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:
Jan. 27, 2015
Filed:
May. 11, 2012
Ronald Friedrich Pfeifle, Waterloo, CA;
Ronald Friedrich Pfeifle, Waterloo, CA;
BlackBerry Limited, Waterloo, CA;
Abstract
A method is provided for rendering pixels based on a certain type of Bézier curve, called a simple Bézier arch. The method uses an implicit function to determine whether each pixel in a domain triangle containing the arch is on the arch, on one side of the arch, or on the other side. The function's parameters can be linearly interpolated to allow efficient rendering of the triangle by a GPU. A method is also provided for applying the aforementioned method to render pixels, based on a non-linear Bézier curve having at most four control points, by subdividing the curve into simple Bézier arches as necessary. A computing device for performing these methods is also provided.