Scaling processor for raster images

Details Scaling processor for raster images Scaling processor for raster images

1993-01-15

1994-11-08

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345185, G09G 106

Patent

active

053631196

ABSTRACT:
A system and method for scaling raster images. Digital pictures are stored in a run length encoded (RLE) format. Object specifiers include a picture index and a scale factor. A line fill state machine, or blitter, scales a raster scan line asynchronously of raster scan synchronization signals. A bit slice processor controls the operation of the blitter and vertical scaling. The growth or shrink scaling is performed about a pre-selected center of mass. A double buffered frame buffer allows one frame buffer to be read while the other is written.

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