Adobe, Inc.

Atari Games Corporation

Douglas E Snyder

Daniel J Clark

Samuel Lee

James McClure

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.

Scaling processor for raster images

Apparatus and method for rendering graphic images as bit maps, including: (1) an input for receiving digital input commands; (2) a command interpreter to interpret the input commands and convert them into commands suitable for use inside the system; (3) a halftone screening section; and (4) a rendering section which outputs data suitable for use by a raster display or marking engine. The method and apparatus render multiple output pixels during each clock cycle and apply halftone screens or gray fills to an image.

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Sunnyvale, CA, United States of America

Douglas E Snyder