Dec 092017
Low level graphics (MSC or REXX).
File RXGRAPH.ZIP from The Programmer’s Corner in
Category C Source Code
Low level graphics (MSC or REXX).
File Name File Size Zip Size Zip Type
BIOSDOT.C 920 446 deflated
BITMAP.H 1135 389 deflated
BITMAP.LIB 5120 1484 deflated
DOT320.C 2038 816 deflated
DOT640.C 1034 546 deflated
DRAWBOX.REX 775 301 deflated
DRAWLINE.C 2230 972 deflated
LOADGRAF.BAT 261 156 deflated
README.DOC 2445 1161 deflated
RXDRAW.C 1487 512 deflated
RXDRAW.H 111 58 deflated
RXGRAPH.C 10688 3822 deflated
RXGRAPH.EXE 7098 4243 deflated
RXGRAPH.LIB 2560 1122 deflated
RXGRAPH.MAP 1403 347 deflated
RXGRAPH.OBJ 2549 1583 deflated
SCRFILL.C 240 154 deflated
SELECT.H 112 67 deflated
SETVIDEO.C 1498 492 deflated
TGRAPH.REX 711 336 deflated

Download File RXGRAPH.ZIP Here

Contents of the README.DOC file


Author: Bill Mayne
9707 Lawndale Dr.
Silver Spring, MD 20901

Comments, suggestions, and enhancements are welcome.

This archive contains a user written low level graphics interface for
Personal Rexx. RXGRAPH must be executed before any Rexx programs which
call it. It is a TSR routine which adds several functions as built in
functions for Rexx. The actual graphics functions may also be used by C
programs which have nothing to do with REXX.

Rexx functions defined:

get_mode - get the current video mode (mainly to be able to
restore it later.)
set_mode - set the video mode (graphics supported for 4 thru 6)
set_background - set the background color (0 thru 15)
set_pallette - select the color pallette (0 or 1)
put_dot - write one pixel
get_dot - read one pixel
draw_line - plot a line, using pixel coordinates
scr_fill - fill the entire screen with a given color
(only if using direct memory writes - much faster
than plotting individual dots or lines)

For examples of use see the .REX files in this archive.

Compiling instructions:

For the main routine, RXGRAPH.C compile by:

msc rxgraph /Zp /Ox;

The /Zp options specifies that structures be packed, and is necessary
for the Rexx interface to work. The /Ox option calls for maximum
optimization, and is recommended but not required. You must have
REXXCALL.H and the .H files from this archive in a directory where the
compiler can find them.

Several modules (including RXGRAPH.C) also support the /DBIOS option to
use BIOS calls instead of direct memory writes when plotting. This is
considerably faster (about 1.9 times as fast when plotting lines).
Note, however, that Rexx programs should make sure to use BIOS calls for
character output while in graphics modes.

All other routines are compiled normally. The /Ox option is recommended
and in some cases .H files from this archive are required.

Link as follows:

link rxgraph,,,bitmap+rxgraph
exemod rxgraph /max 100

The library rxgraph includes not only rxgraph.obj, but findint.obj and
rexxfcn.obj, required for the Rexx interface.

The EXEMOD call reduces the amount of memory used. You may experiment
with going lower. Generally if you go too low the result is that REXX
acts as if the functions defined are not found.

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