AOO410/main/slideshow/source/engine/slidebitmap.cxx

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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_slideshow.hxx"

// must be first
#include <canvas/debug.hxx>
#include <tools/diagnose_ex.h>
#include <slidebitmap.hxx>

#include <com/sun/star/rendering/XCanvas.hpp>
#include <com/sun/star/rendering/XBitmap.hpp>
#include <comphelper/anytostring.hxx>
#include <cppuhelper/exc_hlp.hxx>

#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>

#include <canvas/canvastools.hxx>
#include <basegfx/tools/canvastools.hxx>


using namespace ::com::sun::star;

namespace slideshow
{
    namespace internal
    {

        SlideBitmap::SlideBitmap( const ::cppcanvas::BitmapSharedPtr& rBitmap ) :
            maOutputPos(),
            maClipPoly(),
            mxBitmap()
        {
            if( rBitmap )
                mxBitmap = rBitmap->getUNOBitmap();

            ENSURE_OR_THROW( mxBitmap.is(), "SlideBitmap::SlideBitmap(): Invalid bitmap" );
        }
        
        bool SlideBitmap::draw( const ::cppcanvas::CanvasSharedPtr& rCanvas ) const
        {
            ENSURE_OR_RETURN_FALSE( rCanvas && rCanvas->getUNOCanvas().is(), 
                               "SlideBitmap::draw(): Invalid canvas" );

            // selectively only copy the transformation from current viewstate,
            // don't want no clipping here.
            rendering::ViewState aViewState;
            aViewState.AffineTransform = rCanvas->getViewState().AffineTransform; 

            rendering::RenderState aRenderState;
            ::canvas::tools::initRenderState( aRenderState );
            
            const basegfx::B2DHomMatrix aTranslation(basegfx::tools::createTranslateB2DHomMatrix(maOutputPos));
            ::canvas::tools::setRenderStateTransform( aRenderState, aTranslation );

            try
            {
                if( maClipPoly.count() )
                {
                    // TODO(P1): Buffer the clip polygon    
                    aRenderState.Clip = 
                        ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon( 
                            rCanvas->getUNOCanvas()->getDevice(),
                            maClipPoly );
                }
                
                rCanvas->getUNOCanvas()->drawBitmap( mxBitmap, 
                                                     aViewState, 
                                                     aRenderState );
            }
            catch( uno::Exception& )
            {
                OSL_ENSURE( false,
                            rtl::OUStringToOString(
                                comphelper::anyToString( cppu::getCaughtException() ),
                                RTL_TEXTENCODING_UTF8 ).getStr() );

                return false;
            }

            return true;
        }

        ::basegfx::B2ISize SlideBitmap::getSize() const
        {
            return ::basegfx::unotools::b2ISizeFromIntegerSize2D( mxBitmap->getSize() );
        }
        
        void SlideBitmap::move( const ::basegfx::B2DPoint& rNewPos )
        {
            maOutputPos = rNewPos;
        }

        void SlideBitmap::clip( const ::basegfx::B2DPolyPolygon& rClipPoly )
        {
            maClipPoly = rClipPoly;
        }
        
        ::com::sun::star::uno::Reference<
                ::com::sun::star::rendering::XBitmap >    SlideBitmap::getXBitmap()
        {
        return mxBitmap;
        }

    }
}