Browse Prior Art Database

Graphics Display

IP.com Disclosure Number: IPCOM000051254D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Ko, MA: AUTHOR

Abstract

Business graphics applications are economically provided by using a line bit store and a command store in parallel with a serially utilized text buffer and character generator.

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Graphics Display

Business graphics applications are economically provided by using a line bit store and a command store in parallel with a serially utilized text buffer and character generator.

Pie charts, bar graphs, line graphs, etc., are examples of business graphics. They are characterized by a simple graphic form when compared with the complexity of the graphics obtainable with a computer-aided design graphic display system. For a raster scan CRT, graphics are generally handled using a bit map memory wherein there is a one for one correspondence between the bits in the memory and the dots on the screen. Although acceptable from a functional standpoint, a large costly memory is required.

An attractive cost-effective alternative for simple business graphics is to construct the charts and graphs from commands loaded into a limited capacity command store. Text information can be handled in conjunction therewith by using a parallel-provided text buffer and character generator. Loadable into the command store are line commands specifying line counts, draw commands specifying vertical and/or horizontal draw directions, and bit commands specifying individual pixels (picture elements) on the display. The vertical draw command can be implemented using a line bit store where a bit is defined for each pixel on a scan line. The horizontal draw command can be implemented using a binary register.

Consider an arc from a pie chart extending from character position 25 of scan...