+ if (my ($cmdarg) = grep { $cmds[$_] eq '-area' } 0 .. $#cmds) {
+ # replace option by permillage crop
+ my @dim = map { $_ / 1000 } split /\D/, $cmds[$cmdarg + 1];
+ splice @cmds, $cmdarg, 2, (
+ -set => 'option:distort:viewport' => sprintf(
+ '%%[fx:w*%s]x%%[fx:h*%s]+%%[fx:w*%s]+%%[fx:h*%s]',
+ ($dim[2] || 1) - $dim[0], # width = x2 - x1
+ ($dim[3] || 1) - $dim[1], # height = y2 - y1
+ @dim[0, 1] # offset = x1,y1
+ ),
+ -distort => SRT => 0, # noop transform to apply viewport
+ );
+ }