rview­port – Rel­a­tive View­port for Graph­ics In­clu­sion

Pack­age graph­icx pro­vides a use­ful key­word view­port which al­lows to show just a part of an im­age. How­ever, one needs to put there the ac­tual co­or­di­nates of the view­port win­dow. Some­times it is use­ful to have rel­a­tive co­or­di­nates as frac­tions of nat­u­ral size. For ex­am­ple, one may want to print a large im­age on a spread, putting a half on a verso page, and an­other half on the next recto page. For this one would need a view­port oc­cu­py­ing ex­actly one half of the file's bound­ing box, what­ever the ac­tual width of the im­age may be.
This pack­age adds a new key­word rview­port to the graph­icx pack­age speci­fiy­ing Rel­a­tive View­port for graph­ics in­clu­sion: a win­dow de­fined by the given frac­tions of the nat­u­ral width and height of the im­age.