Adding upstream version 4:24.2.0.upstream/4%24.2.0

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

1 files changed, 177 insertions, 0 deletions

diff --git a/slideshow/source/engine/transitions/combtransition.cxx b/slideshow/source/engine/transitions/combtransition.cxx
new file mode 100644
index 0000000000..88e5c167e4
--- /dev/null
+++ b/slideshow/source/engine/transitions/combtransition.cxx
@@ -0,0 +1,177 @@
+/* -*- 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/polygon/b2dpolygon.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+
+#include "combtransition.hxx"
+
+namespace slideshow::internal {
+
+namespace {
+
+basegfx::B2DPolyPolygon createClipPolygon(
+    const ::basegfx::B2DVector& rDirection,
+    const ::basegfx::B2DSize& rSlideSize,
+    int nNumStrips, int nOffset )
+{
+    // create clip polygon in standard orientation (will later
+    // be rotated to match direction vector)
+    ::basegfx::B2DPolyPolygon aClipPoly;
+
+    // create nNumStrips/2 vertical strips
+    for( int i=nOffset; i<nNumStrips; i+=2 )
+    {
+        aClipPoly.append(
+            ::basegfx::utils::createPolygonFromRect(
+                ::basegfx::B2DRectangle( double(i)/nNumStrips, 0.0,
+                                         double(i+1)/nNumStrips, 1.0) ) );
+
+    }
+
+    // rotate polygons, such that the strips are parallel to
+    // the given direction vector
+    const ::basegfx::B2DVector aUpVec(0.0, 1.0);
+    basegfx::B2DHomMatrix aMatrix(basegfx::utils::createRotateAroundPoint(0.5, 0.5, aUpVec.angle( rDirection )));
+
+    // blow up clip polygon to slide size
+    aMatrix.scale(rSlideSize.getWidth(), rSlideSize.getHeight());
+
+    aClipPoly.transform( aMatrix );
+
+    return aClipPoly;
+}
+
+}
+
+CombTransition::CombTransition(
+    std::optional<SlideSharedPtr> const & leavingSlide,
+    const SlideSharedPtr&                   pEnteringSlide,
+    const SoundPlayerSharedPtr&             pSoundPlayer,
+    const UnoViewContainer&                 rViewContainer,
+    ScreenUpdater&                          rScreenUpdater,
+    EventMultiplexer&                       rEventMultiplexer,
+    const ::basegfx::B2DVector&             rPushDirection,
+    sal_Int32                               nNumStripes )
+    : SlideChangeBase( leavingSlide, pEnteringSlide, pSoundPlayer,
+                       rViewContainer, rScreenUpdater, rEventMultiplexer,
+                       false /* no leaving sprite */,
+                       false /* no entering sprite */ ),
+      maPushDirectionUnit( rPushDirection ),
+      mnNumStripes( nNumStripes )
+{
+}
+
+void CombTransition::renderComb( double           t,
+                                 const ViewEntry& rViewEntry ) const
+{
+    const SlideBitmapSharedPtr& pEnteringBitmap = getEnteringBitmap(rViewEntry);
+    const cppcanvas::CanvasSharedPtr pCanvas_ = rViewEntry.mpView->getCanvas();
+
+    if( !pEnteringBitmap || !pCanvas_ )
+        return;
+
+    // calc bitmap offsets. The enter/leaving bitmaps are only
+    // as large as the actual slides. For scaled-down
+    // presentations, we have to move the left, top edge of
+    // those bitmaps to the actual position, governed by the
+    // given view transform. The aBitmapPosPixel local
+    // variable is already in device coordinate space
+    // (i.e. pixel).
+
+    // TODO(F2): Properly respect clip here. Might have to be transformed, too.
+    const basegfx::B2DHomMatrix viewTransform( rViewEntry.mpView->getTransformation() );
+    const basegfx::B2DPoint pageOrigin( viewTransform * basegfx::B2DPoint() );
+
+    // change transformation on cloned canvas to be in
+    // device pixel
+    cppcanvas::CanvasSharedPtr pCanvas( pCanvas_->clone() );
+    basegfx::B2DPoint p;
+
+    // TODO(Q2): Use basegfx bitmaps here
+    // TODO(F1): SlideBitmap is not fully portable between different canvases!
+
+    auto aSlideSizePixel = getEnteringSlideSizePixel(rViewEntry.mpView);
+    const basegfx::B2DVector enteringSizePixel(aSlideSizePixel.getWidth(), aSlideSizePixel.getHeight());
+
+    const basegfx::B2DVector aPushDirection(
+        enteringSizePixel * maPushDirectionUnit );
+    const basegfx::B2DPolyPolygon aClipPolygon1 =
+        createClipPolygon( maPushDirectionUnit,
+                           basegfx::B2DSize(enteringSizePixel.getX(), enteringSizePixel.getY()),
+                           mnNumStripes, 0 );
+    const basegfx::B2DPolyPolygon aClipPolygon2 =
+        createClipPolygon( maPushDirectionUnit,
+                           basegfx::B2DSize(enteringSizePixel.getX(), enteringSizePixel.getY()),
+                           mnNumStripes, 1 );
+
+    SlideBitmapSharedPtr const & pLeavingBitmap = getLeavingBitmap(rViewEntry);
+    if( pLeavingBitmap )
+    {
+        // render odd strips:
+        pLeavingBitmap->clip( aClipPolygon1 );
+        // don't modify bitmap object (no move!):
+        p = basegfx::B2DPoint( pageOrigin + (t * aPushDirection) );
+        pCanvas->setTransformation(basegfx::utils::createTranslateB2DHomMatrix(p.getX(), p.getY()));
+        pLeavingBitmap->draw( pCanvas );
+
+        // render even strips:
+        pLeavingBitmap->clip( aClipPolygon2 );
+        // don't modify bitmap object (no move!):
+        p = basegfx::B2DPoint( pageOrigin - (t * aPushDirection) );
+        pCanvas->setTransformation(basegfx::utils::createTranslateB2DHomMatrix(p.getX(), p.getY()));
+        pLeavingBitmap->draw( pCanvas );
+    }
+
+    // TODO(Q2): Use basegfx bitmaps here
+    // TODO(F1): SlideBitmap is not fully portable between different canvases!
+
+    // render odd strips:
+    pEnteringBitmap->clip( aClipPolygon1 );
+    // don't modify bitmap object (no move!):
+    p = basegfx::B2DPoint( pageOrigin + ((t - 1.0) * aPushDirection) );
+    pCanvas->setTransformation(basegfx::utils::createTranslateB2DHomMatrix(p.getX(), p.getY()));
+    pEnteringBitmap->draw( pCanvas );
+
+    // render even strips:
+    pEnteringBitmap->clip( aClipPolygon2 );
+    // don't modify bitmap object (no move!):
+    p = basegfx::B2DPoint( pageOrigin + ((1.0 - t) * aPushDirection) );
+    pCanvas->setTransformation(basegfx::utils::createTranslateB2DHomMatrix(p.getX(), p.getY()));
+    pEnteringBitmap->draw( pCanvas );
+}
+
+bool CombTransition::operator()( double t )
+{
+    std::for_each( beginViews(),
+                   endViews(),
+                   [this, &t]( const ViewEntry& rViewEntry )
+                   { return this->renderComb( t, rViewEntry ); } );
+
+    getScreenUpdater().notifyUpdate();
+
+    return true;
+}
+
+} // namespace slideshow::internal
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */