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- %
- % An example logo character. Building the PostScript program that prints
- % your company logo is not addressed here; we assume you already have
- % such a program, that it's relatively simple, and that it prints the
- % logo by itself on a page. What you'll find here are instructions for
- % converting that logo program into a character that can be accessed by
- % troff and dpost.
- %
- % Building a new charlib character involves some PostScript programming.
- % We've tried to isolate parameters that you'll need to change (Xoffset,
- % Yoffset, and Scaling), but we can't guarantee things will work properly
- % with every logo program. PostScript is a complex language and subtle
- % interactions between your logo program and what we've done here can
- % cause problems.
- %
- % Tuning the new character is an iterative process. You may want to adjust
- % the size of the logo (via Scaling), it's position relative to adjacent
- % characters and the baseline (Xoffset and Yoffset), and the distance troff
- % moves after printing the character (width field in file ../S1). The steps
- % to follow are:
- %
- % 1: Create a simple troff test file for the new character. Something
- % like,
- %
- % .sp 1i
- % .ps 10
- % size 10: \(LH
- % .sp 1i
- % .ps 18
- % size 18: \(LH
- % .sp 1i
- % .ps 36
- % size 36: \(LH
- % .sp 1i
- % .ps 10
- % four logo characters: \(LH\(LH\(LH\(LH
- %
- % is sufficient. The test file can go anywhere.
- %
- % 2: Change into directory /usr/lib/font/devpost/charlib. All file
- % pathnames will be relative to that directory.
- %
- % 3: Save a copy of the working LH logo file. Then replace LH with
- % this file (i.e. LH.example). Changes described below should be
- % be made in the new LH file (not in LH.example).
- %
- % 4: Your PostScript logo program will eventually replace whatever
- % you find between the <<StartLogo>> and <<EndLogo>> comment lines
- % in the PostScript build_LH procedure (below). What's there now
- % prints an example logo that you can use until you understand the
- % remaining steps.
- %
- % 5: Print your troff test file using (assuming your making changes
- % in the devpost charlib directory),
- %
- % troff -Tpost testfile | dpost | lp ...
- %
- % 6: Adjust the logo positioning by changing the numbers assigned to
- % Xoffset and Yoffset (below). Both are in units of 72 per inch.
- % Positive offsets should move the logo to the right and up the
- % page.
- %
- % 7: Adjust the logo size by changing the the number assigned to
- % Scaling. Unitsize also controls scaling, but there's no good
- % reason to change both Scaling and Unitsize.
- %
- % 8: Control the horizontal distance troff moves after printing the
- % new LH character by changing the width (i.e. the number in the
- % second column) assigned to LH in file ../S1. Character width
- % adjustments should probably wait until you're satisfied with
- % the Scaling set in step 7.
- %
- % 9: Back to step 5 until your satisfied with the output.
- %
- % The remaining steps are suggested but not required:
- %
- % 10: Delete PostScript comments in your new LH charlib file - comments
- % start with % and go to the end of the line.
- %
- % 11: Update the width field assigned to LH in file ../shell.lib. The
- % new width should reflect what's currently in your S1 font file.
- %
- % 12: Make a similiar set of changes in /usr/lib/font/devLatin1/charlib.
- % You can use the devpost version of LH to devLatin1/charlib/LH,
- % but changes to files devLatin1/S1 and devLatin1/shell.lib must be
- % entered by hand.
- %
- /Logo_Dict 100 dict dup begin
- /Xoffset 0 def % 72 dpi with positive to the right
- /Yoffset 0 def % 72 dpi with positive up the page
- /Scaling 1.0 def % adjust this number to change the size
- /Unitsize 36 def % for point size scaling - leave it be
- /showpage {} def
- end def
- /build_LH { % don't bind this procedure
- Logo_Dict begin
- gsave
- /charwidth exch def
- currentpoint translate
- resolution 72 div dup scale
- Xoffset Yoffset translate
- Scaling Scaling scale
- ptsize Unitsize div dup scale
- %% Replace everything between the <<StartLogo>> and <<EndLogo>>
- %% comment lines by the PostScript program that prints your
- %% logo.
- %% <<StartLogo>>
- newpath
- .5 .5 scale
- 0 0 moveto
- 100 0 lineto
- 100 100 lineto
- closepath
- .5 setgray
- fill
- 0 setgray
- 10 10 translate
- 45 rotate
- 0 5 moveto
- /Helvetica findfont 18 scalefont setfont
- (Example Logo) show
- %% <<EndLogo>>
- grestore
- end
- } def
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