drawinglayer/source/processor3d/zbufferprocessor3d.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  19
  20 #include <processor3d/zbufferprocessor3d.hxx>
  21 #include <basegfx/raster/bzpixelraster.hxx>
  22 #include <basegfx/raster/rasterconvert3d.hxx>
  23 #include <drawinglayer/attribute/materialattribute3d.hxx>
  24 #include <texture/texture.hxx>
  25 #include <basegfx/polygon/b3dpolygon.hxx>
  26 #include <basegfx/polygon/b3dpolypolygon.hxx>
  27 #include <basegfx/polygon/b3dpolygontools.hxx>
  28 #include <basegfx/polygon/b3dpolypolygontools.hxx>
  29 #include <drawinglayer/attribute/sdrlightingattribute3d.hxx>
  30 #include <o3tl/safeint.hxx>
  31 #include <svtools/optionsdrawinglayer.hxx>
  32 #include <utility>
  33
  34 using namespace com::sun::star;
  35
  36 class ZBufferRasterConverter3D : public basegfx::RasterConverter3D
  37 {
  38 private:
  39     const drawinglayer::processor3d::DefaultProcessor3D&    mrProcessor;
  40     basegfx::BZPixelRaster&                                 mrBuffer;
  41
  42     // interpolators for a single line span
  43     basegfx::ip_single                                      maIntZ;
  44     basegfx::ip_triple                                      maIntColor;
  45     basegfx::ip_triple                                      maIntNormal;
  46     basegfx::ip_double                                      maIntTexture;
  47     basegfx::ip_triple                                      maIntInvTexture;
  48
  49     // current material to use for rasterconversion
  50     const drawinglayer::attribute::MaterialAttribute3D*     mpCurrentMaterial;
  51
  52     // some boolean flags for line span interpolator usages
  53     bool                                                    mbModifyColor : 1;
  54     bool                                                    mbUseTex : 1;
  55     bool                                                    mbHasTexCoor : 1;
  56     bool                                                    mbHasInvTexCoor : 1;
  57     bool                                                    mbUseNrm : 1;
  58     bool                                                    mbUseCol : 1;
  59
  60     void getTextureCoor(basegfx::B2DPoint& rTarget) const
  61     {
  62         if(mbHasTexCoor)
  63         {
  64             rTarget.setX(maIntTexture.getX().getVal());
  65             rTarget.setY(maIntTexture.getY().getVal());
  66         }
  67         else if(mbHasInvTexCoor)
  68         {
  69             const double fZFactor(maIntInvTexture.getZ().getVal());
  70             const double fInvZFactor(basegfx::fTools::equalZero(fZFactor) ? 1.0 : 1.0 / fZFactor);
  71             rTarget.setX(maIntInvTexture.getX().getVal() * fInvZFactor);
  72             rTarget.setY(maIntInvTexture.getY().getVal() * fInvZFactor);
  73         }
  74     }
  75
  76     void incrementLineSpanInterpolators(double fStep)
  77     {
  78         maIntZ.increment(fStep);
  79
  80         if(mbUseTex)
  81         {
  82             if(mbHasTexCoor)
  83             {
  84                 maIntTexture.increment(fStep);
  85             }
  86             else if(mbHasInvTexCoor)
  87             {
  88                 maIntInvTexture.increment(fStep);
  89             }
  90         }
  91
  92         if(mbUseNrm)
  93         {
  94             maIntNormal.increment(fStep);
  95         }
  96
  97         if(mbUseCol)
  98         {
  99             maIntColor.increment(fStep);
 100         }
 101     }
 102
 103     double decideColorAndOpacity(basegfx::BColor& rColor) const
 104     {
 105         // init values with full opacity and material color
 106         assert(nullptr != mpCurrentMaterial && "CurrentMaterial not set (!)");
 107         double fOpacity(1.0);
 108         rColor = mpCurrentMaterial->getColor();
 109
 110         if(mbUseTex)
 111         {
 112             basegfx::B2DPoint aTexCoor(0.0, 0.0);
 113             getTextureCoor(aTexCoor);
 114
 115             if(mrProcessor.getGeoTexSvx())
 116             {
 117                 // calc color in spot. This may also set to invisible already when
 118                 // e.g. bitmap textures have transparent parts
 119                 mrProcessor.getGeoTexSvx()->modifyBColor(aTexCoor, rColor, fOpacity);
 120             }
 121
 122             if (fOpacity > 0.0 && !basegfx::fTools::equalZero(fOpacity) && mrProcessor.getTransparenceGeoTexSvx())
 123             {
 124                 // calc opacity. Object has a 2nd texture, a transparence texture
 125                 mrProcessor.getTransparenceGeoTexSvx()->modifyOpacity(aTexCoor, fOpacity);
 126             }
 127         }
 128
 129         if (fOpacity > 0.0 && !basegfx::fTools::equalZero(fOpacity))
 130         {
 131             if(mrProcessor.getGeoTexSvx())
 132             {
 133                 if(mbUseNrm)
 134                 {
 135                     // blend texture with phong
 136                     rColor = mrProcessor.getSdrLightingAttribute().solveColorModel(
 137                         basegfx::B3DVector(maIntNormal.getX().getVal(), maIntNormal.getY().getVal(), maIntNormal.getZ().getVal()),
 138                         rColor,
 139                         mpCurrentMaterial->getSpecular(),
 140                         mpCurrentMaterial->getEmission(),
 141                         mpCurrentMaterial->getSpecularIntensity());
 142                 }
 143                 else if(mbUseCol)
 144                 {
 145                     // blend texture with gouraud
 146                     basegfx::BColor aBlendColor(maIntColor.getX().getVal(), maIntColor.getY().getVal(), maIntColor.getZ().getVal());
 147                     rColor *= aBlendColor;
 148                 }
 149                 else if(mrProcessor.getModulate())
 150                 {
 151                     // blend texture with single material color
 152                     rColor *= mpCurrentMaterial->getColor();
 153                 }
 154             }
 155             else
 156             {
 157                 if(mbUseNrm)
 158                 {
 159                     // modify color with phong
 160                     rColor = mrProcessor.getSdrLightingAttribute().solveColorModel(
 161                         basegfx::B3DVector(maIntNormal.getX().getVal(), maIntNormal.getY().getVal(), maIntNormal.getZ().getVal()),
 162                         rColor,
 163                         mpCurrentMaterial->getSpecular(),
 164                         mpCurrentMaterial->getEmission(),
 165                         mpCurrentMaterial->getSpecularIntensity());
 166                 }
 167                 else if(mbUseCol)
 168                 {
 169                     // modify color with gouraud
 170                     rColor.setRed(maIntColor.getX().getVal());
 171                     rColor.setGreen(maIntColor.getY().getVal());
 172                     rColor.setBlue(maIntColor.getZ().getVal());
 173                 }
 174             }
 175
 176             if(mbModifyColor)
 177             {
 178                 rColor = mrProcessor.getBColorModifierStack().getModifiedColor(rColor);
 179             }
 180         }
 181
 182         return fOpacity;
 183     }
 184
 185     void setupLineSpanInterpolators(const basegfx::RasterConversionLineEntry3D& rA, const basegfx::RasterConversionLineEntry3D& rB)
 186     {
 187         // get inverse XDelta
 188         const double xInvDelta(1.0 / (rB.getX().getVal() - rA.getX().getVal()));
 189
 190         // prepare Z-interpolator
 191         const double fZA(rA.getZ().getVal());
 192         const double fZB(rB.getZ().getVal());
 193         maIntZ = basegfx::ip_single(fZA, (fZB - fZA) * xInvDelta);
 194
 195         // get bools and init other interpolators on demand accordingly
 196         mbModifyColor = mrProcessor.getBColorModifierStack().count();
 197         mbHasTexCoor = SCANLINE_EMPTY_INDEX != rA.getTextureIndex() && SCANLINE_EMPTY_INDEX != rB.getTextureIndex();
 198         mbHasInvTexCoor = SCANLINE_EMPTY_INDEX != rA.getInverseTextureIndex() && SCANLINE_EMPTY_INDEX != rB.getInverseTextureIndex();
 199         const bool bTextureActive(mrProcessor.getGeoTexSvx() || mrProcessor.getTransparenceGeoTexSvx());
 200         mbUseTex = bTextureActive && (mbHasTexCoor || mbHasInvTexCoor || mrProcessor.getSimpleTextureActive());
 201         const bool bUseColorTex(mbUseTex && mrProcessor.getGeoTexSvx());
 202         const bool bNeedNrmOrCol(!bUseColorTex || mrProcessor.getModulate());
 203         mbUseNrm = bNeedNrmOrCol && SCANLINE_EMPTY_INDEX != rA.getNormalIndex() && SCANLINE_EMPTY_INDEX != rB.getNormalIndex();
 204         mbUseCol = !mbUseNrm && bNeedNrmOrCol && SCANLINE_EMPTY_INDEX != rA.getColorIndex() && SCANLINE_EMPTY_INDEX != rB.getColorIndex();
 205
 206         if(mbUseTex)
 207         {
 208             if(mbHasTexCoor)
 209             {
 210                 const basegfx::ip_double& rTA(getTextureInterpolators()[rA.getTextureIndex()]);
 211                 const basegfx::ip_double& rTB(getTextureInterpolators()[rB.getTextureIndex()]);
 212                 maIntTexture = basegfx::ip_double(
 213                     rTA.getX().getVal(), (rTB.getX().getVal() - rTA.getX().getVal()) * xInvDelta,
 214                     rTA.getY().getVal(), (rTB.getY().getVal() - rTA.getY().getVal()) * xInvDelta);
 215             }
 216             else if(mbHasInvTexCoor)
 217             {
 218                 const basegfx::ip_triple& rITA(getInverseTextureInterpolators()[rA.getInverseTextureIndex()]);
 219                 const basegfx::ip_triple& rITB(getInverseTextureInterpolators()[rB.getInverseTextureIndex()]);
 220                 maIntInvTexture = basegfx::ip_triple(
 221                     rITA.getX().getVal(), (rITB.getX().getVal() - rITA.getX().getVal()) * xInvDelta,
 222                     rITA.getY().getVal(), (rITB.getY().getVal() - rITA.getY().getVal()) * xInvDelta,
 223                     rITA.getZ().getVal(), (rITB.getZ().getVal() - rITA.getZ().getVal()) * xInvDelta);
 224             }
 225         }
 226
 227         if(mbUseNrm)
 228         {
 229             const basegfx::ip_triple& rNA(getNormalInterpolators()[rA.getNormalIndex()]);
 230             const basegfx::ip_triple& rNB(getNormalInterpolators()[rB.getNormalIndex()]);
 231             maIntNormal = basegfx::ip_triple(
 232                 rNA.getX().getVal(), (rNB.getX().getVal() - rNA.getX().getVal()) * xInvDelta,
 233                 rNA.getY().getVal(), (rNB.getY().getVal() - rNA.getY().getVal()) * xInvDelta,
 234                 rNA.getZ().getVal(), (rNB.getZ().getVal() - rNA.getZ().getVal()) * xInvDelta);
 235         }
 236
 237         if(mbUseCol)
 238         {
 239             const basegfx::ip_triple& rCA(getColorInterpolators()[rA.getColorIndex()]);
 240             const basegfx::ip_triple& rCB(getColorInterpolators()[rB.getColorIndex()]);
 241             maIntColor = basegfx::ip_triple(
 242                 rCA.getX().getVal(), (rCB.getX().getVal() - rCA.getX().getVal()) * xInvDelta,
 243                 rCA.getY().getVal(), (rCB.getY().getVal() - rCA.getY().getVal()) * xInvDelta,
 244                 rCA.getZ().getVal(), (rCB.getZ().getVal() - rCA.getZ().getVal()) * xInvDelta);
 245         }
 246     }
 247
 248     virtual void processLineSpan(const basegfx::RasterConversionLineEntry3D& rA, const basegfx::RasterConversionLineEntry3D& rB, sal_Int32 nLine, sal_uInt32 nSpanCount) override;
 249
 250 public:
 251     ZBufferRasterConverter3D(basegfx::BZPixelRaster& rBuffer, const drawinglayer::processor3d::ZBufferProcessor3D& rProcessor)
 252     :   mrProcessor(rProcessor),
 253         mrBuffer(rBuffer),
 254         mpCurrentMaterial(nullptr),
 255         mbModifyColor(false),
 256         mbUseTex(false),
 257         mbHasTexCoor(false),
 258         mbHasInvTexCoor(false),
 259         mbUseNrm(false),
 260         mbUseCol(false)
 261     {}
 262
 263     void setCurrentMaterial(const drawinglayer::attribute::MaterialAttribute3D& rMaterial)
 264     {
 265         mpCurrentMaterial = &rMaterial;
 266     }
 267 };
 268
 269 void ZBufferRasterConverter3D::processLineSpan(const basegfx::RasterConversionLineEntry3D& rA, const basegfx::RasterConversionLineEntry3D& rB, sal_Int32 nLine, sal_uInt32 nSpanCount)
 270 {
 271     if(nSpanCount & 0x0001)
 272         return;
 273
 274     if(nLine < 0 || o3tl::make_unsigned(nLine) >= mrBuffer.getHeight())
 275         return;
 276
 277     sal_uInt32 nXA(std::min(mrBuffer.getWidth(), static_cast<sal_uInt32>(std::max(sal_Int32(0), basegfx::fround(rA.getX().getVal())))));
 278     const sal_uInt32 nXB(std::min(mrBuffer.getWidth(), static_cast<sal_uInt32>(std::max(sal_Int32(0), basegfx::fround(rB.getX().getVal())))));
 279
 280     if(nXA >= nXB)
 281         return;
 282
 283     // prepare the span interpolators
 284     setupLineSpanInterpolators(rA, rB);
 285
 286     // bring span interpolators to start condition by incrementing with the possible difference of
 287     // clamped and non-clamped XStart. Interpolators are setup relying on double precision
 288     // X-values, so that difference is the correct value to compensate for possible clampings
 289     incrementLineSpanInterpolators(static_cast<double>(nXA) - rA.getX().getVal());
 290
 291     // prepare scanline index
 292     sal_uInt32 nScanlineIndex(mrBuffer.getIndexFromXY(nXA, static_cast<sal_uInt32>(nLine)));
 293     basegfx::BColor aNewColor;
 294
 295     while(nXA < nXB)
 296     {
 297         // early-test Z values if we need to do anything at all
 298         const double fNewZ(std::clamp(maIntZ.getVal(), 0.0, 65535.0));
 299         const sal_uInt16 nNewZ(static_cast< sal_uInt16 >(fNewZ));
 300         sal_uInt16& rOldZ(mrBuffer.getZ(nScanlineIndex));
 301
 302         if(nNewZ > rOldZ)
 303         {
 304             // detect color and opacity for this pixel
 305             const sal_uInt16 nOpacity(std::max(sal_Int16(0), static_cast< sal_Int16 >(decideColorAndOpacity(aNewColor) * 255.0)));
 306
 307             if(nOpacity > 0)
 308             {
 309                 // avoid color overrun
 310                 aNewColor.clamp();
 311
 312                 if(nOpacity >= 0x00ff)
 313                 {
 314                     // full opacity (not transparent), set z and color
 315                     rOldZ = nNewZ;
 316                     mrBuffer.getBPixel(nScanlineIndex) = basegfx::BPixel(aNewColor, 0xff);
 317                 }
 318                 else
 319                 {
 320                     basegfx::BPixel& rDest = mrBuffer.getBPixel(nScanlineIndex);
 321
 322                     if(rDest.getAlpha())
 323                     {
 324                         // mix new color by using
 325                         // color' = color * (1 - opacity) + newcolor * opacity
 326                         const sal_uInt16 nTransparence(255 - nOpacity);
 327                         rDest.setRed(static_cast<sal_uInt8>(((rDest.getRed() * nTransparence) + (static_cast<sal_uInt16>(255.0 * aNewColor.getRed()) * nOpacity)) >> 8));
 328                         rDest.setGreen(static_cast<sal_uInt8>(((rDest.getGreen() * nTransparence) + (static_cast<sal_uInt16>(255.0 * aNewColor.getGreen()) * nOpacity)) >> 8));
 329                         rDest.setBlue(static_cast<sal_uInt8>(((rDest.getBlue() * nTransparence) + (static_cast<sal_uInt16>(255.0 * aNewColor.getBlue()) * nOpacity)) >> 8));
 330
 331                         if(255 != rDest.getAlpha())
 332                         {
 333                             // both are transparent, mix new opacity by using
 334                             // opacity = newopacity * (1 - oldopacity) + oldopacity
 335                             rDest.setAlpha(static_cast<sal_uInt8>((nOpacity * (255 - rDest.getAlpha())) >> 8) + rDest.getAlpha());
 336                         }
 337                     }
 338                     else
 339                     {
 340                         // dest is unused, set color
 341                         rDest = basegfx::BPixel(aNewColor, static_cast<sal_uInt8>(nOpacity));
 342                     }
 343                 }
 344             }
 345         }
 346
 347         // increments
 348         nScanlineIndex++;
 349         nXA++;
 350         incrementLineSpanInterpolators(1.0);
 351     }
 352 }
 353
 354 // helper class to buffer output for transparent rasterprimitives (filled areas
 355 // and lines) until the end of processing. To ensure correct transparent
 356 // visualisation, ZBuffers require to not set Z and to mix with the transparent
 357 // color. If transparent rasterprimitives overlap, it gets necessary to
 358 // paint transparent rasterprimitives from back to front to ensure that the
 359 // mixing happens from back to front. For that purpose, transparent
 360 // rasterprimitives are held in this class during the processing run, remember
 361 // all data and will be rendered
 362
 363 class RasterPrimitive3D
 364 {
 365 private:
 366     std::shared_ptr< drawinglayer::texture::GeoTexSvx >     mpGeoTexSvx;
 367     std::shared_ptr< drawinglayer::texture::GeoTexSvx >     mpTransparenceGeoTexSvx;
 368     drawinglayer::attribute::MaterialAttribute3D              maMaterial;
 369     basegfx::B3DPolyPolygon                                   maPolyPolygon;
 370     double                                                    mfCenterZ;
 371
 372     bool                                                      mbModulate : 1;
 373     bool                                                      mbFilter : 1;
 374     bool                                                      mbSimpleTextureActive : 1;
 375     bool                                                      mbIsLine : 1;
 376
 377 public:
 378     RasterPrimitive3D(
 379         std::shared_ptr< drawinglayer::texture::GeoTexSvx > pGeoTexSvx,
 380         std::shared_ptr< drawinglayer::texture::GeoTexSvx > pTransparenceGeoTexSvx,
 381         const drawinglayer::attribute::MaterialAttribute3D& rMaterial,
 382         const basegfx::B3DPolyPolygon& rPolyPolygon,
 383         bool bModulate,
 384         bool bFilter,
 385         bool bSimpleTextureActive,
 386         bool bIsLine)
 387     :   mpGeoTexSvx(std::move(pGeoTexSvx)),
 388         mpTransparenceGeoTexSvx(std::move(pTransparenceGeoTexSvx)),
 389         maMaterial(rMaterial),
 390         maPolyPolygon(rPolyPolygon),
 391         mfCenterZ(basegfx::utils::getRange(rPolyPolygon).getCenter().getZ()),
 392         mbModulate(bModulate),
 393         mbFilter(bFilter),
 394         mbSimpleTextureActive(bSimpleTextureActive),
 395         mbIsLine(bIsLine)
 396     {
 397     }
 398
 399     bool operator<(const RasterPrimitive3D& rComp) const
 400     {
 401         return mfCenterZ < rComp.mfCenterZ;
 402     }
 403
 404     const std::shared_ptr< drawinglayer::texture::GeoTexSvx >& getGeoTexSvx() const { return mpGeoTexSvx; }
 405     const std::shared_ptr< drawinglayer::texture::GeoTexSvx >& getTransparenceGeoTexSvx() const { return mpTransparenceGeoTexSvx; }
 406     const drawinglayer::attribute::MaterialAttribute3D& getMaterial() const { return maMaterial; }
 407     const basegfx::B3DPolyPolygon& getPolyPolygon() const { return maPolyPolygon; }
 408     bool getModulate() const { return mbModulate; }
 409     bool getFilter() const { return mbFilter; }
 410     bool getSimpleTextureActive() const { return mbSimpleTextureActive; }
 411     bool getIsLine() const { return mbIsLine; }
 412 };
 413
 414 namespace drawinglayer::processor3d
 415 {
 416         void ZBufferProcessor3D::rasterconvertB3DPolygon(const attribute::MaterialAttribute3D& rMaterial, const basegfx::B3DPolygon& rHairline) const
 417         {
 418             if(getTransparenceCounter())
 419             {
 420                 // transparent output; record for later sorting and painting from
 421                 // back to front
 422
 423                 maRasterPrimitive3Ds.push_back(RasterPrimitive3D(
 424                     getGeoTexSvx(),
 425                     getTransparenceGeoTexSvx(),
 426                     rMaterial,
 427                     basegfx::B3DPolyPolygon(rHairline),
 428                     getModulate(),
 429                     getFilter(),
 430                     getSimpleTextureActive(),
 431                     true));
 432             }
 433             else
 434             {
 435                 // do rasterconversion
 436                 mpZBufferRasterConverter3D->setCurrentMaterial(rMaterial);
 437
 438                 if(mnAntiAlialize > 1)
 439                 {
 440                     const bool bForceLineSnap(SvtOptionsDrawinglayer::IsAntiAliasing() && SvtOptionsDrawinglayer::IsSnapHorVerLinesToDiscrete());
 441
 442                     if(bForceLineSnap)
 443                     {
 444                         basegfx::B3DHomMatrix aTransform;
 445                         basegfx::B3DPolygon aSnappedHairline(rHairline);
 446                         const double fScaleDown(1.0 / mnAntiAlialize);
 447                         const double fScaleUp(mnAntiAlialize);
 448
 449                         // take oversampling out
 450                         aTransform.scale(fScaleDown, fScaleDown, 1.0);
 451                         aSnappedHairline.transform(aTransform);
 452
 453                         // snap to integer
 454                         aSnappedHairline = basegfx::utils::snapPointsOfHorizontalOrVerticalEdges(aSnappedHairline);
 455
 456                         // add oversampling again
 457                         aTransform.identity();
 458                         aTransform.scale(fScaleUp, fScaleUp, 1.0);
 459
 460                         aSnappedHairline.transform(aTransform);
 461
 462                         mpZBufferRasterConverter3D->rasterconvertB3DPolygon(aSnappedHairline, mnStartLine, mnStopLine, mnAntiAlialize);
 463                     }
 464                     else
 465                     {
 466                         mpZBufferRasterConverter3D->rasterconvertB3DPolygon(rHairline, mnStartLine, mnStopLine, mnAntiAlialize);
 467                     }
 468                 }
 469                 else
 470                 {
 471                     mpZBufferRasterConverter3D->rasterconvertB3DPolygon(rHairline, mnStartLine, mnStopLine, 1);
 472                 }
 473             }
 474         }
 475
 476         void ZBufferProcessor3D::rasterconvertB3DPolyPolygon(const attribute::MaterialAttribute3D& rMaterial, const basegfx::B3DPolyPolygon& rFill) const
 477         {
 478             if(getTransparenceCounter())
 479             {
 480                 // transparent output; record for later sorting and painting from
 481                 // back to front
 482                 maRasterPrimitive3Ds.push_back(RasterPrimitive3D(
 483                     getGeoTexSvx(),
 484                     getTransparenceGeoTexSvx(),
 485                     rMaterial,
 486                     rFill,
 487                     getModulate(),
 488                     getFilter(),
 489                     getSimpleTextureActive(),
 490                     false));
 491             }
 492             else
 493             {
 494                 mpZBufferRasterConverter3D->setCurrentMaterial(rMaterial);
 495                 mpZBufferRasterConverter3D->rasterconvertB3DPolyPolygon(rFill, &maInvEyeToView, mnStartLine, mnStopLine);
 496             }
 497         }
 498
 499         ZBufferProcessor3D::ZBufferProcessor3D(
 500             const geometry::ViewInformation3D& rViewInformation3D,
 501             const attribute::SdrSceneAttribute& rSdrSceneAttribute,
 502             const attribute::SdrLightingAttribute& rSdrLightingAttribute,
 503             const basegfx::B2DRange& rVisiblePart,
 504             sal_uInt16 nAntiAlialize,
 505             double fFullViewSizeX,
 506             double fFullViewSizeY,
 507             basegfx::BZPixelRaster& rBZPixelRaster,
 508             sal_uInt32 nStartLine,
 509             sal_uInt32 nStopLine)
 510         :   DefaultProcessor3D(rViewInformation3D, rSdrSceneAttribute, rSdrLightingAttribute),
 511             mnAntiAlialize(nAntiAlialize),
 512             mnStartLine(nStartLine),
 513             mnStopLine(nStopLine)
 514         {
 515             // create DeviceToView for Z-Buffer renderer since Z is handled
 516             // different from standard 3D transformations (Z is mirrored). Also
 517             // the transformation includes the step from unit device coordinates
 518             // to discrete units ([-1.0 .. 1.0] -> [minDiscrete .. maxDiscrete]
 519             basegfx::B3DHomMatrix aDeviceToView;
 520
 521             {
 522                 // step one:
 523                 //
 524                 // bring from [-1.0 .. 1.0] in X,Y and Z to [0.0 .. 1.0]. Also
 525                 // necessary to
 526                 // - flip Y due to screen orientation
 527                 // - flip Z due to Z-Buffer orientation from back to front
 528
 529                 aDeviceToView.scale(0.5, -0.5, -0.5);
 530                 aDeviceToView.translate(0.5, 0.5, 0.5);
 531             }
 532
 533             {
 534                 // step two:
 535                 //
 536                 // bring from [0.0 .. 1.0] in X,Y and Z to view coordinates
 537                 //
 538                 // #i102611#
 539                 // also: scale Z to [1.5 .. 65534.5]. Normally, a range of [0.0 .. 65535.0]
 540                 // could be used, but a 'unused' value is needed, so '0' is used what reduces
 541                 // the range to [1.0 .. 65535.0]. It has also shown that small numerical errors
 542                 // (smaller as basegfx::fTools::mfSmallValue, which is 0.000000001) happen.
 543                 // Instead of checking those by basegfx::fTools methods which would cost
 544                 // runtime, just add another 0.5 tolerance to the start and end of the Z-Buffer
 545                 // range, thus resulting in [1.5 .. 65534.5]
 546                 const double fMaxZDepth(65533.0);
 547                 aDeviceToView.translate(-rVisiblePart.getMinX(), -rVisiblePart.getMinY(), 0.0);
 548
 549                 if(mnAntiAlialize)
 550                     aDeviceToView.scale(fFullViewSizeX * mnAntiAlialize, fFullViewSizeY * mnAntiAlialize, fMaxZDepth);
 551                 else
 552                     aDeviceToView.scale(fFullViewSizeX, fFullViewSizeY, fMaxZDepth);
 553
 554                 aDeviceToView.translate(0.0, 0.0, 1.5);
 555             }
 556
 557             // update local ViewInformation3D with own DeviceToView
 558             const geometry::ViewInformation3D aNewViewInformation3D(
 559                 getViewInformation3D().getObjectTransformation(),
 560                 getViewInformation3D().getOrientation(),
 561                 getViewInformation3D().getProjection(),
 562                 aDeviceToView,
 563                 getViewInformation3D().getViewTime(),
 564                 getViewInformation3D().getExtendedInformationSequence());
 565             updateViewInformation(aNewViewInformation3D);
 566
 567             // prepare inverse EyeToView transformation. This can be done in constructor
 568             // since changes in object transformations when processing TransformPrimitive3Ds
 569             // do not influence this prepared partial transformation
 570             maInvEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 571             maInvEyeToView.invert();
 572
 573             // prepare maRasterRange
 574             maRasterRange.reset();
 575             maRasterRange.expand(basegfx::B2DPoint(0.0, nStartLine));
 576             maRasterRange.expand(basegfx::B2DPoint(rBZPixelRaster.getWidth(), nStopLine));
 577
 578             // create the raster converter
 579             mpZBufferRasterConverter3D.reset( new ZBufferRasterConverter3D(rBZPixelRaster, *this) );
 580         }
 581
 582         ZBufferProcessor3D::~ZBufferProcessor3D()
 583         {
 584             mpZBufferRasterConverter3D.reset();
 585
 586             if(!maRasterPrimitive3Ds.empty())
 587             {
 588                 OSL_FAIL("ZBufferProcessor3D: destructed, but there are unrendered transparent geometries. Use ZBufferProcessor3D::finish() to render these (!)");
 589             }
 590         }
 591
 592         void ZBufferProcessor3D::finish()
 593         {
 594             if(maRasterPrimitive3Ds.empty())
 595                 return;
 596
 597             // there are transparent rasterprimitives
 598             const sal_uInt32 nSize(maRasterPrimitive3Ds.size());
 599
 600             if(nSize > 1)
 601             {
 602                 // sort them from back to front
 603                 std::sort(maRasterPrimitive3Ds.begin(), maRasterPrimitive3Ds.end());
 604             }
 605
 606             for(sal_uInt32 a(0); a < nSize; a++)
 607             {
 608                 // paint each one by setting the remembered data and calling
 609                 // the render method
 610                 const RasterPrimitive3D& rCandidate = maRasterPrimitive3Ds[a];
 611
 612                 mpGeoTexSvx = rCandidate.getGeoTexSvx();
 613                 mpTransparenceGeoTexSvx = rCandidate.getTransparenceGeoTexSvx();
 614                 mbModulate = rCandidate.getModulate();
 615                 mbFilter = rCandidate.getFilter();
 616                 mbSimpleTextureActive = rCandidate.getSimpleTextureActive();
 617
 618                 if(rCandidate.getIsLine())
 619                 {
 620                     rasterconvertB3DPolygon(
 621                         rCandidate.getMaterial(),
 622                         rCandidate.getPolyPolygon().getB3DPolygon(0));
 623                 }
 624                 else
 625                 {
 626                     rasterconvertB3DPolyPolygon(
 627                         rCandidate.getMaterial(),
 628                         rCandidate.getPolyPolygon());
 629                 }
 630             }
 631
 632             // delete them to signal the destructor that all is done and
 633             // to allow asserting there
 634             maRasterPrimitive3Ds.clear();
 635         }
 636
 637 } // end of namespace
 638
 639 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */