Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

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

1 files changed, 339 insertions, 0 deletions

diff --git a/basegfx/source/raster/rasterconvert3d.cxx b/basegfx/source/raster/rasterconvert3d.cxx
new file mode 100644
index 000000000..48a5c7bb5
--- /dev/null
+++ b/basegfx/source/raster/rasterconvert3d.cxx
@@ -0,0 +1,339 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <basegfx/raster/rasterconvert3d.hxx>
+#include <basegfx/vector/b2dvector.hxx>
+#include <basegfx/polygon/b3dpolygon.hxx>
+#include <basegfx/polygon/b3dpolypolygon.hxx>
+#include <basegfx/point/b3dpoint.hxx>
+
+// implementations of the 3D raster converter
+
+namespace basegfx
+{
+    void RasterConverter3D::addArea(const B3DPolygon& rFill, const B3DHomMatrix* pViewToEye)
+    {
+        const sal_uInt32 nPointCount(rFill.count());
+
+        for(sal_uInt32 a(0); a < nPointCount; a++)
+        {
+            addEdge(rFill, a, (a + 1) % nPointCount, pViewToEye);
+        }
+    }
+
+    void RasterConverter3D::addArea(const B3DPolyPolygon& rFill, const B3DHomMatrix* pViewToEye)
+    {
+        const sal_uInt32 nPolyCount(rFill.count());
+
+        for(sal_uInt32 a(0); a < nPolyCount; a++)
+        {
+            addArea(rFill.getB3DPolygon(a), pViewToEye);
+        }
+    }
+
+    RasterConverter3D::RasterConverter3D()
+    :   InterpolatorProvider3D(),
+        maLineEntries()
+    {}
+
+    RasterConverter3D::~RasterConverter3D()
+    {}
+
+    void RasterConverter3D::rasterconvertB3DArea(sal_Int32 nStartLine, sal_Int32 nStopLine)
+    {
+        if(maLineEntries.empty())
+            return;
+
+        OSL_ENSURE(nStopLine >= nStartLine, "nStopLine is bigger than nStartLine (!)");
+
+        // sort global entries by Y, X once. After this, the vector
+        // is seen as frozen. Pointers to its entries will be used in the following code.
+        std::sort(maLineEntries.begin(), maLineEntries.end());
+
+        // local parameters
+        std::vector< RasterConversionLineEntry3D >::iterator aCurrentEntry(maLineEntries.begin());
+        std::vector< RasterConversionLineEntry3D* > aCurrentLine;
+        std::vector< RasterConversionLineEntry3D* > aNextLine;
+        std::vector< RasterConversionLineEntry3D* >::iterator aRasterConversionLineEntry3D;
+
+        // get scanlines first LineNumber as start
+        sal_Int32 nLineNumber(std::max(aCurrentEntry->getY(), nStartLine));
+
+        while((!aCurrentLine.empty() || aCurrentEntry != maLineEntries.end()) && (nLineNumber < nStopLine))
+        {
+            // add all entries which start at current line to current scanline
+            while(aCurrentEntry != maLineEntries.end())
+            {
+                const sal_Int32 nCurrentLineNumber(aCurrentEntry->getY());
+
+                if(nCurrentLineNumber > nLineNumber)
+                {
+                    // line is below current one, done (since array is sorted)
+                    break;
+                }
+                else
+                {
+                    // less or equal. Line is above or at current one. Advance it exactly to
+                    // current line
+                    const sal_uInt32 nStep(nLineNumber - nCurrentLineNumber);
+
+                    if(!nStep || aCurrentEntry->decrementRasterConversionLineEntry3D(nStep))
+                    {
+                        // add when exactly on current line or when increment to it did not
+                        // completely consume it
+                        if(nStep)
+                        {
+                            aCurrentEntry->incrementRasterConversionLineEntry3D(nStep, *this);
+                        }
+
+                        aCurrentLine.push_back(&(*aCurrentEntry));
+                    }
+                }
+
+                ++aCurrentEntry;
+            }
+
+            // sort current scanline using comparator. Only X is used there
+            // since all entries are already in one processed line. This needs to be done
+            // every time since not only new spans may have benn added or old removed,
+            // but incrementing may also have changed the order
+            std::sort(aCurrentLine.begin(), aCurrentLine.end(), lineComparator());
+
+            // process current scanline
+            aRasterConversionLineEntry3D = aCurrentLine.begin();
+            aNextLine.clear();
+            sal_uInt32 nPairCount(0);
+
+            while(aRasterConversionLineEntry3D != aCurrentLine.end())
+            {
+                RasterConversionLineEntry3D& rPrevScanRasterConversionLineEntry3D(**aRasterConversionLineEntry3D++);
+
+                // look for 2nd span
+                if(aRasterConversionLineEntry3D != aCurrentLine.end())
+                {
+                    // work on span from rPrevScanRasterConversionLineEntry3D to aRasterConversionLineEntry3D, fLineNumber is valid
+                    processLineSpan(rPrevScanRasterConversionLineEntry3D, **aRasterConversionLineEntry3D, nLineNumber, nPairCount++);
+                }
+
+                // increment to next line
+                if(rPrevScanRasterConversionLineEntry3D.decrementRasterConversionLineEntry3D(1))
+                {
+                    rPrevScanRasterConversionLineEntry3D.incrementRasterConversionLineEntry3D(1, *this);
+                    aNextLine.push_back(&rPrevScanRasterConversionLineEntry3D);
+                }
+            }
+
+            // copy back next scanline if count has changed
+            if(aNextLine.size() != aCurrentLine.size())
+            {
+                aCurrentLine = aNextLine;
+            }
+
+            // increment fLineNumber
+            nLineNumber++;
+        }
+    }
+
+    void RasterConverter3D::addEdge(const B3DPolygon& rFill, sal_uInt32 a, sal_uInt32 b, const B3DHomMatrix* pViewToEye)
+    {
+        B3DPoint aStart(rFill.getB3DPoint(a));
+        B3DPoint aEnd(rFill.getB3DPoint(b));
+        sal_Int32 nYStart(fround(aStart.getY()));
+        sal_Int32 nYEnd(fround(aEnd.getY()));
+
+        if(nYStart == nYEnd)
+            return;
+
+        if(nYStart > nYEnd)
+        {
+            std::swap(aStart, aEnd);
+            std::swap(nYStart, nYEnd);
+            std::swap(a, b);
+        }
+
+        const sal_uInt32 nYDelta(nYEnd - nYStart);
+        const double fInvYDelta(1.0 / nYDelta);
+        maLineEntries.emplace_back(
+            aStart.getX(), (aEnd.getX() - aStart.getX()) * fInvYDelta,
+            aStart.getZ(), (aEnd.getZ() - aStart.getZ()) * fInvYDelta,
+            nYStart, nYDelta);
+
+        // if extra interpolation data is used, add it to the last created entry
+        RasterConversionLineEntry3D& rEntry = maLineEntries[maLineEntries.size() - 1];
+
+        if(rFill.areBColorsUsed())
+        {
+            rEntry.setColorIndex(addColorInterpolator(rFill.getBColor(a), rFill.getBColor(b), fInvYDelta));
+        }
+
+        if(rFill.areNormalsUsed())
+        {
+            rEntry.setNormalIndex(addNormalInterpolator(rFill.getNormal(a), rFill.getNormal(b), fInvYDelta));
+        }
+
+        if(!rFill.areTextureCoordinatesUsed())
+            return;
+
+        if(pViewToEye)
+        {
+            const double fEyeA(((*pViewToEye) * aStart).getZ());
+            const double fEyeB(((*pViewToEye) * aEnd).getZ());
+
+            rEntry.setInverseTextureIndex(addInverseTextureInterpolator(
+                rFill.getTextureCoordinate(a),
+                rFill.getTextureCoordinate(b),
+                fEyeA, fEyeB, fInvYDelta));
+        }
+        else
+        {
+            rEntry.setTextureIndex(addTextureInterpolator(
+                rFill.getTextureCoordinate(a),
+                rFill.getTextureCoordinate(b),
+                fInvYDelta));
+        }
+    }
+
+    void RasterConverter3D::rasterconvertB3DEdge(const B3DPolygon& rLine, sal_uInt32 nA, sal_uInt32 nB, sal_Int32 nStartLine, sal_Int32 nStopLine, sal_uInt16 nLineWidth)
+    {
+        B3DPoint aStart(rLine.getB3DPoint(nA));
+        B3DPoint aEnd(rLine.getB3DPoint(nB));
+        const double fZBufferLineAdd(0x00ff);
+
+        if(nLineWidth > 1)
+        {
+            // this is not a hairline anymore, in most cases since it's an oversampled
+            // hairline to get e.g. AA for Z-Buffering. Create fill geometry.
+            if(!aStart.equal(aEnd))
+            {
+                reset();
+                maLineEntries.clear();
+
+                B2DVector aVector(aEnd.getX() - aStart.getX(), aEnd.getY() - aStart.getY());
+                aVector.normalize();
+                const B2DVector aPerpend(getPerpendicular(aVector) * ((static_cast<double>(nLineWidth) + 0.5) * 0.5));
+                const double fZStartWithAdd(aStart.getZ() + fZBufferLineAdd);
+                const double fZEndWithAdd(aEnd.getZ() + fZBufferLineAdd);
+
+                B3DPolygon aPolygon;
+                aPolygon.append(B3DPoint(aStart.getX() + aPerpend.getX(), aStart.getY() + aPerpend.getY(), fZStartWithAdd));
+                aPolygon.append(B3DPoint(aEnd.getX() + aPerpend.getX(), aEnd.getY() + aPerpend.getY(), fZEndWithAdd));
+                aPolygon.append(B3DPoint(aEnd.getX() - aPerpend.getX(), aEnd.getY() - aPerpend.getY(), fZEndWithAdd));
+                aPolygon.append(B3DPoint(aStart.getX() - aPerpend.getX(), aStart.getY() - aPerpend.getY(), fZStartWithAdd));
+                aPolygon.setClosed(true);
+
+                addArea(aPolygon, nullptr);
+            }
+        }
+        else
+        {
+            // it's a hairline. Use direct RasterConversionLineEntry creation to
+            // rasterconvert lines as similar to areas as possible to avoid Z-Fighting
+            sal_Int32 nYStart(fround(aStart.getY()));
+            sal_Int32 nYEnd(fround(aEnd.getY()));
+
+            if(nYStart == nYEnd)
+            {
+                // horizontal line, check X
+                const sal_Int32 nXStart(static_cast<sal_Int32>(aStart.getX()));
+                const sal_Int32 nXEnd(static_cast<sal_Int32>(aEnd.getX()));
+
+                if(nXStart != nXEnd)
+                {
+                    reset();
+                    maLineEntries.clear();
+
+                    // horizontal line, create vertical entries. These will be sorted by
+                    // X anyways, so no need to distinguish the case here
+                    maLineEntries.emplace_back(
+                        aStart.getX(), 0.0,
+                        aStart.getZ() + fZBufferLineAdd, 0.0,
+                        nYStart, 1);
+                    maLineEntries.emplace_back(
+                        aEnd.getX(), 0.0,
+                        aEnd.getZ() + fZBufferLineAdd, 0.0,
+                        nYStart, 1);
+                }
+            }
+            else
+            {
+                reset();
+                maLineEntries.clear();
+
+                if(nYStart > nYEnd)
+                {
+                    std::swap(aStart, aEnd);
+                    std::swap(nYStart, nYEnd);
+                }
+
+                const sal_uInt32 nYDelta(static_cast<sal_uInt32>(nYEnd - nYStart));
+                const double fInvYDelta(1.0 / nYDelta);
+
+                // non-horizontal line, create two parallel entries. These will be sorted by
+                // X anyways, so no need to distinguish the case here
+                maLineEntries.emplace_back(
+                    aStart.getX(), (aEnd.getX() - aStart.getX()) * fInvYDelta,
+                    aStart.getZ() + fZBufferLineAdd, (aEnd.getZ() - aStart.getZ()) * fInvYDelta,
+                    nYStart, nYDelta);
+
+                RasterConversionLineEntry3D& rEntry = maLineEntries[maLineEntries.size() - 1];
+
+                // need to choose a X-Distance for the 2nd edge which guarantees all pixels
+                // of the line to be set. This is exactly the X-Increment for one Y-Step.
+                // Same is true for Z, so in both cases, add one increment to them. To also
+                // guarantee one pixel per line, add a minimum of one for X.
+                const double fDistanceX(fabs(rEntry.getX().getInc()) >= 1.0 ? rEntry.getX().getInc() : 1.0);
+
+                maLineEntries.emplace_back(
+                    rEntry.getX().getVal() + fDistanceX, rEntry.getX().getInc(),
+                    rEntry.getZ().getVal() + rEntry.getZ().getInc(), rEntry.getZ().getInc(),
+                    nYStart, nYDelta);
+            }
+        }
+
+        if(!maLineEntries.empty())
+        {
+            rasterconvertB3DArea(nStartLine, nStopLine);
+        }
+    }
+
+    void RasterConverter3D::rasterconvertB3DPolyPolygon(const B3DPolyPolygon& rFill, const B3DHomMatrix* pViewToEye, sal_Int32 nStartLine, sal_Int32 nStopLine)
+    {
+        reset();
+        maLineEntries.clear();
+        addArea(rFill, pViewToEye);
+        rasterconvertB3DArea(nStartLine, nStopLine);
+    }
+
+    void RasterConverter3D::rasterconvertB3DPolygon(const B3DPolygon& rLine, sal_Int32 nStartLine, sal_Int32 nStopLine, sal_uInt16 nLineWidth)
+    {
+        const sal_uInt32 nPointCount(rLine.count());
+
+        if(nPointCount)
+        {
+            const sal_uInt32 nEdgeCount(rLine.isClosed() ? nPointCount : nPointCount - 1);
+
+            for(sal_uInt32 a(0); a < nEdgeCount; a++)
+            {
+                rasterconvertB3DEdge(rLine, a, (a + 1) % nPointCount, nStartLine, nStopLine, nLineWidth);
+            }
+        }
+    }
+} // end of namespace basegfx
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */