LCOV - code coverage report
Current view: top level - slideshow/source/engine/shapes - viewshape.cxx (source / functions) Hit Total Coverage
Test: commit c8344322a7af75b84dd3ca8f78b05543a976dfd5 Lines: 1 231 0.4 %
Date: 2015-06-13 12:38:46 Functions: 2 17 11.8 %
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             : 
      21             : // must be first
      22             : #include <canvas/debug.hxx>
      23             : #include <tools/diagnose_ex.h>
      24             : 
      25             : #include <math.h>
      26             : 
      27             : #include <rtl/math.hxx>
      28             : 
      29             : #include <com/sun/star/rendering/XCanvas.hpp>
      30             : #include <com/sun/star/rendering/XIntegerBitmap.hpp>
      31             : #include <com/sun/star/rendering/PanoseLetterForm.hpp>
      32             : #include <com/sun/star/awt/FontSlant.hpp>
      33             : 
      34             : #include <cppuhelper/exc_hlp.hxx>
      35             : #include <comphelper/anytostring.hxx>
      36             : 
      37             : #include <basegfx/polygon/b2dpolygontools.hxx>
      38             : #include <basegfx/numeric/ftools.hxx>
      39             : #include <basegfx/matrix/b2dhommatrix.hxx>
      40             : #include <basegfx/matrix/b2dhommatrixtools.hxx>
      41             : 
      42             : #include <canvas/verbosetrace.hxx>
      43             : #include <canvas/canvastools.hxx>
      44             : #include <cppcanvas/vclfactory.hxx>
      45             : #include <cppcanvas/basegfxfactory.hxx>
      46             : 
      47             : #include "viewshape.hxx"
      48             : #include "tools.hxx"
      49             : 
      50             : #include <boost/bind.hpp>
      51             : 
      52             : 
      53             : using namespace ::com::sun::star;
      54             : 
      55             : namespace slideshow
      56             : {
      57             :     namespace internal
      58             :     {
      59             : 
      60             :         // TODO(F2): Provide sensible setup for mtf-related attributes (fill mode,
      61             :         // char rotation etc.). Do that via mtf argument at this object
      62             : 
      63           0 :         bool ViewShape::prefetch( RendererCacheEntry&                   io_rCacheEntry,
      64             :                                   const ::cppcanvas::CanvasSharedPtr&   rDestinationCanvas,
      65             :                                   const GDIMetaFileSharedPtr&           rMtf,
      66             :                                   const ShapeAttributeLayerSharedPtr&   rAttr )
      67             :         {
      68           0 :             ENSURE_OR_RETURN_FALSE( rMtf,
      69             :                                "ViewShape::prefetch(): no valid metafile!" );
      70             : 
      71           0 :             if( rMtf != io_rCacheEntry.mpMtf ||
      72           0 :                 rDestinationCanvas != io_rCacheEntry.getDestinationCanvas() )
      73             :             {
      74             :                 // buffered renderer invalid, re-create
      75           0 :                 ::cppcanvas::Renderer::Parameters aParms;
      76             : 
      77             :                 // rendering attribute override parameter struct.  For
      78             :                 // every valid attribute, the corresponding struct
      79             :                 // member is filled, which in the metafile renderer
      80             :                 // forces rendering with the given attribute.
      81           0 :                 if( rAttr )
      82             :                 {
      83           0 :                     if( rAttr->isFillColorValid() )
      84             :                     {
      85             :                         // convert RGBColor to RGBA32 integer. Note
      86             :                         // that getIntegerColor() also truncates
      87             :                         // out-of-range values appropriately
      88           0 :                         aParms.maFillColor =
      89           0 :                             rAttr->getFillColor().getIntegerColor();
      90             :                     }
      91           0 :                     if( rAttr->isLineColorValid() )
      92             :                     {
      93             :                         // convert RGBColor to RGBA32 integer. Note
      94             :                         // that getIntegerColor() also truncates
      95             :                         // out-of-range values appropriately
      96           0 :                         aParms.maLineColor =
      97           0 :                             rAttr->getLineColor().getIntegerColor();
      98             :                     }
      99           0 :                     if( rAttr->isCharColorValid() )
     100             :                     {
     101             :                         // convert RGBColor to RGBA32 integer. Note
     102             :                         // that getIntegerColor() also truncates
     103             :                         // out-of-range values appropriately
     104           0 :                         aParms.maTextColor =
     105           0 :                             rAttr->getCharColor().getIntegerColor();
     106             :                     }
     107           0 :                     if( rAttr->isDimColorValid() )
     108             :                     {
     109             :                         // convert RGBColor to RGBA32 integer. Note
     110             :                         // that getIntegerColor() also truncates
     111             :                         // out-of-range values appropriately
     112             : 
     113             :                         // dim color overrides all other colors
     114             :                         aParms.maFillColor =
     115           0 :                         aParms.maLineColor =
     116           0 :                         aParms.maTextColor =
     117           0 :                             rAttr->getDimColor().getIntegerColor();
     118             :                     }
     119           0 :                     if( rAttr->isFontFamilyValid() )
     120             :                     {
     121           0 :                         aParms.maFontName =
     122           0 :                             rAttr->getFontFamily();
     123             :                     }
     124           0 :                     if( rAttr->isCharScaleValid() )
     125             :                     {
     126           0 :                         ::basegfx::B2DHomMatrix aMatrix;
     127             : 
     128             :                         // enlarge text by given scale factor. Do that
     129             :                         // with the middle of the shape as the center
     130             :                         // of scaling.
     131           0 :                         aMatrix.translate( -0.5, -0.5 );
     132             :                         aMatrix.scale( rAttr->getCharScale(),
     133           0 :                                        rAttr->getCharScale() );
     134           0 :                         aMatrix.translate( 0.5, 0.5 );
     135             : 
     136           0 :                         aParms.maTextTransformation = aMatrix;
     137             :                     }
     138           0 :                     if( rAttr->isCharWeightValid() )
     139             :                     {
     140           0 :                         aParms.maFontWeight =
     141             :                             static_cast< sal_Int8 >(
     142             :                                 ::basegfx::fround(
     143             :                                     ::std::max( 0.0,
     144             :                                                 ::std::min( 11.0,
     145           0 :                                                             rAttr->getCharWeight() / 20.0 ) ) ) );
     146             :                     }
     147           0 :                     if( rAttr->isCharPostureValid() )
     148             :                     {
     149           0 :                         aParms.maFontLetterForm =
     150           0 :                             rAttr->getCharPosture() == awt::FontSlant_NONE ?
     151             :                             rendering::PanoseLetterForm::ANYTHING :
     152           0 :                             rendering::PanoseLetterForm::OBLIQUE_CONTACT;
     153             :                     }
     154           0 :                     if( rAttr->isUnderlineModeValid() )
     155             :                     {
     156           0 :                         aParms.maFontUnderline =
     157           0 :                             rAttr->getUnderlineMode();
     158             :                     }
     159             :                 }
     160             : 
     161           0 :                 io_rCacheEntry.mpRenderer = ::cppcanvas::VCLFactory::createRenderer( rDestinationCanvas,
     162           0 :                                                                                      *rMtf.get(),
     163           0 :                                                                                      aParms );
     164             : 
     165           0 :                 io_rCacheEntry.mpMtf               = rMtf;
     166           0 :                 io_rCacheEntry.mpDestinationCanvas = rDestinationCanvas;
     167             : 
     168             :                 // also invalidate alpha compositing bitmap (created
     169             :                 // new renderer, which possibly generates different
     170             :                 // output). Do NOT invalidate, if we're incidentally
     171             :                 // rendering INTO it.
     172           0 :                 if( rDestinationCanvas != io_rCacheEntry.mpLastBitmapCanvas )
     173             :                 {
     174           0 :                     io_rCacheEntry.mpLastBitmapCanvas.reset();
     175           0 :                     io_rCacheEntry.mpLastBitmap.reset();
     176           0 :                 }
     177             :             }
     178             : 
     179           0 :             return static_cast< bool >(io_rCacheEntry.mpRenderer);
     180             :         }
     181             : 
     182           0 :         bool ViewShape::draw( const ::cppcanvas::CanvasSharedPtr&   rDestinationCanvas,
     183             :                               const GDIMetaFileSharedPtr&           rMtf,
     184             :                               const ShapeAttributeLayerSharedPtr&   rAttr,
     185             :                               const ::basegfx::B2DHomMatrix&        rTransform,
     186             :                               const ::basegfx::B2DPolyPolygon*      pClip,
     187             :                               const VectorOfDocTreeNodes&           rSubsets ) const
     188             :         {
     189             :             ::cppcanvas::RendererSharedPtr pRenderer(
     190           0 :                 getRenderer( rDestinationCanvas, rMtf, rAttr ) );
     191             : 
     192           0 :             ENSURE_OR_RETURN_FALSE( pRenderer, "ViewShape::draw(): Invalid renderer" );
     193             : 
     194           0 :             pRenderer->setTransformation( rTransform );
     195             : #if OSL_DEBUG_LEVEL >= 2
     196             :             rendering::RenderState aRenderState;
     197             :             ::canvas::tools::initRenderState(aRenderState);
     198             :             ::canvas::tools::setRenderStateTransform(aRenderState,
     199             :                                                      rTransform);
     200             :             aRenderState.DeviceColor.realloc(4);
     201             :             aRenderState.DeviceColor[0] = 1.0;
     202             :             aRenderState.DeviceColor[1] = 0.0;
     203             :             aRenderState.DeviceColor[2] = 0.0;
     204             :             aRenderState.DeviceColor[3] = 1.0;
     205             : 
     206             :             try
     207             :             {
     208             :                 rDestinationCanvas->getUNOCanvas()->drawLine( geometry::RealPoint2D(0.0,0.0),
     209             :                                                               geometry::RealPoint2D(1.0,1.0),
     210             :                                                               rDestinationCanvas->getViewState(),
     211             :                                                               aRenderState );
     212             :                 rDestinationCanvas->getUNOCanvas()->drawLine( geometry::RealPoint2D(1.0,0.0),
     213             :                                                               geometry::RealPoint2D(0.0,1.0),
     214             :                                                               rDestinationCanvas->getViewState(),
     215             :                                                               aRenderState );
     216             :             }
     217             :             catch( uno::Exception& )
     218             :             {
     219             :                 DBG_UNHANDLED_EXCEPTION();
     220             :             }
     221             : #endif
     222           0 :             if( pClip )
     223           0 :                 pRenderer->setClip( *pClip );
     224             :             else
     225           0 :                 pRenderer->setClip();
     226             : 
     227           0 :             if( rSubsets.empty() )
     228             :             {
     229           0 :                 return pRenderer->draw();
     230             :             }
     231             :             else
     232             :             {
     233             :                 // render subsets of whole metafile
     234             : 
     235             : 
     236           0 :                 bool bRet(true);
     237           0 :                 VectorOfDocTreeNodes::const_iterator        aIter( rSubsets.begin() );
     238           0 :                 const VectorOfDocTreeNodes::const_iterator  aEnd ( rSubsets.end() );
     239           0 :                 while( aIter != aEnd )
     240             :                 {
     241           0 :                     if( !pRenderer->drawSubset( aIter->getStartIndex(),
     242           0 :                                                 aIter->getEndIndex() ) )
     243           0 :                         bRet = false;
     244             : 
     245           0 :                     ++aIter;
     246             :                 }
     247             : 
     248           0 :                 return bRet;
     249           0 :             }
     250             :         }
     251             : 
     252             :         namespace
     253             :         {
     254             :             /// Convert untransformed shape update area to device pixel.
     255           0 :             ::basegfx::B2DRectangle shapeArea2AreaPixel( const ::basegfx::B2DHomMatrix& rCanvasTransformation,
     256             :                                                          const ::basegfx::B2DRectangle& rUntransformedArea      )
     257             :             {
     258             :                 // convert area to pixel, and add anti-aliasing border
     259             : 
     260             :                 // TODO(P1): Should the view transform some
     261             :                 // day contain rotation/shear, transforming
     262             :                 // the original bounds with the total
     263             :                 // transformation might result in smaller
     264             :                 // overall bounds.
     265             : 
     266           0 :                 ::basegfx::B2DRectangle aBoundsPixel;
     267             :                 ::canvas::tools::calcTransformedRectBounds( aBoundsPixel,
     268             :                                                             rUntransformedArea,
     269           0 :                                                             rCanvasTransformation );
     270             : 
     271             :                 // add antialiasing border around the shape (AA
     272             :                 // touches pixel _outside_ the nominal bound rect)
     273           0 :                 aBoundsPixel.grow( ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE );
     274             : 
     275           0 :                 return aBoundsPixel;
     276             :             }
     277             : 
     278             :             /// Convert shape unit rect to device pixel.
     279           0 :             ::basegfx::B2DRectangle calcUpdateAreaPixel( const ::basegfx::B2DRectangle&         rUnitBounds,
     280             :                                                          const ::basegfx::B2DHomMatrix&         rShapeTransformation,
     281             :                                                          const ::basegfx::B2DHomMatrix&         rCanvasTransformation,
     282             :                                                          const ShapeAttributeLayerSharedPtr&    pAttr                   )
     283             :             {
     284             :                 // calc update area for whole shape (including
     285             :                 // character scaling)
     286             :                 return shapeArea2AreaPixel( rCanvasTransformation,
     287             :                                             getShapeUpdateArea( rUnitBounds,
     288             :                                                                 rShapeTransformation,
     289           0 :                                                                 pAttr ) );
     290             :             }
     291             :         }
     292             : 
     293           0 :         bool ViewShape::renderSprite( const ViewLayerSharedPtr&             rViewLayer,
     294             :                                       const GDIMetaFileSharedPtr&           rMtf,
     295             :                                       const ::basegfx::B2DRectangle&        rOrigBounds,
     296             :                                       const ::basegfx::B2DRectangle&        rBounds,
     297             :                                       const ::basegfx::B2DRectangle&        rUnitBounds,
     298             :                                       int                                   nUpdateFlags,
     299             :                                       const ShapeAttributeLayerSharedPtr&   pAttr,
     300             :                                       const VectorOfDocTreeNodes&           rSubsets,
     301             :                                       double                                nPrio,
     302             :                                       bool                                  bIsVisible ) const
     303             :         {
     304             :             // TODO(P1): For multiple views, it might pay off to reorg Shape and ViewShape,
     305             :             // in that all the common setup steps here are refactored to Shape (would then
     306             :             // have to be performed only _once_ per Shape paint).
     307             : 
     308           0 :             if( !bIsVisible ||
     309           0 :                 rUnitBounds.isEmpty() ||
     310           0 :                 rOrigBounds.isEmpty() ||
     311           0 :                 rBounds.isEmpty() )
     312             :             {
     313             :                 // shape is invisible or has zero size, no need to
     314             :                 // update anything.
     315           0 :                 if( mpSprite )
     316           0 :                     mpSprite->hide();
     317             : 
     318           0 :                 return true;
     319             :             }
     320             : 
     321             : 
     322             :             // calc sprite position, size and content transformation
     323             :             // =====================================================
     324             : 
     325             :             // the shape transformation for a sprite is always a
     326             :             // simple scale-up to the nominal shape size. Everything
     327             :             // else is handled via the sprite transformation
     328           0 :             ::basegfx::B2DHomMatrix aNonTranslationalShapeTransformation;
     329             :             aNonTranslationalShapeTransformation.scale( rOrigBounds.getWidth(),
     330           0 :                                                         rOrigBounds.getHeight() );
     331           0 :             ::basegfx::B2DHomMatrix aShapeTransformation( aNonTranslationalShapeTransformation );
     332             :             aShapeTransformation.translate( rOrigBounds.getMinX(),
     333           0 :                                             rOrigBounds.getMinY() );
     334             : 
     335             :             const ::basegfx::B2DHomMatrix& rCanvasTransform(
     336           0 :                 rViewLayer->getSpriteTransformation() );
     337             : 
     338             :             // area actually needed for the sprite
     339             :             const ::basegfx::B2DRectangle& rSpriteBoundsPixel(
     340             :                 calcUpdateAreaPixel( rUnitBounds,
     341             :                                      aShapeTransformation,
     342             :                                      rCanvasTransform,
     343           0 :                                      pAttr ) );
     344             : 
     345             :             // actual area for the shape (without subsetting, but
     346             :             // including char scaling)
     347             :             const ::basegfx::B2DRectangle& rShapeBoundsPixel(
     348             :                 calcUpdateAreaPixel( ::basegfx::B2DRectangle(0.0,0.0,1.0,1.0),
     349             :                                      aShapeTransformation,
     350             :                                      rCanvasTransform,
     351           0 :                                      pAttr ) );
     352             : 
     353             :             // nominal area for the shape (without subsetting, without
     354             :             // char scaling). NOTE: to cancel the shape translation,
     355             :             // contained in rSpriteBoundsPixel, this is _without_ any
     356             :             // translational component.
     357           0 :             ::basegfx::B2DRectangle        aLogShapeBounds;
     358             :             const ::basegfx::B2DRectangle& rNominalShapeBoundsPixel(
     359             :                 shapeArea2AreaPixel( rCanvasTransform,
     360             :                                      ::canvas::tools::calcTransformedRectBounds(
     361             :                                          aLogShapeBounds,
     362             :                                          ::basegfx::B2DRectangle(0.0,0.0,1.0,1.0),
     363           0 :                                          aNonTranslationalShapeTransformation ) ) );
     364             : 
     365             :             // create (or resize) sprite with sprite's pixel size, if
     366             :             // not done already
     367           0 :             const ::basegfx::B2DSize& rSpriteSizePixel(rSpriteBoundsPixel.getRange());
     368           0 :             if( !mpSprite )
     369             :             {
     370             :                 mpSprite.reset(
     371             :                     new AnimatedSprite( mpViewLayer,
     372             :                                         rSpriteSizePixel,
     373           0 :                                         nPrio ));
     374             :             }
     375             :             else
     376             :             {
     377             :                 // TODO(F2): when the sprite _actually_ gets resized,
     378             :                 // content needs a repaint!
     379           0 :                 mpSprite->resize( rSpriteSizePixel );
     380             :             }
     381             : 
     382           0 :             ENSURE_OR_RETURN_FALSE( mpSprite, "ViewShape::renderSprite(): No sprite" );
     383             : 
     384             :             VERBOSE_TRACE( "ViewShape::renderSprite(): Rendering sprite 0x%p",
     385             :                            mpSprite.get() );
     386             : 
     387             : 
     388             :             // always show the sprite (might have been hidden before)
     389           0 :             mpSprite->show();
     390             : 
     391             :             // determine center of sprite output position in pixel
     392             :             // (assumption here: all shape transformations have the
     393             :             // shape center as the pivot point). From that, subtract
     394             :             // distance of rSpriteBoundsPixel's left, top edge from
     395             :             // rShapeBoundsPixel's center. This moves the sprite at
     396             :             // the appropriate output position within the virtual
     397             :             // rShapeBoundsPixel area.
     398           0 :             ::basegfx::B2DPoint aSpritePosPixel( rBounds.getCenter() );
     399           0 :             aSpritePosPixel *= rCanvasTransform;
     400           0 :             aSpritePosPixel -= rShapeBoundsPixel.getCenter() - rSpriteBoundsPixel.getMinimum();
     401             : 
     402             :             // the difference between rShapeBoundsPixel and
     403             :             // rSpriteBoundsPixel upper, left corner is: the offset we
     404             :             // have to move sprite output to the right, top (to make
     405             :             // the desired subset content visible at all)
     406             :             const ::basegfx::B2DSize& rSpriteCorrectionOffset(
     407           0 :                 rSpriteBoundsPixel.getMinimum() - rNominalShapeBoundsPixel.getMinimum() );
     408             : 
     409             :             // offset added top, left for anti-aliasing (otherwise,
     410             :             // shapes fully filling the sprite will have anti-aliased
     411             :             // pixel cut off)
     412             :             const ::basegfx::B2DSize aAAOffset(
     413             :                 ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE,
     414           0 :                 ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE );
     415             : 
     416             :             // set pixel output offset to sprite: we always leave
     417             :             // ANTIALIASING_EXTRA_SIZE room atop and to the left, and,
     418             :             // what's more, for subsetted shapes, we _have_ to cancel
     419             :             // the effect of the shape renderer outputting the subset
     420             :             // at its absolute position inside the shape, instead of
     421             :             // at the origin.
     422             :             // NOTE: As for now, sprites are always positioned on
     423             :             // integer pixel positions on screen, have to round to
     424             :             // nearest integer here, too
     425             :             mpSprite->setPixelOffset(
     426           0 :                 aAAOffset - ::basegfx::B2DSize(
     427           0 :                     ::basegfx::fround( rSpriteCorrectionOffset.getX() ),
     428           0 :                     ::basegfx::fround( rSpriteCorrectionOffset.getY() ) ) );
     429             : 
     430             :             // always set sprite position and transformation, since
     431             :             // they do not relate directly to the update flags
     432             :             // (e.g. sprite position changes when sprite size changes)
     433           0 :             mpSprite->movePixel( aSpritePosPixel );
     434             :             mpSprite->transform( getSpriteTransformation( rSpriteSizePixel,
     435             :                                                           rOrigBounds.getRange(),
     436           0 :                                                           pAttr ) );
     437             : 
     438             : 
     439             :             // process flags
     440             :             // =============
     441             : 
     442           0 :             bool bRedrawRequired( mbForceUpdate || (nUpdateFlags & FORCE) );
     443             : 
     444           0 :             if( mbForceUpdate || (nUpdateFlags & ALPHA) )
     445             :             {
     446           0 :                 mpSprite->setAlpha( (pAttr && pAttr->isAlphaValid()) ?
     447           0 :                                     ::basegfx::clamp(pAttr->getAlpha(),
     448             :                                                      0.0,
     449           0 :                                                      1.0) :
     450           0 :                                     1.0 );
     451             :             }
     452           0 :             if( mbForceUpdate || (nUpdateFlags & CLIP) )
     453             :             {
     454           0 :                 if( pAttr && pAttr->isClipValid() )
     455             :                 {
     456           0 :                     ::basegfx::B2DPolyPolygon aClipPoly( pAttr->getClip() );
     457             : 
     458             :                     // extract linear part of canvas view transformation
     459             :                     // (linear means: without translational components)
     460             :                     ::basegfx::B2DHomMatrix aViewTransform(
     461           0 :                         mpViewLayer->getTransformation() );
     462           0 :                     aViewTransform.set( 0, 2, 0.0 );
     463           0 :                     aViewTransform.set( 1, 2, 0.0 );
     464             : 
     465             :                     // make the clip 2*ANTIALIASING_EXTRA_SIZE larger
     466             :                     // such that it's again centered over the sprite.
     467           0 :                     aViewTransform.scale(rSpriteSizePixel.getX()/
     468           0 :                                          (rSpriteSizePixel.getX()-2*::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE),
     469           0 :                                          rSpriteSizePixel.getY()/
     470           0 :                                          (rSpriteSizePixel.getY()-2*::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE));
     471             : 
     472             :                     // transform clip polygon from view to device
     473             :                     // coordinate space
     474           0 :                     aClipPoly.transform( aViewTransform );
     475             : 
     476           0 :                     mpSprite->clip( aClipPoly );
     477             :                 }
     478             :                 else
     479           0 :                     mpSprite->clip();
     480             :             }
     481           0 :             if( mbForceUpdate || (nUpdateFlags & CONTENT) )
     482             :             {
     483           0 :                 bRedrawRequired = true;
     484             : 
     485             :                 // TODO(P1): maybe provide some appearance change methods at
     486             :                 // the Renderer interface
     487             : 
     488             :                 // force the renderer to be regenerated below, for the
     489             :                 // different attributes to take effect
     490           0 :                 invalidateRenderer();
     491             :             }
     492             : 
     493           0 :             mbForceUpdate = false;
     494             : 
     495           0 :             if( !bRedrawRequired )
     496           0 :                 return true;
     497             : 
     498             : 
     499             :             // sprite needs repaint - output to sprite canvas
     500             :             // ==============================================
     501             : 
     502           0 :             ::cppcanvas::CanvasSharedPtr pContentCanvas( mpSprite->getContentCanvas() );
     503             : 
     504             :             return draw( pContentCanvas,
     505             :                          rMtf,
     506             :                          pAttr,
     507             :                          aShapeTransformation,
     508             :                          NULL, // clipping is done via Sprite::clip()
     509           0 :                          rSubsets );
     510             :         }
     511             : 
     512           0 :         bool ViewShape::render( const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas,
     513             :                                 const GDIMetaFileSharedPtr&         rMtf,
     514             :                                 const ::basegfx::B2DRectangle&      rBounds,
     515             :                                 const ::basegfx::B2DRectangle&      rUpdateBounds,
     516             :                                 int                                 nUpdateFlags,
     517             :                                 const ShapeAttributeLayerSharedPtr& pAttr,
     518             :                                 const VectorOfDocTreeNodes&         rSubsets,
     519             :                                 bool                                bIsVisible ) const
     520             :         {
     521             :             // TODO(P1): For multiple views, it might pay off to reorg Shape and ViewShape,
     522             :             // in that all the common setup steps here are refactored to Shape (would then
     523             :             // have to be performed only _once_ per Shape paint).
     524             : 
     525           0 :             if( !bIsVisible )
     526             :             {
     527             :                 VERBOSE_TRACE( "ViewShape::render(): skipping shape %p", this );
     528             : 
     529             :                 // shape is invisible, no need to update anything.
     530           0 :                 return true;
     531             :             }
     532             : 
     533             :             // since we have no sprite here, _any_ update request
     534             :             // translates into a required redraw.
     535           0 :             bool bRedrawRequired( mbForceUpdate || nUpdateFlags != 0 );
     536             : 
     537           0 :             if( (nUpdateFlags & CONTENT) )
     538             :             {
     539             :                 // TODO(P1): maybe provide some appearance change methods at
     540             :                 // the Renderer interface
     541             : 
     542             :                 // force the renderer to be regenerated below, for the
     543             :                 // different attributes to take effect
     544           0 :                 invalidateRenderer();
     545             :             }
     546             : 
     547           0 :             mbForceUpdate = false;
     548             : 
     549           0 :             if( !bRedrawRequired )
     550           0 :                 return true;
     551             : 
     552             :             VERBOSE_TRACE( "ViewShape::render(): rendering shape %p at position (%f,%f)",
     553             :                            this,
     554             :                            rBounds.getMinX(),
     555             :                            rBounds.getMinY() );
     556             : 
     557             : 
     558             :             // shape needs repaint - setup all that's needed
     559             : 
     560             : 
     561           0 :             boost::optional<basegfx::B2DPolyPolygon> aClip;
     562             : 
     563           0 :             if( pAttr )
     564             :             {
     565             :                 // setup clip poly
     566           0 :                 if( pAttr->isClipValid() )
     567           0 :                     aClip.reset( pAttr->getClip() );
     568             : 
     569             :                 // emulate global shape alpha by first rendering into
     570             :                 // a temp bitmap, and then to screen (this would have
     571             :                 // been much easier if we'd be currently a sprite -
     572             :                 // see above)
     573           0 :                 if( pAttr->isAlphaValid() )
     574             :                 {
     575           0 :                     const double nAlpha( pAttr->getAlpha() );
     576             : 
     577           0 :                     if( !::basegfx::fTools::equalZero( nAlpha ) &&
     578           0 :                         !::rtl::math::approxEqual(nAlpha, 1.0) )
     579             :                     {
     580             :                         // render with global alpha - have to prepare
     581             :                         // a bitmap, and render that with modulated
     582             :                         // alpha
     583             : 
     584             : 
     585             :                         const ::basegfx::B2DHomMatrix aTransform(
     586             :                             getShapeTransformation( rBounds,
     587           0 :                                                     pAttr ) );
     588             : 
     589             :                         // TODO(P1): Should the view transform some
     590             :                         // day contain rotation/shear, transforming
     591             :                         // the original bounds with the total
     592             :                         // transformation might result in smaller
     593             :                         // overall bounds.
     594             : 
     595             :                         // determine output rect of _shape update
     596             :                         // area_ in device pixel
     597             :                         const ::basegfx::B2DHomMatrix aCanvasTransform(
     598           0 :                             rDestinationCanvas->getTransformation() );
     599           0 :                         ::basegfx::B2DRectangle aTmpRect;
     600             :                         ::canvas::tools::calcTransformedRectBounds( aTmpRect,
     601             :                                                                     rUpdateBounds,
     602           0 :                                                                     aCanvasTransform );
     603             : 
     604             :                         // pixel size of cache bitmap: round up to
     605             :                         // nearest int
     606           0 :                         const ::basegfx::B2ISize aBmpSize( static_cast<sal_Int32>( aTmpRect.getWidth() )+1,
     607           0 :                                                            static_cast<sal_Int32>( aTmpRect.getHeight() )+1 );
     608             : 
     609             :                         // try to fetch temporary surface for alpha
     610             :                         // compositing (to achieve the global alpha
     611             :                         // blend effect, have to first render shape as
     612             :                         // a whole, then blit that surface with global
     613             :                         // alpha to the destination)
     614             :                         const RendererCacheVector::iterator aCompositingSurface(
     615           0 :                             getCacheEntry( rDestinationCanvas ) );
     616             : 
     617           0 :                         if( !aCompositingSurface->mpLastBitmapCanvas ||
     618           0 :                             aCompositingSurface->mpLastBitmapCanvas->getSize() != aBmpSize )
     619             :                         {
     620             :                             // create a bitmap of appropriate size
     621             :                             ::cppcanvas::BitmapSharedPtr pBitmap(
     622             :                                 ::cppcanvas::BaseGfxFactory::createAlphaBitmap(
     623             :                                     rDestinationCanvas,
     624           0 :                                     aBmpSize ) );
     625             : 
     626           0 :                             ENSURE_OR_THROW(pBitmap,
     627             :                                              "ViewShape::render(): Could not create compositing surface");
     628             : 
     629           0 :                             aCompositingSurface->mpDestinationCanvas = rDestinationCanvas;
     630           0 :                             aCompositingSurface->mpLastBitmap        = pBitmap;
     631           0 :                             aCompositingSurface->mpLastBitmapCanvas  = pBitmap->getBitmapCanvas();
     632             :                         }
     633             : 
     634             :                         // buffer aCompositingSurface iterator content
     635             :                         // - said one might get invalidated during
     636             :                         // draw() below.
     637             :                         ::cppcanvas::BitmapCanvasSharedPtr pBitmapCanvas(
     638           0 :                             aCompositingSurface->mpLastBitmapCanvas );
     639             : 
     640             :                         ::cppcanvas::BitmapSharedPtr pBitmap(
     641           0 :                             aCompositingSurface->mpLastBitmap);
     642             : 
     643             :                         // setup bitmap canvas transformation -
     644             :                         // which happens to be the destination
     645             :                         // canvas transformation without any
     646             :                         // translational components.
     647             : 
     648             :                         // But then, the render transformation as
     649             :                         // calculated by getShapeTransformation()
     650             :                         // above outputs the shape at its real
     651             :                         // destination position. Thus, we have to
     652             :                         // offset the output back to the origin,
     653             :                         // for which we simply plug in the
     654             :                         // negative position of the left, top edge
     655             :                         // of the shape's bound rect in device
     656             :                         // pixel into aLinearTransform below.
     657           0 :                         ::basegfx::B2DHomMatrix aAdjustedCanvasTransform( aCanvasTransform );
     658           0 :                         aAdjustedCanvasTransform.translate( -aTmpRect.getMinX(),
     659           0 :                                                             -aTmpRect.getMinY() );
     660             : 
     661           0 :                         pBitmapCanvas->setTransformation( aAdjustedCanvasTransform );
     662             : 
     663             :                         // TODO(P2): If no update flags, or only
     664             :                         // alpha_update is set, we can save us the
     665             :                         // rendering into the bitmap (uh, it's not
     666             :                         // _that_ easy - for a forced redraw,
     667             :                         // e.g. when ending an animation, we always
     668             :                         // get UPDATE_FORCE here).
     669             : 
     670             :                         // render into this bitmap
     671           0 :                         if( !draw( pBitmapCanvas,
     672             :                                    rMtf,
     673             :                                    pAttr,
     674             :                                    aTransform,
     675           0 :                                    !aClip ? NULL : &(*aClip),
     676           0 :                                    rSubsets ) )
     677             :                         {
     678           0 :                             return false;
     679             :                         }
     680             : 
     681             :                         // render bitmap to screen, with given global
     682             :                         // alpha. Since the bitmap already contains
     683             :                         // pixel-equivalent output, we have to use the
     684             :                         // inverse view transformation, adjusted with
     685             :                         // the final shape output position (note:
     686             :                         // cannot simply change the view
     687             :                         // transformation here, as that would affect a
     688             :                         // possibly set clip!)
     689           0 :                         ::basegfx::B2DHomMatrix aBitmapTransform( aCanvasTransform );
     690             :                         OSL_ENSURE( aBitmapTransform.isInvertible(),
     691             :                                     "ViewShape::render(): View transformation is singular!" );
     692             : 
     693           0 :                         aBitmapTransform.invert();
     694             : 
     695             :                         const basegfx::B2DHomMatrix aTranslation(basegfx::tools::createTranslateB2DHomMatrix(
     696           0 :                             aTmpRect.getMinX(), aTmpRect.getMinY()));
     697             : 
     698           0 :                         aBitmapTransform = aBitmapTransform * aTranslation;
     699           0 :                         pBitmap->setTransformation( aBitmapTransform );
     700             : 
     701             :                         // finally, render bitmap alpha-modulated
     702           0 :                         pBitmap->drawAlphaModulated( nAlpha );
     703             : 
     704           0 :                         return true;
     705             :                     }
     706             :                 }
     707             :             }
     708             : 
     709             :             // retrieve shape transformation, _with_ shape translation
     710             :             // to actual page position.
     711             :             const ::basegfx::B2DHomMatrix aTransform(
     712             :                 getShapeTransformation( rBounds,
     713           0 :                                         pAttr ) );
     714             : 
     715             :             return draw( rDestinationCanvas,
     716             :                          rMtf,
     717             :                          pAttr,
     718             :                          aTransform,
     719           0 :                          !aClip ? NULL : &(*aClip),
     720           0 :                          rSubsets );
     721             :         }
     722             : 
     723             : 
     724             : 
     725             : 
     726           0 :         ViewShape::ViewShape( const ViewLayerSharedPtr& rViewLayer ) :
     727             :             mpViewLayer( rViewLayer ),
     728             :             maRenderers(),
     729             :             mpSprite(),
     730             :             mbAnimationMode( false ),
     731           0 :             mbForceUpdate( true )
     732             :         {
     733           0 :             ENSURE_OR_THROW( mpViewLayer, "ViewShape::ViewShape(): Invalid View" );
     734           0 :         }
     735             : 
     736           0 :         ViewLayerSharedPtr ViewShape::getViewLayer() const
     737             :         {
     738           0 :             return mpViewLayer;
     739             :         }
     740             : 
     741           0 :         ViewShape::RendererCacheVector::iterator ViewShape::getCacheEntry( const ::cppcanvas::CanvasSharedPtr&  rDestinationCanvas ) const
     742             :         {
     743             :             // lookup destination canvas - is there already a renderer
     744             :             // created for that target?
     745           0 :             RendererCacheVector::iterator       aIter;
     746           0 :             const RendererCacheVector::iterator aEnd( maRenderers.end() );
     747             : 
     748             :             // already there?
     749           0 :             if( (aIter=::std::find_if( maRenderers.begin(),
     750             :                                        aEnd,
     751             :                                        ::boost::bind(
     752             :                                            ::std::equal_to< ::cppcanvas::CanvasSharedPtr >(),
     753             :                                            ::boost::cref( rDestinationCanvas ),
     754             :                                            ::boost::bind(
     755             :                                                &RendererCacheEntry::getDestinationCanvas,
     756           0 :                                                _1 ) ) ) ) == aEnd )
     757             :             {
     758           0 :                 if( maRenderers.size() >= MAX_RENDER_CACHE_ENTRIES )
     759             :                 {
     760             :                     // cache size exceeded - prune entries. For now,
     761             :                     // simply remove the first one, which of course
     762             :                     // breaks for more complex access schemes. But in
     763             :                     // general, this leads to most recently used
     764             :                     // entries to reside at the end of the vector.
     765           0 :                     maRenderers.erase( maRenderers.begin() );
     766             : 
     767             :                     // ATTENTION: after this, both aIter and aEnd are
     768             :                     // invalid!
     769             :                 }
     770             : 
     771             :                 // not yet in cache - add default-constructed cache
     772             :                 // entry, to have something to return
     773           0 :                 maRenderers.push_back( RendererCacheEntry() );
     774           0 :                 aIter = maRenderers.end()-1;
     775             :             }
     776             : 
     777           0 :             return aIter;
     778             :         }
     779             : 
     780           0 :         ::cppcanvas::RendererSharedPtr ViewShape::getRenderer( const ::cppcanvas::CanvasSharedPtr&  rDestinationCanvas,
     781             :                                                                const GDIMetaFileSharedPtr&          rMtf,
     782             :                                                                const ShapeAttributeLayerSharedPtr&  rAttr ) const
     783             :         {
     784             :             // lookup destination canvas - is there already a renderer
     785             :             // created for that target?
     786             :             const RendererCacheVector::iterator aIter(
     787           0 :                 getCacheEntry( rDestinationCanvas ) );
     788             : 
     789             :             // now we have a valid entry, either way. call prefetch()
     790             :             // on it, nevertheless - maybe the metafile changed, and
     791             :             // the renderer still needs an update (prefetch() will
     792             :             // detect that)
     793           0 :             if( prefetch( *aIter,
     794             :                           rDestinationCanvas,
     795             :                           rMtf,
     796             :                           rAttr ) )
     797             :             {
     798           0 :                 return aIter->mpRenderer;
     799             :             }
     800             :             else
     801             :             {
     802             :                 // prefetch failed - renderer is invalid
     803           0 :                 return ::cppcanvas::RendererSharedPtr();
     804             :             }
     805             :         }
     806             : 
     807           0 :         void ViewShape::invalidateRenderer() const
     808             :         {
     809             :             // simply clear the cache. Subsequent getRenderer() calls
     810             :             // will regenerate the Renderers.
     811           0 :             maRenderers.clear();
     812           0 :         }
     813             : 
     814           0 :         ::basegfx::B2DSize ViewShape::getAntialiasingBorder() const
     815             :         {
     816           0 :             ENSURE_OR_THROW( mpViewLayer->getCanvas(),
     817             :                               "ViewShape::getAntialiasingBorder(): Invalid ViewLayer canvas" );
     818             : 
     819             :             const ::basegfx::B2DHomMatrix& rViewTransform(
     820           0 :                 mpViewLayer->getTransformation() );
     821             : 
     822             :             // TODO(F1): As a quick shortcut (did not want to invert
     823             :             // whole matrix here), taking only scale components of
     824             :             // view transformation matrix. This will be wrong when
     825             :             // e.g. shearing is involved.
     826           0 :             const double nXBorder( ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE / rViewTransform.get(0,0) );
     827           0 :             const double nYBorder( ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE / rViewTransform.get(1,1) );
     828             : 
     829             :             return ::basegfx::B2DSize( nXBorder,
     830           0 :                                        nYBorder );
     831             :         }
     832             : 
     833           0 :         bool ViewShape::enterAnimationMode()
     834             :         {
     835           0 :             mbForceUpdate   = true;
     836           0 :             mbAnimationMode = true;
     837             : 
     838           0 :             return true;
     839             :         }
     840             : 
     841           0 :         void ViewShape::leaveAnimationMode()
     842             :         {
     843           0 :             mpSprite.reset();
     844           0 :             mbAnimationMode = false;
     845           0 :             mbForceUpdate   = true;
     846           0 :         }
     847             : 
     848           0 :         bool ViewShape::update( const GDIMetaFileSharedPtr& rMtf,
     849             :                                 const RenderArgs&           rArgs,
     850             :                                 int                         nUpdateFlags,
     851             :                                 bool                        bIsVisible ) const
     852             :         {
     853           0 :             ENSURE_OR_RETURN_FALSE( mpViewLayer->getCanvas(), "ViewShape::update(): Invalid layer canvas" );
     854             : 
     855             :             // Shall we render to a sprite, or to a plain canvas?
     856           0 :             if( isBackgroundDetached() )
     857             :                 return renderSprite( mpViewLayer,
     858             :                                      rMtf,
     859             :                                      rArgs.maOrigBounds,
     860             :                                      rArgs.maBounds,
     861             :                                      rArgs.maUnitBounds,
     862             :                                      nUpdateFlags,
     863             :                                      rArgs.mrAttr,
     864             :                                      rArgs.mrSubsets,
     865             :                                      rArgs.mnShapePriority,
     866           0 :                                      bIsVisible );
     867             :             else
     868           0 :                 return render( mpViewLayer->getCanvas(),
     869             :                                rMtf,
     870             :                                rArgs.maBounds,
     871             :                                rArgs.maUpdateBounds,
     872             :                                nUpdateFlags,
     873             :                                rArgs.mrAttr,
     874             :                                rArgs.mrSubsets,
     875           0 :                                bIsVisible );
     876             :         }
     877             : 
     878             :     }
     879           3 : }
     880             : 
     881             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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