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Size(t_int32 w = 0, t_int32 h = 0);
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Size& operator = (const Size& s);
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t_bool operator == (const Size& s) const;
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t_bool operator != (const Size& s) const;
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Size operator + (const Size& p) const;
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Size operator - (const Size& p) const;
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t_int32 GetWidth() const;
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t_int32 GetHeight() const;
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void SetWidth(t_int32 w);
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void SetHeight(t_int32 h);