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, 510 insertions, 0 deletions

diff --git a/slideshow/source/engine/transitions/slidechangebase.cxx b/slideshow/source/engine/transitions/slidechangebase.cxx
new file mode 100644
index 000000000..460f53cf4
--- /dev/null
+++ b/slideshow/source/engine/transitions/slidechangebase.cxx
@@ -0,0 +1,510 @@
+/* -*- 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 <basegfx/matrix/b2dhommatrixtools.hxx>
+#include <cppcanvas/basegfxfactory.hxx>
+#include <cppcanvas/customsprite.hxx>
+
+#include "slidechangebase.hxx"
+#include <tools.hxx>
+
+#include <algorithm>
+
+using namespace com::sun::star;
+
+namespace slideshow::internal {
+
+SlideChangeBase::SlideChangeBase( std::optional<SlideSharedPtr> const & leavingSlide,
+                                  const SlideSharedPtr&                   pEnteringSlide,
+                                  const SoundPlayerSharedPtr&             pSoundPlayer,
+                                  const UnoViewContainer&                 rViewContainer,
+                                  ScreenUpdater&                          rScreenUpdater,
+                                  EventMultiplexer&                       rEventMultiplexer,
+                                  bool                                    bCreateLeavingSprites,
+                                  bool                                    bCreateEnteringSprites ) :
+      mpSoundPlayer( pSoundPlayer ),
+      mrEventMultiplexer(rEventMultiplexer),
+      mrScreenUpdater(rScreenUpdater),
+      maLeavingSlide( leavingSlide ),
+      mpEnteringSlide( pEnteringSlide ),
+      maViewData(),
+      mrViewContainer(rViewContainer),
+      mbCreateLeavingSprites(bCreateLeavingSprites),
+      mbCreateEnteringSprites(bCreateEnteringSprites),
+      mbSpritesVisible(false),
+      mbFinished(false),
+      mbPrefetched(false)
+{
+    ENSURE_OR_THROW(
+        pEnteringSlide,
+        "SlideChangeBase::SlideChangeBase(): Invalid entering slide!" );
+}
+
+SlideBitmapSharedPtr SlideChangeBase::getLeavingBitmap( const ViewEntry& rViewEntry ) const
+{
+    if( !rViewEntry.mpLeavingBitmap )
+        rViewEntry.mpLeavingBitmap = createBitmap(rViewEntry.mpView,
+                                                  maLeavingSlide);
+
+    return rViewEntry.mpLeavingBitmap;
+}
+
+SlideBitmapSharedPtr SlideChangeBase::getEnteringBitmap( const ViewEntry& rViewEntry ) const
+{
+    if( !rViewEntry.mpEnteringBitmap )
+        rViewEntry.mpEnteringBitmap = createBitmap( rViewEntry.mpView,
+                                                    std::optional<SlideSharedPtr>(mpEnteringSlide) );
+
+    return rViewEntry.mpEnteringBitmap;
+}
+
+SlideBitmapSharedPtr SlideChangeBase::createBitmap( const UnoViewSharedPtr&                rView,
+                                                    const std::optional<SlideSharedPtr>& rSlide ) const
+{
+    SlideBitmapSharedPtr pRet;
+    if( !rSlide )
+        return pRet;
+
+    SlideSharedPtr const & pSlide = *rSlide;
+    if( !pSlide )
+    {
+        // TODO(P3): No need to generate a bitmap here. This only made
+        // the code more uniform. Faster would be to simply clear the
+        // sprite to black.
+
+        // create empty, black-filled bitmap
+        const basegfx::B2ISize slideSizePixel(
+            getSlideSizePixel( basegfx::B2DSize( mpEnteringSlide->getSlideSize() ),
+                               rView ));
+
+        cppcanvas::CanvasSharedPtr pCanvas( rView->getCanvas() );
+
+        // create a bitmap of appropriate size
+        cppcanvas::BitmapSharedPtr pBitmap(
+            cppcanvas::BaseGfxFactory::createBitmap(
+                pCanvas,
+                slideSizePixel ) );
+
+        ENSURE_OR_THROW(
+            pBitmap,
+            "SlideChangeBase::createBitmap(): Cannot create page bitmap" );
+
+        cppcanvas::BitmapCanvasSharedPtr pBitmapCanvas(
+            pBitmap->getBitmapCanvas() );
+
+        ENSURE_OR_THROW( pBitmapCanvas,
+                          "SlideChangeBase::createBitmap(): "
+                          "Cannot create page bitmap canvas" );
+
+        // set transformation to identity (->device pixel)
+        pBitmapCanvas->setTransformation( ::basegfx::B2DHomMatrix() );
+
+        // clear bitmap to black
+        fillRect( pBitmapCanvas,
+                  ::basegfx::B2DRectangle( 0.0, 0.0,
+                                           slideSizePixel.getX(),
+                                           slideSizePixel.getY() ),
+                  0x000000FFU );
+
+        pRet = std::make_shared<SlideBitmap>( pBitmap );
+    }
+    else
+    {
+        pRet = pSlide->getCurrentSlideBitmap( rView );
+    }
+
+    return pRet;
+}
+
+::basegfx::B2ISize SlideChangeBase::getEnteringSlideSizePixel( const UnoViewSharedPtr& pView ) const
+{
+    return getSlideSizePixel( basegfx::B2DSize( mpEnteringSlide->getSlideSize() ),
+                              pView );
+}
+
+void SlideChangeBase::renderBitmap(
+    SlideBitmapSharedPtr const & pSlideBitmap,
+    cppcanvas::CanvasSharedPtr const & pCanvas )
+{
+    if( !(pSlideBitmap && pCanvas) )
+        return;
+
+    // need to render without any transformation (we
+    // assume device units):
+    const basegfx::B2DHomMatrix viewTransform(
+        pCanvas->getTransformation() );
+    const basegfx::B2DPoint pageOrigin(
+        viewTransform * basegfx::B2DPoint() );
+    const cppcanvas::CanvasSharedPtr pDevicePixelCanvas(
+        pCanvas->clone() );
+
+    // render at output position, don't modify bitmap object (no move!):
+    const basegfx::B2DHomMatrix transform(basegfx::utils::createTranslateB2DHomMatrix(
+        pageOrigin.getX(), pageOrigin.getY()));
+
+    pDevicePixelCanvas->setTransformation( transform );
+    pSlideBitmap->draw( pDevicePixelCanvas );
+}
+
+void SlideChangeBase::prefetch()
+{
+    // we're a one-shot activity, and already finished
+    if( mbFinished || mbPrefetched )
+        return;
+
+    // register ourselves for view change events
+    mrEventMultiplexer.addViewHandler( std::dynamic_pointer_cast<ViewEventHandler>(shared_from_this()) );
+
+    // init views and create slide bitmaps
+    for( const auto& pView : mrViewContainer )
+        viewAdded( pView );
+
+    mbPrefetched = true;
+}
+
+void SlideChangeBase::start( const AnimatableShapeSharedPtr&     /*rShape*/,
+                             const ShapeAttributeLayerSharedPtr& /*rLayer*/ )
+{
+    // we're a one-shot activity, and already finished
+    if( mbFinished )
+        return;
+
+    prefetch(); // no-op, if already done
+
+    // get the subclasses a chance to do any specific initialization before run
+    for ( ViewsVecT::const_iterator aCurr( beginViews() ), aEnd( endViews() ); aCurr != aEnd; ++aCurr )
+        prepareForRun( *aCurr, aCurr->mpView->getCanvas() );
+
+    // start accompanying sound effect, if any
+    if( mpSoundPlayer )
+    {
+        mpSoundPlayer->startPlayback();
+        // xxx todo: for now, presentation.cxx takes care about the slide
+        // #i50492#  transition sound object, so just release it here
+        mpSoundPlayer.reset();
+    }
+}
+
+void SlideChangeBase::end()
+{
+    // we're a one-shot activity, and already finished
+    if( mbFinished )
+        return;
+
+    try
+    {
+        // draw fully entered bitmap:
+        ViewsVecT::const_iterator aCurr( beginViews() );
+        const ViewsVecT::const_iterator aEnd( endViews() );
+        while( aCurr != aEnd )
+        {
+            // fully clear view content to background color
+            aCurr->mpView->clearAll();
+
+            const SlideBitmapSharedPtr pSlideBitmap( getEnteringBitmap( *aCurr ));
+            pSlideBitmap->clip( basegfx::B2DPolyPolygon() /* no clipping */ );
+            aCurr->mpView->clearAll();
+            renderBitmap( pSlideBitmap,
+                          aCurr->mpView->getCanvas() );
+
+            ++aCurr;
+        }
+    }
+    catch( uno::Exception& )
+    {
+        // make sure releasing below happens
+    }
+
+    // swap changes to screen
+    mrScreenUpdater.notifyUpdate();
+
+    // make object dysfunctional
+    mbFinished = true;
+    ViewsVecT().swap(maViewData);
+    maLeavingSlide.reset();
+    mpEnteringSlide.reset();
+
+    // sprites have been binned above
+    mbSpritesVisible = false;
+
+    // remove also from event multiplexer, we're dead anyway
+    mrEventMultiplexer.removeViewHandler( std::dynamic_pointer_cast<ViewEventHandler>(shared_from_this()) );
+}
+
+bool SlideChangeBase::operator()( double nValue )
+{
+    if( mbFinished )
+        return false;
+
+    const std::size_t nEntries( maViewData.size() );
+    bool bSpritesVisible( mbSpritesVisible );
+
+    for( ::std::size_t i=0; i<nEntries; ++i )
+    {
+        // calc sprite 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 aSpritePosPixel local
+        // variable is already in device coordinate space
+        // (i.e. pixel).
+
+        ViewEntry& rViewEntry( maViewData[i] );
+        const ::cppcanvas::CanvasSharedPtr& rCanvas( rViewEntry.mpView->getCanvas() );
+        ::cppcanvas::CustomSpriteSharedPtr& rInSprite( rViewEntry.mpInSprite );
+        ::cppcanvas::CustomSpriteSharedPtr& rOutSprite( rViewEntry.mpOutSprite );
+
+        // TODO(F2): Properly respect clip here.
+
+        // Might have to be transformed, too.
+        const ::basegfx::B2DHomMatrix aViewTransform(
+            rViewEntry.mpView->getTransformation() );
+        const ::basegfx::B2DPoint aSpritePosPixel(
+            aViewTransform * ::basegfx::B2DPoint() );
+
+        // move sprite to final output position, in
+        // device coordinates
+        if( rOutSprite )
+            rOutSprite->movePixel( aSpritePosPixel );
+        if( rInSprite )
+            rInSprite->movePixel( aSpritePosPixel );
+
+        if( !mbSpritesVisible )
+        {
+            if( rOutSprite )
+            {
+                // only render once: clipping is done
+                // exclusively with the sprite
+                const ::cppcanvas::CanvasSharedPtr pOutContentCanvas(
+                    rOutSprite->getContentCanvas() );
+                if( pOutContentCanvas)
+                {
+                    // TODO(Q2): Use basegfx bitmaps here
+
+                    // TODO(F1): SlideBitmap is not fully portable
+                    // between different canvases!
+
+                    // render the content
+                    OSL_ASSERT( getLeavingBitmap( rViewEntry ) );
+                    if( getLeavingBitmap( rViewEntry ) )
+                        getLeavingBitmap( rViewEntry )->draw( pOutContentCanvas );
+                }
+            }
+
+            if( rInSprite )
+            {
+                // only render once: clipping is done
+                // exclusively with the sprite
+                const ::cppcanvas::CanvasSharedPtr pInContentCanvas(
+                    rInSprite->getContentCanvas() );
+                if( pInContentCanvas )
+                {
+                    // TODO(Q2): Use basegfx bitmaps here
+
+                    // TODO(F1): SlideBitmap is not fully portable
+                    // between different canvases!
+
+                    // render the content
+                    getEnteringBitmap( rViewEntry )->draw( pInContentCanvas );
+                }
+            }
+        }
+
+        if( rOutSprite )
+            performOut( rOutSprite, rViewEntry, rCanvas, nValue );
+        if( rInSprite )
+            performIn( rInSprite, rViewEntry, rCanvas, nValue );
+
+        // finishing deeds for first run.
+        if( !mbSpritesVisible)
+        {
+            // enable sprites:
+            if( rOutSprite )
+                rOutSprite->show();
+            if( rInSprite )
+                rInSprite->show();
+            bSpritesVisible = true;
+        }
+    } // for_each( sprite )
+
+    mbSpritesVisible = bSpritesVisible;
+    mrScreenUpdater.notifyUpdate();
+
+    return true;
+}
+
+void SlideChangeBase::prepareForRun(
+    const ViewEntry& /* rViewEntry */,
+    const cppcanvas::CanvasSharedPtr& /* rDestinationCanvas */ )
+{
+}
+
+void SlideChangeBase::performIn(
+    const cppcanvas::CustomSpriteSharedPtr&   /*rSprite*/,
+    const ViewEntry&                          /*rViewEntry*/,
+    const cppcanvas::CanvasSharedPtr&         /*rDestinationCanvas*/,
+    double                                    /*t*/ )
+{
+}
+
+void SlideChangeBase::performOut(
+    const cppcanvas::CustomSpriteSharedPtr&  /*rSprite*/,
+    const ViewEntry&                         /*rViewEntry*/,
+    const cppcanvas::CanvasSharedPtr&        /*rDestinationCanvas*/,
+    double                                   /*t*/ )
+{
+}
+
+double SlideChangeBase::getUnderlyingValue() const
+{
+    return 0.0;     // though this should be used in concert with
+                    // ActivitiesFactory::createSimpleActivity, better
+                    // explicitly name our start value.
+                    // Permissible range for operator() above is [0,1]
+}
+
+void SlideChangeBase::viewAdded( const UnoViewSharedPtr& rView )
+{
+    // we're a one-shot activity, and already finished
+    if( mbFinished )
+        return;
+
+    maViewData.emplace_back(rView );
+
+    ViewEntry& rEntry( maViewData.back() );
+    getEnteringBitmap( rEntry );
+    getLeavingBitmap( rEntry );
+    addSprites( rEntry );
+}
+
+void SlideChangeBase::viewRemoved( const UnoViewSharedPtr& rView )
+{
+    // we're a one-shot activity, and already finished
+    if( mbFinished )
+        return;
+
+    // erase corresponding entry from maViewData
+    maViewData.erase(
+        std::remove_if(
+            maViewData.begin(),
+            maViewData.end(),
+            [rView]( const ViewEntry& rViewEntry )
+            { return rView == rViewEntry.getView(); } ),
+        maViewData.end() );
+}
+
+void SlideChangeBase::viewChanged( const UnoViewSharedPtr& rView )
+{
+    // we're a one-shot activity, and already finished
+    if( mbFinished )
+        return;
+
+    // find entry corresponding to modified view
+    ViewsVecT::iterator aModifiedEntry(
+        std::find_if(
+            maViewData.begin(),
+            maViewData.end(),
+            [rView]( const ViewEntry& rViewEntry )
+            { return rView == rViewEntry.getView(); } ) );
+
+    OSL_ASSERT( aModifiedEntry != maViewData.end() );
+    if( aModifiedEntry == maViewData.end() )
+        return;
+
+    // clear stale info (both bitmaps and sprites prolly need a
+    // resize)
+    clearViewEntry( *aModifiedEntry );
+    addSprites( *aModifiedEntry );
+}
+
+void SlideChangeBase::viewsChanged()
+{
+    // we're a one-shot activity, and already finished
+    if( mbFinished )
+        return;
+
+    for( auto& rView : maViewData )
+    {
+        // clear stale info (both bitmaps and sprites prolly need a
+        // resize)
+        clearViewEntry( rView );
+        addSprites( rView );
+    }
+}
+
+cppcanvas::CustomSpriteSharedPtr SlideChangeBase::createSprite(
+    UnoViewSharedPtr const & pView,
+    basegfx::B2DSize const & rSpriteSize,
+    double                   nPrio ) const
+{
+    // TODO(P2): change to bitmapsprite once that's working
+    const cppcanvas::CustomSpriteSharedPtr pSprite(
+        pView->createSprite( rSpriteSize,
+                             nPrio ));
+
+    // alpha default is 0.0, which seems to be
+    // a bad idea when viewing content...
+    pSprite->setAlpha( 1.0 );
+    if (mbSpritesVisible)
+        pSprite->show();
+
+    return pSprite;
+}
+
+void SlideChangeBase::addSprites( ViewEntry& rEntry )
+{
+    if( mbCreateLeavingSprites && maLeavingSlide )
+    {
+        // create leaving sprite:
+        const basegfx::B2ISize leavingSlideSizePixel(
+            getLeavingBitmap( rEntry )->getSize() );
+
+        rEntry.mpOutSprite = createSprite( rEntry.mpView,
+                                           basegfx::B2DSize( leavingSlideSizePixel ),
+                                           100 );
+    }
+
+    if( mbCreateEnteringSprites )
+    {
+        // create entering sprite:
+        const basegfx::B2ISize enteringSlideSizePixel(
+            getSlideSizePixel( basegfx::B2DSize( mpEnteringSlide->getSlideSize() ),
+                               rEntry.mpView ));
+
+        rEntry.mpInSprite = createSprite( rEntry.mpView,
+                                          basegfx::B2DSize( enteringSlideSizePixel ),
+                                          101 );
+    }
+}
+
+void SlideChangeBase::clearViewEntry( ViewEntry& rEntry )
+{
+    // clear stale info (both bitmaps and sprites prolly need a
+    // resize)
+    rEntry.mpEnteringBitmap.reset();
+    rEntry.mpLeavingBitmap.reset();
+    rEntry.mpInSprite.reset();
+    rEntry.mpOutSprite.reset();
+}
+
+} // namespace presentation
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */