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Title:
IMAGE PROCESSOR
Document Type and Number:
Japanese Patent JPH0863609
Kind Code:
A
Abstract:

PURPOSE: To speed up processing for obtaining a composed image composed by overwriting a graphic filled with a prescribed pattern on a draft or an image clipped in a prescribed area.

CONSTITUTION: An image composition controlling means 6 generates and applies address signals AF corresponding to respective picture elements in a graphic to be plotted and a write enable signal WEF to a frame buffer 11 and controls the buffer 11 so as to write graphic filling pattern data read out from a pattern memory 7 in a picture element position to which both the signals AF, WEF are applied. The write enable signal WEF is applied by finding out AND between the mask information of the graphic to be plotted and clipping area information stored in a clipping buffer 9. If an overlapped area is not generated between a rectangular area circumscribed with the graphic to be plotted and a rectangular area circumscribed with the clipping area, plotting processing is not executed. When the clipping area is rectangular, the write enable signal WEF is generated by the use of the shape information of the rectangle.


Inventors:
Yanagisawa, Katsuhiko
Konno, Kazuhito
Application Number:
JP1994000216636
Publication Date:
March 08, 1996
Filing Date:
August 18, 1994
Export Citation:
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Assignee:
FUJI XEROX CO LTD
International Classes:
G09G5/36; G06T1/00; G06T3/00; G06T11/00; G06T11/20; G06T11/40; G09G5/393; (IPC1-7): G06T11/40; G06T1/00; G06T11/00; G09G5/36
Attorney, Agent or Firm:
本庄 富雄



 
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