Method of rotating image data in a partitioned display buffer

Details Method of rotating image data in a partitioned display buffer Method of rotating image data in a partitioned display buffer

1989-05-17

1990-08-07

Harkcom, Gary V.

Boots, shoes, and leggings

364521, 340727, G06F 1562

Patent

active

049473441

ABSTRACT:
A method of operating a graphics system, in which a host processor sends a display terminal image data and image orders. The image orders coordinate the position and size of a source rectangle area and the postion of a destination rectangle area in an image storage memory. The image data of the souce rectangle area is rotated by a rotation angle of 90 degrees, 180 degrees or 270 degrees and is stored in the image storage memory. The image storage memory operates as a storage buffer of a display unit, which displays the image data of the destination rectangle area. The image storage memory is partitioned into areas of K bits. Image data is rotated in blocks of K.times.K bits.

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