mapmod.hxx

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#ifndef INCLUDED_VCL_MAPMOD_HXX
#define INCLUDED_VCL_MAPMOD_HXX

#include <vcl/dllapi.h>
#include <tools/mapunit.hxx>
#include <o3tl/cow_wrapper.hxx>

#include <ostream>

class Point;
class Fraction;
class SvStream;

class SAL_WARN_UNUSED VCL_DLLPUBLIC MapMode
{
    friend class        OutputDevice;

public:
    struct SAL_DLLPRIVATE ImplMapMode;

    MapMode();
    MapMode( const MapMode& rMapMode );
    explicit MapMode( MapUnit eUnit );
    MapMode( MapUnit eUnit, const Point& rLogicOrg,
        const Fraction& rScaleX, const Fraction& rScaleY );
    ~MapMode();

    void            SetMapUnit( MapUnit eUnit );
    MapUnit         GetMapUnit() const;

    void            SetOrigin( const Point& rOrigin );
    const Point&    GetOrigin() const;

    void            SetScaleX( const Fraction& rScaleX );
    const Fraction& GetScaleX() const;
    void            SetScaleY( const Fraction& rScaleY );
    const Fraction& GetScaleY() const;

    MapMode&        operator=( const MapMode& rMapMode );
    MapMode&        operator=( MapMode&& rMapMode );
    bool            operator==( const MapMode& rMapMode ) const;
    bool            operator!=( const MapMode& rMapMode ) const
    {
        return !(MapMode::operator==( rMapMode ));
    }
    bool            IsDefault() const;

    // Compute value usable as hash.
    size_t          GetHashValue() const;

    // tdf#117984 needs to be thread-safe due to being used e.g. in Bitmaps
    // vcl::ScopedBitmapAccess in parallelized 3D renderer
    typedef o3tl::cow_wrapper< ImplMapMode, o3tl::ThreadSafeRefCountingPolicy > ImplType;

    // If only the map unit is set.
    bool IsSimple() const;

private:
    ImplType        mpImplMapMode;
};

template<typename charT, typename traits>
inline std::basic_ostream<charT, traits> & operator <<(
    std::basic_ostream<charT, traits> & rStream, const MapMode& rMode)
{
    rStream << "MapMode(" << static_cast<unsigned>(rMode.GetMapUnit()) << ",(" << rMode.GetScaleX() << "," << rMode.GetScaleY() << ")@(" << rMode.GetOrigin() << "))";
    return rStream;
}

bool TooLargeScaleForMapMode(const Fraction& rScale, int nDPI);

#endif // INCLUDED_VCL_MAPMOD_HXX

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