How to dynamically set orientation or page height/width to portrait/landscape

Hello,

Is anyone knows how to dynamically set orientation or page height/width to portrait/landscape ?

If you need to print images, sometimes portrait, sometimes landscape, how would you achieve that ?

I may use subreports but how is the parameter(s) you need to send ? Would it be enough for the subreport to understand it ?  parameter with name "net.sf.jasperreports.engine.type.OrientationEnum" and value "OrientationEnum.LANDSCAPE" then the subreport understand it? Same for the page height/width ?

I'm sure someone already tried to do that but didn't find the answer...

Thanks in advance for your help

PS : I added a screenshot