Intelligent font rendering co-processor

Details Intelligent font rendering co-processor Intelligent font rendering co-processor

1993-12-23

1999-01-05

Herndon, Heather R.

395142, G06T 1100

Patent

active

058570675

ABSTRACT:
A method and apparatus convert font outlines to rasterized bitmaps. The method accesses stored outline data representing an object in a first coordinate space and transforms the outline data to corresponding data representing the object in a second corrdinate space. Regional relationship information is maintained in both corrdinate spaces through a non-linear transformation expressed as a plurality of linear transformation matrices, and a bit map, suitable for displaying the object, is generated as a result of the transformation. The apparatus of the invention analyzes Bezier curves and subdivides them as necessary until each portion is sufficiently flat to be approximated as a straight line, and calculates where line segments cross pixel midlines in order to fill the outline, and then generates the bit map.

REFERENCES:
patent: 4675830 (1987-06-01), Hawkins
patent: 4949281 (1990-08-01), Hillenbrand et al.
patent: 5222207 (1993-06-01), Yamada et al.
patent: 5241654 (1993-08-01), Kai et al.
patent: 5269000 (1993-12-01), Ohuchi
patent: 5309521 (1994-05-01), Matsukawa

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