\startcomponent about-titlepage

\environment about-environment

\setvariables
  [document]
  [title=about,
   subtitle=luatex and context,
   author=hans hagen]

\startpagemakeup

    \startMPcode

        StartPage ;

            fill Page enlarged 5mm withcolor \MPcolor{maincolor} ;

            draw anchored.lrt(image(draw textext("\documentvariable{title}")    xsized(.750PaperWidth)            withcolor white),(lrcorner Page) shifted (-PaperWidth/20, PaperWidth/ 5)) ;
            draw anchored.lrt(image(draw textext("\documentvariable{subtitle}") xsized(.750PaperWidth)            withcolor white),(lrcorner Page) shifted (-PaperWidth/20, PaperWidth/10)) ;
            draw anchored.urt(image(draw textext("\documentvariable{author}")   xsized(.375PaperWidth) rotated 90 withcolor white),(urcorner Page) shifted (-PaperWidth/20,-PaperWidth/20)) ;

            setbounds currentpicture to Page ;

        StopPage ;

    \stopMPcode

\stoppagemakeup

\stopcomponent