landscap.ps

GhostScript的源代码

%!
%  landscap.ps
% This file can be prepended to most PostScript pages to force 
% rotation to "landscape" mode.
%
% There are (at least) four possible ways to reasonably position a
% page after rotation.  Any of the four old corners (llx,lly e.g.)
% can be moved to match the corresonding new corner.
% By uncommmenting the appropriate line below (i.e., remove the 
% leading '%'), any such positioning can be chosen for positive or
% negative rotation.  The comments at the end of each "rotate" line
% indicate the ORIGINAL corner to be aligned. For example, as given
% below, the lower left hand corner is aligned.  When viewed, this 
% corner will have moved to the urx,lly corner.
%
%  James E. Burns, 3/8/93, [e-mail]
%
gsave clippath pathbbox grestore
4 dict begin
/ury exch def /urx exch def /lly exch def /llx exch def
%90 rotate  llx neg               ury neg              translate  % llx,ury
90 rotate  llx neg               llx urx sub lly sub  translate  % llx,lly
%90 rotate  ury lly sub urx sub   ury neg              translate  % urx,ury
%90 rotate  ury lly sub urx sub   llx urx sub lly sub  translate  % urx,lly
%-90 rotate urx neg               lly neg              translate  % urx,lly
%-90 rotate urx neg               urx llx sub ury sub  translate  % urx,ury
%-90 rotate llx lly add ury sub   urx llx sub ury sub  translate  % llx,ury
%-90 rotate llx lly add ury sub   lly neg              translate  % llx,lly
end