Image display processor for graphics workstation

• US 4,862,154 A
• Filed: 10/31/1986
• Issued: 08/29/1989
• Est. Priority Date: 10/31/1986
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Gonzalez-Lopez, Jorge
• Primary Examiner(s): Caldwell, Sr., John W.
• Assistant Examiner(s): OBERLEY, ALVIN E
• Application Number:
  US06/926,310
• Time in Patent Office: 1,033 Days
• Field of Search: 340/750, 340/721, 340/747, 340/703, 340/799, 340/798, 340/800, 340/801, 340/802
• US Class Current: 345/539
• CPC Class Codes: G09G 5/06 using colour palettes, e.g. look-up tables
• CPC Class Codes: G09G 5/399 using two or more bit-mapped memories, the operations of which are switched in time, e.g. ping-pong buffers

Abstract

The present invention provides for the combining of image and graphics data in a high-performance raster graphics workstation. It allows the definition of windows on the screen, the dynamic control of the position of those windows, the magnification factor (integer zoom), and a color translation table, corresponding to each window. All these functions are under user control. Response time of 10 new frame buffers generated per second provides a "real" time response.

Claims

1. A graphics workstation for displaying both image data and graphics data comprising:

first and second buses, said first bus communicating said image data and said graphics data and control information between elements of said graphics workstation and an external processing system, and said second bus communicating processed graphics data and processed image data between processing elements of said graphics workstation and one or more frame buffers;

system control processing means connected to said first bus for controlling workstation functions;

storage means connected to said first bus for storing image data and graphics data;

graphics data processing means connected between said first bus and said second bus for generating graphics images to be displayed from graphics data;

image data processing means connected between said first bus and said second bus for controlling the display of image data on a display;

a plurality of interleaved frame buffers connected between said second bus and a display means for storing said graphics images, said image data, or a composite of said graphics images and said image data to be displayed, said plurality of interleaved frame buffers excepting said graphics images and said image data at a first rate; and

display means for displaying image and graphics data at a second rate greater than said first rate.

2. A graphics workstation for displaying both image data and graphics data according to claim 1, wherein said image data processing means comprises:

input control means for controlling the transfer of input data into said image display processing means;

means for converting said input data into a form suitable for storing in a frame buffer; and

storage control means for controlling the storing of said converted input data into said frame buffer.

3. A graphics workstation for displaying both image data and graphics data according to claim 2 wherein said means for converting said input data into a form suitable for storing in a frame buffer comprises a plurality of look-up tables.

4. A graphics workstation for displaying both image data and graphics data according to claim 1, wherein said plurality of interlaved frame buffers comprises a pair of frame buffers which are interleaved such that while one frame buffer is being read out to provide video information to said display means the other frame buffer is available to be written with graphics and image data from said graphics data processing means and said image data processing means.