1 files changed, 210 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/combtransition.cxx b/slideshow/source/engine/transitions/combtransition.cxx
new file mode 100644
index 000000000000..a222592b7d8d
--- /dev/null
+++ b/slideshow/source/engine/transitions/combtransition.cxx
@@ -0,0 +1,210 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * $RCSfile: combtransition.cxx,v $
+ * $Revision: 1.9 $
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_slideshow.hxx"
+
+#include <canvas/debug.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+
+#include <cppcanvas/spritecanvas.hxx>
+
+#include "combtransition.hxx"
+
+#include <boost/bind.hpp>
+
+
+namespace slideshow {
+namespace 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::tools::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;
+
+    aMatrix.translate( -0.5, -0.5 );
+    aMatrix.rotate( aUpVec.angle( rDirection ) );
+    aMatrix.translate( 0.5, 0.5 );
+
+    // blow up clip polygon to slide size
+    aMatrix.scale( rSlideSize.getX(),
+                   rSlideSize.getY() );
+
+    aClipPoly.transform( aMatrix );
+
+    return aClipPoly;
+}
+
+}
+
+CombTransition::CombTransition(
+    boost::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::B2DHomMatrix transform;
+    basegfx::B2DPoint p;
+
+    // TODO(Q2): Use basegfx bitmaps here
+    // TODO(F1): SlideBitmap is not fully portable between different canvases!
+
+    const basegfx::B2DSize enteringSizePixel(
+        getEnteringSlideSizePixel( rViewEntry.mpView) );
+
+    const basegfx::B2DVector aPushDirection = basegfx::B2DVector(
+        enteringSizePixel * maPushDirectionUnit );
+    const basegfx::B2DPolyPolygon aClipPolygon1 = basegfx::B2DPolyPolygon(
+        createClipPolygon( maPushDirectionUnit,
+                           enteringSizePixel,
+                           mnNumStripes, 0 ) );
+    const basegfx::B2DPolyPolygon aClipPolygon2 = basegfx::B2DPolyPolygon(
+        createClipPolygon( maPushDirectionUnit,
+                           enteringSizePixel,
+                           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) );
+        transform.translate( p.getX(), p.getY() );
+        pCanvas->setTransformation( transform );
+        pLeavingBitmap->draw( pCanvas );
+
+        // render even strips:
+        pLeavingBitmap->clip( aClipPolygon2 );
+        // don't modify bitmap object (no move!):
+        transform.identity();
+        p = basegfx::B2DPoint( pageOrigin - (t * aPushDirection) );
+        transform.translate( p.getX(), p.getY() );
+        pCanvas->setTransformation( transform );
+        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!):
+    transform.identity();
+    p = basegfx::B2DPoint( pageOrigin + ((t - 1.0) * aPushDirection) );
+    transform.translate( p.getX(), p.getY() );
+    pCanvas->setTransformation( transform );
+    pEnteringBitmap->draw( pCanvas );
+
+    // render even strips:
+    pEnteringBitmap->clip( aClipPolygon2 );
+    // don't modify bitmap object (no move!):
+    transform.identity();
+    p = basegfx::B2DPoint( pageOrigin + ((1.0 - t) * aPushDirection) );
+    transform.translate( p.getX(), p.getY() );
+    pCanvas->setTransformation( transform );
+    pEnteringBitmap->draw( pCanvas );
+}
+
+bool CombTransition::operator()( double t )
+{
+    std::for_each( beginViews(),
+                   endViews(),
+                   boost::bind( &CombTransition::renderComb,
+                                this,
+                                t,
+                                _1 ));
+
+    getScreenUpdater().notifyUpdate();
+
+    return true;
+}
+
+} // namespace internal
+} // namespace presentation