vcl/source/gdi/gdimetafiletools.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <vcl/gdimetafiletools.hxx>
  21 #include <vcl/metaact.hxx>
  22 #include <vcl/canvastools.hxx>
  23 #include <basegfx/polygon/b2dpolygonclipper.hxx>
  24 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  25 #include <basegfx/polygon/b2dpolypolygontools.hxx>
  26 #include <basegfx/polygon/b2dpolygontools.hxx>
  27 #include <vcl/virdev.hxx>
  28 #include <vcl/svapp.hxx>
  29 #include <vcl/graphictools.hxx>
  30 #include <osl/diagnose.h>
  31 #include <tools/stream.hxx>
  32
  33 // helpers
  34
  35 namespace
  36 {
  37     bool handleGeometricContent(
  38         const basegfx::B2DPolyPolygon& rClip,
  39         const basegfx::B2DPolyPolygon& rSource,
  40         GDIMetaFile& rTarget,
  41         bool bStroke)
  42     {
  43         if(rSource.count() && rClip.count())
  44         {
  45             const basegfx::B2DPolyPolygon aResult(
  46                 basegfx::utils::clipPolyPolygonOnPolyPolygon(
  47                     rSource,
  48                     rClip,
  49                     true, // inside
  50                     bStroke));
  51
  52             if(aResult.count())
  53             {
  54                 if(aResult == rSource)
  55                 {
  56                     // not clipped, but inside. Add original
  57                     return false;
  58                 }
  59                 else
  60                 {
  61                     // add clipped geometry
  62                     if(bStroke)
  63                     {
  64                         for(auto const& rB2DPolygon : aResult)
  65                         {
  66                             rTarget.AddAction(
  67                                 new MetaPolyLineAction(
  68                                         tools::Polygon(rB2DPolygon)));
  69                         }
  70                     }
  71                     else
  72                     {
  73                         rTarget.AddAction(
  74                             new MetaPolyPolygonAction(
  75                                 tools::PolyPolygon(aResult)));
  76                     }
  77                 }
  78             }
  79         }
  80
  81         return true;
  82     }
  83
  84     bool handleGradientContent(
  85         const basegfx::B2DPolyPolygon& rClip,
  86         const basegfx::B2DPolyPolygon& rSource,
  87         const Gradient& rGradient,
  88         GDIMetaFile& rTarget)
  89     {
  90         if(rSource.count() && rClip.count())
  91         {
  92             const basegfx::B2DPolyPolygon aResult(
  93                 basegfx::utils::clipPolyPolygonOnPolyPolygon(
  94                     rSource,
  95                     rClip,
  96                     true, // inside
  97                     false)); // stroke
  98
  99             if(aResult.count())
 100             {
 101                 if(aResult == rSource)
 102                 {
 103                     // not clipped, but inside. Add original
 104                     return false;
 105                 }
 106                 else
 107                 {
 108                     // add clipped geometry
 109                     rTarget.AddAction(
 110                         new MetaGradientExAction(
 111                             tools::PolyPolygon(aResult),
 112                             rGradient));
 113                 }
 114             }
 115         }
 116
 117         return true;
 118     }
 119
 120     bool handleBitmapContent(
 121         const basegfx::B2DPolyPolygon& rClip,
 122         const Point& rPoint,
 123         const Size& rSize,
 124         const BitmapEx& rBitmapEx,
 125         GDIMetaFile& rTarget)
 126     {
 127         if(!rSize.Width() || !rSize.Height() || rBitmapEx.IsEmpty())
 128         {
 129             // bitmap or size is empty
 130             return true;
 131         }
 132
 133         const basegfx::B2DRange aLogicBitmapRange(
 134             rPoint.X(), rPoint.Y(),
 135             rPoint.X() + rSize.Width(), rPoint.Y() + rSize.Height());
 136         const basegfx::B2DPolyPolygon aClipOfBitmap(
 137             basegfx::utils::clipPolyPolygonOnRange(
 138                 rClip,
 139                 aLogicBitmapRange,
 140                 true,
 141                 false)); // stroke
 142
 143         if(!aClipOfBitmap.count())
 144         {
 145             // outside clip region
 146             return true;
 147         }
 148
 149         // inside or overlapping. Use area to find out if it is completely
 150         // covering (inside) or overlapping
 151         const double fClipArea(basegfx::utils::getArea(aClipOfBitmap));
 152         const double fBitmapArea(
 153             aLogicBitmapRange.getWidth() * aLogicBitmapRange.getWidth() +
 154             aLogicBitmapRange.getHeight() * aLogicBitmapRange.getHeight());
 155         const double fFactor(fClipArea / fBitmapArea);
 156
 157         if(basegfx::fTools::more(fFactor, 1.0 - 0.001))
 158         {
 159             // completely covering (with 0.1% tolerance)
 160             return false;
 161         }
 162
 163         // needs clipping (with 0.1% tolerance). Prepare VirtualDevice
 164         // in pixel mode for alpha channel painting (black is transparent,
 165         // white to paint 100% opacity)
 166         const Size aSizePixel(rBitmapEx.GetSizePixel());
 167         ScopedVclPtrInstance< VirtualDevice > aVDev;
 168
 169         aVDev->SetOutputSizePixel(aSizePixel);
 170         aVDev->EnableMapMode(false);
 171         aVDev->SetFillColor( COL_WHITE);
 172         aVDev->SetLineColor();
 173
 174         if(rBitmapEx.IsTransparent())
 175         {
 176             // use given alpha channel
 177             aVDev->DrawBitmap(Point(0, 0), rBitmapEx.GetAlpha().GetBitmap());
 178         }
 179         else
 180         {
 181             // reset alpha channel
 182             aVDev->SetBackground(Wallpaper(COL_BLACK));
 183             aVDev->Erase();
 184         }
 185
 186         // transform polygon from clipping to pixel coordinates
 187         basegfx::B2DPolyPolygon aPixelPoly(aClipOfBitmap);
 188         basegfx::B2DHomMatrix aTransform;
 189
 190         aTransform.translate(-aLogicBitmapRange.getMinX(), -aLogicBitmapRange.getMinY());
 191         aTransform.scale(
 192             static_cast< double >(aSizePixel.Width()) / aLogicBitmapRange.getWidth(),
 193             static_cast< double >(aSizePixel.Height()) / aLogicBitmapRange.getHeight());
 194         aPixelPoly.transform(aTransform);
 195
 196         // to fill the non-covered parts, use the Xor fill rule of
 197         // tools::PolyPolygon painting. Start with an all-covering polygon and
 198         // add the clip polygon one
 199         basegfx::B2DPolyPolygon aInvertPixelPoly;
 200
 201         aInvertPixelPoly.append(
 202             basegfx::utils::createPolygonFromRect(
 203                 basegfx::B2DRange(
 204                     0.0, 0.0,
 205                     aSizePixel.Width(), aSizePixel.Height())));
 206         aInvertPixelPoly.append(aPixelPoly);
 207
 208         // paint as alpha
 209         aVDev->DrawPolyPolygon(aInvertPixelPoly);
 210
 211         // get created alpha mask and set defaults
 212         AlphaMask aAlpha(
 213             aVDev->GetBitmap(
 214                 Point(0, 0),
 215                 aSizePixel));
 216
 217         aAlpha.SetPrefSize(rBitmapEx.GetPrefSize());
 218         aAlpha.SetPrefMapMode(rBitmapEx.GetPrefMapMode());
 219
 220         // add new action replacing the old one
 221         rTarget.AddAction(
 222             new MetaBmpExScaleAction(
 223                 Point(
 224                     basegfx::fround(aLogicBitmapRange.getMinX()),
 225                     basegfx::fround(aLogicBitmapRange.getMinY())),
 226                 Size(
 227                     basegfx::fround(aLogicBitmapRange.getWidth()),
 228                     basegfx::fround(aLogicBitmapRange.getHeight())),
 229                 BitmapEx(rBitmapEx.GetBitmap(), aAlpha)));
 230
 231         return true;
 232     }
 233
 234     void addSvtGraphicStroke(const SvtGraphicStroke& rStroke, GDIMetaFile& rTarget)
 235     {
 236         // write SvtGraphicFill
 237         SvMemoryStream aMemStm;
 238         WriteSvtGraphicStroke( aMemStm, rStroke );
 239         rTarget.AddAction(
 240             new MetaCommentAction(
 241                 "XPATHSTROKE_SEQ_BEGIN",
 242                 0,
 243                 static_cast< const sal_uInt8* >(aMemStm.GetData()),
 244                 aMemStm.TellEnd()));
 245     }
 246
 247     void addSvtGraphicFill(const SvtGraphicFill &rFilling, GDIMetaFile& rTarget)
 248     {
 249         // write SvtGraphicFill
 250         SvMemoryStream aMemStm;
 251         WriteSvtGraphicFill( aMemStm, rFilling );
 252         rTarget.AddAction(
 253             new MetaCommentAction(
 254                 "XPATHFILL_SEQ_BEGIN",
 255                 0,
 256                 static_cast< const sal_uInt8* >(aMemStm.GetData()),
 257                 aMemStm.TellEnd()));
 258     }
 259 } // end of anonymous namespace
 260
 261 // #i121267# Tooling to internally clip geometry against internal clip regions
 262
 263 void clipMetafileContentAgainstOwnRegions(GDIMetaFile& rSource)
 264 {
 265     const sal_uLong nObjCount(rSource.GetActionSize());
 266
 267     if(!nObjCount)
 268     {
 269         return;
 270     }
 271
 272     // prepare target data container and push/pop stack data
 273     GDIMetaFile aTarget;
 274     bool bChanged(false);
 275     std::vector< basegfx::B2DPolyPolygon > aClips;
 276     std::vector< PushFlags > aPushFlags;
 277     std::vector< MapMode > aMapModes;
 278
 279     // start with empty region
 280     aClips.emplace_back();
 281
 282     // start with default MapMode (MapUnit::MapPixel)
 283     aMapModes.emplace_back();
 284
 285     for(sal_uLong i(0); i < nObjCount; ++i)
 286     {
 287         const MetaAction* pAction(rSource.GetAction(i));
 288         const MetaActionType nType(pAction->GetType());
 289         bool bDone(false);
 290
 291         // basic operation takes care of clipregion actions (four) and push/pop of these
 292         // to steer the currently set clip region. There *is* an active
 293         // clip region when (aClips.size() && aClips.back().count()), see
 294         // below
 295         switch(nType)
 296         {
 297             case MetaActionType::CLIPREGION :
 298             {
 299                 const MetaClipRegionAction* pA = static_cast< const MetaClipRegionAction* >(pAction);
 300
 301                 if(pA->IsClipping())
 302                 {
 303                     const vcl::Region& rRegion = pA->GetRegion();
 304                     const basegfx::B2DPolyPolygon aNewClip(rRegion.GetAsB2DPolyPolygon());
 305
 306                     aClips.back() = aNewClip;
 307                 }
 308                 else
 309                 {
 310                     aClips.back() = basegfx::B2DPolyPolygon();
 311                 }
 312
 313                 break;
 314             }
 315
 316             case MetaActionType::ISECTRECTCLIPREGION :
 317             {
 318                 const MetaISectRectClipRegionAction* pA = static_cast< const MetaISectRectClipRegionAction* >(pAction);
 319                 const tools::Rectangle& rRect = pA->GetRect();
 320
 321                 if(!rRect.IsEmpty() && !aClips.empty() && aClips.back().count())
 322                 {
 323                     const basegfx::B2DRange aClipRange(vcl::unotools::b2DRectangleFromRectangle(rRect));
 324
 325                     aClips.back() = basegfx::utils::clipPolyPolygonOnRange(
 326                         aClips.back(),
 327                         aClipRange,
 328                         true, // inside
 329                         false); // stroke
 330                 }
 331                 break;
 332             }
 333
 334             case MetaActionType::ISECTREGIONCLIPREGION :
 335             {
 336                 const MetaISectRegionClipRegionAction* pA = static_cast< const MetaISectRegionClipRegionAction* >(pAction);
 337                 const vcl::Region& rRegion = pA->GetRegion();
 338
 339                 if(!rRegion.IsEmpty() && !aClips.empty() && aClips.back().count())
 340                 {
 341                     const basegfx::B2DPolyPolygon aNewClip(rRegion.GetAsB2DPolyPolygon());
 342
 343                     aClips.back() = basegfx::utils::clipPolyPolygonOnPolyPolygon(
 344                         aClips.back(),
 345                         aNewClip,
 346                         true,  // inside
 347                         false); // stroke
 348                 }
 349                 break;
 350             }
 351
 352             case MetaActionType::MOVECLIPREGION :
 353             {
 354                 const MetaMoveClipRegionAction* pA = static_cast< const MetaMoveClipRegionAction* >(pAction);
 355                 const long aHorMove(pA->GetHorzMove());
 356                 const long aVerMove(pA->GetVertMove());
 357
 358                 if((aHorMove || aVerMove) && !aClips.empty() && aClips.back().count())
 359                 {
 360                     aClips.back().transform(
 361                         basegfx::utils::createTranslateB2DHomMatrix(
 362                             aHorMove,
 363                             aVerMove));
 364                 }
 365                 break;
 366             }
 367
 368             case MetaActionType::PUSH :
 369             {
 370                 const MetaPushAction* pA = static_cast< const MetaPushAction* >(pAction);
 371                 const PushFlags nFlags(pA->GetFlags());
 372
 373                 aPushFlags.push_back(nFlags);
 374
 375                 if(nFlags & PushFlags::CLIPREGION)
 376                 {
 377                     aClips.push_back(aClips.back());
 378                 }
 379
 380                 if(nFlags & PushFlags::MAPMODE)
 381                 {
 382                     aMapModes.push_back(aMapModes.back());
 383                 }
 384                 break;
 385             }
 386
 387             case MetaActionType::POP :
 388             {
 389
 390                 if(!aPushFlags.empty())
 391                 {
 392                     const PushFlags nFlags(aPushFlags.back());
 393                     aPushFlags.pop_back();
 394
 395                     if(nFlags & PushFlags::CLIPREGION)
 396                     {
 397                         if(aClips.size() > 1)
 398                         {
 399                             aClips.pop_back();
 400                         }
 401                         else
 402                         {
 403                             OSL_ENSURE(false, "Wrong POP() in ClipRegions (!)");
 404                         }
 405                     }
 406
 407                     if(nFlags & PushFlags::MAPMODE)
 408                     {
 409                         if(aMapModes.size() > 1)
 410                         {
 411                             aMapModes.pop_back();
 412                         }
 413                         else
 414                         {
 415                             OSL_ENSURE(false, "Wrong POP() in MapModes (!)");
 416                         }
 417                     }
 418                 }
 419                 else
 420                 {
 421                     OSL_ENSURE(false, "Invalid pop() without push() (!)");
 422                 }
 423
 424                 break;
 425             }
 426
 427             case MetaActionType::MAPMODE :
 428             {
 429                 const MetaMapModeAction* pA = static_cast< const MetaMapModeAction* >(pAction);
 430
 431                 aMapModes.back() = pA->GetMapMode();
 432                 break;
 433             }
 434
 435             default:
 436             {
 437                 break;
 438             }
 439         }
 440
 441         // this area contains all actions which could potentially be clipped. Since
 442         // this tooling is only a fallback (see comments in header), only the needed
 443         // actions will be implemented. Extend using the pattern for the already
 444         // implemented actions.
 445         if(!aClips.empty() && aClips.back().count())
 446         {
 447             switch(nType)
 448             {
 449
 450                 // pixel actions, just check on inside
 451
 452                 case MetaActionType::PIXEL :
 453                 {
 454                     const MetaPixelAction* pA = static_cast< const MetaPixelAction* >(pAction);
 455                     const Point& rPoint = pA->GetPoint();
 456
 457                     if(!basegfx::utils::isInside(
 458                         aClips.back(),
 459                         basegfx::B2DPoint(rPoint.X(), rPoint.Y())))
 460                     {
 461                         // when not inside, do not add original
 462                         bDone = true;
 463                     }
 464                     break;
 465                 }
 466
 467                 case MetaActionType::POINT :
 468                 {
 469                     const MetaPointAction* pA = static_cast< const MetaPointAction* >(pAction);
 470                     const Point& rPoint = pA->GetPoint();
 471
 472                     if(!basegfx::utils::isInside(
 473                         aClips.back(),
 474                         basegfx::B2DPoint(rPoint.X(), rPoint.Y())))
 475                     {
 476                         // when not inside, do not add original
 477                         bDone = true;
 478                     }
 479                     break;
 480                 }
 481
 482                 // geometry actions
 483
 484                 case MetaActionType::LINE :
 485                 {
 486                     const MetaLineAction* pA = static_cast< const MetaLineAction* >(pAction);
 487                     const Point& rStart(pA->GetStartPoint());
 488                     const Point& rEnd(pA->GetEndPoint());
 489                     basegfx::B2DPolygon aLine;
 490
 491                     aLine.append(basegfx::B2DPoint(rStart.X(), rStart.Y()));
 492                     aLine.append(basegfx::B2DPoint(rEnd.X(), rEnd.Y()));
 493
 494                     bDone = handleGeometricContent(
 495                         aClips.back(),
 496                         basegfx::B2DPolyPolygon(aLine),
 497                         aTarget,
 498                         true); // stroke
 499                     break;
 500                 }
 501
 502                 case MetaActionType::RECT :
 503                 {
 504                     const MetaRectAction* pA = static_cast< const MetaRectAction* >(pAction);
 505                     const tools::Rectangle& rRect = pA->GetRect();
 506
 507                     if(rRect.IsEmpty())
 508                     {
 509                         bDone = true;
 510                     }
 511                     else
 512                     {
 513
 514                         bDone = handleGeometricContent(
 515                             aClips.back(),
 516                             basegfx::B2DPolyPolygon(
 517                                 basegfx::utils::createPolygonFromRect(
 518                                         vcl::unotools::b2DRectangleFromRectangle(rRect))),
 519                             aTarget,
 520                             false); // stroke
 521                     }
 522                     break;
 523                 }
 524
 525                 case MetaActionType::ROUNDRECT :
 526                 {
 527                     const MetaRoundRectAction* pA = static_cast< const MetaRoundRectAction* >(pAction);
 528                     const tools::Rectangle& rRect = pA->GetRect();
 529
 530                     if(rRect.IsEmpty())
 531                     {
 532                         bDone = true;
 533                     }
 534                     else
 535                     {
 536                         const sal_uInt32 nHor(pA->GetHorzRound());
 537                         const sal_uInt32 nVer(pA->GetVertRound());
 538                         const basegfx::B2DRange aRange(vcl::unotools::b2DRectangleFromRectangle(rRect));
 539                         basegfx::B2DPolygon aOutline;
 540
 541                         if(nHor || nVer)
 542                         {
 543                             double fRadiusX((nHor * 2.0) / (aRange.getWidth() > 0.0 ? aRange.getWidth() : 1.0));
 544                             double fRadiusY((nVer * 2.0) / (aRange.getHeight() > 0.0 ? aRange.getHeight() : 1.0));
 545                             fRadiusX = std::max(0.0, std::min(1.0, fRadiusX));
 546                             fRadiusY = std::max(0.0, std::min(1.0, fRadiusY));
 547
 548                             aOutline = basegfx::utils::createPolygonFromRect(aRange, fRadiusX, fRadiusY);
 549                         }
 550                         else
 551                         {
 552                             aOutline = basegfx::utils::createPolygonFromRect(aRange);
 553                         }
 554
 555                         bDone = handleGeometricContent(
 556                             aClips.back(),
 557                             basegfx::B2DPolyPolygon(aOutline),
 558                             aTarget,
 559                             false); // stroke
 560                     }
 561                     break;
 562                 }
 563
 564                 case MetaActionType::ELLIPSE :
 565                 {
 566                     const MetaEllipseAction* pA = static_cast< const MetaEllipseAction* >(pAction);
 567                     const tools::Rectangle& rRect = pA->GetRect();
 568
 569                     if(rRect.IsEmpty())
 570                     {
 571                         bDone = true;
 572                     }
 573                     else
 574                     {
 575                         const basegfx::B2DRange aRange(vcl::unotools::b2DRectangleFromRectangle(rRect));
 576
 577                         bDone = handleGeometricContent(
 578                             aClips.back(),
 579                             basegfx::B2DPolyPolygon(
 580                                 basegfx::utils::createPolygonFromEllipse(
 581                                     aRange.getCenter(),
 582                                     aRange.getWidth() * 0.5,
 583                                     aRange.getHeight() * 0.5)),
 584                             aTarget,
 585                             false); // stroke
 586                     }
 587                     break;
 588                 }
 589
 590                 case MetaActionType::ARC :
 591                 {
 592                     const MetaArcAction* pA = static_cast< const MetaArcAction* >(pAction);
 593                     const tools::Rectangle& rRect = pA->GetRect();
 594
 595                     if(rRect.IsEmpty())
 596                     {
 597                         bDone = true;
 598                     }
 599                     else
 600                     {
 601                         const tools::Polygon aToolsPoly(
 602                                 rRect,
 603                                 pA->GetStartPoint(),
 604                                 pA->GetEndPoint(),
 605                                 PolyStyle::Arc);
 606
 607                         bDone = handleGeometricContent(
 608                             aClips.back(),
 609                             basegfx::B2DPolyPolygon(aToolsPoly.getB2DPolygon()),
 610                             aTarget,
 611                             true); // stroke
 612                     }
 613                     break;
 614                 }
 615
 616                 case MetaActionType::PIE :
 617                 {
 618                     const MetaPieAction* pA = static_cast< const MetaPieAction* >(pAction);
 619                     const tools::Rectangle& rRect = pA->GetRect();
 620
 621                     if(rRect.IsEmpty())
 622                     {
 623                         bDone = true;
 624                     }
 625                     else
 626                     {
 627                         const tools::Polygon aToolsPoly(
 628                                 rRect,
 629                                 pA->GetStartPoint(),
 630                                 pA->GetEndPoint(),
 631                                 PolyStyle::Pie);
 632
 633                         bDone = handleGeometricContent(
 634                             aClips.back(),
 635                             basegfx::B2DPolyPolygon(aToolsPoly.getB2DPolygon()),
 636                             aTarget,
 637                             false); // stroke
 638                     }
 639                     break;
 640                 }
 641
 642                 case MetaActionType::CHORD :
 643                 {
 644                     const MetaChordAction* pA = static_cast< const MetaChordAction* >(pAction);
 645                     const tools::Rectangle& rRect = pA->GetRect();
 646
 647                     if(rRect.IsEmpty())
 648                     {
 649                         bDone = true;
 650                     }
 651                     else
 652                     {
 653                         const tools::Polygon aToolsPoly(
 654                                 rRect,
 655                                 pA->GetStartPoint(),
 656                                 pA->GetEndPoint(),
 657                                 PolyStyle::Chord);
 658
 659                         bDone = handleGeometricContent(
 660                             aClips.back(),
 661                             basegfx::B2DPolyPolygon(aToolsPoly.getB2DPolygon()),
 662                             aTarget,
 663                             false); // stroke
 664                     }
 665                     break;
 666                 }
 667
 668                 case MetaActionType::POLYLINE :
 669                 {
 670                     const MetaPolyLineAction* pA = static_cast< const MetaPolyLineAction* >(pAction);
 671
 672                     bDone = handleGeometricContent(
 673                         aClips.back(),
 674                         basegfx::B2DPolyPolygon(pA->GetPolygon().getB2DPolygon()),
 675                         aTarget,
 676                         true); // stroke
 677                     break;
 678                 }
 679
 680                 case MetaActionType::POLYGON :
 681                 {
 682                     const MetaPolygonAction* pA = static_cast< const MetaPolygonAction* >(pAction);
 683
 684                     bDone = handleGeometricContent(
 685                         aClips.back(),
 686                         basegfx::B2DPolyPolygon(pA->GetPolygon().getB2DPolygon()),
 687                         aTarget,
 688                         false); // stroke
 689                     break;
 690                 }
 691
 692                 case MetaActionType::POLYPOLYGON :
 693                 {
 694                     const MetaPolyPolygonAction* pA = static_cast< const MetaPolyPolygonAction* >(pAction);
 695                     const tools::PolyPolygon& rPoly = pA->GetPolyPolygon();
 696
 697                     bDone = handleGeometricContent(
 698                         aClips.back(),
 699                         rPoly.getB2DPolyPolygon(),
 700                         aTarget,
 701                         false); // stroke
 702                     break;
 703                 }
 704
 705                 // bitmap actions, create BitmapEx with alpha channel derived
 706                 // from clipping
 707
 708                 case MetaActionType::BMPEX :
 709                 {
 710                     const MetaBmpExAction* pA = static_cast< const MetaBmpExAction* >(pAction);
 711                     const BitmapEx& rBitmapEx = pA->GetBitmapEx();
 712
 713                     // the logical size depends on the PrefSize of the given bitmap in
 714                     // combination with the current MapMode
 715                     Size aLogicalSize(rBitmapEx.GetPrefSize());
 716
 717                     if(MapUnit::MapPixel == rBitmapEx.GetPrefMapMode().GetMapUnit())
 718                     {
 719                         aLogicalSize = Application::GetDefaultDevice()->PixelToLogic(aLogicalSize, aMapModes.back());
 720                     }
 721                     else
 722                     {
 723                         aLogicalSize = OutputDevice::LogicToLogic(aLogicalSize, rBitmapEx.GetPrefMapMode(), aMapModes.back());
 724                     }
 725
 726                     bDone = handleBitmapContent(
 727                         aClips.back(),
 728                         pA->GetPoint(),
 729                         aLogicalSize,
 730                         rBitmapEx,
 731                         aTarget);
 732                     break;
 733                 }
 734
 735                 case MetaActionType::BMP :
 736                 {
 737                     const MetaBmpAction* pA = static_cast< const MetaBmpAction* >(pAction);
 738                     const Bitmap& rBitmap = pA->GetBitmap();
 739
 740                     // the logical size depends on the PrefSize of the given bitmap in
 741                     // combination with the current MapMode
 742                     Size aLogicalSize(rBitmap.GetPrefSize());
 743
 744                     if(MapUnit::MapPixel == rBitmap.GetPrefMapMode().GetMapUnit())
 745                     {
 746                         aLogicalSize = Application::GetDefaultDevice()->PixelToLogic(aLogicalSize, aMapModes.back());
 747                     }
 748                     else
 749                     {
 750                         aLogicalSize = OutputDevice::LogicToLogic(aLogicalSize, rBitmap.GetPrefMapMode(), aMapModes.back());
 751                     }
 752
 753                     bDone = handleBitmapContent(
 754                         aClips.back(),
 755                         pA->GetPoint(),
 756                         aLogicalSize,
 757                         BitmapEx(rBitmap),
 758                         aTarget);
 759                     break;
 760                 }
 761
 762                 case MetaActionType::BMPEXSCALE :
 763                 {
 764                     const MetaBmpExScaleAction* pA = static_cast< const MetaBmpExScaleAction* >(pAction);
 765
 766                     bDone = handleBitmapContent(
 767                         aClips.back(),
 768                         pA->GetPoint(),
 769                         pA->GetSize(),
 770                         pA->GetBitmapEx(),
 771                         aTarget);
 772                     break;
 773                 }
 774
 775                 case MetaActionType::BMPSCALE :
 776                 {
 777                     const MetaBmpScaleAction* pA = static_cast< const MetaBmpScaleAction* >(pAction);
 778
 779                     bDone = handleBitmapContent(
 780                         aClips.back(),
 781                         pA->GetPoint(),
 782                         pA->GetSize(),
 783                         BitmapEx(pA->GetBitmap()),
 784                         aTarget);
 785                     break;
 786                 }
 787
 788                 case MetaActionType::BMPEXSCALEPART :
 789                 {
 790                     const MetaBmpExScalePartAction* pA = static_cast< const MetaBmpExScalePartAction* >(pAction);
 791                     const BitmapEx& rBitmapEx = pA->GetBitmapEx();
 792
 793                     if(rBitmapEx.IsEmpty())
 794                     {
 795                         // empty content
 796                         bDone = true;
 797                     }
 798                     else
 799                     {
 800                         BitmapEx aCroppedBitmapEx(rBitmapEx);
 801                         const tools::Rectangle aCropRectangle(pA->GetSrcPoint(), pA->GetSrcSize());
 802
 803                         if(aCropRectangle.IsEmpty())
 804                         {
 805                             // empty content
 806                             bDone = true;
 807                         }
 808                         else
 809                         {
 810                             aCroppedBitmapEx.Crop(aCropRectangle);
 811                             bDone = handleBitmapContent(
 812                                 aClips.back(),
 813                                 pA->GetDestPoint(),
 814                                 pA->GetDestSize(),
 815                                 aCroppedBitmapEx,
 816                                 aTarget);
 817                         }
 818                     }
 819                     break;
 820                 }
 821
 822                 case MetaActionType::BMPSCALEPART :
 823                 {
 824                     const MetaBmpScalePartAction* pA = static_cast< const MetaBmpScalePartAction* >(pAction);
 825                     const Bitmap& rBitmap = pA->GetBitmap();
 826
 827                     if(rBitmap.IsEmpty())
 828                     {
 829                         // empty content
 830                         bDone = true;
 831                     }
 832                     else
 833                     {
 834                         Bitmap aCroppedBitmap(rBitmap);
 835                         const tools::Rectangle aCropRectangle(pA->GetSrcPoint(), pA->GetSrcSize());
 836
 837                         if(aCropRectangle.IsEmpty())
 838                         {
 839                             // empty content
 840                             bDone = true;
 841                         }
 842                         else
 843                         {
 844                             aCroppedBitmap.Crop(aCropRectangle);
 845                             bDone = handleBitmapContent(
 846                                 aClips.back(),
 847                                 pA->GetDestPoint(),
 848                                 pA->GetDestSize(),
 849                                 BitmapEx(aCroppedBitmap),
 850                                 aTarget);
 851                         }
 852                     }
 853                     break;
 854                 }
 855
 856                 // need to handle all those 'hacks' which hide data in comments
 857
 858                 case MetaActionType::COMMENT :
 859                 {
 860                     const MetaCommentAction* pA = static_cast< const MetaCommentAction* >(pAction);
 861                     const OString& rComment = pA->GetComment();
 862
 863                     if(rComment.equalsIgnoreAsciiCase("XGRAD_SEQ_BEGIN"))
 864                     {
 865                         // nothing to do; this just means that between here and XGRAD_SEQ_END
 866                         // exists a MetaActionType::GRADIENTEX mixed with Xor-tricked painting
 867                         // commands. This comment is used to scan over these and filter for
 868                         // the gradient action. It is needed to support MetaActionType::GRADIENTEX
 869                         // in this processor to solve usages.
 870                     }
 871                     else if(rComment.equalsIgnoreAsciiCase("XPATHFILL_SEQ_BEGIN"))
 872                     {
 873                         SvtGraphicFill aFilling;
 874                         tools::PolyPolygon aPath;
 875
 876                         {   // read SvtGraphicFill
 877                             SvMemoryStream aMemStm(const_cast<sal_uInt8 *>(pA->GetData()), pA->GetDataSize(),StreamMode::READ);
 878                             ReadSvtGraphicFill( aMemStm, aFilling );
 879                         }
 880
 881                         aFilling.getPath(aPath);
 882
 883                         if(aPath.Count())
 884                         {
 885                             const basegfx::B2DPolyPolygon aSource(aPath.getB2DPolyPolygon());
 886                             const basegfx::B2DPolyPolygon aResult(
 887                                 basegfx::utils::clipPolyPolygonOnPolyPolygon(
 888                                     aSource,
 889                                     aClips.back(),
 890                                     true, // inside
 891                                     false)); // stroke
 892
 893                             if(aResult.count())
 894                             {
 895                                 if(aResult != aSource)
 896                                 {
 897                                     // add clipped geometry
 898                                     aFilling.setPath(tools::PolyPolygon(aResult));
 899                                     addSvtGraphicFill(aFilling, aTarget);
 900                                     bDone = true;
 901                                 }
 902                             }
 903                             else
 904                             {
 905                                 // exchange with empty polygon
 906                                 aFilling.setPath(tools::PolyPolygon());
 907                                 addSvtGraphicFill(aFilling, aTarget);
 908                                 bDone = true;
 909                             }
 910                         }
 911                     }
 912                     else if(rComment.equalsIgnoreAsciiCase("XPATHSTROKE_SEQ_BEGIN"))
 913                     {
 914                         SvtGraphicStroke aStroke;
 915                         tools::Polygon aPath;
 916
 917                         {   // read SvtGraphicFill
 918                             SvMemoryStream aMemStm(const_cast<sal_uInt8 *>(pA->GetData()), pA->GetDataSize(),StreamMode::READ);
 919                             ReadSvtGraphicStroke( aMemStm, aStroke );
 920                         }
 921
 922                         aStroke.getPath(aPath);
 923
 924                         if(aPath.GetSize())
 925                         {
 926                             const basegfx::B2DPolygon aSource(aPath.getB2DPolygon());
 927                             const basegfx::B2DPolyPolygon aResult(
 928                                 basegfx::utils::clipPolygonOnPolyPolygon(
 929                                     aSource,
 930                                     aClips.back(),
 931                                     true, // inside
 932                                     true)); // stroke
 933
 934                             if(aResult.count())
 935                             {
 936                                 if(aResult.count() > 1 || aResult.getB2DPolygon(0) != aSource)
 937                                 {
 938                                     // add clipped geometry
 939                                     for(auto const& rB2DPolygon : aResult)
 940                                     {
 941                                         aStroke.setPath(tools::Polygon(rB2DPolygon));
 942                                         addSvtGraphicStroke(aStroke, aTarget);
 943                                     }
 944
 945                                     bDone = true;
 946                                 }
 947                             }
 948                             else
 949                             {
 950                                 // exchange with empty polygon
 951                                 aStroke.setPath(tools::Polygon());
 952                                 addSvtGraphicStroke(aStroke, aTarget);
 953                                 bDone = true;
 954                             }
 955
 956                         }
 957                     }
 958                     break;
 959                 }
 960
 961                 // need to handle gradient fills (hopefully only unrotated ones)
 962
 963                 case MetaActionType::GRADIENT :
 964                 {
 965                     const MetaGradientAction* pA = static_cast< const MetaGradientAction* >(pAction);
 966                     const tools::Rectangle& rRect = pA->GetRect();
 967
 968                     if(rRect.IsEmpty())
 969                     {
 970                         bDone = true;
 971                     }
 972                     else
 973                     {
 974                         bDone = handleGradientContent(
 975                             aClips.back(),
 976                             basegfx::B2DPolyPolygon(
 977                                 basegfx::utils::createPolygonFromRect(
 978                                         vcl::unotools::b2DRectangleFromRectangle(rRect))),
 979                             pA->GetGradient(),
 980                             aTarget);
 981                     }
 982
 983                     break;
 984                 }
 985
 986                 case MetaActionType::GRADIENTEX :
 987                 {
 988                     const MetaGradientExAction* pA = static_cast< const MetaGradientExAction* >(pAction);
 989                     const tools::PolyPolygon& rPolyPoly = pA->GetPolyPolygon();
 990
 991                     bDone = handleGradientContent(
 992                         aClips.back(),
 993                         rPolyPoly.getB2DPolyPolygon(),
 994                         pA->GetGradient(),
 995                         aTarget);
 996                     break;
 997                 }
 998
 999                 // not (yet) supported actions
1000
1001                 // MetaActionType::NONE
1002                 // MetaActionType::TEXT
1003                 // MetaActionType::TEXTARRAY
1004                 // MetaActionType::STRETCHTEXT
1005                 // MetaActionType::TEXTRECT
1006                 // MetaActionType::MASK
1007                 // MetaActionType::MASKSCALE
1008                 // MetaActionType::MASKSCALEPART
1009                 // MetaActionType::HATCH
1010                 // MetaActionType::WALLPAPER
1011                 // MetaActionType::FILLCOLOR
1012                 // MetaActionType::TEXTCOLOR
1013                 // MetaActionType::TEXTFILLCOLOR
1014                 // MetaActionType::TEXTALIGN
1015                 // MetaActionType::MAPMODE
1016                 // MetaActionType::FONT
1017                 // MetaActionType::Transparent
1018                 // MetaActionType::EPS
1019                 // MetaActionType::REFPOINT
1020                 // MetaActionType::TEXTLINECOLOR
1021                 // MetaActionType::TEXTLINE
1022                 // MetaActionType::FLOATTRANSPARENT
1023                 // MetaActionType::LAYOUTMODE
1024                 // MetaActionType::TEXTLANGUAGE
1025                 // MetaActionType::OVERLINECOLOR
1026
1027                 // if an action is not handled at all, it will simply get copied to the
1028                 // target (see below). This is the default for all non-implemented actions
1029                 default:
1030                 {
1031                     break;
1032                 }
1033             }
1034         }
1035
1036         if(bDone)
1037         {
1038             bChanged = true;
1039         }
1040         else
1041         {
1042             aTarget.AddAction(const_cast< MetaAction* >(pAction));
1043         }
1044     }
1045
1046     if(bChanged)
1047     {
1048         // when changed, copy back and do not forget to set MapMode
1049         // and PrefSize
1050         aTarget.SetPrefMapMode(rSource.GetPrefMapMode());
1051         aTarget.SetPrefSize(rSource.GetPrefSize());
1052         rSource = aTarget;
1053     }
1054 }
1055
1056 bool usesClipActions(const GDIMetaFile& rSource)
1057 {
1058     const sal_uLong nObjCount(rSource.GetActionSize());
1059
1060     for(sal_uLong i(0); i < nObjCount; ++i)
1061     {
1062         const MetaAction* pAction(rSource.GetAction(i));
1063         const MetaActionType nType(pAction->GetType());
1064
1065         switch(nType)
1066         {
1067             case MetaActionType::CLIPREGION :
1068             case MetaActionType::ISECTRECTCLIPREGION :
1069             case MetaActionType::ISECTREGIONCLIPREGION :
1070             case MetaActionType::MOVECLIPREGION :
1071             {
1072                 return true;
1073             }
1074
1075             default: break;
1076         }
1077     }
1078
1079     return false;
1080 }
1081
1082 MetafileAccessor::~MetafileAccessor()
1083 {
1084 }
1085
1086 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */