LCOV - code coverage report
Current view: top level - canvas/source/cairo - cairo_spritecanvashelper.cxx (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 0 221 0.0 %
Date: 2014-04-14 Functions: 0 23 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include <canvas/debug.hxx>
      21             : #include <canvas/verbosetrace.hxx>
      22             : #include <canvas/canvastools.hxx>
      23             : #include <tools/diagnose_ex.h>
      24             : 
      25             : #include <vcl/canvastools.hxx>
      26             : 
      27             : #include <comphelper/scopeguard.hxx>
      28             : 
      29             : #include <basegfx/range/b2drectangle.hxx>
      30             : #include <basegfx/tools/canvastools.hxx>
      31             : 
      32             : #include <boost/cast.hpp>
      33             : 
      34             : #include "cairo_spritecanvashelper.hxx"
      35             : #include "cairo_canvascustomsprite.hxx"
      36             : 
      37             : using namespace ::cairo;
      38             : using namespace ::com::sun::star;
      39             : 
      40             : namespace cairocanvas
      41             : {
      42             :     namespace
      43             :     {
      44             :         /** Sprite redraw at original position
      45             : 
      46             :             Used to repaint the whole canvas (background and all
      47             :             sprites)
      48             :          */
      49           0 :         void spriteRedraw( const CairoSharedPtr& pCairo,
      50             :                            const ::canvas::Sprite::Reference& rSprite )
      51             :         {
      52             :             // downcast to derived cairocanvas::Sprite interface, which
      53             :             // provides the actual redraw methods.
      54           0 :             ::boost::polymorphic_downcast< Sprite* >(rSprite.get())->redraw( pCairo, true);
      55           0 :         }
      56             : 
      57           0 :         void repaintBackground( const CairoSharedPtr&      pCairo,
      58             :                                 const SurfaceSharedPtr&    pBackgroundSurface,
      59             :                                 const ::basegfx::B2DRange& rArea )
      60             :         {
      61           0 :             cairo_save( pCairo.get() );
      62             :             cairo_rectangle( pCairo.get(), ceil( rArea.getMinX() ), ceil( rArea.getMinY() ),
      63           0 :                              floor( rArea.getWidth() ), floor( rArea.getHeight() ) );
      64           0 :             cairo_clip( pCairo.get() );
      65           0 :             cairo_set_source_surface( pCairo.get(), pBackgroundSurface->getCairoSurface().get(), 0, 0 );
      66           0 :             cairo_set_operator( pCairo.get(), CAIRO_OPERATOR_SOURCE );
      67           0 :             cairo_paint( pCairo.get() );
      68           0 :             cairo_restore( pCairo.get() );
      69           0 :         }
      70             : 
      71           0 :         void opaqueUpdateSpriteArea( const ::canvas::Sprite::Reference& rSprite,
      72             :                                      const CairoSharedPtr&              pCairo,
      73             :                                      const ::basegfx::B2IRange&         rArea )
      74             :         {
      75             :             // clip output to actual update region (otherwise a)
      76             :             // wouldn't save much render time, and b) will clutter
      77             :             // scrolled sprite content outside this area)
      78           0 :             cairo_save( pCairo.get() );
      79           0 :             cairo_rectangle( pCairo.get(), rArea.getMinX(), rArea.getMinY(),
      80           0 :                              sal::static_int_cast<sal_Int32>(rArea.getWidth()),
      81           0 :                              sal::static_int_cast<sal_Int32>(rArea.getHeight()) );
      82           0 :             cairo_clip( pCairo.get() );
      83             : 
      84             :             // repaint affected sprite directly to output device (at
      85             :             // the actual screen output position)
      86             :             // rendering directly to device buffer
      87           0 :             ::boost::polymorphic_downcast< Sprite* >( rSprite.get() )->redraw( pCairo, false );
      88             : 
      89           0 :             cairo_restore( pCairo.get() );
      90           0 :         }
      91             : 
      92             :         /** Repaint sprite at original position
      93             : 
      94             :             Used for opaque updates, which render directly to the
      95             :             device buffer.
      96             :          */
      97           0 :         void spriteRedrawStub( const CairoSharedPtr& pCairo,
      98             :                                const ::canvas::Sprite::Reference& rSprite )
      99             :         {
     100           0 :             if( rSprite.is() )
     101             :             {
     102           0 :                 ::boost::polymorphic_downcast< Sprite* >( rSprite.get() )->redraw( pCairo, false );
     103             :             }
     104           0 :         }
     105             : 
     106             :         /** Repaint sprite at given position
     107             : 
     108             :             Used for generic update, which renders into device buffer.
     109             :          */
     110           0 :         void spriteRedrawStub2( const CairoSharedPtr& pCairo,
     111             :                                 const ::canvas::Sprite::Reference&  rSprite )
     112             :         {
     113           0 :             if( rSprite.is() )
     114             :             {
     115           0 :                 ::boost::polymorphic_downcast< Sprite* >( rSprite.get() )->redraw( pCairo, true );
     116             :             }
     117           0 :         }
     118             : 
     119             :         /** Repaint sprite at original position
     120             : 
     121             :             Used for opaque updates from scrollUpdate(), which render
     122             :             directly to the front buffer.
     123             :          */
     124           0 :         void spriteRedrawStub3( const CairoSharedPtr& pCairo,
     125             :                                 const ::canvas::SpriteRedrawManager::AreaComponent& rComponent )
     126             :         {
     127           0 :             const ::canvas::Sprite::Reference& rSprite( rComponent.second.getSprite() );
     128             : 
     129           0 :             if( rSprite.is() )
     130           0 :                 ::boost::polymorphic_downcast< Sprite* >( rSprite.get() )->redraw( pCairo, false );
     131           0 :         }
     132             :     }
     133             : 
     134           0 :     SpriteCanvasHelper::SpriteCanvasHelper() :
     135             :         mpRedrawManager( NULL ),
     136             :         mpOwningSpriteCanvas( NULL ),
     137             :         mpCompositingSurface(),
     138             :         maCompositingSurfaceSize(),
     139           0 :         mbCompositingSurfaceDirty(true)
     140             :     {
     141           0 :     }
     142             : 
     143           0 :     void SpriteCanvasHelper::init( ::canvas::SpriteRedrawManager& rManager,
     144             :                                    SpriteCanvas&                  rDevice,
     145             :                                    const ::basegfx::B2ISize&      rSize )
     146             :     {
     147           0 :         mpRedrawManager = &rManager;
     148           0 :         mpOwningSpriteCanvas = &rDevice;
     149             : 
     150           0 :         CanvasHelper::init( rSize, rDevice, &rDevice );
     151           0 :     }
     152             : 
     153           0 :     void SpriteCanvasHelper::disposing()
     154             :     {
     155           0 :         mpCompositingSurface.reset();
     156           0 :         mpOwningSpriteCanvas = NULL;
     157           0 :         mpRedrawManager = NULL;
     158             : 
     159             :         // forward to base
     160           0 :         CanvasHelper::disposing();
     161           0 :     }
     162             : 
     163           0 :     uno::Reference< rendering::XAnimatedSprite > SpriteCanvasHelper::createSpriteFromAnimation(
     164             :         const uno::Reference< rendering::XAnimation >& )
     165             :     {
     166           0 :         return uno::Reference< rendering::XAnimatedSprite >();
     167             :     }
     168             : 
     169           0 :     uno::Reference< rendering::XAnimatedSprite > SpriteCanvasHelper::createSpriteFromBitmaps(
     170             :         const uno::Sequence< uno::Reference< rendering::XBitmap > >& /*animationBitmaps*/,
     171             :         sal_Int8                                                     /*interpolationMode*/ )
     172             :     {
     173           0 :         return uno::Reference< rendering::XAnimatedSprite >();
     174             :     }
     175             : 
     176           0 :     uno::Reference< rendering::XCustomSprite > SpriteCanvasHelper::createCustomSprite( const geometry::RealSize2D& spriteSize )
     177             :     {
     178           0 :         if( !mpRedrawManager )
     179           0 :             return uno::Reference< rendering::XCustomSprite >(); // we're disposed
     180             : 
     181             :         return uno::Reference< rendering::XCustomSprite >(
     182             :             new CanvasCustomSprite( spriteSize,
     183           0 :                                     mpOwningSpriteCanvas ) );
     184             :     }
     185             : 
     186           0 :     uno::Reference< rendering::XSprite > SpriteCanvasHelper::createClonedSprite(
     187             :         const uno::Reference< rendering::XSprite >& )
     188             :     {
     189           0 :         return uno::Reference< rendering::XSprite >();
     190             :     }
     191             : 
     192           0 :     sal_Bool SpriteCanvasHelper::updateScreen( const ::basegfx::B2IRange& /*rCurrArea*/,
     193             :                                                sal_Bool                   bUpdateAll,
     194             :                                                bool&                      io_bSurfaceDirty )
     195             :     {
     196           0 :         if( !mpRedrawManager ||
     197           0 :             !mpOwningSpriteCanvas ||
     198           0 :             !mpOwningSpriteCanvas->getWindowSurface() ||
     199           0 :             !mpOwningSpriteCanvas->getBufferSurface() )
     200             :         {
     201           0 :             return sal_False; // disposed, or otherwise dysfunctional
     202             :         }
     203             : 
     204             :         SAL_INFO("canvas.cairo", "SpriteCanvasHelper::updateScreen called");
     205             : 
     206           0 :         const ::basegfx::B2ISize& rSize = mpOwningSpriteCanvas->getSizePixel();
     207             : 
     208             :         // force compositing surface to be available before using it
     209             :         // inside forEachSpriteArea
     210           0 :         SurfaceSharedPtr pCompositingSurface = getCompositingSurface(rSize);
     211           0 :         SurfaceSharedPtr pWindowSurface = mpOwningSpriteCanvas->getWindowSurface();
     212           0 :         CairoSharedPtr pCompositingCairo = pCompositingSurface->getCairo();
     213           0 :         CairoSharedPtr pWindowCairo = pWindowSurface->getCairo();
     214             : 
     215             :         // TODO(P1): Might be worthwile to track areas of background
     216             :         // changes, too.
     217           0 :         if( !bUpdateAll && !io_bSurfaceDirty && !mbCompositingSurfaceDirty )
     218             :         {
     219             :             // background has not changed, so we're free to optimize
     220             :             // repaint to areas where a sprite has changed
     221             : 
     222             :             // process each independent area of overlapping sprites
     223             :             // separately.
     224           0 :             mpRedrawManager->forEachSpriteArea( *this );
     225             :         }
     226             :         else
     227             :         {
     228             :             SAL_INFO("canvas.cairo", "SpriteCanvasHelper::updateScreen update ALL");
     229             : 
     230             :             // background has changed, so we currently have no choice
     231             :             // but repaint everything (or caller requested that)
     232             : 
     233           0 :             cairo_rectangle( pCompositingCairo.get(), 0, 0, rSize.getX(), rSize.getY() );
     234           0 :             cairo_clip( pCompositingCairo.get() );
     235           0 :             cairo_save( pCompositingCairo.get() );
     236             :             cairo_set_source_surface( pCompositingCairo.get(),
     237           0 :                                       mpOwningSpriteCanvas->getBufferSurface()->getCairoSurface().get(),
     238           0 :                                       0, 0 );
     239           0 :             cairo_set_operator( pCompositingCairo.get(), CAIRO_OPERATOR_SOURCE );
     240           0 :             cairo_paint( pCompositingCairo.get() );
     241           0 :             cairo_restore( pCompositingCairo.get() );
     242             : 
     243             :             // repaint all active sprites on top of background into
     244             :             // VDev.
     245             :             mpRedrawManager->forEachSprite(
     246             :                 ::boost::bind(
     247             :                     &spriteRedraw,
     248             :                     boost::cref(pCompositingCairo),
     249           0 :                     _1 ) );
     250             : 
     251             :             // flush to screen
     252           0 :             cairo_rectangle( pWindowCairo.get(), 0, 0, rSize.getX(), rSize.getY() );
     253           0 :             cairo_clip( pWindowCairo.get() );
     254             :             cairo_set_source_surface( pWindowCairo.get(),
     255           0 :                                       pCompositingSurface->getCairoSurface().get(),
     256           0 :                                       0, 0 );
     257           0 :             cairo_set_operator( pWindowCairo.get(), CAIRO_OPERATOR_SOURCE );
     258           0 :             cairo_paint( pWindowCairo.get() );
     259             :         }
     260             : 
     261             :         // change record vector must be cleared, for the next turn of
     262             :         // rendering and sprite changing
     263           0 :         mpRedrawManager->clearChangeRecords();
     264             : 
     265           0 :         mbCompositingSurfaceDirty = false;
     266           0 :         io_bSurfaceDirty = false;
     267             : 
     268             :         // commit to screen
     269           0 :         mpOwningSpriteCanvas->flush();
     270             : 
     271           0 :         return sal_True;
     272             :     }
     273             : 
     274           0 :     void SpriteCanvasHelper::backgroundPaint( const ::basegfx::B2DRange& rUpdateRect )
     275             :     {
     276           0 :         if( mpOwningSpriteCanvas && mpCompositingSurface )
     277           0 :             repaintBackground( mpCompositingSurface->getCairo(),
     278             :                                mpOwningSpriteCanvas->getBufferSurface(),
     279           0 :                                rUpdateRect );
     280           0 :     }
     281             : 
     282           0 :     void SpriteCanvasHelper::scrollUpdate( const ::basegfx::B2DRange&                       rMoveStart,
     283             :                                            const ::basegfx::B2DRange&                       rMoveEnd,
     284             :                                            const ::canvas::SpriteRedrawManager::UpdateArea& rUpdateArea )
     285             :     {
     286           0 :         ENSURE_OR_THROW( mpOwningSpriteCanvas &&
     287             :                           mpOwningSpriteCanvas->getBufferSurface(),
     288             :                           "SpriteCanvasHelper::scrollUpdate(): NULL device pointer " );
     289             : 
     290             :         SAL_INFO("canvas.cairo", "SpriteCanvasHelper::scrollUpdate called");
     291             : 
     292           0 :         const ::basegfx::B2ISize& rSize = mpOwningSpriteCanvas->getSizePixel();
     293             :         const ::basegfx::B2IRange  aOutputBounds( 0,0,
     294             :                                                   rSize.getX(),
     295           0 :                                                   rSize.getY() );
     296             : 
     297           0 :         SurfaceSharedPtr pCompositingSurface = getCompositingSurface(rSize);
     298           0 :         SurfaceSharedPtr pWindowSurface = mpOwningSpriteCanvas->getWindowSurface();
     299           0 :         CairoSharedPtr pCompositingCairo = pCompositingSurface->getCairo();
     300           0 :         CairoSharedPtr pWindowCairo = pWindowSurface->getCairo();
     301             : 
     302             :         // round rectangles to integer pixel. Note: have to be
     303             :         // extremely careful here, to avoid off-by-one errors for
     304             :         // the destination area: otherwise, the next scroll update
     305             :         // would copy pixel that are not supposed to be part of
     306             :         // the sprite.
     307             :         ::basegfx::B2IRange aSourceRect(
     308           0 :             ::canvas::tools::spritePixelAreaFromB2DRange( rMoveStart ) );
     309             :         const ::basegfx::B2IRange& rDestRect(
     310           0 :             ::canvas::tools::spritePixelAreaFromB2DRange( rMoveEnd ) );
     311           0 :         ::basegfx::B2IPoint aDestPos( rDestRect.getMinimum() );
     312             : 
     313           0 :         ::std::vector< ::basegfx::B2IRange > aUnscrollableAreas;
     314             : 
     315             :         // TODO(E3): This is plain buggy (but copies the behaviour of
     316             :         // the old Impress slideshow) - the scrolled area might
     317             :         // actually lie _below_ another window!
     318             : 
     319             :         // clip to output bounds (cannot properly scroll stuff
     320             :         // _outside_ our screen area)
     321           0 :         if( !::canvas::tools::clipScrollArea( aSourceRect,
     322             :                                               aDestPos,
     323             :                                               aUnscrollableAreas,
     324           0 :                                               aOutputBounds ) )
     325             :         {
     326             :             // fully clipped scroll area: cannot simply scroll
     327             :             // then. Perform normal opaque update (can use that, since
     328             :             // one of the preconditions for scrollable update is
     329             :             // opaque sprite content)
     330             : 
     331             :             // repaint all affected sprites directly to output device
     332             :             ::std::for_each( rUpdateArea.maComponentList.begin(),
     333             :                              rUpdateArea.maComponentList.end(),
     334             :                              ::boost::bind(
     335             :                                  &spriteRedrawStub3,
     336             :                                  boost::cref(pCompositingCairo),
     337           0 :                                  _1 ) );
     338             :         }
     339             :         else
     340             :         {
     341           0 :             const ::basegfx::B2IVector aSourceUpperLeftPos( aSourceRect.getMinimum() );
     342             : 
     343             :             // clip dest area (which must be inside rDestBounds)
     344           0 :             ::basegfx::B2IRange aDestRect( rDestRect );
     345           0 :             aDestRect.intersect( aOutputBounds );
     346             : 
     347           0 :             ::basegfx::B2ISize aScrollSize( aDestRect.getWidth(), aDestRect.getHeight() );
     348           0 :             SurfaceSharedPtr pScrollSurface( getTemporarySurface() );
     349           0 :             CairoSharedPtr pScrollCairo( pScrollSurface->getCairo() );
     350             : 
     351           0 :             cairo_save( pScrollCairo.get() );
     352             :             // scroll the current content of the compositing surface (and,
     353             :             // thus, of the window) in temp. surface
     354             :             cairo_set_source_surface( pScrollCairo.get(),
     355           0 :                                       pCompositingSurface->getCairoSurface().get(),
     356           0 :                                       aDestPos.getX() - aSourceUpperLeftPos.getX(),
     357           0 :                                       aDestPos.getY() - aSourceUpperLeftPos.getY() );
     358             :             cairo_rectangle( pScrollCairo.get(),
     359           0 :                     aDestPos.getX(), aDestPos.getY(),
     360           0 :                     aScrollSize.getX(), aScrollSize.getY() );
     361           0 :             cairo_clip( pScrollCairo.get() );
     362           0 :             cairo_set_operator( pScrollCairo.get(), CAIRO_OPERATOR_SOURCE );
     363           0 :             cairo_paint( pScrollCairo.get() );
     364           0 :             cairo_restore( pScrollCairo.get() );
     365             : 
     366           0 :             cairo_save( pCompositingCairo.get() );
     367             :             // copy the scrolled area back onto the compositing surface
     368             :             cairo_set_source_surface( pCompositingCairo.get(),
     369           0 :                                       pScrollSurface->getCairoSurface().get(),
     370           0 :                                       0, 0 );
     371             :             cairo_rectangle( pCompositingCairo.get(),
     372           0 :                              aDestPos.getX(), aDestPos.getY(),
     373           0 :                              aScrollSize.getX(), aScrollSize.getY() );
     374           0 :             cairo_clip( pCompositingCairo.get() );
     375           0 :             cairo_set_operator( pCompositingCairo.get(), CAIRO_OPERATOR_SOURCE );
     376           0 :             cairo_paint( pCompositingCairo.get() );
     377           0 :             cairo_restore( pCompositingCairo.get() );
     378             : 
     379             :             const ::canvas::SpriteRedrawManager::SpriteConnectedRanges::ComponentListType::const_iterator
     380           0 :                 aFirst( rUpdateArea.maComponentList.begin() );
     381             :             ::canvas::SpriteRedrawManager::SpriteConnectedRanges::ComponentListType::const_iterator
     382           0 :                   aSecond( aFirst ); ++aSecond;
     383             : 
     384           0 :             ENSURE_OR_THROW( aFirst->second.getSprite().is(),
     385             :                              "VCLCanvas::scrollUpdate(): no sprite" );
     386             : 
     387             :             // repaint uncovered areas from sprite. Need to actually
     388             :             // clip here, since we're only repainting _parts_ of the
     389             :             // sprite
     390             :             ::std::for_each( aUnscrollableAreas.begin(),
     391             :                              aUnscrollableAreas.end(),
     392             :                              ::boost::bind( &opaqueUpdateSpriteArea,
     393           0 :                                             ::boost::cref(aFirst->second.getSprite()),
     394             :                                             boost::cref(pCompositingCairo),
     395           0 :                                             _1 ) );
     396             :         }
     397             : 
     398             :         // repaint uncovered areas from backbuffer - take the
     399             :         // _rounded_ rectangles from above, to have the update
     400             :         // consistent with the scroll above.
     401           0 :         ::std::vector< ::basegfx::B2DRange > aUncoveredAreas;
     402             :         ::basegfx::computeSetDifference( aUncoveredAreas,
     403             :                                          rUpdateArea.maTotalBounds,
     404           0 :                                          ::basegfx::B2DRange( rDestRect ) );
     405             :         ::std::for_each( aUncoveredAreas.begin(),
     406             :                          aUncoveredAreas.end(),
     407             :                          ::boost::bind( &repaintBackground,
     408             :                                         boost::cref(pCompositingCairo),
     409             :                                         boost::cref(mpOwningSpriteCanvas->getBufferSurface()),
     410           0 :                                         _1 ) );
     411             : 
     412           0 :         cairo_rectangle( pWindowCairo.get(), 0, 0, rSize.getX(), rSize.getY() );
     413           0 :         cairo_clip( pWindowCairo.get() );
     414             :         cairo_set_source_surface( pWindowCairo.get(),
     415           0 :                                   pCompositingSurface->getCairoSurface().get(),
     416           0 :                                   0, 0 );
     417           0 :         cairo_set_operator( pWindowCairo.get(), CAIRO_OPERATOR_SOURCE );
     418           0 :         cairo_paint( pWindowCairo.get() );
     419           0 :     }
     420             : 
     421           0 :     void SpriteCanvasHelper::opaqueUpdate( const ::basegfx::B2DRange&                          rTotalArea,
     422             :                                            const ::std::vector< ::canvas::Sprite::Reference >& rSortedUpdateSprites )
     423             :     {
     424           0 :         ENSURE_OR_THROW( mpOwningSpriteCanvas &&
     425             :                           mpOwningSpriteCanvas->getBufferSurface(),
     426             :                           "SpriteCanvasHelper::opaqueUpdate(): NULL device pointer " );
     427             : 
     428             :         SAL_INFO("canvas.cairo", "SpriteCanvasHelper::opaqueUpdate called");
     429             : 
     430           0 :         const ::basegfx::B2ISize& rDeviceSize = mpOwningSpriteCanvas->getSizePixel();
     431             : 
     432           0 :         SurfaceSharedPtr pCompositingSurface = getCompositingSurface(rDeviceSize);
     433           0 :         SurfaceSharedPtr pWindowSurface = mpOwningSpriteCanvas->getWindowSurface();
     434           0 :         CairoSharedPtr pCompositingCairo = pCompositingSurface->getCairo();
     435           0 :         CairoSharedPtr pWindowCairo = pWindowSurface->getCairo();
     436             : 
     437           0 :         cairo_rectangle( pCompositingCairo.get(), 0, 0, rDeviceSize.getX(), rDeviceSize.getY() );
     438           0 :         cairo_clip( pCompositingCairo.get() );
     439             : 
     440           0 :         ::basegfx::B2DVector aPos( ceil( rTotalArea.getMinX() ), ceil( rTotalArea.getMinY() ) );
     441           0 :         ::basegfx::B2DVector aSize( floor( rTotalArea.getMaxX() - aPos.getX() ), floor( rTotalArea.getMaxY() - aPos.getY() ) );
     442             : 
     443           0 :         cairo_rectangle( pCompositingCairo.get(), aPos.getX(), aPos.getY(), aSize.getX(), aSize.getY() );
     444           0 :         cairo_clip( pCompositingCairo.get() );
     445             : 
     446             :         // repaint all affected sprites directly to output device
     447             :         ::std::for_each( rSortedUpdateSprites.begin(),
     448             :                          rSortedUpdateSprites.end(),
     449             :                          ::boost::bind(
     450             :                              &spriteRedrawStub,
     451             :                              boost::cref(pCompositingCairo),
     452           0 :                              _1 ) );
     453             : 
     454             :         // flush to screen
     455           0 :         cairo_rectangle( pWindowCairo.get(), 0, 0, rDeviceSize.getX(), rDeviceSize.getY() );
     456           0 :         cairo_clip( pWindowCairo.get() );
     457           0 :         cairo_rectangle( pWindowCairo.get(), aPos.getX(), aPos.getY(), aSize.getX(), aSize.getY() );
     458           0 :         cairo_clip( pWindowCairo.get() );
     459             :         cairo_set_source_surface( pWindowCairo.get(),
     460           0 :                                   pCompositingSurface->getCairoSurface().get(),
     461           0 :                                   0, 0 );
     462           0 :         cairo_set_operator( pWindowCairo.get(), CAIRO_OPERATOR_SOURCE );
     463           0 :         cairo_paint( pWindowCairo.get() );
     464           0 :     }
     465             : 
     466           0 :     void SpriteCanvasHelper::genericUpdate( const ::basegfx::B2DRange&                          rRequestedArea,
     467             :                                             const ::std::vector< ::canvas::Sprite::Reference >& rSortedUpdateSprites )
     468             :     {
     469             :         // TODO
     470             :         SAL_INFO("canvas.cairo", "SpriteCanvasHelper::genericUpdate called");
     471             : 
     472           0 :         ENSURE_OR_THROW( mpOwningSpriteCanvas &&
     473             :                          mpOwningSpriteCanvas->getBufferSurface(),
     474             :                          "SpriteCanvasHelper::genericUpdate(): NULL device pointer " );
     475             : 
     476             :         // limit size of update VDev to target outdev's size
     477           0 :         const ::basegfx::B2ISize& rSize = mpOwningSpriteCanvas->getSizePixel();
     478             : 
     479           0 :         SurfaceSharedPtr pCompositingSurface = getCompositingSurface(rSize);
     480           0 :         SurfaceSharedPtr pWindowSurface = mpOwningSpriteCanvas->getWindowSurface();
     481           0 :         CairoSharedPtr pCompositingCairo = pCompositingSurface->getCairo();
     482           0 :         CairoSharedPtr pWindowCairo = pWindowSurface->getCairo();
     483             : 
     484             :         // round output position towards zero. Don't want to truncate
     485             :         // a fraction of a sprite pixel...  Clip position at origin,
     486             :         // otherwise, truncation of size below might leave visible
     487             :         // areas uncovered by VDev.
     488             :         const Point aOutputPosition(
     489             :             ::std::max( sal_Int32( 0 ),
     490           0 :                         static_cast< sal_Int32 >(rRequestedArea.getMinX()) ),
     491             :             ::std::max( sal_Int32( 0 ),
     492           0 :                         static_cast< sal_Int32 >(rRequestedArea.getMinY()) ) );
     493             :         // round output size towards +infty. Don't want to truncate a
     494             :         // fraction of a sprite pixel... Limit size of VDev to output
     495             :         // device's area.
     496             :         const Size  aOutputSize(
     497           0 :             ::std::min( rSize.getX(),
     498           0 :                         ::canvas::tools::roundUp( rRequestedArea.getMaxX() - aOutputPosition.X()) ),
     499           0 :             ::std::min( rSize.getY(),
     500           0 :                         ::canvas::tools::roundUp( rRequestedArea.getMaxY() - aOutputPosition.Y()) ) );
     501             : 
     502           0 :         cairo_rectangle( pCompositingCairo.get(), aOutputPosition.X(), aOutputPosition.Y(), aOutputSize.Width(), aOutputSize.Height() );
     503           0 :         cairo_clip( pCompositingCairo.get() );
     504             : 
     505             :         // paint background
     506           0 :         cairo_save( pCompositingCairo.get() );
     507             :         cairo_set_source_surface( pCompositingCairo.get(),
     508           0 :                                   mpOwningSpriteCanvas->getBufferSurface()->getCairoSurface().get(),
     509           0 :                                   0, 0 );
     510           0 :         cairo_set_operator( pCompositingCairo.get(), CAIRO_OPERATOR_SOURCE );
     511           0 :         cairo_paint( pCompositingCairo.get() );
     512           0 :         cairo_restore( pCompositingCairo.get() );
     513             : 
     514             :         // repaint all affected sprites on top of background into
     515             :         // VDev.
     516             :         ::std::for_each( rSortedUpdateSprites.begin(),
     517             :                          rSortedUpdateSprites.end(),
     518             :                          ::boost::bind( &spriteRedrawStub2,
     519             :                                         boost::cref(pCompositingCairo),
     520           0 :                                         _1 ) );
     521             : 
     522             :         // flush to screen
     523           0 :         cairo_rectangle( pWindowCairo.get(), aOutputPosition.X(), aOutputPosition.Y(), aOutputSize.Width(), aOutputSize.Height() );
     524           0 :         cairo_clip( pWindowCairo.get() );
     525             :         cairo_set_source_surface( pWindowCairo.get(),
     526           0 :                                   pCompositingSurface->getCairoSurface().get(),
     527           0 :                                   0, 0 );
     528           0 :         cairo_set_operator( pWindowCairo.get(), CAIRO_OPERATOR_SOURCE );
     529           0 :         cairo_paint( pWindowCairo.get() );
     530           0 :     }
     531             : 
     532           0 :     ::cairo::SurfaceSharedPtr SpriteCanvasHelper::getCompositingSurface( const ::basegfx::B2ISize& rNeededSize )
     533             :     {
     534           0 :         if( rNeededSize.getX() > maCompositingSurfaceSize.getX() ||
     535           0 :             rNeededSize.getY() > maCompositingSurfaceSize.getY() )
     536             :         {
     537             :             // need to give buffer more size
     538           0 :             mpCompositingSurface.reset();
     539             :         }
     540             : 
     541           0 :         if( !mpCompositingSurface )
     542             :         {
     543           0 :             mpCompositingSurface = createSurface( rNeededSize );
     544           0 :             maCompositingSurfaceSize = rNeededSize;
     545           0 :             mbCompositingSurfaceDirty = true;
     546           0 :             mpTemporarySurface.reset();
     547             :         }
     548             : 
     549           0 :         return mpCompositingSurface;
     550             :     }
     551             : 
     552           0 :     ::cairo::SurfaceSharedPtr SpriteCanvasHelper::getTemporarySurface()
     553             :     {
     554           0 :         if ( !mpTemporarySurface )
     555           0 :             mpTemporarySurface = createSurface( maCompositingSurfaceSize );
     556           0 :         return mpTemporarySurface;
     557             :     }
     558             : 
     559           0 :     ::cairo::SurfaceSharedPtr SpriteCanvasHelper::createSurface( const ::basegfx::B2ISize& rNeededSize ) const
     560             :     {
     561           0 :         return mpOwningSpriteCanvas->getWindowSurface()->getSimilar(
     562             :                     CAIRO_CONTENT_COLOR,
     563           0 :                     rNeededSize.getX(), rNeededSize.getY() );
     564             :     }
     565           0 : }
     566             : 
     567             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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