The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 2003
Filed:
Jun. 26, 2000
Masahiko Murata, Chofu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A rendering apparatus has an image generation unit for generating a source image, an address generation unit for generating the read and write addresses of a bitmap memory, a DMA read unit for directly reading out data from the bitmap memory in accordance with the generated address, an input data holding unit for holding the data read from the bitmap memory, a logic operation unit for making a logic operation on the basis of the read data and data of the source image, an output data holding unit for holding the logically operated data, and a DMA write unit for writing the held data in the bitmap memory in accordance with the generated address, and synchronously processes a data input process for reading out data from the bitmap memory and holding that data in the input data holding unit, the logic operation, and an output process for writing the logic operation result at a predetermined address of the bitmap memory parallel to each other.