1% 2% An example logo character. Building the PostScript program that prints 3% your company logo is not addressed here; we assume you already have 4% such a program, that it's relatively simple, and that it prints the 5% logo by itself on a page. What you'll find here are instructions for 6% converting that logo program into a character that can be accessed by 7% troff and dpost. 8% 9% Building a new charlib character involves some PostScript programming. 10% We've tried to isolate parameters that you'll need to change (Xoffset, 11% Yoffset, and Scaling), but we can't guarantee things will work properly 12% with every logo program. PostScript is a complex language and subtle 13% interactions between your logo program and what we've done here can 14% cause problems. 15% 16% Tuning the new character is an iterative process. You may want to adjust 17% the size of the logo (via Scaling), it's position relative to adjacent 18% characters and the baseline (Xoffset and Yoffset), and the distance troff 19% moves after printing the character (width field in file ../S1). The steps 20% to follow are: 21% 22% 1: Create a simple troff test file for the new character. Something 23% like, 24% 25% .sp 1i 26% .ps 10 27% size 10: \(LH 28% .sp 1i 29% .ps 18 30% size 18: \(LH 31% .sp 1i 32% .ps 36 33% size 36: \(LH 34% .sp 1i 35% .ps 10 36% four logo characters: \(LH\(LH\(LH\(LH 37% 38% is sufficient. The test file can go anywhere. 39% 40% 2: Change into directory /usr/lib/font/devpost/charlib. All file 41% pathnames will be relative to that directory. 42% 43% 3: Save a copy of the working LH logo file. Then replace LH with 44% this file (i.e. LH.example). Changes described below should be 45% be made in the new LH file (not in LH.example). 46% 47% 4: Your PostScript logo program will eventually replace whatever 48% you find between the <<StartLogo>> and <<EndLogo>> comment lines 49% in the PostScript build_LH procedure (below). What's there now 50% prints an example logo that you can use until you understand the 51% remaining steps. 52% 53% 5: Print your troff test file using (assuming your making changes 54% in the devpost charlib directory), 55% 56% troff -Tpost testfile | dpost | lp ... 57% 58% 6: Adjust the logo positioning by changing the numbers assigned to 59% Xoffset and Yoffset (below). Both are in units of 72 per inch. 60% Positive offsets should move the logo to the right and up the 61% page. 62% 63% 7: Adjust the logo size by changing the the number assigned to 64% Scaling. Unitsize also controls scaling, but there's no good 65% reason to change both Scaling and Unitsize. 66% 67% 8: Control the horizontal distance troff moves after printing the 68% new LH character by changing the width (i.e. the number in the 69% second column) assigned to LH in file ../S1. Character width 70% adjustments should probably wait until you're satisfied with 71% the Scaling set in step 7. 72% 73% 9: Back to step 5 until your satisfied with the output. 74% 75% The remaining steps are suggested but not required: 76% 77% 10: Delete PostScript comments in your new LH charlib file - comments 78% start with % and go to the end of the line. 79% 80% 11: Update the width field assigned to LH in file ../shell.lib. The 81% new width should reflect what's currently in your S1 font file. 82% 83% 12: Make a similiar set of changes in /usr/lib/font/devLatin1/charlib. 84% You can use the devpost version of LH to devLatin1/charlib/LH, 85% but changes to files devLatin1/S1 and devLatin1/shell.lib must be 86% entered by hand. 87% 88 89/Logo_Dict 100 dict dup begin 90 /Xoffset 0 def % 72 dpi with positive to the right 91 /Yoffset 0 def % 72 dpi with positive up the page 92 /Scaling 1.0 def % adjust this number to change the size 93 /Unitsize 36 def % for point size scaling - leave it be 94 /showpage {} def 95end def 96 97/build_LH { % don't bind this procedure 98 Logo_Dict begin 99 gsave 100 /charwidth exch def 101 currentpoint translate 102 resolution 72 div dup scale 103 Xoffset Yoffset translate 104 Scaling Scaling scale 105 ptsize Unitsize div dup scale 106 107 %% Replace everything between the <<StartLogo>> and <<EndLogo>> 108 %% comment lines by the PostScript program that prints your 109 %% logo. 110 111 %% <<StartLogo>> 112 newpath 113 .5 .5 scale 114 0 0 moveto 115 100 0 lineto 116 100 100 lineto 117 closepath 118 .5 setgray 119 fill 120 0 setgray 121 10 10 translate 122 45 rotate 123 0 5 moveto 124 /Helvetica findfont 18 scalefont setfont 125 (Example Logo) show 126 %% <<EndLogo>> 127 128 grestore 129 end 130} def 131 132