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- $Id: README,v 2.3 89/12/11 09:25:07 jta Exp $
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- file "License" for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- What we have here
- *****************
-
- dr_lib.c :
- ----------
-
- dr_lib.c is a collection of simple device level graphics drawing
- subroutines. dr_lib.c has several output choises: it will produce HPGL
- directly, produce plot(3) code, and use gl_plot(3) library to support EGA,
- CGA, HERCULES, IBM graphics printer, Laserjet, etc. gl_plot was posted in
- comp.sources.unix some time ago, and it is made by umix!m-net!dtlewis!lewis,
- the rest is made by me. There is a compile time scwith (see Makefile) to
- include code generation for gl_plot(). If you want to include gl_plot()
- code, make sure your gl_plot() library works in your system.
-
- I once made a quick port of gl_lib to 386 UNIX (Enix), but I have no longer
- acces to that system. My current system is Interactive SVr3.2, and it was
- not so easy to port gl_lib here. I also have X now, and that has Tektronix
- emulation. That is why I implemented the standard *NIX plot(3) library
- interface into dr_lib.c (*NIX has also tplot(1)), so this is my current
- method to get plots onto screen.
-
-
- draw.c :
- --------
-
- draw.c is intended to be a "front-end" for dr_lib routines. draw.c makes
- use of line and text drawing and pen movement routines to build x-y pictures
- with axes, labels, text etc. Nothing will prevent you from making your own
- main program to call directly functions in dr_lib.c, if you like. Real
- [nt]roff-able man page is also included in this kit (draw.1), hope it is up
- to date.
-
-
- kiero.c :
- ---------
-
- kiero.c is a fancy demo program that will produce data into its stdout, to
- be processed further by draw. It will also put enough definitions, so that
- you can pipe its stdout directly to draw.
-
-
- Compiling and Installing :
- --------------------------
-
- 1) Edit the Makefile to suit your system. Then say 'make'. This version of
- draw is developed under Interactive 386/ix SysV 3.2. draw was born veery
- looong time ago started under BSD 4.x, has also been compiled under
- MosseDos (MSC x), and even VMS. Porting to these systems should be quite
- easy, send the diffs to me if there is something special.
-
- 2) draw will use enviroment variable DRAWDEV to decide what kind of device
- it should work for. Default value is `ega' for gl_plot() subroutine
- package. That, again will use GLMODE to choose between EGA, CGA, VGA
- etc. I have:
- DRAWDEV=plot; export DRAWDEV # my default is to pipe to tplot(1)
- GLMODE=256; export GLMODE # but specifying -tega, I get it to
- # my Epson FX-80...
- PLOTDEV=lp; export PLOTDEV # ... which is /dev/lp
- in my .profile
-
-
-
- To do :
- -------
-
- - Real support for X.
-
- - Suggestions ?
-
-
- I would like to hear a) experiences in porting this package into
- different systems, b) bugs & new features, so that I can fix and
- include them in next version, if it ever will be made.
-
- jta@sah.vtt.fi voice: +358 0 4566425
-
- Juha Takala
- VTT/SAH
- PL 34
- 02151 Espoo
- Finland
-
-
-