wallen@sdcsla.UUCP (Mark Wallen) (05/10/85)
I have a troff and troff filter question. I would like to pass text and parameters under macro control "relatively transparently" to a post processing filter. In particular I want to pass some absolute page coordinates and a file name so that the post processor can paint the specified file which contains a bitmap image at the specified coordinates. My first idea was to utilize some of the "unused" control codes for the CATT and then ascii for the position and file name info. But, duh, I quickly realized that I probably couldn't figure out how to get troff to output "unused" control codes. (I also decided that I would need to translate the character info in the CATT to ascii table that most post processors have-- i.e., but that's no biggie). My next idea was to use some "bizarre" position (like -1,-1) as the flag that one of these requests was coming into the filter. My last idea was to ask the wizards of the net; troff is one of the more frequently attacked UNIX black boxes, so I feel sure that some one has already done something like this. Thanks for your time Mark Wallen UC San Diego wallen@nprdc.ARPA ucbvax!sdcsvax!sdcsla!wallen.UUCP