             {
 550                 return false;
 551             }
 552
 553             // commit data to bitmap
 554             pBitmap->UnlockBits( &aBmpData );
 555
 556             return drawGdiPlusBitmap( rGraphics,
 557                                       pBitmap );
 558         }
 559
 560         BitmapSharedPtr bitmapFromXBitmap( const uno::Reference< rendering::XBitmap >& xBitmap )
 561         {
 562             BitmapProvider* pBitmapProvider = dynamic_cast< BitmapProvider* >(xBitmap.get());
 563
 564             if( pBitmapProvider )
 565             {
 566                 IBitmapSharedPtr pBitmap( pBitmapProvider->getBitmap() );
 567                 return pBitmap->getBitmap();
 568             }
 569             else
 570             {
 571                 // not a native CanvasBitmap, extract VCL bitmap and
 572                 // render into GDI+ bitmap of similar size
 573                 // =================================================
 574
 575                 const geometry::IntegerSize2D aBmpSize( xBitmap->getSize() );
 576                 BitmapSharedPtr               pBitmap;
 577
 578                 if( xBitmap->hasAlpha() )
 579                 {
 580                     // TODO(P2): At least for the alpha bitmap case, it
 581                     // would be possible to generate the corresponding
 582                     // bitmap directly
 583                     pBitmap.reset( new Gdiplus::Bitmap( aBmpSize.Width,
 584                                                         aBmpSize.Height,
 585                                                         PixelFormat32bppARGB ) );
 586                 }
 587                 else
 588                 {
 589                     // TODO(F2): Might be wise to create bitmap compatible
 590                     // to the VCL bitmap. Also, check whether the VCL
 591                     // bitmap's system handles can be used to create the
 592                     // GDI+ bitmap (currently, it does not seem so).
 593                     pBitmap.reset( new Gdiplus::Bitmap( aBmpSize.Width,
 594                                                         aBmpSize.Height,
 595                                                         PixelFormat24bppRGB ) );
 596                 }
 597
 598                 GraphicsSharedPtr pGraphics(createGraphicsFromBitmap(pBitmap));
 599                 tools::setupGraphics(*pGraphics);
 600                 if( !drawVCLBitmapFromXBitmap(
 601                         pGraphics,
 602                         xBitmap) )
 603                 {
 604                     pBitmap.reset();
 605                 }
 606
 607                 return pBitmap;
 608             }
 609         }
 610
 611         CanvasFont::ImplRef canvasFontFromXFont( const uno::Reference< rendering::XCanvasFont >& xFont )
 612         {
 613             CanvasFont* pCanvasFont = dynamic_cast< CanvasFont* >(xFont.get());
 614
 615             ENSURE_ARG_OR_THROW( pCanvasFont,
 616                              "canvasFontFromXFont(): Invalid XFont (or incompatible font for this XCanvas)" );
 617
 618             return CanvasFont::ImplRef( pCanvasFont );
 619         }
 620
 621         void setModulateImageAttributes( Gdiplus::ImageAttributes& o_rAttr,
 622                                          double                    nRedModulation,
 623                                          double                    nGreenModulation,
 624                                          double                    nBlueModulation,
 625                                          double                    nAlphaModulation )
 626         {
 627             // This gets rather verbose, but we have to setup a color
 628             // transformation matrix, in order to incorporate the global
 629             // alpha value mfAlpha into the bitmap rendering.
 630             Gdiplus::ColorMatrix     aColorMatrix;
 631
 632             aColorMatrix.m[0][0] = static_cast<Gdiplus::REAL>(nRedModulation);
 633             aColorMatrix.m[0][1] = 0.0;
 634             aColorMatrix.m[0][2] = 0.0;
 635             aColorMatrix.m[0][3] = 0.0;
 636             aColorMatrix.m[0][4] = 0.0;
 637
 638             aColorMatrix.m[1][0] = 0.0;
 639             aColorMatrix.m[1][1] = static_cast<Gdiplus::REAL>(nGreenModulation);
 640             aColorMatrix.m[1][2] = 0.0;
 641             aColorMatrix.m[1][3] = 0.0;
 642             aColorMatrix.m[1][4] = 0.0;
 643
 644             aColorMatrix.m[2][0] = 0.0;
 645             aColorMatrix.m[2][1] = 0.0;
 646             aColorMatrix.m[2][2] = static_cast<Gdiplus::REAL>(nBlueModulation);
 647             aColorMatrix.m[2][3] = 0.0;
 648             aColorMatrix.m[2][4] = 0.0;
 649
 650             aColorMatrix.m[3][0] = 0.0;
 651             aColorMatrix.m[3][1] = 0.0;
 652             aColorMatrix.m[3][2] = 0.0;
 653             aColorMatrix.m[3][3] = static_cast<Gdiplus::REAL>(nAlphaModulation);
 654             aColorMatrix.m[3][4] = 0.0;
 655
 656             aColorMatrix.m[4][0] = 0.0;
 657             aColorMatrix.m[4][1] = 0.0;
 658             aColorMatrix.m[4][2] = 0.0;
 659             aColorMatrix.m[4][3] = 0.0;
 660             aColorMatrix.m[4][4] = 1.0;
 661
 662             o_rAttr.SetColorMatrix( &aColorMatrix,
 663                                     Gdiplus::ColorMatrixFlagsDefault,
 664                                     Gdiplus::ColorAdjustTypeDefault );
 665         }
 666
 667     } // namespace tools
 668 } // namespace dxcanvas