Computer graphics processing and selective visual display system – Computer graphics processing – Shape generating
Patent
1997-05-30
1999-02-16
Nguyen, Phu K.
Computer graphics processing and selective visual display system
Computer graphics processing
Shape generating
G06F 1500
Patent
active
058725741
ABSTRACT:
A minimum coordinate value at least in one direction of a parameter data group including a start point and an end point of a stroke is detected and outline coordinates are generated from the parameter data group by an outline coordinate generator and a minimum coordinate detector. An outline data generator stores range data indicative of a painting range into a predetermined address in an outline buffer on the basis of the outline coordinates and the minimum coordinate value or the maximum coordinate value. An address generator generates a drawing start address and an end address in a bit map memory in accordance with a value based on the minimum coordinate value and the predetermined address and with the range data. A painter paints by writing the same value into all data between the drawing start address and end address in the bit map memory, thereby generating a character pattern at a high speed by a buffer memory of a small capacity.
REFERENCES:
patent: 5751294 (1998-05-01), O'Brien, Jr.
patent: 5764239 (1998-06-01), Misue et al.
K. Nakashima, et al., "A High Speed Contour Fill Method For Character Image Generation", IEICE Transactions On Information And Systems, vol. E77-D, No. 7, Jul. 1994, pp. 832-837.
Hara Yuji
Minami Toshiaki
Ohzu Hayao
Yamazaki Tatsuhiko
Canon Kabushiki Kaisha
Nguyen Phu K.
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