MCGREW@RU-BLUE.ARPA (06/19/84)
From: Charles <MCGREW@RU-BLUE.ARPA>
Hello,
I'm forwarding this for a friend not directly on the net. Please
send replies to this message to Pichnarczyk@ru-blue.
Thanks,
Charles
---------------
Does anyone know of any graphics libraries for the C Language for
microcomputers? I think one lives in Lattice C, but can anyone
confirm or deny its existance? If you have used it, what is your
impression of it?
Has anyone done any work on graphics in Aztec C?
For the record, I work with a Sony SMC-70 CP/M microcomputer, but
would appreciate information on any type of computer, or any type
of C with graphics.
Karen Pichnarczyk
(Pichnarczyk@ru-blue)
-------ijk@houxt.UUCP (06/21/84)
In the March 1984 PC Tech Journal, there are some assembler graphics routines for the IBM PC (and close look alikes). These are excerpted from "The Waite Group: BLUEBOOK of ASSEMBLY ROUTINES for the IBM PC" by Christopher L. Morgan. These routines allow you to paint pixels, draw boxes, and even draw straight lines quite efficiently. To be callable from C, I modified these routines to take arguments from the stack per normal calling conventions. (As posted, they use global variables, which violate good programming std). In addition, by studying the tech manual for int hex 10, I developed subordinate routines to set graphics mode, set colors, draw characters, etc. Finally, as an experiment, I came up with a C routine to draw a circle (and then plotted it with the set pixel rtn; note that you have to account for a 6/5 aspect ratio of the display). I would publish these routines, but since they're from a book, I don't want to violate the copywrite. Unfortunately, these routines are specifically tied to the IBM display characteristics - if your machine doesn't duplicate them, then you're out of luck. Ihor Kinal houxt!ijk