Dec 102017
 
A C function written to D/L HP fonts from within Clipper S87.
File DLFONT.ZIP from The Programmer’s Corner in
Category C Source Code
A C function written to D/L HP fonts from within Clipper S87.
File Name File Size Zip Size Zip Type
DLFONT.C 4564 1692 deflated
DLFONT.DOC 2470 1224 deflated

Download File DLFONT.ZIP Here

Contents of the DLFONT.DOC file


DLFONT is a simple C function that is called from Clipper to download a
standard HP Laserjet II/III font.

It was written for Clipper S87.

When called, it opens up a file (Here called "DLFONTS.BAT"), and
parses through it, downloading each font that it finds. The batch
file form requirements are spelled out a little later, but its form
is the same as that for the "download" program from Glyphix, and
also a couple of public domain font downloaders.

The code is written to just set the font as permanent, although a
couple of minutes and a HP book can change all that to temporary,
if you like.

If you're not a Clipper kind of person: The PASCAL declaration of the
function should be changed to "int", as the program returns a 0/1
indicating success or failure of the download. Just remove all the
_retl's, and change the return statement to return(0/1).

I use the standard token functions to parse the batch/data file. It
is therefore sensitive to the makeup of the lines. The best form is:

<---------Beginning of file----------->
download ,
.
.
download ,
<----------End of the File------------->


Where is the full fontname. Example: TR14BLD.SFP
and is the number of the font with which it is
to be accessed later. Example: 27

Note that the separator between and is not
discretionary. It must match one of the token separators in the
function itself. Just use a comma and it'll be fine.

I used the blocksize of 1024, because that seems to be about the
fastest that I could push the laserjets I write for and not cause a
critical error (LPTX not ready: A/R/I or a write failure).

If you've written your own print_error handler in Clipper, you may
want to explicitly write to the handle of lptx (4 = LPT1, I seem to
recall) and then have a shot at print error recovery via the Clipper
handler. I had no such success on a constant basis, so I gave up
and reduced the print write buffer size.

If you find use for this, great. If you know of a better way,
fantastic: But please let me know. I truly enjoy playing around with
laser printers and learning new/better techniques for control.

Buck Webb
810 Ruxshire Drive
Arnold, MD 21012-1355

or on:
The Programmer's Corner BBS - (301) 596-1180



 December 10, 2017  Add comments

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