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, 209 insertions, 0 deletions

diff --git a/slideshow/source/engine/transitions/clippingfunctor.cxx b/slideshow/source/engine/transitions/clippingfunctor.cxx
new file mode 100644
index 000000000..be592ac49
--- /dev/null
+++ b/slideshow/source/engine/transitions/clippingfunctor.cxx
@@ -0,0 +1,209 @@
+/* -*- 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 <tools/diagnose_ex.h>
+#include "clippingfunctor.hxx"
+
+#include <basegfx/polygon/b2dpolypolygoncutter.hxx>
+#include <basegfx/polygon/b2dpolypolygontools.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+
+namespace slideshow::internal
+{
+        ClippingFunctor::ClippingFunctor(const ParametricPolyPolygonSharedPtr&   rPolygon,
+                                         const TransitionInfo&                   rTransitionInfo,
+                                         bool                                    bDirectionForward,
+                                         bool                                    bModeIn ) :
+            mpParametricPoly( rPolygon ),
+            maStaticTransformation(),
+            mbForwardParameterSweep( true ),
+            mbSubtractPolygon( false ),
+            mbScaleIsotrophically( rTransitionInfo.mbScaleIsotrophically ),
+            mbFlip(false)
+        {
+            ENSURE_OR_THROW( rPolygon,
+                              "ClippingFunctor::ClippingFunctor(): Invalid parametric polygon" );
+
+            // maBackgroundRect serves as the minuent when
+            // subtracting a given clip polygon from the
+            // background. To speed up the clipper algo, avoid
+            // actual intersections of the generated
+            // poly-polygon with the minuent - i.e. choose the
+            // polygon to subtract from sufficiently large.
+
+            // blow up unit rect to (-1,-1),(2,2)
+            // AW: Not needed, just use range
+            // ::basegfx::B2DHomMatrix aMatrix;
+            // aMatrix.scale(3.0,3.0);
+            // aMatrix.translate(-1.0,-1.0);
+            // maBackgroundRect.transform( aMatrix );
+
+            // extract modification info from maTransitionInfo
+
+
+            // perform general transformations _before_ the reverse
+            // mode changes. This allows the Transition table to be
+            // filled more consistently (otherwise, when e.g. rotating
+            // a clip 90 degrees, the ReverseMethod::FlipX becomes
+            // ReverseMethod::FlipY instead)
+            if (rTransitionInfo.mnRotationAngle != 0.0 ||
+                rTransitionInfo.mnScaleX != 1.0 ||
+                rTransitionInfo.mnScaleY != 1.0)
+            {
+                maStaticTransformation.translate( -0.5, -0.5 );
+                // apply further transformations:
+                if (rTransitionInfo.mnRotationAngle != 0.0)
+                {
+                    maStaticTransformation.rotate(
+                        basegfx::deg2rad(rTransitionInfo.mnRotationAngle) );
+                }
+                if (rTransitionInfo.mnScaleX != 1.0 ||
+                    rTransitionInfo.mnScaleY != 1.0)
+                {
+                    maStaticTransformation.scale(
+                        rTransitionInfo.mnScaleX,
+                        rTransitionInfo.mnScaleY );
+                }
+                maStaticTransformation.translate( 0.5, 0.5 );
+            }
+
+            if( !bDirectionForward )
+            {
+                // Client has requested reversed
+                // direction. Apply TransitionInfo's choice
+                // for that
+                switch( rTransitionInfo.meReverseMethod )
+                {
+                    default:
+                        ENSURE_OR_THROW(
+                            false,
+                            "TransitionFactory::TransitionFactory(): Unexpected reverse method" );
+                        break;
+
+                    case TransitionInfo::ReverseMethod::Ignore:
+                        break;
+
+                    case TransitionInfo::ReverseMethod::SubtractAndInvert:
+                        mbForwardParameterSweep = !mbForwardParameterSweep;
+                        mbSubtractPolygon = !mbSubtractPolygon;
+                        break;
+
+                    case TransitionInfo::ReverseMethod::Rotate180:
+                        maStaticTransformation = basegfx::utils::createRotateAroundPoint(0.5, 0.5, M_PI)
+                            * maStaticTransformation;
+                        break;
+
+                    case TransitionInfo::ReverseMethod::FlipX:
+                        maStaticTransformation = basegfx::utils::createScaleTranslateB2DHomMatrix(-1.0, 1.0, 1.0, 0.0)
+                            * maStaticTransformation;
+                        mbFlip = true;
+                        break;
+
+                    case TransitionInfo::ReverseMethod::FlipY:
+                        maStaticTransformation = basegfx::utils::createScaleTranslateB2DHomMatrix(1.0, -1.0, 0.0, 1.0)
+                            * maStaticTransformation;
+                        mbFlip = true;
+                        break;
+                }
+            }
+
+            if( !bModeIn )
+            {
+                // client has requested 'out' mode. Apply
+                // TransitionInfo's method of choice
+                if( rTransitionInfo.mbOutInvertsSweep )
+                    mbForwardParameterSweep = !mbForwardParameterSweep;
+                else
+                    mbSubtractPolygon = !mbSubtractPolygon;
+            }
+        }
+
+        ::basegfx::B2DPolyPolygon ClippingFunctor::operator()( double                       nValue,
+                                                               const ::basegfx::B2DSize&    rTargetSize )
+        {
+            // modify clip polygon according to static
+            // transformation plus current shape size
+            ::basegfx::B2DHomMatrix aMatrix( maStaticTransformation );
+
+            // retrieve current clip polygon
+            ::basegfx::B2DPolyPolygon aClipPoly = (*mpParametricPoly)(
+                mbForwardParameterSweep ? nValue : 1.0 - nValue );
+
+            // TODO(Q4): workaround here, better be fixed in cppcanvas
+            if (aClipPoly.count() == 0)
+                aClipPoly.append( basegfx::B2DPolygon() );
+
+            if (mbFlip)
+                aClipPoly.flip();
+
+            if( mbSubtractPolygon )
+            {
+                // subtract given polygon from background
+                // rect. Do that before any transformations.
+
+                // calc maBackgroundRect \ aClipPoly
+                // =================================
+
+                // AW: Simplified
+                // use a range with fixed size (-1,-1),(2,2)
+                const basegfx::B2DRange aBackgroundRange(-1, -1, 2, 2);
+                const basegfx::B2DRange aClipPolyRange(aClipPoly.getB2DRange());
+
+                if(aBackgroundRange.isInside(aClipPolyRange))
+                {
+                    // combine polygons; make the clip polygon the hole
+                    aClipPoly = ::basegfx::utils::correctOrientations(aClipPoly);
+                    aClipPoly.flip();
+                    aClipPoly.insert(0, basegfx::utils::createPolygonFromRect(aBackgroundRange));
+                }
+                else
+                {
+                    // when not completely inside aBackgroundRange clipping is needed
+                    // subtract aClipPoly from aBackgroundRange
+                    const basegfx::B2DPolyPolygon aBackgroundPolyPoly(basegfx::utils::createPolygonFromRect(aBackgroundRange));
+                    aClipPoly = basegfx::utils::solvePolygonOperationDiff(aBackgroundPolyPoly, aClipPoly);
+                }
+            }
+
+            // scale polygon up to current shape size
+            if( mbScaleIsotrophically )
+            {
+                const double nScale( ::std::max( rTargetSize.getX(),
+                                                 rTargetSize.getY() ) );
+                aMatrix.scale( nScale, nScale );
+                aMatrix.translate( -(nScale-rTargetSize.getX())/2.0,
+                                   -(nScale-rTargetSize.getY())/2.0 );
+            }
+            else
+            {
+                aMatrix.scale( rTargetSize.getX(),
+                               rTargetSize.getY() );
+            }
+
+            // apply cumulative transformation to clip polygon
+            aClipPoly.transform( aMatrix );
+
+            return aClipPoly;
+        }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */