2 % Procedures that let you print any number of pages on each sheet of paper. It's
3 % far from perfect and won't handle everything (eg. it's not recursive), but should
4 % be good enough for now. Assumes the default page coordinate system has been set
5 % up before setupforms is called. lastpage makes certain the last page is printed,
6 % and should be called immediately after the %%Trailer comment.
8 % Three lines of code needed for page image clipping have been commented out for
9 % now. It works, but can really slow things down on some versions of PostScript.
10 % Uncomment them if you want to clip pages.
14 /formsperpage exch def
18 /min {2 copy gt {exch} if pop} def
21 % Save the current environment so the real showpage can be restored when we're all
22 % done. Occasionally helps when a banner page is included with the job.
28 % Number of rows and columns we'll need - may exchange them later.
31 /columns formsperpage sqrt ceiling cvi def
32 /rows formsperpage columns div ceiling cvi def
35 % Slop leaves a little room around the edge so page images can be outlined and have
36 % the borders show up. Distance is in default coordinates, so we need to figure out
37 % how it maps into user coordinates.
46 0 slop tempmatrix dtransform dup mul exch dup mul add sqrt
50 % Determine how big the image area is, using the clipping path bounding box minus
51 % a little and leave the coordinates of the lower left corner of the clipping path
52 % on the stack. Also temporarily set the size of each page (ie. formheight and
53 % formwidth) from the clipping path - just in case old software uses this stuff.
54 % Only works for coordinate systems that have been rotated by a multiple of 90
58 newpath clippath pathbbox
59 2 index sub dup /formheight exch def slop 2 mul sub /pageheight exch def
60 2 index sub dup /formwidth exch def slop 2 mul sub /pagewidth exch def
63 % New translators all store the size of each page in default coordinates in the
64 % pagebbox array and it can be different than the size determined by the clipping
65 % path. If we can find pagebbox use it to set the real dimensions of each page.
66 % Leaves the coordinates of the lower left corner on the stack, (either from
67 % pagebbox or clippath) so four numbers are there when we're done.
70 userdict /gotpagebbox known userdict /pagebbox known and {
72 pagebbox 0 get pagebbox 1 get tempmatrix transform moveto
73 pagebbox 0 get pagebbox 3 get tempmatrix transform lineto
74 pagebbox 2 get pagebbox 3 get tempmatrix transform lineto
75 pagebbox 2 get pagebbox 1 get tempmatrix transform lineto
77 2 index sub /formheight exch def
78 2 index sub /formwidth exch def
82 % Top two numbers are the displacement from the job's origin to the lower left
83 % corner of each page image when we finish setting up the new coordinate system.
90 % The two numbers left on the stack are the coordinates of the lower left corner
91 % of the clipping path. Go there and then up a bit so page images can be outlined.
98 % If the page is wider than high we may be able to do better if we exchange rows
99 % and columns. Won't make a difference in the current orientation or if rows and
100 % columns are the same.
103 pagewidth pageheight gt {
104 rows columns /rows exch def /columns exch def
108 % Find the orientation and scaling that makes things as large as possible. More
109 % than what's really needed. First calculation essentially finds the minimum of
110 % 1/rows and 1/columns.
113 pagewidth formwidth columns mul div pageheight formheight rows mul div min
114 pageheight formwidth columns mul div pagewidth formheight rows mul div min
119 0 pageheight translate
122 pagewidth 0 translate
127 pagewidth 0 translate
130 0 pageheight translate
134 pagewidth pageheight /pagewidth exch def /pageheight exch def
139 % Second number from the top is the best choice. Scale so everything will fit on
140 % the current page, go back to the original origin, and then get ready for the
141 % first page - which goes in the upper left corner.
145 xcorner neg ycorner neg translate
146 0 rows 1 sub formheight mul translate
149 % Try to center everything on the page - scaling we used is on top of the stack.
152 dup pagewidth exch div formwidth columns mul sub 2 div
153 exch pageheight exch div formheight rows mul sub 2 div translate
159 /!PreForms~showpage~ /showpage load def % save current showpage
165 gsave .1 setlinewidth outlineform stroke grestore
167 formwidth 0 translate
168 /currentform currentform 1 add def
169 currentform columns mod 0 eq {
170 columns formwidth mul neg formheight neg translate
172 currentform formsperpage mod 0 eq {
173 gsave !PreForms~showpage~ grestore
174 currentform columns mod formwidth mul neg
175 formsperpage columns idiv formheight mul translate
178 % outlineform clip newpath
184 xcorner ycorner moveto
187 formwidth neg 0 rlineto
195 0 1 formsperpage currentform sub formsperpage mod {
206 % Clip the first page image and save the environment we just set up, including
207 % the redefined showpage.
