Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

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

1 files changed, 297 insertions, 0 deletions

diff --git a/drawinglayer/source/processor3d/shadow3dextractor.cxx b/drawinglayer/source/processor3d/shadow3dextractor.cxx
new file mode 100644
index 000000000..91fc57aae
--- /dev/null
+++ b/drawinglayer/source/processor3d/shadow3dextractor.cxx
@@ -0,0 +1,297 @@
+/* -*- 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 <processor3d/shadow3dextractor.hxx>
+#include <primitive3d/shadowprimitive3d.hxx>
+#include <drawinglayer/primitive2d/shadowprimitive2d.hxx>
+#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>
+#include <drawinglayer/primitive3d/transformprimitive3d.hxx>
+#include <drawinglayer/primitive3d/polygonprimitive3d.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <drawinglayer/primitive3d/polypolygonprimitive3d.hxx>
+#include <basegfx/polygon/b2dpolypolygontools.hxx>
+#include <drawinglayer/primitive2d/PolygonHairlinePrimitive2D.hxx>
+#include <drawinglayer/primitive2d/PolyPolygonColorPrimitive2D.hxx>
+#include <drawinglayer/primitive3d/drawinglayer_primitivetypes3d.hxx>
+#include <rtl/ref.hxx>
+
+
+using namespace com::sun::star;
+
+
+namespace drawinglayer::processor3d
+{
+        // as tooling, the process() implementation takes over API handling and calls this
+        // virtual render method when the primitive implementation is BasePrimitive3D-based.
+        void Shadow3DExtractingProcessor::processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate)
+        {
+            // it is a BasePrimitive3D implementation, use getPrimitive3DID() call for switch
+            switch(rCandidate.getPrimitive3DID())
+            {
+                case PRIMITIVE3D_ID_SHADOWPRIMITIVE3D :
+                {
+                    // shadow3d object. Call recursive with content and start conversion
+                    const primitive3d::ShadowPrimitive3D& rPrimitive = static_cast< const primitive3d::ShadowPrimitive3D& >(rCandidate);
+
+                    // set new target
+                    primitive2d::Primitive2DContainer aNewSubList;
+                    primitive2d::Primitive2DContainer* pLastTargetSequence = mpPrimitive2DSequence;
+                    mpPrimitive2DSequence = &aNewSubList;
+
+                    // activate convert
+                    const bool bLastConvert(mbConvert);
+                    mbConvert = true;
+
+                    // set projection flag
+                    const bool bLastUseProjection(mbUseProjection);
+                    mbUseProjection = rPrimitive.getShadow3D();
+
+                    // process content
+                    process(rPrimitive.getChildren());
+
+                    // restore values
+                    mbUseProjection = bLastUseProjection;
+                    mbConvert = bLastConvert;
+                    mpPrimitive2DSequence = pLastTargetSequence;
+
+                    // create 2d shadow primitive with result. This also fetches all entries
+                    // from aNewSubList, so there is no need to delete them
+                    rtl::Reference<primitive2d::BasePrimitive2D> pNew = new primitive2d::ShadowPrimitive2D(
+                        rPrimitive.getShadowTransform(),
+                        rPrimitive.getShadowColor(),
+                        0,  // shadow3d doesn't have rPrimitive.getShadowBlur() yet.
+                        std::move(aNewSubList));
+
+                    if(basegfx::fTools::more(rPrimitive.getShadowTransparence(), 0.0))
+                    {
+                        // create simpleTransparencePrimitive, add created primitives
+                        primitive2d::Primitive2DContainer aNewTransPrimitiveVector { pNew };
+
+                        pNew = new primitive2d::UnifiedTransparencePrimitive2D(
+                            std::move(aNewTransPrimitiveVector),
+                            rPrimitive.getShadowTransparence());
+                    }
+
+                    mpPrimitive2DSequence->push_back(pNew);
+
+                    break;
+                }
+                case PRIMITIVE3D_ID_TRANSFORMPRIMITIVE3D :
+                {
+                    // transform group. Remember current transformations
+                    const primitive3d::TransformPrimitive3D& rPrimitive = static_cast< const primitive3d::TransformPrimitive3D& >(rCandidate);
+                    const geometry::ViewInformation3D aLastViewInformation3D(getViewInformation3D());
+
+                    // create new transformation; add new object transform from right side
+                    const geometry::ViewInformation3D aNewViewInformation3D(
+                        aLastViewInformation3D.getObjectTransformation() * rPrimitive.getTransformation(),
+                        aLastViewInformation3D.getOrientation(),
+                        aLastViewInformation3D.getProjection(),
+                        aLastViewInformation3D.getDeviceToView(),
+                        aLastViewInformation3D.getViewTime(),
+                        aLastViewInformation3D.getExtendedInformationSequence());
+                    updateViewInformation(aNewViewInformation3D);
+
+                    if(mbShadowProjectionIsValid)
+                    {
+                        // update buffered WorldToEye and EyeToView
+                        maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
+                        maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
+                    }
+
+                    // let break down
+                    process(rPrimitive.getChildren());
+
+                    // restore transformations
+                    updateViewInformation(aLastViewInformation3D);
+
+                    if(mbShadowProjectionIsValid)
+                    {
+                        // update buffered WorldToEye and EyeToView
+                        maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
+                        maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
+                    }
+                    break;
+                }
+                case PRIMITIVE3D_ID_POLYGONHAIRLINEPRIMITIVE3D :
+                {
+                    // PolygonHairlinePrimitive3D
+                    if(mbConvert)
+                    {
+                        const primitive3d::PolygonHairlinePrimitive3D& rPrimitive = static_cast< const primitive3d::PolygonHairlinePrimitive3D& >(rCandidate);
+                        basegfx::B2DPolygon a2DHairline;
+
+                        if(mbUseProjection)
+                        {
+                            if(mbShadowProjectionIsValid)
+                            {
+                                a2DHairline = impDoShadowProjection(rPrimitive.getB3DPolygon());
+                            }
+                        }
+                        else
+                        {
+                            a2DHairline = basegfx::utils::createB2DPolygonFromB3DPolygon(rPrimitive.getB3DPolygon(), getViewInformation3D().getObjectToView());
+                        }
+
+                        if(a2DHairline.count())
+                        {
+                            a2DHairline.transform(getObjectTransformation());
+                            mpPrimitive2DSequence->push_back(
+                                new primitive2d::PolygonHairlinePrimitive2D(
+                                    a2DHairline,
+                                    basegfx::BColor()));
+                        }
+                    }
+                    break;
+                }
+                case PRIMITIVE3D_ID_POLYPOLYGONMATERIALPRIMITIVE3D :
+                {
+                    // PolyPolygonMaterialPrimitive3D
+                    if(mbConvert)
+                    {
+                        const primitive3d::PolyPolygonMaterialPrimitive3D& rPrimitive = static_cast< const primitive3d::PolyPolygonMaterialPrimitive3D& >(rCandidate);
+                        basegfx::B2DPolyPolygon a2DFill;
+
+                        if(mbUseProjection)
+                        {
+                            if(mbShadowProjectionIsValid)
+                            {
+                                a2DFill = impDoShadowProjection(rPrimitive.getB3DPolyPolygon());
+                            }
+                        }
+                        else
+                        {
+                            a2DFill = basegfx::utils::createB2DPolyPolygonFromB3DPolyPolygon(rPrimitive.getB3DPolyPolygon(), getViewInformation3D().getObjectToView());
+                        }
+
+                        if(a2DFill.count())
+                        {
+                            a2DFill.transform(getObjectTransformation());
+                            mpPrimitive2DSequence->push_back(
+                                new primitive2d::PolyPolygonColorPrimitive2D(
+                                    a2DFill,
+                                    basegfx::BColor()));
+                        }
+                    }
+                    break;
+                }
+                default :
+                {
+                    // process recursively
+                    process(rCandidate.get3DDecomposition(getViewInformation3D()));
+                    break;
+                }
+            }
+        }
+
+        Shadow3DExtractingProcessor::Shadow3DExtractingProcessor(
+            const geometry::ViewInformation3D& rViewInformation,
+            const basegfx::B2DHomMatrix& rObjectTransformation,
+            const basegfx::B3DVector& rLightNormal,
+            double fShadowSlant,
+            const basegfx::B3DRange& rContained3DRange)
+        :   BaseProcessor3D(rViewInformation),
+            mpPrimitive2DSequence(&maPrimitive2DSequence),
+            maObjectTransformation(rObjectTransformation),
+            maLightNormal(rLightNormal),
+            mfLightPlaneScalar(0.0),
+            mbShadowProjectionIsValid(false),
+            mbConvert(false),
+            mbUseProjection(false)
+        {
+            // normalize light normal, get and normalize shadow plane normal and calculate scalar from it
+            maLightNormal.normalize();
+            maShadowPlaneNormal = basegfx::B3DVector(0.0, sin(fShadowSlant), cos(fShadowSlant));
+            maShadowPlaneNormal.normalize();
+            mfLightPlaneScalar = maLightNormal.scalar(maShadowPlaneNormal);
+
+            // use only when scalar is > 0.0, so the light is in front of the object
+            if(!basegfx::fTools::more(mfLightPlaneScalar, 0.0))
+                return;
+
+            // prepare buffered WorldToEye and EyeToView
+            maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
+            maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
+
+            // calculate range to get front edge around which to rotate the shadow's projection
+            basegfx::B3DRange aContained3DRange(rContained3DRange);
+            aContained3DRange.transform(getWorldToEye());
+            maPlanePoint.setX(maShadowPlaneNormal.getX() < 0.0 ? aContained3DRange.getMinX() : aContained3DRange.getMaxX());
+            maPlanePoint.setY(maShadowPlaneNormal.getY() > 0.0 ? aContained3DRange.getMinY() : aContained3DRange.getMaxY());
+            maPlanePoint.setZ(aContained3DRange.getMinZ() - (aContained3DRange.getDepth() / 8.0));
+
+            // set flag that shadow projection is prepared and allowed
+            mbShadowProjectionIsValid = true;
+        }
+
+        Shadow3DExtractingProcessor::~Shadow3DExtractingProcessor()
+        {
+            OSL_ENSURE(maPrimitive2DSequence.empty(),
+                "OOps, someone used Shadow3DExtractingProcessor, but did not fetch the results (!)");
+        }
+
+        basegfx::B2DPolygon Shadow3DExtractingProcessor::impDoShadowProjection(const basegfx::B3DPolygon& rSource)
+        {
+            basegfx::B2DPolygon aRetval;
+
+            for(sal_uInt32 a(0); a < rSource.count(); a++)
+            {
+                // get point, transform to eye coordinate system
+                basegfx::B3DPoint aCandidate(rSource.getB3DPoint(a));
+                aCandidate *= getWorldToEye();
+
+                // we are in eye coordinates
+                // ray is (aCandidate + fCut * maLightNormal)
+                // plane is (maPlanePoint, maShadowPlaneNormal)
+                // maLightNormal.scalar(maShadowPlaneNormal) is already in mfLightPlaneScalar and > 0.0
+                // get cut point of ray with shadow plane
+                const double fCut(basegfx::B3DVector(maPlanePoint - aCandidate).scalar(maShadowPlaneNormal) / mfLightPlaneScalar);
+                aCandidate += maLightNormal * fCut;
+
+                // transform to view, use 2d coordinates
+                aCandidate *= maEyeToView;
+                aRetval.append(basegfx::B2DPoint(aCandidate.getX(), aCandidate.getY()));
+            }
+
+            // copy closed flag
+            aRetval.setClosed(rSource.isClosed());
+
+            return aRetval;
+        }
+
+        basegfx::B2DPolyPolygon Shadow3DExtractingProcessor::impDoShadowProjection(const basegfx::B3DPolyPolygon& rSource)
+        {
+            basegfx::B2DPolyPolygon aRetval;
+
+            for(sal_uInt32 a(0); a < rSource.count(); a++)
+            {
+                aRetval.append(impDoShadowProjection(rSource.getB3DPolygon(a)));
+            }
+
+            return aRetval;
+        }
+
+        const primitive2d::Primitive2DContainer& Shadow3DExtractingProcessor::getPrimitive2DSequence() const
+        {
+            return maPrimitive2DSequence;
+        }
+
+} // end of namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */