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Graphics implementation and conceptualization at Augmentation Research Center (RFC0191)

IP.com Disclosure Number: IPCOM000004153D
Original Publication Date: 1971-Jul-13
Included in the Prior Art Database: 2000-Sep-13
Document File: 4 page(s) / 8K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

C.H. Irby: AUTHOR

Abstract

This document is a brief description of the way in which graphics terminals are conceptualized and used at the Augmentation Research Center. All things described are implemented and have been operational for several months. Although our attention has initially been centered about the display of textual material, we are now about to turn our attention toward pictorial displays (hopefully much enhanced over our previous 940 line drawing capabilities).

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 35% of the total text.

RFC 191 Charles Irby

NIC 7136 Augmentation Research Center

Category D.6, I.1 Stanford Research Institute

13-JUL-71

GRAPHICS IMPLEMENTATION AND CONCEPTUALIZATION AT ARC

Overview:

This document is a brief description of the way in which graphics

terminals are conceptualized and used at the Augmentation

Research Center. All things described are implemented and have

been operational for several months. Although our attention has

initially been centered about the display of textual material, we

are now about to turn our attention toward pictorial displays

(hopefully much enhanced over our previous 940 line drawing

capabilities).

This document will discuss only those facits of display use

which have been implemented and are currently operational,

namely only those dealing with textual display.

included is a discussion of the use of multiple file viewing

display areas in NLS to provide cross file editing capabilities.

A description of our display and terminal input equipment will

be issued as a separate document.

NOTE: RFC 190 includes a functional description of the

implementation of the interface to our displays and is a

description of the way this interface was extended to include

"Processor-displays" (an IMLAC PDS-1, in this case) to our

system, thus enabling one to use Display NLS over any of our

teletype lines (including the network).

A "processor dsplay" is a display with Processing power which

can be controlled by character strings.

Description of the "conceptual display" implemented at ARC

The allocatable output unit for our display terminals (which

include our local terminals and all remote processor-displays) is

a rectangular "display area". A program treats this display area

much like it would a file which it has opened with write access.

When requesting the allocation of a display area, a program

specifies its attributes, including where it is to be on the

screen. The program is returned an identifier which it

subsequently uses to manipulate images within the display area

and the display area itself. Each string which the program

writes into the display area is also given an identifier, which

can subsequently be used to move, delete, replace, or change the

characteristics of that string.

The currently implemented characteristics are character size,

horizontal spacing between characters, and font of the

characters (e.g. blinking, italics, intensity, etc.).

The position of items in the display area are given relative

to the 0,0, which is the lower lef...