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#include <sal/config.h>

#include "dx_impltools.hxx"
#include "dx_surfacegraphics.hxx"

using namespace ::com::sun::star;

namespace dxcanvas
{
    namespace
    {
        struct GraphicsDeleter
        {
            sal::systools::COMReference<surface_type> mpSurface;
            HDC                        maHDC;

            GraphicsDeleter(const sal::systools::COMReference<surface_type>& rSurface, HDC hdc) :
                mpSurface(rSurface),
                maHDC(hdc)
            {}

            void operator()( Gdiplus::Graphics* pGraphics )
            {
                if(!pGraphics)
                    return;

                pGraphics->Flush(Gdiplus::FlushIntentionSync);
                delete pGraphics;

                if(mpSurface.is())
                    mpSurface->ReleaseDC( maHDC );
            }
        };
    }

    GraphicsSharedPtr createSurfaceGraphics(const sal::systools::COMReference<surface_type>& rSurface )
    {
        GraphicsSharedPtr  pRet;
        HDC aHDC;
        if( SUCCEEDED(rSurface->GetDC( &aHDC )) )
        {
            Gdiplus::Graphics* pGraphics = Gdiplus::Graphics::FromHDC( aHDC );
            if(pGraphics)
            {
                tools::setupGraphics( *pGraphics );
                pRet.reset(pGraphics,
                           GraphicsDeleter(rSurface, aHDC));
                return pRet;
            }
            else
                rSurface->ReleaseDC( aHDC );
        }

        throw uno::RuntimeException("could not get the DC to rSurface");
    }
}

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