canvas/source/tools/surfaceproxy.cxx

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  27
  28 // MARKER(update_precomp.py): autogen include statement, do not remove
  29 #include "precompiled_canvas.hxx"
  30
  31 #include <boost/bind.hpp>
  32 #include <basegfx/polygon/b2dpolygoncutandtouch.hxx>
  33 #include <basegfx/polygon/b2dpolygontriangulator.hxx>
  34 #include <basegfx/polygon/b2dpolypolygontools.hxx>
  35 #include "surfaceproxy.hxx"
  36
  37 namespace canvas
  38 {
  39     //////////////////////////////////////////////////////////////////////////////////
  40     // SurfaceProxy::SurfaceProxy
  41     //////////////////////////////////////////////////////////////////////////////////
  42
  43     SurfaceProxy::SurfaceProxy( const canvas::IColorBufferSharedPtr& pBuffer,
  44                                 const PageManagerSharedPtr&          pPageManager ) :
  45         mpPageManager( pPageManager ),
  46         maSurfaceList(),
  47         mpBuffer( pBuffer )
  48     {
  49         const ::basegfx::B2ISize aImageSize(mpBuffer->getWidth(),mpBuffer->getHeight());
  50         const ::basegfx::B2ISize aPageSize(mpPageManager->getPageSize());
  51         const sal_Int32 aPageSizeX(aPageSize.getX());
  52         const sal_Int32 aPageSizeY(aPageSize.getY());
  53         const sal_Int32 aImageSizeX(aImageSize.getX());
  54         const sal_Int32 aImageSizeY(aImageSize.getY());
  55
  56         // see if the size of the colorbuffer is larger than the size
  57         // of a single page. if this is the case we divide the
  58         // colorbuffer into as many surfaces as we need to get the
  59         // whole area distributed.  otherwise (the colorbuffer is
  60         // smaller than the size of a single page) we search for free
  61         // pages or create a new one.
  62         // the incoming image is too large to fit into a single
  63         // page.  strategy: we split the image into rectangular
  64         // areas that are as large as the maximum page size
  65         // dictates and follow the strategy for fitting images.
  66         size_t dwNumSurfaces(0);
  67         for(sal_Int32 y=0; y<aImageSizeY; y+=aPageSizeY)
  68             for(sal_Int32 x=0; x<aImageSizeX; x+=aPageSizeX)
  69                 ++dwNumSurfaces;
  70         maSurfaceList.reserve(dwNumSurfaces);
  71
  72         for(sal_Int32 y=0; y<aImageSizeY; y+=aPageSizeY)
  73         {
  74             for(sal_Int32 x=0; x<aImageSizeX; x+=aPageSizeX)
  75             {
  76                 // the current surface is located at the position [x,y]
  77                 // and has the size [min(restx,pagesizex),min(resty,pagesizey)
  78                 ::basegfx::B2IPoint aOffset(x,y);
  79                 ::basegfx::B2ISize aSize( ::std::min( aImageSize.getX()-x,
  80                                                       aPageSize.getX() ),
  81                                           ::std::min( aImageSize.getY()-y,
  82                                                       aPageSize.getY() ) );
  83
  84                 maSurfaceList.push_back(
  85                     SurfaceSharedPtr(
  86                         new Surface(
  87                             mpPageManager,
  88                             mpBuffer,
  89                             aOffset,
  90                             aSize)));
  91             }
  92         }
  93     }
  94
  95     //////////////////////////////////////////////////////////////////////////////////
  96     // SurfaceProxy::setColorBufferDirty
  97     //////////////////////////////////////////////////////////////////////////////////
  98
  99     void SurfaceProxy::setColorBufferDirty()
 100     {
 101         ::std::for_each( maSurfaceList.begin(),
 102                          maSurfaceList.end(),
 103                          ::boost::mem_fn(&Surface::setColorBufferDirty));
 104     }
 105
 106     //////////////////////////////////////////////////////////////////////////////////
 107     // SurfaceProxy::draw
 108     //////////////////////////////////////////////////////////////////////////////////
 109
 110     bool SurfaceProxy::draw( double                         fAlpha,
 111                              const ::basegfx::B2DPoint&     rPos,
 112                              const ::basegfx::B2DHomMatrix& rTransform )
 113     {
 114         ::std::for_each( maSurfaceList.begin(),
 115                          maSurfaceList.end(),
 116                          ::boost::bind( &Surface::draw,
 117                                         _1,
 118                                         fAlpha,
 119                                         ::boost::cref(rPos),
 120                                         ::boost::cref(rTransform)));
 121
 122         return true;
 123     }
 124
 125     //////////////////////////////////////////////////////////////////////////////////
 126     // SurfaceProxy::draw
 127     //////////////////////////////////////////////////////////////////////////////////
 128
 129     bool SurfaceProxy::draw( double                         fAlpha,
 130                              const ::basegfx::B2DPoint&     rPos,
 131                              const ::basegfx::B2DRange&     rArea,
 132                              const ::basegfx::B2DHomMatrix& rTransform )
 133     {
 134         ::std::for_each( maSurfaceList.begin(),
 135                          maSurfaceList.end(),
 136                          ::boost::bind(&Surface::drawRectangularArea,
 137                                        _1,
 138                                        fAlpha,
 139                                        ::boost::cref(rPos),
 140                                        ::boost::cref(rArea),
 141                                        ::boost::cref(rTransform)));
 142
 143         return true;
 144     }
 145
 146     //////////////////////////////////////////////////////////////////////////////////
 147     // SurfaceProxy::draw
 148     //////////////////////////////////////////////////////////////////////////////////
 149
 150     bool SurfaceProxy::draw( double                           fAlpha,
 151                              const ::basegfx::B2DPoint&       rPos,
 152                              const ::basegfx::B2DPolyPolygon& rClipPoly,
 153                              const ::basegfx::B2DHomMatrix&   rTransform )
 154     {
 155         const ::basegfx::B2DPolygon& rTriangulatedPolygon(
 156             ::basegfx::triangulator::triangulate(rClipPoly));
 157
 158 #if defined(VERBOSE) && OSL_DEBUG_LEVEL > 0
 159         // dump polygons
 160         OSL_TRACE( "Original clip polygon: %s\n"
 161                    "Triangulated polygon: %s\n",
 162                    rtl::OUStringToOString(
 163                        basegfx::tools::exportToSvgD( rClipPoly ),
 164                        RTL_TEXTENCODING_ASCII_US).getStr(),
 165                    rtl::OUStringToOString(
 166                        basegfx::tools::exportToSvgD(
 167                            basegfx::B2DPolyPolygon(rTriangulatedPolygon) ),
 168                        RTL_TEXTENCODING_ASCII_US).getStr() );
 169 #endif
 170
 171         ::std::for_each( maSurfaceList.begin(),
 172                          maSurfaceList.end(),
 173                          ::boost::bind(&Surface::drawWithClip,
 174                                        _1,
 175                                        fAlpha,
 176                                        ::boost::cref(rPos),
 177                                        ::boost::cref(rTriangulatedPolygon),
 178                                        ::boost::cref(rTransform)));
 179
 180         return true;
 181     }
 182 }