\input ptb-utils

\_checkloaded{layout}

\input pdfData/ptb-key-value

\def\setlayout#1{%
    \mapkeys{%
        page width={%
            name=_width,
            default=\novalue%
        },
        page height={%
            name=_height,
            default=\novalue%
        },
        horizontal margin={%
            name=_hmargin,
            default=\novalue%
        },
        vertical margin={%
            name=_vmargin,
            default=\novalue%
        }%
    }{#1}%
    \unless\ifx\_width\novalue%
        \pdfpagewidth=\_width\relax%
    \fi%
    \unless\ifx\_height\novalue%
        \pdfpageheight=\_height\relax%
    \fi%
    \unless\ifx\_hmargin\novalue%
        \hoffset=\dimexpr\_hmargin-\pdfhorigin\relax%
        \hsize=\dimexpr\pdfpagewidth - \_hmargin * 2\relax%
    \fi%
    \unless\ifx\_vmargin\novalue%
        \voffset=\dimexpr\_vmargin-\pdfvorigin\relax%
        \vsize=\dimexpr\pdfpageheight - \_vmargin * 2\relax%
    \fi%
}